JP2000291866A - Pipe connection structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hose or pipe connection structure simple in machining and low in costs. SOLUTION: A hose fitting 4 of a hose 2 is bent at right angles, a seal part 41 at a tip of the hose fitting 4 is fitted to a connection port 1B of a casing 1A, a straight portion 4X on a base portion side of the hose fitting 4 is fixed to a fixed base 1C by bolts 6 using a fixing fitting 5, and the hose 2 is connected to the connection port 1B of a compressor 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose or pipe connection structure.

[0002]

2. Description of the Related Art For example, in a cooling device for an automobile, a piping member such as a hose and a pipe is connected to a compressor, a condenser,
Conventionally, when connecting a pipe to equipment such as a receiver tank or an evaporator, a hose fitting is attached to a tip of a hose or a pipe, and a fixing tool such as a cap nut fixed to the tip of the hose fitting is used. (See, for example, Japanese Utility Model Application Laid-Open No. 63-53095 and Japanese Utility Model Application Laid-Open No. 61-13158).
No. 9).

[0003]

However, according to the above-mentioned conventional method, it is necessary to process a fixing tool and assemble the fixing tool to the tip of a hose fitting or the like. However, there is a problem that it takes time and effort and the cost must be high.

An object of the present invention is to provide a piping connection structure which can solve the above-mentioned problems in the prior art.

[0005]

According to the present invention, there is provided a pipe connection structure for connecting a hose to a connection port of a required object, and the hose is bent into a required shape. One end of the connection pipe member is attached to the connection end of the hose, and the other end of the connection pipe member is connected to the connection port by clamping a hose-side portion of the connection pipe member to the connected object. There is proposed a pipe connection structure that is fitted airtightly.

According to the present invention, there is also provided a pipe connection structure for connecting a pipe to a connection port of a required pipe connection structure, wherein the connection end of the pipe is bent into a required shape to form a connection pipe portion. And a pipe connection structure is proposed in which the connection pipe portion is clamped to the connected body on the base side so that the distal end of the connection pipe portion is fitted in the connection port in an airtight manner. .

According to the above construction, since the connecting pipe member or the connecting pipe portion is clamped and fixed, the flange of the connecting portion can be eliminated, the shape of the pipe can be simplified, the processing can be facilitated, and the cost can be reduced. Can be.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a piping connection structure diagram showing a partial section of an example of an embodiment of a piping connection portion to which a piping connection structure according to the present invention is applied. FIG. 1 shows an example in which a hose 2 for supplying refrigerant is pipe-connected to a connection port 1B which forms a recess provided in a casing 1A of a compressor 1 of a vehicle air conditioner. End 2B
Is connected to the connection port 1B by a hose fitting 4 fixed as a connection pipe member by a socket 3.

The hose fitting 4 has one end 4A fixed to the end 2B of the hose body 2A by a known means using the socket 3, and the other end 4B has a seal 4
1 is formed.

The seal portion 41 is formed by housing an O-ring 41B in an annular groove 41A formed on the outer peripheral surface of the hose fitting 4, and when the seal portion 41 is fitted into the connection port 1B, the seal portion 41 is closed. The O-ring 41B presses against the inner peripheral surface 1Ba, whereby the seal portion 41 can be fitted airtight to the connection port 1B.

The hose fitting 4 is bent at a substantially right angle at a substantially central portion thereof into an L-shape, whereby the hose fitting 4 has a base-side straight portion 4X including one end 4A and a distal end including the other end 4B. A straight portion 4Y is formed.

The hose fitting 4 is connected to the compressor 1 while maintaining the airtight fit between the sealing portion 41 and the connection port 1B.
In this embodiment, the base-side linear portion 4X is fixed to a fixing base 1C integrally formed with the casing 1A by a fixing metal fitting 5 so that the fixing base 5C can be fixed to the casing 1A.

