• 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:
    The present invention relates to a lowering device (1), comprising a base part (2), a handle (3), a lifeline (4) and a bracket (7) for a rescue harness or a seat belt, wherein the base part (2) and the handle (3) are fixedly connected to each other, wherein the base part (2) comprises a first deflection means (5) and a second deflection means (6), said first deflection means (5) also constituting a brake means located adjacent to the outlet opening (10) for the lifeline (4), that a first incoming part (4a) of the lifeline is arranged to run around said first deflection means (5) during abutment against the abutment surface (A) of said first deflection means, that a second extending part (4b) of the lifeline is arranged to run around said second deflection means ( 6) and further out through the outlet opening (10) while under load it abuts co-frictional engagement against the first incoming part (4a) of the lifeline along at least part of the distance where the first lifeline abuts against said abutment. bearing surface (A), that the moment point (M) is formed in an abutment area between the two parts (4a, 4b) of the lifeline and the abutment surface (A), that the handle (3) and the bracket (7) are placed on either side of the first deflection member (5). and arranged to rotate the base part (2) in a common plane of rotation (P) about this torque point (M), that the bracket (7) comprises a single rocker which is rotatably connected to the base part (2) in a pivot point (8) pre-rotation of the rocker in said plane of rotation ( P) and a fastening device (II) said rescue harness or seat belt, the suspension rocker being designed to engage said second part (4b) of the lifeline in the abutment area between the lifeline two parts (4a, 4b) and the abutment surface (A) for providing single compressive force. (F) towards the lifeline, whereby the abutment between the two parts of the lifeline, and thus the frictional force, can be increased.
    公开号:SE0950335A1
    申请号:SE0950335
    申请日:2009-05-13
    公开日:2010-11-14
    发明作者:Carl Baecklund；Per Johansson；Anders Lindgren
    申请人:Initium System Ab；
    IPC主号:
    专利说明:

    15 20 25 30 35 handle to minimize the risk that it will not function as intended due to incorrect handling.
    SE 371 933 discloses a device which is intended to automatically brake up a fall of a person connected to the device. The device is designed to lock a first band or rope (6) in that the rope runs around two abutment means (2, 3) and, when loaded, abuts with frictional engagement against itself. By actuating the device with a handle (7), the braking force can be reduced and lowering becomes possible.
    Similar devices are shown in US 3,340,964, JP 54-42898 and JP 50-76894.
    These devices have the disadvantage that when the device is rotated to increase the deceleration speed, there is no latch which prevents the device from being handled so that the braking force obtained by the frictional action completely ceases. This entails an obvious risk that an individual may fall to the ground, in principle during a free fall.
    The applicant has previously presented a solution to this problem. EP 1622687 discloses a lowering device in which an individual who handles the lifeline in the incorrect manner described above cannot fall into the ground. In a so-called panic mode, ie. when an individual clings to the handle and thus reduces the frictional engagement to a minimum, a second frictional engagement occurs between other parts of the lifeline and the lowering speed will be slowed down and eventually completely braked. However, it has been found that this device does not meet all the requirements for manageability. Among other things, it has been found that it has been difficult to adjust the position of the device along the lifeline in an unloaded position. Furthermore, the braking effect in the so-called panic mode is very strong, which results in a very strong braking that can be experienced as unpleasant. In addition, the transition from panic mode to a descent has not been as safe and comfortable for the user as desired.
    BRIEF DESCRIPTION OF THE INVENTION It is an object of the present invention to eliminate or at least minimize the above-mentioned problem, which is achieved by the lowering means comprising a hanger which is rotatably connected to the base part in a pivot point for rotation of the arm in said plane of rotation, where the hanger is engaging said second part (4b) of the lifeline in the abutment area between the two parts (4a, 4b) of the lifeline and the abutment surface (A) to provide a compressive force (F) against the lifeline with which the abutment between the lifelines both parts, and thus the frictional force, can be increased.
