JP3525286B2 - Retaining ring mounting device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retaining ring mounting device suitable for automatically mounting a retaining ring for fixing a gear or the like on a shaft.

[0002]

2. Description of the Related Art E-type retaining rings and crescent retaining rings are, for example, assembled to prevent the gears mounted on a shaft from coming off during the assembly process of various devices. 5 are exemplified. The apparatus shown in the figure includes a plate-shaped base member 70 having a step 71 and a projection end surface 72 on the upper end side, and a stop plate 74 fitted to the base member 70 and biased upward by a spring 73. An elevating member 75, an alignment bar 76 disposed on the step portion 71 side, which is not shown, has a fulcrum on the right side, and is urged upward to swing, and is arranged above the base member 70 and faces downward. It comprises a pusher 78 with an open groove 77. Alignment bar 7
6, the retaining ring 1 is aligned and is biased to the left in the drawing by a spring or the like. When the elevating member 75 is on the upper side as shown in FIG. 5B, the retaining ring 1 at the tip abuts on the side surface of the retaining plate portion 74, and one retaining ring 1 is attached to the end surface 72 of the protruding portion of the base member 70. Is displayed. From this state,
As shown in (a), the groove 7 of the shaft 7 is provided in the upper opening of the retaining ring 1.
The groove 7a of the shaft 7 is engaged with the inner diameter of the retaining ring 1 by matching a and lowering the pusher 78.

[0003]

However, the above-mentioned conventional mounting device is still unsatisfactory from the following points. That is, in this mounting apparatus, the retaining ring 1 at the tip is placed on the end surface 72 of the protrusion of the base member 70 on the fixed side, and the shaft 7 is lowered from the upper side thereof via the pusher 78. Therefore, as a device structure, first, a descending mechanism of the shaft 7 is required, and if the shaft 7 is long and descends while maintaining the parallelism, the mechanism becomes complicated. Further, in this structure, since the stop plate portion 74 that receives the stop ring 1 at the tip from one end surface side is indispensable, for example, the shaft already has parts such as gears mounted thereon as shown in FIG. 1 of the present invention. In that case, the mounted parts will be in the way and cannot be mounted, and the applied shaft will be restricted.
If there are two grooves for mounting the retaining ring close to each other as in the shaft of FIG. 4, there is a problem that the retaining ring 1 cannot be mounted simultaneously and the mounting efficiency is poor.

From the background described above, the present applicant has developed a device that is easy to automate and that can attach two or more retaining rings to the shaft at the same time. 10-12830). It is an object of the present invention to further simplify it and to promptly deal with two or more retaining rings or even when the number of retaining rings is changed. Other purposes will be clarified one after another in the content described below.

[0005]

In order to achieve the above object, the present invention provides a retaining ring with an opening, which is formed by cutting out a part of the periphery, in a groove of a shaft, as illustrated in FIGS. A means for mounting from the opening, holding the plurality of retaining rings in a skewed state on a guide strut, and supplying the retaining rings in sequence from the free end of the guide strut by the biasing force of a biasing member, Holding means for positioning and supporting the shaft in parallel to the guide strut; guide means for the retaining ring provided between the shaft supported by the holding means and the guide strut of the supply means; and the guide strut. The retaining ring holder that has the holder for holding the most advanced retaining ring at the tip and the retaining ring holder is moved back and forth.
And a pusher means having a drive mechanism for driving the snap ring holder, wherein the push mechanism of the pusher means holds the snap ring holder at the holder portion with the most advanced snap ring supplied from the free end of the guide column. Retaining ring mounting device for switching between a position and a mounting position in which the retained retaining ring is moved forward along the sliding surface of the guide means and engages with the groove of the shaft.
In the above, the guide means includes a free end of the guide strut and
In the groove of the shaft supported by the holding means, respectively.
The retaining ring holder has thin plates that are substantially flush with each other.
Hold the retaining ring held by the holder along the thin plate.
Move forward to the mounting position and move backward to the receiving position again
Contacting the retaining ring next to the guide strut during the
Has a contact plate portion, and the holder portion of the guide strut is
Holds the most advanced retaining ring by receiving the outer surface of the retaining ring
It has a semi-circular shape and is cut out from the contact plate side.
Has a step section divided into upper and lower parts by a slit
It is characterized by that .

