DE102010000053A1 - Pliers for assembly and disassembly of self-latching chain link of bicycle chain, have lever sets with two jaws, respectively, where each jaw of one set has clamping piece that forms clamping surface and is closed by compressing handgrip - Google Patents

Abstract

The pliers have a lever set (2) secured at a handgrip (1) and provided with a pair of clamping jaws (21). Each clamping jaw of the set possesses a clamping piece (211) that forms a curvilinear clamping surface (212) and is opened by compressing the handgrip. Another lever set (3) is secured at the handgrip and comprises a pair of clamping jaws (31), where each clamping jaw of the latter set possesses a clamping piece (311) that forms a curvilinear clamping surface (312) and is closed by compressing the handgrip. The surfaces rest against an arc shaped control unit of a string bolt (13).

Description

The invention relates to a pair of pliers for mounting and dismounting a chain joint, in particular a tool that is suitable for disassembly of selbstverrastenden link plates of the bicycle chain.

For a bicycle chain usually outer link plates and chain pins, which are provided at one end or at both ends with an annular locking groove used. The outer link plate accordingly has a C-shaped locking part which can engage in the locking groove.

When disassembling these link plates, a suitable tool must be used to first hold the link plate, then push the outer link plate out and then push out the chain pin. The disassembly devices for chain under the international class B21L 21/00 are suitable for the disassembly of this chain.

For the self-locking link plates, like from the 1 from US 5291730 or the 1 to 3 from US 5362282 is known, but no separate tool is available. When disassembling these link plates a sharp pliers is used to push the chain pin from the recess in the opening. When assembling these link plates and a hand tool is required to push the chain pin from the opening into the recess. Since the end of the chain pin of the self-latching link plates is arcuate, there is only a point contact between the chain pin and the jaws of the pointed forceps so that the point forceps can easily slip.

The direction of disassembly and assembly of the self-locking link plates is reversed, d. H. During disassembly, the clamp clamps the chain pin from outside to inside and during assembly the clamp clamps the chain pin from the inside to the outside. If a normal pointy pliers without spring element (in the normal state, the pliers are closed / the left and right levers intersect) is used, the opening of the pliers is very power consuming. If pliers that are normally open (the left and right levers are parallel to each other and hinged together in the middle) are used, opening the pliers will be more efficient. Therefore, the disassembly and assembly of the chain require two different pointed pliers.

Therefore, so far a tool is not available, which is suitable for both disassembly and for mounting the self-locking link plates.

The invention has for its object to provide a pair of pliers for mounting and dismounting a chain joint whose jaws have clamping pieces that form curved clamping surfaces that are arcuate and can be formed toothed, whereby the curved clamping surfaces can rest against the arcuate outer sides of the chain pins, so that slipping is avoided.

This object is achieved by the inventive pliers for mounting and dismounting a chain link comprising a handle, a first set of levers and a second set of levers, wherein the first set of levers is attached to the handle and has two opposite first jaws, each having a first clamping piece wherein at least one of the first clamping pieces forms a curved clamping surface, the second lever set being fixed to the handle and having two opposed second jaws each having a second clamping piece, at least one of the second clamping pieces forming a curved clamping surface, and wherein the first Open clamping pieces by squeezing the handle and the second clamping pieces are closed by squeezing the handle.

The handle includes two handles, two mounting tabs, a bolt and a spring member, the two handles each having an end for the mounting pin and hinged together near the mounting pins via the bolt, the spring member having two ends and between the two handles is arranged, and wherein the two ends of the spring element are attached to the two handles.

The first lever set includes a first left lever, a first right lever, and a first bolt, the first left lever and the first right lever forming the opposed first jaws, the first left lever and the first right lever articulating with each other via the first pin wherein a first mounting hole is provided between each of the first jaws and the first bolt, the fastening pins of the handle being guided through the first through holes, whereby the first lever set is fixed to the handle, the first jaws having the first clamping pieces, and wherein at least one of the first clamping pieces forms a curved clamping surface.

The second lever set includes a second left lever, a second right lever, and a second bolt, the second left lever and the second right lever forming the opposed second jaws and each having an end facing away from the second jaw, wherein the second left lever and the second right-hand levers are hingedly connected to each other via the second pin, a second attachment hole being provided between the opposite ends and the second pin, the fixing pins of the handle being guided through the second through-holes, whereby the second lever set is fixed to the handle, wherein the second jaws form the second clamping pieces, and wherein at least one of the second clamping pieces forms a curved clamping surface.

