JP4127026B2 - Piping grommet structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a U-shaped notch formed at a side edge of a panel and a closing member that abuts the side edge of the panel formed with the U-shaped notch and closes the opening side of the U-shaped notch It is related with the improvement of the piping grommet structure which fills the clearance gap between the pipe penetrated by the through-hole formed by and a through-hole with a grommet.
[0002]
[Prior art]
As shown in FIG. 5, this type of conventional piping grommet structure has a high-pressure pipe 101 connected to the outlet side of a condenser provided in the engine room, and a compressor inlet provided in the engine room. The connected low-pressure pipe 102 is inserted into a U-shaped notch 104 formed in the vehicle body panel 103 and joined to the counterpart pipes 105 and 106 from the evaporator, and then the grommet 107 is utilized using the slit 108. The outer periphery of the high-pressure pipe 101 and the low-pressure pipe 102 is attached so as to wrap, and then the grommet 107 is slid in the axial direction along the outer peripheral surface of the high-pressure pipe 101 and the low-pressure pipe 102 to press-fit the U-shaped notch 104. By stopping, the gap between the high and low pressure pipes 101, 102 and the U-shaped notch 104 is filled. And state, thereby, was supposed to ensure sound insulation and watertight performance of the vehicle body panel through portion (e.g., see Patent Document 1.).
[0003]
[Patent Document 1]
JP-A-5-238251 (first page)
[0004]
[Problems to be solved by the invention]
However, in the conventional grommet structure, in order to assemble the grommet 107, the grommet 107 is first attached to the high-pressure pipe 101 and the low-pressure pipe 102 at a position away from the vehicle body panel 103, and then the grommet 107 is installed. 107 has a structure in which it is slid in the axial direction along the outer peripheral surfaces of the high-pressure pipe 101 and the low-pressure pipe 102 and press-fitted into the U-shaped notch 104, so that either the high-pressure pipe 101 or the low-pressure pipe 102 is used. When the engine room is bent along the surface of the vehicle body panel 103, the grommet 107 cannot be attached to the high-pressure pipe 101 and the low-pressure pipe 102. When grommet 107 cannot be assembled to 104 There was a problem.
[0005]
In the case of a structure in which the pipe penetrates from a direction inclined with respect to a line perpendicular to the vehicle body panel, the grommet 107 can be attached to the high pressure pipe 101 and the low pressure pipe 102, but the body panel 103 There was a problem that the grommet 107 could not be assembled to the U-shaped notch 104.
[0006]
The present invention has been made paying attention to the above-mentioned conventional problems, and has a pipe structure in which a grommet cannot be attached to a pipe at a position away from a panel in which a U-shaped notch is formed. However, even when the pipe penetrates from a direction inclined with respect to a line perpendicular to the panel, a piping grommet structure capable of assembling the grommet to the U-shaped notch of the panel is provided. It is intended.
[0007]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the piping grommet structure according to claim 1 of the present invention includes a substantially U-shaped notch formed at a side edge of the panel and the panel formed with the substantially U-shaped notch. A through-hole is formed by a closing member that contacts the side edge of the substantially closed U-shaped notch and closes the opening side of the substantially U-shaped notch, and a gap between the pipe inserted into the through-hole and the through-hole is formed with a grommet. In the piping grommet structure to fill,
A fitting groove in which the grommet is formed in a substantially U shape along a substantially U-shaped notch edge portion of the substantially U-shaped notch portion, and is fitted to the substantially U-shaped notch edge portion on an outer peripheral surface thereof. A panel side grommet formed with a pipe side grommet made of a flexible elastic member wound around the outer periphery of the pipe,
A groove having a substantially U-shaped cross section into which a small pipe different from the pipe can be inserted is formed on the inner U-shaped inner peripheral surface of the panel side grommet,
By compressing and deforming the pipe-side grommet in the inner U-shape of the substantially U-shaped notch with a pressing force when closing the opening side of the substantially U-shaped notch with the closing member, The means is configured to fill a gap between the small through hole formed by the closing member and the pipe.
[0008]
The pipe grommet structure according to claim 2 of the present invention is the pipe grommet structure according to claim 1, wherein the panel side grommet is constituted by an elastic member .
[0009]
The piping grommet structure according to claim 3 of the present invention is characterized in that, in the piping grommet structure according to claim 1 or 2, the pipe side grommet is formed in a cross-sectional cutout circular shape with a part thereof cut away. As a means.
