JP5189581B2 - O-ring mounting device - Google Patents

Description

  The present invention relates to an O-ring mounting device used when mounting an O-ring having a sealing function on a shaft body such as a piston or a bolt.

  When mounting an O-ring having an annular sealing function on a groove provided on the outer peripheral surface of a shaft body such as a piston or bolt, the O-ring is made of a relatively hard material and is not easily elastically deformed. It was quite difficult to put on.

  FIG. 11 is a side view showing a state when the O-ring is mounted in the groove of the shaft body in the conventional O-ring mounting apparatus.

  The conventional O-ring mounting device shown in FIG. 11 has a conical ring expanding portion (not shown) that expands the O-ring 1A, and an O-ring 1A expanded by the ring expanding portion as indicated by an arrow 20. The structure is provided with a slide transporting portion 29 that is pushed forward by the operator's finger 19 and is fitted to the shaft body 5. A groove 17 in which the O-ring 1A is mounted is formed in the shaft body 5. The shaft body 5 is formed with, for example, a male screw portion 5A, and a nut 28 is screwed into the male screw portion 5A.

  In this conventional O-ring mounting device, a plurality of O-rings 1A expanded by a ring expansion section (not shown) are held in contact with the slide transport section 29, and in this state, as shown in FIG. The slide transporting part 29 is detached from the ring expanding part (not shown) and is fitted to the shaft body 5. The O-ring 1 </ b> A closest to the groove 17 of the shaft body 5 is pushed forward by the operator's finger 19 as indicated by an arrow 20 and is attached to the groove 17 of the shaft body 5. There exists a thing shown by patent document 1 as this kind of prior art.

Japanese Patent Laid-Open No. 07-164254

  In the above-described prior art, when the O-ring 1A of the slide transport unit 29 is mounted in the groove 17 of the shaft body 5, the plurality of O-rings 1A are held in contact with each other on the slide transport unit 29. It is difficult to push only one O-ring 1A to be mounted in the groove 17 of the shaft body 5 in the direction of the groove 17, so that the operation becomes complicated and the efficiency of the O-ring mounting operation cannot be expected.

  In addition, although it is possible to hold | maintain the several O ring 1A attached to the slide transport part 29 in the slide transport part 29 at intervals, the O ring 1A hold | maintained at the slide transport part 29 is not shown in figure. Twist is likely to occur in the expanded portion. Therefore, even if an attempt is made to hold the plurality of O-rings 1A at intervals in the slide transporting portion 29, the O-ring 1A is likely to move on the slide transporting portion 29 by the above-described force to return the twist and easily adhere to each other. It is. For this reason, when only one O-ring 1A is held by the slide transport unit 29, or when a plurality of O-rings 1A are held by the slide transport unit 29, the interval between them should be sufficiently large. As a result, the number of O-rings 1A held by the slide transport unit 29 is likely to be limited. Therefore, even in this case, improvement in the efficiency of the O-ring mounting work cannot be expected conventionally.

  The present invention has been made from the actual state in the above-described prior art, and an object of the present invention is to allow a relatively large number of O-rings to be held in the slide transport portion, and to provide a shaft body with the O-rings held in the slide transport portion. An object of the present invention is to provide an O-ring mounting device that can be easily pushed in the extending direction.

  In order to achieve the object, an O-ring mounting device according to the present invention is used when mounting an O-ring on a shaft body, and includes a ring expanding portion that expands the O-ring, and the ring expanding portion. In the O-ring mounting device, the O-ring that has been expanded is pushed forward, and includes a slide transport unit that is fitted to the shaft body. A plurality of O-rings that are formed on the surface of the slide transport unit and hold the O-ring. It is characterized by having a concave shape portion and a convex shape portion arranged between these concave shape portions.

  In the present invention configured as described above, for example, each of the plurality of O-rings expanded by the ring expanding section can be held one by one in the corresponding one of the plurality of concave-shaped sections of the slide transport section. . In this case, even if the O-ring is twisted in the ring expansion portion, the movement of the O-ring due to the release of the twist is prevented by the convex portion, so that the O-ring can be reliably held in the concave portion. . Thereby, a comparatively many O-ring can be hold | maintained at a slide transport part. In addition, by setting the width dimension of the convex shape portion to a small size within a range that allows the O-ring to be pushed forward by the operator's finger or the like, the number of concave shape portions to be formed in the slide transport portion can be reduced. It is possible to increase the number of O-rings held in the slide transport section, and it is possible to easily push the O-rings held in the slide transport section in the extending direction of the shaft body with an operator's finger or the like.

