JP4692876B2 - Edge protector - Google Patents

Description

  The present invention relates to an edge protector that protects an electric wire or cable from being damaged when the electric wire or cable is passed through an edge portion of a plate material such as a sheet metal or a printed board in various electronic / electrical devices.

  Conventionally, when an electric wire is passed through an edge portion of a plate material such as a sheet metal or a printed board, the universal bush disclosed in Patent Document 1 has been used. As shown in the perspective view of FIG. 11, the universal bush 41 disclosed in Patent Document 1 is provided with a belt-like flat plate 42 and side plates 43, 43 rising from both sides of the belt-like flat plate 42, and is formed in a substantially U-shaped cross section. In this case, the side plate 43 is appropriately cut out.

  However, the bush 41 holds the edge portion between the side plates 43 and 43, and the force for holding the edge portion is weak. In particular, since the plate thickness cannot be changed, it is necessary to perform fixing with an adhesive or a tape. For this reason, the fixing work takes time, and the adhesive and the tape are peeled off due to a change with time, and the bush 41 may be detached from the edge portion.

  In order to remedy this drawback, as disclosed in Patent Document 2, wedge-shaped projections that project inwardly to the front ends of the opposing side plates are opposed to each other at appropriate positions on the side plates that rise from both sides of the belt-like flat plate. When the bushing is attached to the edge part, the wedge-shaped protrusion is engaged with the hole part formed on the edge part, and the side plate A device has been devised that increases the holding force to the edge portion.

Shokai 61-79421 Akira 61-166411

  However, what is described in Patent Document 2 is formed such that wedge-shaped projections projecting inwardly at the front end of the side plate are opposed to each other, and the molding die has an interval between the opposed projections and the projections. Since it was necessary to leave the plate so that it was not damaged, when the plate was thin, the wedge-shaped projection did not engage the hole formed in the edge portion even when trying to attach the bush to the edge portion, or Since there are few engaging parts with a hole part, there existed a fault which would be easily removed.

  An object of the present invention is to solve such a conventional problem, and the fixing work does not take time, and the fixing protrusion is securely engaged with the hole formed in the edge portion. An object of the present invention is to provide an edge protector that does not easily come off the hole.

  The present invention employs the following configuration in order to achieve this object.

  That is, in an edge protector that is provided with a belt-like bottom portion and side plates that rise from both sides in the longitudinal direction of the belt-like bottom portion and is formed in a substantially U-shaped side surface, a lock piece that rises from both sides of the belt-like bottom portion in the longitudinal direction instead of a part of the side plate Are provided at a suitable interval in the longitudinal direction so as to face each other at both sides in the longitudinal direction, and engaging protrusions are provided at the tips of the pair of lock pieces so as to protrude alternately inwardly. A pair of engaging projections protruding alternately are formed so as to engage with one hole formed in the edge portion of the sheet metal at the opposite position when inserted into the edge portion of the sheet metal.

  According to this configuration, since the opposing engagement protrusions of the lock pieces protrude alternately, at least one of the pair of engagement protrusions is relative to the edge of the sheet metal when the edge protector is to be mounted. It securely engages with one hole formed in the edge portion of the sheet metal at the position.

  A plurality of concave grooves can be formed at appropriate positions in the belt-like bottom portion substantially at right angles to the longitudinal direction.

  By forming a plurality of concave grooves in the belt-like bottom portion, the belt-like bottom portion can be easily bent, so that it can be easily attached to an R-shaped sheet metal.

  It is desirable that the engaging protrusions that protrude in a staggered manner be formed so as to be point-symmetric for each pair in the longitudinal direction.

  When the engagement protrusion is engaged with the hole formed in the edge part of the plate material by changing the method of projecting the engagement protrusion so that it is point-symmetric for each pair in the longitudinal direction, Since the engagement protrusion engages with the position where the backlash in the longitudinal direction is reduced, the backlash in the longitudinal direction can be reduced.

  The present invention is configured as described above, and since the engaging protrusions of the lock pieces facing each other are provided so as to protrude alternately, even if the plate material is thin, it is intended to attach the edge protector to the edge. Then, since at least one of the pair of engaging protrusions reliably engages with one hole, it is possible to provide an edge protector that does not easily come off.

  Next, an embodiment of an edge protector according to the present invention (hereinafter referred to as an example) will be described with reference to the drawings.

  FIG. 1 is a perspective view before mounting showing the use state of the edge protector 1 of the embodiment of the present invention, FIG. 2 is a front view, FIG. 3 is an enlarged view of FIG. 2, and FIG. FIG. 5 is an enlarged side view of FIG. 3, FIG. 6 is an AA sectional view of FIG. 4, FIG. 7 is an enlarged view of part C of FIG. 4, and FIG. FIG. 9 is a cross-sectional view showing an engaged state between the protrusion and the hole.

