JPH0443306Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to an edge cover which covers the edges of holes such as burring holes, and more specifically to the provision of an edge cover which is made of synthetic resin and has a freely rising and falling engaging piece which is provided on the edge cover so that the cover can be attached to the edge of the hole from the reverse punch side of the burring hole, etc.

(Prior Art) There are various types of edge covers that cover the edges of holes such as burring holes. Generally, an edge cover as shown in FIG. 8 is used because it is easy to install and also completely covers the edge of the hole.

This edge cover has a flange 10 on one cylindrical edge of a cylindrical part 9 made of synthetic resin, and parallel slits 11 to 11 are provided from the other cylindrical edge toward the flange 10, so that the peripheral wall of the cylindrical part 9 has elasticity. In addition to providing the engaging piece 12, a wedge-shaped engaging convex portion 1 is provided so as to bulge outward on the free end side of the elastic engaging piece 12.
3 is integrally provided, and the collar 1 of this engaging convex portion 13
The 0 side is a flange surface 13a that is parallel to the flange 10, and the surface from this flange surface 13a toward the tip of the engagement projection 13 is an inclined surface 13a that tapers inward.

(Problems to be Solved by the Invention) In such a conventional edge cover, when the engagement protrusion 13 provided on the engagement piece 12 is bulged outward to a large extent and the engagement distance is increased, It becomes difficult to insert the edge cover into the mounting hole, and conversely, if the protrusion of the engagement protrusion 13 is set to a small amount, it becomes easy to insert the edge cover into the mounting hole, but the edge cover does not fit into the edge of the mounting hole. There was an inconvenience that the hook was insufficient and the edge cover fell off the edge of the hole.

In particular, the above-mentioned inconvenience was noticeable when it was necessary to attach the edge cover from the reverse punch side of the mounting hole toward the punch side due to work convenience.

In FIG. 9, the edge cover is installed by fitting the edge cover into the burring hole 14 from the opposite punch side and engaging the convex portion 13 of the engaging piece 12 with the edge of the burring hole 14 on the punch side. However, the engagement area formed by the flange surface 13a of the convex portion 13 cannot be sufficiently effective due to the rounded surface on the punch side of the burring hole 14, and there is the problem that the mounting edge cover may fall off from the burring hole 14. It was hot.

Therefore, if a sufficient engagement allowance is provided for the convex portion 13 of the engaging piece 12 as shown in FIG. Since the engagement piece 12 is required to have a deflection equivalent to the extension width, the insertion force of the edge cover becomes larger than necessary, making installation difficult.

The present invention eliminates the disadvantages of conventional edge covers, and provides an edge cover that can be easily installed in a mounting hole such as a burring hole, and that does not fall off from the edge of the mounting hole after installation. It is something.

(Means for Solving the Problems) For the above purpose, the edge cover according to the present invention provides an edge cover that is most suitable for being installed and used mainly from the reverse punch side of a burring hole, and is made of synthetic resin. A cylindrical portion 1, a flange 2 provided toward the outside of one cylindrical edge 1a of the cylindrical portion 1 in a direction orthogonal to the circumferential wall of the cylindrical portion 1, and the cylindrical portion 1.
A locking piece provided integrally with the cylindrical portion 1 from the side of the cylindrical edge 1a via a hinge portion 5c in the cutout portion 4 provided from the other cylindrical edge 1b side toward the cylindrical edge 1a side. This is an edge cover configured with 5. And the locking piece 5 of this edge cover
is the cutout portion 4 of the cylindrical portion 1 from the inside of the cylindrical portion 1.
A plate portion 5a that can be freely raised and lowered toward
and a locking piece 5b bent at a substantially right angle from the free end side of a toward the cutout 4 side, and the locking piece 5 erected in the cutout 4. The locking piece portion 5b is configured to be substantially parallel to the collar 2 of the cylindrical portion 1.

(Function) Considering the structure described above, the edge cover of the present invention has the following features:
With the flange 2 on the front side, insert the cylindrical part 1 into the flange 2 from the cylindrical edge 1b side of the cylindrical part 1 with respect to the mounting hole such as the burring hole.
It is installed by inserting it until it touches the edge of the mounting hole. When inserting the cylindrical portion 1, the locking piece 5 is kept lying down inside the cylindrical portion 1, and the locking piece 5 is inserted into the cylindrical portion with the collar 2 in contact with the edge of the mounting hole. Stand up toward the missing part 4 of part 1. The locking piece 5b of the locking piece 5 raised toward the notch 4 is approximately parallel to the flange 2 of the cylindrical portion 1, and the edge of the mounting hole is aligned with the flange 2 in the upright position. The edge cover is fixed to the hole edge by being held between the locking pieces 5b.

