JP3115847U - Resin pipe joint - Google Patents

Abstract

The present invention provides a resin pipe connection joint in which a retaining member and a resin pipe do not co-rotate with the push ring when a push ring is screwed into a joint body and tightened.
A joint body 1, a tubular retaining member capable of reducing the diameter, and a push ring 5 are provided. A ring-shaped sealing material 17 that is in close contact with the resin pipe 100 inserted into the joint body 1 is held by the joint body 1. A retaining member is integrally connected to the joint body 1. The retaining member is formed by arranging retaining pieces made up of a neck portion and a wide portion protruding from the end portion of the joint body 1 in an annular shape at equal angles.
[Selection] Figure 1

Description

  In the present invention, a cylindrical retaining member externally fitted to a resin pipe is tightened by the push ring by screwing a push ring to a resin pipe connecting joint, in particular, a joint body into which the resin pipe is inserted. The present invention relates to a resin pipe connection joint that is designed to prevent a resin pipe from being removed.

  For resin pipe connection joints for connecting resin pipes such as vinyl chloride resin pipes (vinyl chloride pipes), the retaining member is reduced in diameter by screwing the male thread of the press ring into the female thread of the joint body. It has been proposed to tighten the resin pipe and prevent the resin pipe from being pulled out by doing so (for example, see Patent Document 1). FIG. 5 is a diagram showing the connection structure shown in Patent Document 1 as it is. As can be seen from the figure, in this case, the retaining member and the joint main body constitute separate parts, and when the press ring is screwed into the joint main body and tightened, the tapered inner surface of the press ring is the retaining member. The taper-shaped outer surface is pressed radially inward to reduce the diameter of the retaining member.

JP 2003-130274 A

  However, in the structure described with reference to FIG. 5, the initial stage in which the inner surface of the press ring screwed into the joint body only overlaps the outer surface of the retaining member, in other words, the retaining member does not strongly tighten the resin tube. At this stage, it can be said that the retaining member tends to follow the rotation of the press ring screwed into the joint body, and in some cases, the retaining member is reduced in diameter to strengthen the resin tube. When the press ring is further screwed in after tightening, the retaining member may rotate together with the press wheel, or the resin tube tightened by the retaining member may rotate together with the press ring or the retaining member.

  When the retaining member rotates together with the press ring, the retaining member may be scratched or scratched on the outer surface of the resin tube inserted into the joint body to reduce the strength of the resin tube connecting portion. . Also, under the working condition that the resin tube rotates together with the press ring and the retaining member, the workability when the press ring is screwed into the joint body and tightened is hindered by the co-rotation of the resin tube, and the workability is significantly reduced.

  The present invention has been made in view of the above situation, and when the press ring is screwed into the joint body and tightened, measures must be taken to reliably prevent the retaining member and the resin tube from rotating together with the press ring. The purpose is to provide a resin pipe connection joint that prevents any deterioration in strength due to damage to the resin pipe at the connection location, and improves the connection workability so that anyone can easily perform the connection work. And

  It is another object of the present invention to provide a resin pipe connection joint in which the screwing strength of a press ring for obtaining a resin pipe retaining action by a retaining member does not affect the watertight sealing performance of the resin pipe connecting portion. And

  Furthermore, an object of the present invention is to provide a resin pipe connection joint that can easily reduce the cost by suppressing the number of necessary parts as much as possible.

  A resin pipe connection joint according to the present invention includes a cylindrical joint body into which a resin pipe is inserted, a cylindrical retaining member capable of reducing the diameter and fitted into a resin pipe inserted into the joint body, A push ring provided with a tightening means for pressing the pressing portion provided on the retaining member by being screwed to the joint body and reducing the diameter of the retaining member against the outer surface of the resin pipe inserted into the joint body; ,have. And the ring-shaped sealing material closely_contact | adhered to the resin pipe inserted in the joint main body is hold | maintained at the joint main body, and the said retaining member is integrally connected with the said joint main body.

  With this configuration, since the retaining member is integrally connected to the joint main body, there is no room for occurrence of a situation in which the retaining member and the resin pipe rotate together with the push ring. For this reason, the strength of the resin tube is not reduced due to the retaining member rubbing against the resin tube and damaging the resin tube, and the workability associated with the rotation of the resin tube does not occur. In addition, since the connection work only needs to be performed by screwing the press ring into the joint body into which the resin pipe is inserted and tightening, anyone can easily perform the connection work. In addition, since the retaining member is integrally connected to the joint body, the number of parts can be reduced and the price can be reduced compared to the case where the retaining member is a separate part. By being held, the screwing strength of the push ring to obtain the resin pipe retaining action by the retaining member does not affect the water-tight sealability of the resin pipe connection point, which includes excessive tightening of the press ring, etc. It helps to prevent water leaks due to water.

