JP5174519B2 - Fitting for hot water supply - Google Patents

Description

  The present invention relates to a joint for hot water supply, which is made of synthetic resin and to which a hot water supply pipe is connected.

  Conventionally, there has been a header as a joint to which a hot water supply pipe is connected (for example, see Patent Document 1). As shown in FIG. 8, the header 21 is composed of a header main body 22, an auxiliary joint 23 attached to the header main body 22 using screws 24, and the like. A hot water supply pipe 25 was attached to the auxiliary joint 23 in the header 21.

JP 2007-218415 A

  By the way, in the said conventional header 21, since the header main body 22 and the auxiliary joint 23 were assembled | attached with the bis | screw 24, the assembly operation | work was required and was troublesome. In addition, when the entire header 21 is formed of a synthetic resin, it may be lighter and easier to handle than a metal product, but it may be difficult to ensure sufficient strength as a header (joint).

  The present invention has been made to solve the above-described conventional drawbacks, and an object of the present invention is to provide a joint for hot water supply that can ensure strength with a simple configuration. .

In order to achieve the above object, a joint for hot water supply according to the present invention has the following configuration. That is,
The joint for hot water supply according to the first aspect of the present invention is a joint made of synthetic resin provided with a connection port to which a hot water supply pipe is connected. This joint includes a plurality of layers of synthetic resin members including a tubular joint body and a tubular outer layer body that covers the outside of the joint body by insert molding. Here, the joint body comprises a cylindrical receptacle for receiving the water supply hot water pipe in order to watertightly between the water supply hot water pipe therein. On the other hand, the outer layer body includes a preventer mounting portion that covers the entire outer periphery of the receiving port and that is extended longer than the tip of the receiving port and is mounted with a preventing device for preventing the hot water pipe from coming off. The receiving port and the prevention device mounting portion constitute the connection port , and the joint body and the outer layer body are relatively synthetic resins in which the outer layer body has higher rigidity than the joint body. ing from the material.

According to this joint, by forming a multilayer structure of the joint body and the outer layer body, the outer layer body can restrict the joint body from being pushed by the internal water pressure. The joint body is in contact with water and directly receives the water pressure, and the outer layer body is provided with a preventer mounting portion for restricting the joint body from spreading due to the water pressure and preventing the hot water pipe from coming off. The synthetic resin material to be used can be selected according to the functions of the joint body and the outer layer body. Thus, although this joint is made of synthetic resin, the strength of the joint can be ensured with a simple configuration of a multilayer structure of the joint body and the outer layer body. Moreover, since the joint body and the outer layer body are relatively made of a synthetic resin material whose rigidity is higher than that of the joint body, the outer layer body having high rigidity firmly receives the expansion of the joint body due to water pressure, and By means of the preventer mounting part to which the preventer is mounted, it is possible to accurately prevent the hot water pipe from coming off at the connection port.

  Moreover, the joint for hot water supply which concerns on invention of Claim 2 is a joint of Claim 1, The said outer layer body covers the whole outer surface of the said joint main body.

  Further, the joint for hot water supply according to the invention described in claim 3 is the joint according to claim 1 or 2, wherein the outer layer body includes a joint fixing portion for fixing the joint to the fixed portion. Prepare.

  Moreover, the joint for hot water supply which concerns on invention of Claim 4 is a joint of any one of Claim 1 thru | or 3, The said joint is a branch pipe joint, Comprising: As said hot water supply pipe And a plurality of branch pipe connection ports as the connection ports to which branch pipes as the feed water hot water pipes are connected.

According to the joint for hot water supply according to the present invention, the strength of the joint can be ensured with a simple structure of a multilayer structure of the joint body and the outer layer body while being made of synthetic resin. In addition, the outer layer body having high rigidity firmly receives the expansion of the joint body due to water pressure, and the prevention tool mounting portion to which the prevention tool is attached can accurately prevent the hot water pipe from coming off at the connection port. .

  Hereinafter, the best mode for carrying out the joint for hot water supply according to the present invention will be described with reference to the drawings.

  1 to 6 show an embodiment of the present invention. Reference numeral 1 in the figure denotes a hot water supply pipe for supplying water or hot water. 2 is a synthetic resin joint provided with a connection port 2a to which the hot water pipe 1 is connected.