  Further, the O-ring mounting device according to the present invention is the above invention, wherein the slide transporting portion is formed on the same core as the ring expanding portion and is connected to the ring expanding portion, and the O ring is mounted. The hollow body has an inner diameter larger than the outer diameter of the shaft body, and the lateral width of the concave portion is larger than the width dimension of the O-ring, which is a dimension perpendicular to the radial direction of the O-ring. The feature is that it is set to the dimension. According to the present invention configured as described above, the O-ring can be held in the concave portion so that the O-ring does not protrude outside the concave portion.

  Moreover, the O-ring mounting device according to the present invention is characterized in that, in the above invention, each of the concave shape portion and the convex shape portion is formed in an annular shape. The present invention configured as described above can hold the entire O-ring in the concave portion.

  In the O-ring mounting device according to the present invention, in the above invention, an internal thread portion that is screwed into an external thread portion formed in the shaft body to which the O-ring is mounted is formed in the slide transport portion. It is characterized by. In the present invention configured as described above, the slide transport portion can be reliably positioned with respect to the shaft body by screwing the male screw portion of the shaft body and the female screw portion of the slide transport portion.

  Moreover, the O-ring mounting device according to the present invention is characterized in that, in the above-mentioned invention, the ring expanding portion is detachably attached to the slide transport portion. In the present invention configured as described above, when the O-ring is held by the slide transporting portion, for example, in a place different from the place where the shaft body exists, the ring expanding portion is attached to the slide transporting portion in advance and the O-ring Can be held in the slide transport section. In this case, when attaching the O-ring to the shaft body, the ring expanding section is detached from the slide transport section and only the slide transport section holding the O-ring is brought to the place where the shaft body exists. do it. By doing in this way, the operation | work which hold | maintains an O-ring in a slide transport part and the operation | work which mounts an O-ring in a shaft body can be made independent, and the operation | work which mounts an O-ring in a shaft body can be performed efficiently. Can do. It is also possible to previously provide a plurality of slide transport portions having different numbers of O-rings that can be held, and to attach and detach the ring expansion portion to any one of these slide transport portions.

  According to the present invention, the O-ring expanded by the ring expanding portion is pushed forward, and a plurality of recesses that are formed on the surface of the slide transport portion that is fitted to the shaft body to which the O-ring is mounted and hold the O-ring. Since the shape portion and the convex shape portion disposed between these concave shape portions are provided, each of the plurality of concave shape portions is not affected by the twist in the ring expansion portion, and one O-ring. Can be held. In addition, by setting the width dimension of the convex shape portion to a small size within a range that allows the O-ring to be pushed forward by the operator's finger or the like, the number of concave shape portions to be formed in the slide transport portion can be reduced. It is possible to increase the number of O-rings held in the slide transport section, and it is possible to easily push the O-rings held in the slide transport section in the extending direction of the shaft body with an operator's finger or the like. As a result, the efficiency of the O-ring mounting work can be improved as compared with the conventional case.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows 1st Embodiment of the O-ring mounting apparatus based on this invention, (A) A figure is a side view which shows the state decomposed | disassembled, (B) A figure is the a section enlarged view of (A) figure. It is a figure which shows the braking device of the elevator mentioned as an example of the apparatus with which an O-ring is mounted | worn, (A) A figure is a side view, (B) A figure is the b section enlarged view of (A) figure. It is a flowchart which shows the procedure of the removal of O-ring performed using the O-ring mounting apparatus which concerns on 1st Embodiment, and attachment work. It is a figure explaining the operation | work which attaches an O-ring to the O-ring mounting apparatus which concerns on 1st Embodiment, (A) A figure is a side view which shows the state before O-ring attachment, (B) A figure just before attaching an O-ring The side view which shows a state, (C) figure is a side view which shows the state which inserted the O-ring in the ring expansion part. It is a figure explaining the operation | work which attaches an O-ring to the O-ring mounting apparatus which concerns on 1st Embodiment, (A) A figure is a side view which shows the state which hold | maintained the first O-ring in the slide transport part, (B) Is a side view showing a state where a plurality of O-rings including the O-ring held thereafter are held by the slide transporting part, and FIG. (C) is a side view showing a state where the ring expanding part is detached from the slide transporting part. FIG. FIG. 4 is a diagram showing an operation for fitting the slide transporting part to the shaft body provided in the elevator braking device shown in FIG. 3, and (A) is a side view showing a state immediately before the slide transporting part is fitted to the shaft body; (B) The figure is a side view which shows the state which made the slide transport part fit to the shaft. FIG. 4 is a view showing an operation of mounting the O-ring held by the slide transport portion of the present embodiment on the shaft groove provided in the elevator braking device shown in FIG. 3, and FIG. FIG. 5B is a side view showing a state in which the O-ring is attached to the groove of the shaft body. It is a side view which shows the state which made the slide transport part of 1st Embodiment detach | leave from the shaft body to which the O-ring was mounted | worn. It is a side view which shows 2nd Embodiment of the O-ring mounting apparatus which concerns on this invention. It is a side view which shows 3rd Embodiment of the O-ring mounting apparatus which concerns on this invention. In the conventional O-ring mounting apparatus, it is a side view showing a state when mounting the O-ring in the groove of the shaft body.

