JP2001263555A - Rubber band fitting method to pipe joint inside face and its device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To respond to pipe joints of various types of inside diameters without being affected by the dimension of a rubber band. SOLUTION: The rubber band Q is received by a support rod 25 while a presser rod 27 and a restoring rod 28 are made to pass through the rubber band Q with their clamped by the rubber band (Figure (a)). The presser rod 27 and the restoring rod 28 are lowered to shape the rubber band Q into a heart shape and inserted into a collar (pipe joint) C with their shaped into the heart shape (Figure (b)). When the both rods 27 and 28 are raised, the rubber band Q is restored into a circular shape by its elastic force and if the both rods 27 and 28 are drawn out on the way to the restoration, the rubber Q is laid tightly along the inside face of the collar C as shown in a chain line of Figure (c). Then, adhesive is applied to the inside face of the collar C and smooth the inside face whole circumference of the rubber band Q and a roller is rolled so that the rubber band Q is stuck and fixed to the inside face of the collar C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for attaching a rubber ring to an inner peripheral surface of a pipe joint.

[0002]

2. Description of the Related Art For example, cable conduits, fluid transport conduits, etc.
The pipe joint structure of reinforced fiber plastic pipe used for
As shown in FIG.
Wheel Q ₁, Q_TwoAnd fix one end of the color C (go
Wheel Q₁Side) one tube P₁Shape one end
And the other tube P_TwoOne end of the port (color C rubber
Wheel Q_TwoSide) from the solid line to the chain line.
You.

Conventionally, the rubber ring Q _1, attached to the pipe joint C of Q ₂ are manually, after an adhesive is applied to the rubber ring bonding surface of the pipe joint C, the rubber ring Q _1, Q ₂ tubes It is performed by inserting the joint into the joint C and further pressing and fixing the rubber rings Q ₁ and Q ₂ by hand.

[0004] Although the rubber ring mounting by manual operation has a work procedure, the degree of mounting (accuracy) differs depending on the operator, and since there are many types of rubber rings Q ₁ and Q ₂ to be mounted, uniform mounting is performed. It is difficult to get the status. Also, manual work is poor in workability and complicated.

For this reason, Japanese Patent Application Laid-Open Nos. 10-132165 and 10-285031 disclose techniques for automatically bonding and fixing the rubber ring to a pipe joint. I have.

[0006] The technique described in Japanese Patent Application Laid-Open Publication No. H11-157, discloses a technique in which a plurality of telescopic radial rods having a rubber ring receiving roll at the tip and a rubber ring received by a roll group of these rods are traversed when the rod is shortened. A rubber ring boring means which detaches from the rubber ring when extended is provided so as to be able to enter and exit the pipe joint.

[0007] In the technique described in Japanese Patent Application Laid-Open Publication No. H08-209, the diameter of a ring whose diameter can be expanded and contracted is reduced, and a rubber ring is inserted and arranged on the outer periphery thereof. In addition, the collar is inserted through the rubber ring arrangement reduced diameter ring, the ring is further expanded, the rubber ring is pressed into contact with the inner peripheral surface of the collar, the whole is heated, and the rubber ring is pressed with the adhesive to form the collar. The ring is adhered to the inner peripheral surface, and then the diameter of the ring is reduced to separate the rubber ring attachment collar from the ring.

[0008]

The technique described in Publication 1 is
The apparatus itself becomes large, and it is difficult to use it for small-diameter pipe joints. Further, the technique described in Publication 2 requires a ring having an outer diameter corresponding to the inner diameter of each collar because the pressing contact ring is brought into contact with the inner surface of the collar via a rubber ring, which is costly. At the same time, the replacement of the ring is complicated.

SUMMARY OF THE INVENTION In view of the above circumstances, it is an object of the present invention to reduce the cost and make it easy to cope with a pipe joint of each inner diameter.

[0010]

In order to achieve the above object, the present invention first focuses on the resilience of a rubber ring to a circular state, and attaches the rubber ring to a circular shape along the inner surface of a pipe joint to be attached. It was decided. The rubber ring has elasticity and returns to a circular state when the external force is released after the rubber ring is slacked. For this reason, after selecting a rubber ring of the size corresponding to the pipe joint, piercing the rubber ring and putting it in the pipe joint,
If the released rubber ring is released, it will follow the inner surface with elasticity (restoring force).

