JPS6222658Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a grommet, and more particularly to a grommet used when attaching an attachment part to an attached part using a screw member.

[Prior Art] Generally, in automobiles, when a panel or the like is attached to a wall inside a vehicle, a grommet is inserted into a mounting hole provided in the wall as a screw receiver, and the panel is screwed into the grommet. (Utility Model Publication No. 50-18049, Publication No. 54-22839, British Patent No. 936418, etc.).

By the way, dimensional errors occur in the formation positions of the screw holes provided in the panel and the mounting holes for grommet insertion provided in the wall during manufacturing. Further, when the panel is made of resin, the relative position between the panel and the wall may change due to heat shrinkage after manufacture or changes over time. Therefore, the mounting hole provided in the wall for inserting the grommet is made into a long hole so that the grommet can be slid in the longitudinal direction of the mounting hole during and after mounting the mounting component.

In this case, when inserting the grommet into the mounting hole, the grommet is positioned at the center in the longitudinal direction of the mounting hole, and this position is used as a reference position, and the grommet is slid if necessary.

However, there was a problem in that it was not easy to position the grommet in the longitudinal center of the mounting hole, resulting in poor workability.

[Problems to be solved by the invention] In view of the above, the present invention is designed to be able to slide into a long mounting hole provided in a part to be mounted such as a wall, and which requires special positioning operation when inserted into the mounting hole. It is an object of the present invention to provide a grommet that can be positioned at a predetermined position in the longitudinal direction of a mounting hole without being accompanied by.

[Means for Solving the Problems] The present invention consists of a seat portion whose front surface is in contact with the mounting part and whose back surface is in contact with the attached part, a body portion that extends downward from the seat portion, and a body portion that extends from the body portion. A pair of locking portions that are elastically pressed into contact with the longitudinal orthogonal wall of the mounting hole of the elongated hole formed in the mounting portion and latched to the back surface of the mounting portion, and a seat portion and a body portion. a hole that is formed in communication with each other to receive a screw member, and a mounting hole that protrudes from the body in a direction perpendicular to the direction in which the locking portion is provided when viewed from the direction in which the screw member is screwed into the hole. A grommet is provided with a pair of positioning arms elastically pressed into contact with the longitudinal direction hole wall, and is capable of sliding in the longitudinal direction of the mounting hole, wherein the elastic force of the positioning arms is The body is sized to be able to slide in the longitudinal direction of the attachment hole against the pressing force of the locking portion.

[Function] In the present invention having the above configuration, the grommet inserted into the mounting hole is moved and positioned at a predetermined position in the mounting hole by the elastic force of the positioning arm.

After the mounting part is attached via the screw member, when a force is applied that changes the relative position of the mounting part and the attached part in the longitudinal direction of the mounting hole, the grommet elastically deforms the positioning arm and closes the mounting hole. is slid in the longitudinal direction.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing a grommet according to this embodiment. A grommet 10 has a seat portion 12, a body portion 14, a locking portion 16, and a positioning arm portion 18 integrally formed of synthetic resin. In the center of 12 is the torso 1.
A hole 20 is formed that communicates with and penetrates the hole 4 .

The seat portion 12 has a substantially H-shaped flat plate shape, and the mounting parts 26
is brought into contact with the surface. The reason why the four corners of the seat part 12 protrude outward is to prevent the grommet 10 from being buried in the long mounting hole 24 formed in the wall 25, which is the part to be mounted. The body portion 14 constitutes the main body of the grommet, and since it has a shape that converges slightly downward together with the locking portion 16 (see FIGS. 3 and 4), it can be easily pushed into the attachment hole 24.

The locking portions 16 are provided on both sides of the body portion 14,
It expands upward from the lower end of the body 14.
The distal end of the locking portion 16 is shaped like a step.
A locking surface 16A and a second locking surface 16B are formed. The distance between each first locking surface 16A of the pair of locking portions 16 is slightly larger than the width of the mounting hole 24 (in the longitudinal orthogonal direction). Since the locking portion 16 has elasticity, when the grommet 10 is inserted into the mounting hole 24, it elastically presses against the hole wall in the longitudinal direction of the mounting hole 24 and plays the role of fixing the grommet 10. However, since this pressing force is not so large, the grommet 10 is inserted into the mounting hole 24 for position adjustment.
It is possible to slide it in the longitudinal direction. Second
The distance between the locking surface 16B and the back surface of the seat portion 12 is approximately equal to the thickness of the mounting component 26.

As can be seen from FIG. 4, the positioning arm portions 18 are provided in a pair in a direction perpendicular to the direction in which the locking portion 16 is provided when viewed from the axial direction of the hole portion 20, and are similar to the locking portion 16. It has a shape that curves and protrudes from the lower end of the body 14 and expands upward. Therefore, the pair of positioning arms 18 can be elastically deformed in the directions toward and away from each other. Each positioning arm 18
The interval between them is larger than the length (longitudinal direction) of the mounting hole 24, and when inserted into the mounting hole 24, the outer surface is elastically pressed against the longitudinal hole wall of the mounting hole 24. Become. Further, a flange portion 22 having an enlarged width is formed at the tip of the positioning arm portion 18, and this portion abuts against the surface of the peripheral wall 25 of the mounting hole 24 to prevent the entire grommet 10 from being buried. In this embodiment, the shapes of the pair of positioning arms 18, 18 are symmetrical, and their elastic forces are equal. This elastic force is larger than the frictional force generated when the locking portion 16 comes into elastic pressure contact with the hole wall of the mounting hole 24. Further, in this embodiment, the thickness and width of the flange portion 22 are formed to be the same as those of the seat portion 12, so that the flange portion 22 can be brought into close contact with the back surface of the mounting component 26.