The joint 2 includes a plurality of layers of synthetic resin members including a tubular joint body 3 and a tubular outer layer body 4 that covers the outside of the joint body 3 by insert molding. Here, in particular, the outer layer body 4 covers the entire outer surface of the joint body 3. Joint body 3 includes 3c a cylindrical socket for receiving therein the feed water hot water pipe 1 so as to watertightly between the water supply hot water pipe 1. And the outer layer body 4 is provided with the prevention tool attachment part 4c which covers the whole outer periphery of the receiving port 3c, is extended longer than the front-end | tip of the receiving port 3c, and the prevention tool 5 for preventing the water supply hot water pipe 1 from falling out is attached. . Therefore, the receiving port 3c and the prevention tool mounting portion 4c constitute the connection port 2a.

  Specifically, the joint 2 is a branch pipe joint, and includes a main pipe connection port 201 as the connection port 2a to which the main pipe 101 as the hot water supply pipe 1 is connected. The joint 2 includes a plurality of branch pipe connection ports 202 as the connection ports 2a to which the branch pipes 102 as the hot water supply pipes 1 are connected. More specifically, the joint 2 includes a main tube portion 2b having the main tube connection port 201, and a plurality of branch tube portions extending sideways from the main tube portion 2b and having the branch tube connection port 202. 2c.

  Specifically, the joint 2 includes a header as a branch pipe joint. The joint 2 includes the main tube portion 2b and a plurality of branch tube portions 2c and 2c branched from the main tube portion 2b in the orthogonal direction. And the front-end | tip part of the main cylinder part 2b becomes the said main pipe connection port 201 to which the main pipe 101 as the hot water supply pipe 1 is connected. In the illustrated embodiment, both tip portions of the main tube portion 2b serve as a main pipe connection port 201, and the main pipe 101 can be connected to either of them. Moreover, in the branch cylinder part 2c, itself becomes the said branch pipe connection port 202 to which the branch pipe 102 as the hot water supply pipe 1 is connected.

  On the other hand, the joint 2 includes the joint body 3 and the outer layer body 4 formed by inserting the joint body 3. Here, the joint body 3 is made of, for example, a PPS (polyphenylene sulfide) resin material. The joint body 3 includes a first main tube portion 3d constituting the main tube portion 2b, and a leading end portion of the first main tube portion 3d receives the main tube 101, and a main tube receiving port 301 as the receiving port 3c. Become. And the coupling main body 3 is extended toward the side from the 1st main cylinder part 3d (in the illustrated embodiment, it branches in the orthogonal direction from the 1st main cylinder part 3d), and the said branch cylinder part The first branch cylinder part 3e which comprises 2c is provided, The branch pipe receptacle 302 as the said receptacle 3c which receives the said branch pipe 102 is provided in the 1st branch cylinder part 3e. The main pipe receiving port 301 and the branch pipe receiving port 302 have a large-diameter portion 3f formed with a large diameter at the tip. And the ring member 6 is assembled | attached to the front-end | tip of these receptacles 301 and 302 (3c), The groove | channel 3g by which packing 7, such as an O-ring, fits the base end part of the large diameter part 3f by this ring member 6. It has become. Thus, the packing 7 is in close contact with the peripheral surface of the distal end portion 1a of the hot water supply pipe 1, so that the joint body 3 is kept watertight between the hot water supply pipe 1 (see FIG. 5). The ring member 6 is made of the same material as that of the outer layer body 4 described later in detail.

  The outer layer body 4 is made of, for example, a nylon resin material containing fibers such as glass fibers. That is, the joint body 3 and the outer layer body 4 are made of a synthetic resin material in which the outer layer body 4 is relatively higher in rigidity than the joint body 3. In particular, the joint body 3 and the outer layer body 4 are relatively made of the joint body 3 made of a soft synthetic resin material and the outer layer body 4 made of a hard synthetic resin material. Whether it is soft or hard is determined by the elastic modulus of the material (especially the bending elastic modulus), that is, the rigidity. If the elastic modulus is relatively small, it is soft, and if it is large, It is hard. The outer layer body 4 includes a second main cylinder portion 4d that is formed by inserting the joint body 3 together with the ring member 6 to form the main cylinder portion 2b. And the front-end | tip part of this 2nd main cylinder part 4d becomes the main pipe | tube prevention tool attachment part 401 as the said prevention tool attachment part 4c to which the prevention tool 5 for preventing the said main pipe | tube 101 from falling off is attached. The outer layer body 4 extends laterally from the second main tube portion 4d (in the illustrated embodiment, branches in the orthogonal direction from the second main tube portion 4d), and the branch tube portion A branch as the prevention tool mounting portion 4c. A tube protector mounting portion 402 is provided. As shown in FIGS. 4 to 6, the preventer mounting portions 401 and 402 (4 c) have a housing hole 4 f in which the engaging body 8 that is mounted and fixed to the hot water supply pipe 1 is housed. The preventer mounting portion 4c has holes 4h that open to the outer peripheral portion thereof (specifically, open to the respective protector insertion portions 4g that protrude from the four outer peripheral portions of the preventer mounting portion 4c). It is opened so as to cross the accommodation hole 4f.

