JP2000296424A - Rubber ring fitting method and device thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily fit a rubber ring on the outer peripheral surface of a rib pipe in a normal position. SOLUTION: Plural pins 14a, 14b, 14c, 14d which are arranged parallel to the tub-axis so as to abut on the inner peripheral surface of a rubber ring 11, are moved radially in diametrical direction to maintain the rubber ring in state where it is diameter-enlarged utilizing the respective pins as supports, and to position the rubber ring between ribs 13 of a rib pipe 12, namely an object to be rubber ring-fitted in the tube axis direction. The first pin 14a is drawn out in the tube axis direction, and a part of the diameter-reduced rubber ring 11 is fitted between the ribs, and in state where a part of the rubber ring is engagingly locked to the rib 13 in the tube axis direction, the adjacent pins 14b, 14c, 14d are sequentially drawn out, and the rubber ring 11 is slowly fitted between ribs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for mounting a rubber ring on a cylindrical body such as a rib pipe, and more particularly to a method and an apparatus for mounting a rubber ring.

[0002]

2. Description of the Related Art Conventionally, pipes such as vinyl pipes, rib pipes, iron pipes and the like have a joint structure in which one end of the pipe is used as a receiving port and the other end is used as an insertion port. Is inserted into the socket of the other tube. In order to ensure watertightness between the receiving port and the insertion port, a rubber ring as a sealing material is attached to the inner peripheral surface of the receiving port or the outer peripheral surface of the insertion port.

For example, as shown in FIG. 12, when the rubber ring 2 is attached to the insertion opening of the rib pipe 1, the diameter of the rubber ring 2 is expanded by human power, and the rubber ring 2 is temporarily attached to an end of the rib pipe 1, and then the rib 3 is attached. Are sequentially attached to a predetermined position.

[0004]

In the mounting operation, when going over the rib 3, the diameter of the rubber ring 2 is partially expanded, and a part of the expanded rubber ring 2 is moved to the next position beyond the rib 3. By moving the rubber ring 2 to the groove 4 and further expanding the diameter of the remaining part to exceed the rib 3, the rubber ring 2 is sequentially moved part by part.

[0005] For this reason, the rubber ring 2 is twisted during movement, and when the rubber ring 2 is mounted between the predetermined ribs 3, the inner peripheral surface of the rubber ring 2 is completely removed from the outer periphery of the rib pipe 1. The rubber ring 2 is not pressed against the surface, the shape of the outer peripheral surface of the rubber ring 2 is also distorted, and normal sealing performance may not be exhibited. An object of the present invention is to solve the above-described problems, and an object of the present invention is to provide a method and an apparatus for mounting a rubber ring capable of easily mounting a rubber ring in a normal posture on an outer peripheral surface of a pipe such as a rib pipe. I do.

[0006]

According to a first aspect of the present invention, there is provided a rubber ring mounting method according to the present invention, wherein a rubber ring is provided between ribs of a pipe having at least a pair of annular ribs on an outer peripheral surface. A plurality of pins that are to be mounted and that are in contact with the inner peripheral surface of the rubber ring and arranged parallel to the pipe axis are radially moved in the pipe radial direction, and the rubber ring is expanded with each pin as a support point. The rubber ring is positioned between the ribs to be mounted in the axial direction of the tube, and the first pin is pulled out in the axial direction of the tube, and a part of the rubber ring whose diameter is reduced is fitted between the ribs. A second pin adjacent to the first pin in the circumferential direction of the tube is pulled out in the direction of the tube axis in a state where a part of the rubber ring is locked by the rib in the direction of the tube axis, and the diameter of the rubber ring is reduced. Part between the ribs and pull out the adjacent pins sequentially. Is gradually which fit mounted between the ribs rubber ring Te.

According to a second aspect of the present invention, there is provided a method of mounting a rubber ring, wherein the rubber ring is mounted between ribs of a pipe having at least a pair of annular ribs on an outer peripheral surface thereof. The four pins that are placed in parallel with the pipe axis in abutment with the pipe are radially moved in the pipe radial direction, and the rubber ring is held in a rectangular state where the diameter is enlarged with each pin as a supporting point, and the rubber ring is mounted. Between the ribs, the pair of opposing pins is pulled out in the axial direction of the pipe, and the rubber ring is supported by the other pair of opposing pins. The other pair of pins is pulled out in the direction of the tube axis, and the diameter of the rubber ring is reduced in such a manner that the opposite portion is fitted between the ribs, and the opposing portions of the rubber ring are locked with the rib in the direction of the tube axis. The opposite parts of the fitting between the ribs Than it is.

