JP2604678Y2 - Grommet - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grommet, and more particularly to a grommet in which a grommet is fastened and fixed using screws.

[0002]

2. Description of the Related Art FIGS. 7 to 9 show a conventional grommet G. FIG.
Has been used to fix the body to the body B. The conventional grommet G is formed of a synthetic resin material, and has a mounting portion 30 for mounting the molding M as an overall configuration,
And a leg 31 for attachment to the body B side. Further, as shown in FIG.
The screw 32 (tapping screw) is loosely screwed in so as to lead to 1, and the screw 32 (tapping screw) is carried in a state where the screw 32 is integrated with the screw 32 in advance.

[0003] The grommet G is first installed on the leg
1 is inserted into the mounting hole of the body B,
Is tightened. As a result, the leg portion 31 is forcibly expanded and deformed, so that the grommet G is fixed in a retaining state. On the other hand, the clip C is attached to the molding M, and the clip C and the grommet are formed by elastically engaging the two claw pieces 33 of the clip C with the corresponding locking edges 34 on the grommet G side. The connection with G is completed, and the assembly of the molding M is completed.

[0004]

However, the above-described grommet G has the following problems. First
There is a point that some of the grommets G transported to the site are missing due to insufficient temporary tightening of the screws 32. This is because the screw 32 protrudes high, so that the screw 32 is likely to collide while being carried in. Conversely, if the screw 32 is tightened deeply to avoid this, the leg 31 will be in an expanded state. In some cases, insertion into the mounting hole of the body is not possible. For this reason, even if it is a slight collision, it will fall off relatively easily.

[0005] The second problem is that the screw 32 may be screwed obliquely when the screw 32 is temporarily tightened, and as a result, the screw 32 may be attached in an inclined posture. On the other hand, regular fixing is not performed, for example, such that the body B enters the body diagonally, and a sufficient engaging force with respect to the body B cannot be obtained.

The present invention has been devised in view of the above problems, and an object of the present invention is to provide a grommet which prevents screws from falling off and realizes a good engagement state.

[0007]

According to a first aspect of the present invention, there is provided a screw housing which has a through hole, is capable of mounting a molding, and is provided coaxially with the through hole. A mounting portion having a mounting portion, and a mounting hole formed on the surface opposite to the screw housing portion so as to surround the through hole, and formed to be capable of bending deformation in a leg-opening direction and drilled on the body side. A leg which can be temporarily fitted to the screw, and a screw which is accommodated in the screw accommodating portion and which can be permanently fixed to the body by a leg opening operation of the leg when screwed into the leg through the through hole; Wherein the inner wall surface of the screw housing portion serves as a guide surface for guiding the screwing operation of the screw, and a lightening is formed in the axial direction from the open end of the screw housing portion. And the screw The peripheral edge of the through-holes in the Description section is characterized in that the collapsible sealing edge is protruded by the head of the screw.

[0008]

According to the above construction, when the grommet is carried into the site, the screw means is surrounded by the screw housing, and the screw means do not directly collide with each other during the carry-in operation. Is done. In addition, when the screw is screwed in after the legs are temporarily fitted into the mounting holes of the body, the screwing operation is guided by the guide surface, so that the screws are screwed in the upright posture and the legs are expanded in the normal state. Open. Therefore, a good engagement state with the body is obtained.

[0009]

[Effects of the Invention] The effects of the present invention are as follows. Since the screw means is surrounded by the screw accommodating portion, falling off of the screw means can be effectively regulated. In addition, since the screwing operation is guided, screwing in an upright posture is possible, and a proper engagement state can be obtained.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; 1 to 4 show a first embodiment of the present invention. The grommet G1 of this example is for mounting a pillar molding M of an automobile, and is integrally formed of a synthetic resin material. As a schematic configuration,
A mounting portion 1 is provided on the upper side for engaging a clip C described later, and a leg portion 3 is provided on the lower side and can be engaged in a mounting hole 2 formed in the body panel B.

The mounting portion 1 has a disk-shaped flange piece 4.
A through hole 6 through which a screw 5 (tapping screw) is passed is formed at the center thereof. A sealing edge 7 is formed at the periphery of the through hole 6 so as to protrude therefrom, and can be crushed by a screw head 5a at the time of screwing. This seals between the screw head 5a and the flange piece 4. On the upper surface of the flange piece 4, a screw housing portion 8 for covering the side of the screw 5 is provided upright. The screw accommodating portion 8 is formed in a substantially cylindrical shape that opens upward, and its height is such that the screw 5 is slightly screwed into the through hole 6 (without expanding the leg portion 3 and easily falling off). The screw head 5 a is set so as to be substantially flush with the upper edge of the screw housing 8. In other words, if the screwing depth is set based on the upper edge of the screw housing portion 8, it is possible to avoid a situation in which the leg portion 3 is excessively expanded.

A side wall surface of the screw accommodating portion 8 is formed with a U-shaped hollow 9 at an opposing position. Further, the side wall surface of a portion orthogonal to this is chamfered 10 in a planar shape, and a locking edge 12 that can be engaged with the locking claw 11 of the clip C is formed on the upper edge portion. On the other hand, a guide surface 13 having an arc-shaped cross section is formed along the height direction on the inner wall surface of the screw housing portion 8 except for the lightened portion,
During the screwing, the operation is guided with a small gap between the screw head 5a.

The leg 3 comprises a pair of leg pieces 3a opposed to each other with the through hole 6 interposed therebetween. When the screw 5 is temporarily fixed (the state shown in FIGS. 1 and 2), the entire leg 3 is in a closed state in which it can be loosely inserted into the mounting hole 2 of the body B, but the screwing is completed ( In the state shown in FIG. 3), it is forcibly expanded to prevent the attachment hole 2 from coming off.

