Mounting confirmation device and mounting confirmation method

Abstract

To provide an attachment confirmation device and an attachment confirmation method which can easily confirm a fitting condition of a cotter and a snap ring.SOLUTION: An attachment confirmation device comprises: a cotter contact part 2 which is inserted into an opening 104a arranged in a retainer 104 along an axis L direction of a shaft 101 to be capable of coming into contact with a cotter 103; a retention mechanism 5 which retains the cotter contact part 2 to freely move forward and backward; a retainer suction part 10 which adsorbs to the retainer 104 when the cotter contact part 2 is inserted into the opening 104a; cotter inspection means 20 which indicates presence or absence of the cotter 103 based on an advancing and retreating position of the cotter contact part 2; and snap ring inspection means 30 which inspects presence or absence of a snap ring 105 based on the change of the absorption state of the retainer 104 when the cotter contact part 2 is extracted from the opening 104a.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an attachment confirmation device and an attachment confirmation method.

Background Art

[0002] Conventionally, a locking member such as a snap ring for preventing detachment in a state where a target component such as a gear is attached to a workpiece such as a shaft is known. In such a case, in a state where the target component is attached to the workpiece, it is directly confirmed whether the snap ring is correctly fitted to the target component using a measuring device to prevent the target component from falling off (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Recently, there is an assembly structure in which a target component attached to a shaft of a workpiece is retained by a cotter, the cotter is covered with a retainer to prevent it from coming off, and the retainer is retained on the shaft by a snap ring. In such a case, when the assembly is completed by attaching the retainer, the snap ring and the cotter are hidden inside the retainer and cannot be visually confirmed. For this reason, it is also conceivable to provide a small window hole at the attachment location of the snap ring and the cotter to look inside the retainer. In this case, it is not easy to confirm whether the snap ring or the cotter is provided from a small and dark window hole at the attachment location of the snap ring or the cotter. Furthermore, the confirmation work using an inspection jig dedicated to each of the snap ring or the cotter is cumbersome to carry around and the efficiency of the assembly work is reduced. Therefore, further improvement was required. In order to solve the above problems, the present invention provides an attachment confirmation device and an attachment confirmation method that can easily confirm the attachment state of a cotter and a snap ring.

Means for Solving the Problems

[0005] In order to solve the problems, an attachment confirmation device of the present invention is an attachment confirmation device for confirming whether a cotter and a snap ring are attached to a workpiece including a target part inserted into a shaft, a cotter engaged with the shaft and the target part to restrict the movement of the target part, a retainer inserted into the shaft and covering the cotter, and a snap ring interposed between the shaft and the retainer to restrict the movement of the retainer with respect to the workpiece. The attachment confirmation device includes a cotter contact portion that is inserted along the axial direction of the shaft from an opening provided in the retainer and can contact the cotter, a holding mechanism that holds the cotter contact portion so as to be movable forward and backward, a retainer adsorption portion that adsorbs to the retainer when the cotter contact portion is inserted into the opening, a cotter inspection means that displays the presence or absence of the cotter based on the forward and backward position of the cotter contact portion, and a snap ring inspection means that inspects the presence or absence of the snap ring based on a change in the adsorption state of the retainer when the cotter contact portion is pulled out from the opening.

Effects of the Invention

[0006] According to the present invention, an attachment confirmation device and an attachment confirmation method that can easily confirm the attachment state of a cotter and a snap ring are provided.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Mode for Carrying Out the Invention

[0008] [Embodiment 1] Hereinafter, embodiments of the present invention will be described with appropriate reference to the drawings. The same reference numerals are given to the same components, and redundant descriptions are omitted. In the description, the same elements are given the same numbers, and redundant descriptions are omitted. Also, when explaining the direction, the direction in which the cotter contact portion 2 is inserted into the opening portion 104a along the axis L direction shown in FIG. 6 is also referred to as the forward direction, and the direction in which it is pulled out is also referred to as the backward direction.

[0009] FIG. 1 shows the attachment confirmation device 1 according to Embodiment 1 of the present invention. The attachment confirmation device 1 is a device for confirming whether the cotter 103 and the snap ring 105 are attached to the workpiece 100 shown in FIG. 3. First, the configuration of the workpiece 100 as an inspection object will be described. The workpiece 100 includes a gear 102 as a target component inserted through the shaft 101, and a cotter 103 that engages with the shaft 101 and the gear 102 to restrict the movement of the gear 102. Further, the workpiece 100 includes a retainer 104 that is inserted through the shaft 101 and covers the cotter 103, and a snap ring 105 that is interposed between the shaft 101 and the retainer 104 to restrict the movement of the retainer 104 with respect to the shaft 101.

