JPS6153195B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a splitting pin tool that is used for assembly work and the like, and is used to open the distal end of the splitting pin after it has been inserted.

When opening a warp pin that is normally inserted into a pin hole,
The circular part of the warp pin on the insertion side is grasped on a bench or the like, and the center part of the pin on the opening side is pushed open with the tip of a screwdriver or the like having a sharp tip to finish it to a predetermined size and angle. However, according to this method, the opening angles may be uneven, and furthermore, depending on the assembly location, the work may be carried out in an impossible condition, which poses safety problems. Moreover, even though it is a simple task of passing the pin through and opening it, it takes an extremely large amount of time, which makes this type of operation inefficient.

SUMMARY OF THE INVENTION An object of the present invention is to provide a tool for splitting pins that can quickly position and open the opening side of a splitting pin inserted into the pin, thereby improving work efficiency and safety.

An embodiment illustrating the present invention will be described below. In FIG. 1, holes 9a for attaching a pair of pins 9 are machined on both sides of the tip 2d of the main body 2, and the pair of claws 1 are rotatably supported by the pins 9. It is installed symmetrically with respect to 2. The pair of claws 1 are each inserted into a space 2a machined inside the main body 2, and a spring 5 is applied between the tip 1f of the arm 1l and the inner surface of the space 2a, and the pair of claws Apply force so that 1 closes evenly on both sides. Further, a hole 1d is formed in the center of the claw 1, through which the pin 9 passes. Furthermore, the left sides of the pair of claws 1 in the figure are both curved inward, and the inner ends 1a are ground so as to form an acute angle when the left and right claws are assembled. Further, a shoulder portion 1c is provided on the inside of the pair of claws 1 so that the width is narrow at the tip, that is, the left side in the drawing, and the outer corner thereof is formed into a curved shape. Furthermore, the outer end 1b is also curved so that parts to be assembled can be easily inserted therein. On the other hand, a pair of grasping handles 4 are rotatably attached to the rear part of the main body 2 by pins 11 and holes 4d, respectively. The grasping handle 4 has a supporting projecting edge 4 in its center.
form a. A supporting groove 4b is machined in the protruding edge 4a along the lateral direction in the figure, and one end of the left and right links 6 is rotatably attached by a pin 12 that traverses the groove 4b. The other ends of the pair of left and right links 6 are rotatably connected to one end of the guide rod 3 by a pin 3l. This guide rod 3
passes through the center groove 2e of the main body 2 in a freely sliding manner along the axial direction, and its tips protrude inside the pair of claws 1. A guide portion 3a is provided at this projecting end. As shown in FIG. 2, this guide part 3a is for attaching a pin 14 which is passed through a split pin 15, and has a concave surface 3d that joins the outer periphery of the pin 14 and a head part 15a of the split pin 15 that fits into the inner surface. A positioning groove 3b for detecting the direction of the split pin 15 is machined. Further, the outer end portion 3c comes into contact with the shoulder portion 1c in the claw 1 to push the pair of claws 1 apart, and is formed into a curved shape. In addition, the grasping handle 4
A spring receiver 8 is inserted into the groove 4b via a pin 13.
are provided respectively, and a spring 7 is interposed between them. The opposing gripping handle 4 is therefore subjected to a restoring force by the spring 7. Further, reference numeral 14 is a back cover, which is fixed to the back side of the main body 2 with screws 10.

Next, the operation of the present invention will be explained. Figure 2a
The warp pin 15 inserted into the pin 14 in the state of
The split pin 15 is positioned by inserting the head 15a of the guide rod 3 into the positioning groove 3b formed in the tip guide portion 3a of the guide rod 3. By grasping the grasping handle 4 in this state, the guide rod 3 is moved in the direction of the arrow 16 as shown in FIG. 2b. As a result, the pin 14 is pushed, and the tip of the split pin 15 is pushed out by the inner end 1a of the claw 1. When the grasping handle 4 is further grasped, the guide rod 3 continues to move in the direction of the arrow 16, and as shown in FIG. are in contact with each other, and due to the pressing force, the pair of claws 1
Expand it to the left and right. At this time, the split pins 15 are expanded as shown in the figure following the movement, and are opened to a predetermined opening angle.

The present invention is not limited to the above-mentioned manual grasping operation, but can also be opened using an air cylinder, and the claw 1 and the guide section 3a at the tip can be replaced to match the diameter of the pin 14 used. You can work safely by adjusting the handle length according to the location.

Since the present invention is configured as described above, it is possible to greatly simplify the work procedure for warping the tip of the warp pin, significantly shorten the time required for this, and greatly improve work efficiency and safety.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view showing an embodiment of a tool for splitting pins according to the present invention, and FIGS. 2 a, b, and c are partial views illustrating the operation of the device of the present invention. 1...Claw, 2...Main body, 3...Guide rod, 3a
... Guide portion, 3b ... Positioning groove, 3d ... Concave surface, 3c ... Outer end portion, 4 ... Gripping handle, 5
... Spring, 6 ... Link mechanism, 14 ... Pin, 15 ... Warp pin, 15a ... Head.

Claims (1)

[Claims] 1. A pair of claws that are attached to one end of the main body so as to be openable and closable, and whose tips are curved inward to form an acute-angled inner end, and a spring that normally biases the pair of claws into a closed state; A positioning groove for fitting the head of the split pin is provided at a position located in the inner space between the pair of claws and facing the acute-angled inner end portion, and a recess is provided for receiving the outer periphery of the pin into which the split pin is inserted. a pair of gripping handles provided on the other end of the main body so as to be openable and closable; one end of the gripping handle is connected to the gripping handle via a link mechanism, and the other end is connected to the guide portion for gripping. a guide rod that moves the guide portion toward the acute-angled inner end portion through a link mechanism when the handle is closed; A split pin tool with an outer end that comes into contact with the inside and pushes it open.