DE102021200806B3 - Riveter - Google Patents

Abstract

The invention relates to a rivet remover (1) for removing a rivet from a chain consisting of links riveted together, the rivet remover (1) comprising the following:- a shaft (2) which is mounted in a guide (3), the shaft ( 2) is connected to the guide (3) by means of a thread or a thread-like cam track (4), so that rotating the shaft (2) in the guide (3) causes an axial displacement of the shaft (2) in the guide (3). , wherein the shaft (2) has a centered, axial bore with an internal thread, into which a screw (7) provided with an external thread can be screwed or is screwed, with one end of the screw (7) located inside the shaft (2) having a axially centered mandrel (9) for driving out the rivet, - a counter-holder (16) immovable relative to the guide (3) for supporting the chain against a force exerted by the mandrel (9) on the rivet.

Description

The invention relates to a rivet remover for removing a rivet from a chain consisting of links riveted together, for example a bicycle chain, a motorcycle chain, a saw chain or the like.

the DE 42 23 098 A1 discloses a riveter for bicycle chains with a frame, with at least one support for the link plate, with at least one centering component for positioning the chain pin to be pressed and with at least one pressing tool for pressing the chain pin, the support and the pressing tool being arranged on opposite free legs of the frame are, the centering component being mounted on the frame so as to be displaceable relative to the support.

the U.S. 1,000,867A discloses an apparatus for removing rivets from chains, comprising: a head shaped to receive links of a chain and a rivet connecting the links, a moveable part carried by said head and operable to remove the rivet remove, and a removable handle for the latter part, this handle forming a punch for final removal of the rivet.

the U.S. 2,622,389 A discloses a sprocket chain cutting tool comprising a block member having a slot, a longitudinal rib in said slot, located between the side walls of the slot and defining a seat adapted to receive a sprocket chain, said rib being formed with a transverse slot adapted to receive a roller of this chain, a tubular traverse guide member supported by the block member on one side thereof and aligned with this transverse slot, a cranked shaft screwed into this tubular guide member, a pin member carried by the end of the cranked shaft and extending axially into the bore of this guide member, this pin member being adapted to strike the end of the rivet contained in this chain roller as a result of rotation of the cranked shaft, thereby the rivet can be forced out of the chain, a transverse arm that is in the same transverse plane as the this transverse slot is pivoted on said block member and adapted to sometimes overlie said transverse slot, said arm being formed with corresponding recesses for receiving said roller and side links of the chain, a locking arm pivoted on said tubular guide member and cam means on said locking arm lockingly engaging said cross-arm when said cross-arm overlies said cross-slot.

the DE 33 27 881 A1 discloses a device for pressing and riveting tabs onto pins of a chain, comprising a support with a lateral abutment for a section of the chain and a pressure member spaced opposite the lateral abutment with a bracket for a tab that can be brought into effect selectively, by means of which the Tab is to be pressed over a predetermined amount up to a stop on at least one bolt, and a rivet head to be brought into effect selectively to this holder for riveting the at least one bolt.

the EP 0 636 459 A1 discloses a tool for removing and inserting link pins from and into joints connecting adjacent links of a chain. The chain components are positioned in a working area where they are supported against plastic deformation while a punch mounted on a moveable support is used to remove or insert a link pin. An angle pin creates an angle between the chain components so that the free outer link plate at a joint is supported against plastic deformation, preferably by contact with its adjacent inner link plate. A retaining element helps to keep the chain components in the operating range. An orientation post receivable between the outer tabs on a joint ensures that the joint can only be positioned in one orientation at the operative field and the jaw width of the operative field ensures that a joint can only be positioned in one location. A storage recess with a removable cap can be used to store a spare link pin or rivet for a chain.

the DE 20 2004 008 143 U1 discloses a device for removing a connecting element of two chain links, comprising: a receiving body which is provided with a recess in which a chain can be received; a threaded bolt which can be extended and retracted in the receiving body, being provided at its first end with a rotary lever and at its second end with a receiving hole; a depressible mandrel rotatably mounted in the receiving bore of the threaded bolt; a locking member located in an opening of the receiving bore of the stud bolt, thereby preventing the pushable mandrel from detaching from the stud bolt; and a support screw threaded into the receiving body and aligned with the depressible mandrel, the depressible mandrel having a threaded portion threadable into an internal thread of the locking member to locate the threaded portion within the receiving bore of the threaded bolt, thereby enabling replacement of an unusable Dorns is executable.