According to a third aspect of the present invention, there is provided a method of mounting a rubber ring, wherein a rubber ring is mounted between ribs of a pipe having at least a pair of annular ribs on an outer peripheral surface thereof. A plurality of pins that are placed in parallel with the pipe axis in radial contact with the pipe are radially moved in the pipe radial direction, the rubber ring is held in a state where the diameter is expanded with each pin as a supporting point, and the rubber ring is attached to the rib to be mounted. Between the tubes in the axial direction of the pipe,
Move each pin in the pipe diameter direction toward the pipe axis to reduce the diameter of the rubber ring, fit a part of the rubber ring supported between each pin between the ribs, and remove the rubber ring between adjacent pins. All the pins are pulled out in the tube axis direction while being locked by the ribs in the tube axis direction, and a rubber ring whose diameter is reduced is fitted between the ribs.

According to a fourth aspect of the present invention, there is provided a rubber ring mounting robot hand for mounting a rubber ring on an outer peripheral surface of a pipe, which is mounted on a distal end of a robot arm to face an end of the pipe. A moving base device having at least three pedestals which reciprocate radially in a pipe radial direction from a pipe axis along guide means provided on the base part to be arranged, and a pipe shaft provided on each pedestal It comprises a plurality of drive means which move back and forth in the direction of the center, and a plurality of pins which are attached to the respective drive means and engage with the inner peripheral surface of a rubber ring arranged in parallel with the pipe axis.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. First, as shown in FIG. 5, as a pipe to which the rubber ring 11 is attached, there is a rib pipe 12 made of a plastic material, and the rib pipe 12 has annular ribs 13 on the outer peripheral surface at appropriate intervals in the pipe axis direction. The rubber ring 11 is mounted between predetermined ribs 13 of the rib pipe 11.

Hereinafter, a method of mounting the rubber ring 11 will be described with reference to FIGS. As shown in FIG. 6, a plurality of pins 14 arranged in parallel with the pipe axis, here four pins 14a, 14b, 14c, 14d, are in contact with the inner peripheral surface of the rubber ring 11 and each pin 14a , 14
The end faces of b, 14c, and 14d and one side face of the rubber ring 11 are arranged so as to coincide with each other in the pipe axis direction.

As shown in FIGS. 7A and 7B,
The diameter of the rubber ring 11 is expanded by radially moving the pins 14a, 14b, 14c, and 14d in the radial direction of the tube,
The rubber ring 11 is held in a rectangular shape using the pins 14a, 14b, 14c, and 14d as support points. In this state, the rubber ring 11 whose diameter has been increased is loosely fitted to the rib pipe 12, and the rubber ring 11 is positioned between the ribs 13 to be mounted in the tube axis direction.

Next, the first pin 14a is pulled out in the axial direction of the tube, and as shown in FIG.
A part of the rubber ring 11 supported by the above is fitted into the groove 15 between the ribs by its reduced diameter. Next, a part of the rubber ring 11 fitted in the groove 15 is
The first pin 14a in the pipe circumferential direction
Is pulled out in the axial direction of the pipe,
As shown in FIG. 8B, a part of the rubber ring 11 supported by the second pin 14b is fitted into the groove 15 between the ribs by reducing its diameter.

Next, in a state where a part of the rubber ring 11 fitted in the groove 15 is locked by the rib 13 in the axial direction of the tube,
The third pin 14c adjacent to the second pin 14b in the pipe circumferential direction is pulled out in the pipe axis direction, and as shown in FIG. 9A, the rubber ring 1 supported by the third pin 14c.
A part of 1 is fitted into the groove 15 between the ribs by its reduced diameter.