According to the above device structure, a plurality of retaining rings are set on the supply means, and the retaining ring holder is operated from the standby state at the receiving position (see FIG. 1). That is, in the receiving position, the retaining ring holder receives and retains the retaining ring at the tip supplied to the free end of the guide strut, and then drives the pusher means forward to drive the retaining ring along the sliding surface of the guide means. The retaining ring thus received is moved to the vicinity of the groove of the shaft and further moved to the mounting position to engage with the groove of the shaft (see FIG. 3). After that, the retaining ring holder is moved to the receiving position again, and at the same time, the same operation is repeated after the target shaft is replaced.

The features of the above apparatus are as follows. (1) All the means can be realized by simple means. That is, the supply means of the present invention may be any one that presses a plurality of retaining rings against the guide column toward the column free end side by a biasing member or the like. The holding means may be any means capable of supporting the shaft, which is the object, in a fixed position. The guide means can be composed of a flat plate or a thin plate such as a spring plate. The pusher means may be any means that drives a retaining ring holder capable of receiving and retaining one retaining ring in a direction crossing the free end of the guide column. (2) It is excellent in versatility because it is difficult to be regulated by the applied shaft and mounting groove. That is, the present invention is different from the structure of FIG. 5 in that the shaft is positionally fixed by the holding means, the frontmost retaining ring of the supply means is retained by the retaining ring holder, and the retaining ring is the pusher means. Since the feature is that it moves to the snap ring mounting position by mechanical movement, when the shaft already has parts such as gears mounted as shown in Fig. 1, the grooves of the shaft are adjacent to each other as shown in Fig. 4. It is possible to easily deal with the case where they are provided as a pair. (3) The tact is shortened when the retaining ring is continuously mounted on a large number of shafts, and efficient mounting work is realized.
That is, in operating this apparatus, the shaft can be easily replaced, and the retaining ring next to the guide column can be moved based on the shaft replacement time.

More preferably, the retaining ring mounting device described above is embodied as follows. That is, when there are a plurality of grooves in the shaft, the retaining ring supply means, the guide means, and the pusher means are each provided in two or more with respect to the holding means. With this structure, when the shaft has a plurality of mounting grooves, it is possible to simultaneously mount the corresponding snap rings in the respective grooves.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the device of the present invention will be described below with reference to the accompanying drawings. Since this form example is a preferred embodiment of the present invention, various technically preferable limitations are attached thereto, but it does not limit the technical scope of the present invention.

1 to 3 show an example of a snap ring mounting device according to the present invention, FIG. 1 is a horizontal cross-sectional view of the device, and FIG. 2 is a view taken along the line A--A of FIG. , FIG. 3 is FIG.
FIG. 7 is a diagram when the retaining ring holder of FIG. 6 moves forward from the receiving position to the mounting position. 1 to 3, this snap ring mounting device includes a snap ring supply means 11, a shaft holding means 15, and a snap ring sliding guide means 20 which are respectively installed at predetermined positions on a base 10. A pusher means 30 for moving the snap ring is provided. The retaining ring 1 applied to the present invention is, for example, an E-shaped retaining ring with an opening 1a formed by cutting out a part of the periphery thereof, such as a gear 8 which is a component arranged around the axis of a shaft 7. It prevents the escape and movement of. The shaft 7 has a single groove 7a corresponding to the gear 8 as shown in FIG. 1 (one side is formed with a stopper 7b etc.), the shaft 7 has a plurality of grooves 7a as shown in FIG. Any of the components such as 8 and the like having the groove 7a which is not yet axially mounted may be used.