the DE 10 2009 017 024 A1 discloses a roller chain opening and closing tool that can be used to attach the chain to a sprocket and can accommodate the workload at two locations. A first block has a pressure actuator screwed into it and a connector fixed to it. A second block is rotatably connected to the first block via the connecting member and includes a counterbore on one side and a through hole on the other. The tool is fitted to the chain with a hole and a boss on the end of a threaded bolt screwed into the first block can engage the countersunk or through hole.

the DE 20 2010 000 021 U1 discloses an apparatus for mounting and demounting a bicycle chain, comprising: a mounting seat provided at both ends thereof with a threaded hole and a mounting hole, a mounting space for accommodating chains being provided between the threaded hole and the mounting hole; an actuator screwable into the threaded hole; a mounting member having a through hole, wherein a mounting portion is disposed in the vicinity of one end portion of the through hole, and wherein an annular flange is provided inside the other end portion of the through hole; a rod member slidably disposed in the through hole of the mounting member, the rod member being provided at its one end with a guide portion located in the through hole or the mounting space, and at its other end with a guide portion protruding from the through hole end portion is provided, and wherein a stop portion is formed between the end portion and the guide portion; a spring fittable to the rod member, both ends of the spring abutting against the abutment portion of the rod member and the annular flange of the mounting member, respectively; and a pulling member that is fittable to the end portion of the rod member and abuts against the outer portion of the through hole of the mounting member.

The invention is based on the object of specifying an improved rivet remover for removing a rivet from a chain consisting of links riveted together.

The object is achieved according to the invention by a riveter with the features of claim 1.

Advantageous configurations of the invention are the subject matter of the dependent claims.

• - eine Welle, die in einer Führung gelagert ist, wobei die Welle mittels eines Gewindes oder einer gewindeartigen Nockenbahn mit der Führung verbunden ist, so dass ein Verdrehen der Welle in der Führung eine Axialverschiebung der Welle in der Führung bewirkt, wobei die Welle eine zentrierte, axiale Bohrung mit einem Innengewinde aufweist, in die eine mit einem Außengewinde versehene Schraube einschraubbar oder eingeschraubt ist, wobei ein innerhalb der Welle befindliches Ende der Schraube mit einem axial zentriert angebrachten Dorn zum Austreiben des Niets versehen ist,
• - ein relativ zur Führung unbewegliche angebrachter Gegenhalter zum Abstützen der Kette entgegen einer vom Dorn auf den Niet ausgeübten Kraft.

A rivet remover according to the invention for removing a rivet from a chain consisting of links riveted together comprises:

• - a shaft which is mounted in a guide, the shaft being connected to the guide by means of a thread or a thread-like cam track, such that twisting of the shaft in the guide causes an axial displacement of the shaft in the guide, the shaft having a centred , has an axial bore with an internal thread, into which a screw provided with an external thread can be screwed or is screwed, wherein an end of the screw located inside the shaft is provided with an axially centered mandrel for driving out the rivet,
• - A counter-holder, immovable relative to the guide, for supporting the chain against a force exerted by the mandrel on the rivet.

A zero position of the mandrel can be set by means of the screw fitted in the shaft, for example to minimize an idle stroke of the shaft and the mandrel for chains with different geometries.

In one embodiment, a lock nut is provided, by means of which the screw can be fixed in the shaft. In this way, the screw can be secured in the zero position so that it cannot be misaligned.

In one embodiment, the pitch of the thread or the cam track is designed in such a way that when the shaft is rotated between two stops, the shaft and the mandrel perform a stroke of at least approximately 6 mm to 14 mm, preferably 8 mm to 12 mm, for example at least 10 mm .

In one embodiment, a rotation angle of the shaft between the two stops is limited to a maximum of 200°.

In one embodiment, the shaft is provided with a lever for rotating the shaft.

In one embodiment, a tooth profile for positioning the chain is arranged between the guide and the counter-holder.

According to the invention, a counter with a chain wheel is provided in one possible direction of travel of a chain guided between the guide and the counter-holder, which is configured to count the links of the chain guided over the chain wheel. In this way, cutting a chain to length can be simplified considerably.

