JP2002098280A - Shield material fitting device for corrugated pipe and ring-like shield material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for fitting a ring-like shield material having the high water-tightness to a corrugated pipe. SOLUTION: This device for fitting a ring-like shield material to the peripheral part of a corrugated pipe is provided with a holder device for holding an outer peripheral part of the ring-like shield material. A part of the holder device to be brought in contact with the shield material when holding the shield material with the holder device is formed into a similar shape with a side surface A of the shield material or a similar shape with the side surface and the inside surface B so as to hold the shield material, and thereafter, the contact part is enlarged to the outer peripheral side, and the corrugated pipe is moved to the predetermined position inside of the ring of the shield material. Thereafter, the shield material is released and fitted to the corrugated pipe.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for attaching a shield material to an outer peripheral portion of a corrugated pipe for the purpose of improving adhesion to a pipe joint and a ring-shaped shield material thereof.

[0002]

2. Description of the Related Art There are two methods of connecting pipes for water supply and drainage for civil engineering: a method using a joint and a method in which the end of a pipe is widened to an outside diameter of the pipe, and the other end of the pipe is provided with a non-widened outside diameter. Although there is a method of inserting an end portion, a method of connecting with a joint is generally used for a corrugated pipe due to difficulty in widening the pipe end.

However, when a joint or the like is used, when a liquid such as water flows in the joint, water leakage occurs as it is due to an error between the outer diameter of the corrugated pipe and the inner diameter of the joint. For this reason, a method of attaching a ring-shaped rubber packing to the outer periphery of the pipe as a shield material for preventing water leakage may be adopted, but the mounting method is to manually insert the rubber packing from the pipe end while widening the rubber packing. And widening jigs are inserted from the inside and the ring is inserted while expanding.

[0004]

Further, when the outer diameter is large, a large force is required to widen the ring-shaped rubber packing, and it is practically difficult to mount the ring-shaped rubber packing by hand, and a rod-shaped shielding material having rubber elasticity is required. And the ends are glued or overlapped to attach a joint from the outer periphery.

[0005] Therefore, there are various problems such as the adhesion of the shield material is weak and the waterproof performance is deteriorated, the work of attaching the shield material must be performed at a construction site where piping is installed, and the reliability of the construction. Before shipping from the factory or the pipe stocking area, there was a need for a method of attaching the shielding material easily and with reliable waterproof performance.

Further, in the method of inserting and expanding the widening jig into the ring-shaped shield material, the shield material on the jig must be slid, which damages the lower bottom of the shield material and adversely affects the adhesion. Since the shield material rotates, only a cross-sectional shape such as a circle having little influence on the adhesion even when rotated can be used, and it is insufficient in terms of waterproofness.

The present invention solves such a problem in such a conventional method of attaching a shield material, and makes it possible to attach a highly elastic shield material in order to enhance adhesion. Another object of the present invention is to make it possible to attach a shield material having a different shape such as a rib-like projection attached to a cross section of the shield material.

[0008]

According to the present invention, there is provided an apparatus for attaching a ring-shaped shield material to an outer peripheral portion of a corrugated pipe. When the shield material is held by the holding receiving device from the outer peripheral side, the contact portion between the holding receiving device and the shielding material has the same shape as the side surface (A) of the shielding material, or Shield material holding device that has the same shape as the inner surface (B) so that it can hold the shield material, then expands to the outer peripheral side, moves the corrugated pipe to the predetermined position of the shield material, and opens the holding / receiving device. And

Thus, it is possible to mount the shield material at a predetermined position without damaging the lower bottom of the shield material due to rubbing or the like and without giving rotation. In addition, by making the shape of the claw of the holding receiving device substantially the same as the shape of the outer peripheral portion of the shield material,
The shield material that emphasizes adhesion can be widened and attached without damaging the shape.The opening / closing mechanism of the holding receiver securely holds the ring-shaped shield material, making it possible to mount the ring for large-diameter pipes. Even when a strong force is required when widening, the holder is not opened or closed by using the rotation axis of the holder, without using an external force such as a spring. I went to tighten.

This makes it possible to use various shapes of the shield material, and to use an elastic body having rib-shaped protrusions on the outer peripheral surface (C) of the shield material.

The shape of the shield material is a ring shape filling the valley of the corrugated pipe, and the connection parts and the shield material, and the shield material and the corrugated pipe are simultaneously crimped without any gap with the shield material attached. Therefore, a general elastic body can be used. The cross-sectional shape of the shield material is to supplement the adhesion between the connection component and the outer peripheral portion of the main body. As shown in FIG. 5, a conventional circular shape (51) can be used, but in order to improve the adhesion with the connection component. One having a rib-shaped protrusion (53) on the outer surface (D), one having a rib-shaped protrusion on the side surface (54) to improve the adhesion between the corrugated pipe side surface and the shield material, Those having substantially the same shape (52) as the shape of the attached pipe can be used. The shape of the rib-shaped protrusion may be any shape such as a semicircle, a square, or a triangle, and it is sufficient that the rib shape is deformed when crimped between the corrugated tube and the connection component, so that no gap is generated between the ribs.

Examples of the elastic body to be used include rubber and elastomer. Examples of the rubber include natural rubber and synthetic rubber. Among the synthetic rubbers, butadiene rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, ethylene-propylene rubber, butyl rubber, halogenated butyl rubber, chloroprene rubber, polysulfide rubber, fluorine rubber, acrylic rubber Rubber, silicon rubber, urethane rubber, chlorosulfonated polyethylene, chlorinated polyethylene, epichlorohydrin rubber, and the like. Examples of the elastomer include polystyrene, polyolefin, PVC, polyester, and polyurethane.
Examples include polyamide-based, fluoropolymer-based, homopolymer-based ionomer-based, and alloy-based elastomers.