  In the present invention, the tightening means provided in the press ring is an action part that presses the pressure receiving part provided in the retaining member, and at least one side portion of the action part and the pressure receiving part is the press ring. It is possible to adopt a configuration of a tapered inclined surface that gradually expands in the screwing direction. According to this, when the pusher wheel is moved in the screwing direction by being screwed into the joint body, the action part of the pusher wheel presses the pressure receiving part of the retaining member to reduce the diameter of the retaining member. And since the taper-shaped inclined surface was employ | adopted as the at least one side site | part of an action part and a pressure receiving part, there exists an advantage that it becomes possible to comprise a fastening means, without using another components.

  In the present invention, it is desirable that the pressing portion of the retaining member includes a claw that can be bitten into the resin tube. According to this, the retaining member is reduced in diameter so that the claw of the pressing portion is attached to the resin tube. By making it bite, the stability of the resin tube retaining action is improved.

  In the present invention, the retaining member integrally connected to the joint body is made of metal formed by cutting, and the retaining member includes a neck portion protruding from an end portion of the joint body and the neck portion. Are arranged in an annular shape at equal angle intervals, and the neck portion of the retaining piece is formed narrow so that the neck portion is formed with a narrow width. It is desirable to adopt a configuration in which elastic deformation is possible. According to this, even if the retaining member is formed by cutting a metal material such as a gun metal, the narrow necks provided on the plurality of retaining pieces of the retaining member are elastically deformed. Therefore, the resin tube is prevented from being removed by the retaining member that has been naturally reduced in diameter by the action of the push ring.

  As described above, according to the present invention, when the press ring is screwed into the joint body and tightened, the retaining member and the resin tube do not rotate together with the press ring and damage the resin tube or decrease workability. Therefore, the strength reduction accompanying the damage of the resin pipe at the connecting portion is prevented, and at the same time, the connecting workability is improved and anyone can easily perform the connecting work. In addition, since the screw ring strength to obtain the resin pipe retaining effect does not affect the watertight sealability of the resin pipe connection location, there is room for leakage due to overtightening of the press ring. Eliminates watertight reliability at the connection point. Furthermore, since the retaining member is integrally connected to the joint body, the number of necessary parts can be reduced as much as possible, and a resin pipe connection joint having the above performance can be provided to the user at a low cost. The effect of becoming.

  FIG. 1 is a partial cross-sectional view showing a use state of a resin pipe connection joint according to an embodiment of the present invention, and FIG. 2 is an enlarged view of a portion II in FIG. FIG. 3 is a schematic perspective view of the joint body 1.

  As shown in FIG. 1, the joint body 1 of the illustrated example is manufactured in a cylindrical shape by cutting a gun metal, and includes cylindrical connection port portions 13 and 14 on both sides of the tool mounting portion 12. Resin pipes connected to each other via the resin pipe connection joints are inserted into the connection ports 13 and 14 respectively. The connection port 13 on one side is provided with a male screw 15 and a tubular retaining member 2 protruding from the end surface of the connection port 13. In addition, an annular groove 16 that holds a ring-shaped sealing material 17 made of a rubber O-ring is formed on the inner peripheral side of the connection port portion 13 over two strips.

  As shown in FIG. 3, the retaining member 2 integrally connected to the joint body 1 is formed by arranging a plurality of retaining pieces 3 having the same shape in an annular shape at equal angles. The piece 3 has a neck portion 31 protruding from the end portion of the joint body 1 and a wide portion 32 connected to the neck portion 31. The entire wide portion 32 is formed as a pressing portion 34 including a pointed claw 33 formed by a ridgeline. On the other hand, the neck portion 31 is formed to be narrow so that the neck portion 31 can be elastically deformed.

  On the other hand, as shown in FIG. 1, the pusher wheel 5 is formed by a nut body having a female screw 51 and a resin pipe insertion opening 52, and the retaining member 2 is reduced by reducing the diameter of the retaining member 2. There are provided tightening means for pressing the pressing portions 34 of the individual retaining pieces 3 forming the outer surface of the resin pipe. The tightening means includes an action portion 53 for pressing the pressure receiving portion 35 formed by the outer surface of each retaining piece 3 forming the retaining member 2. In this embodiment, the action portion 53 is formed by a tapered inclined surface that gradually expands in the screwing direction A of the pusher wheel 5, whereas the pressure receiving portion 35 on the retaining member 2 side also has It is formed by a tapered inclined surface inclined with the same or substantially the same gradient as the inclined surface forming the action part 53.

  Next, the operation of the resin pipe connection joint configured as described above will be described.

