JPH04101007U - Fastener - Google Patents

Abstract

(57) [Summary] [Purpose] A grommet member 2 having a cylindrical part 10 with both ends opened by a shaft hole 8, a flange 9 formed at one end thereof, and an axial cut 11 formed from the other end. , the cylindrical part 10 is inserted into the shaft hole 8 from the flange 9 side.
The fastener 1 consisting of the pin member 2 for expanding the other end side outward can be made into a subassembly of the grommet member 2 and the pin member 3 in advance, and can be temporarily fastened to the attached material 14. When doing so, the grommet member 2 is improved so that there is no risk of deformation. [Structure] An inwardly elastically deformable anchor-shaped projection 4 is formed at the tip of the pin member 3, and a slit 12 through which the anchor-shaped projection 4 can pass is formed in the grommet member 2. [Effects] There is no inconvenience that even the grommet member 2 is deformed due to temporary fixing, and the anchor-shaped protrusion 4 portion serving as a temporary fixing function pushes the pin member 3 into the base material 16.
Since it is rather spaced apart from the surface, the applicable plate thickness range can be widened.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a fastener for fixing multiple plate-like materials to each other when stacked together. It is related to

0002

[Conventional technology]

For example, when attaching a mudguard to the body of a car, Synthetic resin rivet-like fasteners are used when stacking several plate materials and fixing them to each other. may be used. Such a fastener may have one end that can expand outward. A grommet member having a cylindrical part that is inserted into the center hole of the cylindrical part and one end of the cylindrical part. It is known that it consists of a pin member for expanding the sides (Utility Model Application No. 64-4). (See Publication No. 5020).

0003 By the way, if the car body side is used as the base material and the mudguard side is used as the attached material, the work will be difficult. From the viewpoint of performance, it is preferable to temporarily fasten the fasteners to the material to be attached in advance, and the above The publication discloses a structure in which a locking protrusion for temporary fastening is provided on the outer peripheral surface of the grommet member. It is.

0004

[Problem that the idea aims to solve]

According to this, a state in which the grommet member and the pin member are sub-assembled in advance When you try to temporarily fasten the fastener to the material to which it is attached, the pin part may not fit into the hole of the material to which it is attached. Since the grommet member must be pushed in by holding the material side, it may not be pushed by the pin member. There is a risk that the grommet member may open before being attached to the base material. Mounted Temporarily fasten only the grommet member to the material, insert it into the hole in the base material, and then insert the pin. If you insert the parts, this problem will not occur, but on the other hand, if the grommet It becomes necessary to manage the cut and pin parts separately, making parts management complicated. This will cause inconvenience.

[0005] The present invention was devised in order to eliminate such disadvantages of the conventional technology. , its main purpose is to pre-assemble the grommet member and pin member into a subassembly. , and there is no risk of the grommet member deforming when temporarily fastening it to the material to be attached. The object of the present invention is to provide an improved fastener that prevents damage.

[0006]

[Means to solve the problem]

According to the present invention, such a purpose is achieved by providing a cylindrical portion with both ends opened by a shaft hole; A flange formed at one end and an axial cut formed at the other end. A grommet member having a In a fastener consisting of a pin member that expands outward, elastic deformation occurs inward. A shapeable anchor-shaped projection is formed at the tip of the pin member, and a slit is formed through which the anchor-shaped projection can pass. This is achieved by forming a grommet member.

[0007]

[Effect]

According to such a configuration, the anchor-shaped protrusion at the tip of the pin member is aligned with the axis of the grommet member. When inserted into the hole, an anchor-shaped protrusion projects from the other end of the cylindrical portion of the grommet member. child When the fastener is inserted into the hole in the material to which it is attached, the anchor-shaped protrusion will elastically deform inward. and pass through the hole. After passing through the hole, the anchor-shaped protrusion is restored and the temporary fastening of the fastener is completed. It will be done.

[0008]

【Example】

The configuration of the present invention will be explained in detail below based on specific embodiments shown in the attached drawings. explain.

[0009] FIG. 1 shows an example of a fastener constructed according to the present invention. This fastener 1 is used, for example, when overlapping and fixing mudguards etc. to the body of a car. It is a material that creates a bond between a base material such as a car body and an attached material such as a mudguard. A grommet member 2 for direct action and a grommet member with its end expanded. 2 from the base material.

0010 The pin member 3 is an anchor-shaped protrusion that protrudes diagonally outward and is elastically deformable inward. 4 is formed on one end thereof, and a circular flange 5 is formed on the other end. It has a section 6. This shaft portion 6 has a cross-shaped portion 6a from the middle portion to the protrusion side. The part 6b from the middle part to the flange side has a perfect circular cross section and is enlarged. diameter. A circumferential groove 7 is formed at the end of the perfect circular portion 6b.

