JPH0331910Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention is useful for connecting the inside and outside of an appliance exterior wall, such as connecting outside and inside piping, such as an inlet pipe or a hot water outlet pipe, using the exterior body of a water heater as a boundary wall. Related to piping connection devices. .

<Prior art and its problems> Conventionally, for water inlet pipes and hot water outlet pipes in water heaters, etc., the connection of the inner and outer pipes on the exterior body wall was structured as shown in the cross section of Fig. 3 or the structure shown in the cross section of Fig. 4. . That is, a connecting fitting 4 integrated with the inner pipe 3 by brazing or the like is fitted into the joint pipe body 2 inserted from the outside to the inside of the instrument exterior body wall 1, and the screw 5 is fixed (the third Figure), appliance exterior wall 1
The inner pipe 6 was fitted into the joint pipe body 2 inserted from the outside to the inside, and fixed with a quick fastener 7 (FIG. 4).

However, in the conventional device described above, since the joint pipe body 2 protrudes inside the wall 1, the piping space for the inner pipes 3 and 6 becomes narrow. In addition, it is necessary to tighten and fix the device with screws or the like inside the wall 1, which has the disadvantage that it is not easy to operate.

<Purpose> Therefore, the present invention solves the drawbacks of the above-mentioned conventional technology,
A large space can be secured for the inner piping installed inside the instrument exterior body, and the operation for assembling the connecting part for connecting the inner piping can be easily performed. The purpose of this invention is to provide a connection device for internal and external piping in an appliance exterior wall.

<Means for Solving the Problems> The connecting device for internal and external piping in the appliance exterior wall of the present invention is provided in the appliance exterior body wall, and has a through hole formed by connecting a small hole and a large hole for inserting a washer. and an inner piping portion inserted through the large hole and seated in the small hole, a washer that is passed through the inner piping while being secured to the inner piping, and a fitting hole into which the inner piping from the through hole is inserted. , and an outer joint tube body fixed to the wall surface of the instrument exterior body with a flange formed at the tip and sandwiching the washer between the flange and the wall surface of the instrument exterior body.

<Operation> Insert the inner pipe that has passed through the washer through the large hole of the through hole, move it to the small hole and seat it, fit the outer joint pipe body to the seated inner pipe, and then attach the instrument exterior body with the flange. The assembly configuration is completed by fixing it to the wall.

Since no special equipment for connecting the inner and outer pipes is installed in the space inside the appliance exterior wall where the inner pipes are arranged, the space for the inner pipes is not narrowed. Further, since the flange of the outer joint tube body only needs to be fixed to the instrument exterior wall from the outside, there is no need for tightening work on the inside as in the conventional art. Therefore, assembly work is very easy.

<Example> FIG. 1 is a sectional view of an apparatus for implementing the present invention, and FIG. 2 is a view of the apparatus for implementing the invention as seen from inside the exterior wall of the instrument.

The outer joint pipe body 2 is attached to the exterior wall 10 of the water heater.
0 is fixed to the outer surface of the wall 10 by a flange 21 at its tip. 22 is a fixing screw. An outside pipe (not shown) is connected to the outside joint tube body 20. A stepped fitting hole 23 is provided on the distal end side of the outer joint tube body 20. 30 is an inner pipe. Two protrusions 31 and 32 are provided at the tip of the inner pipe 30, and an O-ring 40 and a spacer 50 are fitted between the two protrusions 31 and 32. 60 is Watshiya. The washer 60 is attached to the protrusions 31 and 32 of the inner pipe 30.
It is passed through the inner piping 30 from the side opposite to the side where the tube is located, and is prevented from coming out by a protrusion 32.
Further, the flange 21 of the outer joint tube body 20 is provided with a shallow recess 24 for receiving the washer 60 flush therewith.

The instrument exterior wall 10 is provided with a through hole in which a large hole 11 and a small hole 12 are connected. The large hole 11 has a size that allows the washer 60 to be inserted therethrough, and the small hole 12 has a slightly larger diameter than the inner pipe 30.

To explain how to install the device, first, install the inner pipe 30 with the O-ring 40 and washer 60 attached.
In order to pass the washer 60, it is inserted through the large hole 11 to the outside of the wall 10, and then the inner pipe 30 is moved laterally and seated in the small hole 12. Then, insert the fitting hole 23 of the outer joint pipe body 20 into the inner pipe 30.
and fix it to the wall 10 with screws 22.
This completes the assembly of the configuration shown in FIG. Since the protruding portion 32 is prevented from coming off by the washer 60, the inner pipe 30 is held in the fitted state.

Note that the inner pipe 30 may be provided with the protrusions 31 and 32 on the pipe 30 itself, or a tip member having the protrusions 31 and 32 is connected to the distal end portion of the inner pipe 30. Good too. The inner pipe 30 of the present invention also includes a pipe having a connected end member.

<Effects> The present invention has the above-described configuration, and since no connecting members other than the inner piping are arranged inside the appliance exterior body, the piping of the inner piping has become extremely easy to perform.

In addition, instead of the conventional method of fixing in two places, it can now be fixed in one place, which saves time and the need for fixing tools, making it more economical.

In particular, since the fixing can be done from outside the instrument exterior, installation is extremely easy.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an apparatus for implementing the present invention, FIG. 2 is a view of the apparatus for implementing the present invention as seen from inside the exterior wall of the instrument, and FIGS. 3 and 4 are cross-sectional views of the conventional apparatus, respectively. 10...Exterior wall, 11...Large hole, 12...Small hole, 20...Outer joint pipe body, 21...Flange, 23...Fitting hole, 30...Inner piping, 31,
32... protrusion, 40... O-ring, 60... washer.

Claims (1)

[Scope of utility model registration request] A through-hole provided in the wall of the exterior body of the appliance, in which a small hole and a large hole for inserting a washer are connected; an inner piping portion inserted through the large hole and seated in the small hole; and the inner piping. The washer is fixed to the wall surface of the instrument exterior body by a flange formed at the tip, and the washer is fixed to the wall surface of the instrument exterior body by a flange formed at the tip. 1. A device for connecting internal and external piping in an appliance exterior wall, comprising: an outer joint pipe body held between the wall surface of the appliance exterior body;