In one embodiment, a pair of chain guide rollers is/are provided in front of and/or behind the chain wheel in a possible direction of travel of the chain. In this way, the chain can be more reliably guided over the counter sprocket, so that counting errors do not occur or are less likely to occur.

In one embodiment, a bearing block is provided, to which at least the guide and the counter-holder are fastened, or these are designed in one piece with the bearing block.

According to one aspect of the present invention there is provided an assembly comprising a work table with a riveter as described above arranged thereon, the riveter being slidably arranged on the work table in the axial direction of the shaft, with one or more coils in a frame of the work table below the riveter are held, on each of which a chain is held as running goods.

Exemplary embodiments of the invention are explained in more detail below with reference to drawings.

• 1 eine schematische Ansicht eines Entnieters für eine aus miteinander vernieteten Gliedern bestehenden Kette,
• 2 eine weitere schematische Ansicht des Entnieters,
• 3 eine schematische Ansicht einer Welle,
• 4 eine schematische Ansicht eines Abstandshalters, und
• 5 eine schematische Ansicht eines Werktischs mit einem darauf angeordneten Entnieter.

Show in it:

• 1 a schematic view of a rivet remover for a chain consisting of links riveted together,
• 2 another schematic view of the riveter,
• 3 a schematic view of a shaft,
• 4 a schematic view of a spacer, and
• 5 a schematic view of a workbench with a rivet remover arranged thereon.

Corresponding parts are provided with the same reference symbols in all figures.

the 1 and 2 show various schematic views of a rivet remover 1 for a chain consisting of links riveted together, for example a bicycle chain, a motorcycle chain, a saw chain or the like.

The rivet remover 1 comprises a shaft 2 which is rotatably and axially displaceably mounted in a guide 3 . 3 is a schematic view of the shaft 2. The shaft 2 has at least one cam track 4, in which a respective cam 5 provided in the guide 3 engages. The cam 5 can be designed as a pin inserted radially into the guide 3 . The cam track 4 can be designed like a thread in the form of a helix, so that rotating the shaft 2 in the guide 3 causes an axial displacement of the shaft 2 in the guide 3 . The shaft 2 is provided with a lever 6 at one end protruding from the guide 3, which can be attached radially to the axial direction of the shaft 2, for example. For example, the lever 6 can be held in a bore running radially through the shaft 2 . The shaft 2 is also provided with a centered, axial bore, which can also run through the lever 6. The lever 6 can be provided with a handle 14 at an end opposite the shaft 2 for better handling. The lever 6 can have a length of 20 cm to 25 cm, for example.

The bore has an internal thread into which a screw 7 provided with an external thread can be screwed or is screwed. In particular, the screw 7 is screwed into the end of the shaft 2 provided with the lever 6 and has a lock nut 8 by means of which the screw 7 can be fixed in the shaft 2 . One end of the screw 7 located within the shaft 2 is provided with a mandrel 9 which is held axially centered in the screw 7 or is attached axially to the screw 7, the diameter of which is selected to match the riveting of a respective chain. For example, the diameter of the mandrel 9 is slightly smaller than the diameter of a rivet in the chain. The guide 3 can be attached to a bearing block 10 or formed in one piece with a bearing block 10 . The bearing block 10 can be used to fasten the rivet remover 1 to a workbench 11 . For this purpose, the bearing block 10 can have a flange 12 that is vertical in the position of use and a flange 13 that is horizontal in the position of use. The horizontal flange 13 is used for attachment to the workbench 11 and can have holes for screws for this purpose. The vertical flange 12 can be used to attach the guide 3, among other things. The mandrel 9 is led out through an opening in the guide 3 and optionally out of the vertical flange 12 of the bearing block 10 .

On a side of the vertical flange 12 opposite the guide 3, at a distance from the vertical flange 12 in the axial direction of the shaft, a tooth profile 15 can be provided, the tooth spacing of which is selected to match a spacing of the links of the chain from which a rivet is to be removed. For example, the tooth profile 15 can have four teeth, so that two links of the chain can be held on either side of the rivet to be removed. Several interchangeable tooth profiles 15 with different tooth spacings can be provided for different chains.

