JP4681722B2 - Shielding material mounting device for corrugated pipe - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for attaching a shield material for the purpose of improving the adhesion to a pipe joint to the corrugated pipe outer periphery, and a ring-shaped shield material thereof.
[0002]
[Prior art]
For connection of pipes for water supply and drainage for civil engineering, the method using a joint and the pipe end are widened beyond the outer diameter of the pipe, and the other end of the unexpanded outer diameter is inserted into the end. There is a method, but in a corrugated pipe, a connection method using a joint is generally used because of the difficulty of widening the end of the pipe.
[0003]
However, when a joint is used, when a liquid such as water flows through the joint, water leaks 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, there is a case where a ring-shaped rubber packing is attached to the outer circumference of the pipe as a shielding material for preventing water leakage. However, the attachment method is a method in which the rubber packing is inserted from the pipe end while being widened manually. Alternatively, a widening jig is inserted from the inside and the ring is expanded while being inserted.
[0004]
[Problems to be solved by the invention]
In addition, when the outer diameter increases, a large force is required to widen the ring-shaped rubber packing, and it is practically difficult to attach it manually. The joints were attached from the outer periphery by overlapping.
[0005]
For this reason, there are various problems such as poor adhesion of the shield material and reduced waterproof performance, installation of the shield material at the construction site where piping is installed, and reliability of construction. Before shipping from the stock location, it was awaited how to attach the shield material with a reliable waterproof performance.
[0006]
Also, the method of expanding the widening jig by inserting it into the ring-shaped shield material has to slide the shield material on the jig, which will damage the lower bottom of the shield material, adversely affect the adhesion, and in some cases the shield material Therefore, only those having a cross-sectional shape such as a circle that has little influence on adhesion even when rotated can be used, which is insufficient in terms of waterproofness.
[0007]
The present invention solves such a problem in the conventional method of attaching a shield material, and makes it possible to attach a highly elastic shield material in order to enhance adhesion, An object of the present invention is to make it possible to attach an irregularly shaped shield material in which rib-like protrusions are attached to the cross section of the material.
[0008]
[Means for Solving the Problems]
In order to solve this object, in the present invention, in a device for attaching a ring-shaped shield material to the outer peripheral portion of a corrugated tube, the contact portion with the shield material is the same as the shape of the side surface of the shield material, or the side surface and the inner side . A holding receiving device that has the same shape as the surface, has at least four claws that contact at least the side surface of the shield material and holds the shield material from the outer surface direction , and a rotating shaft that opens and closes and moves each nail. , widening the by rotating the rotary shaft, until after held clamped shielding member by said claw, larger than the outer diameter of the corrugated tube the shielding member is moved in a direction away pawls mutually And after moving a corrugated pipe to the predetermined position in the ring of a shield material, it was set as the structure which the said nail | claw open | releases a shield material and attaches to a corrugated pipe .
[0009]
As a result, the lower base of the shield material is not damaged by rubbing or the like, and attachment to a predetermined position is possible without giving rotation. In addition, by making the shape of the nail of the holding receiver almost the same as the shape of the outer periphery of the shield material, it is possible to widen and attach the shield material to the shape of the shield material that places importance on adhesion without damaging the shape. In addition, the opening and closing mechanism of the holding receptacle securely holds the ring-shaped shield material, so that the holding receptacle is not released even when a large force is required when widening like a ring for large-diameter pipes. The tool was opened and closed by using the rotation of the rotating shaft of the holding receptacle without using an external force such as a spring.
[0010]
As a result, various shapes of the shield material can be used, and an elastic body having rib-like protrusions on the outer peripheral surface (C) of the shield material can be used.
[0011]
The shape of the shield material is a ring shape that fills the valley of the corrugated tube, and when the shield material is attached, the connecting component and shield material, and the shield material and the corrugated tube can be crimped at the same time without any gaps. A general elastic body can be used. The cross-sectional shape of the shield material supplements the adhesion between the connection component and the outer periphery of the main body. As shown in FIG. 5, the conventional circular (51) can be used, but in order to improve the adhesion with the connection component. Those having rib-like projections (53) on the outer surface (D), those having rib-like projections on the side surface (54) in order to improve the adhesion between the side surface of the corrugated tube and the shielding material, Those having the same shape (52) as the attachment tube can be used. The shape of the rib-like 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 the corrugated tube and the connecting part are pressure-bonded and no gap is generated therebetween.
[0012]
Examples of the elastic body used include rubbers and elastomers. In addition, there are natural rubber and synthetic rubber as rubber, but synthetic rubber is butadiene rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, ethylene-propylene rubber, butyl rubber, halogenated butyl rubber, chloroprene rubber, polysulfide rubber, fluorine rubber, acrylic rubber. Examples include rubber, silicon rubber, urethane rubber, chlorosulfonated polyethylene, chlorinated polyethylene, epichlorohydrin rubber, etc., and elastomers such as polystyrene, polyolefin, PVC, polyester, polyurethane, polyamide, and fluoropolymer. , Homopolymer ionomers, alloy elastomers, and the like.
