KR101751693B1 - Grommet assembling structure for automobile - Google Patents

Grommet assembling structure for automobile Download PDF

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Publication number
KR101751693B1
KR101751693B1 KR1020150149293A KR20150149293A KR101751693B1 KR 101751693 B1 KR101751693 B1 KR 101751693B1 KR 1020150149293 A KR1020150149293 A KR 1020150149293A KR 20150149293 A KR20150149293 A KR 20150149293A KR 101751693 B1 KR101751693 B1 KR 101751693B1
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KR
South Korea
Prior art keywords
grommet
fixing
screw
fixing member
base portion
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Application number
KR1020150149293A
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Korean (ko)
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KR20170048778A (en
Inventor
박범근
최원준
Original Assignee
주식회사 프라코
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Priority to KR1020150149293A priority Critical patent/KR101751693B1/en
Publication of KR20170048778A publication Critical patent/KR20170048778A/en
Application granted granted Critical
Publication of KR101751693B1 publication Critical patent/KR101751693B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J5/00—Doors
    • B60J5/04—Doors arranged at the vehicle sides
    • B60J5/0468—Fixation or mounting means specific for door components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/48—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects combined with, or convertible into, other devices or objects, e.g. bumpers combined with road brushes, bumpers convertible into beds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
    • F16B21/06—Releasable fastening devices with snap-action
    • F16B21/07—Releasable fastening devices with snap-action in which the socket has a resilient part
    • F16B21/073—Releasable fastening devices with snap-action in which the socket has a resilient part the socket having a resilient part on its inside

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Connection Of Plates (AREA)
  • Dowels (AREA)

Abstract

The present invention relates to a grommet for an automobile which is capable of enhancing the assemblability and the clamping force of the grommet when the two members are fastened by using the grommet and also capable of enhancing the mold durability of the member in which the grommet is assembled, To provide a grommet assembly structure.
To this end, the present invention is characterized in that a slope is applied to the bottom of the grommet, a thickness of the grommet screw fastening part is increased, and a fixing hook is provided for preventing the grommet from coming off. In the first fastening member, And an inclined surface corresponding to the inclined surface applied to the grommet bottom portion is provided on the seating surface of the grommet base portion.

Description

Technical Field [0001] The present invention relates to a grommet assembling structure for automobile,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grommet assembling structure for a vehicle, and more particularly, to a grommet assembling structure for a vehicle, The present invention relates to a technique for enhancing mold durability of a mold.

Generally, a grommet is an assembled part which is fixed and fastened by screws to fix a plurality of fixing members to each other in an automobile or the like, and is made of a material such as metal, plastic or the like.

FIG. 1 is a perspective view showing a state before assembly of a grommet 3a, FIG. 2 is a front view after assembly of a grommet 3a, FIG. to be.

The assembly structure of the conventional grommet 3a will be described. First, the grommet 3a is assembled to the fixing means provided on the first fixing member 1, such as a side bracket.

At this time, the fixing means includes a fixed wall portion 11 (hereinafter referred to as a 'fixed wall portion') formed in a right-and-left direction on the first fixing member 1, A platform 15 formed for supporting the grommet 3a and forming an insertion groove together with the fixing wall 11 and a stopping protrusion 17 formed at the front of the platform 15 to prevent the grommet 3a from separating from the platform 15. [ ).

On the platform 15 of the first fixing member 1, a screw through hole (not shown) for fastening the screw 4 to the grommet 3a is formed so as to pass through the upper and lower portions.

In the lower part of the grommet 3a, a fastening plate 21 having a screw fastening hole is formed. On the upper surface of the fastening plate 21, a fitting piece 33 Is protruded upward.

The engaging pieces 33 are spaced apart from each other and protrude upward so that they have a slight elasticity in the left and right direction and a stepped portion is formed on the outer side of the engaging piece 33 to serve as a latching jaw.

In the conventional structure constructed as described above, it is assembled in the following process.

First the engaging plate 21 of the grommet 3a is fitted into the insertion space between the fixing wall portions 11 provided on the first fixing member 1 and then the engaging plate 21 of the grommet 3a (Not shown) which is to be fastened to the first fastening member 1 with a fastening piece 33 formed laterally opposed to the upper side.

