JPH05138744A - Pipe joint and production thereof - Google Patents

Abstract

PURPOSE:To sufficiently develop waterproof function and connection function by providing a fin like seal piece to the opening end edge of the metal insertion and fitting cylindrical part provided to a joint main body in a protruding state so as to outwardly protrude from the opening end edge in a rearwardly inclined state, CONSTITUTION:A joint main body 1 is formed by molding a stainless steel plate material into a cylindrical shape and successively cutting the formed cylindrical body into a short cylindrical body. A calyx like part 5 outwardly protruding by collapsing press processing is formed to the middle part of the joint main body 1 and the joint main body 1 is divided into an insertion and fitting cylindrical part 2 on a water-surface side and an insertion and fitting cylindrical part 2' on a submerged side by the calyx like part 5. Both cylindrical parts 2, 2' have the same shape and the opening end edges 3,3 of both of them are formed into a tapered shape so as to be inclined inwardly and a seal piece 4 is provided to the opening end edge 3 only of the insertion and fitting cylindrical part 2 on the water-surface side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint for connecting pipes such as a downpipe and a drainage pipe, and a method for manufacturing the pipe joint.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 12, a sealing material (c) is provided on the outer circumference of a metal insertion fitting tubular part (b) which is provided so as to project from a joint body (a). Pipe joints are known. The pipe joint is used as a downspout joint, and is a joint main body (a) that serves as a fitting receiving cylinder portion (d) on the water side.
The insertion fitting cylinder part (b) is protruded below and is integrally formed of metal, and the lower end opening of the water-side down trough is inserted and fitted into the fitting receiving cylinder part (d) and inserted. The fitting tubular portion (b) is inserted and fitted into the upper end opening of the underwater gutter to fit and connect the ends of the gutter.

Further, in this case, as shown in FIG. 13, the seal material (c) is made of a soft material and formed in a ring shape in advance, and is formed on the outer periphery of the insertion fitting tubular portion (b). Depending on the method of fitting into the groove (e) or as shown in FIG. 14, by injecting and filling into the groove (e) formed on the outer periphery of the insertion fitting cylinder (b) and then hardening. Has been formed.

[0004]

However, in the above-mentioned prior art, the outer periphery of the seal material (C) is inserted when the insertion fitting cylinder (B) is inserted and fitted into the upper end opening of the vertical gutter. The part is caught on the opening edge of the vertical gutter, and when inserted,
It was difficult for the outer peripheral surface of the lumber (c) to slide strongly against the inner peripheral surface of the vertical gutter and to be inserted.

Further, in the pipe joint obtained by the manufacturing method shown in FIG. 13, since the seal material (c) is formed by fitting the pipe joint formed in advance as a separate body, The lumber (c) was easily detached from the outer circumference of the insertion fitting tubular part (b).

Further, in the manufacturing method shown in FIG. 14, since the seal material (c) in a softened state is adhered and formed, the seal material (c) is formed into an accurate shape. It was difficult and difficult to manufacture.

The present invention has been invented in order to solve the above-mentioned problems in the prior art, that is, the problem is that the seal piece does not hinder the insertion of the insertion fitting tubular portion, Moreover, the present invention provides a pipe joint in which the seal piece sufficiently exhibits a waterproof function and a connection function, and a method for manufacturing a pipe joint in which the seal piece in the pipe joint is formed easily and surely. That is.

[0008]

According to a first aspect of the present invention, there is provided a pipe joint in which an insertion-fitting tubular portion made of metal protruding from a joint body has an opening end edge projecting outward so that the edge side. It is possible to provide the pipe joint which is the above-mentioned subject by additionally providing a fin-shaped seal piece inclined from the rear to the rear.

