JP2011121149A - Shaft pin mounting tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shaft pin mounting tool capable of easily fitting a shaft pin such as a C-shaped stopper ring to a predetermined shaft even under the narrow working circumstance. <P>SOLUTION: This shaft pin mounting tool for fitting a shaft pin to a shaft includes: a fixed part 1; a mounting part 2 formed to be freely detachably attached to the fixed part 1 in one end thereof and freely engageable with an end of a shaft in the other end thereof; a first lever 4 fixed to the fixed part 1 in one end thereof; an extruding part 3 capable of moving along the fixed part 1 so that the other end of the mounting part 2 approaches and separates from the shaft when the other end of the mounting part 2 is engaged with the end of the shaft; and a second lever 5 connected to the extruding part 3 in one end thereof and turnably provided in an intermediate part of the first lever 4 in an intermediate part thereof. When the other end of the second lever 5 approaches the other end of the first lever 4, the extruding part 3 presses the shaft pin arranged in a peripheral part of the mounting part 2 so that the shaft pin is extruded from the other end side of the mounting part 2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a shaft pin mounting tool for mounting a shaft pin such as a C-shaped retaining ring to a predetermined shaft.

Patent Document 1 below proposes an apparatus for attaching a shaft pin such as a C-shaped retaining ring to a predetermined shaft.
Specifically, in this apparatus, the shaft pin provided on the outer periphery of the mounting guide shaft is pressed by a cylindrical outer cylinder, so that the shaft pin is pushed out from one side of the mounting guide shaft and attached to the shaft. Yes.

JP-A-11-300645

  The thing of patent document 1 considers also automation of mounting | wearing of a shaft pin (refer FIG. 3 etc. of the cited reference 1), and if an outer cylinder press mechanism etc. are included, an apparatus will enlarge. However, the mounting operation of the shaft pin is not performed only in a place where the working environment is maintained as described above, and there is a problem that the method described in Patent Document 1 cannot be used in a narrow working environment. It was.

  The present invention has been made to solve the above-described problems, and its object is to easily attach a shaft pin such as a C-shaped retaining ring to a predetermined shaft even in a narrow work environment. It is to provide a shaft pin mounting tool capable of

  The shaft pin mounting tool according to the present invention is a shaft pin mounting tool for mounting a shaft pin such as a C-shaped retaining ring to a predetermined shaft, and a fixed portion and one end portion are provided detachably on the fixed portion, A mounting portion whose other end can be engaged with the end of the shaft, a first lever whose one end is fixed to the fixed portion, and a shaft when the other end of the mounting portion is engaged with the end of the shaft. An extruding part movable along the fixed part so as to approach and separate, a second lever having one end connected to the extruding part, and an intermediate part pivotally provided at an intermediate part of the first lever; And the pushing portion presses the shaft pin disposed on the outer peripheral portion of the mounting portion when the other end portion of the second lever approaches the other end portion of the first lever, so that the shaft pin is attached to the mounting portion. It extrudes from the other end side.

  According to the present invention, a shaft pin such as a C-shaped retaining ring can be easily attached to a predetermined shaft even in a narrow working environment.

It is a front view which shows the shaft pin mounting tool in Embodiment 1 of this invention. It is a front view of the mounting part shown in FIG. It is a front view of the fixing | fixed part shown in FIG. It is a figure which shows the state which attached the mounting part and the fixing | fixed part. It is a front view of the extrusion part shown in FIG. It is a side view of the extrusion part shown in FIG. It is a bottom view of the extrusion part shown in FIG. It is a figure for demonstrating the usage method of the shaft pin mounting tool in Embodiment 1 of this invention. It is a figure for demonstrating the usage method of the shaft pin mounting tool in Embodiment 1 of this invention.

  In order to explain the present invention in more detail, it will be described with reference to the accompanying drawings. In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, The duplication description is simplified or abbreviate | omitted suitably.

Embodiment 1 FIG.
FIG. 1 is a front view showing a shaft pin mounting tool according to Embodiment 1 of the present invention. This shaft pin mounting tool is for mounting a shaft pin C such as a C-shaped retaining ring on a predetermined shaft. The main part of the shaft pin mounting tool is constituted by the fixing portion 1, the mounting portion 2, the pushing portion 3, the first lever 4, and the second lever 5.

2 is a front view of the mounting portion shown in FIG. 1, FIG. 3 is a front view of the fixing portion shown in FIG. 1, FIG. 4 is a view showing a state in which the mounting portion and the fixing portion are attached, and FIG. FIG. 6 is a front view of the extrusion unit, FIG. 6 is a side view of the extrusion unit shown in FIG. 1, and FIG. 7 is a bottom view of the extrusion unit shown in FIG.
Hereinafter, the configuration of the spindle pin mounting tool will be specifically described with reference to FIGS. 1 to 7.

  The fixing portion 1 has a cylindrical (or column) shape, and a female screw 1a is formed on the inner surface of one end thereof. Reference numeral 1b denotes a support portion for supporting the first lever 4, and is provided on one end side of the fixed portion 1 so as to protrude from the outer peripheral surface. Reference numeral 1 c denotes guide grooves formed on both sides of the fixed portion 1 in order to guide the extruded portion 3. The guide groove 1c is formed on the outer peripheral surface of the fixing portion 1 along the axial direction thereof up to a predetermined position close to the female screw 1a while opening on the other end side of the fixing portion 1.