In this state, the screw 4 is passed through the screw through hole of the first fixing member 1 to be fastened to the holding plate 21 on which the screw fastening hole of the grommet 3a is formed, thereby completing the assembly.

However, the conventional method of assembling as described above has the following problems.

In the prior art, a separate assembling machine has to be used in the process of assembling the grommet 3a to the first fixing member 1, thereby making it difficult to perform the fastening operation.

Specifically, conventionally, in order for the engagement plate 21 of the grommet 3a to be inserted into the insertion groove of the insertion portion provided in the first fixing member 1, the engagement plate 21 is detached from the front side of the platform 15 It is necessary to use a separate tool or machine to apply a large force because it can not be inserted by hand because a very large force is required at this time. .

That is, when the latching jaw 17 is low, the grommet 3a can easily be separated from the grommet 3a. Therefore, the grommet 3a can be prevented from being separated by increasing the latching jaw 17, Resulting in deterioration of the assemblability of the battery.

On the contrary, when the height of the stopper 17 is reduced to improve the assemblability of the grommet 3a, the grommet 3a easily disengages.

Meanwhile, in the prior art, the fastening plate 21 of the grommet 3a has a thin structure. On the other hand, a platform 15 having a high height is required to be formed in the first fastening member 1 for forming an insertion groove for fixing the fastening member. It is necessary to form the engaging protrusion 17 in front of the platform 15 and thus the molding structure of the first fixing member 1 is complicated and burrs occur periodically, .

In addition, since the thickness of the engaging plate 21 of the grommet 3a is too thin in the prior art, the thread is not formed sufficiently on the screw fastening hole formed through the fastening plate 21 to sufficiently receive the force Accordingly, when a slightly larger force (i.e., over-torque) is applied in the screw 4 fastening process, there is a problem that the screw 4 is loosened and the assemblability is deteriorated.

That is, in the prior art, as the thickness of the fastening plate 21 is made thinner in order to fit the fastening plate 21 into the insertion groove of the insertion portion provided in the first fixing member 1, There is a problem that the screw 4 is not caught even when an excessive force is applied to the screw 4 at the time of tightening the screw 4 and the screw 4 is idle.

Korean Patent No. 10-0562578 (Mar. 13, 2006)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a grommet which can assemble and fix a grommet with a grommet, It is an object of the present invention to provide a grommet assembling structure for a vehicle that can enhance durability.

In order to accomplish the above object, the present invention provides a grommet assembling structure for an automobile in which a first fixing member and a second fixing member are fixed by a grommet and are fastened with a screw,

Shaped fixing wall portions for assembling the grommet are formed on the first fixing member so as to face each other and the grommet is formed at the rear of the grommet base portion seating region between the fixing wall portions, And a hooking piece for hooking the fixing hook of the hook-

A lower portion of the grommet is inserted into an insertion space between left and right fixing wall portions, and a base portion having a screw fastening hole penetrating the upper and lower portions is provided, and on the upper side of the base portion, a fitting piece is provided, And a fixing hook is provided at one side of the fitting member to prevent the grommet from being detached by being fully inserted into the insertion space between the fixing wall portions.

Effects of the grommet assembling structure for a vehicle of the present invention are as follows.

First, according to the present invention, when the two members are fastened together using the grommet, the assemblability of the grommet and the fastening force can be improved.

Second, according to the present invention, it is possible to effectively prevent erroneous assembly and disconnection of the grommet.

Thirdly, according to the present invention, the durability of the mold in which the grommet is assembled can be enhanced.

That is, according to the present invention, it is possible to improve the assemblability and fastening force of the grommet with respect to the fixing members, which are required to be fastened to each other through the grommet such as the side bracket and the rear bumper in the vehicle, to prevent mis- assembly and departure of the grommet, And the durability of the mold of the present invention.

1 and 2 are views showing an assembling structure of a grommet and a side bracket according to the prior art,
1 is a perspective view showing a state before assembling a grommet;
Fig. 2 is a front view after grommet assembly
Figure 3 is a perspective view of the grommet of the present invention.
4 to 7 are views showing an assembling structure of a grommet and a side bracket according to the present invention,
4 is a perspective view showing a state before assembling the grommet
5 is a perspective view showing a state after assembling the grommet
6 is a front view seen from the direction of "
7 is a cross-sectional view taken along line AA in Fig. 6

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS. 4 to 7.