According to a second aspect of the present invention, in a method for manufacturing a pipe joint, a seal material before hardening is injected and filled into a groove provided on a base, and the groove is projected from the joint body. After inserting the opening end edge of the insertion fitting cylindrical portion made of metal, the seal material is cured to form a seal piece protruding outward at the opening end edge. According to a third aspect of the present invention, there is provided a method for manufacturing a pipe joint, wherein an opening end of an insertion fitting tubular portion made of metal protruding from a joint main body is provided in a recess provided on a base. The edge is housed and arranged, and a seal material is injected and filled between the outer peripheral surface of the opening edge and the inner peripheral surface of the recess to be cured to form a seal piece on the outer peripheral surface of the opening edge. The present invention is characterized by being attached, and any one of the configurations can provide a method for manufacturing the pipe joint which is the above-mentioned problem.

[0010]

In the pipe joint according to claim 1) of the present invention,
Since a fin-shaped seal piece protruding outward and inclined rearward from the edge side is attached to the opening end edge of the insertion fitting tubular portion made of metal protruding from the joint main body, When the insert fitting tube portion is inserted, the ruling piece tilts backward and does not cause any trouble, and the insert fitting tube portion can be smoothly inserted and fitted. Moreover, the seal piece tilted rearward acts as a strong resistance in the direction in which the insertion-fitting cylinder part comes off, so that the seal piece sufficiently exhibits the waterproof function and the connection function. Is.

Further, in the method for manufacturing a pipe joint according to claims 2) and 3) of the present invention, a seal material is injected and filled into a recessed groove or a recess provided on a base, and the recessed groove is formed. Alternatively, since it is integrated with the opening end edge of the insertion fitting tubular portion arranged in the recess, the seal member allows a seal piece having an accurate shape to be easily attached to the opening end edge of the insertion fitting tubular portion. It is formed and attached.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The pipe joint shown in FIGS. 1, 2 and 3 is an embodiment of the pipe joint according to claim 1) of the present invention, and is an insertion fitting tube made of metal protruding from the joint body 1. In the opening edge 3 of the part 2,
A fin-shaped seal piece 4 protruding outward and inclined rearward from the edge side is provided.

The joint body 1 is formed by forming a stainless plate material into a cylindrical shape and sequentially cutting it into a short cylindrical body. In the middle of the joint body 1, a collar-shaped portion 5 protruding outward is formed by crushing press working, and by the collar-shaped portion 5, a water-side insertion fitting cylinder portion 2 and a water-sided side portion are formed. The insertion fitting tubular portion 2'is formed separately in the upper and lower parts. The water-side insertion fitting tube portion 2 and the water-side insertion fitting tube portion 2'have the same shape, and the opening end edges 3 and 3'are tapered so as to incline inward. The seal piece 4 is formed on the opening edge 3 of the insertion fitting cylinder portion 2 on the water side only.
Is attached.

The seal piece 4 is formed of a water-swellable seal material (trade name "Chemguard U", manufactured by Sanyo Kasei Kogyo Co., Ltd.), and the inclination of the above-mentioned water-side insertion fitting cylinder portion 2 It is attached to the opening edge 3 formed. The seal member 4 swells by absorbing rainwater and surely seals a gap between the seal member 4 and the inner surface of the vertical gutter 6.

Further, the pipe joint of the embodiment is used as a vertical gutter joint and connects the open end portions of the upper and lower vertical gutters 6 to each other. In this case, both the water insertion side and water side insertion fitting cylinders 2 and 2'are inserted and fitted into the opening end of the downpipe 6, and only the flange 5 is exposed to the outside.
They are fit and connected in a good appearance.

Therefore, in the pipe joint according to the embodiment, the opening fitting edge 3 of the insertion fitting tubular portion 2 made of metal protruding from the fitting body 1 projects outward and is inclined rearward from the end edge side. Since the fin-shaped seal piece 4 is additionally provided, the seal piece 4 tilts backward when the insertion fitting tubular portion 2 is inserted into the opening end portion of the vertical gutter 6, which causes a hindrance. Instead, the insertion fitting tubular portion 2 can be smoothly inserted and fitted into the opening end portion of the downpipe 6. Moreover, the seal piece 4 tilted rearward acts as a strong resistance in the direction in which the insertion fitting tubular portion 2 comes off, so that the seal piece 4 provides a waterproof function in the connection portion of the vertical gutter 6. And, the connection function is fully exerted.

