JPH04348826A - Mounting device for falling preventing ring - Google Patents

Abstract

PURPOSE:To provide a mounting device which prevents deformation of a falling preventing ring owing to displacement of a core and is accurately mounted and eliminates high-precise positioning of the device side. CONSTITUTION:When a polygrip washer 38 is mounted on a mounting shaft 48, a conical protrusion part 45 is formed to the tip part of a bit 20 holding the polygrip washer 38 in a skewering state, and the tip part of the mounting shaft 48 being a mating part to be incorporated is recessed in a conical shape to form a part 46 to be engaged. Further, a relation between the protrusion part 45 and the part 46 to be engaged can be replaced with a relation between a recessed part 52 for engagement and a protrusion part 53 to be engaged. The so formed positioning mechanism corrects lateral displacement of the central axes of the two tips when the tip of the bit 20 and the tip of the mounting shaft 48 are brought into contact with each other and performs natural mating of the centers with each other.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a device for installing a fall-off prevention ring, and in particular, it skewers the tip of a bit, chucks the fall-off prevention ring, pushes out the sleeve on the outer circumference of the bit, and attaches the fall-off prevention ring to the attached object. The present invention relates to an attachment device for a fall prevention ring that is attached to a certain position.

0002

[Prior Art] When various mechanical parts such as gears, cams, levers, etc. are incorporated into a shaft attached to a chassis and rotatably supported, the various parts inserted into the shaft are left as they are. If you leave it there, it may fall off. Therefore, after such parts are assembled, a fall-off prevention ring is further attached to the tip end side of the shaft. The fall-off prevention ring is locked by a groove formed on the outer circumferential surface of the tip end of the shaft, thereby preventing the parts from falling off.

0003

SUMMARY OF THE INVENTION In order to attach such a drop-off prevention ring, it is known to skewer the ring onto the tip of the bit. In this case, the distal end of the bit and the distal end of the shaft to which the fall prevention ring is attached are flat, and it is difficult to keep them in contact with each other in the radial direction, both with automatic machines and manually. It wasn't easy either.

[0004] If the tip of the bit and the tip of the shaft come into contact with each other in a shifted state, the fall prevention ring will not be properly assembled. In other words, problems such as the inner edge of the synthetic resin falling-off prevention ring (polygrip washer) turning up, or the polygrip washer getting caught between the bit and the sleeve may occur, which may reduce product quality and manufacturing efficiency. was having a negative impact.

The present invention has been made in view of the above problems, and is designed to ensure that the center of the tip of the bit, which holds the drop-off prevention ring in a skewered manner, and the part to which it is attached are centered. The object of the present invention is to provide a mounting device for a fall-off prevention ring.

[0006]

[Means for Solving the Problems] The present invention chucks a drop-off prevention ring by skewering it at the tip of a bit, and then pushes out a sleeve on the outer circumferential side of the bit to attach the drop-off prevention ring to a part to be attached. In the falling-off prevention ring mounting device, an engaging part is provided at the tip of the bit, and an engaged part is provided at the mounting position, and the bit is fixed to the fitted part by the engaging part and the engaged part. It is designed to be positioned at the mounting part.

[0007]

[Operation] When the bit holding the falling-off prevention ring in a skewer shape is brought close to the installation position, the engaging part formed at the tip of the bit and the engaged part provided at the installation position will come into contact with each other. They engage each other and ensure that the bit is correctly positioned in the installed position.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 show a device for installing a fall-off prevention ring according to an embodiment of the present invention, and this device includes a cylindrical housing 10. As shown in FIG. This housing 1
The upper end of 0 is fixed to the tip of the robot's hand. A main body block 11 is fixed to the lower end side of the cylindrical housing 10 with screws 12. A holder 13 is slidably held within the cylindrical housing 10 and is urged to slide downward by a spring 14 .