Referring to FIG. 2, the fixing of the base-side linear portion 4X to the fixing base 1C by the fixing bracket 5 will be described in detail. The fixing base 1C has a cross section for receiving the lower portion of the base-side linear portion 4X. Positioning groove 1C which is an arc-shaped shallow dent
a is formed. On the other hand, the fixing metal member 5 is a metal member having a shape formed by integrally extending the grip portion 5B from the base portion 5A.
The bolt 6 is passed through the through hole 5Aa provided in the base 5A, and the bolt 6 is screwed into the screw hole 1Cb of the fixing base 1C.
Thus, by fixing the fixing metal member 5 to the fixing base 1C, the base-side linear portion 4X is gripped and fixed between the positioning groove 1Ca and the grip portion 5B.

As a result, the hose fitting 4 is fixed to the casing 1A of the compressor 1 without the necessity of providing a fitting such as a flange at the tip of the hose fitting 4.
The sealing portion 41 provided at the other end 4B of the
B can be airtightly fitted, and this airtight fit can be maintained. That is, the hose 2 can be connected to the compressor 1 by piping. Here, since the hose fitting 4 is bent at a right angle, when the base-side linear portion 4X is clamped, the distal-side linear portion 4Y is aligned with the connection port 1B, and reliable airtight fitting can be easily obtained. Note that reference numeral 4C
The other end 4B of the hose fitting 4 has a connection port 1B for a predetermined length.
An outward flange formed integrally with the hose fitting 4 so as to be inserted therein. Reference numerals 5C, 5
D is a reinforcing flange for providing the necessary rigidity of the fixture 5 to the fixture 5.

Since the hose 2 is connected to the connection port 1B of the compressor 1 by a pipe as described above, the seal portion 41 formed at the distal end of the hose fitting 4 is connected to the connection port 1B.
B airtightly fitted to the base side straight portion 4X of the hose fitting 4.
Is fixed on the fixing base 1C using the fixing metal fittings 5 and the bolts 6 to perform the pipe connection work. In addition, there is no need to attach a fixing fitting to the tip of the hose fitting 4 through a complicated process, and simply fix the fixing fitting 5 to the base-side straight portion 4X of the hose fitting 4 with a bolt and fix it with simple processing. As a result, the cost for connecting the pipes can be reduced.

The fixing of the hose fitting 4 to the compressor 1 is not limited to a configuration in which the hose fitting 4 is fixed using the fixing fitting 5 and the bolt 6.

For example, as shown in FIG. 3, a bracket 31 is integrally provided on the socket 3, a bolt 6 is passed through a through hole 31A of the bracket 31, and the bolt 6 is screwed into a screw hole 1C.
b, whereby the hose fitting 4 may be fixed to the fixing base 1C in a state where the seal portion 41 is fitted in the connection port 1B in an airtight manner.

In the above description, a configuration in which the hose fitting 4 of the hose 2 is bent to connect the pipes has been described. However, the present invention is not limited to the connection of the hoses to the pipes. The present invention can be applied in exactly the same manner.

That is, in the case of pipe connection,
The tip of the pipe to be connected to the pipe is bent in exactly the same manner as for the hose fitting 4, thereby forming a connecting pipe portion corresponding to the hose fitting 4.
A sealing portion is formed at the distal end of the connecting pipe portion, and the sealing portion is hermetically fitted to the connecting port, and a fixing metal fitting is used to fix the base portion of the connecting pipe portion, preferably a straight line on the base side. What is necessary is just to fix a part to the case etc. of a to-be-connected body.

The application of the pipe connection structure according to the present invention is not limited to the above-described embodiment.

