JPH0978646A - Pipe connection structure of mixing faucet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate assembling properties, and to reduce the cost. SOLUTION: A body 11 and pipes 21, 22 are connected by screwing screws 21a, 22a, 31a, 32a. Consequently, this connection structure differs from connection structure by brazing, and the thermal deformation and thermal discoloration of the pipes 21, 22 can be prevented while even an unskilled operator can connect the body 11 and the pipes 21, 22 easily. Accordingly, the cost can be reduced remarkably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixed faucet capable of switching and mixing water and hot water.
The present invention relates to a connection structure between a pipe and a body of a mixed faucet.

[0002]

2. Description of the Related Art Conventionally, two pipes are attached and fixed to a body of a mixed faucet by brazing. One pipe is a water supply pipe connected to a water pipe, and the other pipe is a hot water supply pipe connected to a pipe extending from a boiler or a water heater. When water is discharged from the discharge port of the mixed faucet, the discharge port and the water supply pipe are connected by operating the handle. As a result, hot water is discharged from the discharge port. Further, when hot water is discharged from the discharge port, the discharge port and the hot water supply pipe are connected by operating the handle. As a result, hot water is discharged from the discharge port. In this way, the mixed faucet can discharge water or hot water, and both by mixing them from one discharge port by a common handle operation.

[0003]

However, the above-mentioned conventional mixed faucet has the following problems. (1) Equipment is required for brazing the body and the pipe, and it is time-consuming and costly.
Further, since brazing work requires skill, the number of workers is limited.

(2) There is a problem that the pipe is deformed and discolored by the heat at the time of brazing, and the number of defective products increases. (3) The body can be plated only after brazing the pipe. This is because when the brazing is performed after the body plating, the plating is peeled off or discolored due to the heat when the brazing is performed. Therefore, the body is plated after the pipe is brazed to the body.
When the body is plated after brazing, the pipe is an obstacle and the plating work is difficult.

(4) After the pipe connecting step to the body and the plating step of the body, a water pressure inspection (water leakage inspection) of the product is performed. Here, for example, the body is abnormal (leakage)
In addition, even if the leak occurs only from the brazing part, the body (which may include the pipe) cannot be reused. The reason is that after the inspection, it is necessary to heat the brazed portion and re-braze again, which causes the problem (3). Therefore, there is a problem in that a good-quality body or pipe cannot be reused and the yield is deteriorated.

The present invention has been made in order to solve the above problems, and a first object thereof is to provide a pipe connection structure of a mixed faucet capable of reducing the cost.

A second object is to provide a pipe connection structure for a mixed faucet capable of preventing discoloration and deformation of the pipe. A third object is to provide a pipe connection structure of a mixed faucet capable of plating the body before connecting the pipe to the body.

A fourth object of the present invention is to provide a pipe connection structure for a mixed faucet capable of improving the yield.

[0009]

In order to achieve the above object, in the invention according to claim 1, in a pipe connection structure of a mixed faucet, a water supply pipe and a hot water supply pipe are connected to a body, The gist of the at least one pipe is that the pipe is connected to the body by screwing.

According to the second aspect of the present invention, at least one of the pipe and the body is provided with a packing fixing portion to which a packing for maintaining airtightness between the pipe and the body is fixed. Is the gist.

The gist of the invention according to claim 3 is that the body is provided with a steady rest for preventing the swing of the pipe with respect to the body. In the invention according to claim 4, the gist is that the steady rest is formed of a plate having an insertion hole through which at least one pipe is inserted, and the plate is fixed to the body.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the body 11 constituting the mixed faucet is made of bronze casting,
A discharge nozzle 12 is rotatably provided on the outer peripheral surface thereof. In addition, a handle lever 13 is provided on the upper portion of the body 11.
Is provided. A tightening nut 14 is screwed onto the outer peripheral surface of the lower portion of the body 11. By sandwiching the mounting base 16 such as a sink between the tightening nut 14 and the fixed end surface 15 of the body 11, the mixing faucet (body 11) is mounted on the mounting base 1.
It is attached and fixed to 6.

