JP2013244559A - Jig for fitting c-type retaining ring for shaft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jig for fitting a C-type retaining ring for a shaft, for reliably inserting a C-type retaining ring for the shaft to a shaft groove.SOLUTION: A jig for fitting a C-type retaining ring for a shaft is used to insert a C-type retaining ring 4 for the shaft attached to a step shaft 3 to a groove 31 formed on an outer peripheral surface of the step shaft 3, and it includes a pushing part with a recess 23 where an end of the step shaft 3 is inserted, and an automatic punch 1 which has a hitting part 12 that hits a pushing part 2 when a predetermined force is added. The pushing part 2 pushes the C-type retaining ring 4 for the shaft in an axial direction of the step shaft 3 so that the C-type retaining ring 4 for the shaft is inserted into the groove 31 when the pushing part 2 is hit by the hitting part 12 while the end of the step shaft 3 is inserted into the recess 23.

Description

  The present invention relates to a shaft C-shaped retaining ring mounting jig for inserting a shaft C-shaped retaining ring attached to a shaft into a groove formed on the outer peripheral surface of the shaft.

  Conventionally, a mounting portion that is formed in a tapered shape, the end on the large diameter side covers the end of the shaft, and a C-type retaining ring for the shaft is attached to the outer periphery, and a C-shaped retaining ring for the shaft that is attached to the mounting portion There is known a C-type retaining ring mounting jig for a shaft including an extruding portion that pushes the shaft toward the shaft (for example, see Patent Document 1).

JP 2011-121149 A

  However, when the shaft C-shaped retaining ring is attached to the shaft, the shaft C-shaped retaining ring may not be inserted into a groove formed in the circumferential direction on the outer peripheral surface of the shaft. Whether or not the shaft C-shaped retaining ring is inserted into the shaft groove is determined by visual confirmation by the operator. Therefore, if the operator mistakenly confirms the insertion of the C-type retaining ring for the shaft into the shaft groove, the C-type retaining ring for the shaft may remain uninserted in the shaft groove. There was a problem.

  The present invention provides a shaft C-shaped retaining ring mounting jig that can more reliably insert a shaft C-shaped retaining ring into a shaft groove.

  A shaft C-shaped retaining ring mounting jig according to the present invention is a shaft C-shaped retaining ring mounting jig for inserting a shaft C-shaped retaining ring attached to a shaft into a groove formed on the outer peripheral surface of the shaft. An automatic tool that has a pushing part formed with a recess into which an end of the shaft is inserted and a tapping part, and the tapping part strikes the pushing part when a predetermined force is applied. And the push-out portion is inserted so that the shaft C-shaped retaining ring is inserted into the groove when it is struck by the hitting portion with the end of the shaft being inserted into the recess. The shaft C-shaped retaining ring is pushed out in the axial direction of the shaft.

  According to the C-type retaining ring mounting jig for a shaft according to the present invention, when a predetermined force is applied, the pushing portion having a recess into which the end portion of the shaft is inserted and a hitting portion are provided. The hitting part is equipped with an automatic punch that hits the pushing part, and when the pushing part is hit by the hitting part with the end of the shaft inserted in the recess, the C-shaped retaining ring for the shaft is inserted into the groove. Since the C-type retaining ring for the shaft is pushed out in the axial direction of the shaft, the C-type retaining ring for the shaft is inserted into the groove formed in the circumferential direction on the outer peripheral surface of the shaft when the C-type retaining ring for the shaft is attached to the shaft. When it is not inserted, the C-type retaining ring for shaft can be reliably inserted into the groove of the shaft.

It is a side view which shows the C-shaped retaining ring attachment jig for shafts concerning Embodiment 1 of this invention. FIG. 2 is a side view showing a step shaft and a C-shaped retaining ring for a shaft in which the C-shaped retaining ring mounting jig for shaft of FIG. 1 is used. It is a front view which shows the C-shaped retaining ring for shafts of FIG. It is a side view which shows the C-shaped retaining ring attachment jig for shafts concerning Embodiment 2 of this invention. It is a front view which shows the cylinder part of FIG. It is a side view which shows the principal part of the C-shaped retaining ring attachment jig for shafts concerning Embodiment 3 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding members and parts will be described with the same reference numerals.

