• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Protection against contamination of an opening in an outer surface of an elongated machine part. According to the invention, a flexible circular unbroken band is provided over opening and towards the outer surface whereby the band either itself covers the opening or holds a plug in the opening or is made out of a piece with a plug that fits moldably down into the opening.
    公开号:DK201570599A1
    申请号:DKP201570599
    申请日:2015-09-21
    公开日:2017-04-03
    发明作者:Tomas Hecht Olsen；Jan Nygaard
    申请人:Ngi As；
    IPC主号:
    专利说明:

    Protection against contamination of a contaminant, spacer and method of protection against contamination of a contaminant
    The invention provides a protection against contamination of an opening in an outer surface of an elongated machine part. The surface of the machine part must form a closed curve about a longitudinal axis thereof, so that an unbroken belt can be caused to enclose the machine part in a plane perpendicular to the longitudinal axis. Food, pharmaceutical and feed production plants have special requirements for ensuring a high standard of hygiene. It has been proposed in WO2014075678 (A1) to use spherical plug elements which are inserted spherical recesses in the opening, but there is a risk that the plug elements are flushed out of the recesses and therefore this prior art lacks the necessary approvals. It is the object of the invention to provide a fuse that can be approved both in accordance with 3A and EHEDG standards and which is easy to use and without significantly increasing costs.
    This is achieved by providing a flexible circular unbroken band across the opening and toward the outer surface whereby the band either itself covers the opening or holds a plug in the opening or is made out of a piece with a plug that fits form-fitting down in the opening. The elongated machine part may, for example, be cylindrical with either circular or non-circular cross-section of the longitudinal axis, for example it may well appear as a square or an oval tube. The circumferential unbroken belt must sit around the elongated machine part and provide a packing force all the way around the opening, and not least in the material transition between the bonding material and the material of the machine part, there must be compression tension, so that foreign bodies cannot penetrate here. , and is held between the band and the machine part.
    To further secure the circular band, this is according to claim 2 arranged in a groove extending around the surface of the machine part. Here, it is preferred that the groove follows a generator for the machine portion which extends across the longitudinal axis, thereby better ensuring that there are always compressive stresses between the sidewalls of the groove and the abutting surface of the circular band against the sidewalls.
    In particular, as stated in claim 3, it is preferred that the circumferential band has an axial extension, a radial thickness and a diameter dimensioned so as to be relative to the machine part and the aperture that in a material transition between the bonding material and the outer surface. of material of the machine part is always compressive stresses. This design ensures both that the circular band is well protected in the groove, so that it is not easily slid out of position, and at the same time that an almost smooth and uninterrupted transition between the band and the machine part can be said that no cracks or notches occur where dirt can accumulate.
    As stated in claim 4, it is preferred that the groove is at least as wide in the axial direction as the diameter of the opening groove passes. At the same time, the track must have a uniform depth. This ensures that the circumferential band has a contact surface at the bottom of the groove all the way around the upper edge of the opening. Further, the uniform depth of the groove also allows the tape to be made with uniform thickness in the radial direction, say it can be applied in any rotation to the outside surface of the machine part and to the holes, and yet always cover all the cries effectively.
    As stated in claim 5, it is further preferred that the groove is formed over the opening with the center of the opening centered relative to the extension of the groove in the axial direction. It is then ensured that the belt has a contact surface all the way around the opening at the bottom of the groove, and distortions where, for example, parts of the belt slip into the opening are avoided.
    Furthermore, the invention relates to a spacer having two ends and comprising a fastener part against a machine or other equipment at one end and a foot arranged for contact pressure against a fixed part at the other end, where the distance between the fastening part and the foot is adjusted by a force transmitting mechanism. comprising an outer cylindrical portion. Spacers of this kind are well known and are most often referred to as '' machine feet '', the foot typically being adapted to touch a flat surface such as a floor. It is well-known to attempt to make the distance-controlling mechanism, such that it meets high hygiene requirements, for example by ensuring that no external threads or other cracks are available in which bacteria-filled material can accumulate. In order to secure openings such as through threaded holes in an outer cylindrical sheath portion of such a machine foot, it is proposed according to the invention to use a circular band as indicated above. Such a fuse extends the scope for just this type of machine feed or spacers, which can now be approved for use in the pharmaceutical industry, food production and animal feed production.