(Embodiment) A typical embodiment of the edge cover according to the present invention will be described below with reference to the accompanying drawings. A is an edge cover, and for easier understanding, the mounting hole to which the edge cover A is attached will be described as a so-called burring hole B having a cylindrical rising edge.

The edge cover A has a short cylindrical portion 1 made of synthetic resin, and one opening cylindrical edge 1a of this cylindrical portion 1 has a flange 2 extending outwards in a direction perpendicular to the circumferential wall of the cylindrical portion 1. are integrated. Further, on the other side of the cylindrical edge 1b opposite to the cylindrical edge 1a on which the collar 2 is provided, a projecting piece 3 is provided outwardly in a direction orthogonal to the peripheral wall of the cylindrical portion 1. There is.

The protruding piece 3 is produced by making a portion of the collar 2 corresponding to the width of the protruding piece 3 into a cut-out portion 8 for convenience in cutting out the edge cover A.

Also, from the side of the cylinder edge 1b of the cylinder part 1 to the cylinder edge 1a
A notched portion 4 is provided toward the cylindrical portion 1, and a locking piece 5 is integrally connected to the cylindrical portion 1 from the cylindrical edge 1a side of the notched portion 4 via a hinge portion 5c.

The locking piece 5 is movable up and down from the inside of the cylindrical part 1 toward the cutout part 4 by the hinge part 5c, and the locking piece 5 is movable up and down from the inside of the cylindrical part 1 toward the cutout part 4. A plate portion 5a having a shape and size that fits within the cutout portion 4, and a locking piece portion 5b bent at a substantially right angle from the free end side of the plate portion 5a toward the cutout portion 4 side.
It is made up of.

Further, on both sides of the locking piece 5, a convex portion 7 is formed extending between the plate portion 5a and the locking piece portion 5b toward the rising direction of the plate portion 5a, and a convex portion 7 is provided at approximately the center of the thickness of the plate portion 5a. It is set in. A protrusion 6 is provided on the rising side edge of the peripheral wall facing the cutout 4 in which the locking piece 5 is accommodated, and is engaged with the protrusion 7 described above.

These convex portions 6 and 7 are such that when the locking piece 5 is pulled up and housed in the cutout 4 of the cylindrical portion 1, the plate portion 5a of the locking piece 5 and the surface of the peripheral wall of the cylindrical portion 1 are connected to each other. The positioning of the installation and the width dimension of the protrusion are determined so that the protrusion is substantially flush with the protrusion. In the embodiment, a protrusion 6 is provided on the inside of the rising side edge, and the width x extending from the protrusion 6 to the outer surface of the peripheral wall is extended from the inside of the cylindrical part 1 in the protrusion 7 of the plate part 5a to the locking piece. Width to the outside of the plate part 5a that constitutes the outer peripheral wall when 5 is erected in the missing part 4
It is assumed to be approximately the same as x′.

Also, a slight gap y is interposed between the missing portion 4 and the locking piece 5 housed therein, and the convex portions 6 and 7 are located between the locking piece 5 and the rising peripheral wall of the cylindrical portion 1. They can be freely engaged and disengaged from each other by elastic deformation.
In addition, instead of engaging and disengaging the locking piece 5 using the protrusions 6 and 7, other locking means may be used, such as directly locking the locking piece 5b of the locking piece 5 to the edge of the mounting hole. be.

In the embodiment described above, with the intention of facilitating the installation operation of the edge cover A and increasing the installation strength of the edge cover A, a protruding piece 3, a locking piece 5, 5, and the locking piece 5b of the locking piece 5 is parallel to the flange 2, and the spacing between the protrusion 3 and the flange 2 is the same, except for the protrusion 3. Locking piece 5
Sometimes only.

Furthermore, in the edge cover A of the above-mentioned embodiment, a cutout part 8 is provided in the part of the collar 2 corresponding to the protruding piece 3 so that the molding can be performed only by cutting from the upper and lower sides and from the left and right sides, and the locking piece 5 is provided in the third part. It is molded in the state shown in Figure 5.