FIG. 4 is a perspective view showing an embodiment in which hoses 21 and 22 are connected to the cylindrical body 1D made of aluminum die-casting of the compressor 1 by piping. Here, a pipe connection block B is integrated with the cylindrical main body 1D.
1, B2 are formed. Piping connection block B1,
The configuration of B2 is basically the same as the configuration including the connection port 1B and the fixing base 1C shown in FIG. 1, a fixing base 1C is provided near the connection port 1B, and the hose fittings 214 of the hoses 21 and 22 are provided. , 224 are bolted to the corresponding fixing base 1C by fixing fittings 215, 225, and the hose fittings 21
4 and 224 are hermetically fitted to the corresponding connection ports 1B.

Here, the hose fitting 214 of the hose 21 is bent in the same manner as the hose fitting 4 shown in FIG. 1, but the hose fitting 224 of the hose 22 has its base-side straight portion 224X connected to its hose body 22A. It is further bent to match the extension direction of.

FIG. 5 is a perspective view showing another embodiment according to the present invention, in which two hoses 23 and 24 are connected to the receiver tank 60 with one fixing fitting 235. In the case of this embodiment, a fixing base 60C is provided in the receiver tank 60, the hose fittings 234, 244 of the hoses 23, 24 are aligned with the positioning grooves 60Ca, 60Cb of the fixing base 60C, and the fixing fitting 235 is bolted. The hoses 23 and 24 are fixed at the same time by being fixed to the fixing table 60C by 236. In addition, each seal part 2321 of the hoses 23 and 24,
The hermetic fitting between the 2421 and the connection port on the receiver tank 60 side is the same as that in FIG. 1, but the detailed description thereof is omitted here.

FIG. 6 is a perspective view showing an embodiment of the present invention when the hose 25 is connected to the condenser 70 by piping. In the example shown in FIG.
The pipe connection block 71C is provided by brazing or the like, and the seal portion 2521 formed on the hose fitting 254 of the hose 25 is connected to the connection port 71 of the pipe connection block 71C.
B to the hose fitting 254 and the fitting 2 for fixing.
55 is fixed by a bolt 256. This embodiment is basically the same as the pipe connection structure shown in FIG.

FIG. 7 is a perspective view showing an example in which the hose 26 and the pipe 27 are connected to the valve device 80 using one fixing fitting 265 according to the present invention. The embodiment shown in FIG. 7 differs from the embodiment shown in FIG.
It is greatly different only in that only one hose is a hose and the remaining one is a pipe, and that the hose 26 and the pipe 27 have the same piping direction, but is basically the same as the embodiment of FIG. .

The end of the pipe 27 is bent at a right angle to form a connection pipe 274 corresponding to the hose fitting 4. Further, a seal portion 2721 is formed at the tip of the connection pipe portion 274.

The hose 26 and the pipe 27 are fixed to the positioning grooves 80Ca and 80Cb of the fixing base 80C of the valve device 80 by using a single fixing metal fitting 265, and the sealing part 2621 of the hose 26 and the pipe 27 are fixed. Seal part 27
21 is a corresponding connection port 80Ba of the valve device 80,
The hose 26 and the pipe 27 are pipe-connected to the valve device 80 by airtight fitting with 80Bb. here,
The pipe 27 is fixed to the fixed base 8 by holding the base-side straight portion 274X of the connecting pipe portion 274 by the fixing metal fitting 265.
Fixed to 0C.

Although the embodiment in which the hose or the pipe is connected by the pipe according to the present invention has been described above, in any case, a configuration in which the connecting portion of the hose fitting or the pipe is bent at a right angle is required. As described above, in a configuration that requires bending at a right angle, if the accuracy of the bending angle is not within a predetermined allowable range, the hose fitting or the pipe is fixed to the fixing base using the fixing fitting. In this case, the seal cannot be airtightly fitted to the corresponding connection port.

Therefore, in the case where the connection end seal portion of the hose fitting or pipe is machined at right angles to the clamp portion, FIG.
The right-angle bending process can be performed reliably using the jig 100 shown in FIG. The jig 100 is formed as a member having an L-shaped cross section. The distal end 4M of the hose fitting 4 is passed through a through hole 101A drilled on one side 101 of the jig 100, and the proximal end 4N of the hose fitting 4 is clamped by the clamp 103 of the other side 102, thereby forming the hose fitting. 4
Is accurately held at a right angle, and in this state, a seal portion can be formed on the distal end portion 4M of the hose fitting 4 by the die 200 or the like.