    As stated in claim 7, the spacer has a threaded hole in the cylindrical outer machine part and a threaded screw is mounted in the threaded hole, so that the cylindrical machine part can be secured against undesired movements both in rotation and in the axial direction.
    As stated in claim 8, it is preferred that the circular band be of a relatively resilient rubber elastic type having a predefined hardness of about 60 pts and a relatively low tensile strength of not less than 4 MPa. With these parameters one can ensure a circular belt which is very flexible and easily removable or detachable from the cylindrical machine element and also by the presence of a groove around the surface thereof, it becomes easy to get the belt to slide down the track near it must be fitted. In an alternative design of the spacer, the ribbon is made of a material that does not speak disassembly after the first assembly. In this way, it is always possible to ensure that a new tape comes on when changes are made, and when attempting to change the spacer after mounting, there will be a visible marker that an intervention has been made, at least until a new band comes on space on the spacer.
    The invention also relates to a method for preventing contamination of an opening in an outer surface of a cylindrical machine part. The method is particular in that a flexible unbroken belt is mounted around the machine part and either holds a plug in the opening, is connected to a plug which sits in the opening or completely covers the opening, thereby establishing a power-sealing system between the surface of the machine part and the belt. The force-sealing abutment between the machine part and the circumferential belt ensures that no cavities or cracks occur between the abutment surfaces of the belt and the surface of the machine part. For example, if a flexible band material is used, such as Silicon Rubber 60 Shore A, Compound S6002F, it is simple to size the circumferential band, so that when abutting the cylindrical outer surface of the machine part it is always extended with a percentage extension that does not exceed the ultimate Extension which for this material is quoted at> 150% according to test method D412 and in return is at least extended 3%, preferably at least 4 to 6% in addition to the stress-free neutral state.
    The invention will now be explained in more detail with reference to the drawings, in which:
    FIG. 1 shows an enlarged section through a band placed in a groove across an opening according to the invention,
    FIG. 2 is a front view of the entire machine shoe from which the section of FIG. 1 is taken,
    FIG. 3 is a sectional view similar to FIG. 1, but from a machine shoe in a slightly different construction,
    FIG. 4 is the front view of the entire machine shoe from which the section of FIG. 3 is taken,
    FIG. 5 is an example of prior art in the art,
    FIG. 6A - FIG. 6D are pictures illustrating how the band is mounted in the groove, and
    FIG. 7A and FIG. 7B are pictures illustrating how to remove the tape.
    It is to be noted that in different embodiments of the invention, different appearance items have the same reference numerals to the extent that they perform substantially the same function in connection with the invention. In FIG. 5 shows an example of a fuse against contamination of an aperture 12 according to the prior art. Here, 2 refers to a cylindrical machine part. In the outer surface of the machine part there are openings 12 in the form of screw holes. Spherical plugs are inserted herein to prevent contamination of the holes with, for example, bacteria-containing substances 6. The plugs are arranged to just be pressed into spherical cavities which are established extremely against the surface of the cylindrical machine part 2 and with an opening towards the surface, which is somewhat smaller than the largest diameter of the spherical cavity. The spherical plugs 6 can be harnessed with force. However, it has been found that these plugs are considered to be at risk of being either ejected or flushed out of their spherical cavities during normal use, for example, in food production, pharmaceutical production or in other forms of production where bacterial contamination is to be controlled. . Such a plug, which has been accidentally ejected from its cavity, poses several safety challenges: firstly, the cavity and aperture 12 are left unprotected against bacteria-filled substances that may become stuck here, and partly the spherical plug 6 is a safety issue. may act as a foreign body in food, feed or medicine.
