• 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 invention relates to a strapping unit (1) comprising at least one pair of jaws (3), wherein each jaw (3) in said pair is provided with a punch member (4) configured to co-operate with a corresponding die member (5) of the strapping unit (1) in order to form a sealed or sealless joint in overlapping portions (2a, 2b) at the ends of a loop of metal strap received between the punch member (4) and the die member (5). Each jaw (3) in said pair comprises a base structure (6), wherein the punch member (4) of the jaw (3) has the form of a replaceable wear part of high-strength material which is removably mounted to the base structure (6).(Fig 1)
    公开号:SE1551366A1
    申请号:SE1551366
    申请日:2015-10-22
    公开日:2017-04-23
    发明作者:Mårstedt Peter
    申请人:Sund Birsta Ab；
    IPC主号:
    专利说明:

    Strappinq unit with replaceable wear part FIELD OF THE INVENTION AND PRIOR ART The present invention relates to a strapping unit according to thepreamble of claim 1 for forming a sealed or sealless joint inoverlapping portions at the ends of a loop of metal strap. Theinvention also relates to a strapping machine and a hand-heldstrapping tool provided with such a strapping unit.
    Strapping units for forming a sealed or sealless joint inoverlapping portions at the ends of a loop of metal strap areknown in many different configurations. Such a strapping unitmay for instance form part of a strapping machine or hand-heldstrapping tool to be used for securing a loop of metal strap around an object or a bundle of objects.
    SUMMARY OF THE INVENTION The object of the present invention is to achieve a new and favourable strapping unit of the above-mentioned type.
    According to the invention, this object is achieved by a strapping unit having the features defined in claim 1.
    The strapping unit of the invention comprises at least one pair ofjaws, wherein: - each jaw in said pair is provided with a punch memberconfigured to co-operate with a corresponding die member of the strapping unit in order to form a sealed or sealless joint in overlapping portions at the ends of a loop of metal strap receivedbetween the punch member and the die member; - each jaw in said pair comprises a base structure; and - the punch member of each jaw in said pair has the form of areplaceable wear part of high-strength material which isremovably mounted to the base structure of the jaw.Hereby, the punch member of a jaw can easily be exchanged fora new punch member when the punch member has been damaged due to wear.
    Further advantages as well as advantageous features of thestrapping unit according to the invention will appear from the following description and the dependent claims.
    The invention also relates to a strapping machine having thefeatures defined in claim 7 and a hand-held strapping tool having the features defined in claim 8.
    BRIEF DESCRIPTION OF THE DRAWINGS With reference to the appended drawings, a specific description of preferred embodiments of the invention cited as examples follows below. ln the drawings: Fig1 is a schematic perspective view of a part of astrapping unit according to an embodiment of thepresent invention, and Fig 2 is an exploded view of a jaw included in the strapping unit of Fig 1.
    DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS OFTHE INVENTION Fig 1 shows a part of a strapping unit 1 according to anembodiment of the present invention for forming a sealed orsealless joint in overlapping portions 2a, 2b at the ends of a loop of metal strap.
    The strapping unit 1 comprising at least one pair of jaws 3,wherein each one of the jaws in said pair is provided with apunch member 4 configured to co-operate with a correspondingdie member 5 of the strapping unit in order to form a sealed orsealless joint in overlapping portions 2a, 2b at the ends of a loopof metal strap received between the punch member 4 and the diemember 5. Each jaw 3 comprises a base structure 6, wherein thepunch member 4 of the jaw 3 has the form of a replaceable wearpart of high-strength material which is removably mounted to thebase structure 6, for instance by means of one or more fasteningmembers 7 in the form of screws of bolts, so as to enable anexchange of a punch member 4 for a new punch member when so needed. ln the embodiment illustrated in Fig 2, the punch member 4 ismounted to the base structure 6 by means of two fasteningmembers 7 in the form of screws, wherein the shaft 8 of eachfastening member 7 is configured to extend through a throughhole 9 in the base structure 6. An external thread on the shaft 8 of each fastening member 7 is configured for engagement with a corresponding internal thread of a hole (not shown) provided in the punch member 4.