[0010] The shaft 101 of Embodiment 1 is the output shaft of a transmission (not shown). The shaft 101 transmits the rotational driving force generated by an engine or a motor to other components of the running drive system. Also, the target component is not limited to the gear 102. For example, the target component may be a pulley or the like as long as it is inserted into the shaft 101. The shaft 101 has a large-diameter portion 101a on the transmission side, and a small-diameter portion 101b that is smaller in diameter than the large-diameter portion 101a and is inserted into the shaft hole of the gear 102. Also, at the end of the small-diameter portion 101b, a center hole 101c for guiding the insertion of the attachment confirmation device 1 in the axial direction of the shaft L is formed to open. And on the outer peripheral surface of the small-diameter portion 101b, a concave groove 101d is formed to be recessed annularly. Also, the outer peripheral surface of the small-diameter portion 101b of the shaft 101 and the inner peripheral surface of the gear 102 are in spline fit.

[0011] As shown in FIG. 3, the cotter 103 is an annular member formed by combining a pair of arc-shaped parts 103a. Each arc-shaped part 103a is engaged with the concave groove 101d of the small-diameter portion 101b from the radially outer side. Thereby, the annular cotter 103 engaged with the shaft 101 projects outward in a convex cross-section and abuts against the side surface 102a (see FIG. 7) of the gear 102, restricting the movement of the gear 102 in the axial direction of the shaft L. For this reason, in the state where the cotter 103 is attached, the gear 102 does not fall off from the shaft 101.

[0012] The retainer 104 is formed annularly (see FIG. 4). Also, on the inner peripheral surface of the retainer 104, three semi-circular openings 104a are formed at equal intervals. The retainer 104 is inserted into the small-diameter portion 101b from the axial direction L so as to cover the radially outer side of the cotter 103 and is attached to the shaft 101. As shown in FIG. 7, the opening 104a communicates from the end of the retainer 104 along the axial direction of the shaft L to the location where the cotter 103 is attached. In other words, the inner peripheral surface of the semi-circular opening 104a is located radially outside the outer peripheral surface of the snap ring 105.

[0013] As shown in FIG. 3, the snap ring 105 is an annular member. The snap ring 105 is configured such that a discontinuous notch is formed in a part of the circumference and it can be elastically deformed in the radial direction. The snap ring 105 is mounted in a groove (see FIG. 7) recessed in the outer surface of the small-diameter portion 101b, and the inner peripheral edge in the radial direction is locked to be attached to the shaft 101. Further, the outer peripheral edge in the radial direction of the snap ring 105 is mounted and locked in a groove recessed in the inner peripheral surface of the retainer 104. Then, the snap ring 105 is interposed between the shaft 101 and the retainer 104 to restrict the movement of the retainer 104 with respect to the shaft 101. Thereby, the snap ring 105 prevents the retainer 104 covering the cotter 103 from coming off and prevents the cotter 103 from falling off. As shown in FIG. 5, when the snap ring 105 is assembled interposed between the shaft 101 and the retainer 104, at the opening 104a of the retainer 104, the space between the inner peripheral surface of the opening 104a and the outer peripheral surface of the snap ring 105 is separated in the radial direction. For this reason, the cotter contact portion 2 is configured to be inserted from the opening 104a and pass along the axial direction L outside the outer peripheral circle of the snap ring 105 so as to reach the location where the cotter 103 is attached (see FIG. 7).

[0014] Next, the configuration of the attachment confirmation device 1 of Embodiment 1 will be described. As shown in FIG. 1, the attachment confirmation device 1 of Embodiment 1 includes a main body portion 7, a cotter contact portion 2 provided on the main body portion 7, and a holding mechanism 5 that holds the cotter contact portion 2 so as to be able to move forward and backward with respect to the main body portion 7. Among these, the main body portion 7 mainly includes a disk-shaped base member 7a, a round bar-shaped handle portion 7f provided on the central rear surface of the base member 7a and gripped by an operator who performs inspection work, and a tapered insertion guide pin 7c provided on the central front surface of the base member 7a and inserted into the center hole 101c (see FIG. 6) of the workpiece 100. Further, the main body portion 7 has cylindrical slide guide members 7b arranged at three locations on the circumference at a predetermined interval around the handle portion 7f on the rear surface side.