    In FIG. 1, there is shown a protection against contamination of an opening 12 according to the invention. In the outer surface 1 of a cylindrical machine part 2 is shown a flexible circular unbroken band 3 which is provided over an opening 12. In the illustrated example of the invention the machine part is a circular cylinder, but not circular cylinders or machine parts which are merely elongated. and having a longitudinal axis is also an object of the invention, merely requiring that the machine part has an outer surface which can be enclosed by an unbroken belt. If such a band is mountable on the outer surface of an elongated machine part, the belt will be able to cover and thus protect openings in the surface of the machine part. The opening 12 faces the surface 1 of the outer part and in the example shown, the band 3 itself covers the opening 12. But the band can also sit over a plug, of the type shown in FIG. 5 and here the plug 6 holds in the opening. In a further embodiment (not shown), the band 3 is made in one piece with a plug which fits form-fittingly into the opening 12, such that the band 3 can again ensure the plug's stay in the opening 12. In the three aforementioned ways of arranging the invention On, there will always be a very visible sign of error if the unbroken belt 3 is 1], especially if the belt is designed with a clear color contrast with the outside surface of the machine part. Usually, the cylindrical machine part 2 is made of stainless steel of a suitable quality in relation to how chemically aggressive the environment is, and it is relatively easy to allow the unbroken band 3 to be produced in a clear contrasting color, say as blue, yellow or red. Hereby, it can be seen at a glance whether all the mounts in a cylindrical machine part are properly protected, as well as those which might be on the back of the machine part relative to a viewer, since the presence of the unbroken belt will be an indication that the holes are protected. , and the absence of the bandage will indicate a lack of protection.
    As seen in FIG. 1 and 2, the machine part 2 has a circumferential groove 4 in its outer cylindrical surface 1, and the groove is positioned just as it crosses over the opening 12. Here, the band 3 sits down in the groove 4, and as seen in FIG. 1, there will be an almost uninterrupted transition between the outer surface of the belt 5 and the outer surface of the machine part 1, thereby protecting the belt from being displaced along the outer surface 1 and the risk of the band suffering damage from accidental impact on moving objects is also kept low.
    The outer surface 1 may belong to any machine part having openings to be protected, and in the example shown in Figures 1 and 2, the cylinder shape is circular, but non-circular cylindrical machine parts as well as tapered elements could also be present, e.g. square or oval -Roters with radial openings or cone surface with radial openings can be protected in the manner described here, saying that no foreign bodies enter the openings. In the example of FIG. 1, the circular cylindrical machine part 2 is an outer part of a so-called machine foot or spacer 10, whereby one end 9 of the machine foot 10 is mounted in a machine (not shown) and the opposite end 8 comprises a foot 7 or support forming against a wall, ceiling, floor or a suspension bracket for the machine when the machine foot is in use. This means that the unbroken belt cannot be removed from the machine foot 10 when it is first in use, but it can be displaced along the outer cylindrical surface when the opening 12 is available. It could be, for example, by adjusting the screw 11 which is located in an internal thread 13 in the opening 12.
    It is noted that the circumferential unbroken band 3 has an axial extension L, a radial thickness T and an inner diameter D, and these must be dimensioned relative to each other that in a material transition 14 between the band material and the outer machine part. material is always compressive. The compressive stresses are important because they ensure that foreign bodies penetrate between the two materials. If the band simply sits externally on the machine part 2 without providing a groove therein, the most important measure of the band is its inner diameter, and here the requirement would be that the inner circumference of the band does not at least exceed the outer circumference of the machine part 2. If the band If it is circularly cylindrical in its unaffected state, there will be a simple geometric connection between the inner diameter of the belt and the circumference along its inwardly facing surface. The band 3 will typically be made of a flexible rubber elastic material and will in practice always be cast as a circular cylindrical body, even if the machine part 2 has a non-circular perpendicular to its longitudinal axis or, for example, has a conical exterior surface.