Next, in a state where a part of the rubber ring 11 fitted in the groove 15 is locked by the rib 13 in the axial direction of the tube,
The fourth pin 14d adjacent to the third pin 14c in the pipe circumferential direction is pulled out in the pipe axis direction, and the rubber ring 1 supported by the fourth pin 14d as shown in FIG. 9B.
A part of 1 is fitted into the groove 15 between the ribs by its reduced diameter.

Thus, the adjacent pins 14a, 14a
b, 14c, and 14d are sequentially pulled out to reduce the diameter of the rubber ring 11, and a part of the rubber ring 11 is sequentially fitted into the groove 15 between the ribs.
The rubber ring 11 can be easily mounted in a normal state in which the entire circumference of the inner peripheral surface 11a of the rubber ring 11 is securely in contact with the outer peripheral surface of the rib pipe 12 without twisting.

In the above-described embodiment, each pin 1
Although 4a, 14b, 14c, and 14d are sequentially pulled out from the adjacent one, it is also possible to attach the rubber ring 11 in the following procedure. That is, in a state where the rubber ring 11 is held in a rectangular state in which the diameter is enlarged with the pins 14a, 14b, 14c, and 14d as supporting points, the opposing first pin 14a and third pin 14c are simultaneously moved in the axial direction of the tube. And the first pin 14a and the third pin 14a as shown in FIG.
The opposing portions of the rubber ring 11 supported by the pins 14c are fitted into the grooves 15 between the ribs by reducing the diameter thereof.

Next, while opposing portions of the rubber ring 11 fitted into the grooves 15 are locked by ribs 13 in the axial direction of the tube, the other opposing second pins 14b and 14d are connected to the tube. The opposite portion of the rubber ring 11 supported by the second pin 14b and the fourth pin 14d is pulled out in the axial direction, and fitted to the groove 15 between the ribs by reducing the diameter thereof.

As described above, the opposing pins 14a and 14
By pulling out c or 14b and 14d at the same time, the opposing portions of the rubber ring 11 are simultaneously fitted in the grooves 15 between the ribs and mounted, so that the number of mounting steps is reduced. In addition, since the rubber ring 11 is always partially fitted into the groove 15, the rubber ring 11 is not twisted at the time of mounting, and the entire circumference of the inner peripheral surface 11a of the rubber ring 11 is The rubber ring 11 can be easily mounted in a normal state in which the rubber ring 11 reliably contacts the outer peripheral surface of the rubber ring 11.

Regardless of the embodiment described above, each pin 1
4a, 14b, 14c and 14d can be pulled out in the following procedure and the rubber ring 11 can be attached.
That is, the rubber ring 11 is connected to the pins 14a, 14b, 14
The rubber ring 11 is attached to the ribs 13 and the ribs 1 with the rubber ring 11 held in a rectangular state in which the diameter is increased using the c and 14d as support points.
3 is positioned in the groove axial direction in the tube axis direction.

Next, each of the pins 14a, 14b, 14c, 1
4d is moved toward the pipe axis in the pipe diameter direction to reduce the diameter of the rubber ring 11, and as shown in FIG.
A part of the rubber ring 11 supported between the ribs 4b, 14c, and 14d is fitted into the groove 15 between the ribs, and the adjacent pins 14a,
While the rubber ring 15 between 14b, 14c, 14d is locked by the rib 13 in the tube axis direction, all the pins 14a, 14b, 14c, 14d are simultaneously pulled out in the tube axis direction to reduce the diameter. 11 is the groove 15 between the ribs
Is to be fitted.

As described above, each of the pins 14a, 14b, 14
By pulling out c and 14d at the same time, the rubber ring 1
Since the opposing portions are simultaneously fitted into the grooves 15 between the ribs and mounted, the number of steps required for mounting is reduced. Moreover, since the rubber ring 11 is always partially fitted into the groove 15, the rubber ring 11 is not twisted at the time of mounting, and the inner circumferential surface 11 of the rubber ring 11 is not twisted.
The rubber ring 11 can be easily mounted in a normal state in which the entire circumference of a is securely in contact with the outer peripheral surface of the rib pipe 12.