    Thanks to the invention, the problem of adjusting the position of the lifeline when the lifeline is unloaded is solved, which is a clear improvement of the handleability, at the same time as the lowering device prevents free fall in a panic position. Furthermore, a soft braking effect is obtained thanks to the fact that the compressive force will increase gradually.
    According to a further aspect of the invention, the compressive force can be produced by a moderate rotation of the lowering device, in a position before free fall occurs, which is achieved by said engagement with the lifeline by a portion (9) projecting in said plane of rotation (P) at the hammock. At the same time, the pivot point 8 can be placed at a distance from the first deflection member which results in a sufficient lever force to ensure a secure locking in an unaffected position.
    According to a further aspect of the invention, the compressive force can be made relatively large in that said projecting portion (9) is placed in a position between the pivot point (8) and a fastening device (11) for said rescue harness or seat belt, the hanging rocker forming a single arm lever where the acting force is regulated by rotation of the base part (2) so that an angle of rotation (v) formed between a longitudinal axis (13) of the fastening arm and a longitudinal axis (14) of the handle is reduced or increased.
    According to further aspects, the gear ratio of the hanging rocker amounts to at least a factor of 1: 1, preferably at least 1: 2, whereby the compressive force which it produces on the lifeline becomes so large that the angle of rotation (v) between a self-locking position, SLP (Self Looking Position), and a panic mode, PLP (Panic Looking Position), amounts to a maximum of 90 °, preferably a maximum of 75 °. This also helps to ensure that a safe function in the panic mode can be ensured even though the control requires moderate effort by the person regulating the lowering, 0 that the rotation angle (v) for regulating the lowering amounts to a maximum of 45 °, which gives a safety margin of about 30 ° in the upper part of the control area where the lowering means is self-locking, said first deflection means (5) has an oval / elliptical shape where the abutment surface (A) is located along the side having the largest radius of circumference whereby a longer abutment distance between the two parts of the lifeline is obtained which Results in a softer control of the fumigation rate. Furthermore, the risk of the lifelines lying next to each other is eliminated or at least minimized.
    Local overheating of the diverting member, which could affect the strength of the material and the operational reliability of the lowering device, is also avoided due to this.
    BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in more detail below with reference to the accompanying drawings, in which: Fig. 1 shows a perspective view of an inventive device according to the invention, Fig. 2 shows a plan view of the lowering device according to a preferred embodiment with one half of its housing is lifted away so that its inner parts and the lifeline appear, Fig. 3 shows a plan view according to Fig. 2 in a self-locking position, Fig. 4 shows a plan view according to Fig. 2 in a lowering position, and Fig. 5 shows a plan view according to Fig. 2 in a panic mode.
    DETAILED DESCRIPTION OF THE DRAWINGS Fig. 1 shows a perspective view of an inventive device 1 according to the invention comprising a base part 2 which comprises fastenings for a number of deflection means (see Fig. 2) and a hanging rocker 7. The base part is preferably housed inside and fixed to a protective cover e 15. Furthermore, the lowering device comprises a handle 3, a lifeline (see Fig. 2) and a bracket 7 for a rescue harness or a seat belt.
    Fig. 2 shows a plan view of the lowering device 1 according to a preferred embodiment with a part of its housing lifted away so that its inner parts and the lifeline appear. The base part 2 and the handle 3 are firmly connected to each other. Preferably, the handle forms an integral part of the housing 15. The base part 2 comprises a first deflection means 5 for the lifeline located in the upper part of the base part adjacent to an outlet opening 10 for the lifeline 4. In the lower part of the base part there is a second deflection member 6, placed slightly closer to the handle 3 than the first deflection means 5 and an inlet 12. Hereby the abutment surfaces of the lifeline around the respective deflection means become longer than if the deflection means were placed more in line with each other.