A through hole 17 is formed in the center of the holder 13, and the upper end of a rod 18 is inserted into the through hole 17, and the two are connected by a dog pin 19. A bit 20 is integrally formed on the distal end side of the rod 18, and this bit 20 projects from the distal end.

A dog pin 19 for fixing the rod 18 to the holder 13 is detected by a sensor 21 provided on the side. The sensor 21 is fixed to a lower end portion of the cylindrical housing 10. Further, a mounting plate 22 is attached to the dog pin 19, and a sensor 23 is attached to the lower end of the mounting plate 22.
is retained. The sensor 23 is designed to detect the position of the detection target plate 24.

The main body block 11 extends downward and slidably holds the sleeve 27. A proximal cylindrical portion 28 of this sleeve 27 is slidably held on the outer peripheral surface of the distal end side of the main body block 11. The sleeve 27 is slidably urged downward by a spring 29 disposed between the sleeve 27 and the lower end side of the main body block 11.

A dog 30 is implanted in this sleeve 27 and is adapted to protrude laterally. The dog 30 is adapted to be detected by a sensor 31. The sensor 31 is fixed to the outer peripheral surface of the cylindrical housing 10 together with the sensor 21 described above.

A pressing sleeve 34 is disposed above the cylindrical portion 28 of the sleeve 27 and is slidably held on the main body block 11. and the sleeve 34 is the spring 3
5 to slide downwardly, and is received by a stopper 36.

FIG. 3 shows a polygrip washer 38 made of synthetic resin that is mounted by such a mounting device, and has slits formed at predetermined positions in the circumferential direction. FIG. 4 shows another polygrip washer 39,
This polygrip washer 39 is continuous in the circumferential direction. The polygrip washer 40 shown in FIG. 5 has a center hole that is not circular but irregularly shaped.

[0015] Polygrip washer 3 having such a shape
As shown in FIGS. 6 and 7, the bits 8 to 40 are skewered and held at the tip of the bit 20. As shown in FIGS. 6 and 7, the tip side of the bit 20 is formed with a tapered part 42 and an inverted tapered part 43 on the upper end thereof, and the upper end of the inverted tapered part 43 is a stepped part 44. . Further, a protrusion 45 constituting an engaging portion is formed on the distal end side of the bit 20, and is engaged with an engaged portion 46 of a mounting shaft 48, thereby performing positioning.

When the mounting device shown in FIG. 1 attached to the tip of the robot hand is lowered as a whole, the device shown in FIG.
As shown in FIG. 2, the bit 20 is inserted into the tip of the polygrip washer 38, and the polygrip washer 38 is held by the stepped portion 44 of the bit 20. At this time, the bit 20 moves upward in the cylindrical housing 10 while pressing the spring 14 due to the reaction force when it is inserted into the polygrip washer 38, and the stroke at this time detects the position of the dog 19. sensor 21
will be detected by.

Furthermore, at this time, since the sleeve 27 comes into contact with the upper surface of the polygrip washer 38 due to the weak biasing force of the spring 29, the position of the sleeve 27 relative to the bit 20 may cause the polygrip washer 38 to be mischucked or two or more washers The sensor 31 can detect that 38 is chucked. That is, the sensor 31 is the dog pin 1
Since the dog 30 is connected to the bit 20 via the pin 9 and the dog 30 is fixed to the cylindrical portion 28 of the sleeve 27, the above-mentioned detection is performed.

When the robot hand is then gently lowered, the tip of the bit 20 comes into contact with the upper end of the mounting shaft 48, as shown in FIG. At this time, the protrusion 45 on the tip side of the bit 20 comes to be engaged with the engaged portion 46 of the mounting shaft 48, thereby performing radial positioning. That is, it becomes possible to correctly position the bit 20, which holds the polygrip washer 38 in a skewered manner, in the radial direction with respect to the mounting shaft 48, and to position the center of both.