    Should the band 3 sit in a groove as shown in FIG. 1, the L, T and D measures can be assumed to be the nominal dimensions for the band 3 when it is not around a cylindrical machine part 2, and here a nominal volume Vband for the band can be calculated. Similarly, from the example of FIG. 2, a nominal volume Vspor for the track 4 could be calculated, and here the requirement would be that Vband is an appropriate percentage larger than Vspor. The percentage will typically be in the range of 1% to 15%, preferably 5%. At the same time, it must be ensured that L, T and D for band 3 and track 4 do not differ substantially from each other, respectively, so that the band's size relative to the track is evenly distributed between L and T and always such that the length of the inner circumference of the band always less than the length of the inner circumference of the groove.
    It is preferred that the groove has an axial extension along the outer material surface 1 and has the same depth throughout its extension, the extension of the groove 4 in the axial direction being not less than the diameter of the opening 12. It is assumed here that the opening is circular, which will be the most common. This relationship between the circumferential groove 4 and the opening 12 ensures that all along the edge of the opening 12 there is a abutment surface 15 parallel to the surface of the cylindrical machine part 1. This construction helps to ensure that the band 3 is always flat to towards the edge of the aperture and seal it. As further seen in FIG. 1, the groove 4 is centered relative to the extension of the opening along the center axis of the machine part. This ensures that the piece of groove exceeds the extent of the aperture 12 in the axial direction is distributed equally on each side of the aperture 12, and then there will be an evenly distributed pressure between the band and the rim of the aperture which defines the abutment surface 15. Both of these in FIG. 2 and that of FIG. 4 of the invention comprises a spacer 10 having two ends 8,9, one end 9 of which comprises a fastener against a machine (not shown) or other equipment. Such a fastening can be made, for example, by a threaded rod which can be screwed into a threaded hole in the machine, or it may comprise a press fit, or a welding loss, say the spacer can be welded to the machine. Other well-known forms of fasteners between the spacer and the machine can be used. At the other end 8 there is conveniently provided a foot 7 arranged for contact pressure against a fixed part. Here, the foot 7 can be arranged in many different ways, either as a gripper for mounting around rudders, or as a welding rod which is welded to a beam or other supporting part. Central to the function of the spacer is that the distance between the attachment portion 9 and the foot 7 is adjustable via a force transmitting mechanism and comprises an outer cylindrical portion 2 with a surface 1. Such spacer 10 is shown in FIG. 2 and FIG. 4 shown with a traditional foot 7 at one end, the foot 7 comprising a rubber element 17 with a contact surface 18 arranged to touch, for example, a floor in a workshop or production room. For example, the rubber member 17 is vulcanized into a metal casing 19. Between the rubber member 17 and a force-transmitting leg 20, it is possible to a flexible joint, such as a ball joint 21, is provided, which allows the force-transmitting leg 20 to be angled relative to the foot 7. Usually, a central portion of the metal cap 19 and the underside of the power-transmitting leg 20 are formed as the two relative to each other freely. rotatable parts of a ball joint 21.
    A mechanism for adjusting the length of the spacer 10, which is not shown in detail in the figure, is arranged between the power-transmitting leg 20 and fixed to a machine 9. It may be a cylinder piston pair or it may be a spindle mechanism with an external thread belonging, for example, to the power-transmitting leg 20, and an internally corresponding thread in a cylindrical tube. By rotating the rudder relative to the leg, the two elements will make a telescopic motion relative to each other, and as the cylindrical rudder is connected to the end 8 with attachment to the machine, the distance between the foot 7 and the machine can be adjusted.
    In order to prevent accidental rotation or displacement of the cylindrical machine part 2 with respect to the power-transmitting leg 20, screws 11 are inserted in the cylindrical machine part 2 in openings 12 with threads 13 as previously explained.
    The cylindrical machine part may have functions other than those shown and described here, for example it may be a counter-nut, which must then be similarly blocked with a pin screw 11.