[0011]
Operation and effect of the invention
In the piping grommet structure according to the first aspect of the present invention, since it is configured as described above, before piping the pipe, first, the panel side grommet is first cut into a substantially U-shaped notch in the fitting groove formed on the outer peripheral surface thereof. After fitting and mounting in a state where the substantially U-shaped notch edge of the portion is press-fitted, the pipe with the pipe side grommet previously mounted on the outer periphery is closed in the state of being mounted in the inner U-shape of the substantially U-shaped notched portion The member is brought into contact with the side edge of the panel to close the opening side of the substantially U-shaped notch, and the elastic force is flexible in the U-shape of the substantially U-shaped notch by the pressing force when closing with the closing member. By compressing and deforming the pipe side grommet made of the member, the gap between the small through hole formed by the panel side grommet and the closing member and the pipe can be filled.
[0012]
As described above, among the grommets, the panel-side grommets are attached to the panel before piping of the pipe, and the pipe-side grommets are structured to be attached to the pipe in advance, so that a U-shaped notch is formed. Even when the pipe structure is such that the grommet cannot be attached to the pipe at a position away from the panel, or when the pipe penetrates from a direction inclined with respect to a line perpendicular to the panel, An effect is obtained that the grommet can be assembled to the U-shaped notch of the panel.
[0013]
In addition, since the pipe-side grommet is made of a soft elastic material as described above, even if the angle at which the pipe is inclined with respect to the line perpendicular to the panel changes, the pipe-side grommet deforms so that the U-shape of the panel The grommet can be assembled to the notch, and the gap between the small through hole and the pipe can be completely filled.
[0014]
Further, since the inner U-shaped inner peripheral surface in the pipe and another small pipe insertable a substantially U-shaped groove in said panel side grommet is formed, fitted with a pre-pipe side grommet to the outer periphery Before installing the pipe in the inner U-shape of the substantially U-shaped notch, the small pipe is installed in the groove having the substantially U-shaped cross section, and then the pipe is inserted into the substantially U-shaped notch. If the closing member is brought into contact with the side edge of the panel and the opening side of the substantially U-shaped notch is closed in a state of being mounted in the inner U-shape, the pressing force at the time of closing with the closing member is substantially U-shaped. The pipe side grommet made of a flexible elastic member is compressed and deformed in the U-shape inside the notch, and the gap between the small through hole formed by the panel side grommet and the closing member and the pipe and the small pipe is completely formed. It becomes possible to be in a buried state.
[0015]
Piping grommet structure of the present invention according to claim 2, wherein the Oite to claim 1, wherein that the panel side grommet is composed of an elastic member, the sealing property between the panel and the panel side grommet, water tightness is increased, Thereby, sound insulation and watertightness can be improved.
[0016]
A pipe grommet structure according to a third aspect of the present invention is the pipe grommet structure according to the first or second aspect , wherein the pipe-side grommet is formed in a cross-sectional cutout circular shape with a part thereof cut away, so that the cutout portion is opened to open the pipe side. Since the grommet can be attached from the side of the pipe, it can be attached at any stage without being restricted by the assembling order, and the assembling work can be simplified.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. The embodiment of the invention corresponds to the invention described in claims 1 to 3.
FIG. 1 is an exploded perspective view showing a main part of a vehicle to which a piping grommet structure of an embodiment of the invention is applied, and FIG. 2 is an assembled state showing a main part of the vehicle to which a piping grommet structure of an embodiment of the invention is applied. FIG. 3 is a longitudinal sectional view taken along line III-III in FIG. 2. In these figures, 1 is a cowl top front panel (panel), 2 is a low pressure pipe (pipe), and 3 is a high pressure pipe (small). Pipe), 4 is a grommet (panel side grommet), 5 is a protector (pipe side grommet), 6 is a hood ridge cover (closing member), 7a is a low pressure pipe side charge valve, 7b is a high pressure pipe side charge valve, and 8 is a dash. Panel 9 indicates a strut tower.
[0018]
More specifically, the cowl top front panel (panel) 1 is located closer to the engine room than the dash panel 8, and by partitioning the inside of the engine room and the vehicle compartment side (dash panel 8), This is a panel provided for the purpose of sound insulation, heat insulation, strength improvement and the like. In addition, the gap 9a between the strut tower 9 is closed with foam rubber (not shown).
A substantially U-shaped notch 11 is formed at the upper edge of the cowl top front panel 1.
[0019]
The low-pressure pipe 2 is an aluminum-made large-diameter pipe connected to the suction side of a compressor (not shown) provided in the engine room, and the high-pressure pipe 3 is also provided in the engine room. A small-diameter pipe made of aluminum connected to the outlet side of a capacitor (not shown). That is, in the embodiment of the present invention, a pipe for circulating and circulating the refrigerant in the air conditioner of the vehicle passes through the cowl top front panel 1 that divides the interior of the engine room from the vehicle compartment side. The example to which this invention was applied to the part which obstruct | occludes a hole is shown.
[0020]
The grommet (panel side grommet) 4 is formed on a substantially U-shaped notch edge of a substantially U-shaped notch 11 formed on the upper edge of the cowl top front panel 1 by a natural rubber material having a predetermined elasticity. It is formed in the substantially U shape along.