A water supply pipe 21 and a hot water supply pipe 22 are connected to the lower end surface of the body 11. A pipe (not shown) such as a water pipe is connected to the water supply pipe 21,
A pipe (not shown) extending from a boiler, a water heater, or the like is connected to the hot water supply pipe 22. A switching valve (not shown) is arranged in the body 11, and by operating the handle lever 13, the switching valve is provided between the discharge nozzle 12 and the water supply pipe 21 or between the discharge nozzle 12 and the hot water supply pipe 22. And the communication between the discharge nozzle 12 and both pipes 21 and 22 is blocked.

Next, the body 11 and both pipes 21 and 2
The connection structure with 2 will be described. As shown in FIGS. 1 to 3, a water supply side inflow hole 31 and a hot water supply side inflow hole 32 that communicate with the discharge port 12 are formed in the lower end surface of the body 11. Screw holes 31a, 32a are formed in both holes 31, 32, respectively. In addition, both the inflow holes 31, 32
The opening edge of is formed to have a larger diameter than the screw portions 31a and 32a. Therefore, the step surfaces 31b and 32b are provided between the openings of the inflow holes 31 and 32 and the screw portions 31a and 32a.
Are formed.

Screws 21a and 22a are formed on the outer peripheral surfaces of the tips of the pipes 21 and 22, respectively. In addition, the screw 21
A concave groove 2 as a packing fixing portion is formed on the outer peripheral surface of the pipes 21 and 22 on the base end side of the portion where a and 22a are formed.
1b and 22b are squeezed. This groove 21
An O-ring 34 as a packing is engaged with b and 22b. The O-ring 34 is restricted from moving in the axial direction with respect to the pipes 21 and 22 by engaging with the concave grooves 21b and 22b.

When connecting the pipes 21 and 22 to the body 11, the screws 21a and 22a of the pipes 21 and 22 are screwed into the screw portions 31a and 32a of the inflow holes 31 and 32 of the body 11. As a result, the pipes 21 and 22 are connected to both the inflow holes 31 and 32 of the body 11, respectively. Then, after connecting the pipes 21 and 22 to the body 11, the pipes 21 and 22 are respectively inserted into the pipe insertion holes 35 formed in the plate 36 as the steadying member. The pipe insertion hole 35 is formed to have a diameter slightly larger than the diameter of the pipes 21 and 22. Pipe 2 into the pipe insertion hole 35
After inserting 1 and 22, the plate 35 is fixed to the body 11 with screws 37.

As described above, the two pipes 2 are attached to the body 11.
1, 22 are connected. In the present embodiment, the body 11
The following effects can be obtained by making the connection structure between the pipes and the pipes 21 and 22 as described above.

(1) Since the body 11 and the pipes 21, 22 are connected by screwing the screws 21a, 22a, 31a, 32a, no equipment for brazing is required. Further, the screws 21a, 22a, 31a, 32a can be screwed together easily by a person who does not require any skill without requiring a special machine or jig. This allows
Significant cost reduction can be achieved.

(2) Since the body 11 and the pipes 21, 22 are connected by screwing the screws 21a, 22a, 31a, 32a, deformation and discoloration of the pipes 21, 22 due to heat can be prevented, and defective products are generated. Can be reduced and the yield can be improved.

(3) Since the body 11 and the pipes 21, 22 are connected by screwing the screws 21a, 22a, 31a, 32a, even after the body 11 is plated, the pipe 21, 22 connections are possible. As a result, during the plating process of the body 11, the pipe 2
The body 11 can be plated smoothly without the 1 and 22 getting in the way.

