JP7297159B2 - Spring pin attachment/detachment jig and spring pin attachment/detachment method - Google Patents

Description

The present invention relates to a spring pin attaching/detaching jig and a spring pin attaching/detaching method for removing a spring pin.

A spring pin is a fixture that is fitted into through-holes passing through a plurality of works to fix the works together. The spring pin fixes the angle adjustment lever and the connecting shaft in, for example, an escalator emergency braking device. When replacing the emergency braking device, it is necessary to remove the spring pin and remove the angle adjustment lever from the connecting shaft.

Conventionally, a spring pin is removed by applying a pin punch to the end of the spring pin and hitting the head of the pin punch with a hammer to push out the spring pin. However, it was difficult to remove the spring pin because the hammer easily came off the pin punch. In addition, when the pin punch is displaced from the spring pin due to the impact of the hammer, the spring pin cannot be removed.

Spring pin removal jigs for removing spring pins are also known. For example, Patent Literature 1 discloses a spring pin attachment/detachment jig in which a bolt is screwed to push out a push rod, and the push rod further pushes out a spring pin.

JP 2012-16765 A

However, in the operation of removing the spring pin disclosed in Patent Document 1, it is necessary to turn the bolt until the push rod pushes out the spring pin, resulting in poor work efficiency. Moreover, it takes time to turn the bolt, and the spring pin cannot be removed in a short period of time.

SUMMARY OF THE INVENTION An object of the present invention is to provide a spring pin attaching/detaching jig and a spring pin attaching/detaching method capable of efficiently removing a spring pin in a short time.

A spring pin attachment/detachment jig according to the present invention is a spring pin attachment/detachment jig for pulling out a spring pin fitted in a through hole of a work from one side to the other side, wherein the spring pin is pulled from one side to the inner hole of the spring pin. A pull-out shaft inserted through and having a head portion with a maximum diameter that is larger than the diameter of the inner hole of the spring pin and smaller than the diameter of the through hole of the work; It is characterized by comprising a spacer on the other side of the spring pin through which the pull-out shaft is inserted into the receiving hole, and a riveter on the other side of the spacer that pulls out the pull-out shaft from one side to the other side.

A spring pin attaching/detaching method according to the present invention is a spring pin attaching/detaching method in which a spring pin fitted in a through hole of a work is pulled out from one side to the other side, and the spring pin has a diameter larger than the inner hole of the spring pin and penetrates the work. A stripped shaft having a head with a maximum diameter smaller than the diameter of the hole is inserted from one side of the spring pin into the inner hole of the spring pin, and a receiving hole with a diameter larger than the outer diameter of the spring pin is formed on the other side of the spring pin. The pull-out shaft is inserted into the housing hole of the spacer, and the pull-out shaft is pulled out from one side toward the other side by a riveter on the other side of the spacer.

According to the spring pin attaching/detaching jig and the spring pin attaching/detaching method according to the present invention, the spring pin can be removed efficiently in a short time.

1 is a front view showing an emergency braking device, for example an escalator, in which spring pins are used; FIG. It is a side view which shows the spring pin attachment/detachment jig|tool which is an example of this embodiment. FIG. 5 is a side view showing a pull shaft as another example of the present embodiment; It is a schematic diagram which shows the removal procedure of the spring pin using the spring pin attachment/detachment jig|tool which is an example of this embodiment. It is a schematic diagram which shows the attachment procedure of the spring pin using the spring pin attachment/detachment jig|tool which is an example of this embodiment.

Embodiments of the present invention will be described below with reference to the drawings. The shapes, materials, and numbers described below are examples, and can be changed as appropriate according to the specifications of the spring pin attachment/detachment jig. In the following description, the same reference numerals are assigned to the same elements in all the drawings.

An escalator emergency braking device 90 using a spring pin SP will be described with reference to FIG. FIG. 1 is a front view showing an emergency braking device 90 for an escalator. FIG. 1 also shows an enlarged side view of the spring pin SP that fixes the connecting shaft 93 and the angle adjusting lever 94 .

The emergency braking device 90 is supported by a connecting shaft 93 rotatably supported by a bracket 92 fixed to a brake beam 91, a shoe lever 95 provided at one end of the connecting shaft 93, and a shoe lever 95. , a shoe 96 placed on the drive chain C of the escalator, and a shoe 96 provided at the other end of the connecting shaft 93. When the connecting shaft 93 rotates, the engagement position engages with the ratchet wheel (not shown) and the release from the ratchet wheel. and a ratchet pawl 97 that displaces between positions. The angle adjusting lever 94 adjusts the angle of the shoe lever 95 and is attached to the shoe lever 95 with a bolt or the like.