In addition, in the edge cover A described above, the inner sides of the respective cylindrical edges 1a and 1b of the cylindrical portion 1 are rounded edges 1a' and 1b', and the pipe inserted into this edge cover A,
I try to avoid scratches from cords, etc.

The edge cover A having the above structure is fitted from the side opposite to the punch side of the burring hole B so that the protruding piece 3 of the edge cover A is engaged with the hole edge of the burring hole B on the punch side. Next, each locking piece 5 is raised toward the notch 4, and the convex part 7 of the locking piece 5 is engaged with the convex part 6 on the side edge of the peripheral wall of the notch 4, so that the locking piece 5 is fixed flush with the circumferential wall of the cylindrical portion 1, and the rising cylindrical portion of the burring hole B is held between the locking piece 5b and the collar 2.

Although the above embodiment shows an example in which the edge cover A is attached to the burring hole B, the edge cover A described above is used for attaching to various attachment holes other than the burring hole. The rising width of the peripheral wall, the protruding width of the flange 2, the protruding width of the protruding piece 3, and the protruding width of the locking piece 5b are respectively set according to the depth of the hole in which it is installed and the chamfering of the hole edge.

(Effect of the invention) The edge cover A according to the present invention has the characteristic structure described above, so that even when it is necessary to install the edge cover A from the opposite punch side of the burring hole B, the edge cover A is attached to the burring hole B.
The fitted edge cover A is easily fitted, and the fitted edge cover A is locked by the locking piece 5 to sufficiently hold the hole edge of the burring hole B and will not fall off.

In particular, even if the mounting hole such as the burring hole B has a large chamfer or radius on the hole edge facing the insertion side of the edge cover A, reliable support is provided by the locking piece 5b of the locking piece 5. ,
The mounting edge cover A does not come off from the mounting hole during use.

Further, since the locking piece 5 locks the projection 7 of the locking piece 5 with the projection 6 on the side edge of the circumferential wall of the cutout 4 of the cylindrical portion 1, a force in the extraction direction is applied to the edge cover A. It has the advantage that the edge cover A does not fall off even if the edge cover A is attached to the cylindrical part 1, and the engagement with the mounting hole is prevented by tilting the locking piece 5b of the locking piece 5 inward of the cylindrical part 1. It has the advantage that it can be unraveled and the edge cover A can be replaced immediately.

Further, since the edge cover A is attached and detached by bending the hinge portion 5c of the locking piece 5, the edge cover A can be repeatedly attached to and removed from the burring hole B, etc.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the edge cover according to the present invention, Figs. 2 and 3 are sectional views showing how it is attached to the burring hole B, Fig. 4 is a plan view of the edge cover, and Fig. 5 is a perspective view showing an embodiment of the edge cover according to the present invention. Fig. 4 is a sectional view taken along line A--A, Fig. 6 is a cutaway side view of the same essential parts, Fig. 7 is a bottom view of the same, Fig. 8 is a perspective view of the conventional edge cover, and Fig. 9 is a cross section showing the same installation state. 10 are cross-sectional views showing how another conventional edge cover is attached. 1... Cylinder part, 2... Flange, 3... Projection piece, 4... Missing part, 5... Locking piece, 6, 7... Convex part, 8... Missing part, 9... Tube 10... collar, 11... slit, 12... elastic engagement piece, 13... engagement convex portion.

Claims (1)

[Claims for Utility Model Registration] A cylindrical portion 1 made of synthetic resin, a flange 2 provided outwardly on one cylindrical edge 1a of the cylindrical portion 1 in a direction orthogonal to the circumferential wall of the cylindrical portion 1; A cutout portion 4 provided from the other cylindrical edge 1b side of the cylindrical portion 1 toward the cylindrical edge 1a side is integrated with the cylindrical portion 1 from the side of the cylindrical edge 1a via a hinge portion 5c. A locking piece 5 is provided, and the locking piece 5 is a plate portion 5a that can be raised and lowered from the inside of the tube portion 1 toward the cutout portion 4 of the tube portion 1.
and a locking piece portion 5 bent at a substantially right angle from the free end side of the plate portion 5a toward the cutout portion 4 side.
b, characterized in that a locking piece portion 5b of the locking piece 5 erected in the cutout portion 4 is substantially parallel to the collar 2 of the cylindrical portion 1.