Embodiment 1 FIG.
1 is a side view showing a C-type retaining ring mounting jig for a shaft according to Embodiment 1 of the present invention. In the figure, the C-type retaining ring mounting jig for shaft includes an automatic punch 1 and an extruding portion 2 attached to the automatic punch 1.

  The automatic punch 1 is provided between a gripping part 11 gripped by an operator, a hitting part 12 for hitting the pushing part 2, and the gripping part 11 and the hitting part 12. When a predetermined force is applied, the tapping portion 12 has a tapping force generator 13 that generates a tapping force in the axial direction. The tapping force generator 13 can adjust the magnitude of the tapping force generated by the tapping unit 12.

  The extrusion part 2 is formed in a bottomed cylindrical shape. That is, the extrusion part 2 has the cylinder part 21 and the bottom plate part 22 which closes one opening part of the cylinder part 21. In other words, the recessed portion 23 is formed in the extruded portion 2. The bottom plate part 22 is fixed to the tip part of the hitting part 12 by welding. The extruding unit 2 is arranged so that the axis of the extruding unit 2 overlaps with the axis of the tapping unit 12. The dimension A of the diameter of the inner wall surface of the recess 23 when the recess 23 is viewed from the front is a preset value, in this example, a circular shape of 16 mm. The depth dimension B of the recess 23 is a preset value, in this example, 2.1 mm.

  FIG. 2 is a side view showing a step shaft (shaft) 3 and a shaft C-shaped retaining ring 4 in which the shaft C-shaped retaining ring mounting jig of FIG. 1 is used. A groove 31 extending in the circumferential direction is formed on the outer peripheral surface of the step shaft 3 to which a driving roller (not shown) of the escalator is attached. The dimension C from the end surface of the step shaft 3 to the groove 31 is slightly smaller than the dimension B of the depth of the recess 23 (FIG. 1). In this example, the dimension C from the end surface of the step shaft 3 to the groove 31 is 2.0 mm. The dimension D in the width direction of the groove 31 is a preset value, in this example, 1.2 mm. The diameter dimension E of the step shaft 3 is slightly smaller than the diameter dimension A of the inner wall surface of the recess 23. In this example, the dimension E of the diameter of the step shaft 3 is 15 mm.

  A portion of the step shaft 3 adjacent to the groove 31 in a direction away from the end surface of the step shaft 3 is a roller mounting portion 32 to which a driving roller is mounted. The shaft C-shaped retaining ring 4 is inserted into the groove 31 in a state where the drive roller is attached to the roller attachment portion 32, so that the drive roller is restrained from moving in the direction of coming off the step shaft 3.

  The dimension F in the width direction of the C-shaped retaining ring 4 for shaft is slightly smaller than the dimension D in the width direction of the groove 31. In this example, the dimension F in the width direction of the shaft C-shaped retaining ring 4 is 1.0 mm. FIG. 3 is a front view showing the C-type retaining ring 4 for the shaft of FIG. The shaft C-type retaining ring 4 is configured by bending one pin. At both ends of the C-shaped retaining ring 4 for the shaft, locking hole projections 41 extending outward in the radial direction are formed. A locking C-shaped retaining ring attaching / detaching tool for shaft (not shown) for expanding the diameter of the retaining C-shaped retaining ring 4 and attaching it to the step shaft 3 (FIG. 2) is secured to each retaining hole projection 41. A locking hole 42 into which the pin is inserted is formed. When replacing the drive roller, the shaft C-shaped retaining ring 4 is attached to and detached from the step shaft 3 using a shaft C-shaped retaining ring attaching / detaching tool.