After this, the robot hand is further lowered. Since the bit 20 is in contact with the upper end of the mounting shaft 48, it cannot be lowered further, so as the cylindrical housing 10 lowers, it slides relatively upward while pushing the spring 14. . Then, the sleeve 27, which is pressed by the main body block 11 via the spring 29, descends and presses the upper surface of the polygrip washer 38 as shown in FIG.

During the initial stroke, the proximal cylindrical portion 28 of the sleeve 27 abuts against the pressing sleeve 34. Then, the sleeve 27 is pressed downward by the strong elastic restoring force of the spring 35. As a result, the polygrip washer 38 moves downward on the mounting shaft 48 as shown in FIG. 7, and is engaged with the engagement groove 47 and mounted as shown in FIG. Note that the relative position of the sleeve 27 with respect to the bit 20 is determined by the sensor 23 attached to the bit 20 detecting the detected plate 24 attached to the proximal cylindrical portion 28 of the sleeve 27. It will detect any stroke.

As described above, according to the mounting device according to this embodiment, the protrusion 45 is formed on the distal end side of the bit 20, and this protrusion 45 connects to the engaged portion on the distal end side of the mounting shaft 48. 46 for radial positioning. Therefore, when assembling the polygrip washers 38 to 40, quality problems such as curling up are reduced. In addition, when assembling the polygrip washer 38, in the case of an automatic machine, bit 2
0 with respect to the axis 48 becomes easy, and there is an advantage that a highly accurate positioning mechanism is not required for this purpose.

FIG. 9 shows a modification of the above embodiment, in which, contrary to the above embodiment, an engaging recess 52 is formed at the tip of the bit 20, and the mounting shaft is An engaged protrusion 53 is formed on the distal end side of the bit 48 to correctly position the bit 20 at the center of the mounting shaft 48. Therefore, even in such a configuration, it is possible to achieve the same effects as in the above embodiment.

[0023]

As described above, the present invention provides an engaging portion at the tip of the bit, and an engaged portion at the attachment position, and the bit is covered by the engaging portion and the engaged portion. It is designed to be positioned at the mounting position. Therefore, it becomes possible to attach the drop-off prevention ring to the mounting position while the bit is correctly positioned, and problems during assembly such as deformation of the drop-off prevention ring are reduced. Furthermore, a mechanism for highly accurate positioning on the device side becomes unnecessary.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing the overall structure of a drop-off prevention ring mounting device.

FIG. 2 is a bottom view of the same.

FIG. 3 is a perspective view of a polygrip washer.

FIG. 4 is a perspective view of a polygrip washer.

FIG. 5 is a perspective view of a polygrip washer.

FIG. 6 is a front view showing the operation of attaching a polygrip washer.

FIG. 7 is a front view showing the operation during installation.

FIG. 8 is a front view of a state in which attachment is completed.

FIG. 9 is a front view showing the relationship between a modified bit and a mounting shaft.

[Explanation of symbols]

10 Tubular housing 11 Main block 12 Screw 13 Holding body 14 Spring 17 Through hole 18 Rod 19 Dog pin 20 bits 21 Sensor 22 Mounting plate 23 Sensor 24 Detected plate 27 Sleeve 28 Base end cylindrical part 29 Spring 30 Dog 31 Sensor 34 Pressing sleeve 35 spring 36 Stopper 38~40 Polygrip washer 42 Taper part 43　Reverse taper part 44 Stepped section 45 Protrusion 46 Engaged part 47 Engagement groove 48 Mounting axis 52 Engagement recess 53 Engaged protrusion

Claims (1)

[Claims] 1. A drop-off prevention ring mounting device, which chucks the drop-off prevention ring by skewering it to the tip of a bit, and pushes out a sleeve on the outer peripheral side of the bit to attach the drop-off prevention ring to a part to be mounted. , an engaging part is provided at the tip of the bit, and an engaged part is provided at the attached position, and the bit is positioned at the attached part by the engaging part and the engaged part. A device for attaching a fall-off prevention ring.