The order of use of the grommet 10 of this embodiment is as follows. First, the grommet 10 is set so that the positioning arms 18, 18 are pressed against the walls of both holes in the longitudinal direction of the mounting hole 24, and the seat 12 and both flanges 22, 22 are attached to the periphery of the mounting hole 24. wall 2
Push the body part 14 until it touches the surface of 5. At this time, the pair of locking parts 16 are brought into contact with the corners of the mounting holes 24 on the surface of the wall 25 and are elastically deformed in the direction of approaching each other, and the back surface of the seat part 12 is brought into contact with the surface of the wall 25. At the same time, the shape is restored close to its original shape. In this state, the locking surface 16A is pressed against the hole wall in the longitudinal direction orthogonal to the mounting hole 24, and the locking surface 16B
is in contact with the back surface of the wall 25 at the periphery of the mounting hole 24.

Further, no matter where the grommet 10 is pushed in from any position in the longitudinal direction of the mounting hole 24, the pair of positioning arms 18, 18 tends to abut against the longitudinal wall of the mounting hole 24 with the same pressing force. As a result, the mounting hole 24 is automatically located at the center in the longitudinal direction.

Next, attach the mounting part 26 to the seat part 1 of the grommet 10.
2, and align the threaded hole 26A of the mounting part 26 with the hole 20 of the grommet 10. The hole 20 of the grommet 10 is located at the center of the mounting hole 24, and the screw hole 26A usually does not deviate significantly from this position. Therefore,
Even if there is a slight deviation in the relative position of the two, the tapping screw 2 inserted through the screw hole 26A
Once the tip of the grommet 8 is inserted into the hole 20, as the tapping screw 28 is screwed in, the main body of the grommet 10 is moved to a position where the hole 20 faces the screw hole 26A ( (See arrow in Figure 4).

The tapping screw 28 is screwed inward while forming a thread groove in the hole wall of the hole 20, and the head (countersunk head in this embodiment) is brought into contact with the mounting part 26.
Fasten the fitting 26 to the grommet 10. As a result, the mounting part 26 is attached to the tapping screw 2.
8 and grommets 10 to the wall 25.

Further, after the attachment part 26 is attached as described above, if the attachment part 26 shrinks or changes its shape, for example, the main body of the grommet 10 will follow the change in the position of the screw hole 26A. It will not move and cause problems such as damaging the mounting parts 26 and the wall 25.

If the main body of the grommet 10 is moved significantly from the longitudinal center of the attachment hole 24, one of the positioning arms 18 may become separated from the longitudinal hole wall of the attachment hole 24. In the grommet 10 of this embodiment, even in such a case, the flange portion 22 will not fall into the mounting hole 24, so the tip of the positioning arm portion 18 will not play.

In addition, in this embodiment, a pair of positioning arm parts 1
8 has a symmetrical shape, and the main body of the body 14 is connected to the mounting hole 2.
4. Automatic alignment is made to the center in the longitudinal direction of 4. However, the present invention is not limited to this, and it is also possible to implement an embodiment in which the pair of positioning arms 18 are made into an asymmetrical shape so that the body 14 is automatically aligned at an arbitrary position in the longitudinal direction intermediate portion of the mounting hole 24. It is.

Further, in this embodiment, the locking part 16 is extended from the body part 14 and is separated from the body part 14 except for the base part, but a non-return protrusion is raised directly from the body part 14 and the material is It may also be inserted and locked using elasticity.

[Effects of the invention] As described above, according to the grommet of the present invention, the hole is automatically centered with respect to the elongated mounting hole at the time of setting, and the connection between the mounting part and the mounted part is improved. It has the effect of being able to move freely following changes in relative position.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the grommet according to the present invention, FIG. 2 is a plan view, FIG. 3 is a front view with one side cut vertically, and FIG. 4 is a side view showing the grommet in use. 10...grommet, 12...seat, 14...
Body part, 16...Locking part, 18...Positioning arm part, 20...Hole part, 22...Flange part, 24...
...Mounting hole, 25...Wall (mounted part), 26...Mounting parts.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A seat portion whose front surface is in contact with the attachment part and whose back surface is in contact with the attached part, a body extending downward from the seat, and an attached part extending from the body. The seat portion and the body portion are connected to a pair of locking portions that are elastically pressed into contact with the hole wall in the direction perpendicular to the longitudinal direction of the mounting hole of the elongated hole formed in the hole and are locked to the back surface of the attached portion. a hole formed to receive a screw member, and a longitudinal direction of a mounting hole that protrudes from the body in a direction perpendicular to the direction in which the locking part is provided when viewed from the direction in which the screw member is screwed into the hole. The grommet is provided with a pair of positioning arms elastically pressed into contact with the hole wall and is slidable in the longitudinal direction of the mounting hole, and the elastic force of the positioning arms is applied to the locking part. A grommet having a size that allows the body portion to slide in the longitudinal direction of the attachment hole against the pressing force of the grommet. (2) Utility model registration claim (1), characterized in that a flange portion is provided at the tip of the pair of positioning arm portions to come out of the mounting hole and come into contact with the surface of the mounted portion. Grommet as described.