[0015] Further, as shown in FIG. 2, the cotter contact portion 2 has an arcuate cross-sectional shape such that its outer diameter dimension is equal to or smaller than the inner diameter dimension of the opening 104a (see FIG. 4). Thus, the cotter contact portion 2 can be inserted with its tip along the axial direction L of the shaft 101 through the radially outer side of the snap ring 105 from the opening 104a (see FIG. 6) provided in the retainer 104. And the cotter contact portion 2 is set to a predetermined height dimension along the axial direction L (see FIG. 7) so that the end face of the tip can come into contact with the cotter 103 attached to the small-diameter portion 101b.

[0016] As shown in FIG. 7, the holding mechanism 5 includes a round bar-shaped rod member 6 provided with a cotter contact portion 2 on one end side 6a, and a through-hole 8. The through-hole 8 is formed in a round hole shape by penetrating the base member 7a and each of the three slide guide members 7b provided on the circumference along the axial direction L. Three rod members 6 of the first embodiment are provided. And each rod member 6 is slidably accommodated in the through-hole 8 respectively. Also, the holding mechanism 5 of the first embodiment is provided with a spring 9 (see FIG. 2) as a biasing means for biasing the cotter contact portion 2 toward the one end side 6a on each rod member 6 respectively. The spring 9 of the first embodiment connects its front end to the rear surface side of the flange-shaped one end side 6a, and connects its rear end to the periphery of the through-hole 8 opening to the front side surface of the base member 7a.

[0017] Thereby, in the unloaded state, the spring 9 aligns and holds the position of the one end side 6a of the rod member 6 in the axial direction L with the position of the retainer adsorption portion 10 described later. Also, the cotter contact portion 2 projects forward from the one end side 6a along the axial direction L (see FIG. 7) by a predetermined dimension. In Embodiment 1, before the retainer suction portion 10 contacts the retainer 104, the front end of the cotter contact portion 2 contacts the cotter 103, compressing the spring 9 along the axial direction of the shaft L. Further, when the cotter 103 is not attached to the shaft 101 (see FIG. 8), even when the retainer suction portion 10 contacts the retainer 104, the front end of the cotter contact portion 2 does not ride over the cotter 103 because the cotter 103 is not attached. Thus, in the case where the cotter 103 is not attached, the attachment confirmation device 1 of Embodiment 1 sets the protruding dimension of the cotter contact portion 2 so that the spring 9 is not compressed while remaining unloaded even when the retainer suction portion 10 contacts the retainer 104.

[0018] Then, as shown in FIG. 2, each of the cotter contact portion 2, the holding mechanism 5, and the cotter inspection means 20 of the attachment confirmation device 1 is provided at a position corresponding to a plurality of openings 104a (see FIG. 4) (see FIG. 6). The cotter inspection means 20 inspects the presence or absence of the cotter 103 based on whether the other end side 6b of the rod-shaped member 6 protrudes from the through hole 8 when the retainer suction portion 10 contacts the retainer 104. For example, as shown in FIG. 7, when the front end of the cotter contact portion 2 contacts the cotter 103 attached to the small-diameter portion 101b, the spring 9 is compressed in the axial direction of the shaft L, retracting the rod-shaped member 6 in the through hole 8. As a result, the other end side 6b of the rod-shaped member 6 protrudes from the rear opening 8a of the through hole 8, and the cotter inspection means 20 can indicate that the cotter 103 is attached to the shaft 101. Also, as shown in FIG. 8, when the cotter 103 is not attached to the shaft 101, the rod-shaped member 6 in the through hole 8 does not move. For this reason, the other end side 6b of the rod-shaped member 6 does not protrude from the rear opening 8a of the through hole 8. Thereby, the cotter inspection means 20 can indicate that the cotter 103 is not attached to the shaft 101, allowing the operator to recognize that reassembly is necessary.