  Next, a procedure for inserting the shaft C-shaped retaining ring 4 attached to the step shaft 3 into the groove 31 using the shaft C-shaped retaining ring mounting jig will be described. First, the C-shaped retaining ring mounting jig for shaft is attached to the step shaft 3 so that the end of the step shaft 3 is inserted into the recess 23. Thereby, the step axis | shaft 3, the extrusion part 2, and the automatic punch 1 are arrange | positioned on the same straight line. Thereafter, the automatic punch 1 is pressed toward the step shaft 3. When a predetermined force is applied to the automatic punch 1, the hitting part 12 hits the pushing part 2. As a result, the pushing portion 2 pushes the shaft C-shaped retaining ring 4 in the axial direction of the step shaft 3 so that the shaft C-shaped retaining ring 4 is inserted into the groove 31. As a result, the shaft C-shaped retaining ring 4 is inserted into the groove 31. Thereafter, the shaft C-shaped retaining ring 4 is separated from the step shaft 3 so that the end portion of the step shaft 3 is pulled out from the recess 23. Thus, the procedure for inserting the shaft C-shaped retaining ring 4 attached to the step shaft 3 into the groove 31 is completed.

  As described above, according to the C-type retaining ring mounting jig for shaft according to the first embodiment of the present invention, the pushing portion 2 in which the recess 23 into which the end portion of the step shaft 3 is inserted is formed, and the tapping The punching portion 12 includes an automatic punch 1 that taps the pushing portion 2 when a predetermined force is applied, and the pushing portion 2 has the end of the step shaft 3 inserted into the recess 23. The shaft C-shaped retaining ring 4 is pushed out in the axial direction of the step shaft 3 so that the shaft C-shaped retaining ring 4 is inserted into the groove 31 when it is struck by the tapping portion 12 in this state. When the retaining ring 4 is attached to the step shaft 3 and the shaft C-shaped retaining ring 4 is not inserted into the groove 31 of the step shaft 3, the shaft C-shaped retaining ring 4 is securely inserted into the groove 31 of the step shaft 3. Can be inserted into. Further, the operator does not need to visually check whether or not the shaft C-shaped retaining ring 4 is inserted into the groove 31, and the efficiency of the work of attaching the shaft C-shaped retaining ring 4 can be improved.

Embodiment 2. FIG.
4 is a side view showing a C-type retaining ring mounting jig for a shaft according to Embodiment 2 of the present invention, and FIG. 5 is a front view showing a cylindrical portion 21 of FIG. In the figure, the C-shaped retaining ring mounting jig for shaft further includes a protruding portion 5 provided on the cylindrical portion 21. The protruding portion 5 protrudes from the cylindrical portion 21 in the direction away from the bottom plate portion 22 and in the axial direction of the cylindrical portion 21. The protruding portion 5 is a C-shaped retaining ring for shaft inserted into the groove 31 when the pushing portion 2 is rotated around the axis of the hitting portion 12 with the end portion of the step shaft 3 being inserted into the concave portion 23. It arrange | positions so that the protrusion part 41 for 4 locking holes may be engaged. Other configurations are the same as those in the first embodiment.

  Next, a procedure for confirming whether or not the shaft C-shaped retaining ring 4 is inserted into the groove 31 using the shaft C-shaped retaining ring mounting jig will be described. As described in the first embodiment, the shaft C-shaped retaining ring mounting jig is attached to the end of the step shaft 3 and the pushing portion 2 is hit by the hitting portion 12, and then the pushing portion 2 is moved to the hitting portion 12. Rotate around the axis. When the protrusion 5 is engaged with the locking hole protrusion 41 before the shaft C-shaped retaining ring mounting jig makes one rotation, the operator can insert the shaft C-shaped retaining ring 4 into the groove 31. It can be confirmed that it has been inserted. On the other hand, if the protrusion 5 does not engage with the locking hole protrusion 41 during one rotation of the shaft C-shaped retaining ring mounting jig, the operator can remove the shaft C-shaped retaining ring 4 from the step shaft. 3 can be confirmed.