Further, the pipe joint is manufactured by the method shown in FIGS. 4, 5, 6 and 7, and the pipe joint manufacturing method is the pipe according to claim 2) of the present invention. It is one example of a method for manufacturing a joint. As shown in FIGS. 4 and 5, first, the pipe joint is manufactured by injecting and filling a seal material 9 before hardening into an annular ring-shaped groove 8 provided on a base 7, and then As shown in FIG. 6 and FIG. 7, the opening end edge 3 of the insertion fitting tubular portion 2 made of metal protruding from the joint body 1 is inserted into the groove 9, and then the seal material 9 is inserted. It is characterized in that a seal piece 4 which is hardened and protrudes outward is formed and attached to the edge 3 of the opening.

In this case, the base 7 is made of metal, and the groove 8 is engraved on the upper surface thereof. The groove 8 is
It is formed so as to incline inward in the depth direction so as to correspond to the inwardly sloping opening edge 3 of the insertion fitting tubular portion 2, and therefore the seal material 9 is formed in the same groove. The outer wall surface in 8
10 is filled and filled so as to extend along the inner wall surface 11 more. As the seal material 9, a viscous water-swellable seal material (trade name "Chemguard U": manufactured by Sanyo Kasei Co., Ltd.) is used, which is cured in the groove 8. The seal piece 4 is released from the groove 8.

Further, in the concave groove 8 filled with the seal material 9,
When the opening end edge 3 that is inclined inward of the insertion fitting tubular portion 2 is inserted, the outer peripheral surface 12 of the opening end edge 3 pushes the seal material 9 outward, and then the outer peripheral surface 12 is brought into contact with the outer peripheral surface 12. The seal material 9 is strongly adhered to form the fin-shaped seal piece 4 well, and the seal material 9 is also formed on the inner peripheral side surface 13 of the opening edge 3. It will be attached a little while reliably.

Therefore, in the method of manufacturing the pipe joint of the embodiment, the seal fitting 9 is injected and filled into the concave groove 8 provided on the base 7 and is inserted into the concave groove 8. Since it is integrated into the opening end edge 3 of the tube portion 2 like dobbing coating, a seal piece 4 having an accurate shape is easily formed on the opening end edge 3 of the insertion fitting tube portion 2 by the seal material 9. Is formed and attached to.

The method for manufacturing the pipe joint shown in FIGS. 8 and 9 is the method for manufacturing the pipe joint according to claim 3) of the present invention, wherein the circular recess 14 provided on the base 7 is The opening end edge 3 of the insertion fitting cylindrical portion 2 made of metal protruding from the joint body 1 is housed and arranged, and the outer peripheral surface 12 and the recess 14 inclined inward of the opening end edge 3 are inclined in a curved shape. Seal material 9 between the inner surface 15 and
Is filled and cured, and the seal piece 4 is formed and attached to the outer peripheral surface 12 of the opening edge 3.

In this case, the joint body 1 is the same as that of the above-mentioned embodiment, and the seal piece 4 is adhered and formed only on the outer peripheral surface 12 of the opening end edge 3 of the insertion fitting tubular portion 2. ing.
The pipe joint obtained by the manufacturing method also functions as the pipe joint according to claim 1) of the present invention.

Therefore, also in the method for manufacturing the pipe joint of the embodiment, the seal material 9 is injected and filled into the recess 14 provided on the base 7, and the insert fitting is accommodated and arranged in the recess 14. Since it is integrated with the outer peripheral surface 12 of the opening end edge 3 of the coupling tube portion 2,
With the seal material 9, a seal piece 4 having an accurate shape can be easily formed and attached to the opening edge 3 of the insertion fitting tubular portion 2.

