JPH09103924A - Seal ring attaching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device capable of automatically attaching a seal ring to a seal groove formed in the receiving inner periphery of a pipe. SOLUTION: An inserting device 30 having an inserting head 35, a guiding plate 37 attached to the front side of the inserting head 35 and a pair of forming rollers 39 provided between the tips of the guiding plate 37 and the inserting head 35 is arranged on the axial center extended line of a pipe P. A seal ring supporting device 20 and a pressurizing device 80 having a pressure pin 81 on the supporting device 20 are provided between the guiding plate 37 and a clamping device 1. A seal ring R is supported by the supporting device 20, the inserting device 30 is advanced and the guiding plate 37 is inserted into the seal ring R. The seal ring R is deformed inside by lowering the pressure pin 81, the seal ring R is inserted into the pipe P by advancing the inserting device 30 and the receiving inner periphery of the seal ring R is fitted in a sealing groove (a) by moving the forming roller 39 in an outer direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal ring mounting device for mounting a seal ring having elasticity in a seal groove provided in an inner circumference of a receiving opening of a pipe.

[0002]

2. Description of the Related Art In a pipeline for water supply and sewerage, in which a large number of pipes are sequentially connected by inserting a spigot into a synthetic resin pipe receiving port, the sealing groove provided on the inner circumference of the pipe receiving port is elastic. A seal ring is attached, and the inner periphery of the seal ring is brought into close contact with the outer periphery of the spigot of the pipe to prevent water leakage between the connecting portions of the pipe.

The seal ring is usually mounted in advance in the seal groove of the receiving port before connecting the pipes.

[0004]

By the way, since the outer diameter of the seal ring is larger than the inner diameter of the receiving port of the pipe, it is extremely difficult to mechanically mount it, and conventionally, it is done manually.

In this case, the elastic seal ring is reduced in diameter, and the reduced diameter state is retained and inserted into the receiving end of the pipe, and a part of the seal ring is fitted into the seal groove provided on the inner periphery of the receiving end. In the combined state, the seal ring is designed to return to its natural state by its own elasticity, and it takes a lot of time and effort to attach the seal ring.

Further, when the seal ring is fitted into the seal groove by its elasticity, the seal ring often tilts. At this time, the seal ring strongly presses the inner circumference of the receiving port, and since the seal ring made of rubber and the pipe made of synthetic resin have extremely poor slidability, the tilted seal ring is returned to the normal mounted state. It was extremely difficult.

An object of the present invention is to provide a seal ring mounting device which can automatically and accurately mount a seal ring in a seal groove provided on the inner circumference of a pipe receiving port.

[0008]

In order to solve the above-mentioned problems, according to the present invention, a clamp device for detachably holding a pipe and an elastic member coaxial with the axial center of the pipe held by the clamp device are provided. And a supporting device for supporting the seal ring having two sides, and the sealing ring supported by the supporting device is moved in two stages toward the receiving port of the pipe, and is held by the supporting device at the stop position of the first stage. The insertion device that inserts the seal ring into the receptacle, and when the first stage of the insertion device is stopped, a part of the seal ring is moved inward by the movement of the pressure pin parallel to the pipe axis in the pipe axial direction. The insertion device is provided with an insertion head that can be inserted into the pipe receiving end at the tip of the case opposite to the receiving end of the pipe. A circular guide plate is attached to the tip of the guide at intervals corresponding to the width dimension of the seal ring, and a guide groove into which the pressure pin can be inserted is provided from a part of the outer circumference of the guide plate in the radial direction. An opening / closing mechanism is provided between the insertion head and the guide plate to support a pair of forming rollers for receiving the inner circumference of the seal ring so as to be relatively movable, and to relatively move the pair of forming rollers in an approaching direction. The structure is provided in the case.

Further, a structure is provided in which a rotating means for rotating the case around the axis of the insertion head is provided with a stop position where the opening of the guide groove provided in the guide plate faces the pressure pin. There is.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a mounting device according to the present invention is a clamp device 1 for detachably holding a pipe P.
And a supply device 10 for supplying the seal ring R onto the extension line of the axial center of the pipe P held by the clamp device 1.
A support device 20 for receiving the lower part of the seal ring R supplied by the supply device 10, and an insertion device 30 for inserting the seal ring R supported by the support device 20 into the pipe P.
And a pressurizing device 80 for compressing and compressing the seal ring R before the seal ring R is inserted into the pipe P by the inserting device 30.