2 to 7, the present invention provides a grommet assembling structure for an automobile in which a first fixing member 1 and a second fixing member 2 are fixed with a grommet 3 and fastened with a screw 4 .

More specifically, the present invention is characterized in that on the first fixing member 1, 'A' shaped fixing wall portions 11 for assembling the grommet 3 are formed on the left and right so as to face each other, The engaging piece 12 is formed at the rear of the grommet seating area between the grommet 3 and the fixing hook 32 of the grommet 3 as the grommet 3 is fully inserted.

The base portion 31 is inserted into the insertion space between the left and right fixing wall portions 11 and has a screw fastening hole 31a penetrating the upper and lower portions. There is provided a fitting piece 33 protruding from the base portion 31 in the vertical direction and spaced apart from each other so as to face each other.

The grommet 3 is inserted into the insertion space between the fixing wall portions 11 at one side of the fitting piece 33 so as to be engaged with the locking piece 12, A hook 32 is provided.
3 to 5, the fixing hook 32 is protruded to the rear of the base 31 at one side of the fitting piece 33, and the fixing hook 32 is formed between the fixing wall 11 When the grommet 3 is completely inserted into the grommet seating area, the fixing hook 32 is hooked on the retaining piece 12.
As shown in Figs. 4 and 7, the fixing hook 32 is formed at the rear of the base portion 31. Fig. The grommet (3) is inserted backward from the front of the grommet seating area and assembled to the first fixing member (1). Therefore, it can be seen that the fixing hook 32 is caught by the engaging piece 12 to prevent the grommet 3 from being displaced forward of the grommet seating area, that is, forward of the fixing wall 11.

The fixing hook 32 is formed in a horizontal direction so as to be orthogonal to the fitting piece 33 formed in the vertical direction and the fixing hook 32 rides over the inclined surface 12a formed at the upper end of the engaging piece 12, And is caught by the latching piece 12.

The grommet 3 is formed such that the bottom surface of the base portion 31 is inclined and correspondingly the grommet seating surface 13 between the left and right fixing wall portions 11 of the first fixing member 1 also faces the base portion 31, (Refer to the inclination angle [alpha] in Fig. 7) corresponding to the inclination of the bottom surface of the bottom plate 31, so that the erroneous assembly is prevented.

A screw through hole 10a for fastening the screw 4 of the grommet 3 is formed on the grommet seating face 13 of the first fixing member 1 so as to pass through the upper and lower portions.

The screw fastening hole 31a provided in the base 31 of the grommet 3 is formed at a deep enough depth to prevent the screw 4 from being frosted at the time of fastening the screw. That is, the thickness of the base portion 31 is formed to have a dimension capable of forming a thread having a sufficient number of turns inside the screw fastening hole 31a. For example, in the conventional grommet fastening plate 21 (see FIG. 1) At least two times the thickness of the substrate.

In short, the present invention applies a sloped surface to the bottom of the grommet 3, the screw fastening portion of the grommet 3 increases the thickness thereof, and has a fixing hook 32 for preventing deviation, The first fixing member 1 fastened with the screw 4 is provided with an engaging piece 12 to which the fixing hook 32 of the grommet 3 is caught and an inclined surface corresponding to the inclined surface applied to the grommet bottom portion, .

The operation of the present invention configured as described above is as follows.

According to the present invention, when assembling the two members using the grommet (3), the assembling property and the fastening force of the grommet (3) can be improved.

When the grommet 3 is fastened between the first fixing member 1 such as a side bracket and the second fixing member 2 such as a rear bumper, The fixing hook 32 provided at one side of the fitting piece 33 of the grommet 3 is inserted into the insertion space between the fixing part 11 of the grommet 3 by pushing the grommet 3 completely into the insertion space, (12a) formed on the upper end of the engaging piece (12) formed behind the grommet seating area of the gripping piece (1) and caught on the holding piece (12).

That is, if the grommet 3 of the present invention is pushed into the insertion space between the 'A' shaped fixed wall portions 11 provided in the first fixing member 1 without applying a large force, The hook 32 is caught by the engaging piece 12 and the primary assembly of the grommet 3 and the first fixing member 1 is completed.