[0011] The grommet member 2 is formed with a shaft hole 8 penetrating in the axial direction, and has one end thereof. It has a cylindrical part 10 on which a circular flange 9 is formed. In this cylindrical part 10 , the axial cut 11 is formed in a cross shape, but one cut is cylindrical. It is formed from the other end of the section 10 to the base of the flange 9, and the other slit is formed from the other end of the flange 9. The radially extending portion of the flange 9 extends through the flange 9. It forms a slit 12 for passing through. On the other hand, this shaft hole 8 is shown in FIGS. 2 and 3. As shown in FIG. It forms a cross shape, and extends from the middle part to the opening on the flange side. The portion 8b is a perfect circle that can relatively tightly receive the perfect circular portion 6b in the shaft portion of the pin 3. It forms an outline. And the inner periphery of the flange side opening in the perfect circular hole portion 8b of the shaft hole. A circumferential protrusion 13 is formed on the surface.

0012 Next, the installation procedure of the above embodiment will be explained. First, align the anchor-shaped protrusion 4 with the slit 12 formed by penetrating the flange 9. , the shaft portion 6 of the pin 3 is inserted into the shaft hole 8 of the grommet member 2 from the flange 9 side. vinegar Then, the protrusion 13 on the inner circumference of the perfect circular hole portion 8b in the shaft hole of the grommet member 2 is connected to the pin member 3. The grommet member 2 and The combined state with the pin member 3 will be maintained. Here, both anchor-shaped protrusions 4 If the dimension between the outer ends in the free state is set somewhat larger than the total length of the slit 12, When the two are connected, the anchor-shaped protrusion 4 deforms inward, so the slit 12 is shaped like an anchor. The protrusion 4 can easily pass through, but when trying to separate the two, the grommet member 2 Since the anchor-shaped protrusion 4 gets caught on the flange 9, it cannot be easily removed.

[0013] In this state, the grommet member 2 and pin member 3 are sub-assembled. The fastener 1 in this state is inserted into the hole 15 of the material to be attached 14 . At this time, the anchor-shaped protrusion 4 It elastically deforms inward and passes through the hole 15 (in a manner similar to that shown in FIG. 4). stop When the anchor-shaped projection 4 passes through the hole 15, it returns to its original shape, that is, the anchor-shaped projection 4 returns to its original shape. 4 expands and the fastener 1 cannot be removed from the hole 15. At this time, the flange of pin member 3 Push the screw 5 and insert the fastener 1 into the hole 15, but do not apply any force to the grommet member 2 side. Since this work can be performed without adding any There is no such thing.

[0014] Next, the material to be attached 14 with the fastener 1 temporarily fastened is inserted into the hole 17 of the base material 16. Align the fasteners 1, overlap them, and forcefully push in the pin member 3. Then the pin The perfect circular portion 6b in the shaft portion of the member 3 is the same as the circular portion 6b in the cylindrical portion 10 of the grommet member 2. The hole portion 8a is pushed and expanded, and the free end of the cylindrical portion 10 is expanded (see FIG. 5). This is it Thus, mutual fixation of the attached material 14 and the base material 16 via the fastener 1 is achieved. If the pin member 3 is pushed all the way in here, the perfect circular part 6b on the shaft of the pin member 3 will be The edge 18 of the boundary between different diameters in the shaft hole of the cylindrical part 10 engages with the circumferential groove 7, and the groove The removal force between the met member 2 and the pin member 3 will further increase.

[0015]

[Effect of the idea]

As described above, according to the present invention, a temporary fastener is attached to the tip of the pin member that passes through the grommet member. The grommet member and pin member are sub-assembled in advance to provide a locking function. No need to apply extra force to the grommet member when temporarily fastening it to the material to be attached. nothing. Therefore, temporary fixing may cause the inconvenience that even the grommet member may be deformed. There is no fault. In addition, the anchor-shaped protrusion that serves as a temporary fixing function can be used to push the pin member into place. Because it is rather spaced from the base material, the applicable plate thickness range can be widened. Ru.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing the entire fastener according to the present invention.

FIG. 2 is a longitudinal cross-sectional view showing a sub-assembled fastener passing through a hole in a base material.

FIG. 3 is a top view of the grommet member.

FIG. 4 is a longitudinal sectional view showing the progress of inserting the fastener into the hole of the base material.

FIG. 5 is a longitudinal cross-sectional view showing the final state of the fasteners.

[Explanation of symbols]

1 Fastener 2 Grommet member 3 Pin member 4 Anchor-shaped protrusion 5 Flange 6 Shaft part 6a Cross-shaped part 6b Perfect circular part 7 Circumferential groove 8 Shaft hole 8a Cross hole part 8b Round hole part 9 Flange 10 Cylindrical part 11 Cutting 12 slit 13 Circumferential protrusion 14 Mounted material 15 holes 16 Base material 17 hole 18 Edge

Claims (1)

[Scope of utility model registration request] 1. A grommet member having a cylindrical portion with both ends opened by a shaft hole, a flange formed at one end of the cylindrical portion, and an axial cut formed from the other end side;
A fastener consisting of a pin member inserted into the shaft hole from the flange side to expand the other end side of the cylindrical part outward, the fastener having an anchor-shaped protrusion that is elastically deformable inward. A fastener characterized in that the grommet member has a slit formed at the tip of the pin member and through which the anchor-shaped protrusion can pass.