    The first deflection member 5 constitutes a braking member in that the lifeline is arranged to abut frictionally against itself next to this first deflection member, in the figure marked by arrows. An incoming part 4a thus meets an extending part 4b next to this first deflection member. The frictional engagement is effected by allowing the incoming part of the lifeline to run in an S-shape around the two deflection members. The incoming part of the lifeline runs from the inlet opening 12, starting around the first deflection member 5 during abutment against an abutment surface A facing the side of the base part 2 where the bracket 7 and the outlet opening 10 are located.
    Thereafter, the lifeline runs downwards and around the second deflection member 6, after which it runs further upwards and out through the outlet opening 10. In a loaded position, according to a preferred embodiment of the invention, the extending part of the lifeline will abut frictionally against the first incoming part along at least a part of the distance where the first lifeline abuts against said abutment surface A. For the distance s where frictional action prevails, the following relationship thus applies: 0 <S í A.
    It is an advantage if the first deflection member is given an oval shape and mounted so that the long side of the oval is directed towards the bracket 7. The long side of the oval means the side which has the largest radius of curvature. In this way, a relatively long abutment surface A is obtained without the lowering device becoming unnecessarily large for that purpose. A longer contact surface enables a longer distance where the lifeline can engage in friction against itself. This leads to an improved speed control during the lowering and reduces the local load on the lifeline in abutment areas around the deflection means, in the frictional engagement.
    It also reduces the local load in the area of the abutment surface A on the deflection member 5.
    In a preferred embodiment, the deflection means are made of metal, preferably light metal which, in addition to being light, also has good thermal conductivity. Conveniently, the deflection means can be manufactured by extrusion to keep down the manufacturing cost. The cover, which also includes the handle, is suitably made of injection molded thermosetting plastic. Of course, other materials that fulfill the purpose can be used.
    A torque point M is formed in connection with the first deflection member, in the area of the frictional engagement of the lifeline. The handle 3 and the bracket 7 are placed on either side of the first deflection member 5 and arranged to rotate the base part 2 in a common plane of rotation about this moment point M. The plane of rotation extends substantially parallel to the base part 2 and the rotation occurs under the influence of the individual weight. the handle with an opposite force. The bracket 7 comprises a hammock which is rotatably connected to the base part 2 in a pivot point 8 for rotation of the hammock in said plane of rotation. The hanging rocker also comprises some form of fastening device 11 at its lower end, here a hole in which an individual can clamp. With reference to Figs. 3-5, the function of the lowering device will now be described. Fig. 3 shows the lowering device in the self-locking position. The self-locking position refers to a position where the lowering device is not affected by any force in the handle. Here it is seen how the lifeline part 4b abuts frictionally against the incoming part 4a along most of the abutment surface A. In the self-locking position the lifeline part 4b and the longitudinal axis 13 of the hanging rocker 7 coincide in a vertical line L which gives a maximum engagement, ie. greatest braking effect, which is shown in Fig. 4. To facilitate the braking force, an opposite force is applied to the handle so that it is moved downwards, whereby the abutment between the two parts of the lifeline is gradually reduced. In a certain position, depending on the weight of the individual, the braking force is no longer sufficient to lock the rope.
    The descent will start. The individual can then regulate the deceleration speed by varying the rotation of the base part, ie. increase and decrease the distance where the parts of the lifeline abut each other with frictional engagement. Thanks to the fact that the first deflection means in a preferred embodiment is given an oval shape, a considerably improved control of the lowering speed is obtained.
    The hanging rocker is designed to engage with said second part 4b of the lifeline in the section where the lifeline is in frictional engagement with itself, i.e. in the abutment area between the two parts 4a, 4b of the lifeline and the abutment surface A. Said engagement with the lifeline is effected by a portion 9 of the hanging rocket projecting in said rotational plane, see Fig. 4. Hereby a compressive force F against the lifeline can be achieved whereby both parts of the lifeline will be pressed together in a press nip formed between the abutment surface A of the brake member and the projecting portion 9. The projecting portion is placed in a position between the pivot point 8 and the fastening device 11 for said rescue harness or seat belt. The swing rocker thus forms a uniform lever where the compressive force F is regulated by rotation of the base part in the plane of rotation, whereby a rotation angle v formed between a longitudinal axis 13 of the swing rocker and a line 14 parallel to a longitudinal axis of the handle is reduced or increased.