According to the present invention, when the grommet (3) is pushed into the insertion space between the 'A' shaped fixing wall portions (11), the locking jaw (17; Is not present on the front side of the stationary wall portion 11, so that assembly is very easy.

The grommet seating surface 13 between the left and right fixing wall portions 11 of the first fixing member 1 is also inclined to the bottom surface of the base portion 31 When the grommet 3 is formed in an inclined plane, if the grommet 3 is not aligned in the assembling direction, the assembly itself can not be performed.

On the other hand, after the primary assembly of the grommet 3 and the first fixing member 1 is completed, the second fixing member 2 is fitted through the fitting piece 33 of the grommet 3 And the screw 4 is fastened to the screw fastening hole 31a formed in the base portion 31 of the grommet 3 through the screw through hole 10a of the first fixing member 1, So that the fastening force between the two members using the grommet 3 is completed. As shown in Fig.

According to the present invention, since the thickness of the base portion 31 having the screw fastening holes 31a of the grommet 3 is sufficiently thick, the depth of the screw fastening holes 31a is sufficiently deep, A screwdriver having a sufficient number of turns is formed on the inner circumferential surface of the grommet 31a. Therefore, unlike the screw 4 fastened to the conventional grommet 3, the screw 4 is prevented from being scattered.

The present invention can be formed in such a dimension that the thickness of the base portion 31 can be formed into a thread having a sufficient turn inside the screw fastening hole 31a without increasing the height of the fixing wall portion 11, This is because the platform 15 (see FIG. 1) provided in the first fixing member 1 is removed, unlike the conventional one.

Further, according to the present invention, it is possible to simplify the structure of components provided for assembling the grommet 3 on the first fixing member 1 such as a member on which the grommet 3 is assembled, that is, a side bracket or the like, The durability of the mold can be enhanced as the structure of the mold for injection of the first fixing member 1 is simplified.

It will be apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit or scope of the invention as defined in the appended claims. It is obvious to them.

Therefore, the above-described embodiments are to be considered as illustrative rather than restrictive, and thus the present invention is not limited to the above description, but may be modified within the scope of the appended claims and equivalents thereof.

1: first fixing member 11: fixed wall portion
12: engaging piece 12a: inclined surface
13: grommet seating surface 2: second fixing member
3: Grommet 31: Base portion
32: fixed hook 33:
4: Screw

Claims (4)

A grommet assembling structure for an automobile in which a first fixing member and a second fixing member are fixed by a grommet and are fastened by a screw,
Shaped fixing wall portions for assembling the grommet are formed on the first fixing member so as to be opposed to each other on the left and right sides, and the grommet is provided in the rear of the grommet seating region between the fixing wall portions, And a latching piece for catching the fixing hook of the latching member is formed;
A base portion inserted into the grommet seating region between the left and right fixing wall portions at the lower portion of the grommet and having a screw fastening hole penetrating the upper and lower portions thereof; And upper and lower protrusions are provided on the upper portion of the base portion and are spaced apart from each other so as to face each other; The fixing hook is protruded rearward of the base portion so as to be caught by the catching piece as the grommet is fully inserted into the grommet seating region between the fixing wall portions at one side of the fitting piece; Wherein the fixing hook is engaged with the engaging piece to prevent the grommet from being released forward of the grommet seating area. The method according to claim 1,
Wherein the fixing hook is caught by the engaging piece over an inclined surface formed on the upper end of the engaging piece. The method according to claim 1,
A base bottom surface of the grommet is formed obliquely,
Wherein a seating surface of the grommet base portion between the left and right fixing wall portions of the first fixing member is formed as an inclined surface corresponding to the inclination of the base bottom surface to prevent misassembly. The method according to claim 1,
Wherein the screw fastening hole provided in the base portion of the grommet includes:
Wherein the screw is formed at a depth that prevents the occurrence of a loose screw when the screw is tightened.
KR1020150149293A 2015-10-27 2015-10-27 Grommet assembling structure for automobile KR101751693B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150149293A KR101751693B1 (en) 2015-10-27 2015-10-27 Grommet assembling structure for automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150149293A KR101751693B1 (en) 2015-10-27 2015-10-27 Grommet assembling structure for automobile

Publications (2)

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KR20170048778A KR20170048778A (en) 2017-05-10
KR101751693B1 true KR101751693B1 (en) 2017-06-28

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