JP2011080335A - Bend prevention ring and coupling structure of ribbed pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make handling work easy such as mounting work or the like on the end of a ribbed pipe, and firmly fix and connect the ends of the ribbed pipes to each other without bending in association with a bend prevention ring mounted together with a water-shutoff rubber ring on the joint end of the ribbed pipe. <P>SOLUTION: The bend prevention ring is integrally formed so that a hard core material is disposed in the inner layer the surface of which is covered with the outer layer made of a soft material. The bend prevention ring is mounted together with the water-shutoff rubber ring on the periphery of the insertion mouth part of the ribbed pipe in such a manner that at least one rib is disposed between both the rings, and the water-shutoff rubber ring is disposed on the front end side of the insertion mouth part. The insertion mouth part of the ribbed pipe on one side is inserted into the receiving mouth part of the ribbed pipe on the other side so that the outer peripheral surfaces of the water-shutoff rubber ring and the bend prevention ring are pressed against the inner circumferential surface of the receiving mouth part thereby connecting the ends of both the pipes to each other. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  In the present invention, when connecting the ends of synthetic resin ribbed pipes with circumferential ribs projecting from the outer surface, the bend attached to the connection site to maintain the straightness of the pipes to be connected. Regarding prevention ring.

  In order to prevent the pipe from meandering when the ribbed pipes are buried in the ground to form the lower drainage pipe, and the ends of the ribbed pipes are connected in a bent state. It has been practiced to connect the ends of both pipes by attaching a bend prevention ring to the joint end of the ribbed pipe together with a water stop rubber ring.

  This is an end portion of the ribbed tube 100, as shown in FIG. 4, in which the anti-bending ring 102 formed in a substantially C shape by a synthetic resin material or metal material harder than the water stop rubber ring 101 is formed. Attached with the water stop rubber ring 101 between the ribs 100a and 100a of the outlet 100A, the outlet 100A is inserted into the receiving port 100B which is the end of the ribbed tube 100 of the connection partner, and is inserted into the receiving port 100B. The bending prevention ring 102 is inserted to a position where it is press-fitted, and the outer peripheral surface of the two ring-shaped members of the water-stopping rubber ring 101 and the bending prevention ring 102 is in pressure contact with the inner peripheral surface of the receiving opening 100B. The bent pipe 100, 100 is prevented from being bent in the 100B, and the connecting pipe line of the ribbed pipes 100, 100 is held straight (see, for example, Patent Documents 1 and 2).

JP 2001-208255 A JP 2008-280845 A

When connecting the ribbed pipes 100 and 100 by attaching the water stop rubber ring 101 and the bending prevention ring 102 to the joint end of the outlet 100A and the receiving opening 100B, the connecting pipe line is held straight. In order to achieve this, it is necessary to fix the water stop rubber ring 101 and the bending prevention ring 102 at the pressure contact positions of the inner and outer peripheral surfaces of the outlet 100A and the receiving port 100B without elastic deformation. It is necessary to provide the prevention ring 102 with higher rigidity than the water stop rubber ring 101.
However, the rib-shaped tube 100 is not formed by a material that is simply formed of a synthetic resin material or metal material that is harder than the water-stopping rubber ring 101, such as the conventional anti-bending ring 102. It is difficult to attach to the opening 100A, and if the bending prevention ring 102 is forcibly elastically deformed in the diameter-enlarging direction for attachment, it does not return to its original shape but is attached in the deformed state, and the opening 100A and the receiving opening are attached. 100B may be eccentrically connected. In addition, since the bending prevention ring 102 is provided in a size that presses between the inner and outer peripheral surfaces of the insertion port 100A and the receiving port 100B, care must be taken not to shift the tube axis when connecting the connecting port 100A to the receiving port 100B. However, the insertion port 100A fitted with the water stop rubber ring 101 and the anti-bending ring 102 has to be strongly pushed into the receiving port 100B, and the connection work is also troublesome.

  In view of such problems of the prior art, the present invention provides a bend prevention ring that is attached to a joint end of a ribbed tube together with a rubber ring for water stop, and handling such as mounting to the end of the ribbed tube is not possible. It is simple, and it is an object to be able to firmly fix and connect without bending the ends of the ribbed tube.

