JPS646461Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention relates to a vehicle body panel penetrating structure for negative pressure piping.

<Prior Art> As shown in FIGS. 1 and 2, the negative pressure piping 1 has conventional negative pressure hoses 2 and 3 fixed to a vehicle body panel penetration part (e.g., a dash lower panel penetration part) 4. The connection is made through a grommet 5 for the piping 1, and more specifically, the connectors 8 and 9 are fitted into the grommet 5 from the indoor side 6 and the engine room side 7 separately. (Refer to Utility Model Application No. 55-110310). Such negative pressure piping 1 penetrates and seals into the vehicle body panel penetration part 4 before and after the heater unit 10 is attached to the vehicle body, and the heater unit 10, as shown in FIGS. 3 and 4, When the heater unit 10 is attached to the vehicle body with the heater hose grommet 12 fixed in advance to the case 11 of the heater unit 10 and the heater hose 13 inserted therethrough, the heater hose grommet 12 is inserted into the vehicle body panel penetrating portion 14.
As a result, the vehicle body panel penetration part 1
The heater hose 13 is passed through and sealed with respect to 4. In addition, 15 in the figure is the heater core, 1
6 is a vehicle body panel, and 17 is a sound insulating material.

<Problems to be solved by the invention> However, in the case of such a structure in which the negative pressure piping 1 penetrates the vehicle body panel, the negative pressure piping 1 [specifically, Connect the negative pressure hoses 2 and 3 to the grommets 5.
The vehicle body panel penetration part 4 that fixes the grommet 5 and the vehicle body panel penetration part 14 that fixes the heater hose grommet 12 are located relatively close to each other, and the negative pressure pipe 1 is made of a relatively hard material. Therefore, when the heater unit 10 is attached to the vehicle body, there is a possibility that the negative pressure pipe 1 may be deformed by the heater unit 10 or, in extreme cases, may be crushed.

This idea was created by focusing on the conventional negative pressure piping structure that penetrates the vehicle body panel.The heater hose grommet has the function of a negative pressure piping grommet, so that when the heater unit is installed on the vehicle body, it can be attached to the heater hose together with the heater hose grommet. The purpose is to solve the problems of the conventional method by penetrating and sealing the negative pressure piping to the vehicle body panel penetration part.

<Means for solving the problem> The structure of this invention for solving the above problem is added to the heater hose grommet fixed to the case of the heater unit, in addition to the first insertion hole for the heater hose. For negative pressure piping that has a continuous vertical hole in the same direction and a groove in the cross direction with respect to the first insertion hole, and that can be freely inserted into the bent part of the negative pressure piping that is aligned with the case surface of the heater unit. second insertion holes are respectively formed, and when the heater unit is attached to the vehicle body, the negative pressure piping together with the heater hose is penetrated and sealed into the vehicle body panel penetration portion.

<Function> Negative pressure piping is arranged in advance on the case surface of the heater unit, the bent part of the negative pressure piping is placed along the case surface, and then when fixing the heater hose grommet to the case, the first insertion Insert the heater hose into the hole and the negative pressure pipe into the second insertion hole.
Insert. At this time, since the second insertion hole is continuously provided with a vertical hole in the same direction and a groove in a cross direction with respect to the first insertion hole of the heater hose grommet, the bent part of the negative pressure piping can be easily touched from the piping axis direction. And the second
It can be fitted and inserted into the insertion hole.

If the heater hose grommet is fixed to the vehicle body panel penetrating portion when the heater unit is attached to the vehicle body, the negative pressure pipe will also be penetrated and sealed as well as the heater hose penetrating and sealing the vehicle body panel penetrating portion.

<Example> This invention will be explained below based on the drawings. FIGS. 5 and 6 are diagrams showing an embodiment of this invention. The heater hose grommet 22 fixed to the case 21 of the heater unit 20 is provided with a first insertion hole 24 for the heater hose 23.
In addition to the insertion hole 24, a second insertion hole 26 for a negative pressure pipe 25 is formed in the heater hose grommet 22. This second insertion hole 26 is for penetrating and inserting the negative pressure piping 25 that is placed in advance along the surface of the case 21, and for this reason, this second insertion hole 26 is similar to the first insertion hole 26.
A vertical hole 27 extending in the same direction as the insertion hole 24 and a groove 28 extending in a cross direction are continuously provided. The groove 28 is formed so as to be recessed from one side surface 29 of the heater hose grommet 22, and can be moved with one touch from the axial direction of the negative pressure piping 25, especially the bent portion 30, which has been placed along the surface of the case 21. It has a shape that makes it easy to fit and insert. Negative pressure piping 2
As mentioned above, since the clips 5 are to be placed along the surface of the case 21 of the heater unit 20 in advance, a plurality of clips 31 are provided on the surface of the case 21, and in order to correspond to the external shape of the case 21, metal negative pressure A connector for piping or negative pressure piping can be employed as the negative pressure piping 25.