    It is preferred in accordance with the invention that the circular band is made of silicone and has a predefined hardness in Shore A of between 55 and 70 pts, preferably a hardness of 60 pts and a tensile strength of not less than 4 MPa. This ensures that the band can be mounted relatively easily around the outer cylindrical machine part 2 of a machine foot and partly that the band 3 can apply with the necessary force against the metal surface of the element and seal against it. In an alternative embodiment, the circular band is made of a plastic type having such a hardness and elastic extension that removal from the machine part will result in destruction of the belt. In this way, the tape will be able to act as a break indicator showing whether an earlier opening has been opened for access to the sealed openings 12. In Figs. 3 and FIG. 4, a slightly different configuration of a machine foot 10 is shown, in which the unbroken belt 3 sits on a cone-shaped extension 22 of cylindrical machine part 2I. This extension 22 is located closest to the foot 7, but could be located at the opposite end of the machine part 2. As seen in FIG. 3, the groove is formed as a pivot with axial end walls 23 perpendicular to the cone face's rectilinear generators 25, and with a base 24 parallel to the cone face's rectilinear generators 25. An unbroken band suitable for this groove must have a cone-shaped parallel extending inner and outer surface, and a uniform thickness between them. In the example shown, the opening 12 is not centered relative to neither the upper edge of the groove nor the groove bottom. But, of course, it is possible to center the aperture 12 after the bottom 24 of the circular groove, such that the upper edge of the aperture 12 is the same distance from the axial end walls 23 of the circular groove 4, the parallel abutment surface 15 here always has a minimum diameter all the way around. Opening 12. As indicated in the figure, the outer cone-shaped surface of the belt is slightly arched when the belt sits in the groove, thus slightly exceeding the rectilinear generators of the machine part 25. This is because the volume of the belt is slightly larger than the volume of the track, as described to ensure compressive stresses between the respective abutment surfaces of the band and the groove.
    The grooves in the above examples are with parallel sides extending perpendicular to the surface of the machine part and having a flat bottom which is also parallel to the surface of the machine part in a plane of cutting through the longitudinal axis of the machine part. But other types of tracks are possible, for example with v-shaped walls and rounded bottom. Or the groove can be formed as a semicircle in a plane of intersection through the axis of the machine part. For example, in the transition from the side of a groove to the surface of the machine part, a sharp inwardly directed flange may be provided, under which the rubber-elastic band material is pressed down to be properly mounted. Removing the strap will thus be difficult, and may require the use of tools, however, such a construction can improve hygienic protection. Figures 6A - 6D show a series of photographs illustrating various stages in the fitting of a band: - 6A band 3 is on top of the foot and is not mounted, - 6B band 3 has become a lubricant, say as water and possibly soap, and with finger force, the band is placed in the groove at the away from the operator side of the machine foot, and is now pushed and / or pulled out, says it can fall into the track, - the 6C tape is pushed the last piece down the track by the facing towards the operator side of the machine foot, - The 6D band is massaged along its outer surface until it is evenly distributed along the surface of the cylindrical machine part, saying there are no cracks between the band and the groove. Figures 7A and 7B show pictures of how to remove the band 3: - 7A here, the operator with a forceps grip and a certain pressure with the fingers about the band 3 fingers in the same direction, eg away from the operator, thereby exposing the surface of the band to two opposite sides. a shear force away from the operator. This means that the tape in the area closest to the operator is stretched and in the area facing away from the operator will accumulate extra band material, - 7B here is how the operator places fingertips or nails under the accumulated extra band material which has contributed to the band in this area. area is sufficiently read for this to be possible. Once the fingers are under the strap, it can be stretched relatively easily, saying it can be left out of the groove all the way around. In the example shown, the strip has an extension in the axial direction of the cylindrical machine part of 9.0 mm, the groove having an extension in the axial direction of 7.5 mm. This ensures that the band when it is in the groove always fills it up completely and applies with compressive force to the sides of the groove.
    Reference number: 1 Exterior surface 2 Cylinder-shaped machine part 3 Round-end unbroken band 4 Circular groove 5 External surface of the band 6 Spherical plugs 7 Foot 8 End with abutment on fixed part 9 End with attachment to machine 10 Machine base or spacer 11 Screw 12 Opening 13 Internal thread 14 Material 15 Parallel abutment surface 16 17 Rubber element 18 Abutment surface 19 Metal casing 20 Power transmitting legs 21 Ball joint 22 Tapered extension 23 End walls, 24 Bottom of groove, 25 Tapered rectangular generators,
    权利要求:
    Claims (10)
    [1]
    1. Protection against contamination of an opening (12) in an outer surface (1) which forms a closed curve in a plane perpendicular to a longitudinal axis of an elongated machine part (2) characterized by a flexible circular unbroken band (3) is provided over opening (12) and towards the outer surface (1) along the closed curve, whereby the band (3) either itself covers the opening (12) or holds a plug in the opening or is made integrally with a plug which fits form-fitting into the opening (12).