  The present invention for solving the above-mentioned problems is a bend prevention ring mounted together with a water-stopping rubber ring on the outer periphery of a ribbed tube, and a hard core member is disposed on an inner layer portion, and the surface thereof is a soft material. It is characterized by being formed by covering and integrating with an outer layer portion made of

  In the above configuration, the bend prevention ring has an outer periphery in order to easily insert the rib end of the ribbed pipe fitted with the water stop rubber ring and the ribbed pipe on the connection partner side. A tapered surface portion is preferably provided between the surface portion and the side surface portion.

  In addition, the outer diameter of the anti-bending ring is ribs so that the anti-bending ring is firmly joined to the inner and outer peripheral surfaces of both ends with the insertion port inserted into the receiving port and fixed so as not to swing. It is preferable that it is larger than the inner diameter of the receiving port of the attachment tube and smaller than the outer diameter of the water stop rubber ring.

  In addition, the structure for connecting the ends of the ribbed tube using the anti-bending ring having the above-described configuration and having one side as a slot and the other side as a receiving port having a diameter larger than that of the slot is the difference between the ribbed tubes. The water stop rubber ring and the bending prevention ring are arranged on the outer periphery of the mouth so that one or more ribs are arranged between both members, and the water stop rubber ring is on the front end side of the opening. And insert the outlet of the ribbed tube into the receiving port of the ribbed tube of the connection partner, and press the outer peripheral surface of the water stop rubber ring and the anti-bending ring against the inner peripheral surface of the receiving port. It is characterized by connecting the ends of each other.

  According to this, if a rubber ring for water stop and an anti-bending ring are attached to the outer periphery of the ribbed tube, and inserted into the receiving port of the ribbed tube of the other party, the inner and outer peripheral surfaces of both ports The rubber ring for water stop and the anti-bending ring are in contact with each other in a compressed state, and there is no gap that causes the pipe to bend between the two ports, and is arranged with one or more ribs between them. Both ports are supported by the water-stopping rubber ring and the anti-bending ring that are press-contacted in a ring shape along the inner and outer peripheral surfaces, and the pipe can be prevented from bending. In this case, the bending prevention ring is formed by setting the outer diameter to be larger than the inner diameter of the receiving port of the ribbed tube and smaller than the outer diameter of the water-stopping rubber ring. In the inserted state, it exerts a reaction force equal to or greater than the reaction force when inserting the slot into the socket, and presses against both ports, and the slot is fixed in the center of the socket without bending in the socket. It will be.

  The anti-bending ring is formed by covering the inner layer portion made of a hard core member with the outer layer portion made of a soft material, so that it can be easily attached to the outer periphery of the outlet by elastically deforming it. If this is pushed into the receiving port while being attached to the mouth, the outer layer portion is elastically deformed by the pressing force from the inner peripheral surface of the receiving port, and the gap can be easily inserted to a predetermined position in the receiving port. For the anti-bending ring, the hard core member that is the inner layer is made of a material harder than the water-stopping rubber ring, such as synthetic rubber, or synthetic resin such as vinyl chloride or polypropylene, and the outer layer is made of the water-stopping rubber ring. Also, it can be formed using a soft material, for example, a synthetic resin material such as synthetic rubber or polypropylene.

It is the external view which fractured | ruptured and showed the lower half surface of the receiving port of the pipe with a rib which attached the bending prevention ring of one Embodiment of this invention to the opening, and the pipe with a connection other party. 1A is a front view, FIG. 1B is a longitudinal sectional view taken along the line BB, and FIG. 1C is a cut end view taken along the line CC. FIG. 2 is a cross-sectional view of a joining end portion of a ribbed tube connected by attaching the bending prevention ring of FIG. 1. (A) is the external appearance perspective view of the conventional bending prevention ring, (B) is sectional drawing of the junction end part of the pipe with a rib which attached and connected the conventional bending prevention ring.

A preferred embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the ribbed tubes 1, 1 have a circular tube with an appropriate length, and a large number of ribs 11 projecting along the circumferential direction on the outer surface of the ribbed tubes 1, 1 have a predetermined interval over the entire length in the tube axis direction. A large-diameter receiving port 1B opened to a size that allows the insertion of the insertion port 1A at one end and the insertion of the insertion port 1A at the other end is provided.

  The water stop rubber ring 2 is a rubber ring mounted between the ribs 11 on the outer surface of the opening 1A, and is compressed on the inner and outer peripheral surfaces of both ends with the opening 1A inserted into the receiving port 1B. Thus, the gap between both surfaces is sealed.