In the configuration described above, the four pins 14
a, 14b, 14c and 14d, the pin 1
4 only needs to be at least three, and the number is not limited. Hereinafter, a robot hand as a device for mounting the rubber ring 11 will be described. 1 to 4, the robot arm 21 can be moved to an arbitrary position in three-dimensional coordinates, and the configuration thereof is a known industrial robot technology, and thus the description is omitted.

The robot hand 22 is a robot arm 2
1 has a base portion 23 to be attached to the tip of the base portion 2
3 is provided with a plurality of arms 24 extending radially in all directions. Each of the arm portions 24 connects the base member 23 to the rib pipe 1.
And a ball screw 27 for driving a pedestal 26 that reciprocates along each of the guides 25. Since the servo motor 28 and the speed reducer 29 provided on the base 23 simultaneously rotate the respective ball screws 27, the respective pedestals 26 simultaneously reciprocate in the pipe diameter direction along the respective guides 25.

Each pedestal 26 is provided with a cylinder device 30 which moves back and forth in the direction of the pipe axis. The cylinder device 30 is mounted on each cylinder device 30 and the pins 14a, 14b, 14c, 14
d is provided. Each pin 14a, 14b, 14c, 14
d moves back and forth in the axial direction of the pipe by driving each cylinder device 30. Hereinafter, the operation of the above configuration will be described.
The robot arm 21 is driven so that the robot hand 22 faces the rubber ring 11 placed on a flat surface, and each pin 1
4a, 14b, 14c, and 14d are arranged inside the rubber ring 11, and each pin 14a, 14b, 14c,
Positioning is performed so that the tip surface of 14d and one side surface of the rubber ring 11 coincide in the tube axis direction.

Next, the servo motor 28 and the speed reducer 29
Is driven to rotate the ball screw 27 to move each pedestal 26 outward in the radial direction of the tube along the guide 25, thereby radially moving each of the pins 14a, 14b, 14c, and 14d, and Each pin 14a on the inner peripheral surface,
14b, 14c, and 14d are engaged, and each pin 14a, 1
The rubber ring 11 is supported at four points by 4b, 14c and 14d.

The robot arm 21 is driven to lift the robot hand 22 in the horizontal direction, and each pin 14a, 14
By moving b, 14c, 14d more radially, as shown in FIG. 3, each pin 14a, 14b,
The rubber ring 11 is expanded and held in a rectangular shape with the support points 14c and 14d as supporting points. In this state, as shown in FIG.
The robot hand 22 is opposed to the end face of the rib pipe 12 horizontally supported by the holding device 31, and the rubber ring 11 whose diameter has been increased is loosely fitted to the rib pipe 12, and the rubber ring 11 is attached to the rib 13 to be mounted. And the rib 13 in the axial direction of the tube.

In this state, each pin 14a, 14b, 14c, 14d is pulled out by driving each cylinder device 30 according to the procedure of each method described above, and the rubber ring 11 is fitted into the groove 15 between the ribs 13. Attach together.

[0029]

As described above, according to the present invention, the rubber ring expanded by a plurality of pins is positioned in the groove between the ribs, and each pin is appropriately pulled out to partially reduce the diameter of the rubber ring. Since a part of the rubber ring is sequentially fitted in the groove between the ribs, the rubber ring is not twisted at the time of mounting, and the rubber ring can be securely mounted on the outer peripheral surface of the rib pipe in a normal state. .

[Brief description of the drawings]

FIG. 1 is a side view showing a configuration of a robot hand according to an embodiment of the present invention.

FIG. 2 is a front view of the robot hand according to the embodiment.

FIG. 3 is a schematic diagram showing a relationship between a rubber ring and a pin in the embodiment.

FIG. 4 is a side view showing a positional relationship between the robot hand and the rib pipe in the embodiment.

FIG. 5 is a schematic view of a rib pipe provided with a rubber ring according to the embodiment.

FIG. 6 is a schematic diagram showing a state where a rubber ring in the embodiment is positioned on a rib pipe.

FIG. 7A is a schematic diagram showing a state where a pin is engaged with a rubber ring, and FIG. 7B is a schematic diagram showing a state where the diameter of the rubber ring is expanded.

8A is a schematic diagram illustrating a state in which a rubber ring is supported by three pins, and FIG. 8B is a schematic diagram illustrating a state in which a rubber ring is supported by two pins.

