JPH0560774U - Split pin bending tool - Google Patents

Abstract

(57) [Summary] [Purpose] The cotter pin bending tool is very simple, reliable, efficient, and quick when mounting the cotter pin on the shaft, and a practically simple cotter pin bending tool that requires a small working space. To provide. [Structure] An outer cylinder 21 for gripping having a holding pin 25 at the tip which can be inserted into and engaged with a proximal end loop portion 12a of a split pin 12 inserted into a shaft 11, and can be reciprocally rotated in the outer cylinder 21. The rotary operation body 22 is provided with a sharp bending blade 30 projecting from the left and right pin portions 12b and 12c of the split pin 12, which is inserted into the distal end of the rotary pin 22.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a split pin bending tool used to prevent a shaft from coming off.

[0002]

[Prior Art]

 Generally, in many cases, a cylinder used for a movable mechanism such as a brake device of an automobile or the like has a base end pivotally attached to a shaft so as to be swingable. Split pins are attached to these shafts to prevent them from slipping out.

FIG. 4 shows a method of attaching the cotter pin 1 of this type to the shaft 2. First, the worker inserts the split pin 1 into the pin hole 2a of the shaft 2, prepares two pliers (pliers) 3 and 4 there and holds them with both hands. The base end loop portion 1a is sandwiched and held, and in this state, the tip left and right pin portions 1b and 1c of the split pin 1 are sandwiched one by one by the other pliers 4 and bent to the left and right. Thus, the split pin 1 is attached to the pin hole 2a of the shaft 2 so as not to fall out. That is, the bending work for attaching the split pin 1 to the shaft was performed using the two pliers 3, 4.

[0004]

[Problems to be solved by the device]

 By the way, as described above, holding the two pliers 3 and 4 in both hands, while holding the proximal end loop portion 1a of the split pin 1 with one of the pliers 3, the other pliers 4 holds the end pin left and right pin of the split pin 1. The work of pushing out the parts 1b and 1c one by one is tedious and inefficient, and it takes a lot of time even for a fairly skilled person. Further, since two pliers 3 and 4 are used, there is a problem that a large work space is required.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to perform a bending work when attaching a split pin to a shaft very easily, reliably, efficiently, and quickly, and at the same time, perform the work. It is intended to provide a practical split pin bending tool that requires a small space.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the split pin bending tool of the present invention has a gripping outer cylinder having a holding pin at the tip that can be inserted into and engaged with the proximal loop portion of the split pin inserted in the shaft. Split pin bending, which includes a rotary operation body that is inserted into the outer cylinder so as to be capable of reciprocating rotary operation and has a sharp bending blade projecting at the tip between the left and right pin ends of the split pin. tool.

[0007]

[Action]

 Using the split pin bending tool having the above-mentioned configuration, an operator inserts the retaining pin at the tip of the gripping outer cylinder into the proximal loop portion of the split pin inserted into the pin hole of the shaft, and engages the split pin around the split pin. Hold and hold the outer cylinder with one hand in this state, while slightly turning it with the other hand, push the sharp bending blade at the tip between the left and right pins at the tip of the split pin. Then, the left and right pin portions of the split pin open to the left and right, and in this state, the sharp operating blade is rotated left and right with respect to the gripping outer cylinder, so that the sharp bending blade causes the split pin tip left and right pin to move. Bend each part to the left and right. This allows the split pin to be bent and attached so that it does not fall off the shaft.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS.

First, as shown in FIG. 1, a pin hole 11 b is formed in the radial direction near the end of the shaft 11. The bending tool 20 for the split pin 12 inserted into the hole 11b is composed of a gripping outer cylinder 21 and a cylindrical rotation operating body 22 inserted in the outer cylinder 21 so as to be reciprocally rotatable. Has been done.