Furthermore, a counter-holder 16 can be provided at a distance from the tooth profile 15 in the axial direction of the shaft, on which the chain is supported when the mandrel 9 exerts a force on the rivet. It For example, a U-shaped notch 18 may be provided in the anvil 16 which is axially aligned with the mandrel 9 to allow the rivet to exit the chain on the side opposite the mandrel 9. The counter-holder 16 can be screwed to the guide 3 by means of at least one screw 17, preferably at least two screws 17, on the vertical flange 12 or through bores in the vertical flange 12. The screws 17 can each be guided through a spacer sleeve 30 between the counter-holder 16 and the vertical flange 12 . For example, both screws 17 can be arranged at the same height in the position of use. The tooth profile 15 can have holes through which the spacer sleeves 30 are guided with play.

Another spacer 19 can be provided in the position of use below the spacer sleeves 30 between the counter-holder 16 and the vertical flange 12, so that the counter-holder 16 is supported at three points on the vertical flange 12, which can be thought of as the corner points of an equilateral triangle whose Base points upwards when in use. 4 12 is a schematic view of the spacer 19. The spacer 19 may have a cylindrical first portion 31 with a first diameter and a cylindrical second portion 32 with a larger second diameter. The first section 31 is guided with play through a hole in the tooth profile 15 and allows movement of the tooth profile 15 in the direction of the counter-holder 16. The second section serves as a stop for the tooth profile 15 in the direction of the vertical flange 12. Between the tooth profile 15 and the Counterholder 16 can be a spring, for example a helical spring, arranged on the first section 31 in order to press the toothed profile 15 against the stop. A certain movement of the tooth profile 15 is made possible by the play between the bores in the tooth profile 15 and the spacer sleeves 30 and the spacer 19 .

Furthermore, a counter 20 with a chain wheel 21 can be provided on the vertical flange 12 in a possible direction of extension of a chain held in the tooth profile 15, which counter is configured for counting the links of the chain. The counter 20 can have a reset device 29 with which it can be set to zero. Several interchangeable sprockets 21 with different tooth spacings can be provided for different chains. The counter 20 can be designed as a mechanical counter or as an electronic counter. Furthermore, the counter 20 can be set to different tooth spacings.

Furthermore, a pair of chain guide rollers 22 can be provided in front of and/or behind the chain wheel 21 in a possible direction of the chain. The chain guide rollers 22 of each pair are each dimensioned and spaced apart so that the chain is guided with as little play as possible between them. Several sets of interchangeable chain guide rollers 22 with different dimensions for different chains can be provided. One of the pairs of chain guide rollers 22 may be arranged in front of the sprocket 21 in the direction of chain travel and the other pair may be arranged after the sprocket 21 in the direction of travel of the chain so that the chain is securely guided over the sprocket 21 between the pairs.

Furthermore, a stop 23 for the lever 6 can be provided on the bearing block 10, which is designed in such a way that, when the rivet tool 1 is mounted on a workbench 11, the lever 6 comes to rest on the stop 23, in particular in the direction of the counter 20, such that a sufficient distance between the lever 6 and the workbench 11 remains to grasp the handle 14 comfortably. For example, the stop 23 can be arranged in such a way that the lever 6 is at least approximately horizontal in the position of use. A further stop for the lever 6 in the opposite direction can be formed by an end 33 of the cam track 4 which abuts the cam 5 . A rotation angle of the shaft 2 between the two stops can be limited to a maximum of 200°, for example. The pitch of the thread-like cam track 4 can be designed in such a way that when the shaft 2 rotates between the two stops, the shaft 2 and thus also the mandrel 9 perform a stroke of about 10 mm. For wider chains, such as motorcycle chains, a larger gradient and thus a larger stroke can be provided. Furthermore, the cam track 4 can have, on its side opposite the end 33, a section 34 running in the axial direction, which makes it easier to insert the shaft 2 into the guide 3 when the cam 5 is already inserted there. When the guide 3 is fastened to the bearing block 10 with the inserted shaft 2 , the stop 23 can prevent the cam 5 from entering the section 34 so that the shaft 2 cannot fall out of the guide 3 .

5 is a schematic view of a workbench 11 with a riveter 1 arranged thereon than the counter 20. It can be provided that the riveter is arranged on the workbench 11 so that it can be displaced parallel to the front edge, for example by means of a rail (not shown). Under the plate 25, one or more reels or coils 26 can be held in a frame 27 of the workbench 11 on which a or several chains, in particular chains with different widths and/or tooth spacings, can be kept as running goods. In the plate 25 of the workbench 11, a slot-like opening 28 running in particular parallel to the front edge 24 can be provided for the passage of a chain from the spool 26 to the riveter 1.