The retaining ring supplying means 11 is a biasing member arranged so that it can be freely moved to the guide column 12 through a through hole 13a and a guide column 12 having a thickness inserted into the inner diameter of the retaining ring 1. 13 and a spring 14 such as a coil spring that applies a biasing force to the biasing member 13. Guide post 12
Has a substantially semi-cylindrical cross section (see FIG. 2), and the base 10
It is arranged horizontally with respect to and is provided in a positionally fixed state. The biasing member 13 is constantly subjected to the biasing pressure of the spring 14 so as to be moved to the free end 12a side of the guide column 12. Therefore, in this supply means 11, the plurality of retaining rings 1 are set in the same direction as the guide columns 12 by the sectional shape of the guide columns 12, that is, in a set state in which the openings 1a are aligned and inserted, and each retaining ring 1 has a spring 14. It is pushed to the free end 12a side of the guide strut 12 via the biasing means 13 according to the pressure, and when the retaining ring 1 at the tip end is not moved, the second retaining ring 1 is automatically moved to the free end 12a side. Can be migrated.

The shaft holding means 15 includes a plurality of holding members 16 for receiving and supporting the shaft 7 and the shaft 7.
It is composed of a positioning member 17 for positioning before and after. The holding member 16 may be any member as long as it can restrict the radial movement of the shaft 7, and in this example, the upper side is substantially U-shaped. The positioning member 17 is configured to abut the axial end surface of the shaft 7 to position the shaft 7 in the axial direction. The holding member 16 is provided on the base 10.
Are installed so that the shaft 7 is supported substantially parallel to the guide columns 12. The positioning member 17 includes a retaining ring 1 at the tip of the shaft 7 supported by the holding member 16, the groove 7a of which is pushed out from the free end 12a of the guide column 12.
It is installed so that it is almost flush with. In this form,
The shaft 7 is moved by the transfer mechanism onto the holding member 16 or from the holding member 16 to the stock position.

The guide means 20 for sliding the retaining ring comprises a thin plate 22 arranged on the base 10 via a support 21. The support base 21 is located between the shaft 7 that is positioned and supported by the holding means 15 and the guide column 12, and the thin plate 22 is attached to the free end 12 a of the guide column 12 and the shaft 7.
It suffices that the grooves 7a (groove edges of the groove 7a on the gear 8 side) can be arranged substantially flush with each other. Therefore, the support base 21 can be formed integrally with the lower portion of the thin plate 22 and omitted. The thin plate 22 is a spring plate having a plate width (upper and lower widths in FIG. 2) corresponding to the retaining ring 1, and the retaining ring 1 is easily moved while one side is in contact with the corresponding sliding surface of the spring plate. Further, the thin plate 22 of the embodiment has one plate side thereof in close contact with the corresponding end surface of the gear 8 of the shaft 7, and the free end 12
The retaining ring 1 extruded from a is guided from the sliding surface of the thin plate 22 through the end surface of the gear 8 to the groove 7a. However, when the shaft 7 does not have the gear 8, the thin plate 2
It is preferable to extend one side of the plate to the vicinity of the corresponding groove 7a.

The pusher means 30 comprises a retaining ring holder 31 for receiving and retaining the retaining ring 1 pushed out from the free end 12a of the guide column 12, a drive mechanism 32 such as a piston for driving the retaining ring holder 31, and the like. . The retaining ring holder 31 integrally includes a holder portion 33 on the front end side and an abutting plate portion 34 located behind the holder portion 33. The holder portion 33 is designed according to the retaining ring 1 to be used, and has a semicircular step portion 33a (see FIG. 1) that receives and holds the outer end surface of the retaining ring 1 with a shallow depression or the like. The step portion 33a has a slit 33 in which a portion located in the upper and lower middle portions is cut out from the contact plate portion 34 side as shown in FIG.
It is divided by b. The slit 33b imparts elasticity to the upper and lower portions of the holder portion 33, and, for example, the retaining ring 1 held by the holder portion 33 is attached to the shaft 7
The load applied to the retaining ring 1 when engaged with the groove 7a is easily absorbed. The abutting plate portion 34 may be any one that receives the retaining ring 1 on one flat side surface, and the holder portion 33 moves forward from the initial receiving position of the retaining ring 1 to move the retaining ring 1 to the shaft 7. After reaching the mounting position where it engages with the groove 7a and then retreating to the receiving position again, the guide strut 12 is always formed to have a length in contact with the next retaining ring 1. Then, the retaining ring holder 31 described above is moved back and forth by the drive mechanism 32 installed on the base table 10 via the receiving table 35 and the like. That is, the drive mechanism 3
2 has a rod 32a, and by connecting the retaining ring holder 31 to the tip of the rod 32a, the retaining ring holder 3
1 is moved between the snap ring receiving position of FIG. 1 and the snap ring device position of FIG.