According to the emergency braking device 90 , when the drive chain C breaks, the shoe 96 is lowered by its own weight, and the shoe lever 95 rotates about the connecting shaft 93 . As a result, the connecting shaft 93 rotates and the ratchet pawl 97 is displaced from the released position to the engaged position. As a result, the rotation of the ratchet wheel is stopped and the rotation of the main shaft of the escalator, on which the steps circulate, is prevented from rotating.

When replacing the emergency braking device 90 , it is necessary to remove the angle adjusting lever 94 from the connecting shaft 93 . In order to remove the angle adjusting lever 94, the spring pin SP that fixes the connecting shaft 93 and the angle adjusting lever 94 is removed using the attachment/detachment jig 10 described later.

Hereinafter, for convenience, the connecting shaft 93 and the angle adjusting lever 94 are collectively referred to as a work W, and the through hole 93A of the connecting shaft 93 and the through hole 94A of the angle adjusting lever 94 are collectively referred to as a through hole WH.

The attachment/detachment jig 10 will be described with reference to FIG. FIG. 2 is a side view showing the attachment/detachment jig 10. FIG.

Hereinafter, the direction in which the spring pin SP is pulled out is defined as the axial direction, the side into which the pull-out shaft 20 is inserted in the axial direction is defined as one side, and the side in which the spring pin SP and the pull-out shaft 20 are pulled out is defined as the other side. Also, the spring pin SP is formed in a substantially cylindrical shape having an inner hole, has an outer diameter slightly larger than that of the through hole WH, and is press-fitted into the through hole WH.

The attaching/detaching jig 10 is for attaching/detaching a spring pin SP that fits into a through hole WH penetrating the work W. As shown in FIG. According to the attachment/detachment jig 10, the spring pin SP can be pulled out from the through hole WH of the work W efficiently in a short time using the hand riveter 40. - 特許庁Similarly, according to the attachment/detachment jig 10, the spring pin SP can be efficiently pushed into the through hole WH of the work W in a short time.

The attachment/detachment jig 10 includes a pull-out shaft 20 inserted through the inner hole of the spring pin SP from one side of the spring pin SP, a spacer 30 through which the pull-out shaft 20 is inserted on the other side of the spring pin SP, and the pull-out shaft 20. A hand riveter 40 is provided as a riveter for pulling out from one side toward the other side.

The pull-out shaft 20 is a member pulled out by the hand riveter 40 . In the attachment/detachment jig 10 , the pull-out shaft 20 is pulled out by the hand riveter 40 , so that the spring pin SP is pulled out from the through hole WH of the work W together with the pull-out shaft 20 . The pull-out shaft 20 is preferably made of metal having rigidity equal to or greater than that of the spring pin SP. The pull-out shaft 20 has a rod-shaped shaft portion 20P and a head portion 20H formed on one side of the shaft portion 20P.

The shaft portion 20P is a portion that is inserted through the inner hole of the spring pin SP and is a portion that is inserted into the insertion hole 42H of the nosepiece 42 of the hand riveter 40 . The diameter of the shaft portion 20P is formed smaller than the diameter of the inner hole of the spring pin SP. The length of the shaft portion 20P is formed longer than the sum of the lengths of the spring pin SP, the spacer 30 and the nosepiece 42 of the hand riveter 40. As shown in FIG.

The head 20H is a portion that engages with one end of the spring pin SP when the spring pin SP is pulled out. More specifically, when the spring pin SP is pulled out, the surface of the head portion 20H on the side (the other side) from which the shaft portion 20P extends presses one end surface of the spring pin SP. The maximum diameter of the head 20H is smaller than the diameter of the through hole WH of the work W and larger than the diameter of the inner hole of the spring pin SP. The head 20H is preferably circular when viewed from the axial direction, but is not particularly limited. For example, it may be hexagonal or quadrangular when viewed from the axial direction, as long as it has a shape that engages with one end of the spring pin SP when the spring pin SP is pulled out.

The spacer 30 is a cylindrical member that accommodates the spring pin SP pulled out by the pull-out shaft 20 . The spacer 30 is inserted through the inner hole of the spring pin SP on the other side of the spring pin SP, and the shaft portion 20P of the extraction shaft 20 extending to the other side of the spring pin SP is inserted therethrough. The spacer 30 has an accommodation hole 30H extending therethrough in the axial direction. The receiving hole 30H is larger than the outer diameter of the spring pin SP and larger than the maximum diameter of the head portion 20H of the shaft 20. As shown in FIG. The axial length of the spacer 30 is preferably greater than the axial length of the spring pin SP.