    [2]
    2. A fuse according to claim 1, characterized in that the machine part (2) has a circumferential groove (4) in its outer surface (1), the groove (4) crossing over the opening (12) with the circumferential leg (3). ) is in the groove (4).
    [3]
    A fuse according to claim 1 or claim 2, characterized in that the circumferential web (3) has an axial extension, a radial thickness and a diameter which are dimensionally sealed with respect to the machine part and the opening (12). a material transition between the binder material and the outer surface (1) of the material of the machine part always tire pressure.
    [4]
    4. A fuse according to claim 2 and claim 3, characterized in that the groove (4) has an extension in an axial direction along the outer surface (1) and has the same depth throughout its extent, the extension in the axial direction being not less than Diameter of opening (12).
    [5]
    Fuse according to claim 4, characterized in that the groove (4) is centered relative to the extension of the opening longitudinal axis of the machine part, such that the piece of groove (4) possibly exceeds the extension of the opening in the axial direction is distributed equally on each side of the opening ( 12).
    [6]
    A spacer (10) having two ends and comprising a bracket against a machine or other equipment at one end (9) and a foot (7) arranged for contact pressure against a fixed part at the other end (8), the spacing between the bracket (9) and the foot (7) is adjustable by a force transmitting mechanism comprising an outer cylindrical machine part (2), wherein a fuse according to one of claims 1 to 5 is provided by an opening (12) in the outer surface ( 1) of the cylindrical machine part (2).
    [7]
    Spacer (10) according to claim 6, characterized in that the aperture (12) is a threaded hole and a screw (11) is screwed into the threaded hole which secures the outer cylindrical machine part (2) axially and rotationally against a inside part.
    [8]
    Spacer (10) according to claim 6 or 7, characterized in that the circular band (3) is made of silicone and has a predefined hardness in Shore A of between 55 and 70 pts, preferably a hardness of 60 pts painted according to for D2240 as well as tensile strength of not less than 4 MPa painted in accordance with D412.
    [9]
    Spacer according to one or more of claims 6-7, characterized in that the circular band (3) is made of a plastic type having such a hardness and elastic extension that removal from the machine part (2) will result in the destruction of the bundle (3).
    [10]
    Method for safeguarding contamination of an opening (12) in an outer surface (1) of a cylindrical machine part (2), characterized in that a flexible unbroken band (3) is mounted around the machine part (2) and either holds a plug fixed in the aperture (12), is contiguous with a plug which sits in the aperture (12) or completely covers the aperture (12), thereby establishing power-sealing abutments between the surface (1) of the machine part and the band (3).
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    同族专利:
    公开号 | 公开日
    WO2017050337A1|2017-03-30|
    DK179015B1|2017-08-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    CH668630A5|1985-10-30|1989-01-13|Hans Oetiker|QUICK COUPLING ARRANGEMENT.|
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    CN203748868U|2014-03-13|2014-08-06|育才控股集团有限公司|Desk for children|
    法律状态:
    2019-04-14| PBP| Patent lapsed|Effective date: 20180921 |
    优先权:
    申请号 | 申请日 | 专利标题
    DKPA201570599A|DK179015B1|2015-09-21|2015-09-21|Protection against contamination of an orifice, spacer and method of safeguard against contamination of an orifice|DKPA201570599A| DK179015B1|2015-09-21|2015-09-21|Protection against contamination of an orifice, spacer and method of safeguard against contamination of an orifice|
    PCT/DK2016/050290| WO2017050337A1|2015-09-21|2016-08-30|Protection against contamination of an opening, distance piece and method for protection against contamination of an opening|
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