When the retaining ring 1 is made of metal, for example, the holder portion 33 is formed of iron and is made of a permanent magnet, so that the retaining ring 1 is more easily and reliably retained. be able to.

Next, the operation and operation procedure of the above snap ring mounting device will be described with reference to an example in which the shaft 7 has a snap ring mounting groove 7a provided in the vicinity of one end surface of the gear 8 on which the shaft 7 is mounted. . In this device, as the initial operation, the supplying means 1
A large number of retaining rings 1 are set to 1. In this work, for example, the retaining rings 1 are inserted in parallel into a rod having an appropriate thickness, and the openings 1a of the retaining rings 1 are aligned sideways.
The biasing member 13 is removed from the guide column 12, the aligned retaining ring 1 is inserted and moved to the guide column 12 side, and the biasing member 13 is attached to the guide column 12 again. Each snap ring 1
Due to the shape of the guide strut 12, the opening 1a is aligned in a state of facing (laterally facing) the groove 7a of the shaft 7, and is biased by the biasing member 13 toward the free end 12a side according to the pressure of the spring 14. . Further, the shaft 7 is transferred onto the holding member 16 by a transfer mechanism (not shown), and is positioned in the axial direction by the positioning member 17.

The pusher means 30 includes a retaining ring holder 31.
Of the drive mechanism 32 is waiting while the retaining ring 1 at the tip is held by the step portion 33a in the holder portion 33.
When driven in the direction of projecting, the snap ring holder 31 is moved forward from the snap ring receiving position of FIG. This move is
The retaining ring holder 31 passes through the free end 12a of the guide strut 12 together with the retaining ring 1 at the tip, and the thin plate 22 of the guide means 20.
After sliding along the corresponding end surface of the gear 8 and then sliding along the corresponding end surface of the gear 8, when the snap ring mounting position of FIG. At the snap ring mounting position,
The retaining ring 1 held by the holder portion 33 is pushed into the groove 7a of the shaft 7 from the opening portion 1a in the radial direction and engaged. At the same time as this engagement, the drive mechanism 32 operates the rod 32.
A is switched to a retracted direction and driven, and the retaining ring holder 3
Move 1 to the initial snap ring receiving position.

The position of the second retaining ring 1 pushed by the free end 12a of the guide column 12 is regulated by hitting the side surface of the contact plate portion 34 until the retaining ring holder 31 is moved to the retaining ring receiving position again. ing. Then, when the retaining ring holder 31 is moved to the retaining ring receiving position, the second retaining ring 1 is received and held by the step portion 33a of the holder portion 33. At the same time, the shaft 7 having the retaining ring 1 mounted thereon is moved to the stock position by a transfer mechanism or the like, the next shaft 7 is transferred onto the holding member 16, and the positioning member 17 positions the shaft in the axial direction. Is done. Hereinafter, the retaining ring mounting operation is repeated in the same manner. The load when the retaining ring 1 engages with the groove 1a is several k if the target article is for a small pump or an office machine, for example.
Since it is about g, the drive mechanism 32 may be manually operated, or may be an operator's hand. Then, in such a retaining ring mounting device, the drive mechanism 3 of the pusher means 30.
Efficient automation can be easily realized by controlling a series of operations for the transfer mechanism that exchanges the shaft 2 and the shaft 2. Further, the supply means 11 for storing the retaining rings 1 side by side is composed of the urging member 13 provided with the guide columns 12 and the springs 14. According to this, it is possible to stop at a few hundreds per batch. You will need to refill wheel 1. When driving unmanned for a long time, for example, the snap ring 1
Is supplied to the end of the guide column 12 by using a vibrating parts feeder and the like, and the urging member 13 is an urging structure in which an intermittent pressurizing means such as an air cylinder is used.