Next, the present invention suspends (supports) the rubber ring with at least two right and left rods and lifts and lowers another rod between the rods in order to lift and release the rubber ring. The rubber ring was inserted into a required position of the pipe joint while the bulk of the rubber ring was reduced by lowering the part of the rubber ring to separate each rod from the rubber ring. This boring / releasing can be performed irrespective of the size of the rubber ring as long as the rubber ring can be hung on the rod and can be bent.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of the present invention, in a device for mounting a circular rubber ring on the inner peripheral surface of a pipe joint along its elasticity, a left and right rubber ring support rods are mounted on a base and forward. Along with protruding, the rubber ring pressing rod and the rubber ring restoring rod are vertically provided between the two rubber ring supporting rods and are provided so as to be able to move up and down by a driving machine, and each of the rods is movable forward and backward. A configuration may be employed.

According to this configuration, in a state where the adhesive is applied to the rubber ring mounting portion on the inner surface of the pipe joint, the rubber ring is hooked on both support rods through the space between the rubber ring pressing rod and the restoration rod. Lower the rubber ring pressing rod and the restoration rod to deform a part of the rubber ring inward.In this state, move each rod forward to move the rubber ring to the required position in the pipe joint. The deformation of the rubber ring is partially eliminated by raising the wheel pressing rod and the restoration rod, and the rubber ring is applied to the inner surface of the pipe joint by its own circular restoring force. Leave from within. If the rubber ring is restored by itself with the rise of the pressing rod, the restoration rod is not necessarily required.

By restoring the rubber ring to a circular state, the rubber ring is attached to the inner surface of the pipe joint with an adhesive.
This mounting state is not sufficient because it depends only on the elastic restoring force. As in the conventional case, the rubber ring is pressed into contact with the inner surface of the pipe joint by hand, using a leveling roller.
In addition to the manual operation, a rubber roller pressing device including a receiving roller on which a pipe joint with a rubber ring is mounted and driven to rotate and a leveling roller inserted into the pipe joint and pressed against the rubber ring is provided. Then, a configuration in which the roller is rolled and pressed against the inner peripheral surface of the rubber ring can be adopted. If this device is used together, it is possible to automate until the attachment of the rubber ring is completed.

[0015]

1 to 7 show an embodiment of a rubber ring attaching device and a rubber ring pressing device according to the present invention. First, the rubber ring attaching device is shown in FIGS. 1, 2 and 3. FIG. As described above, the collar C is sequentially fed to the rubber ring Q (Q ₁ , Q ₂ ) mounting position by the conveyor D such as a roller conveyor, and the base 10 which can advance and retreat toward the mounting position is provided on the base G. The base 10 is moved left and right by a cylinder (not shown) as indicated by an arrow in FIG. A shaft 11 having an inner surface formed as a spline is erected on the base 10, and a main cylinder 12 is provided at an upper end of the shaft 11 via a mounting bracket 13.

The rod 12a of the main cylinder 12 is connected to an upper slider 14 which is spline-coupled to the shaft 11, and a lifting rod 15 extends downward from the upper slider 14.
A lower slider 16 that is spline-connected to the shaft 11 is fixed to the lower end of the lower slider 16. Therefore, the upper and lower sliders 14 and 16 are moved up and down at a predetermined interval by the expansion and contraction of the rod 12a. A slit 18 is formed on the rear surface of the shaft 11 (the right side surface in FIG. 2) in accordance with the elevating length of the upper and lower sliders 14 and 16.
The four and sixteen arms 14a, 16a protrude. A ring-shaped first moving body 19 is fitted on the shaft 11 between the upper and lower sliders 14 and 16 so as to be able to move up and down.

The arm 14a of the upper slider 14 is provided with a sub-cylinder 20, and its rod 20a is connected to the arm 19a of the first moving body 19.
0a, the first moving body 1
9 goes up and down. An arm 21 projects from the left side surface of the cylinder mounting bracket 13 (see FIG. 1), and an auxiliary cylinder 22 is provided on the arm 21.
The upper end of the first moving body 19 is locked to the rod 22a in the extended state, so that the elevation of the sub cylinder 20 is stopped in the middle of the stroke. That is, the intermediate position of the moving body 19 is determined by the cylinder 22.

A ring-shaped second moving body 23 is fixed to the arm 16a of the lower slider 16, and the second moving body 23
Is fitted on the shaft 11 so as to be able to move up and down. A standing plate 24 is provided on the front surface of the second moving body 23, and support bars 25, 25 of a rubber ring Q are provided on the left and right of the standing plate 24 so as to protrude forward. The support rod 25 is attached to the upright plate 24 by screwing. The screw hole 26 is selected and the position of the support rod 25 is adjusted to adapt to the size of the rubber ring Q. The number and positions of the screw holes 26 are arbitrary. A rubber ring pressing rod 27 and a rubber ring receiving rod (restoring rod) 28 are provided on the front surface of the first moving body 19 so as to protrude forward. The two rods 27 and 28 are also screwed into the screw holes 29, and the rubber ring Q is selected by selecting the screw holes 29 and adjusting the positions of the both rods 27 and 28.
Adapt to the size of. The number and position of the screw holes 29 are also arbitrary.

