JP2002267084A - Header pipe material, connecting sleeve pipe for header pipe material, pipe end closing cap for header pipe material, connecting structure for header pipe material, and pipe end closing structure for header pipe material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a header pipe material having a small variety and capable of responding to various header part structures, a connecting sleeve pipe for the header pipe material used for the connection of the header pipe material, a pipe end closing cap for the header pipe material, a connecting structure for the header pipe material, and a pipe end closing structure for the header pipe material. SOLUTION: This header material is formed of a cross-link polyethylene and provided with a main pipe part comprising a header and a branch part branching from a side wall surface of the main pipe part. The header pipe materials formed with a spigot and a socket in one end and the other end of the main pipe part respectively are welded by the rolling friction via the sleeve pipe formed out of non-cross-link polyethylene.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a pipe for a header,
The present invention relates to a sleeve tube for connecting a header tube, a cap for closing a tube end of a header tube, a connection structure for a header tube, and a tube end sealing structure for a header tube.

[0002]

2. Description of the Related Art In a water supply or hot water supply piping system of each household, etc., water supply or hot water supply is performed in a kitchen, a washroom, a toilet,
In order to supply or supply water to a plurality of places such as a bathroom, a header having a header main section and a plurality of branch pipe sections provided to protrude from the header main section in a direction in which the branch is desired to be used. . Heretofore, as disclosed in Japanese Patent Application Laid-Open No. 2-253084, a header tube has been used in which a header main tube portion and a branch tube portion of the header are integrally formed in advance.

However, in the water supply or hot water supply piping system, the number or branch direction of branch pipes branching from the header main pipe is required variously depending on the scale of the house. Therefore, it is not possible to form all headers with such header tubes.

[0004] That is, if a variety of header tubes are prepared to meet various requirements, manufacturing facilities such as injection molding dies for each product are required.
Huge capital investment is required. Also, there is a problem of storage space.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been made in consideration of the above circumstances. It is an object of the present invention to provide a sleeve tube, a cap for closing the pipe end of the header pipe, a connection structure for the header pipe, and a pipe end sealing structure for the header pipe.

[0006]

In order to achieve such an object, a header tube according to the first aspect of the present invention (hereinafter referred to as "the header tube of the first aspect") is provided. A main pipe part formed of a synthetic resin and constituting a header; and a branch pipe part branched from a side wall surface of the main pipe part, a spout is formed at one end of the main pipe part, and a receiving port is formed at the other end. The mouth was formed.

[0007] The header tube according to the second aspect of the present invention (hereinafter referred to as "the header tube of the second aspect") is the header tube of the first aspect, wherein the socket is connected to the socket. It was formed to fit.

The header tube according to the third aspect of the present invention (hereinafter referred to as “the header tube of the third aspect”) is the same as the header tube of the first or second aspect, except that Was gradually increased in diameter at least two steps toward the other end.

According to the fourth aspect of the present invention, a sleeve pipe for connecting a header pipe material (hereinafter, referred to as a "sleeve pipe of the fourth aspect") according to the fourth aspect of the present invention is provided from one end to the first to third aspects.
Of the header tube material according to any one of the above, is formed so as to be able to fit into the socket of the header tube material from the other end from the other end, at least a spigot fitting portion that is fitted externally to the spigot A structure in which the inner peripheral surface and the inner peripheral surface of the receptacle fitting portion to be fitted in the receptacle are formed of a synthetic resin material that can be fused to the outer peripheral surface of the spout of the header tube and the inner peripheral surface of the receptacle. And

The connecting sleeve tube (hereinafter, referred to as the "sleeve tube of claim 5") for connecting the header tube material according to the invention of claim 5 of the present invention is the sleeve tube of claim 4 in the peripheral surface thereof. And a gear portion that meshes with a gear that transmits the driving force from the rotary drive device.

[0011] A cap for closing a pipe end of a header pipe material according to the invention of claim 6 of the present invention (hereinafter referred to as “claim 6
) Is formed at one end with a protrusion that can be fitted into the socket of the header tubing according to any one of claims 1 to 3, and at the other end is a spout of the header tubing. A recess that can be fitted is provided, and at least the outer peripheral surface of the convex portion and the inner peripheral surface of the concave portion are formed of a synthetic resin material that can be fused to the outer peripheral surface of the spout of the header tube and the inner peripheral surface of the receptacle. The configuration was adopted.