Next, a method of penetrating and sealing the negative pressure pipe 25 into the vehicle body panel 32 will be explained. First, the negative pressure pipe 25 is installed on the case 21 surface of the heater unit 20 in advance.
is placed through the clip 31, with its bent portion 30 aligned with the surface of the case 21,
Next, attach the heater hose grommet 22 to the case 21.
When fixing the heater hose 2 to the first insertion hole 24,
3 and the negative pressure pipe 25 are fitted and inserted into the second insertion hole 26 (see FIG. 5). At this time, the second insertion hole 26 is connected to a groove 28 recessed from one side 29 of the heater hose grommet 22 and this groove 2.
Since the vertical hole 27 is continuously formed at 8, the bent portion 30 of the negative pressure pipe 25 can be fitted and inserted into the second insertion hole 26 from the axial direction of the pipe with a single touch.

When the heater unit 20 is attached to the vehicle body, if the heater hose grommet 22 is fixed to the vehicle body panel penetration portion 33, the heater hose 23 can be penetrated and sealed to the vehicle body panel penetration portion 33, and the negative pressure pipe 25 can also be penetrated and sealed. It will be sealed.

<Effects of the invention> As explained above, according to this invention, the negative pressure piping penetrating structure through the vehicle body panel is attached to the heater hose grommet that is fixed to the case of the heater unit.
In addition to the first insertion hole for the heater hose, this first
A groove for negative pressure piping that has a continuous vertical hole in the same direction and a groove in the cross direction with respect to the insertion hole, and can be inserted into the bent part of the negative pressure piping that is aligned in advance with the case surface of the heater unit. 2 insertion holes are formed respectively, and when the heater hose is installed on the vehicle body, the negative pressure piping is passed through and sealed to the vehicle body panel penetration part, so the work of passing the negative pressure piping through the vehicle body panel is significantly simplified. Prior to penetration work, the negative pressure piping can be fitted and inserted into the second insertion hole of the heater hose grommet from the piping axis direction with a single touch, making it extremely easy and reliable to attach the negative pressure piping to the heater hose grommet. There is.

Furthermore, by aligning the negative pressure piping along the case surface of the heater unit in advance, the negative pressure piping and the heater unit can be integrated, and the negative pressure piping can be prevented from being deformed or crushed by the heater unit as in the conventional case. It can be completely resolved. In addition, it is possible to omit a grommet dedicated to negative pressure piping, which has been considered necessary in the past, thereby making it possible to reduce the number of parts and costs.

[Brief explanation of the drawing]

Figure 1 is an exploded perspective view of the negative pressure piping and grommet.
Fig. 2 is a sectional view showing a conventional example of a vehicle body panel penetrating structure for negative pressure piping, Fig. 3 is a perspective view showing a state in which a conventional heater hose grommet is fixed to the heater unit case, and Fig. 4 is 5 is a cross-sectional view showing a state in which the heater hose is penetrated and sealed through the heater hose grommet in the vehicle body panel penetration part.
The figure shows the negative pressure piping inserted into the heater hose grommet.
FIG. 6 is a perspective view showing the inserted state, and FIG. 6 is a cross-sectional view showing an embodiment of the vehicle body panel penetrating structure for negative pressure piping according to this invention. 1, 25... Negative pressure piping, 4, 14, 33... Vehicle body panel penetration part, 10, 20... Heater unit, 11, 21... Heater unit case, 1
2, 22... Heater hose grommet, 13, 2
3... Heater hose, 16, 32... Vehicle body panel, 24... First insertion hole, 26... Second insertion hole,
27...vertical hole, 28...groove, 30...bending part.

Claims (1)

[Scope of utility model registration request] In addition to a first insertion hole for the heater hose, the heater hose grommet fixed to the case of the heater unit has a vertical hole in the same direction and a groove in a cross direction with respect to the first insertion hole. A second insertion hole for the negative pressure piping is formed in each case so that the bent part of the negative pressure piping that has been placed along the unit's case surface can be inserted into the bent part of the negative pressure piping. Vehicle body panel penetration structure with negative pressure piping that penetrates and seals the panel penetration part.