  The outer layer body 4 includes a joint fixing portion 4j for mounting and fixing the joint 2 to a fixed portion such as a wall. The joint fixing portion 4j is formed to project in a cylindrical shape between the adjacent branch tube portions 2c and 2c. And although illustration is abbreviate | omitted, in the joint fixing | fixed part 4j part, the coupling 2 is directly fixed and fixed to a to-be-fixed part using fixing tools, such as a screw, or a to-be-fixed part via an attachment auxiliary member. It is fixed and attached to.

  As shown in FIG. 4, the engaging body 8 is formed in a cylindrical shape, and is fixedly attached to the outer periphery of a position (a rear position of the distal end portion 1 a) that is reserved from the distal end of the hot water supply pipe 1. In the illustrated embodiment, the engaging body 8 includes a split ring 8a and a main body ring 8b. The split ring 8 a is formed in a C-shaped cross section in which one portion of the cylinder is divided in the axial direction, and is fitted on the outer periphery of the hot water supply pipe 1. And the outer peripheral surface of this split ring 8a becomes a taper surface inclined so that a diameter may become large toward the front end direction side of the hot water supply pipe 1. FIG. On the other hand, the main body ring 8b is fitted on the outer periphery of the split ring 8a and reduces the diameter of the split ring 8a so that the split ring 8a press-contacts the hot water supply pipe 1. The main body ring 8b has a cylindrical shape, and the inner peripheral surface thereof is a tapered surface that is inclined so as to become larger in diameter toward the distal end side of the hot water supply pipe 1 like the outer peripheral surface of the split ring 8a. Yes. In addition, the code | symbol 9 is an in-core in the figure, This in-core 9 is inserted in the hot water supply pipe 1 before the engaging body 8 is attached.

  The prevention tool 5 is made of, for example, a metal wire and is formed in a substantially U-shape (see FIG. 6). The preventer 5 is configured such that the opposed pieces 5a and 5a, which are substantially U-shaped, are inserted into the holes 4h of the preventer mounting part 4c so as to sandwich the hot water supply pipe 1, and are engaged with the rear end of the engagement body 8. Match. At this time, the intermediate piece 5b connecting the opposing pieces 5a, 5a in the preventer 5 is hooked on the hook 4i provided on the preventer mounting 4c, and the preventer 5 is thus attached to the preventer mounting 4c. The engagement body 8 and eventually the hot water supply pipe 1 are prevented from coming off from the connection port 2 a of the joint 2 by the prevention tool 5.

  According to the joint 2, the outer layer body 4 can restrict the joint body 3 from being expanded by being pushed by the internal water pressure by adopting a multilayer structure of the joint body 3 and the outer layer body 4. And the joint main body 3 contacts water and receives the water pressure directly, and the outer layer body 4 restricts the joint main body 3 from spreading due to the water pressure and prevents the water supply hot water pipe 1 from coming off. 4c is provided, and the synthetic resin material to be used can be selected according to the functions of the joint body 3 and the outer layer body 4 respectively. Thus, although this joint 2 is made of a synthetic resin, the strength of the joint 2 can be ensured with a simple configuration of a multilayer structure of the joint body 3 and the outer layer body 4.

  In particular, since the joint body 3 is soft and has high impact resistance, the joint body 3 can withstand impact due to fluctuations in water pressure. Since the outer layer body 4 is hard and has high rigidity, the expansion of the joint body 3 due to water pressure is firmly received, and the water supply at the connection port 2a is performed by the preventer mounting part 4c to which the preventer 5 is mounted. It is possible to accurately prevent the hot water pipe 1 from coming off.

  Furthermore, since the joint 2 has a multi-layer structure including a joint body 3 that contacts water and an outer layer body 4 provided so as not to contact water, the joint body 3 has chlorine resistance and heat resistance. For the outer layer body 4, a material whose performance is relatively lower than that of the joint body 3 can be selected. Therefore, the outer layer body 4 can be made of a material that is completely different from the material having the performance required for the joint body 3, and the joint 2 is made of an inexpensive material for the joint body 3 having a plurality of performances. Overall material costs can be reduced. Of course, a material having higher performance than the joint body 3 may be used as the material of the outer layer body 4.