[0013]
[Action]
When large tension is required to widen the large-diameter shield material, or when using a deformed shield material with ribs to improve the adhesion of the shield material, ensure that the shield material is attached to the shield receiving device. Since the contact part of the magnifying device has the same shape as that of the contact part with the shield material, it can be held at a predetermined position on the outer periphery of the corrugated tube without being rotated or twisted. Can be attached.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described 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 its operation. In FIG. 1, 1 is a corrugated tube to which a shield material is to be attached, 2 is a claw of a holding receiving device that is gripped when the shield material is widened, 4 is a rotating shaft with a screw for claw opening / closing operation, and 5 is a diameter A rotating shaft for telescopic operation 6 is an elastic shield material. First of all, the shield material holding and 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 in an open state.
[0015]
Next, the shield material is placed on the shield material cradle 27 in FIG. 2, with the holding receiver opening the holding claws from four directions (6 to 8 directions are better for large-diameter pipes). Approach and hold the shield material. 3 and 4 show the opening / 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 against the force to open between both claws depends on the material strength of the holder and the rotating shaft portion. As a result, it became possible to give a greater strength than a presser such as a spring.
[0016]
At this time, as shown in FIG. 3, the shape of the claw is substantially the same as the cross-sectional shape of the shield material, and when the shield material is attached to the corrugated tube, the corrugated tube outer peripheral portion as shown at 52 in FIG. It can be made to substantially coincide with the shape.
[0017]
Next, the holding receiving device widens outward and stops when it becomes larger than the outer diameter of the corrugated tube, and the corrugated tube moves in the ring from the lateral direction and stops at a predetermined position. At this time, a stopper or the like is provided at a predetermined position, and when the corrugated tube comes into contact with the stopper, the sensor works to stop the movement of the corrugated tube, and at the same time, the holding receiver approaches the outer diameter of the tube while reducing the diameter of the shield material. When approaching the nearest point, this is opened and the shield material is attached to the pipe valley.
[0018]
The holding receiving device returns to the initial state and stops as it is, and the corrugated tube is unloaded from the device at the same time as the shield material is released.
[0019]
【The invention's effect】
As described above in detail with reference to one embodiment, according to the present invention, since the shield material is held from the outer peripheral portion, the shield material is not rubbed or rotated at the time of installation, and is kept in a predetermined position. The shield material can be attached, and the shape of the nail of the holding and receiving device is generally matched to the shape of the shield material, so even if there are rib-like projections, the shield material has good adhesion without damaging the external shape. Attached. In addition, since the cross-sectional shape of the shield material can be designed freely, it is possible to use a shield material with better adhesion. For this reason, sufficient adhesion can be obtained to flow a liquid such as water.
[0020]
Also, as shown in 53 and 54 in FIG. 5, a shield material with rib-like projections on the upper bottom and side portions can be used, so that adhesion is improved even when the dimensional accuracy of the corrugated tube and connecting parts is poor. Can be planned. For this reason, it has become possible to use a ring-shaped shield material for a pipe that requires a force of about 500 N or more that can be performed by a person for widening the shield material, such as a large-diameter pipe.
[0021]
In addition, since it was possible to attach a shield material using a strong elastic body, the conventional method had some water leakage due to insufficient tightening, but it was possible to withstand internal pressure water.
[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 same shield material cradle. .
FIG. 3 is a side view showing a shape of a nail of a shield material holder and a state in which the shield material is held.
FIG. 4 is a side view showing a state in which the shield material is opened.
FIG. 5 is a cross-sectional view showing the shape of a shield material.
FIG. 6 is a mounting diagram according to a conventional method.
[Explanation of symbols]
1 corrugated tube body,
2 Holding and receiving device claw 3 Holding and receiving device claw,
4 Holding receiving device opening and closing rotary shaft,
5 Ring-shaped shield material widening rotary shaft,
6 Ring-shaped shield material 27 Shield material cradle,
61 Jig for widening 62 Jig for widening

Claims (3)

In a device that attaches a ring-shaped shield material to the outer periphery of a corrugated tube,
The contact portion with the shield material has the same shape as the side surface of the shield material, or the same shape as the side surface and the inner surface, and at least contacts the side surface of the shield material and holds the shield material from the outer surface direction 4 A holding receptacle device having the above claws and a rotating shaft for opening / closing and moving each claw ,
By rotating the rotary shaft, after holding sandwiching the shielding member by said claw, and widened until greater than the outer diameter of the corrugated tube the shielding member is moved in a direction away pawls mutually An apparatus for attaching a shield material for a corrugated pipe, wherein the claws release the shield material and attach the corrugated pipe to the corrugated pipe after the corrugated pipe is moved to a predetermined position in the ring of the shield material.   The corrugated tube shield material mounting device according to claim 1, wherein the holding receiving device includes a rotation shaft for opening and closing the claw and another rotation shaft for moving each claw. The corrugated tube shield material mounting apparatus according to claim 1, wherein the shield material is an elastic body having rib-shaped protrusions on a side surface or an outer surface.

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