  Embodiments of an O-ring mounting device according to the present invention will be described below with reference to the drawings.

  1A and 1B are diagrams showing a first embodiment of an O-ring mounting device according to the present invention, in which FIG. 1A is a side view showing a disassembled state, and FIG. 1B is an enlarged view of part a in FIG. .

  As shown in FIG. 1, the O-ring mounting device according to the first embodiment has a ring expansion portion 8 that expands the O-ring 1 and an O-ring 1 that is expanded by the ring expansion portion 8 pushed forward. And a slide transporting part 15 fitted to a shaft body 5 to be described later.

  The ring expanding portion 8 is provided, for example, so as to be detachable with respect to the slide transporting portion 15, and a small diameter portion 2 into which the O ring 1 is inserted, and an inner diameter 1 a of the O ring 1 extending from the small diameter portion 2. The conical part 3 to be expanded, the horizontal part 4 extending from the maximum diameter part of the conical part 3, and provided on the side opposite the small diameter part 2 of the horizontal part 4, and when the O-ring 1 moves, the O-ring 1 And a fitting portion 7 having an outer diameter 6A, for example, equal to or smaller than an outer diameter 6 of a shaft body 5 to be described later on which the O-ring 1 is mounted. Yes.

  The slide transporting part 15 has an inner diameter 6B larger than the outer diameter 6A of the fitting part 7 of the ring expanding part 8, and is formed, for example, in the same core as the ring expanding part 8 and connected to the ring expanding part 8 Made of hollow cylindrical shape. An inner diameter 6B of the slide transport portion 15 is set to be larger than an outer diameter 6 of a shaft body 5 described later. In addition, a plurality of, for example, annular concave portions 11 on which one O ring 1 is mounted are arranged on the surface of the slide transporting portion 15, and the twisted portion of the O ring 1 is disposed between the concave shaped portions 11. For example, an annular convex portion 13 that forms a separator that prevents the movement of the O-ring 1 that occurs when the O-ring 1 is released, and the O-ring 1 is held when the O-ring 1 is held as shown in FIG. The ring 1 is chamfered so as not to damage the ring 1. The lateral width 11 </ b> A of the concave portion 11 described above is set to a dimension larger than the width dimension 1 </ b> C of the O-ring 1, which is a dimension in a direction orthogonal to the radial direction of the O-ring 1, for example. Further, the width dimension of the convex portion 13, that is, the dimension corresponding to the interval between the adjacent O rings 1 when one O ring 1 is held in each of the concave portion 11 of the slide transport portion 15, for example, The dimension is set to a small size within a range in which the O ring 1 can be pushed forward by the operator's finger or the like.

  FIGS. 2A and 2B are diagrams showing an elevator braking device cited as an example of a device to which an O-ring is mounted. FIG. 2A is a side view, and FIG. 2B is an enlarged view of a portion b in FIG.

  Protection devices 25 and 26 are provided on a device provided with the shaft body 5 in which the O-ring mounting device according to the first embodiment is used, for example, an elevator braking device 24. A shaft body 5 is inserted into the protection plate 25, and a pair of nuts 27 and 28 are screwed to the shaft body 5 so as to sandwich the protection plate 25. A groove 17 is provided in the portion of the shaft body 5 located in the protection plate 25, and an O-ring 1 is attached to the groove 17, and the O-ring 1 prevents water from entering the braking device 24. The braking device 24 is periodically disassembled and cleaned.

  FIG. 3 is a flowchart showing a procedure for removing and attaching the O-ring performed using the O-ring mounting device according to the first embodiment.

  FIG. 3 is a flowchart illustrating an operation of replacing the old O-ring 1 mounted on the shaft body 5 of the braking device 24 with the new O-ring 1 using the O-ring mounting device according to the first embodiment. Based on

  First, the nut 27 is removed from the shaft body 5, and the protection plate 25 is removed from the shaft body 5 (step S1). Next, the old O-ring 1 mounted so far is removed from the shaft body 5 (procedure S2). Next, the nut 28 is removed from the shaft body 5, and the protection plate 26 is removed from the shaft body 5 (step S3). In this state, the braking device 24 is cleaned (step S4).