In the present invention, the pipe joint as in the embodiment shown in FIGS. 10 and 11 may be used. That is, the pipe joint of the embodiment is used as a rain gutter water collector, and has a vessel-shaped joint body 1 in which opening receiving portions 16 into which eaves gutters are inserted and connected are formed on both side walls. A rectangular tube-shaped insertion fitting tube portion 2 is integrally formed so as to hang downwardly below and is integrally formed of synthetic resin. Further, in this embodiment, the opening end edge 3 of the insertion fitting cylindrical portion 2 is arranged in the concave groove 8 provided on the base 7, and the opening end edge 3 of the insertion fitting cylindrical portion 2 of the same concave groove 8 is arranged. The seal material 9 is filled on the outside,
In this case, the seal piece 4 can be formed and attached by any one of the manufacturing method according to claim 2) or 3) of the present invention.

[0025]

As described above, in the pipe joint according to claim 1) of the present invention, an end projecting outward is formed at the opening edge of the insertion fitting tubular portion made of metal protruding from the joint body. Since a fin-shaped seal piece inclined rearward from the edge side is provided, the seal piece does not incline rearward when the insertion fitting tubular portion is inserted, which is a hindrance. She who leaned backwards
The ruled piece acts as a strong resistance in the direction in which the insertion fitting tube portion comes off, and sufficiently exhibits the waterproof function and the connection function.

Further, in the method of manufacturing a pipe joint according to claims 2) and 3) of the present invention, a seal material is injected and filled into a groove or a recess provided on the base. Alternatively, since it is integrated with the opening end edge of the insertion fitting tubular portion arranged in the recess, the seal member allows a seal piece having an accurate shape to be easily attached to the opening end edge of the insertion fitting tubular portion. It is formed and attached.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of a pipe joint according to claim 1) of the present invention.

FIG. 2 is a cross-sectional view of a main part of the pipe joint.

FIG. 3 is a cross-sectional view showing a usage state of the pipe joint.

FIG. 4 is a method of manufacturing the pipe joint according to claim 2) of the present invention.
It is a perspective view which shows 1 process of the manufacturing method of the described pipe joint.

FIG. 5 is a cross-sectional view of essential parts in the same step of the method for manufacturing the pipe joint.

FIG. 6 is a perspective view showing another step of the method for manufacturing the same pipe joint.

FIG. 7 is a main-portion cross-sectional view in the same step in the method for manufacturing the pipe joint.

FIG. 8 is a cross-sectional view showing a method for manufacturing a pipe joint according to claim 3) of the present invention.

FIG. 9 is a sectional view of an essential part of a pipe joint, which is an embodiment of the pipe joint according to claim 1) of the present invention, obtained by the manufacturing method.

FIG. 10 is a perspective view showing a pipe joint which is another embodiment of the pipe joint according to claim 1) of the present invention.

FIG. 11 is a main-portion cross-sectional view showing the manufacturing process of the pipe joint.

FIG. 12 is a perspective view showing a pipe joint which is a conventional example of the present invention.

FIG. 13 is a main-portion cross-sectional view showing the method for manufacturing the pipe joint of the conventional example.

FIG. 14 is a cross-sectional view of an essential part showing another manufacturing method of the pipe joint of the conventional example.

[Explanation of symbols]

 1 Joint body 2 Insert fitting cylinder part 3 Open edge 4 Seal piece

Claims (3)

[Claims] 1. A fin-shaped seal piece protruding outwardly and inclined rearward from the edge side is attached to an opening edge of an insertion fitting tubular portion made of metal protruding from a joint body. Become a pipe joint. 2. A pre-cured sheet in a groove provided on the base.
After pouring and filling a sealing material into the groove, and inserting the opening edge of the insertion fitting cylindrical portion made of metal protruding from the joint body, the sealing material is hardened and the opening edge is cured. A method of manufacturing a pipe joint, characterized in that a seal piece protruding outward is formed and attached to the outside. 3. An opening end edge of an insertion fitting tubular portion made of metal protruding from the joint body is housed and arranged in a recess provided on the base, and the outer peripheral surface of the opening end edge and the inside of the recess A method for manufacturing a pipe joint, comprising injecting and filling a seal material with the peripheral surface and curing the seal material to form a seal piece on the outer peripheral surface of the opening edge.