In another embodiment, the collet for assembling and disassembling a chain link comprises a handle and a lever set, the lever set being attached to the handle and having two opposed first jaws and two opposed second jaws, the first jaws each having a first jaw and the first jaw second jaws each having a second clamping piece, wherein the two first clamping pieces and the two second clamping pieces form at least one curved clamping surface, and wherein the two first clamping pieces are opened by squeezing the handle and the two second clamping pieces are closed.

In yet another embodiment, the collet for assembly and disassembly of chain link includes a handle and two sets of levers, wherein the handle can move the two sets of levers, each lever set two opposite first jaws and two opposite second jaws, wherein between the first jaws and the second jaws a joint is provided, wherein the first jaws each have a first clamping piece and the second jaws each have a second clamping piece, wherein the two first clamping pieces form at least one curved clamping surface and the two second clamping pieces at least one curved clamping surface.

The two first and second clamping pieces each form a curved clamping surface, wherein the curved clamping surfaces of the first clamping pieces facing away from each other and the curved clamping surfaces of the second clamping pieces face each other.

The curved clamping surfaces are arcuate or toothed or arcuate and toothed.

In use, the user can use the handle to move the two sets of levers so that the chain can be assembled and disassembled by the same actuating movement, with the user only having to turn or turn the tongs accordingly.

• 1. zeit- und kraftsparende Handhabung,
• 2. Montage und Demontage der Kette,
• 3. Zuverlässiges Klemmen der Kettenbolzen ohne Verrutschen.

Therefore, the invention has the following advantages:

• 1. time and energy saving handling,
• 2. assembly and disassembly of the chain,
• 3. Reliable clamping of the chain pins without slipping.

In the following, the invention will be described in detail with reference to exemplary embodiments with reference to the drawing. In the drawing shows:

1 an exploded view of an embodiment of the invention,

2 a perspective view of the embodiment of the invention,

3 a perspective view of the embodiment of the invention after turning by 180 °.

4 an exploded view of another embodiment of the invention,

5 a perspective view of the further embodiment of the invention and

6 a perspective view of yet another embodiment of the invention.

1 to 3 show an embodiment of the invention, which has a handle ( 1 ), a first lever set ( 2 ) and a second lever set ( 3 ). The first lever set ( 2 ) is on the handle ( 1 ) and has two opposing first jaws ( 21 ), each having a first clamping piece ( 211 ). By squeezing the handle ( 1 ), the first clamping pieces ( 211 ). The second lever set ( 3 ) is with the handle ( 1 ) and has two opposing second jaws ( 31 ), each having a second clamping piece ( 311 ). By squeezing the handle ( 1 ), the second clamping pieces ( 311 ) getting closed. The first two clamping pieces ( 211 ) and second clamping pieces ( 311 ) each form a curved clamping surface ( 212 ) 312 ). The curved clamping surfaces ( 212 ) of the first clamping pieces ( 211 ) are turned away from each other. The curved clamping surface ( 312 ) of the second clamping pieces ( 311 ) are facing each other. The Curved clamping surfaces ( 212 ) 312 ) are arcuate. The curved clamping surfaces ( 212 ) 312 ) are further toothed (at the same point of the clamping surfaces ( 212 ) 312 )). Or the curved clamping surfaces ( 212 ) 312 ) are arcuate and toothed.