The clamp device 1 relatively moves each of a pair of arcuate holding pieces 2 along the outer circumference of the pipe P by a cylinder 3, and holds a position of the pipe A facing the outer circumference of the receiving port A by the pair of holding pieces 2. I am trying to do it.

Here, the pipe P is made of synthetic resin, and a seal groove a into which a seal ring R is fitted is formed on the inner periphery of the receiving port A thereof.

In the supply device 10 for the seal ring R, the suction head 11 for sucking a part of the outer periphery of the seal ring R is moved up and down by the operation of the cylinder 12, and the suction head 11 is lowered to cause the seal sucked by the suction head 11. The ring R is transferred onto the extension line of the axial center of the pipe P held by the clamp device 1. Although the supply of the seal ring R to the suction head 11 is omitted in the figure, the entire supply device 10 is provided between the discharge position of the seal ring carried in a fixed position by the ring conveyor and the position shown in FIG. The seal ring R at the discharge position is sucked by the suction head 11.

The support device 20 is provided below the supply device 10. As shown in FIGS. 1 and 2, the support device 20 is configured so that a support frame 21 is moved up and down by a cylinder 22. The support frame 21 is provided with two support plates 24, 24 on a receiving plate 23 for receiving the seal rings R, with a space between the opposing parts so that the seal ring R can be inserted. The cutout portion 25 is formed downward.

The support frame 21 is adapted to be moved up at the same time as or before the supply of the seal ring R by the supply device 10, and the seal ring R supplied by the supply device 10 is the above-mentioned. It is supplied into the support frame 21 and held on the extension line of the axis of the pipe P.

3 to 5 show the insertion device 30. The insertion device 30 includes a cylindrical case 34 rotatably supported by a piston rod 32 of a two-stage cylinder 31 via a bearing 33.
Having. The case 34 is arranged on the extension line of the axial center of the pipe P held by the clamp device 1.

The case 34 has an insertion head 35 that can be inserted into the receiving port A of the pipe P at the tip, and the guide plate 3 is provided on the tip surface of the insertion head 35 via a spacer 36.
7 is attached.

The guide plate 37 is composed of a circular plate which can be inserted inside the seal ring R, and the guide plate 37 is formed with a guide groove 38 extending in the radial direction from a part of the outer circumference.

An interval corresponding to the width dimension of the seal ring R is provided between the guide plate 37 and the tip end surface of the insertion head 35, and two forming rollers 39 are arranged within the interval.

The two forming rollers 39 are openably and closably supported, and are opened and closed by an opening and closing mechanism 40 incorporated in the case 34.

The forming roller 39 is supported by supporting the rear end portions of a pair of arms 41 incorporated in the insertion head 35 so as to be swingable about a support pin 42, and at the tip portions of the respective arm 41. The provided pin 43 is attached to the end plate 35a of the insertion head 35.
It is inserted into the arc-shaped long hole 44 formed in the above, and the forming roller 39 is rotatably supported by the end portion of the pin 43 which is inserted through the long hole 44 and faces the outside.

The opening / closing mechanism 40 of the forming roller 39 forms in the piston rod 32 of the two-stage cylinder 31 a cylinder chamber 45 extending axially from the tip end surface and a fluid supply passage 46 communicating with the cylinder chamber 45. A piston 47 and a spring 48 that presses the piston 47 rearward are incorporated in the cylinder chamber 45, a ring support 50 is provided on the front side of a rod 49 provided in the piston 47, and the ring support 50 is used as a spring 51. The opening / closing ring 52, which is rotatably supported by the ring support 50, is provided with a taper hole 53 while being pressed in the direction of the piston by the arm 41.
A cam pin 54 having a tapered tip is attached midway in each of the above.

On the rear end of the cam pin 54, 2
A pressing plate 55 having a length that straddles the cam pin 54 of the book is provided, and the pressing plate 55 is pressed down by the spring 56 to open the pair of arms 41.

The opening / closing mechanism 40 supplies a fluid from the fluid supply passage 46 into the cylinder chamber 45, presses the ring support 50 with the rod 49 moving together with the piston 47, and opens / closes the opening / closing ring 52 moving axially. The cam pin 54 is pressed inward by the inner periphery of the tapered hole 53, and the pair of arms 41 is pressed.
Is swung inward to close the pair of forming rollers 39.