[0019] Furthermore, the attachment confirmation device 1 includes a snap ring inspection means 30 that inspects the presence or absence of the snap ring 105 based on a change in the adsorption state of the retainer 104 when pulling out the cotter contact portion 2 from the opening 104a. The retainer adsorption portion 10 of the first embodiment has a permanent magnet that adsorbs to the metal retainer 104 at the front end of the shaft portion. When the cotter contact portion 2 is inserted into the opening 104a, the retainer adsorption portion 10 that is close to or in contact with the retainer 104 can adsorb the metal retainer 104 by magnetic force.

[0020] As shown in FIG. 7, the snap ring inspection means 30 includes an adjustment mechanism 40 that adjusts the protruding amount of the retainer adsorption portion 10 protruding from the main body portion 7. Specifically, the adjustment mechanism 40 includes a columnar member 41 that protrudes forward from the base member 7a and is fixed by a bolt 42, and a fastening nut 43 that fixes the retainer adsorption portion 10 to the columnar member 41. A male screw portion is formed on the shaft portion of the retainer adsorption portion 10. Then, it is fixed by screwing a predetermined amount of the male screw portion into the female screw portion formed inside the columnar member 41 and tightening the fastening nut 43.

[0021] The adjustment mechanism 40 configured in this way can adjust the position of the permanent magnet at the front end of the shaft portion in the axial direction L of the shaft by changing the screwing amount of the shaft portion screwed in the axial direction of the columnar member 41. Therefore, the retainer adsorption portion 10 whose position is adjusted by the adjustment mechanism 40 can be set so that the tip of the cotter contact portion 2 does not abut against the side surface of the gear 102 when the cotter 103 is not attached (see FIG. 8). Therefore, it is possible to surely prevent the cotter contact portion 2 from retreating and being erroneously displayed as if the cotter 103 is attached when the cotter 103 is not attached. The snap ring inspection means 30 has the retainer adsorption portion 10 on one end side of the columnar member 41. Therefore, by adjusting the axial dimension of the columnar member 41, the protruding amount of the retainer adsorption portion 10 can be easily set.

[0022] Next, a mounting confirmation method for confirming whether the cotter 103 and the snap ring 105 are mounted on the workpiece 100 using the mounting confirmation device 1 of Embodiment 1 will be described. First, as shown in FIG. 3, the workpiece 100 is assembled. Generally, as shown in FIG. 4, the gap formed between the inner wall of the retainer 104 and the small-diameter portion 101b is dark, and it is difficult for an operator to visually confirm whether the cotter 103 or the snap ring 105 is mounted inside the retainer 104.

[0023] As shown in FIG. 6, the mounting confirmation device 1 of Embodiment 1 is advanced along the axial direction of the axis L with the mounting confirmation device 1 including the cotter contact portion 2. As a result, while the insertion guide pin 7c is guided by the center hole 101c of the small-diameter portion 101b, each cotter contact portion 2 is inserted into the three openings 104a.

[0024] As shown in FIGS. 7 and 8, the stop position in the forward direction of the cotter contact portion 2 differs depending on whether the cotter 103 is mounted or not. Therefore, the mounting confirmation device 1 confirms the presence or absence of the cotter 103 based on the stop position of the cotter contact portion 2. At the same time, when advancing the cotter contact portion 2, the retainer suction portion 10 is brought into contact with the retainer 104 to be in a suction state. As shown in FIG. 9, when the cotter contact portion 2 is retracted, the presence or absence of the snap ring 105 is inspected based on the change in the suction state of the retainer 104 with respect to the retainer suction portion 10. For example, as shown by the solid line in FIG. 9, when the retainer 104 comes off the shaft 101, the snap ring 105 is not mounted. Also, as shown by the virtual line in FIG. 9, if the retainer 104 remains on the shaft 101, it can be confirmed that the snap ring 105 is mounted.

[0025] Thus, in the attachment confirmation method using the attachment confirmation device 1 of Embodiment 1, the cotter contact portion 2 and the retainer adsorption portion 10 are reciprocated once in the forward and backward directions. Thereby, it is possible to simultaneously check whether the cotter 103 is attached and to inspect whether the snap ring 105 is attached. For this reason, in the attachment confirmation method of Embodiment 1, it is possible to easily confirm as compared with the confirmation work using an inspection jig dedicated to the snap ring 105 or the cotter, respectively. Therefore, the operator can easily inspect the workpiece 100 and easily determine whether reassembly is necessary, and the efficiency of the assembly work can be improved.