A cap for closing a pipe end of a pipe for a header according to the invention of claim 7 of the present invention (hereinafter referred to as “claim 7
In the cap of claim 6, a gear portion meshing with a gear transmitting the driving force from the rotary driving device is provided on the peripheral surface thereof.

[0013] The connection structure of the header tube material according to the invention described in claim 8 of the present invention (hereinafter referred to as "connection structure of claim 8") is according to any one of claims 1 to 3. The inner peripheral surface of at least the spigot fitting portion of the sleeve tube according to claim 4 or 5, wherein at least the inner peripheral surface of the socket and the outer peripheral surface of the spigot of the header tube are formed of crosslinked polyethylene. The outer peripheral surface of the mouth fitting portion is formed of non-crosslinked polyethylene, and one of the sleeve tubes is
The spigot of the header tube is inserted into the spigot insertion portion, and the socket insertion portion is rotated with the socket insertion portion inserted into the socket of the other header tube, and the inner peripheral surface of the socket of the header pipe is rotated by the rotation. And the outer peripheral surface of the socket fitting portion of the sleeve tube, and the outer peripheral surface of the spigot of the header tube material and the inner peripheral surface of the spigot fitting portion of the sleeve tube are friction-fused.

According to a ninth aspect of the present invention, a pipe end sealing structure (hereinafter, referred to as a “sealing structure of the ninth aspect”) of the header tube material according to the ninth aspect of the present invention is any one of the first to third aspects. 8. The cap tube according to claim 6, wherein at least the inner peripheral surface of the receiving port and the outer peripheral surface of the spigot are formed of crosslinked polyethylene, and at least the outer peripheral surface of the convex portion and the inner peripheral surface of the concave portion of the cap according to claim 6 or 7. Is formed of non-crosslinked polyethylene, and the cap is fitted in a state in which the convex portion is fitted into the socket of the tube material for the header at the tube end, or the spigot of the tube material for the header at the tube end is fitted into the concave portion. The pipe is rotated about an axis, and frictionally fused to the header pipe so that the pipe end of the header pipe is closed by the rotation.

In the present invention, the material of the pipe for the header is preferably cross-linked polyethylene as in the connection structure of claim 8 and the sealing structure of claim 11, but is preferably cross-linked polypropylene, non-cross-linked polyethylene, non-cross-linked polypropylene,
Polyvinyl chloride or the like may be used.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.
This will be described in detail with reference to the drawings. FIG. 1 shows an embodiment of a header tube according to the present invention.

As shown in FIG. 1, this header tube 1
a is formed of cross-linked polyethylene, and includes a header main pipe 2 and two branch pipes 3. The header main pipe section 2 is provided with a spigot 21 at one end and a receptacle 22 at the other end.

The receiving port 22 has an inner diameter of 2 toward the pipe end.
The diameter of the pipe is enlarged so that pipes of different diameters can be connected. The two branch pipes 3 are connected to the header main pipe 2
Projecting in parallel from the side wall surface in the same direction, and the inner diameter is increased in two steps toward the pipe end, so that pipe members having different diameters can be connected.

FIG. 2 shows another embodiment of the header tube according to the present invention. As shown in FIG. 2, the header tube 1b is the same as the header tube 1a except that the number of branch pipes 3 is three.

FIG. 3 shows two header tubes 1a (1b).
1 illustrates one embodiment of a sleeve tube of the present invention used for joining together. As shown in FIG. 3, the sleeve tube 4a is formed of non-crosslinked polyethylene, and has a receiving port 22 of the header tube 1a (1b) at one end.
And a spigot insertion portion 42 into which the spigot 21 of the header tube 1a is inserted at the other end. A gear 43 is formed on the outer peripheral surface of the sleeve tube 4a.

FIG. 4 shows another embodiment of the sleeve tube of the present invention. As shown in FIG. 4, the sleeve tube 4b is the same as the sleeve tube 4a except that the inner diameter of the spigot 42 'is smaller than the inner diameter of the spigot 42 of the sleep tube 4a. ing.