To cut a chain to length, the riveter 1 is moved parallel to the front edge 24 in such a way that the desired chain can be guided on the respective spool 26 with little or no lateral offset through the chain guide rollers 22 and via the chain wheel 21 onto the toothed profile 15. The lever 6 is preferably in contact with the stop 23 . As soon as the first link of the chain lies on the tooth profile 15, the reset device 29 of the counter 20 can be actuated in order to set the counter to zero. The chain is then lifted off the tooth profile 15 and pulled out until the counter 20 has counted the desired number of links. In this position, the chain is placed back on the tooth profile 15.

The screw 7 in the shaft 2 can be turned after loosening the lock nut 8 in order to set a zero position of the mandrel 9, for example so that the free end of the mandrel 9 is as close as possible to the chain when it is in contact with the counter-holder 16. In this way, the idle stroke of the mandrel 9 can be reduced.

By moving the lever 6 away from the stop 23, the shaft 2 is rotated in the guide 3 and performs a stroke together with the mandrel 9, as a result of which a rivet aligned with the mandrel 9 is pressed out of the chain. The chain cut to length in this way can be removed and mounted at the place of use, for example on a bicycle or motorcycle. Provision can also be made, for example for a saw chain, to adjust the zero position of the mandrel 9 in such a way that a rivet can be pressed in to connect two links of the chain.

Reference List

1

Riveter

2

Wave

3

guide

4

cam track

5

cam

6

lever

7

screw

8th

locknut

9

mandrel

10

bearing block

11

workbench

12

vertical flange

13

horizontal flange

14

Handle

15

tooth profile

16

counter holder

17

screw

18

recess

19

spacers

20

counter

21

Sprocket

22

chain guide roller

23

attack

24

front edge

25

plate

26

Kitchen sink

27

frame

28

opening

29

reset

30

spacer sleeve

31

first section

32

second part

33

End

34

section

Claims (9)

Riveting tool (1) for removing a rivet from a chain consisting of links riveted together, the riveting tool (1) comprising: - a shaft (2) which is mounted in a guide (3), the shaft (2) being supported by a Thread or a thread-like cam track (4) is connected to the guide (3), so that rotating the shaft (2) in the guide (3) causes an axial displacement of the shaft (2) in the guide (3), the shaft (2) has a centered, axial bore with an internal thread into which an externally threaded screw (7) can be screwed or screwed, an end of the screw (7) located inside the shaft (2) having an axially centered attached mandrel (9) for driving out the rivet, - a counter-holder (16) immovably mounted relative to the guide (3) for supporting the chain against a force exerted on the rivet by the mandrel (9), characterized in that in a possible direction of travel e iner between the guide (3) and the counter-holder (16) guided chain Counter (20) is provided with a sprocket (21), which is configured to count the sprocket (21) guided links of the chain. Riveter (1) after claim 1 , wherein a lock nut (8) is provided, by means of which the screw (7) in the shaft (2) can be fixed. Riveter (1) after claim 1 or 2 , wherein a pitch of the thread or the cam track (4) is designed such that when the shaft (2) rotates between two stops, the shaft (2) and the mandrel (9) perform a stroke of at least about 10 mm. Riveter (1) after claim 3 , wherein a rotation angle of the shaft (2) between the two stops is limited to a maximum of 200°. Riveter (1) according to any one of the preceding claims, in which the shaft (2) is provided with a lever (6) for rotating the shaft. Riveter (1) according to one of the preceding claims, wherein a tooth profile (15) for positioning the chain is arranged between the guide (3) and the counter-holder (16). Riveting tool (1) according to one of the preceding claims, wherein a pair of chain guide rollers (22) is/are provided in front of and/or behind the chain wheel (21) in a possible direction of travel of the chain. Riveting tool (1) according to one of the preceding claims, comprising a bearing block (10) to which at least the guide (3) and the counter-holder (16) are fastened or with which these are formed in one piece. Arrangement comprising a work table (11) with a riveter (1) according to one of the preceding claims arranged thereon, wherein the riveter (1) is arranged on the work table (11) so as to be displaceable in the axial direction of the shaft (2), with below the riveter ( 1) one or more bobbins (26) are held in a frame (27) of the workbench (11), on each of which a chain is held as running goods.

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