[0031]

According to the present invention, as described above, when a hose is connected to a connection port of a body to be connected by pipe connection, a seal portion formed at a distal end portion of a connection pipe member is airtightly fitted to the connection port. In this case, the pipe connection operation can be performed by a simple operation of clamping and fixing the connection pipe member to the connected object using an appropriate fixing member. Therefore, it is not necessary to attach a fixing fitting to the tip of the connecting pipe member through a complicated process, and the structure is simple and the construction is easy, so that the cost of connecting pipes can be reduced.

[Brief description of the drawings]

FIG. 1 is a connection structure diagram partially showing an example of an embodiment of a pipe connection portion using a pipe connection structure according to the present invention.

FIG. 2 is an exploded perspective view of a main part for describing in detail fixing of the base-side linear portion to the fixing base by the fixing bracket shown in FIG. 1;

FIG. 3 is a perspective view showing a main part of another embodiment of the pipe connection structure according to the present invention.

FIG. 4 is an exploded perspective view showing an embodiment in which a hose is connected to the compressor by piping.

FIG. 5 is an exploded perspective view showing another embodiment according to the present invention, in which two hoses are connected to a receiver tank by using one fixing fitting.

FIG. 6 is an exploded perspective view showing an embodiment of the present invention when a hose is connected to a condenser by piping.

FIG. 7 is an exploded perspective view showing an embodiment in which a hose and a pipe are connected to the valve device by using one fixing fitting according to the present invention;

FIG. 8 is an explanatory view for explaining a process for bending a pipe member at a right angle by a jig.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Compressor 1A Casing 1B, 71B Connection port 1C Fixing base 1D Cylindrical main body 2, 21, 22, 23, 24, 25, 26 Hose 2A Hose main body 3 Socket 4, 214, 224, 254 Hose fitting 4A One end 4B Other end Part 4X Base-side linear part 4Y Tip-side linear part 5, 215, 225, 235, 265 Fixing bracket 27 Pipe 31 Bracket part 41, 2321, 2421, 2521, 2621, 27
21 seal part 60 receiver tank 70 condenser 71C, B1, B2 piping connection block 80 valve device

Claims (6)

[Claims] 1. A pipe connection structure for connecting a hose to a connection port of a required connected body, wherein one end of a connection pipe member bent into a required shape is attached to a connection end of the hose. Wherein the hose-side portion of the connecting pipe member is clamped to the connected body so that the other end of the connecting pipe member is airtightly fitted to the connection port. Construction. 2. The pipe connection structure according to claim 1, wherein the connection pipe member is bent at a substantially right angle, and a hose-side straight portion of the connection pipe member is clamped to the connected body. 3. A seal portion is formed at the other end of the connection pipe member, and the seal portion is inserted into the connection port so that an airtight fit between the connection pipe member and the connection port is provided. The pipe connection structure according to claim 1 or 2, wherein a combined state is obtained. 4. A pipe connection structure for connecting a pipe to a connection port of a required pipe connection structure, wherein the connection end of the pipe is bent into a required shape to form a connection pipe portion, and the connection is formed. A pipe connection structure, characterized in that a front end portion of the connection pipe portion is hermetically fitted to the connection port by clamping a connection pipe portion to the connected body at a base portion side. 5. The pipe connection structure according to claim 4, wherein the required shape is a right-angled shape, and a straight portion on a base side of the connection pipe portion is clamped to the connected body. 6. A seal portion is formed at a distal end portion of the connection pipe portion, and the seal portion is inserted into the connection port so that an airtight fit between the connection pipe portion and the connection port is provided. The pipe connection structure according to claim 4, wherein a combined state is obtained.