    The base structure 6 of each jaw 3 is moveably mounted to abase frame of the strapping unit 1 so as to allow the jaws 3 to bemoved towards and away from each other, together with thepunch members 4, between a retracted inactive position (see Figln the embodiment illustrated in Fig 1, the base structure 6 of each jaw 1) and an advanced punching position (not shown). 3 is pivotally mounted to a base frame of the strapping unit 1 soas to allow the jaws 3 to be pivoted between the above-mentioned positions, but the base structure 6 of each jaw 3 couldas an alternative be displaceably mounted to the base frame ofthe strapping unit 1 so as to allow the jaws 3 to be linearly displaceable between the above-mentioned positions.
    When the punch members 4 and the die member 5 are designedto form a sealless joint, the punch members 4 and the diemember 5 are arranged to co-operate so as to cut mutuallyinterlocking incisions in overlapping portions 2a, 2b at the endsof a loop of metal strap received in a space between the jaws 3,when the jaws 3 are moved to the punching position. Theincisions formed by the punch members 4 and the die member 5are configured to lock the overlapping metal strap portions 2a, 2b to each other under the effect of a tensile force in the loop.
    When the punch members 4 and the die member 5 are designedto form a sealed joint, the punch members 4 and the die member5 are arranged to act on a seal member (not shown) in order to lockingly secure the seal member to overlapping portions 2a, 2b at the ends of a loop of metal strap received in a space between the jaws 3, when the jaws 3 are moved to the punching position.
    The strapping unit 1 may be provided with more than one pair of jaws 3 of the type described above.
    The base structures 6 of the jaws 3 are preferably made of ageneral structural steel and the punch members 4 are preferablymade of a high-strength steel.
    The strapping unit 1 is intended to form part of a strappingmachine or hand-held strapping tool, which is to be used forsecuring a loop of metal strap around an object or a bundle of objects.
    The invention is of course not in any way restricted to the embodiments described above. On the contrary, many possibilities to modifications thereof will be apparent to a personwith ordinary skill in the art without departing from the basic idea of the invention such as defined in the appended claims.
    权利要求:
    Claims (8)
    [1] 1. A strapping unit (1) comprising at least one pair of jaws (3),wherein each jaw (3) in said pair is provided with a punchmember (4) configured to co-operate with a corresponding diemember (5) of the strapping unit (1) in order to form a sealed orsealless joint in overlapping portions (2a, 2b) at the ends of aloop of metal strap received between the punch member (4) andthe die member (5), characterized in that each jaw (3) in saidpair comprises a base structure (6), wherein the punch member(4) of the jaw (3) has the form of a replaceable wear part of high- strength material which structure (6). is removably mounted to the base
    [2] 2. A strapping unit according to claim 1, characterized in that the base structure (6) is made of a general structural steel.
    [3] 3. A strapping unit according to claim 1 or 2, characterized in that the punch member (4) is made of a high-strength steel.
    [4] 4. A 1-3, characterized in that the punch member (4) of each jaw (3) is strapping unit according to any of claimsremovably mounted to the base structure (6) of the jaw by means of one or more fastening members (7).
    [5] 5. A strapping unit according to claim 4, characterized in thateach fastening element (7) has the form of a bolt or screw.claims
    [6] 6. A unit 1-5, characterized in that base structure (6) of each jaw (3) is strapping according to any of pivotally or displaceably mounted to a base frame of the strapping unit (1).
    [7] 7. A strapping machine for forming a sealed or sealless joint in5 overlapping portions at the ends of a loop of metal strap,characterized in that the strapping machine comprises a strapping unit (1) according to any of claims 1-6.
    [8] 8. A hand-held strapping tool for forming a sealed or sealless10 joint in overlapping portions at the ends of a loop of metal strap,characterized in that the strapping tool comprises a strapping unit (1) according to any of claims 1-6.
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    同族专利:
    公开号 | 公开日
    SE540676C2|2018-10-09|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1551366A|SE540676C2|2015-10-22|2015-10-22|Strapping unit with replaceable wear part|SE1551366A| SE540676C2|2015-10-22|2015-10-22|Strapping unit with replaceable wear part|
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