JPH063569U - Cutting jig for chain cutting device - Google Patents

Abstract

(57) [Abstract] [Purpose] A cutting jig for a device for cutting a roller chain, in which the roller chain hanging on the cutting jig is stable in a fixed position, and also for hanging and removing the roller chain. Providing easy cutting jigs. [Arrangement] An arc-shaped tooth type jig having a plurality of teeth protruding on the outer periphery is fixed to a holder, and a receiving piece is formed in the center of the holder leaving a slight gap with the arc-shaped tooth type, and the receiving piece is It is provided through the hole through which the pin to be extracted passes.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cutting jig of a cutting device used for cutting a chain.

[0002]

[Prior art]

 The roller chain is wound around both sprockets arranged at a predetermined distance to transmit power, but the roller chain forms an endless body having a predetermined circumference. Therefore, the roller chain manufactured as a long product needs to be cut to a required length, and conventionally, a screw type or hydraulic type cutting device has been used for cutting the chain. The cutting jig for attaching to the device to hold the roller chain and cutting it is a rack type jig in which teeth with predetermined intervals are linearly arranged, and is held by the rack type jig. The roller chain is straight and the roller chain removed from the jig is free.

FIG. 4 shows a jig of a conventional cutting device, and a rack type jig (b) is attached to a holder (a). A plurality of teeth (c), (c), ... project above the rack-type jig (b), and a receiving piece (d) is above the holder (a) with the rack-type jig (b). Two holes (e) and (e) penetrate through the receiving piece (d), leaving a gap between them. Then, a moving jig (f) is provided at a predetermined distance from the rack type jig (b), and the moving jig (f) has the same positions as the holes (e) and (e). Two pressing pins (g) and (g) project in parallel.

The roller chain is hung on the rack type jig (b) and is held by hanging down from both ends thereof, and the moving jig (f) advances to push pins (to) and (to). Pulls out the roller chain pin. The receiving piece (d) receives the pulling force of the pin as a support of the roller chain, and the pin passes through the holes (e) and (e) and is extracted. By the way, when the pressing pins (g) and (g) press the pin of the roller chain, the component force of the withdrawal force acts and the teeth of the jig are arranged in a straight line, so this component force must be received. It was not possible to use the weight of the hanging part of the roller chain when it was placed horizontally and it could not be used as a tension, which hindered the cutting work. It Therefore, it is necessary to separately provide a pressing means for pressing and stabilizing the roller chain hanging on the rack type jig (b) from above, which complicates the cutting device itself.

[0005]

[Problems to be solved by the present invention]

 As described above, the conventional chain cutting device has the above problems. The problems to be solved by the present invention are these problems, and provide a cutting jig that is stable in a fixed position only by hanging without using a special holding means and that can easily remove a cut chain. .

[0006]

[Means for Solving the Problems]

 The chain cutting jig of the present invention is not a conventional straight tooth (rack type) jig but an arc tooth (pinion type) jig, and the roller chain is positioned on the jig. The teeth for projecting protrude, and the roller chain is suspended in an arc. The arc-shaped tooth jig is fixed to the holder as in the conventional case, and the receiving piece having two holes formed in the center of the holder projects upward. Therefore, the roller chain hung on the arcuate tooth type jig receives the pulling force at the tooth-shaped contact surface, and the weight of the hanging portion acts as a tension of the chain, so that the hanging roller chain is hung on the jig. It becomes a force to adhere to the roller chain and stabilizes the roller chain. Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

[0007]

【Example】

 FIG. 1 is an embodiment showing a cutting jig of a chain cutting device according to the present invention, and FIG. 1 shows an arcuate tooth type jig, 2 is a holder, and 3 is a receiving piece. A plurality of teeth 4, 4, ... Are projected on the outer periphery of the arcuate tooth type jig 1, and are bolted to the holder 2. The holder 2 is smaller than the tooth bottoms 5, 5, ... And has a size that does not contact the holder when the roller chain is hooked on the arcuate tooth type jig 1. The receiving piece 3 projects in the center of the holder 2, and the receiving piece 3 leaves a small gap for hanging the roller chain between the teeth 4, 4, ... The two holes 6 and 6 are penetrating at the same distance as the pitch. Further, similarly to the conventional device, the pressing pins 7 and 7 are provided with the moving jig 8 projecting.

FIG. 2 shows a concrete example of a chain cutting device to which a cutting jig is attached. However, the driving means of the moving jig 8 is not limited, and a roller chain using hydraulic pressure, air pressure, or a motor as a driving source. Remove the pin. FIG. 3 shows a state in which the roller chain 9 is hung on the cutting jig of the present invention. The roller chain 9 is wrapped around the arcuate tooth type jig 1 and hangs down from both sides thereof, and a reaction force corresponding to the component force of the extracting force and a tension P corresponding to the weight of the hanging portion act on the roller chain 9. The resultant force Q of the tensions P on both sides serves as a force for pressing the roller chain 9 against the arcuate tooth type jig 1, and the roller chain 9 is stably suspended in a fixed position.

The cut portion of the roller chain 9 is hung across the central tooth 4 and the pins 10 and 10 located on both sides of the central tooth 4 are pressed and pulled out. In this case, due to the action of the tension P, the pins 10 and 10 of the roller chain 9 are set at fixed positions, the rear surface side is supported by the receiving piece 3, and the pins 10 and 10 penetrate the holes 6 and 6 and are withdrawn. As described above, the cutting jig of the present invention uses an arcuate tooth type jig instead of the conventional rack type jig, and the following effects can be obtained.

[0010]

[Effect of device]

 The cutting jig of the present invention is constructed by attaching an arcuate tooth type jig to a holder, and the roller chain suspended on the arcuate tooth type jig is stabilized at a fixed position. That is, the roller chain hanging on the circular tooth-shaped jig acts as a reaction force due to the extraction force and the force of the weight of both hanging parts sticking to the arc-shaped tooth, and the center tooth of the arc-shaped tooth jig is The pins that are sandwiched do not float apart from the arcuate tooth type jig, and therefore the cutting operation is facilitated. Further, the roller chain does not become dubbed just by hanging it on the arcuate tooth jig due to the gravitational force of the hanging portion, and it is easy to remove the roller chain cut from the arc tooth jig.

[Brief description of drawings]

FIG. 1 is an embodiment showing a cutting jig of the present invention.

FIG. 2 is a chain cutting device to which a cutting jig is attached.

FIG. 3 is a force acting on a roller chain hanging on a cutting jig.

FIG. 4 is a conventional rack-type cutting jig.

[Explanation of symbols]

 1 arcuate tooth type jig 2 holder 3 receiving piece 4 teeth 5 tooth bottom 6 hole 7 pressing pin 8 moving jig 9 roller chain 10 pin P tension Q resultant force

Claims (1)

[Scope of utility model registration request] 1. A jig having teeth formed at predetermined intervals and a receiving jig having two through holes at the center of the jig, leaving a slight gap required for mounting a chain. A fixing jig that protrudes upward and fixes each jig to the holder,
On the opposite side of the fixing jig, in a chain cutting device composed of a moving jig in which two pressing pins that enter the through hole are arranged in parallel by a screw, air pressure, hydraulic pressure, etc. A cutting jig for a chain cutting device, which is an arc jig.