For example, a pair of claw portions may be formed on one end side of the spacer 30 . When the spacer 30 comes into contact with the other end surface of the workpiece W, the pair of claws are arranged in a direction orthogonal to the axial direction (for example, in the case of the angle adjusting lever 94, the width direction of the angle adjusting lever 94). It may be anything as long as it engages with both end surfaces. Thereby, the movement of the spacer 30 in the direction orthogonal to the axial direction can be fixed with respect to the workpiece W, and the workability can be improved.

In this embodiment, both ends of the spring pin SP protrude from both end faces of the workpiece W, respectively. Therefore, one side of the receiving hole 30H of the spacer 30 may be engaged with the other end of the protruding spring pin SP. Similarly, the nosepiece 42 of the hand riveter 40 may be engaged with the other side of the receiving hole 30H of the spacer 30.

The hand riveter 40 is a manual tool for pulling out the pull-out shaft 20 . Generally, the hand riveter 40 is a manual tool for riveting with rivets (blind rivets). According to the hand riveter 40, the spring pin SP fitted in the through hole WH of the workpiece W can be pulled out by pulling out the pull-out shaft 20 in the same manner as pulling out the rivet. The riveter is preferably a hand riveter 40 as in this embodiment, but may be an electric riveter or an air riveter.

The hand riveter 40 has a main body 41 tapered downward, a nosepiece 42 into which the other side of the shaft portion 20P of the pull-out shaft 20 is inserted, and a lever 43 closed toward the main body 41 . The main body 41 includes a tip portion 41A protruding to one side of the upper end portion and a grip portion 41B formed at the lower portion.

The nosepiece 42 is detachably attached to the distal end portion 41A and has an insertion hole 42H into which the other side of the shaft portion 20P of the pull-out shaft 20 is inserted. Lever 43 includes a grip portion 43B formed at the bottom. A gripping portion 41B of the main body 41 and a gripping portion 43B of the lever 43 constitute a handle 44, and the pull-out shaft 20 inserted into the insertion hole 42H of the nosepiece 42 is pulled out by the opening/closing operation of the handle 44.

A plurality of nosepieces 42 are attached to the central portion of one side of the main body 41 . The diameters of the insertion holes 42H of the plurality of nosepieces 42 are different. The nosepiece 42 attached to the distal end portion 41A of the main body 41 is selected to have an insertion hole 42H with a diameter slightly larger than the diameter of the shaft portion 20P of the pull-out shaft 20. As shown in FIG.

A pull shaft 20, which is another example of the present embodiment, will be described with reference to FIG. FIG. 3 shows a side view of the pull-out shaft 20. As shown in FIG.

As shown in FIG. 3, the shaft portion 20P of the pull-out shaft 20 may have a bent portion 20C formed by bending. It is preferable that the bent portion 20C is formed so as to abut on the inner hole of the spring pin SP in at least two places. Moreover, it is preferable that the bent portion 20C is formed in the vicinity of the head portion 20H. With this configuration, when the pull-out shaft 20 is inserted through the inner hole of the spring pin SP, the bent portion 20C fits into the inner hole of the spring pin SP. It is preferable that the bent portion 20C can be manually removed by an operator when fitted into the inner hole of the spring pin SP.

As a result, after the spring pin SP is removed from the through hole WH of the work W by the attachment/detachment jig 10 or before the spring pin SP is attached from the through hole WH of the work W by the attachment/detachment jig 10, the shaft is removed from the spring pin SP. 20 becomes difficult to fall off. As a result, it is possible to improve the workability of attaching and detaching the spring pin SP.

A procedure for removing the spring pin SP using the attachment/detachment jig 10 will be described with reference to FIGS. 4(A) to 4(C).

As shown in FIG. 4A, first, the operator inserts the pull-out shaft 20 from one side of the work W into the inner hole of the spring pin SP. Then, the head portion 20H of the pull-out shaft 20 is brought into contact with one end surface of the spring pin SP, and the other side of the shaft portion 20P of the pull-out shaft 20 extends from the other side of the spring pin SP. Next, the operator inserts the spacer 30 into the shaft portion 20P extending from the other side of the spring pin SP. At this time, one side of the receiving hole 30H of the spacer 30 may be engaged with the other end of the spring pin SP protruding from the workpiece W.