Hereinafter, the embodiment in the 1 to 3 described in detail. As shown, the pliers include a handle ( 1 ), a first lever set ( 2 ) and a second lever set ( 3 ). The handle ( 1 ) contains two handles ( 11 ), two fixing pins ( 12 ), a bolt ( 13 ) and a spring element ( 14 ). The two handles ( 11 ) each have an end ( 111 ) for the fixing pin ( 12 ) and are close to the fixing pins ( 12 ) over the bolt ( 13 ) hinged together. The spring element ( 14 ) has two ends ( 141 ) 142 ) and is between the two handles ( 11 ) arranged. The two ends ( 141 ) 142 ) are on the two handles ( 11 ) attached. The first lever set ( 2 ) contains a first left lever ( 22 ), a first right lever ( 23 ) and a first bolt ( 24 ). The first left lever ( 22 ) and the first right lever ( 23 ) form the opposing first jaws ( 21 ) out. The first left lever ( 22 ) and the first right lever ( 23 ) are above the first bolt ( 24 ) hinged together. Between the first jaws ( 21 ) and the first bolt ( 24 ) is a first mounting hole ( 25 ) intended. Through the first through holes ( 25 ) are the mounting pins ( 12 ) of the handle ( 1 ), whereby the first set of levers ( 2 ) on the handle ( 1 ) is attached. The first jaws ( 21 ) have the first clamping pieces ( 211 ), each having a curved clamping surface ( 212 ) form. The curved clamping surfaces ( 212 ) of the first clamping pieces ( 211 ) are turned away from each other. The second lever set ( 3 ) contains a second left lever ( 32 ), a second right lever ( 33 ) and a second bolt ( 34 ). The second left lever ( 32 ) and the second right lever ( 33 ) form the opposing second jaws ( 31 ) and each have a second jaw ( 31 ) opposite end ( 35 ) on. The second left lever ( 32 ) and the second right lever ( 33 ) are over the second bolt ( 34 ) hinged together. Between the opposite ends ( 35 ) and the second bolt ( 34 ) is a second mounting hole ( 36 ) intended. Through the second through holes ( 26 ) are the mounting pins ( 12 ) of the handle ( 1 ), whereby the second set of levers ( 3 ) on the handle ( 1 ) is attached. The second jaws ( 31 ) have the second clamping pieces ( 311 ), each having a curved clamping surface ( 312 ) form. The curved clamping surfaces ( 312 ) of the second clamping pieces ( 311 ) are facing each other.

The curved clamping surfaces ( 212 ) 312 ) are arcuate. The curved clamping surfaces ( 212 ) 312 ) are further toothed (at the same point of the clamping surfaces ( 212 ) 312 )). Or the curved clamping surfaces ( 212 ) 312 ) are arcuate and toothed.

At work, the first or second clamping pieces ( 211 ) 311 ) is inserted between the chain pins of the self-locking link plates. How out 2 can be seen, the handle ( 1 ) compressed in the direction of the arrow. The first two clamping pieces ( 211 ) are inserted from bottom to top between the chain pins of the self-locking link plates. The opposite curved clamping surfaces ( 212 ) are applied to the chain pin and are opened, whereby a chain pin is pressed from the opening into the recess. Therefore, the forceps according to the invention is suitable for mounting chain. When disassembling the chain, the two second clamping pieces ( 311 ) from top to bottom between the chain pins of the self-locking link plates inserted. The mutually facing curved clamping surfaces ( 312 ) are closed, whereby the chain pin is pressed by the latching recess in the opening, so that the link plates can be separated from each other.

How out 3 it can be seen that the second clamping pieces ( 311 ) from bottom to top between the chain pins of the self-locking link plates when the pliers are turned over.

4 and 5 show a further embodiment of the invention, which has a handle ( 1A ) and a lever set ( 2A ). The lever set ( 2A ) are on the handle ( 1A ) and combines the first lever set ( 2 ) and the second lever set ( 3 ) in the above embodiment. The lever set ( 2A ) has two opposing first jaws ( 21A ) and two opposing second jaws ( 22A ) on. The first jaws ( 21A ) each have a first clamping piece ( 211A ). The second jaws ( 22A ) each have a second clamping piece ( 221A ). By squeezing the handle ( 1A ), the first two clamping pieces ( 211A ) and the two second clamping pieces ( 221A ) closed. The first two clamping pieces ( 211A ) and the two second clamping pieces ( 221A ) each form a curved clamping surface ( 212A ) 222A ). The curved clamping surfaces ( 212A ) of the first two clamping pieces ( 211A ) are turned away from each other. The curved clamping surfaces ( 222A ) of the two second clamping pieces ( 212A ) are facing each other. The curved clamping surfaces ( 212A ) 222A ) are arcuate. The curved clamping surfaces ( 212A ) 222A ) are further toothed (at the same point of the clamping surfaces ( 212A ) 222A )). Or the curved clamping surfaces ( 212A ) 222A ) are arcuate and toothed.

At work, as is in 5 is shown, the handle ( 1A ) compressed in the direction of the arrow, wherein the two first clamping pieces ( 211A ) and the two second clamping pieces ( 221A ) are closed, as shown in the above embodiment.