A fitting groove 41 for fitting to the substantially U-shaped notch edge is formed on the outer peripheral surface of the grommet 4, and the lower end of the inner peripheral surface of the inner U-shaped 42 of the grommet 4. A groove 43 having a substantially U-shaped cross-section into which the small-diameter high-pressure pipe 3 can be inserted is formed. In the embodiment of the present invention, the groove 43 having a substantially U-shaped cross section is inclined in the lateral direction from the line orthogonal to the cowl top front panel 1 from the beginning in accordance with the piping direction of the high-pressure pipe 3. It is formed with.
[0021]
The protector (pipe side grommet) 5 can be wound around the outer periphery of the large-diameter low-pressure pipe 2 by a foamed rubber material that is a flexible elastic member, and the outer diameter of the protector (grommet) on the inner U-shaped portion 42 of the grommet 4 It is composed of a thick cylindrical body formed larger in diameter than the arc portion. The depth of the inner U-shaped portion 42 of the grommet 4 is formed so as to be shallower than the outer diameter of the protector 5.
[0022]
1, the hood ridge cover (closing member) 6 is surrounded by the cowl top front panel (panel) 1, a dash panel 8, a strut tower 9, and a front fender (not shown). It is a cover which covers the upper surface of the part.
[0023]
The hood ridge cover 6 is made of resin, and is tightened and fixed to the vehicle body side by a plurality of bolt hole 61 portions formed on the outer peripheral edge portion thereof. The upper end opening side of the substantially U-shaped cutout portion 11 is in a closed state in contact with the upper edge of the top front panel 1.
The central portion of the hood ridge cover 6 can be opened and closed by a lid 62 so that various maintenance can be performed while the hood ridge cover 6 is fixed.
[0024]
Next, the operation and effect of the embodiment of the present invention will be described based on the assembly process diagram of FIG.
Since the piping grommet structure of the embodiment of the present invention is configured as described above, first, as shown in FIG. 4 (a), before piping the high pressure pipe 3 and the low pressure pipe 2, the grommet 4 is The fitting groove 41 formed on the outer peripheral surface is fitted and mounted in a state where the substantially U-shaped cutout edge portion of the substantially U-shaped cutout portion 11 is press-fitted.
[0025]
Next, as shown in FIG. 4B, the high-pressure pipe 3 is mounted in a state where the high-pressure pipe 3 is inserted into a groove 43 having a substantially U-shaped cross section formed at the lower end portion of the inner peripheral surface of the inner U-shape 42 of the grommet 4. . In the embodiment of the present invention, the high-pressure pipe 3 is arranged in a state in which it is inclined laterally with respect to a line orthogonal to the cowl top front panel 1.
[0026]
Next, as shown in FIG. 4 (c), the low-pressure pipe 2 having the protector 5 previously attached to the outer periphery is press-fitted and fitted into the inner U-shape 42 of the substantially U-shaped notch 11. In the embodiment of the present invention, the low-pressure pipe 2 is also piped in a state in which it is inclined laterally with respect to a line orthogonal to the cowl top front panel 1.
[0027]
Next, as shown in FIG. 2, after the low-pressure pipe 2 and the high-pressure pipe 3 are joint-joined with the mating pipes 21 and 31, respectively, the low-pressure pipe 2 and the mating pipe 21 are fixed to the vehicle body by the fixing brackets 2a and 2b, respectively.
[0028]
Next, the hood ridge cover 6 is fastened and fixed to the vehicle body side by a plurality of bolt holes 61 formed on the outer peripheral edge thereof, so that the lower surface thereof is the upper side of the cowl top front panel 1 as shown in FIG. The upper end opening side of the substantially U-shaped notch is in contact with the edge and closed.
[0029]
A foamed rubber which is a flexible elastic member in the inner U-shape 42 of the substantially U-shaped notch 11 due to the tightening pressing force when the upper end opening side of the substantially U-shaped notch 11 is closed by the hood ridge cover 6. When the protector 5 is compressed and deformed, the gap between the small through hole formed by the grommet 4 and the hood ridge cover 6 and the low-pressure pipe 2 and the high-pressure pipe 3 is completely filled.
[0030]
In the embodiment of the present invention, as described above, the grommet 4 is attached to the substantially U-shaped notch 11 of the cowl top front panel 1 before the low-pressure pipe 2 and the high-pressure pipe 3 and the protector 5 is also provided. Since the structure is attached to the low pressure pipe 2 in advance, the grommet cannot be attached to the low pressure pipe 2 and / or the high pressure pipe 3 at a position away from the cowl top front panel 1 in which the U-shaped notch 11 is formed. Even in such a pipe structure, or when the low-pressure pipe 2 and / or the high-pressure pipe 3 penetrates from a direction inclined with respect to a line perpendicular to the cowl top front panel 1, the cowl top front The effect that the grommet can be assembled to the U-shaped notch 11 of the panel 1 is obtained.