  As shown in FIG. 1, when a resin pipe 100 such as a PVC pipe is inserted into the joint body 1, the sealing material 17 held on the joint body 1 side is brought into close contact with the outer peripheral surface of the resin pipe 100 and the portion is sealed watertight. To do. Here, the sealing material 17 is held in the annular groove 16 provided in the connection port portion 13 of the joint body 1, and is expanded by the resin tube 100 inserted into the connection port portion 13, and the outer periphery of the resin tube 100. Since it is in close contact with the surface, the watertight performance of the sealing material 17 has no relationship with the screwing operation of the press wheel 5. Therefore, even if there is an excess or deficiency in the screwing amount of the push wheel 5, this does not impair the watertight performance of the sealing material 17 and cause water leakage.

  The press ring 5 is inserted in the resin tube 100 in advance, and after the resin tube 100 is inserted into the connection port 13 of the joint body 1, the female screw 51 of the press ring 5 is screwed into the male screw 15 of the connection port 13. When screwing the press wheel 5 into the connection port 13, the operator can turn the press wheel 5 by hand and screw it in the initial stage. When the pusher wheel 5 is screwed into the connection port 13 in this way, after the action part 53 of the pusher wheel 5 overlaps the pressure receiving part 35 of each retaining piece 3 forming the retaining member 2, the pusher wheel 5 is further screwed. By moving in the direction A, the action portion 53 pushes the pressure receiving portion 35 in the radially inward direction, and the retaining piece 3 is bent and deformed inward with the neck portion 31 as a fulcrum. As a result, the pressing portion 34 of the retaining piece 3 presses the outer surface of the resin tube 100 to retain the resin tube 100. In this case, as shown in FIG. 2, the claw 33 provided in the pressing portion 34 bites into the tube wall of the resin tube 100, so that the retaining action on the resin tube 100 is more remarkably exhibited.

  In this embodiment, since the retaining member 2 formed by the plurality of retaining pieces 3 is integrally connected to the joint body 1, the retaining member 2 and the resin tube are used when the presser wheel 5 is screwed. A situation in which 100 rotates together with the wheel 5 cannot occur. Therefore, during the connection work, the resin tube 100 is not damaged due to the co-rotation of the retaining member 2 and the workability is not lowered due to the co-rotation of the resin tube 100.

  FIG. 4 is a front view showing a joint body 1 having a retaining member 2 according to a modification. In the joint main body 1 of this example, the retaining member 2 is formed by forming slit-like cutout portions at a plurality of portions of the tapered cylindrical portion protruding from the end of the connection port portion of the joint main body 1. The plurality of retaining pieces 3 are formed. Each retaining piece 3 is provided with a pressing portion 34 including a claw 33. Even if the joint main body 1 is replaced with the joint main body 1 shown in FIG. 1, a situation in which the retaining member 2 and the resin tube 100 rotate together with the pusher wheel 5 when the pusher wheel 5 is screwed in cannot occur. Therefore, during the connection work, the resin tube 100 is not damaged due to the co-rotation of the retaining member 2 and the workability is not lowered due to the co-rotation of the resin tube 100.

It is the fragmentary sectional view which showed the use condition of the resin pipe connection coupling which concerns on embodiment of this invention. It is the II section enlarged view of FIG. It is a schematic perspective view of a coupling main body. It is a front view of the joint main body provided with the retaining member by a modification. It is the figure which published the connection structure shown by patent document 1 as it is.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Joint main body 2 Detachment member 3 Detachment piece 5 Push ring 17 Ring-shaped sealing material 31 Neck part 32 Wide part 33 Claw 34 Press part 35 Pressure receiving part 53 Action part 100 Resin pipe

Claims (4)

A cylindrical joint body into which the resin pipe is inserted, a cylindrical retaining member capable of reducing the diameter that is externally fitted to the resin pipe inserted into the joint body, and the retaining body that is screwed to the joint body A press ring provided with tightening means for pressing the pressing portion provided on the retaining member by reducing the diameter of the member against the outer surface of the resin pipe inserted into the joint body,
A ring-shaped sealing material that is in close contact with the resin pipe inserted into the joint body is held by the joint body, and the retaining member is integrally connected to the joint body. Fittings. The tightening means provided in the press wheel is an action part that presses the pressure receiving part provided in the retaining member, and at least one side portion of the action part and the pressure receiving part is in the screwing direction of the press wheel. The resin pipe connection joint according to claim 1, comprising a tapered inclined surface that gradually expands toward the surface. The resin pipe connection joint according to claim 1 or 2, wherein the pressing portion of the retaining member includes a claw that can be bitten into the resin pipe. The retaining member integrally connected to the joint body is made of metal formed by cutting, and the retaining member is connected to the neck protruding from the end of the joint body and the neck. The retaining pieces made of the wide portion having the pressing portion are arranged in an annular shape at equal angles, and the neck portion of the retaining piece is formed narrow so that the neck portion can be elastically deformed. The resin pipe connection joint according to any one of claims 1 to 3.

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