As shown in FIG. 4B, the operator inserts the extraction shaft 20 extending from the other side of the spacer 30 into the insertion hole 42H of the nosepiece 42 of the hand riveter 40, and tightens the nosepiece 42. As shown in FIG. At this time, the nosepiece 42 of the hand riveter 40 may be engaged with the other side of the accommodation hole 30H of the spacer 30. As shown in FIG. Then, the operator closes the handle 44 of the hand riveter 40 and pulls out the pull-out shaft 20 from one side to the other side. When the pull-out shaft 20 is pulled out, the spring pin SP is pulled out from the through hole WH of the work W together with the pull-out shaft 20 .

As shown in FIG. 4C, the operator opens and closes the handle 44 of the hand riveter 40 to further pull out the pull-out shaft 20 and the spring pin SP from one side to the other side. The spring pin SP completely pulled out from the through hole WH of the work W is accommodated in the accommodation hole 30H of the spacer 30 . Then, the hand riveter 40 is pulled out from the pull-out shaft 20, the pull-out shaft 20 is pulled out from the spring pin SP, and the spring pin SP is recovered from the spacer 30. - 特許庁

A procedure for attaching the spring pin SP using the attachment/detachment jig 10 will be described with reference to FIGS. 5(A) and 5(B).

As shown in FIG. 5A, first, the operator inserts the pull shaft 20 into the inner hole of the spring pin SP so that the spring pin SP contacts the head portion 20H of the pull shaft 20 . In this state, one side of the pull-out shaft 20 is inserted into the through hole WH from one side of the work W, and the other side of the spring pin SP is engaged with one side of the through hole WH.

As shown in FIG. 5B, the operator inserts the extraction shaft 20 extending from the other side of the work W into the insertion hole 42H of the nosepiece 42 of the hand riveter 40, and closes the handle 44 of the hand riveter 40. , the pull-out shaft 20 is pulled out from one side to the other side. Then, the spring pin SP is pushed into the through hole WH of the work W and fitted into the through hole WH of the work W. Then, the pull shaft 20 is pulled out from the hand riveter 40, the pull shaft 20 is pulled out from the spring pin SP, and the spring pin SP is attached to the work W.

According to the attachment/detachment jig 10, the spring pin SP can be removed from the through hole WH of the work W efficiently in a short time by using the function of the hand riveter 40 to pull out the rivet. In addition, the spring pin SP can be efficiently attached to the through hole WH of the work W in a short time by using the function of the hand riveter 40 to pull out the rivet.

Further, according to the attachment/detachment jig 10, the spring pin SP can be prevented from dropping by accommodating the spring pin SP in the spacer 30 after pulling it out from the through hole WH of the work W. Thereby, workability can be improved.

Furthermore, since the attachment/detachment jig 10 is composed of the hand riveter 40, which is often used in maintenance and inspection work, and the pull-out shaft 20 and the spacer 30 of simple shape, it can be manufactured inexpensively and easily.

The present invention is not limited to the above-described embodiments and modifications thereof, and various improvements and modifications may be made within the scope of the claims of the present application.

10 detachment jig 20 extraction shaft 20C convex portion 20H head portion 20P shaft portion 30 spacer 30H accommodation hole 40 hand riveter 41 main body 41A tip portion 41B grip portion 42 nosepiece 42H hole 43 lever, 43B gripping part, 44 handle, 90 emergency braking device, 91 emergency braking device beam, 92 bracket, 93 connecting shaft, 93A through hole, 94A through hole, 94 angle adjustment lever, 95 shoe lever, 96 ratchet pole, SP Spring pin, W Work, WH Through hole

Claims (2)

A spring pin attaching/detaching jig for pulling out a spring pin fitted in a through hole of a work piece from one side to the other side,
A pull-out shaft inserted from one side of the spring pin into the inner hole of the spring pin and having a head portion with a maximum diameter larger than the diameter of the inner hole of the spring pin and smaller than the diameter of the through hole of the work. and,
a spacer having an accommodation hole with a diameter larger than the outer diameter of the spring pin;
a riveter that pulls out the pull-out shaft from one side toward the other side on the other side of the spacer;
with
On the other side of the spring pin, the pull-out shaft is inserted through the accommodation hole from one side to the other side of the spacer.
Spring pin attachment/detachment jig. A spring pin attaching/detaching method for pulling out a spring pin fitted in a through hole of a work piece from one side to the other side,
A pull shaft having a head portion with a maximum diameter larger than the diameter of the inner hole of the spring pin and smaller than the diameter of the through hole of the work is inserted from one side of the spring pin into the inner hole of the spring pin. ,
inserting the pull-out shaft from one side to the other side of the spacer into a receiving hole of a spacer having a receiving hole having a diameter larger than the outer diameter of the spring pin on the other side of the spring pin ;
pulling out the pull-out shaft from one side toward the other side by a riveter on the other side of the spacer;
Spring pin detachment method.

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