6 shows yet another embodiment of the invention, which includes a handle ( 1B ) and two lever sets ( 2 B ) 3B ). The handle ( 1B ), the two sets of levers ( 2 B ) 3B ) with you. Each lever set ( 2 B ) [( 3B )] has two opposing first jaws ( 21B ) (the first jaws of the lever set ( 3B ) is covered) and two opposing second jaws ( 22B ) 32B ) on. The second jaws ( 22B ) 32B ) of the two lever sets ( 2 B ) are opposite each other (the first jaws of the two sets of levers are also opposite each other). The first jaws ( 21B ) each have a first clamping piece ( 211B ) having a curved clamping surface ( 212B ). The second jaws ( 22B ) 32B ) each have a second clamping piece ( 221B ) 321B ) having a curved clamping surface ( 222B ) 322B ). The curved clamping surfaces ( 212B ) of the first two clamping pieces ( 211B ) of the first jaws ( 21B ) of the lever set ( 2 B ) [and the lever set ( 3B )] are turned away from each other. The curved clamping surfaces ( 222B ) 322B ) of the two second clamping pieces ( 221B ) 321B ) of the second jaws ( 22B ) 32B ) of the lever sets ( 2 B ) 3B ) are facing each other.

The curved clamping surfaces ( 212B ) 312B ) 222B ) are arcuate. The curved clamping surfaces ( 212B ) 312B ) 222B ) are further toothed (at the same point of the clamping surfaces ( 212B ) 312B ) 222B )). Or the curved clamping surfaces ( 212B ) 312B ) 222B ) are arcuate and toothed.

At work, as is in 6 is shown, the handle ( 1B ) compressed in the direction of the arrow, wherein the two first clamping pieces ( 211B ) and the two second clamping pieces ( 221B ) 321B ) are closed, as shown in the above embodiment. The tongs can be turned over and converted at work.

In use, the user can use the handle to move the two sets of levers so that the chain can be assembled and disassembled by the same actuating movement, with the user only having to turn or turn the tongs accordingly.

When working, the curved clamping surfaces abut the chain pins, which prevents slipping. In addition, the user can use the same pliers to assemble and disassemble the chain.

LIST OF REFERENCE NUMBERS

1

handle

2

first lever set

3

second lever set

11

handle

12

fastening pin

13

bolt

14

spring element

111

The End

141

The End

142

The End

21

first jaw

211

first clamping piece

212

curved clamping surface

22

first left lever

23

first right lever

24

first bolt

25

first mounting hole

31

second jaw

311

second clamping piece

312

curved clamping surface

32

second left lever

33

second right lever

34

second bolt

35

opposite end

36

second mounting hole

1A

handle

2A

lever kit

21A

first jaw

211A

first clamping piece

212A

curved clamping surface

22A

second jaw

221A

second clamping piece

222A

curved clamping surface

1B

handle

2B, 3B

lever kit

21B

first jaw

211B

first clamping piece

212B

curved clamping surface

22B

second jaw

221B

second clamping piece

222B

curved clamping surface

32B

second jaw

321B

second clamping piece

322B

curved clamping surface

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 5291730 [0004]
• US 5362282 [0004]

Claims (9)