Next, the structure of the rubber ring pressing device will be described. The rubber ring pressing device is installed at the rear stage of the rubber ring mounting device along the above-mentioned conveyor D, and as shown in FIGS. A base 30 capable of moving forward and backward is provided on the base G, and a spline shaft 31 is provided on the base 30 so that the main cylinder 3
Two rods extend through the shaft 31. A slider 34 is fixed to the rod, and an auxiliary cylinder 40 is provided on the arm 34a. The rod 40a of the sub cylinder 40 is connected to the arm 39a of the moving body 39 movably fitted to the shaft 31.
It moves up and down by expansion and contraction of a. On the front surface of the moving body 39, a rubber ring shaping roller (a smoothing roller) 50 is provided to protrude forward.

This embodiment is configured as described above, and its operation will now be described. As shown in FIG. 3 (a), when the collar C is located at the mounting position of the rubber ring Q by the conveyor D, and the rubber ring Q is transported by the rubber hanger 60 above the first moving body. 1
In the state where 9 is in the intermediate position, the first and second moving bodies 19 and 23 are raised by the cylinder 12 and, in that state, the base 10
Moves forward (to the left in the figure). By this movement, FIG.
As shown in (a), the support rods 25, 25 are inserted into the rubber ring Q on the hanger 60, and the rubber ring pressing rod 27 and the receiving rod 28 enter the upper and lower ends of the rubber ring Q.
At this time, the support rods 61 of the hanger 60 are provided in pairs at both ends so as not to hinder the movement as indicated by the chain line in FIG.

Next, the rod 22a of the auxiliary cylinder 22
3B, the first moving body 19 is raised by the sub-cylinder 20, as shown by the chain line in FIG. 3B, and the pressing rod 27 and the receiving rod 28 are also raised to move the rubber ring Q from the hanger rod 61 to its own side. Subsequently, the base 10 retreats as shown by the solid line in FIG. Thereafter, the upper and lower sliders 1 are moved by the main cylinder 12.
4 and 16, the rod 20a of the auxiliary cylinder 20 is extended, and as shown in FIG.
7. Lower the receiving rod 28 with respect to the supporting rod 25 to make the rubber ring Q
In the shape of a heart into a color C.

When the rod 12a of the main cylinder 12 is extended, as shown in FIG.
Then, as shown in FIG. 3D, the base 10 moves forward to put the rubber ring Q into the collar C, and when the base 10 enters, the rod 20a of the sub cylinder 20 is moved.
As shown in FIG. 4C, the pressing rod 27 and the receiving rod 28 rise, and the rubber ring Q returns to a circular shape. At this time, the rod 22a of the auxiliary cylinder 22 is extended in advance to bring the first moving body 19 to the intermediate position, and in this state, the base 10 is retracted to return to the original position. When each of the rods 25, 27, and 28 retreats from the rubber ring Q, the rubber ring Q becomes circular over the entire circumference due to its elasticity and comes into contact with the inner surface of the collar C as shown by a chain line in FIG. Note that the adhesive of the rubber ring Q is applied to the inner surface of the collar C in advance.

The collar C to which the rubber ring Q is attached is moved by the conveyor D to the next pressure contact position. Then, FIG.
As shown by the arrow, the base 30 moves forward, inserts the rubber-coated shaping roller 50 into the collar C, and extends the rod 40a of the sub-cylinder 40, as shown in FIG. Crimp. At this time, the pressing roller 51 is moved by a cylinder (not shown) so that the color C
, And one of the receiving rollers 52 of the conveyor D is rotated by a driving device (not shown), and the driving rotation causes the rubber ring Q to be firmly and smoothly adhered to the inner surface of the collar C.

After the required rotation of the collar C, the rod 40a of the auxiliary cylinder 40 contracts, and the base 30 moves rearward to return to the original position. The color C after the rubber ring shaping is sent to a required position by the conveyor D. The above operation is repeated, and the rubber ring Q is continuously attached to the collar C.

[0025]

According to the present invention, the rubber ring is attached to the pipe joint by traversing and releasing as described above. Therefore, the present invention is less affected by the size of the rubber ring and can be used for various types of pipe joints. Can be done.