  As described above, according to the shaft C-shaped retaining ring mounting jig according to the second embodiment of the present invention, in the state where the end portion of the step shaft 3 is inserted into the recessed portion 23 and inserted into the recessed portion 23. Further provided is a protrusion 5 that engages with the locking hole protrusion 41 of the shaft C-shaped retaining ring 4 inserted into the groove 31 when the pushing portion 2 is rotated around the axis of the hitting portion 12. Therefore, the operator can easily confirm whether or not the shaft C-shaped retaining ring 4 is attached to the step shaft 3 by rotating the pushing portion 2 around the axis of the hitting portion 12. it can.

Embodiment 3 FIG.
FIG. 6 is a side view showing the main part of the C-type retaining ring mounting jig for shaft according to Embodiment 3 of the present invention. In the figure, the extruding part 2 includes a plurality of extruding part main bodies 24 formed with recesses 23 having different diameters A of inner wall surfaces, and an adapter part provided in the tapping part 12 to which each extruding part main body 24 is detachable. 25. The extrusion body 24 to be attached to the adapter section 25 is selected according to the dimension E of the diameter of the step shaft 3. A threaded portion is formed in the portion of the adapter portion 25 that faces the extrusion portion main body 24. A thread groove that engages with the thread portion is formed in the portion of the extruded portion main body 24 that faces the adapter portion 25. Other configurations are the same as those in the first embodiment. In addition, as described in the second embodiment, the protruding portion 5 may be provided on the extruded portion 2. In this case, the protrusion part 5 is provided in the extrusion part main body 24.

  As described above, according to the shaft C-shaped retaining ring mounting jig according to the third embodiment of the present invention, the push-out portion 2 has a plurality of recesses 23 having different inner wall diameters A. Since the pushing portion main body 24 and the adapter portion 25 which is provided in the hitting portion 12 and can be attached to and detached from the pushing portion main body 24 are attached, the pushing portion main body 24 is attached to the adapter portion 25 in accordance with the dimension of the diameter of the step shaft 3. By selecting the pushing portion main body 24, the same C-type retaining ring mounting jig for the shaft can be used for a plurality of types of step shafts 3.

  In each of the above embodiments, the step shaft 3 has been described as an example of the shaft. However, the present invention is not limited to this, and for example, a shaft to which a driven roller of an escalator is attached may be used.

  DESCRIPTION OF SYMBOLS 1 Automatic punch, 2 Extruding part, 3 Step axis | shaft (Axis), 4 C-type retaining ring for 5 axis | shafts, 5 Protrusion part, 11 Grasp part, 12 Tapping part, 13 Tapping force production | generation part, 21 Tube part, 22 Bottom plate part, 23 Concave part, 24 Extrusion part main body, 25 Adapter part, 31 Groove, 32 Roller attachment part, 41 Protrusion part for locking hole, 42 Locking hole.

Claims (3)

A shaft C-shaped retaining ring mounting jig for inserting a shaft C-shaped retaining ring attached to the shaft into a groove formed on the outer peripheral surface of the shaft,
An extruded portion in which a recess into which an end of the shaft is inserted is formed;
An automatic punch that has a hitting portion and hits the push-out portion when the predetermined hitting force is applied;
The pushing portion has a C-shape for shaft so that the C-shaped retaining ring for shaft is inserted into the groove when struck by the hitting portion with the end portion of the shaft being inserted into the recess. A C-type retaining ring mounting jig for a shaft, wherein the retaining ring is pushed out in the axial direction of the shaft.   The C-shaped shaft for shaft inserted in the groove when the push-out portion is rotated around the axis of the hitting portion with the end of the shaft being inserted into the recess in the recess. The shaft C-shaped retaining ring mounting jig according to claim 1, further comprising a projecting portion that engages with a retaining hole projecting portion of the retaining ring.   The extruding part has a plurality of extruding part main bodies formed with the recesses having different inner wall diameter diameters, and an adapter part provided in the hitting part to which the extruding part main body is detachable. The C-type retaining ring mounting jig for shafts according to claim 1 or 2, characterized by the above-mentioned.

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