    Preferably, the swing is given a length so that its gear ratio amounts to at least a factor of 1: 1, preferably at least 1: 2, the compressive force F which it exerts on the lifeline being so large that the angle of rotation V between a self-locking position, SLP, (Self Looking Position) and a panic position, PLP, (Panic Looking Position), see Fig. 5, amounts to a maximum of about 100 °, preferably a maximum of about 75 °. Furthermore, it is an advantage if the angle of rotation v for regulating the lowering amounts to a maximum of about 45 °.
    Those skilled in the art will recognize that these angular indications are approximate because the weight of the individual to be lowered will result in different angles of rotation. Regarding the self-locking position, it is an advantage if there is a safety margin of at least 20 °, more preferably at least 30 ° in the upper part of the control area where the lowering device is self-locking, even in case a heavy individual is to be lowered.
    Furthermore, it is an advantage if the projecting portion 9 of the hanging rocker engages with the lifeline 4 when the angle of rotation v is reduced by a maximum of 45 ° from a maximum in the self-locking position. As a result, the abutment between the two parts of the lifeline, 4a, 4b, will have an extent which amounts to at least about half the total extent of the abutment surface A. This ensures that the compressive force F from the suspension rocker enters at an early stage of the lowering, i.e. before the lowering device has been rotated so far that the lowering speed for some may be perceived as unnecessarily high. As a result, a soft control of the lowering speed can be obtained. It is also understood that the compressive force F from the suspension rocker, which contributes to an increased frictional force during the lowering, enables a reduction of the frictional forces around the deflection members, which has been an object according to the invention in order to enable a simpler adjustment of the lowering position .
    According to a preferred embodiment, the first deflection member 5 is allowed to have an elliptical shape where the abutment surface (A) is located along the side which has the largest radius of circle. This achieves the advantage that a longer abutment distance is obtained, ie. a larger friction-forming abutment surface A between the two parts of the lifeline and between the incoming part 4a of the lifeline and its extending part 4b is obtained. Upon rotation of the lowering member from the self-locking position to a lowering position, the abutment surface between the incoming part of the lifeline will maintain a relatively long abutment distance towards the first deflection means 5 while the distance s for frictional engagement between the two parts of the lifeline will be reduced at different speeds. elliptical shape. This gives a combination effect of the frictional forces, which could be used to obtain a considerably improved functionality of the lowering device. Among other things, it has been possible to obtain a more controlled and smoother control of the reduction speed.
    The change in the distance of frictional engagement ds in relation to the change in the angle of rotation dv, (ds / dv) is thus least during the initial rotation of the lowering device, in the upper control area where the radius of the deflection member is at least, giving a safety margin of at least 20 ° in the self-locking mode. In the subsequent rule area, ie. the area for the lowering, on the other hand, the distance for frictional engagement will change more rapidly in relation to the corresponding change of the angle of rotation since the abutment in this control area takes place in the portion where the radius of rotation of the deflection member is greatest. dv / ds is thus largest in the control area for downsizing. By the action of the swing rocker in at least the lower control area for the descent, a further increase of the descent speed can be prevented, which has been a further object of the invention.
    I F ig. 5 finally shows the lowering device in a panic mode, SLP (Self Locking Position).
    The handle of the lowering device has here been rotated downwards further, past the control area for lowering, to a position where the lowering has stopped. Here it can be seen how the projecting part 9 on the hanging rocker 7 forms a very narrow press nip 16 against the lower part of the brake member 5. It is understood that without the influence of the swing, the braking frictional forces in this position would be at a minimum. Thanks to the effect of the swing, the frictional forces can be increased with a heat-resistant lowering device until the lowering is completely stopped.