[Brief description of the drawings]

FIG. 1 is a front view of a rubber ring mounting device according to an embodiment.

FIG. 2 is a right side view of a main part cutaway of the embodiment.

FIG. 3a is an operation diagram of the embodiment.

FIG. 3B is an operation diagram of the embodiment.

FIG. 3c is an operation diagram of the embodiment.

FIG. 3d is an operation diagram of the embodiment.

FIG. 4 is an operation diagram of the embodiment.

FIG. 5 is a front view of the rubber ring pressing apparatus of the embodiment.

FIG. 6 is a right side view of the embodiment.

FIG. 7 is an operation diagram of the embodiment.

FIG. 8 is a schematic sectional view of a pipe joint structure.

[Explanation of symbols]

 C Collar (Piping) Q Rubber ring 10 Base 11 Spline shaft 12 Main cylinder 12a Main cylinder rod 14 Upper slider 14a Upper slider arm 15 Lifting rod 16 Lower slider 16a Lower slider arm 18 Slit 19 First moving body 20 Secondary cylinder 20a Secondary cylinder rod 22 Auxiliary cylinder 22a Auxiliary cylinder rod 23 Second moving body 25 Rubber ring support rod 26 Screw hole 27 Rubber ring pressing rod 28 Rubber ring receiving rod (recovery rod) 29 Screw hole 30 Base 31 Spline shaft 32 Main cylinder 39 Moving body 40 Secondary cylinder 50 Rubber ring shaping roller (leveling roller) 60 Rubber ring hanger 61 Rubber ring hanger rod

Continuation of front page (72) Inventor Masaya Kasamoto, Korimoto Kasei Kogyo Co., Ltd. 1-12-19 Kitahorie, Nishi-ku, Osaka-shi (72) Inventor Ryu Kajikawa Rika Karimoto, 1-112-19 Kitahorie, Nishi-ku, Osaka-shi Inside Industrial Co., Ltd. (72) Inventor Takeshi Kitagawa 1-12-19 Kitahorie, Nishi-ku, Osaka City Kurimoto Kasei Co., Ltd. Within Seiko Kogyo Co., Ltd. (72) Inventor Tsuyoshi Naito 1-12-19 Kitahorie, Nishi-ku, Osaka City Kurimoto Kasei Kogyo Co., Ltd. F-term in Kurimoto Iron Works (reference) 3C031 EE24 3H015 BA01 BB05 BC08

Claims (3)

[Claims] 1. A method of mounting a circular rubber ring Q on an inner peripheral surface of a pipe joint C by elasticity thereof, wherein the rubber ring Q
Are inserted and supported by the left and right support rods 25, 25, and the two support rods 2 are placed between the two support rods 25, 25 from above the rubber ring Q.
The pressing rod 27 is lowered with respect to 5 and 25, and the rubber ring Q is struck in a heart shape to reduce the size. After being inserted into the pipe joint C, the pressing rod 27 is raised and the pressing rod 2
7 and a method of attaching a rubber ring to the inner surface of a pipe joint by pulling out the support rods 25 and 25 from the pipe joint C and mounting the rubber ring Q along the inner peripheral surface of the pipe joint C by its circular restoring force. 2. A device for mounting a circular rubber ring Q on the inner peripheral surface of a pipe joint C along its elasticity, wherein left and right rubber ring support rods 25 are provided on a base 10 so as to protrude forward. And both rubber ring support rods 25, 25
A rubber ring pressing rod 27 is protruded forward above and between the rods 25, 25, 27.
Can be moved back and forth. After the rubber ring Q is hooked on both support rods 25 and 25 under the rubber ring pressing rod 27, the rubber ring pressing rod 27
Is lowered to deform a part of the rubber ring Q inward. In this state, the rods 25, 25, and 27 are moved forward to position the rubber ring Q at a required position in the pipe joint C. The rubber ring pressing rod 27 is raised to eliminate the partial deformation of the rubber ring Q, and the rubber ring Q is applied to the inner surface of the pipe joint C by its own circular restoring force. An apparatus for attaching a rubber ring to the inner surface of a pipe joint in which 27 is retracted so as to retreat from the inside of the pipe joint C. 3. A rubber ring pressure welding device combined with the rubber ring mounting device according to claim 2, wherein a receiving roller 52 on which the pipe joint C to which the rubber ring Q is mounted is driven to rotate. And a leveling roller 50 inserted into the pipe joint C and pressed against the rubber ring Q.