[0026] As described above, in the embodiment, as shown in FIG. 3, a gear 102 as a target component inserted into the shaft 101, a cotter 103 that engages with the shaft 101 and the gear 102 to restrict the movement of the gear 102, a retainer 104 that is inserted into the shaft 101 and covers the cotter 103, and a snap ring 105 that is interposed between the shaft 101 and the retainer 104 to restrict the movement of the retainer 104 with respect to the shaft 101. For the workpiece 100 including the above, there is provided an attachment confirmation device 1 (see FIG. 1) for checking whether the cotter 103 and the snap ring 105 are attached.

[0027] The attachment confirmation device 1 includes a cotter contact portion 2 that is inserted along the axial direction L of the shaft 101 from an opening 104a provided in the retainer 104 and can contact the cotter 103, a holding mechanism 5 that holds the cotter contact portion 2 so as to be movable forward and backward, a retainer adsorption portion 10 that adsorbs to the retainer 104 when the cotter contact portion 2 is inserted into the opening 104a, and a cotter inspection means 20 that displays the presence or absence of the cotter 103 based on the forward and backward positions of the cotter contact portion 2. Further, the attachment confirmation device 1 includes a snap ring inspection means 30 that inspects the presence or absence of the snap ring 105 based on a change in the adsorption state of the retainer 104 when the cotter contact portion 2 is pulled out from the opening 104a.

[0028] The attachment confirmation devices 1 and 201 configured as described above can easily confirm the attachment states of the cotter 103 and the snap ring 105. Specifically, as shown in FIG. 6, the cotter contact portion 2 of the attachment confirmation device 1 is inserted in the forward direction along the axial direction L of the shaft 101 from the opening 104a provided in the retainer 104. The cotter contact portion 2 is held by the holding mechanism 5 so as to be movable forward and backward. Therefore, as shown in FIG. 7, when the cotter 103 is engaged with and attached to the shaft 101 and the gear 102, the cotter contact portion 2 inserted from the opening 104a abuts against the cotter 103 and stops. Also, as shown in FIG. 8, when the cotter 103 is not attached, the cotter contact portion 2 moves further in the forward direction without stopping. Therefore, the cotter inspection means 20 can display the presence or absence of the cotter 103 based on the stop position of the cotter contact portion 2 in the forward and backward directions.

[0029] Furthermore, the retainer suction portion 10 of the attachment confirmation device 1 suctions the retainer 104 when the cotter contact portion 2 is inserted into the opening 104a. Then, when the cotter contact portion 2 is pulled out from the opening 104a, the snap ring inspection means 30 can inspect the presence or absence of the snap ring 105 based on the change in the suction state of the retainer 104 with respect to the retainer suction portion 10. That is, when the snap ring 105 is interposed between the shaft 101 and the retainer 104 and attached, the retainer 104 is fixed to the shaft 101 by the snap ring 105 and thus does not come off. For this reason, the magnetic force of the retainer suction portion 10 loses against the pulling force, and only the retainer suction portion 10 retreats while leaving the retainer 104 on the shaft 101.

[0030] Also, when the snap ring 105 is not attached, as shown in FIG. 9, the retainer 104 not fixed to the shaft 101 comes off the shaft 101 while being adsorbed to the retainer adsorption portion 10 and retreats together with the retainer adsorption portion 10. Therefore, the snap ring inspection means 30 can inspect the presence or absence of the snap ring 105 based on the change in the adsorption state as to whether the retainer 104 has come off.

[0031] As shown in FIG. 7, the holding mechanism 5 includes a rod-shaped member 6 provided with a cotter contact portion 2 on one end side 6a, a main body portion 7 having a through hole 8 through which the rod-shaped member 6 is inserted, and a spring 9 as biasing means for biasing the cotter contact portion 2 toward the one end side 6a. The cotter inspection means 20 inspects the presence or absence of the cotter 103 depending on whether the other end side 6b of the rod-shaped member 6 protrudes from the through hole 8 when the retainer adsorption portion 10 comes into contact with the retainer 104.

[0032] The spring 9 biases the cotter contact portion 2 toward the one end side 6a of the rod-shaped member 6. For this reason, as shown in FIG. 7, when the cotter 103 is attached, the cotter contact portion 2 contacts the cotter 103 and retreats the rod-shaped member 6 within the through hole 8 against the biasing force of the spring 9 to project the other end side 6b from the rear opening 8a of the through hole 8.