The case 34 is rotated by a rotating device 57, and is stopped and held with the opening of the guide groove 38 formed in the guide plate 37 facing upward.

In the rotating device 57, the gear case 5 which covers the end portion of the case 34 on the piston rod 32 of the two-stage cylinder 31.
8, a pulley 61 driven by a motor 60 shown in FIG. 2 is rotatably attached to a drive shaft 59 rotatably supported on the lower portion of the gear case 58, and a pulley 61 is mounted between the pulley 61 and the drive shaft 59. A rotary clutch 62 is incorporated, and the rotation of the pulley 61 is transmitted to the drive shaft 59 by the operation of the single rotary clutch 62, and the rotation of the drive shaft 59 is transmitted to the case 34 through a pair of gears 63 and 64 meshing with each other. ing.

The one-rotation clutch 62 is shown in FIGS.
As shown in I) and (III), an outer ring 65 fixed to the pulley 61 and an inner ring 66 attached to the drive shaft 59 are provided, and a plurality of flat cam surfaces 67 are provided on the outer circumference of the inner ring 66. A roller 69 is incorporated between each cam surface 67 and the cylindrical inner surface 68 of the outer ring 65.

Further, a cam supporter 70 is attached to the drive shaft 59, and a trip piece 72 penetrating between the rollers 69 adjacent to the side surface of the trip cam 71 rotatably supported by the cam support 70 is integrally provided. A coil spring 73 is attached between 71 and the cam supporter 70.

Further, a rear end portion of a lever 74 provided on the outer periphery of the trip cam 71 is swingably supported around a pin 75, and the lever 74 is provided with an elastic force of a spring 76 so that the tip end of the lever 74 is moved. The trip cam 71 is brought into contact with the outer circumference of the trip cam 71, and the trip cam 71 is prevented from rotating by the engagement between the tip of the lever 74 and the protrusion 77 provided on the outer circumference of the trip cam 71.
The roller 69 by means of 2 to the cam surface 67 and the cylindrical inner surface 6
8 is held in a neutral state where it is not engaged. Further, a solenoid 78 is connected to the lever 74.

In the above-described one-rotation clutch, when the lever 74 is swung outward by the excitation of the solenoid 78 to release the detent of the trip cam 71, the trip cam 7 is released.
1 rotates relative to the inner ring 66, and the roller 69 engages the cam surface 67 and the cylindrical inner surface 68.
Is transmitted to the drive shaft 59, and the case 34 rotates.

After the case 34 is rotated, the solenoid 7
When the excitation of No. 8 is released, when the trip cam 71 makes one rotation, the protrusion portion 77 comes into contact with the lever 74 to prevent the trip cam 71 from rotating, and the relative rotation between the trip cam 71 and the inner ring 66 that coasts by inertia. The case 69 is stopped and held in a state where the roller 69 is in a neutral state, the rotation from the pulley 61 to the drive shaft 59 is blocked, and the opening of the guide groove 38 of the guide plate 37 faces upward.

Here, when the inertial force of the case 34 is large, the stop position of the case 34 may be displaced, and in order to eliminate the deviation, a brake shoe 90 is provided on the outer periphery of the case 34, as shown in FIG. The brake shoes 9
0 is constantly pressed against the case 34 by the elasticity of the spring 91 to give the case 34 a rotational resistance.

The two-stage cylinder 31 has a seal ring R in which a guide plate 37 is supported by a supporting device 20.
The position where the seal ring R and the facing portion of the insertion head 35 pass through the seal ring R and the guide plate 3
7 penetrates into the receiving port A of the pipe P clamped by the clamp device 1 and inserts the seal ring R into the insertion head 3
The case 34 is moved in two stages in the axial direction with both positions of the positions facing the seal groove a of the receiving port A between the facing portions of 5 as stop positions.

As shown in FIGS. 1 and 2, the pressure device 8
0 is a pressure pin 81 having an outer diameter that can be inserted into the guide groove 38 of the guide plate 37, a first cylinder 82 that moves the pressure pin 81 in the axial direction, and a clamp device for the first cylinder 82. Pipe P clamped by 1.
And a second cylinder 83 that moves up and down toward the axis of the.

The mounting device shown in the embodiment has the above structure, and its operation will be described below.