[0013]

[Function] When a large tension is required for widening a large-diameter shield material, or when a deformed shield material with ribs is used to improve the adhesion of the shield material,
The shield material can be securely held in the shield receiving device, and the contact part of the magnifying device has the same shape as the contact part with the shield material. It can be attached to a predetermined position on the outer periphery of the corrugated pipe.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of an embodiment of the present invention, and FIGS. 2, 3 and 4 are explanatory diagrams of the operation. In FIG. 1, reference numeral 1 denotes a corrugated pipe to which a shield material is to be attached,
Reference numerals 2 and 3 denote claws of the holding / receiving device which are gripped when the shield material is widened, 4 denotes a rotary shaft with a screw for claw opening / closing operation, 5 denotes a rotary shaft for radial expansion / contraction operation, and 6 denotes an elastic shield material. First, the shield material holding / receiving device is located at a position larger than the outer diameter of the shield material, and the claws for holding the shield material are open.

Next, the shield material is placed on the shield material receiving table 27 in FIG. 2, and the holding and receiving device releases the holding claws from four directions (in the case of a large-diameter tube, preferably six to eight directions). Then, approach and hold the shield material. 3 and 4 show the opening and closing mechanism. At this time, the clamping operation can be performed by spring pressure, but can be performed only by rotating the shaft of the holder. Therefore, the stress applied when expanding the shield material thereafter is applied only to the claw portion and the rotating shaft, and the force opposing the opening force between the two claws depends on the material strength of the holder and the rotating shaft portion. As a result, it is possible to give greater strength than a holding tool such as a spring.

At this time, the shape of the claws substantially matches the cross-sectional shape of the shielding material as shown in FIG. 3, and when this shielding material is attached to a corrugated tube, it is corrugated as shown at 52 in FIG. It can be made to substantially match the shape of the outer peripheral portion of the tube.

Next, when the holding and receiving device widens outward and becomes larger than the outer diameter of the corrugated pipe, it stops, and the corrugated pipe moves laterally into the ring and stops at a predetermined position. At this time, a stopper etc. is provided at a predetermined position, and when the corrugated pipe comes into contact with the stopper, the sensor works to stop the movement of the corrugated pipe, and at the same time, the holding receiving device approaches the outer diameter of the pipe while reducing the diameter of the shield material. Then, when approaching, it is opened and the shield material is attached to the pipe valley.

The holding and receiving apparatus returns to the initial state and stops, and the corrugated pipe is carried out of the apparatus at the same time when the shielding material is opened.

[0019]

According to the present invention, as described above in detail with reference to one embodiment, since the shield material is held from the outer peripheral portion, the shield material does not rub or rotate during mounting. , The shield material can be attached to the predetermined position, and the shape of the claws of the holding and receiving device is almost matched with the shape of the shield material, so even if there are rib-shaped protrusions, the external shape is not damaged. The shield material was attached with good adhesion. In addition, since the cross-sectional shape of the shield material can be freely designed, it is possible to use a shield material having better adhesion. For this reason, sufficient adhesiveness can be obtained for flowing a liquid such as water.

Also, as shown in 53 and 54 in FIG. 5, it is possible to use a shielding material having a rib-like projection on the upper bottom or side surface, so that even if the dimensional accuracy of the corrugated pipe or the connecting part is poor, it can be in close contact. Performance can be improved. For this reason, it is possible to use a ring-shaped shield material for a pipe such as a large-diameter pipe that requires a force of about 500 N or more, which can be performed by a person for widening the shield material.

In addition, since it is possible to mount a shield material using a strong elastic body, there is a slight water leak due to insufficient tightening in the conventional method, but a connection that can withstand the internal pressure water has become possible. Was.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a main part of an embodiment of the present invention.

FIG. 2 is a front view of the above-mentioned shield material receiving base. .

FIG. 3 is a side view of the shape of the claws of the shield material holder and the state where the shield material is held.

FIG. 4 is a side view showing a state where the shielding material is opened.

FIG. 5 is a cross-sectional view showing a shape of a shield material.

FIG. 6 is a mounting view according to a conventional method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Corrugated pipe main body, 2 Holding / receiving device claw 3 Holding / receiving device claw, 4 Holding / receiving device opening / closing rotary shaft, 5 Rotating shaft for ring-shaped shield material widening, 6 Ring-shaped shield material 27 Shield material receiving base, 61 Jig for widening 62 Jig for widening

Claims (2)

[Claims] 1. An apparatus for attaching a ring-shaped shield material to an outer peripheral portion of a corrugated pipe, comprising: a holding and receiving device for holding an outer peripheral portion of a ring-shaped shield material (shield material); When the contact portion of the holding receiving device with the shield material has the same shape as the side surface (A) of the shield material, or the shape of the side surface and the inner surface (B), and holds the shield material, the outer periphery After expanding to the side and moving the corrugated pipe to a predetermined position in the ring of the shielding material,
A shield material mounting device for a corrugated pipe, wherein the shield material is opened and attached to the corrugated pipe. 2. A ring-shaped shield material according to claim 1, wherein said shield material is an elastic body having a rib-shaped projection on an outer peripheral surface (C) of said shield material.