FIG. 4 shows a modified example of the above-mentioned device, which is shown in a section similar to that of FIG. In this snap ring mounting device,
The structure different from the above-mentioned device is centered on the portion corresponding to the shaft holding means 15 in FIG.
1, a plurality of guide means 20 and pusher means 30 are provided. This is used when the shaft 7 has three grooves 7a as shown in FIG. In this case, the holding means 15 of FIG. 4 comprises a plurality of holding members 16 for receiving and supporting the shaft 7 and a positioning member 27 for supporting the shaft 7 and positioning the shaft 7 in the front and rear directions. Further, the guide means 20 is formed by a plate member in which a thin plate portion forming a sliding surface and a support portion are integrated with those of FIG. Furthermore, of the three grooves 7a, the adjacent two
The pusher means 30 corresponding to each groove 7a is a free end 12a of each guide column 12 of the supply means 11 provided on the left and right.
Two retaining ring holders 31 for receiving and holding the retaining rings 1 pushed out respectively from both retaining ring holders 31
35 for commonly connecting the rods to a single rod 32a
And a drive mechanism 32 such as a piston for driving the rod 32a
Etc.

As described above, the respective means 11, 20,
15, 30, depending on the shape of the target shaft 7 and the retaining ring 1, also in accordance with the number and position of the groove 7a of the shaft 7
Those capable of seeds s deformation.

[0021]

As described above, according to the retaining ring mounting device of the present invention, when the retaining ring is mounted in close contact with the end face of the gear or the like provided on the shaft, the grooves on both end faces of the gear or the like are provided. It is also possible to attach them to both at the same time. Moreover, each of the means is simple, and can be easily realized even in the case of a multiple type in which a plurality of retaining rings are mounted on a common shaft, so that a simple and efficient assembling work is performed. The effect that can be obtained is obtained.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a horizontal cross-section of a form apparatus of the present invention.

FIG. 2 is a schematic configuration diagram viewed from a direction along line AA in FIG.

FIG. 3 is a diagram when the retaining ring holder of FIG. 1 is moved forward to a mounting position.

FIG. 4 is a schematic configuration diagram showing another embodiment of the device of the present invention in a state similar to that of FIG.

FIG. 5 is a vertical cross-sectional view for explaining an example of a conventional device.

[Explanation of symbols]

1 is a snap ring 7 is a shaft (7a is a groove of a shaft) 8 is a gear (part or work) 10 is a base 11 is a snap ring supply means 12 is a guide strut 13 is a biasing member 15 is a shaft holding means 20 The guiding means 22, the thin plate 30, the pusher means 31, the retaining ring holder 32, the drive mechanism 33, the holder portion 33a, the step portion 33b, the slit 34, and the contact plate portion.

Claims (2)

(57) [Claims] 1. A retaining ring with an opening part to lack cut was around, intended for mounting through the opening into the groove of the shaft
There, held skewered state said plurality of snap ring to the guide post,
Supply means for sequentially supplying the retaining ring from the free end of the guide column by the urging force of an urging member, holding means for positioning and supporting the shaft in parallel to the guide column, and the supporting means supported by the holding means. A retaining ring guide means provided between the shaft and a guide strut of the supply means, a retaining ring holder having a holder portion for holding the leading edge retaining ring of the guide strut formed at the tip, and the retaining ring. E
And a pusher means having a drive mechanism for moving the rudder back and forth , wherein the drive mechanism of the pusher means attaches the retaining ring holder to the leading edge retaining ring supplied from the free end of the guide column. In the retaining ring mounting device for switching between the receiving position held by the section and the mounting position for moving the retained retaining ring forward along the sliding surface of the guide means and engaging with the groove of the shaft , the guide means The free end of the guide column and the holding hand
Almost flush with the grooves of the shaft supported in steps
The retaining ring holder has a thin plate placed on it
Forward along the thin plate to the mounting position and
In the process of moving backward to the receiving position,
It has an abutting plate portion that is in contact with the next retaining ring, and the holder portion is the leading edge retaining ring of the guide strut,
A semi-circular shape that receives and holds the outer end surface of the retaining ring.
The upper and lower parts are slits cut out from the contact plate side.
A wheel mounting device having a stepped section . 2. A method according to claim groove of the shaft to have when a plurality, the retaining ring for supplying means to said holding means and said guide means and said pusher means each 2 or more
1. The snap ring mounting device according to 1.