  The mounting portion 2 has a cylindrical (or columnar) shape as a whole, and an external thread 2a corresponding to the female thread 1a is formed at one end thereof. That is, the mounting portion 2 is configured such that one end thereof is detachably attached to one end of the fixing portion 1. The other end of the mounting portion 2 has a predetermined structure that can be engaged with the end of the shaft to which the shaft pin C is attached. In what is shown in the present embodiment, the end surface of the other end portion of the mounting portion 2 is formed with a recess 2b into which the end portion of the shaft is fitted.

  The mounting portion 2 has a function of holding the shaft pin C and appropriately expanding the inner diameter of the shaft pin C at the time of mounting. Specifically, the mounting portion 2 has one end (that is, the male screw 2a side) having a diameter smaller than the inner diameter of the shaft pin C, and when the mounting portion 2 is removed from the fixed portion 1, The shaft pin C is configured so as to be disposed on the outer peripheral portion from one end side of the mounting portion 2. Further, the other end of the mounting portion 2 (that is, the recess 2b side) has a diameter slightly larger than the inner diameter of the shaft pin C, and further, the diameter gradually increases from the other end to the intermediate portion. A taper portion 2c that becomes smaller is formed.

  The extruded portion 3 has a cylindrical shape, and the fixed portion 1 is disposed in the hollow portion. The pushing portion 3 is configured to be movable in the axial direction with respect to the fixed portion 1, so that when the other end portion of the mounting portion 2 is engaged with the end portion of the shaft, the pushing portion 3 approaches and separates from the shaft. , Move along the fixed part 1. 3a is a support part for supporting the 2nd lever 5, and is provided in the one end part side of the extrusion part 3 so that it may protrude from an outer peripheral surface.

  Reference numerals 3 b denote guide portions provided on both sides of the extrusion portion 3. The guide portion 3 b is provided so as to protrude from the inner surface of the extruded portion 3 (into the hollow portion), and is disposed in the guide groove 1 c of the fixed portion 1. That is, a guide mechanism for guiding the movement of the pushing portion 3 is configured by the guide groove 1 c of the fixed portion 1 and the guide portion 3 b of the pushing portion 3. In this guide mechanism, a groove corresponding to the guide groove 1c may be provided in the pushing portion 3, and a guide corresponding to the guide portion 3b may be provided in the fixed portion 1.

  Further, the extruding part 3 configured to be movable with respect to the fixed part 1 is provided with a notch part 3c for avoiding contact with the support part 1b. Specifically, the cutout portion 3c is a groove having a width slightly larger than that of the support portion 1b, opens to the other end portion side of the extrusion portion 3, and is located at a predetermined position close to the support portion 3a from the other end portion. Until it is formed along the axial direction of the extruded portion 3.

The first lever 4 and the second lever 5 are portions that are gripped and operated by an operator when the shaft pin C is mounted.
Specifically, one end portion of the first lever 4 is fixed to the support portion 1b of the fixing portion 1 by welding, a screw, or the like, and the length thereof is perpendicular to the side of the fixing portion 1, that is, the axial direction of the fixing portion 1. It is arranged in the direction to do.

  Further, one end of the second lever 5 is connected to the support portion 3 a of the push-out portion 3, and an intermediate portion is rotatably provided at an intermediate portion of the first lever 4. This 2nd lever 5 is for operating the movement with respect to the fixing | fixed part 1 of the extrusion part 3. As shown in FIG. For this reason, the 2nd lever 5 is connected with the support part 3a, for example via the pin 5a provided in the one end part so that the extrusion part 3 may interlock | cooperate smoothly with respect to the lever operation. In other words, the support portion 3a is formed with an arc-shaped hole 3d centering on the rotation center of the first lever 4 and the second lever 5, and the pin 5a of the second lever 5 is in the hole 3d. Is connected to the support portion 3a so as to be movable.

Next, the operation of attaching the shaft pin C to the shaft using the shaft pin mounting tool having the above configuration will be specifically described with reference to FIGS. 8 and 9 are views for explaining a method of using the shaft pin mounting tool according to the first embodiment of the present invention.
8 and 9, 6 is a step shaft used in a man conveyor such as an escalator, and 6a is a mounting groove formed at the end of the step shaft 6 (for the configuration of the step shaft 6, for example, see Japanese Patent Laid-Open No. 2008-290806 publication etc.).

  When the shaft pin C is attached to the end portion of the step shaft 6 using the shaft pin mounting tool having the above configuration, the operator attaches the shaft pin C to the outer peripheral portion of the tapered portion 2c of the mounting portion 2 in advance by the above-described procedure. Install it. That is, the worker first removes the mounting portion 2 from the fixing portion 1. Next, the shaft pin C is disposed on the outer peripheral portion of the tapered portion 2c from the other end side of the mounting portion 2, and the mounting portion 2 is reattached to the fixing portion 1 in the state as it is.