Now, when the clamp device 1 holds the receiving port A of the pipe P, the support frame 21 of the support device 20 is moved upward. When the support frame 21 stops on the axis of the pipe P, the suction pad 11 of the supply device 10 descends.

The seal ring R previously adsorbed by the adsorption pad 11 is inserted between the pair of support plates 24 of the support frame 21. When the seal ring R is supported by the receiving plate 23 of the support frame 21, the suction head 11 releases suction and is simultaneously moved upward.

When the seal ring R is supplied into the support frame 21 as described above, the two-stage cylinder 31 operates to move the case 34 forward by one step.

As the case 34 advances one step, the guide plate 37 is supported by the support frame 21 and the seal ring R is supported.
As shown in FIG. 8, the seal ring R is inserted between the guide plate 37 and the distal end surface of the insertion head 35 so as to face the seal ring R.

After stopping the case 34, the second pressurizing device 80
The cylinder 83 operates to lower the pressure pin 81. The tip of the pressurizing pin 81 contacts the upper part of the outer periphery of the seal ring R supported by the support frame 21 while descending,
While pushing down the contact portion, the rear end portion of the pressure pin 81 descends along the guide groove 38 of the guide plate 37.

The upper part of the seal ring R is deformed downward by the pressing of the pressure pin 81, and the inner circumference of the seal ring R abuts against the forming rollers 39 supported by the tip ends of the pair of arms 41, respectively. The space between the parts is deformed into a V shape by pressing down the pressure pin 81. The amount of deformation is the pressure pin 81.
The seal ring R is gradually deformed into a heart shape as it becomes smaller.

The pressurizing pin 81 has a lower limit stop position at a position where the upper part of the seal ring R abuts against the lower part or a position slightly before the lower end stop position. Fluid is supplied from the supply path 46 into the cylinder chamber 45.

By supplying the fluid into the cylinder chamber 45, the piston 47 moves forward, and the rod 49 presses the ring support 50 to move the opening / closing ring 52 together with the ring support 50.

When the opening / closing ring 52 is moved forward, the taper hole 53 formed in the ring 52 forms a pair of arms 41.
Each of the cam pins 54 attached to each is pressed inward. Therefore, the pair of arms 41 swings in the closing direction, and the portion of the seal ring R that comes into contact with the forming roller 39 is pushed inward, so that the space between the pair of forming rollers 39 of the seal ring R is as shown in FIG. The seal ring R is formed into a U-shape, and the diameter of the seal ring R is reduced by the formation so that the seal ring R can be inserted into the receiving port A of the pipe P.

After molding the seal ring R, the first cylinder 82 of the pressurizing device 80 is operated to move the pressurizing pin 81 backward, and when the pressurizing pin 81 is pulled out from the seal ring R, the second cylinder 83 is drawn. Operates to raise the first cylinder 82.

After the first cylinder 82 stops rising, the cylinder 22 of the support device 20 operates to lower the support frame 21.

After stopping the lowering of the support frame 21, the two-stage cylinder 3
1 operates to move the case 34 forward. Case 34
By the forward movement, the seal ring R after the diameter reduction is inserted into the receiving port A of the pipe P, and as shown in FIG. 13, when the seal ring R faces the seal groove a, the case 34 stops.

After stopping the case 34, the back pressure of the piston 47 in the cylinder chamber 45 is removed. By removing the back pressure, the piston 47 is retracted, and the ring support body 50 is also retracted by the pressing force of the spring 51.
2 also moves backward together with the ring support 50.

Since the pressing of the cam pin 54 is released by the backward movement of the opening / closing ring 52, the elastic force of the spring 56 causes the pair of arms 41 to swing in the opening direction as shown in FIGS. The roller 39 opens.

Since the pressing of the U-shaped deformed portion of the seal ring R is released by opening the molding roller 39, the seal ring R restores its shape to a circular natural state by its restoring elasticity, and the seal ring R is restored by the restoration. The outer peripheral portion of R fits into the seal groove a (see FIG. 14).

After the opening / closing ring 52 is retracted, the solenoid 78 shown in FIG.
Rock in a direction away from the outer periphery of the.

When the lever 74 swings outward, the pulley 61 is rotated through the one-rotation clutch 62.
9 is transmitted. The rotation of the drive shaft 59 is caused by the pair of gears 63,
Since it is transmitted to the case 34 via 64, the case 34
The rotation of the case 34 causes the molding roller 39 to rotate while pressing the inner circumference of the seal ring R outward as shown in FIG.