  When the cleaning of the braking device 24 is completed and the new O-ring 1 is mounted on the shaft body 5, first, the protection plate 26 is attached to the shaft body 5, and then the nut 28 is attached to the shaft body 5 ( Procedure S5).

  Here, for example, as shown in FIG. 4A, the ring expanding portion 8 is attached to the slide transporting portion 15 and the two are assembled together (step S6).

  Next, as indicated by an arrow 16 in FIGS. 4B and 4C, the O-ring 1 is inserted from the small-diameter portion 2 of the ring expanding portion 8, and the O-ring 1 is expanded at the conical portion 3. Is done. Next, as shown in FIG. 5A, the expanded O-ring 1 is moved from the ring expansion portion 8 to the slide transport portion 15, and the concave shape located at the forefront of the slide transport portion 15. The portion 11 is held. Similarly, as shown in FIG. 5B, the other plurality of O-rings 1 can also be held one by one in the remaining concave portions 11 formed in the slide transporting portion 15. Performed (procedure S7).

  Next, as shown in FIG. 5C, the ring expanding portion 8 is detached from the slide transporting portion 15 (step S8).

  Next, as shown by an arrow 18 in FIG. 6A, the slide transporting portion 15 holding the plurality of O-rings 1 is fitted to the shaft body 5 (step S9). At this time, as shown in FIG. 6B, the end surface 15A of the slide transport portion 15 is positioned with respect to the groove 17 of the shaft body 5 (step S10).

  In such a state, as indicated by an arrow 20 in FIGS. 7A and 7B, the O-ring 1 held in the concave shape portion 11 of the slide transport portion 15 is held by the operator's finger 19, for example. It is pushed forward and attached to the groove 17 of the shaft body 5 (step S11).

  Finally, as shown in FIG. 8, the slide transport portion 15 is removed from the shaft body 5, and the replacement work of the O-ring 1 with respect to the shaft body 5 is completed (step S12). Hereinafter, when there is another place where the O-ring 1 needs to be mounted, the mounting operation of the O-ring 1 is performed in the same manner as described above.

  According to the O-ring mounting device according to the first embodiment configured as described above, each of the plurality of O-rings 1 expanded by the ring expansion unit 8 as described above includes the plurality of recesses of the slide transport unit 15. Each of the shape portions 11 can be held one by one. In this case, even if the O-ring 1 is twisted at the ring expansion portion 8, the movement of the O-ring 1 due to the release of the twist is prevented by the convex portion 13, so that the O-ring 1 is securely attached to the concave portion 11. Can be held. As a result, a relatively large number of O-rings 1 can be held in the slide transport unit 15. In addition, since the width dimension of the convex portion 13 is set in advance to a small dimension within a range in which the O-ring 1 can be pushed by the operator's finger 19 or the like, the concave shape formed in the slide transport portion 15 is formed. The number of the parts 11 can be increased to allow the slide transporting part 15 to hold a relatively large number of O-rings 1, and the O-ring 1 held by the slide transporting part 15 can be held by the operator's fingers 19 and the shaft 5. It can be easily pushed in the extending direction. As a result, the efficiency of the mounting operation of the O-ring 1 can be improved.

  Further, since the lateral width 11A of the concave portion 11 is set to be larger than the width dimension 1C of the O-ring 1, the concave portion is set so that the O-ring 1 does not protrude outside the concave portion 11. 11 can hold the O-ring 1. Thereby, the O-ring 1 can be stably held in the slide transport unit 15.

  Moreover, since each of the concave shape portion 11 and the convex shape portion 13 is formed in an annular shape, the entire O-ring 1 can be held in the concave shape portion 11, and the O-ring 1 of the slide transport portion 15 can be held. Contributes to stable maintenance.

  Moreover, since the ring expansion part 8 is provided so as to be detachable from the slide transport part 15, when the O-ring 1 is held by the slide transport part 15, for example, the installation of the braking device 24 provided with the shaft body 5 is provided. In a place different from the place, the ring expanding portion 8 can be attached to the slide transport portion 15 in advance and the O-ring 1 can be held by the slide transport portion 15. In this case, when the O-ring 1 is attached to the shaft body 5, the ring expanding portion 8 is detached from the slide transport portion 15, and the O-ring is installed to the installation location of the braking device 24 including the shaft body 5. It is only necessary to bring the slide transport section 15 holding 1. By doing in this way, the operation | work which hold | maintains the O-ring 1 in the slide transport part 15 and the operation | work which mounts the O-ring 1 in the shaft body 5 can be made independent, and the O-ring 1 is mounted in the shaft body 5. Work can be done efficiently.