9A is a schematic diagram illustrating a state where a rubber ring is supported by one pin, and FIG. 9B is a schematic diagram illustrating a state where a rubber ring is mounted.

FIG. 10 is a schematic diagram showing a state in which a rubber ring is supported by two pins in another embodiment.

FIG. 11 is a schematic diagram showing a state in which a rubber ring is supported by four pins in another embodiment.

FIG. 12 is a schematic view showing a defective mounting state of a conventional rubber ring.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Rubber ring 12 Rib pipe 13 Rib 14a, 14b, 14c, 14d Pin 15 Groove 21 Robot arm 22 Robot hand 23 Base material part 24 Arm part 25 Guide 26 Base 27 Ball screw 28 Servo motor 29 Reduction gear 30 Cylinder device

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Toshiyuki Hirano 1-47, Shizitsuhigashi 1-chome, Naniwa-ku, Osaka-shi, Osaka F-term (reference) 3C030 BB13 3F061 BA05 BB08 BB10 BE01 DB00

Claims (4)

[Claims] 1. A rubber ring is mounted between ribs of a tube having at least a pair of annular ribs provided on an outer peripheral surface thereof, and is arranged in parallel with a pipe axis in contact with an inner peripheral surface of the rubber ring. Move a plurality of pins radially in the radial direction of the tube, and hold the rubber ring in a state where the diameter is expanded with each pin as a support point,
The rubber ring is positioned between the ribs to be mounted in the tube axis direction, and the first pin is pulled out in the tube axis direction and a part of the rubber ring whose diameter is reduced is fitted between the ribs. With a part of the rubber ring locked by the rib, a second pin adjacent to the first pin in the circumferential direction of the pipe is pulled out in the axial direction of the pipe, and a part of the rubber ring whose diameter is reduced is fitted between the ribs. A method of attaching a rubber ring, wherein adjacent pins are sequentially pulled out and a rubber ring is gradually fitted between the ribs. 2. A rubber ring is mounted between the ribs of a tube having at least a pair of annular ribs provided on an outer peripheral surface thereof, the rubber ring being in contact with an inner peripheral surface of the rubber ring and being arranged parallel to the tube axis. The four pins are radially moved in the radial direction of the tube, the rubber ring is held in a rectangular state in which the diameter is expanded with each pin as a supporting point, and the rubber ring is positioned between the ribs to be mounted in the axial direction of the tube. With the pair of opposing pins pulled out in the axial direction of the tube, and the rubber ring supported by the other pair of opposing pins, the opposing portions of the rubber ring to be reduced in diameter are fitted between the ribs, and In a state where the opposing portions of the rubber ring in the axial direction are locked by the ribs, another pair of pins is pulled out in the tube axis direction, and the opposing portions of the rubber ring whose diameter is reduced are fitted between the ribs. A method of attaching a rubber ring. 3. A rubber ring is mounted between the ribs of a tube having at least a pair of annular ribs provided on an outer peripheral surface thereof, the rubber ring being in contact with an inner peripheral surface of the rubber ring and being arranged parallel to the tube axis. Move a plurality of pins radially in the radial direction of the tube, and hold the rubber ring in a state where the diameter is expanded with each pin as a support point,
A rubber ring is positioned between ribs to be mounted in the pipe axis direction, and each pin is moved in the pipe diameter direction toward the pipe axis to reduce the diameter of the rubber ring, and one of the rubber rings to be supported between the pins. Part is fitted between the ribs, and with the rubber ring between the adjacent pins locked by the rib in the tube axis direction, all the pins are pulled out in the tube axis direction, and the rubber ring whose diameter is reduced is inserted between the ribs. A rubber ring mounting method characterized by being fitted. 4. A base member mounted on an outer peripheral surface of a tube, the base member being mounted on a distal end of a robot arm and arranged to face an end of the tube, and a guide provided on the base member. A moving pedestal device having at least three pedestals that reciprocate radially from the pipe axis in the pipe radial direction along the means, a plurality of driving means provided on each pedestal and extending and retracting in the pipe axis direction; A plurality of pins which are attached to the means and are engaged with an inner peripheral surface of a rubber ring arranged in parallel with the pipe axis.