[0033] Also, as shown in FIG. 8, when the cotter 103 is not attached to the small-diameter portion 101b of the shaft 101, the cotter contact portion 2 simply advances even when the retainer adsorption portion 10 advances to the position where it contacts the retainer 104. For this reason, since the rod-shaped member 6 does not retreat within the through hole 8, the other end side 6b of the rod-shaped member 6 does not protrude from the rear opening 8a. Therefore, the cotter inspection means 20 can inspect the presence or absence of the cotter 103 based on whether the other end side 6b of the rod-shaped member 6 protrudes from the through hole 8.

[0034] As shown in FIG. 3, in a plurality of embodiments, the cotter 103 is an annular member formed by combining a pair of arcuate parts 103a. Further, in a plurality of embodiments, the retainer 104 has a plurality of three openings 104a formed at equal intervals on the circumference. Then, as shown in FIG. 2, each cotter contact portion 2, holding mechanism 5, and cotter inspection means 20 of the attachment confirmation device 1 are provided at positions corresponding to a plurality of openings (see FIG. 4) (see FIG. 6).

[0035] For example, even if any one of the cotter contact portions 2 falls between adjacent arcuate parts 103a, any one of the other cotter contact portions 2 provided corresponding to each opening 104a contacts the cotter 103. Therefore, it is possible to surely recognize that the cotter 103 is attached. And in the cotter 103 composed of a pair of arcuate parts 103a, 103a, if only one of the arcuate parts 103a is forgotten to be attached, the two cotter contact portions 2 do not move backward. Therefore, it is possible to recognize the omission of attachment and take corresponding measures such as reassembly. Also, as shown in FIG. 2, the cotter 103 is formed by engaging a plurality of arcuate parts 103a with the shaft 101 respectively and combining them into an annular member. Therefore, the annular cotter 103 can be assembled by engaging the arcuate parts 103a with the shaft 101 from the radially outer side respectively.

[0036] Also, as shown in FIG. 7, the snap ring inspection means 30 includes an adjustment mechanism 40 for adjusting the protruding amount of the retainer suction portion 10 protruding from the main body portion 7. Therefore, by adjusting the protruding amount of the retainer suction portion 10 by the adjustment mechanism 40, it is possible to set so that the tip of the cotter contact portion 2 does not abut on the side surface of the gear 102 when the cotter is not attached (see FIG. 8). Therefore, it is possible to prevent the cotter contact portion 2 from retreating and being mis-inspected when the cotter 103 is attached.

[0037] And the snap ring inspection means 30 has a retainer suction portion 10 on one end side of the columnar member 41. Therefore, it is easy to set the protruding amount of the retainer suction portion 10.

[0038] Also, in the attachment confirmation method, as shown in FIG. 3, a gear 102 inserted into a shaft 101, a cotter 103 engaged with the shaft 101 and the gear 102 to restrict the movement of the gear 102, a retainer 104 inserted into the shaft 101 and covering the cotter 103, and a snap ring 105 interposed between the shaft 101 and the retainer 104 to restrict the movement of the retainer 104 with respect to the shaft 101. For the workpiece 100 including these components, it is confirmed whether the cotter 103 and the snap ring 105 are attached. As shown in FIG. 6, in the attachment confirmation method of the embodiment, the cotter contact portion 2 that abuts against and stops at the cotter 103 is advanced, and the presence or absence of the cotter 103 is confirmed based on the stop position of the cotter contact portion 2. At the same time, when the cotter contact portion 2 is advanced, the retainer suction portion 10 is brought into contact with the retainer 104 to be in a suction state. Then, in the attachment confirmation method, when the cotter contact portion 2 is retracted, the presence or absence of the snap ring 105 is inspected based on the change in the suction state of the retainer 104 with respect to the retainer suction portion 10.

[0039] In the attachment confirmation method using the attachment confirmation device 1 in this way, when the cotter contact portion 2 and the retainer suction portion 10 are reciprocated once in the forward and backward directions, the confirmation of whether the cotter 103 is attached and the inspection of whether the snap ring 105 is attached can be performed simultaneously. Therefore, it exhibits a practically useful effect such that it can be easily confirmed compared to the confirmation work using an inspection jig dedicated to the snap ring 105 or the cotter 103 respectively, and the efficiency of the assembly work can be improved.