FIG. 5 shows an embodiment of the cap of the present invention for closing the pipe end of the header pipe 1a. As shown in FIG. 5, the cap 5 is formed of non-crosslinked polyethylene, and has a convex portion 51 having an outer diameter fitted on the receiving port 22 of the header tube 1a at one end and a header portion at the other end. A recess 52 into which the spigot 21 of the tube 1a is fitted is provided. A gear 53 is formed on the outer peripheral surface of the cap 5.

FIG. 6 shows one of the headers formed by using the connection structure of the pipe material for a header and the pipe end sealing structure of the present invention.
One embodiment is shown. As shown in FIG.
The header 6 is connected via a sleeve tube 4a in a state where two header tubes 1a have their branch tubes 3 turned in the opposite direction, and one header tube 1a.
Is closed by a cap 5.

That is, as shown in FIG. 7, the two header pipes 1a and the sleeve pipe 4a are fitted with the socket fitting portion of the sleeve pipe 4a into the socket 22 of one header pipe 1a. In a state where the spigot 21 of the other header tube 1a is fitted into the spigot insertion portion 42 of 4a, the two header tubes 1a are fixed in position by a clamp device (not shown), and then a motor (not shown). The gear 7 that rotates by the driving force of the above is engaged with the carrier 43 of the sleeve tube 4a, and the sleeve tube 4a is rotated around its axis by the driving force of the motor. Then, by this rotation, the socket 22 of the header tube 1a and the socket fitting portion 4 of the sleeve tube 4a are formed.
1, and the friction surface is temporarily melted by frictional heat generated at the interface between the spigot fitting portion 42 of the sleeve tube 4a and the receiving fitting portion 41 of the header tube 1a, and then the rotation of the sleeve tube 4a is stopped. Then, the molten portion is fused and solidified by cooling.

The cap 5 has a convex portion 51 fitted into the socket 22 of one of the header tubes 1a, which is a tube end, and the header tube 1a is clamped by a clamping device in the same manner as the sleeve tube 4a. And is fused to the header tube 1a.

FIG. 8 shows another embodiment of a header formed by using the connection structure of the header tube material and the tube end sealing structure of the present invention. As shown in FIG. 8, the header 7 is formed by fusing two header pipes 1b each having three branch pipe sections 3 via a sleeve pipe 4a such that all the branch pipe sections 3 face in the same direction. At the same time, the structure is the same as that of the above-mentioned bedder 6 except that the cap 5 and the spigot 21 of the header tube 1a are fused in a state where the spigot 21 at the pipe end is fitted into the concave portion 52 of the cap 5.

Although not shown, a pipe member made of cross-linked polyethylene or the like can be fused to the branch pipe section 3 through the sleeve pipes 4a and 4b.

Header material 1a, 1b, sleeve tube 4
Since a, 4b and cap 5 are configured as described above, the following excellent effects can be obtained. (1) The header tubes 1a and 1b are
Has a spigot 21 at one end and a receiving port 22 at the other end, so that if the sleeve tubes 4a (4b) are used, they can be connected one after another to form the header 6 of a desired length, and can be branched. The direction and number of the tubes 3 can be freely changed. That is, various types of headers can be formed only by preparing small-sized header tubes 1a and 1b. Only a small number of molds need to be manufactured, which can reduce equipment costs and storage costs. As a result, the construction cost of the header can be reduced.

(2) Since the header tubes 1a and 1b are made of cross-linked polyethylene, the obtained header 6 has excellent heat resistance and mechanical strength. (3) Since the sleeve tube 4a (4b) is formed of non-crosslinked polyethylene having a fusion property to the crosslinked polyethylene, if the sleeve tube 4a (4b) is interposed,
The two header tubes 1a (1b) can be firmly connected by fusion.

(4) Since the inner diameter of the receiving port 22 of the header pipe 1a (1b) is gradually increased toward the pipe end, there are two kinds of sleeve pipes 4b (4a) having different diameters and others. Pipe material can be connected. That is, a larger number of headers can be formed with one type of header tube material 1a (1b). (5) Since the sleep tubes 4a, 4b and the cap 5 are provided with the gear portions 43, 53 on the peripheral surface, the rotational driving force of the motor or the like can be smoothly and easily applied to the gear portions 43, 53 via the gear 7. Can be transmitted. Therefore, the sleeves 4a and 4b and the cap 5 rotate efficiently and smoothly, and the rotational fusion can be performed accurately and quickly.