[0031]
Since the protector 5 is made of a foamed rubber material that is a soft elastic material as described above, even if the angle at which the low-pressure pipe 2 is inclined with respect to the line perpendicular to the cowl top front panel 1 changes, The protector 5 can be assembled to the U-shaped notch 11 of the cowl top front panel 1 by deformation of the protector 5, and the small through hole formed by the grommet 4 and the hood ridge cover 6, the low pressure pipe 2, and the high pressure The gap between the pipe 3 and the pipe 3 can be completely filled.
[0032]
Further, since the grommet 4 is made of a natural rubber material having a predetermined elasticity, the sealing performance and the water tightness between the cowl top front panel 1 and the grommet 4 are enhanced, thereby improving the sound insulation and water tightness. Can be improved.
[0033]
Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments.
For example, in the embodiment of the invention, the piping grommet structure of the present invention penetrates the cowl top front panel 1 that divides a pipe for circulating and circulating a refrigerant in an air conditioner of a vehicle between the engine room and the vehicle compartment side. Although the example applied to the part which closes the through-hole for piping is shown, the side of the panel in which the substantially U-shaped notch part formed in the side edge part of the panel and this substantially U-shaped notch part were formed All of the cases where a through hole is formed with a closing member that contacts the edge and closes the opening side of the substantially U-shaped notch, and the gap between the pipe inserted into the through hole and the through hole is filled with grommet Can be applied to.
[0034]
In the embodiments of the invention have to form a grayed grommet 4 with elastic rubber having elasticity, it may be formed of a hard resin or the like.
[0035]
In the embodiment of the present invention, the protector 5 is formed in a cylindrical body by using a foamed rubber material that is a flexible elastic member. However, the protector 5 is formed in a cross-sectional cutout circular shape with a part of the cylindrical body cut out. If configured in this way, the protector 5 can be mounted from the side of the low-pressure pipe 2 by opening the notch, so that it can be mounted at any stage without being restricted by the assembly order. As a result, the assembling work can be simplified.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a main part of a vehicle to which a piping grommet structure according to an embodiment of the invention is applied.
2 is a perspective view of an assembled state showing the main part of a vehicle to which the piping grommet structure of the embodiment of the invention is applied. FIG. 3 is a longitudinal sectional view taken along line III-III in FIG.
FIG. 4 is a perspective view showing an assembly process of the piping grommet structure according to the embodiment of the invention ((A) is a grommet attached state, (B) is a high pressure pipe attached state, and (C) is a protector and a low pressure pipe attached state). is there.
FIG. 5 is an exploded perspective view showing a conventional piping grommet structure.
[Explanation of symbols]
1 Cowl top front panel (panel)
11 U-shaped notch 2 Low pressure pipe (pipe)
2a Fixing bracket 2b Fixing fixture 21 Mating pipe 3 High-pressure pipe (small pipe)
31 Mating pipe 4 Grommet (Panel side grommet)
41 Fitting groove 42 Inside U-shape 43 groove 5 protector (pipe side grommet)
6 Hood Ridge cover (blocking member)
61 Bolt hole 62 Lid 7a Low pressure pipe side charge valve 7b High pressure pipe side charge valve 8 Dash panel 9 Strut tower 9a Clearance

Claims (3)

A substantially U-shaped notch formed on the side edge of the panel and a block that closes the opening side of the substantially U-shaped notch by contacting the side edge of the panel where the substantially U-shaped notch is formed In a piping grommet structure in which a through hole is formed with a member, and a gap between the pipe inserted into the through hole and the through hole is filled with a grommet,
A fitting groove in which the grommet is formed in a substantially U shape along a substantially U-shaped notch edge portion of the substantially U-shaped notch portion, and is fitted to the substantially U-shaped notch edge portion on an outer peripheral surface thereof. A panel side grommet formed with a pipe side grommet made of a flexible elastic member wound around the outer periphery of the pipe,
A groove having a substantially U-shaped cross section into which a small pipe different from the pipe can be inserted is formed on the inner U-shaped inner peripheral surface of the panel side grommet,
By compressing and deforming the pipe-side grommet in the inner U-shape of the substantially U-shaped notch with a pressing force when closing the opening side of the substantially U-shaped notch with the closing member, A piping grommet structure configured to fill a gap between a small through hole formed by the closing member and the pipe. The piping grommet structure according to claim 1, wherein the panel-side grommet is made of an elastic member . The pipe grommet structure according to claim 1 or 2, wherein the pipe side grommet is formed in a cross-sectional cutout circular shape with a part thereof cut out .

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