(4) Screws 21a, 22a, 31a, 32
The body 11 and the pipes 21 and 2 are simply released by unscrewing a.
The connection with 2 can be easily released. As a result, leakage of the pipes 21, 22 and the body 11 and the pipe 21,
Even when a leak from the connection portion with 22 is detected, they can be separated from each other without damaging the body 11 and the pipes 21 and 22. As a result, a defect-free component (body 11 or pipes 21 and 22) can be reused and reused, and the yield can be improved.

(5) Grooves 21b and 22b for holding the O-ring 34 are formed on the outer peripheral surfaces of the pipes 21 and 22. As a result, when connecting the pipes 21 and 22 to the body 11,
It is possible to prevent the O-ring 34 from being displaced in the axial direction with respect to the pipes 21 and 22, and to improve the assembling property of the mixed water faucet.

(6) The plate 36 is provided on the lower end surface of the body 11.
Is fixed, and the O-ring 34 is sandwiched between the plate 36 and the step surfaces 31a and 32b of the inflow holes 31 and 32. As a result, the O-ring 34 is prevented from being lifted up by the water pressure, and the body 11 and the pipe 2 are more reliably prevented.
Airtightness with 1 and 22 can be maintained.

Further, the plate 36 allows the body 11
It is possible to prevent the pipes 21 and 22 from swaying. As a result, even if an external force is applied to the pipes 21 and 22, the pipes 2
It is possible to prevent damage to the screws 21a and 21b of the Nos. 1 and 22.

The present invention can also be configured as follows. (1) The present invention is embodied such that only one of the water supply pipe 21 and the hot water supply pipe 22 is connected to the body 11 by screwing.

(2) To embody the present invention without providing the grooves 21b and 22b for holding the O-ring 34 in the pipes 21 and 22. (3) To embody the present invention without mounting the plate 36.

[0027]

According to the invention described in claim 1, the cost can be reduced. Further, discoloration and deformation of the pipe can be prevented. In addition, the body can be plated before connecting the pipe to the body. In addition, the yield can be improved.

According to the invention described in claim 2, according to claim 1,
In addition to the effect of the invention described in (1), when connecting the body and the pipe, the packing can be prevented from being displaced, and the assembling property can be improved. In addition, the airtightness between the body and the pipe can be improved.

According to the invention described in claim 3, according to claim 1
Alternatively, in addition to the effect of the invention as set forth in claim 2, since the pipe can be prevented from swinging, the pipe can be prevented from being damaged.

According to the invention of claim 4, claim 3
In addition to the effect of the invention described in (1), it is possible to more reliably prevent the pipe from swinging.

[Brief description of drawings]

FIG. 1 is a side view of a mixed faucet according to an embodiment.

FIG. 2 is a partial cross-sectional view of a body and a pipe in a non-connected state.

FIG. 3 is a partial cross-sectional view of a connected state of a body and a pipe.

FIG. 4 is a bottom view of the connected state of the body and the pipe.

[Explanation of symbols]

11 ... Body, 21 ... Water supply pipe, 22 ... Hot water supply pipe, 21a, 22a ... Screw, 34 ... O as packing
Rings, 21b, 22b ... Recessed groove as packing fixing portion, 35 ... Pipe insertion hole, 36 ... Plate as steady rest member.

Claims (4)

[Claims] 1. A pipe connection structure of a mixed faucet in which a water supply pipe and a hot water supply pipe are connected to a body, wherein at least one of the pipes is connected to the body by screwing. A structure for connecting a mixed faucet. 2. The mixed water according to claim 1, wherein at least one of the pipe and the body is provided with a packing fixing portion to which a packing for maintaining airtightness between the pipe and the body is fixed. Plug pipe connection structure. 3. The steady body is mounted on the body so as to prevent the pipe from swinging relative to the body.
Alternatively, the pipe connection structure of the mixed faucet according to claim 2. 4. The pipe connection for a mixed faucet according to claim 3, wherein the steady rest is formed of a plate having an insertion hole through which at least one pipe is inserted, and the plate is fixed to the body. Construction.