(6) Since the cap 5 has the convex portion 51 on one side and the concave portion 52 on the other side, both the spigot 21 and the receiving port 22 of the header tube 1a (1b) are closed with one kind of cap. be able to. Therefore, the number of dies can be reduced, and equipment costs can be reduced. As a result, the construction cost of the header can be reduced. (7) Since the cap 5 is formed of non-crosslinked polyethylene, the cap 5 is excellent in fusion bonding with the header tube 1a (1b).

The present invention is not limited to the above embodiment. For example, the following configuration may be used. (1) In the above embodiment, the gear portions 43 and 53 are provided on the sleeve tube 4a and the cap 5, however, the endless belt rotated by the motor is pressed against the peripheral wall of the sleeve tube or the cap and the endless belt is formed by frictional resistance. The rotational driving force of the belt may be transmitted to the sleep tube or the cap.

(2) In the above embodiment, the branch pipe section 3
Are connected via the sleeve tube 4a, but different kinds of header tubes are connected, or three or more header tubes 1a (1b) are connected.
May be connected, and the header may be formed by only one header tube 1a (1b).

(3) In the above embodiment, the branch pipes protrude in the same direction, but they may protrude in different directions. Further, the diameter of the branch pipe portion 3 may be different. (4) In the above-described embodiment, the number of the branch pipe portions 3 is two or three, but may be one or four or more.

(5) In the above-described embodiment, the header tube and the sleeve tube or cap are rotationally friction-welded to each other by rotational friction. After the fusion surface of the sleeve tube or the cap is melted, the header tube and the sleeve tube or the cap may be fitted together and fused (so-called shrink-fitting method). (6) In the above-described embodiment, the two header tubes are connected via the sleeve tube. However, the outer peripheral surface of the spigot and / or the inner peripheral surface of the receiving port of the header tube are made to have a weldability. The sleeve tube need not be used as long as the sleeve tube is formed of a resin.

(7) In the above embodiment, the other pipe material is fused to the branch pipe section via the sleeve pipe. However, a flange is provided at the end of the branch pipe section. After connecting a joint to this flange by flange, a pipe member may be connected via the joint.

[0037]

The header tube according to the present invention is configured as described above, so that it can be easily connected to another header tube. Therefore, it is possible to form a header 6 having a desired length by connecting one after another,
The direction and number of the branch pipe sections 3 can be freely changed. That is, various types of headers can be formed only by preparing the small-sized header tubes 1a and 1b, and the manufacturing cost and storage cost of the header can be reduced.

In particular, according to the header pipe of the second aspect, the header pipes can be directly connected to each other. In addition, according to the third aspect of the present invention, the header tube material is as follows.
Equipment costs can be further reduced.

Since the sleeve tube according to the present invention is constructed as described above, the sleeve tube is formed between the header tube material and the header tube material formed of a synthetic resin having a low fusibility. Can also be connected. In particular, with the sleeve tube of the fifth aspect, rotational fusion can be performed more smoothly.

Since the cap according to the present invention is constructed as described above, it can be closed with a single cap on both the spigot side and the receiving side of the header tube made of a synthetic resin having poor fusibility. Therefore, equipment costs can be reduced. In particular, according to the cap of claim 7, rotational fusion can be performed more smoothly.

Since the connection structure according to the present invention is configured as described above, the strength of the obtained header is excellent, and the connection strength and the watertightness of the connection portion are also excellent.

Since the sealing structure according to the present invention is configured as described above, the obtained header has excellent strength, as well as excellent bonding strength and watertightness of the sealing portion.

[Brief description of the drawings]

FIG. 1 is a sectional view showing one embodiment of a header tube according to the present invention.

FIG. 2 is a cross-sectional view showing another embodiment of a header tube according to the present invention.

3A and 3B show one embodiment of a sleeve tube according to the present invention. FIG. 3A is a longitudinal sectional view, and FIG. 3B is a half sectional view in a side view.