[0040] The present invention is not limited to the above-described embodiments, and various modifications are possible. The above-described embodiments are exemplified for easy understanding and explanation of the present invention, and are not necessarily limited to those having all the configurations described. Also, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, a part of the configuration of each embodiment can be deleted, or other configurations can be added or replaced. Possible modifications to the above embodiments are, for example, as follows.

[0041] In the embodiment, the output shaft of the transmission has been exemplified and described as the shaft 101. However, the applicable part of the shaft 101 is not particularly limited thereto. For example, it may be a power shaft such as an input shaft of a transmission, a motor shaft, or an engine output shaft. That is, any component through which a rotational driving force is transmitted using the component to be inserted may be used.

[0042] In the embodiment, the retainer adsorption part 10 has been shown and described as having a permanent magnet. However, the retainer adsorption part 10 is not particularly limited thereto. For example, suction by air or suction by adhesion may be used. That is, as long as it has an adsorption force sufficient to prevent it from falling off due to the locking force of the snap ring, the shape, quantity, and adsorption method of the retainer adsorption part 10 may be configured in any way.

Explanation of Reference Numerals

[0043] 1 Mounting confirmation device 2 Cot contact part 5 Holding mechanism 10 Retainer adsorption part 20 Cot inspection means 30 Snap ring inspection means 100 Workpiece 101 Shaft 102 Gear (target part) 103 Cot 104 Retainer 104a Opening 105 Snap Ring

Claims

1. A workpiece comprising a component to be inserted into a shaft, a cotter engaging with the shaft and the component to restrict movement of the component, a retainer inserted into the shaft and covering the cotter, and a snap ring interposed between the shaft and the retainer to restrict movement of the retainer relative to the shaft, and an attachment confirmation device for confirming whether the cotter and the snap ring are attached, a cotter contact portion inserted along the axial direction of the shaft from an opening provided in the retainer and capable of contacting the cotter, a holding mechanism for holding the cotter contact portion so as to be movable forward and backward, a retainer adsorption portion that adsorbs to the retainer when the cotter contact portion is inserted into the opening, a cotter inspection means for displaying the presence or absence of the cotter based on the forward and backward position of the cotter contact portion, a snap ring inspection means for inspecting the presence or absence of the snap ring based on a change in the adsorption state of the retainer when the cotter contact portion is pulled out from the opening, characterized in that the attachment confirmation device comprises the same.

2. The holding mechanism has a rod-shaped member provided with the cotter contact portion on one end side, a main body portion having a through hole through which the rod-shaped member is inserted, and a biasing means for biasing the cotter contact portion toward one end side, The cotter inspection means inspects the presence or absence of the cotter by whether the other end side of the rod-shaped member protrudes from the through hole when the retainer adsorption portion contacts the retainer, according to Claim 1, characterized in that the attachment confirmation device is as described above.

3. The cotter is an annular member formed by combining a plurality of arc-shaped components, The retainer has a plurality of the openings arranged on the circumference, The cotter contact portion, the holding mechanism, and the cotter inspection means are respectively provided at positions corresponding to the plurality of the openings, according to Claim 1, characterized in that the attachment confirmation device is as described above.

4. The snap ring inspection means comprises an adjustment mechanism for adjusting the protruding amount of the retainer adsorption portion protruding from the main body portion, according to Claim 2, characterized in that the attachment confirmation device is as described above.

5. The snap ring inspection means has a columnar member provided with the retainer adsorption portion on one end side, according to Claim 2, characterized in that the attachment confirmation device is as described above.

6. A workpiece comprising a target part inserted through a shaft, a cotter engaging with the shaft and the target part to restrict movement of the target part, a retainer inserted through the shaft and covering the cotter, and a snap ring interposed between the shaft and the retainer to restrict movement of the retainer relative to the shaft. An attachment confirmation method for confirming whether the cotter and the snap ring are attached, comprising advancing a cotter abutting portion that abuts against the cotter and stops, and confirming the presence or absence of the cotter based on the stop position of the cotter abutting portion. At the same time, when advancing the cotter abutting portion, bringing a retainer suction portion into contact with the retainer to make it in a suction state, and when retracting the cotter abutting portion, inspecting the presence or absence of the snap ring based on a change in the suction state of the retainer with respect to the retainer suction portion. The attachment confirmation method is characterized by this.

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