Therefore, if there is a portion where the seal ring R is incompletely fitted in the seal groove a, the portion is pushed by the molding roller 39, so that the portion is fitted in the seal groove a and the outer circumference of the seal ring R. The whole is fitted in the seal groove a.

When the drive shaft 59 starts to rotate, the solenoid 78 is deenergized, the lever 74 is deflected by the spring 76, and the tip end is pressed against the outer periphery of the trip cam 71.

Therefore, when the trip cam 71 makes one rotation, the projecting portion 77 of the trip cam 71 engages with the lever 74, and the trip cam 71 is prevented from rotating by the engagement, and the rotation transmission to the drive shaft 59 is achieved. The case 34 is stopped in a state in which it is blocked and the opening of the guide groove 38 of the guide plate 37 faces upward.

After one rotation of the case 34 is stopped, the two-stage cylinder 31 is actuated to move the case 34 backward, and as shown in FIG. 17, the pipe P is pulled out from the inside of the receiving port A, and the seal ring R is mounted. Complete.

[0058]

The present invention is configured as described above.
The seal ring can be automatically attached to the seal groove provided on the inner circumference of the receiving port of the pipe, which is effective for labor saving.

Further, since the diameter of the seal ring is reduced and expanded between the guide plate and the distal end surface of the insertion head, the seal ring is not twisted or distorted or tilted, and the seal ring is fitted to the seal groove. Can be installed correctly.

Further, after the seal ring is fitted into the seal groove by the restoring elasticity of itself, the molding roller is rolled along the inner circumference of the seal ring while pressing the inner circumference of the seal ring with the molding roller. Therefore, the seal ring can be mounted in the seal groove more accurately.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a sectional view showing the insertion device of the same.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3;

FIG. 5 is a sectional view taken along the line VV in FIG. 3;

FIG. 6 is a perspective view showing a part of an opening / closing mechanism of the molding roller of the same.

FIG. 7 shows the one-rotation clutch of the above, (I) is a sectional view, (II) is a vertical side view of (I), and (III) is a right side view of (I).

FIG. 8 is a sectional view showing a state in which a guide plate is inserted into the seal ring.

FIG. 9 is a sectional view taken along the line IX-IX in FIG. 8;

FIG. 10 is a cross-sectional view showing a molded state of the seal ring.

11 is a sectional view taken along the line XI-XI in FIG.

12 is a sectional view taken along line XII-XII in FIG.

FIG. 13 is a sectional view showing a state in which a seal ring is inserted in the pipe.

FIG. 14 is a sectional view showing a state in which a seal ring is fitted in a seal groove.

FIG. 15 is a sectional view taken along line XV-XV in FIG.

FIG. 16 is a cross-sectional view showing a molded state of the seal ring mounted in the seal groove.

FIG. 17 is a cross-sectional view showing a state where the seal ring is completely attached.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clamping device 20 Supporting device 30 Inserting device 35 Inserting head 37 Guide plate 38 Guide groove 39 Forming roller 40 Opening / closing mechanism 57 Rotating device 80 Pressing device 81 Pressing pin

Claims (2)

[Claims] 1. A clamp device for detachably holding a pipe, a support device for supporting a seal ring having elasticity coaxially with an axis of the pipe held by the clamp device, and a pipe receiving port. Moved to two stages,
An inserting device that holds the seal ring supported by the supporting device at the stop position of the first stage and inserts the seal ring into the receiving port of the pipe by moving the second stage, and a pipe when the first stage of the inserting device is stopped. A pressing device that presses a part of the seal ring inward by moving a pressing pin parallel to the shaft center of the pipe in the axial direction of the pipe. An insertion head that can be inserted into the pipe receiving port is provided at the tip of the, and circular guide plates are attached to the tip of the insertion head at intervals corresponding to the width dimension of the seal ring. Is provided with a guide groove into which the pressure pin can be inserted, and a pair of molding rollers for receiving the inner circumference of the seal ring is provided between the insertion head and the guide plate. To movably supported, the mounting device of the seal ring comprising an opening and closing mechanism for relatively moving in a direction toward the pair of forming rollers from structure provided within the case. 2. The rotating means for rotating the case around the axis of the insertion head, with the stop position being a position where the opening of the guide groove provided in the guide plate faces the pressure pin. Seal ring mounting device.