  Further, since the inner diameter 6B of the slide transporting portion 15 is set larger than the outer diameter 6 of the shaft body 5, even if the male screw portion 5A is present on the shaft body 5, the O-ring 1 is not damaged and the groove 17 is not damaged. It can be attached securely.

  FIG. 9 is a side view showing a second embodiment of the O-ring mounting device according to the present invention.

  The second embodiment shown in FIG. 9 has a fitting portion 7A that fits into the fitting portion 7 of the ring expanding portion 8 described above inside the slide transporting portion 22, and is connected to the fitting portion 7A. An internal thread portion 5B that is screwed into the external thread portion 5A of the shaft body 5 is formed. Other configurations are the same as those in the first embodiment described above.

  The second embodiment configured as described above also includes a plurality of concave-shaped portions 11 that hold the O-ring 1 and convex-shaped portions 13 that are provided between the concave-shaped portions 11, and thus described above. The same effect as the first embodiment can be obtained. Moreover, since the slide transport part 22 has the internal thread part 5B screwed to the external thread part 5A of the shaft body 5, the external thread part 5A of the shaft body 5 and the internal thread part 5B of the slide transport part 22 are screwed together. The slide transporting part 22 can be reliably positioned with respect to the shaft body 5, and the work accuracy of the mounting operation of the O-ring 1 can be increased.

  FIG. 10 is a side view showing a third embodiment of the O-ring mounting device according to the present invention.

  The third embodiment shown in FIG. 10 has a longer length than the slide transport portions 15 and 22 provided in the first and second embodiments described above, and has a large number of concave shaped portions 11. It is set as the structure provided with. Other configurations are the same as those in the first embodiment described above. 3rd Embodiment comprised in this way also has the same effect as 1st Embodiment from having the some concave shape part 11 and the convex shape part 13 provided between these concave shape parts 11. FIG. can get. Moreover, since the number of the recessed shape parts 11 provided in the slide transport part 23 is set to be larger than the number of the recessed shape parts 11 provided in the first and second embodiments, more O-rings 1 are held. Can be made.

  In addition, by preparing the slide transport part 23 shown in the third embodiment together with the slide transport parts 15 and 22 shown in the first and second embodiments in advance, an O-ring to be mounted on the expected shaft body 5 is prepared. According to the number of 1, the slide transport part considered to be more suitable can be selected, and the ring expansion part 8 can be attached to or detached from the selected slide transport part. Thereby, the efficiency of the mounting | wearing operation | work of O-ring 1 can be improved more.

DESCRIPTION OF SYMBOLS 1 O ring 1C Width 2 Small diameter part 3 Conical part 4 Horizontal part 5 Shaft body 5A Male thread part 5B Female thread part 6 Outer diameter 6A Outer diameter 6B Inner diameter 7 Fitting part 7A Fitting part 8 Ring expansion part 9 Surface 11 Concave Shape part 11A Width 13 Convex part 15 Slide transport part 17 Groove 22 Slide transport part 23 Slide transport part 24 Elevator braking device

Claims (5)

Used when attaching an O-ring to the shaft body,
In an O-ring mounting device comprising: a ring expanding portion that expands the O-ring; and a slide transporting portion that is fitted to the shaft body while the O-ring expanded by the ring expanding portion is pushed forward ,
An O-ring mounting device comprising: a plurality of concave-shaped portions formed on the surface of the slide transporting portion for holding the O-ring; and a convex-shaped portion disposed between the concave-shaped portions. The O-ring mounting device according to claim 1,
The slide transport portion is formed in the same core as the ring expanding portion, is connected to the ring expanding portion, and has a hollow cylindrical shape having an inner diameter larger than an outer diameter of the shaft body to which the O-ring is mounted. Consisting of
An O-ring mounting device characterized in that a lateral width of the concave portion is set to a dimension larger than a width dimension of the O-ring which is a dimension in a direction orthogonal to a radial direction of the O-ring. The O-ring mounting device according to claim 1,
An O-ring mounting device, wherein each of the concave shape portion and the convex shape portion is formed in an annular shape. The O-ring mounting device according to claim 1,
An O-ring mounting device, wherein an internal thread portion that engages with an external thread portion formed on the shaft body to which the O-ring is mounted is formed inside the slide transport section. In the O-ring mounting device according to any one of claims 1 to 4,
An O-ring mounting device, wherein the ring expanding portion is detachably attached to the slide transporting portion.

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