  After the shaft pin C is held on the mounting portion 2 by the above procedure, the operator holds the first lever 4 and the second lever 5 so that the other end of the mounting portion 2 faces the end surface of the step shaft 6. Then, the entire tool is moved in the axial direction of the step shaft 6 so that the end of the step shaft 6 is fitted into the recess 2b, and the step shaft 6, the mounting portion 2, and the fixing portion 1 (extruding portion 3) are aligned. Deploy.

Next, the operator pushes the first lever 4 and the second lever 5 firmly with the end portion of the step shaft 6 in the recess 2b, and pushes the shaft pin C in the mounting portion 2 in the axial direction while expanding it. And fit into the mounting groove 6a.
That is, when the operator firmly grips the first lever 4 and the second lever 5, the second lever 5 rotates in the direction A, and one end of the second lever 5 is moved to one end of the first lever 4, The other end of the second lever 5 approaches the other end of the first lever 4. Then, in conjunction with the rotation of the second lever 5, the pushing portion 3 moves in the B direction.

  When the other end of the pushing portion 3 reaches the position of the shaft pin C by the above movement, the pushing portion 3 presses the shaft pin C toward the step shaft 6 at its end face. Note that, as described above, the diameter of the tapered portion 2c of the mounting portion 2 increases toward the other end portion of the mounting portion 2. For this reason, after passing a predetermined position of the taper portion 2c (that is, a position where the diameter of the mounting portion 2 matches the inner diameter of the shaft pin C), the shaft pin C is gradually pushed out by the outer peripheral surface of the taper portion 2c. It moves in the direction B while being. The shaft pin C is fully opened when it reaches the other end of the mounting portion 2. Then, the shaft pin C is pushed from the other end side of the mounting portion 2 by further moving the pushing portion 3 in the B direction from the state, and is fitted into the mounting groove 6 a of the step shaft 6.

  By using the shaft pin mounting tool having the above configuration, the shaft pin C can be easily attached to a predetermined shaft even in a narrow work environment such as when the shaft pin C is attached to the step shaft 6 of the man conveyor. Will be able to.

That is, with the shaft pin mounting tool having the above-described configuration, the distance L shown in FIG. 1 can be reduced, and the portion arranged in a straight line with the shaft when the shaft pin C is mounted can be greatly reduced in size. It becomes. In a narrow work environment, the distance between the end face of the shaft on which the shaft pin C is mounted and other obstacles often becomes a problem. It can be used in places.
Further, with the shaft pin mounting tool having the above-described configuration, the shaft pin C can be attached by a simple lever operation. In addition, since the first lever 4 and the second lever 5 are arranged on the side of the shaft, there is no problem in lever operation when the shaft pin C is mounted even in a narrow working environment.

DESCRIPTION OF SYMBOLS 1 Fixing part 1a Female thread 1b Support part 1c Guide groove 2 Mounting part 2a Male thread 2b Recessed part 2c Taper part 3 Extrusion part 3a Support part 3b Guide part 3c Notch part 3d Hole 4 1st lever 5 2nd lever 5a Pin 6 step Shaft 6a Mounting groove

Claims (5)

A shaft pin mounting tool for attaching a shaft pin such as a C-shaped retaining ring to a predetermined shaft,
A fixed part;
One end portion is detachably provided on the fixed portion, and the other end portion is engageable with the end of the shaft;
A first lever having one end portion fixed to the fixing portion;
An extruding portion movable along the fixed portion so that the other end portion of the mounting portion approaches and separates from the shaft when engaged with the end portion of the shaft;
A second lever having one end connected to the push-out portion and an intermediate portion rotatably provided at an intermediate portion of the first lever;
With
The pushing portion pushes the shaft pin disposed on the outer peripheral portion of the mounting portion when the other end portion of the second lever approaches the other end portion of the first lever, and A shaft pin mounting tool which is extruded from the other end side of the mounting portion. The fixing portion has a columnar shape or a cylindrical shape, and is provided with a support portion for fixing the first lever at a predetermined position on the outer peripheral surface thereof.
The extruding part has a cylindrical shape, the fixing part is disposed in a hollow part, and is configured to be movable in the axial direction of the fixing part. In the axial direction, a notch for avoiding contact with the supporting part. The shaft pin mounting tool according to claim 1, wherein a portion is formed. A guide groove formed along the axial direction of one of the fixed part and the extruded part,
A guide portion provided in the other of the fixed portion and the push-out portion and disposed in the guide groove;
The shaft pin mounting tool according to claim 2, further comprising: The mounting part is
One end has a diameter smaller than the inner diameter of the shaft pin;
The other end has a diameter larger than the inner diameter of the shaft pin,
The shaft pin mounting tool according to any one of claims 1 to 3, wherein a taper portion whose diameter gradually decreases from the other end portion is formed in an intermediate portion thereof. A shaft pin mounting tool for attaching the shaft pin to the end of the step shaft of the man conveyor,
The shaft pin mounting tool according to any one of claims 1 to 4, wherein the mounting portion has a concave portion in which an end portion of the step shaft is accommodated on an end surface of the other end portion.

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