    In order to keep the lifelines in a mutually correct position, ie. in order to prevent the lifelines from settling next to each other, which could considerably impair the function, the base unit 2 of the lowering device is also provided with two side supporting walls 17 located on either side of the deflection means. The front side support wall has been lifted off in the figures to enable an illustration of the interior of the lowering device. These side-supporting walls also form a stable attachment for the deflection members and the housing. Furthermore, the inside of the hollow has been provided with frames and holes for through-screws which hold the walls in the correct position inside the base part. The walls are preferably made of a material that resists abrasion well and provides good strength. In the preferred embodiment, the walls are made of light metal plates.
    Those skilled in the art will appreciate that the lateral walls should be adapted to the dimension of the lifeline but that the distance between them cannot be made too narrow as the friction which would arise between the lifeline and the walls would mean that the purpose of adjusting the position of the descent along the lifeline would not be achieved. If the parts of the lifeline, against all odds, were to lie next to each other, e.g. due to overload, the side supporting walls will to some extent take over the function of the hammock as the limited width offered can be likened to a press nip. However, even in such a position, the rocker will provide a frictional force in its contact with both parts of the lifeline.
    It will be appreciated that the swing is an additional safety factor in such a situation. As mentioned above, the side supporting walls cannot be placed too close, so it has been a desire to further minimize the risk of the two parts of the lifeline lying next to each other. Also in this context, the solution according to the invention proved to be advantageous. Thanks to the fact that the frictional action is formed along a substantially much longer distance when the first deflection member (brake member) is elliptical, a further improvement is obtained with regard to the risk that the lifelines lie next to each other. It has been found that this shape eliminates or at least minimizes the risk of the lifelines lying next to each other. Local overheating of the diverting member, which could affect the strength of the material and the operational reliability of the lowering device, is also avoided due to this.
    ALTERNATIVE EMBODIMENTS The invention is not limited by what has been described above, but may be varied within the scope of the appended claims. It is understood, for example, that the position of the hanging rocker can be varied in order to make it have different effects on the lowering.
    Furthermore, it is understood that by regulating the length of the swing rocker, the leverage effect can be regulated. A stronger lever effect and thus a greater compressive force can be obtained if the distance between the projecting part of the suspension rocker and the bracket for the rescue harness is increased. The shape of the hanging rocker can be varied. Likewise, the shape of the protruding part can be varied if a different control method would be desired. It is e.g. it is conceivable to give the projecting part a form-fitting adaptation to the braking member, whereby a longer abutment distance between the projecting part of the hanging rocker and the lifeline is obtained. The deflection means may have a different shape than the one shown in order in this way to change the abutment distance of the lifeline around them. For example, the lower deflection member can also be given an elliptical shape. The deflection means can be given different polygonal shapes and one and the same deflection means can be designed as a combination of shapes. Superellipses of various kinds that offer convex sides with rounded corners, e.g. a shape called the Reuleaux Triangle seems appropriate. Furthermore, it is understood that the mutual position of the deflection members and their position in relation to the hanging rocker can be changed.
    The orientation of the deflection means can be changed, e.g. For example, an elliptical upper deflection member can be oriented so that its “longitudinal axis” is made more parallel to the sloping side of the projecting portion of the suspension rocker so that the suspension rocker engages in the flacter portion of the deflection member. Instead of side-supporting walls, the deflection members can be provided with side-supporting frames, which, however, does not allow an equally rational manufacture. Similar to the lowering device previously presented in the applicant's patent with number EP 1622687, a wrap protection in the form of a deflection means 10 can be placed in the outlet opening in order to further reduce the risk of the lifeline lying next to each other at the upper deflection means.