4A and 4B show another embodiment of a sleeve tube according to the present invention, wherein FIG. 4A is a front view thereof, and FIG. 4B is a half sectional view in a side view.

5A and 5B show an embodiment of a cap according to the present invention, wherein FIG. 5A is a front view thereof, and FIG. 5B is a half sectional view in a side view.

FIG. 6 is a cross-sectional view showing one embodiment of a connection structure and a closing structure according to the present invention.

FIG. 7 is a cross-sectional view for explaining a rotational fusion method for obtaining the connection structure of FIG. 6;

FIG. 8 is a sectional view showing another embodiment of the connection structure and the closing structure according to the present invention.

[Explanation of symbols]

 1a, 1b Header pipe material 2 Main pipe section 21 Spout 22 Reception port 3 Branch pipe section 4a, 4b Sleeve pipe 41 Spout insertion section 42 Reception port insertion section 43, 53 Gear section 5 Cap 51 Convex section 52 Concave section 6 Header 7 gear

Claims (9)

[Claims] 1. A main pipe part formed of a synthetic resin and constituting a header, and a branch pipe part branched from a side wall surface of the main pipe part, a spigot is formed at one end of the main pipe part, A header tube with a socket at the other end. 2. The header tube according to claim 1, wherein the spigot is formed to have a size that fits into the socket. 3. The header tube according to claim 1, wherein the inner diameter of the receiving port is increased stepwise at least two steps toward the other end. 4. The header tube according to any one of claims 1 to 3, which is formed so that it can be externally fitted from one end to the spout of the header tube according to any one of claims 1 to 3, and can be internally fitted into the socket of the header tube from the other end. At least the inner peripheral surface of the spigot fitting portion externally fitted to the spigot and the inner peripheral surface of the spigot fitting portion internally fitted to the socket are the outer peripheral surface of the spigot of the header tube material and the inner peripheral surface of the socket. A sleeve tube for connecting a header tube made of a synthetic resin material that can be fused with the header tube. 5. A connecting sleeve tube for a header tube according to claim 4, further comprising a gear portion on a peripheral surface of which a gear for transmitting a driving force from the rotary driving device meshes. 6. A header projecting into one end of the header tube according to any one of claims 1 to 3, which can be fitted into a socket of the header tube, and a spout of the header tube recessed at the other end surface. And at least the outer peripheral surface of the convex portion and the inner peripheral surface of the concave portion are formed of a synthetic resin material that can be fused to the outer peripheral surface of the spout and the inner peripheral surface of the receptacle of the header tube. Cap for closing the pipe end of header tubing. 7. The cap for closing a pipe end of a header tube according to claim 6, further comprising a gear portion on a peripheral surface of which a gear for transmitting a driving force from a rotary driving device meshes. 8. The header tube according to any one of claims 1 to 3, wherein at least the inner peripheral surface of the socket and the outer peripheral surface of the spigot are formed of cross-linked polyethylene. 5. At least the inner peripheral surface of the spigot fitting portion and the outer peripheral surface of the socket fitting portion of the sleeve tube according to 5 are made of non-crosslinked polyethylene, and one of the sleeve tubes has a header tube material in the spigot fitting portion. Of the header tube is rotated in a state where the socket fitting portion is fitted in the socket of the other header tube material, and the socket inner peripheral surface of the header tube material and the socket fitting portion of the sleeve tube are rotated by the rotation. An outer peripheral surface and a connection structure of a header tube material in which a header outer peripheral surface of a header tube material and an inner peripheral surface of a spigot insertion portion of the sleeve tube are friction-fused. 9. The header tube according to any one of claims 1 to 3, wherein at least the inner peripheral surface of the socket and the outer peripheral surface of the spigot are formed of crosslinked polyethylene. 7. The cap according to claim 7, wherein at least the outer peripheral surface of the convex portion and the inner peripheral surface of the concave portion are formed of non-crosslinked polyethylene, and the convex portion is fitted into the socket of the header tube material at the tube end, or the tube end is inserted into the recess. 10. The cap according to claim 9, wherein the cap is rotated around its axis in a state where the spigot of the header tube is fitted, and the cap is friction-fused to the header tube so as to close the tube end of the header tube by the rotation. Item 11. A pipe end sealing structure for a header material according to Item 10.