  Moreover, since the joint 2 includes a plurality of layers of the joint body 3 and the outer layer body 4 formed by insert molding, the thickness can be increased by suppressing nests and sink marks in order to increase the strength.

  In addition, this invention is not necessarily limited to embodiment mentioned above, A various other change is possible. For example, in the joint 2, even if both end portions of the main tube portion 2 b do not become the main tube connection port 201, as shown in FIG. 7, one end portion of the main tube portion 2 b becomes the main tube connection port 201, and the main tube portion The other tip of 2b may be a branch pipe connection port 202. In the illustrated embodiment, the branch tube portion 2c extends from the main tube portion 2b toward both opposite sides, and the branch tube portions 2c and 2c themselves are connected to the branch pipe connection ports 202 and 202, respectively. It has become.

  In addition, the joint 2 is not just a branch pipe joint in which the main pipe 101 and the branch pipe 102 are connected as the hot water hot water pipe 1 in order to branch the hot water or water. May be a straight joint, an elbow joint, or a branch pipe joint such as a T-shape or a cross shape.

Further, the material of the joint body 3 and the outer layer body 4 is not limited to the above-described material (however, the outer layer body 4 is relatively made of a synthetic resin material having higher rigidity than the joint body 3) . Various materials suitable for each function can be selected. Further, the ring member 6 may not be made of the same material as that of the outer layer body 4, but may be made of the same material as that of the joint body 3, or may be made of other materials. Further, the ring member 6 may be formed integrally with the joint body 3 or the outer layer body 4 without being separated from the joint body 3 or the outer layer body 4.

Moreover, although it is a reference example, the joint main body 3 and the outer layer body 4 may not consist of different materials, but may consist of the same material.

  Further, the outer layer body 4 may be provided so as to cover only the receiving port 3 c of the joint body 3, for example, without covering the entire outer surface of the joint body 3.

It is a perspective view of one embodiment of this invention, (a) shows a joint main part and (b) shows a joint covered with an outer layer body. Similarly, it is sectional drawing of a coupling main body. Similarly, it is a sectional view of a joint. Similarly, it is an expanded sectional view which shows the process of connecting a hot water supply pipe to the connection port of a coupling. Similarly, it is an expanded sectional view which shows the state which connected the hot water pipe to the connection port. Similarly, it is sectional drawing by the AA line in FIG. It is a perspective view of other embodiments of this invention, (a) shows a joint main part and (b) shows a joint covered with an outer layer object. It is sectional drawing which shows the conventional header.

DESCRIPTION OF SYMBOLS 1 Water supply hot water pipe 101 Main pipe 102 Branch pipe 2 Joint 2a Connection port 201 Main pipe connection port 202 Branch pipe connection port 3 Joint main body 3c Receiving port 4 Outer layer body 4c Prevention tool attachment part
4j Joint fixing part 5 Prevention tool

Claims (4)

A joint made of synthetic resin provided with a connection port to which a hot water supply pipe is connected ,
A cylindrical joint body, and a cylindrical outer layer body that covers the outside of the joint body by insert molding, are provided with a plurality of synthetic resin members,
The joint body is provided with a cylindrical receptacle for receiving the water supply hot water pipe in order to watertightly between the water supply hot water pipe therein,
The outer layer body includes a preventer mounting portion that covers the entire outer periphery of the receiving port and that is extended longer than the tip of the receiving port and to which a preventing device for preventing the water hot water pipe from coming off is mounted.
The receiving port and the prevention device mounting portion constitute the connection port , and the joint body and the outer layer body are made of a synthetic resin material in which the outer layer body is relatively higher in rigidity than the joint body. such Rukoto and said, fittings for water supply hot water.   The joint for hot water supply according to claim 1, wherein the outer layer body covers the entire outer surface of the joint body.   The joint for hot water supply according to claim 1 or 2, wherein the outer layer body includes a joint fixing portion for attaching and fixing the joint to the fixed portion.   The joint is a branch pipe joint, and includes a main pipe connection port as the connection port to which a main pipe as the water supply hot water pipe is connected, and a branch pipe as the water supply hot water pipe is connected. The joint for hot water supply according to any one of claims 1 to 3, comprising a plurality of branch pipe connection ports as mouths.

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