Reference numeral 14 denotes a seal rubber, which is fitted to the leg 3 on the lower surface side of the flange piece 4. Reference numeral 15 denotes a side window glass.

On the other hand, a known clip C is mounted on the molding M side, and can be engaged with the grommet G1. The clip C is made of a synthetic resin material, has first and second engaging portions 16 and 17 that can be engaged with the first and second flange edges f1 and f2 of the molding M, respectively, and further bends. A pair of deformable claw pieces 18 are formed so as to hang down, and are flexibly deformable claw pieces 1 engaged with the lower surface of the window glass G.
8 is formed in a bridge shape.

Next, the operation and effect of the first embodiment configured as described above will be specifically described. As shown in FIG. 1, the grommet G1 is carried into the site with the screw 5 temporarily fixed. However, since the entire screw 5 is almost entirely covered by the screw accommodating portion 8, there is no direct collision with the screw of another grommet G1 during the transportation. Therefore, the screw 5 itself is only slightly screwed into the through hole 6, but the situation of dropping is effectively eliminated.

At the site, the leg 3 of the grommet G1 is first inserted into the mounting hole 2. In this case, since the screw 5 is only slightly screwed into the through hole 6, the two leg pieces 3a are in a closed state without expanding, so that the leg 3 is attached to the mounting hole of the body panel B. Insert smoothly into 2. When the screw 5 is tightened after this insertion, the screwing operation is guided along the guide surface 13 of the screw housing 8 during this time.
Is screwed almost vertically along the axis of the grommet G1. Therefore, the screw 5 is correctly split between the two leg pieces 3a and deforms both the leg pieces 3a in the expanding direction.
As a result of this expanding deformation, the outer surfaces of the two leg pieces 3a
The grommet G1 is prevented from falling off the body panel B. When the head 5a of the screw 5 reaches the flange piece 4, the seal rim 7 is crushed along the entire circumference. As a result, sealing to the body panel B is achieved by the sealing rubber 14 and the crushed sealing edge 7, respectively.

Next, while the molding M to which the clip C is attached in advance is moved along the body panel B, the both locking claws 11 of the clip C are engaged with the corresponding locking portions 16 and 17, so that the clip C The grommet G and the grommet G are connected, and the work of fixing the molding M to the body panel B is completed.

In this embodiment, the clip C is mounted on the molding M side, and the grommet G1 is engaged with the clip C. However, the clip C is abolished and the engagement with the molding M side is performed directly. It is also possible. Although not shown, for example, a method of extending the core metal of the molding M from both flange edges and hanging down a connecting piece corresponding to both locking claws of the clip C is conceivable.

FIGS. 5 and 6 show a second embodiment of the present invention. In the grommet G2 of the second embodiment, the screw 5 is held in a temporarily fixed state without screwing. That is, a part of the outer wall of the screw accommodation portion 8 has U
A U-shaped groove 19 is formed to allow the screw housing 8 to bend and deform in the expanding direction. Then, the screw 5 can be pushed into the screw accommodation portion 8 and the accommodated screw 5 is held with elastic force. The height of the screw housing 8 is such that the lower end of the screw 5 is in contact with the sealing edge 7 (the state in which the screw 5 is not screwed into the through hole 6 at all).
The height is set so that the screw head 5a is immersed. Further, a pair of retaining ridges 20 project from the upper opening edge of the screw housing portion 8 and engage with the screw head 5a to play a role of preventing the screw 5 from being removed. Further, a guide surface 13 for guiding a screwing operation is formed on the inner wall surface of the screw housing portion 8.

The second embodiment is configured as described above. Therefore, similarly to the first embodiment, in the temporarily fixed state, the screw 5 is surrounded by the screw accommodating portion 8, so that the screw 5 can be prevented from falling off during the transportation. Further, since the holding of the screw 5 is simply performed by the elastic force of the screw housing portion 8, that is, the screw is not screwed into the leg 3 at all, the leg is already expanded in the temporarily fixed state. The situation can be reliably avoided. Further, since the screwing operation is guided by the guide surface 13, the screw 5 is prevented from entering obliquely, and a proper engagement state is realized.

The rest of the configuration is the same as that of the first embodiment, so that the same operation and effect can be exhibited.

[Brief description of the drawings]

FIG. 1 is a perspective view of a grommet according to a first embodiment.

FIG. 2 is a sectional view of the same.

FIG. 3 is a sectional view showing a state of attachment to a body.

FIG. 4 is a cross-sectional view showing an attached state of the molding M;

FIG. 5 is a perspective view of a grommet according to a second embodiment.

FIG. 6 is a sectional view of the same.

FIG. 7 is a perspective view of a conventional grommet.

FIG. 8 is a sectional view of the same.

FIG. 9 is a cross-sectional view showing the work of attaching the molding M;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Mounting part 3 ... Leg part 5 ... Screw 8 ... Screw accommodation part 13 ... Guide surface

Claims (1)

(57) [Scope of request for utility model registration] 1. A molding having a through hole and a molding
Screw housing that can be attached and stands upright coaxially with the through hole
On the surface opposite to the screw receiving portion,
And is arranged so as to surround the through hole.
It is formed so that it can be bent and deformed in the leg direction and pierces the body side
Leg which can be temporarily fitted into the set mounting hole, and the screw accommodation
Screwed into the leg side through the through hole
When the legs are opened, the legs are fully stopped by the legs
A grommet comprising:
The inner wall surface of the screw accommodating portion is operated by screwing the screw.
A guide surface for guiding the work, and a screw housing
A lightening is formed in the axial direction from the opening end of the
The periphery of the through hole in the screw receiving portion is
A crushable seal edge is formed by the head
A grommet characterized by that.