The gripping outer cylinder 21 has a short and thick cylindrical shape, and a round rod-shaped holding pin 25 having a small diameter is projectingly provided at one position in the circumferential direction at the tip thereof, and the holding pin 25 is inserted into the shaft 11. The base end loop portion 12a of the pin 12 can be inserted and engaged. Further, a notch step portion 26 is provided at the tip of the gripping outer cylinder 21 over substantially the half circumference on the side opposite to the holding pin 25. Further, a brim-shaped flange portion 27 is provided at the base end of the gripping outer cylinder 21.

On the other hand, the rotating operation body 22 has a cylindrical shape having a larger diameter than the shaft 11 but a smaller diameter than the gripping outer cylinder 21, and is rotatably penetrated into the outer cylinder 21. Has been. A sharp bending blade 30 is fixedly projected by welding or the like at one position in the circumferential direction of the tip.

The sharp bending blade 30 is composed of a small piece having a pointed tip in a mountain shape, and is configured to be able to be pressed between the left and right pinned portions 12 b and 12 c of the tip of the split pin 12. The sharp bending blade 30 has a wide width that protrudes to the outer periphery of the rotating operation body 22 so that the rotating operation body 22 does not fall downward from the gripping outer cylinder 21 and the gripping outer cylinder 21 is prevented. The range of rotation is restricted by the notch step portion 26. A bar-shaped handle 31 is welded and fixed to the base end edge of the rotating operation body 22.

According to the split pin bending tool thus configured, the worker holds the tip of the gripping outer cylinder 21 in the proximal end loop portion 12a of the split pin 12 inserted into the pin hole 11b of the shaft 11. The pin 25 is inserted and engaged, and as shown in FIG. 2 (a), the split pin 12 is held by stopping rotation. Next, in this state, while holding the outer cylinder 21 with one hand, hold the handle 31 of the rotating operation body 22 with the other hand and slightly move it to the proximal end side to move the sharp bending blade 30 of the split pin 12 into place. The tip left and right pin portions 15b and 15c are aligned with each other. Then, in this state, the handle 31 of the rotating operation body 22 is pushed toward the tip side to move the sharp bending blade 30 between the left and right pin portions 15b and 15c at the tip of the split pin 12 as shown in FIGS. 2 (b) and 3. Press into. Then, the left and right pin portions 15b and 15c of the split pin 12 open to the left and right, and in this state, as shown in FIGS. 2 (c) and 2 (d), the turning operation body 22 is moved to the left and right with respect to the gripping outer cylinder 21. When it is turned to, the sharp bending blade 30 pushes the tip left and right pin portions 15b and 15c of the split pin 12 left and right one by one. With this, the split pin 12 can be bent and attached so as not to fall off the shaft 11. When performing cotter pin bending on a shaft with a large shaft diameter, various cotter pin bending tools of large size may be prepared.

[0014]

[Effect of the device]

 Since the present invention is constructed as described above, the cotter pin can be bent very easily, securely, efficiently and efficiently when it is attached to the shaft, and the cotter pin is practically easy to use because it requires a small working space. Bending tools can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a split pin bending tool of the present invention.

2 (a), (b), (c) and (d) are explanatory views of the action of the split pin bending tool of the above-described embodiment.

FIG. 3 is a sectional view of the shaft and the rotating operation body in a fitted state in the embodiment.

FIG. 4 is a perspective view showing a conventional method of attaching a split pin.

[Explanation of symbols]

11 ... Shaft, 12 ... Split pin, 12a ... Base end loop portion, 1
2b, 12c ... Tip left and right pin portions, 21 ... Grip outer cylinder, 2
2 ... Rotating operation body, 25 ... Holding pin, 30 ... Sharp bending blade.

Claims (1)

[Scope of utility model registration request] 1. A gripping outer cylinder having a holding pin at its tip that can be inserted into and engaged with a proximal end loop portion of a split pin inserted in a shaft, and a reciprocatingly rotatably fitted insertion end inserted in the outer cylinder. A split pin bending tool, comprising: a rotating operation body provided with a sharp bending blade projecting between the left and right pin portions of the tip of the split pin.