JPH0329668Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a fixture for a refrigerant pipe or the like of a vehicle air conditioner.

[Conventional technology]

Conventionally, for example, in automobile air conditioners, refrigerant piping that leads refrigerant from refrigeration cycle equipment such as a compressor installed in the engine room to the evaporator in the instrument panel inside the vehicle compartment separates the engine room and the passenger compartment. Penetrate the darts panel,
The structure is such that it is fixed at that part. Its structure is as explained in the cross-sectional view of Fig. 5.
If vibrations generated by pulsation of the refrigerant gas inside are transmitted to the dash panel 2, it may cause noise, so the refrigerant pipe 1 is held and fixed to the panel 2 by a vibration isolating member 10 made of an elastic material such as rubber. It has a structure.

The refrigerant pipe insertion hole is made larger than the outer diameter of the refrigerant pipe 1 so as not to come into contact with the outer peripheral surface of the refrigerant pipe 1. Therefore, in order to prevent the air inside the engine room from entering the passenger compartment through the gap and thereby impairing the feeling of air conditioning, a grommet 11 made of an elastic material such as rubber is provided separately in the gap. It was designed to seal the gap.

[Problem that the invention attempts to solve]

However, in the conventional pipe fixing structure as described above, the vibration isolating member 10 for holding the pipe and the grommet 11 for sealing are constructed separately, so when the pipe is fixed, it is fixed with the pipe holding member 10. After that, the work of assembling the sealing grommet 11 is extremely difficult, increasing the number of assembly steps, and each component must be molded and manufactured separately, which also causes an increase in price.

[Means for solving problems]

Therefore, in order to solve the above-mentioned problems, the present invention combines an elastic member with a pipe holding part that holds the pipe, and a sealing member that is formed integrally with the pipe holding part and seals the pipe insertion hole provided in the panel. The system adopts the method of composing the system into two parts.

[Effect]

According to the above means, since the pipe holding part and the sealing part are integrally formed, it is possible to simultaneously hold the pipe and seal the pipe insertion hole with one component.

[Effect of idea]

Therefore, compared to the case where the pipe holding member and the sealing member are manufactured separately, the manufacturing cost is reduced and at the same time, the assembly work is very easy because they are integrated.

〔Example〕

The present invention will be described below based on embodiments shown in the drawings. Figures 1a and 1b are a front view and a cross-sectional view taken along the line AA of the present invention, respectively.
2 is a refrigerant pipe of a vehicle air conditioner, and 2 is a darts panel (plate-shaped member) that partitions an engine compartment (not shown) of the vehicle from an interior of the vehicle. Reference numeral 3 denotes an elastic member for holding and fixing the refrigerant pipe 1 and at the same time sealing the refrigerant pipe insertion hole 2a provided in the dash panel 2, and is made of a rubber material such as ethylene propylene rubber (EPDM). And its shape is shown in Figure 2 a and b.
As shown in the front view and the BB sectional view, the overall shape in front view is approximately oval, and the refrigerant pipe 1
The pipe holding part 3a, which is a thick walled part for inserting and holding the refrigerant pipe 1, has two insertion holes 3b having approximately the same diameter as the outer diameter of the refrigerant pipe 1. As shown in FIG. 3, a notch 3c is provided to facilitate the insertion of the refrigerant pipe 1.

Moreover, this elastic member 3 has a sealing part 3e consisting of a thin skirt-like part that seals between the outer peripheral surface of the refrigerant pipe 1 and the refrigerant pipe insertion hole 2a, and the outer peripheral surface of this sealing part 3e is It is configured so that it is sealed by coming into contact with the inner circumferential surface of the insertion hole 2a and closing the gap.

Reference numeral 4 denotes a metal or resin clamp for holding the elastic member 3 and fixing the refrigerant pipe to the dash panel 2, and includes a C-shaped band portion 4a that holds the outer peripheral surface of the elastic member 3, and a cleavage portion of this band portion 4a. The elastic member 3 is made up of a tightening part 4b that fixes and holds the elastic member 3 by tightening the elastic member 3 with a bolt 5, and a fixing part 4c that is integrally connected to the band part 4a. A fixing grommet 6 is inserted into a keyhole-shaped fixing hole 4d provided in the fixing part 4c, and the clamp 4 is fixed to the dash panel 2 with a washer 7 in between and a bolt 8 and a nut 8a. Note that 9 is a metal or resin collar that defines the margin of death of the fixing grommet.

To explain the operation in the above configuration, the elastic member 3 connects the band portion 4a of the clamp 4 to the bolt 5.
The elastic member 3 is tightened and fixed by tightening the elastic member 3 even if vibration occurs in the refrigerant pipe, such as when pulsation occurs in the flow of refrigerant in the refrigerant pipe 1.
Since the vibration of the refrigerant pipe is absorbed by the fixing grommet 6, almost no vibration of the refrigerant pipe is transmitted to the dash panel 2, and noise is prevented from being transmitted into the vehicle. Also, the sealing part 3e
The outer circumferential surface of is in close contact with the inner circumferential surface of the pipe insertion hole 2a, and by sealing the gap formed between the insertion hole 2a and the outer circumferential surface of the refrigerant pipe 1, hot air in the engine room can be removed. In addition, it is possible to prevent the air conditioning function from deteriorating and the occupants from feeling uncomfortable due to cold air entering the vehicle interior at low temperatures. Since this sealed portion has a thickness of approximately 2 mm, vibrations from the refrigerant piping are hardly transmitted to the dash panel 2.

Next, an assembly operation for fixing the refrigerant pipe 1 using the elastic member will be explained. After the refrigerant pipe 1 is inserted into the insertion hole 3b by pushing out the notch 3c of the holding part 3a of the elastic member 3, the band part 4a of the clamp 4 is fitted into the holding part 3a, and the tightening part 4b is tightened and fixed with the bolt 5. . Then, fit the fixing grommet 6 into the fixing hole 4d provided in the fixing part 4c of the clamp 4, and then insert the fixing grommet 6 into the through hole 6 of the fixing grommet.
After passing the collar 9 through a, the washer 7 is used as a holding plate and the bolt 8 is passed through the sealing part 3e.
After the nut 8a is elastically pushed into the insertion hole 2a and sealed, the nut 8a is screwed onto the bolt 8 and fixed.

Next, other embodiments of the present invention will be explained.
The sealing portion 3e of the elastic member 3 in the present invention may be formed in such a shape that its base portion widens outward, as shown in a cross-sectional view in FIG. Sealing can also be achieved by pressing against the peripheral edge of the insertion hole 2a.

[Brief explanation of drawings]

1A and 1B are a front view and a sectional view taken along the line A-A of the pipe fixing structure of the present invention, and FIGS. 3 is a sectional view illustrating the process of holding the refrigerant pipe 1 in the elastic member 3, FIG. 4 is a sectional view illustrating the shape of another embodiment of the present invention, and FIG. FIG. 2 is a sectional view illustrating the shape of a conventional pipe fixing structure. 1... Refrigerant piping, 2... Dash panel, 3...
...Elastic member, 3a...Piping holding part, 3e...Sealing part.

Claims (1)

[Scope of Claim for Utility Model Registration] A pipe fixing device for inserting and fixing a pipe through a pipe insertion hole provided in a plate-like member, which holds the pipe from its outer periphery and is formed from an elastic member. a sealing part that is formed integrally with the pipe holding part and seals between the outer circumferential wall of the pipe and the inner circumferential wall of the pipe insertion hole; A piping fixture comprising a clamp that is fixed to.