    权利要求:
    Claims (7)
    [1]
    A lowering device (1), comprising a base part (2), a handle (3), a lifeline (4) and a bracket (7) for a rescue harness or a seat belt, where the base part (2) and the handle (3) are fixed interconnected, the base part (2) comprising a first deflection means (5) and a second deflection means (6), said first deflection means (5) also constituting a brake means located adjacent to an outlet opening (10) for the lifeline (4), that a first incoming part (4a) of the lifeline is arranged to run around said first deflection means (5) during abutment against an abutment surface (A) of said first deflection means, that a second extending part (4b) of the lifeline is arranged to run around said second deflection means (6) and further out through the outlet opening (10) while under load it abuts frictionally against the first incoming part (4a) of the lifeline along at least a part of the distance where the first lifeline abuts against said abutment surface (A) , att a torque point (M) is formed in an abutment area between the two parts (4a, 4b) of the lifeline and the abutment surface (A), that the handle (3) and the bracket (7) are placed on either side of the first deflection member (5) and arranged to rotate the base part (2) in a common plane of rotation (P) about this torque point (M), that the bracket (7) comprises a hammock which is rotatably connected to the base part (2) in a pivot point (8) for rotation of the hanger in said plane of rotation (P ) and a fastening device (11) for said rescue harness or seat belt, characterized in that the hanging rocker is designed to engage said second part (4b) of the lifeline in the abutment area between the two parts of the lifeline (4a, 4b) and the abutment surface ( A) for producing a compressive force (F) against the lifeline, whereby the abutment between the two parts of the lifeline, and thus the frictional force, can be increased.
    [2]
    2. A lowering device according to claim 1, characterized in that said engagement with the lifeline is effected by a portion (9) of the swing rocket projecting in said plane of rotation (P).
    [3]
    3. A lowering device according to claim 2, characterized in that said projecting portion (9) is placed in a position between the pivot point (8) and a fastening device (11) for said rescue harness or seat belt, the suspension rocker forming a uniform lever where the compressive the force is regulated by rotation of the base part (2) in the plane of rotation (P), whereby an angle of rotation (v) formed between a longitudinal axis (13) of the hanging rocker and a longitudinal axis (14) of the handle is reduced or increased. 10 15 12
    [4]
    A lowering device according to claim 3, characterized in that the gear ratio of the hanging rocker amounts to at least a factor of 1: 1, preferably at least 1: 2, the compressive force which it produces on the lifeline becoming so large that the angle of rotation (v) between a self-locking mode (SLP) and a panic mode (PLP) amount to a maximum of 100 °, preferably a maximum of 75 °.
    [5]
    5. A lowering device according to claim 4, characterized in that the angle of rotation (v) for regulating the lowering amounts to a maximum of 45 °.
    [6]
    A lowering device according to claim 5, characterized in that the projecting portion (9) of the hanging rocker engages with the lifeline (4) when the angle of rotation (v) is reduced by a maximum of 45 ° from a maximum in the self-locking position.
    [7]
    A lowering device according to claim 1, characterized in that said first deflection means (5) has an elliptical shape where the abutment surface (A) is located along the side having the largest radius of circle.
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    同族专利:
    公开号 | 公开日
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    法律状态:
    2015-02-24| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE0950335A|SE533775C2|2009-05-13|2009-05-13|Downhill device comprising a suspension rocker with formed braking means|SE0950335A| SE533775C2|2009-05-13|2009-05-13|Downhill device comprising a suspension rocker with formed braking means|
    EP20100775164| EP2429660A1|2009-05-13|2010-05-11|Lowering device comprising a swivel arm having contoured braking means|
    JP2012600013U| JP3176021U|2009-05-13|2010-05-11|Lowering device with swivel arm with contour brake means|
    US13/320,312| US20120103725A1|2009-05-13|2010-05-11|Lowering device comprising a swivel arm having contoured braking means|
    PCT/SE2010/050515| WO2010132012A1|2009-05-13|2010-05-11|Lowering device comprising a swivel arm having contoured braking means|
    CN 201090000984| CN202620513U|2009-05-13|2010-05-11|Lowering device comprising a swivel arm having contoured braking means|
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