As shown in FIG. 2, the bending prevention ring 3 has a C shape with a part of the circumferential direction missing, and the inner layer portion 31 is formed of a hard core member harder than the water stop rubber ring 2. The surface of the portion 31 is formed by covering and integrating with an outer layer portion 32 made of a soft synthetic resin material that is softer than the water stop rubber ring 2.
More specifically, the anti-bending ring 3 is formed by, for example, using a vinyl chloride resin material as a core material and press-molding the surface thereof with synthetic rubber. The outer diameter (OD3) of the ring-shaped ring receiving port A trapezoidal shape having a width larger than the inner diameter (ID) and smaller than the outer diameter (OD2) of the water stop rubber ring (see FIG. 1) and having a width capable of being fitted between the ribs 11 and 11. And a tapered surface portion 3c is provided between the outer peripheral surface portion 3a and the side surface 3b portion.

  In order to connect the ends of the ribbed tubes 1, 1 using such a bend prevention ring 3, first, a water stop rubber ring 2 and a bend prevention ring 3 are provided on the outer periphery of the opening 1 </ b> A of the ribbed tube 1. Are arranged so that one or more ribs 11 are disposed between the two members, and the water stop rubber ring 2 is disposed so as to be on the front end side of the opening 1A. At this time, the bending prevention ring 3 has an inner layer portion 31 that is harder and higher in rigidity than the water-stopping rubber ring 2, but the outer layer portion 32 is formed of a softer material than the water-stopping rubber ring 2. It can be easily mounted on the outer periphery of the differential port 1A by elastically deforming in the diameter expansion direction.

  Next, the above-mentioned differential port 1A in which the anti-bending ring 3 is mounted together with the water-stopping rubber ring 2 is pressed against the receiving port 1B of the ribbed tube 1 of the connection partner, and the anti-bending ring 3 is pressed against the inner peripheral surface of the receiving port 1B. Insert to position. At this time, if the insertion port 1A is pushed into the receiving port 1B, the outer periphery of the water-stopping rubber ring 2 and then the surface of the tapered surface portion 3c of the anti-bending ring 3 are in contact with the inner peripheral surface of the receiving port 1B. Is inserted while being compressed in response to a pressing force in the diameter reducing direction, and the outer peripheral surface of the water-stopping rubber ring 2 and the outer peripheral surface portion 3a of the anti-bending ring 3 are pressed against the inner peripheral surface of the receiving port 1B. Seal without gaps.

  If the differential port 1A is inserted into the receiving port 1B in this way, the water-stopping rubber ring 2 and the bend preventing ring 3 are in contact with the inner and outer peripheral surfaces of both ports in a compressed state, and the conduit is bent between the two ports. The two openings are supported by two members of the water stop rubber ring 2 and the bending prevention ring 3 that are pressed in a ring shape along the inner and outer peripheral surfaces of the differential opening 1A and the receiving opening 1B, and the pipe is bent. This can be effectively prevented.

  In addition, the form of the pipe 1 with a rib, the rubber ring 2 for water stop, and the bending prevention ring 3 shown in figure is an example, and this invention is not limited to the illustrated form, It can comprise in another appropriate form.

1 Ribbed tube, 11 rib, 1A outlet, 1B receiving port, 2 water stop rubber ring, 3 bending prevention ring, 31 inner layer portion, 32 outer layer portion, 3a outer peripheral surface portion, 32 side surface portion, 33 tapered surface portion

Claims (4)

  An anti-bending ring that is attached to the outer periphery of a ribbed tube with a water stop rubber ring. A hard core member is arranged on the inner layer, and the surface is covered with an outer layer made of a soft material. An anti-bending ring characterized by being molded.   The bend prevention ring according to claim 1, wherein a taper surface portion is provided between an outer peripheral surface portion and a side surface portion of the bend prevention ring.   The bend according to claim 1 or 2, wherein an outer diameter of the bend prevention ring is larger than an inner diameter of a receiving port of a ribbed tube and smaller than an outer diameter of a water stop rubber ring. Prevention ring. The structure which connects the edge parts of the pipe | tube with a rib which used the bending prevention ring in any one of Claims 1-3 as one side, and made the other side a larger diameter receptacle than the said opening. In
The water stop rubber ring and the bend prevention ring are separated on the outer periphery of the rib-shaped tube outlet so that one or more ribs are arranged between the two members, and the water stop rubber ring Arrange it so that
Insert the ribbed tube outlet into the receiving tube's ribbed tube, and press the outer circumferential surface of the water stop rubber ring and the anti-bending ring against the inner circumferential surface of the port. Connecting structure of a tube with ribs to connect.

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