Pliers for mounting and dismounting a chain joint, comprising a handle ( 1 ), a first lever set ( 2 ) attached to the handle ( 1 ) and two opposing first jaws ( 21 ), each having a first clamping piece ( 211 ), wherein at least one of the first clamping pieces ( 211 ) a curved clamping surface ( 212 ), and wherein the first clamping pieces ( 211 ) by squeezing the handle ( 1 ), a second set of levers ( 3 ) attached to the handle ( 1 ) and two opposing second jaws ( 31 ), each having a second clamping piece ( 311 ), wherein at least one of the second clamping pieces ( 311 ) a curved clamping surface ( 312 ), and wherein the second clamping pieces ( 211 ) by squeezing the handle ( 1 ) getting closed. Pliers according to claim 1, characterized in that the two first clamping pieces ( 211 ) and the two second clamping pieces ( 311 ) each have a curved clamping surface ( 212 . 312 ), wherein the curved clamping surfaces ( 212 ) of the first clamping pieces ( 211 ) facing away from each other and the curved clamping surfaces ( 312 ) of the second clamping pieces ( 311 ) face each other. Pliers according to claim 1, characterized in that the handle ( 1 ) two handles ( 11 ), two fixing pins ( 12 ), a bolt ( 13 ) and a spring element ( 14 ), the two handles ( 11 ) one end each ( 111 ) for the fixing pin ( 12 ) and close to the fixing pins ( 12 ) over the bolt ( 13 ) are hinged together, wherein the spring element ( 14 ) two ends ( 141 . 142 ) and between the two handles ( 11 ) and the two ends ( 141 . 142 ) of the spring element on the two handles ( 11 ) are attached; the first lever set ( 2 ) a first left lever ( 22 ), a first right lever ( 23 ) and a first bolt ( 24 ), wherein the first left lever ( 22 ) and the first right lever ( 23 ) the opposing first jaws ( 21 ), wherein the first left lever ( 22 ) and the first right lever ( 23 ) over the first bolt ( 24 ) are hinged together, wherein between the first jaws ( 21 ) and the first bolt ( 24 ) each have a first mounting hole ( 25 ) is provided, wherein through the first through holes ( 25 ) the fixing pins ( 12 ) of the handle ( 1 ), whereby the first set of levers ( 2 ) on the handle ( 1 ), wherein the first jaws ( 21 ) the first clamping pieces ( 211 ), and wherein at least one of the first clamping pieces ( 211 ) a curved clamping surface ( 212 ) forms; and the second lever set ( 3 ) a second left lever ( 32 ), a second right lever ( 33 ) and a second bolt ( 34 ), the second left lever ( 32 ) and the second right lever ( 33 ) the opposing second jaws ( 31 ) and each one of the second jaw ( 31 ) opposite end ( 35 ), wherein the second left lever ( 32 ) and the second right lever ( 33 ) over the second bolt ( 34 ) are hinged together, wherein between the opposite ends ( 35 ) and the second bolt ( 34 ) each have a second mounting hole ( 36 ) is provided, wherein through the second through holes ( 26 ) the fixing pins ( 12 ) of the handle ( 1 ), whereby the second set of levers ( 3 ) on the handle ( 1 ), wherein the second jaws ( 31 ) the second clamping pieces ( 311 ), and wherein at least one of the second clamping pieces ( 311 ) a curved clamping surface ( 312 ). Pliers according to claim 3, characterized in that the two first clamping pieces ( 211 ) and the two second clamping pieces ( 311 ) each have a curved clamping surface ( 212 . 312 ), wherein the curved clamping surfaces ( 212 ) of the first clamping pieces ( 211 ) facing away from each other and the curved clamping surface ( 312 ) of the second clamping pieces ( 311 ) face each other. Pliers for mounting and dismounting a chain joint, comprising a handle ( 1A ), a lever set ( 2A ) attached to the handle ( 1A ) and two opposing first jaws ( 21A ) and two opposing second jaws ( 22A ), wherein the first jaws ( 21A ) each have a first clamping piece ( 211A ) and the second jaws ( 22A ) each have a second clamping piece ( 221A ), wherein the two first clamping pieces ( 211A ) and the two second clamping pieces ( 221A ) at least one curved clamping surface ( 212A . 222A ), and wherein by squeezing the handle ( 1A ) the first two clamping pieces ( 211A ) and the two second clamping pieces ( 221A ) getting closed. Pliers according to claim 5, characterized in that the two first clamping pieces ( 211A ) and the two second clamping pieces ( 221A ) each have a curved clamping surface ( 212A . 222A ), wherein the curved clamping surfaces ( 212A ) of the first two clamping pieces ( 211A ) facing away from each other and the curved clamping surfaces ( 222A ) of the two second clamping pieces ( 212A ) face each other. Pliers for assembly and disassembly of a chain link, which has a handle ( 1B ) and two lever sets ( 2 B . 3B ), wherein the handle ( 1B ) the two lever sets ( 2 B . 3B ), each set of levers ( 2 B . 3B ) two opposing first jaws ( 21B ) and two opposing second jaws ( 22B . 32B ), wherein between the first jaws ( 21B ) and the second jaw ( 22B . 32B ) is provided, wherein the first jaws ( 21B ) each have a first clamping piece ( 211B ) and the second jaws ( 22B ) 32B ) each have a second clamping piece ( 221B . 321B ), wherein the two first clamping pieces ( 211B ) at least one curved clamping surface ( 212B ) and the two second clamping pieces ( 221B . 321B ) at least one curved clamping surface ( 222B . 322B ) form. Pliers according to claim 7, characterized in that the two first clamping pieces ( 211B ) of the first jaws ( 21B ) and the two second clamping pieces ( 221B . 321B ) of the second jaws ( 22B . 32B ) each have a curved clamping surface ( 212B ; 222B . 322B ), wherein the curved clamping surfaces ( 212B ) of the first two clamping pieces ( 211B ) facing away from each other and the curved clamping surfaces ( 222B . 322B ) of the two second clamping pieces ( 221B . 321B ) face each other. Pliers according to one of claims 1 to 8, characterized in that the curved clamping surfaces ( 212 . 312 . 212A . 222A . 212B . 222B . 322B ) are arcuate or toothed or arcuate and toothed.

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