  As shown in FIGS. 1 and 2, the edge protector 1 according to the embodiment of the present invention is a side plate 3 that rises from both sides in the longitudinal direction of the strip-shaped bottom portion 2 and the strip-shaped bottom portion 2 and supports the edge portion 22 of the sheet metal 21. And. Instead of a part of the side plate 3, lock pieces 5 and 6 rising from both sides in the longitudinal direction of the belt-like bottom 2 are provided at a plurality of locations at appropriate intervals in the longitudinal direction. As shown in FIGS. 4 and 5, the lock pieces 5 and 6 are provided as a pair on both sides in the longitudinal direction, and the engaging protrusions 7 and 8 are provided on the inner ends of the lock pieces 5 and 6 respectively. It is provided so as to protrude alternately. In the hole 23 formed in the edge part 22 of the sheet metal 21 at a position opposite to each other when the pair of engagement protrusions 7 and 8 protruding alternately among the engagement protrusions 7 and 8 are inserted into the edge part 22 of the sheet metal 21. It forms so that it may engage.

  The method of projecting the alternately projecting engagement protrusions 7 and 8 is formed so as to be point-symmetric for each pair in the longitudinal direction (before and after adjacent). That is, when the engagement protrusion 7a of one lock piece 5 is formed forward in the longitudinal direction and the engagement protrusion 8a of the opposite lock piece 6 is formed rearward in the longitudinal direction, the engagement protrusion 7b of the adjacent lock piece 5 is extended longitudinally. The engagement protrusion 8b of the lock piece 6 that is formed in the rearward direction is formed in the front in the longitudinal direction (see FIGS. 4 and 7). With this configuration, when the engagement protrusions 7 and 8 are engaged with the hole 23 formed in the edge portion 22 of the plate member 21, the plate thickness of the plate member 21 is thin when three or more hole portions 23 are formed. Even in this case, since the engagement protrusions 7 and 8 are engaged with the hole 23 at positions where the backlash in the longitudinal direction is reduced, the backlash in the longitudinal direction can be reduced.

  These engaging projections 7 and 8 project inwardly from the tip portions of the lock pieces 5 and 6, and the lower ends of the projections 7 and 8 are substantially horizontal. That is, the slope 11 is provided so that the distance between the opposing lock pieces 5 and 6 becomes wider toward the opening 10, and the protrusions 7 and 8 are provided on the edge portion 22 when inserted into the edge portion 22 of the sheet metal 21. It is easy to engage with the hole 23.

  Note that, as shown in the cross-sectional view of FIG. 6, the engagement protrusion 7 a is preferably formed in a shape that can be attached to the round hole.

  Further, as shown in FIG. 3, which is an enlarged view of FIG. 2, the side plates 3, 3 are provided with a plurality of notches 9, 9, 9,.

  In addition, a plurality of concave grooves 12 are formed at appropriate positions on the back surface of the strip-shaped bottom portion 2 in a direction substantially perpendicular to the longitudinal direction so that the strip-shaped bottom portion 2 can be easily bent, and a mounting portion for the sheet metal 21 is provided. Even in the case of the R shape, it is possible to cope.

  When the edge protector 1 according to the embodiment of the present invention is attached to the edge portion 22 of the sheet metal 21, the engagement protrusions 7 and 8 are placed at the positions of the holes 23 provided in the edge portion 22 of the sheet metal 21 in advance as shown in FIG. 1. When the apertures 10 are pushed together, the inclined surfaces of the engagement protrusions 7 and 8 expand in contact with the plate material 21, and the engagement protrusions 7 and 8 slide and elastically deform and expand on both sides of the thickness plate. When the engagement protrusions 7 and 8 eventually reach the hole 23, they are elastically restored and can be engaged and fixed to the hole 23 as shown in FIGS. Therefore, it can be easily attached to the sheet metal 21 without using an adhesive or a tape, and the engaging protrusions 7 and 8 are provided so as to protrude alternately, so that the sheet thickness of the sheet metal 21 is reduced. Thus, even when the backlash between the both side plates 3 and 3 occurs with the sheet metal 21, it can be reliably fixed.

  FIG. 10 is a front view showing the case where the edge protector 1 is attached to a sheet metal 31 having an R-shaped attachment portion. As described above, a plurality of notches 9, 9,. In addition, since the plurality of concave grooves 12, 12,... Are provided on the back surface of the belt-like bottom portion 2 in a direction substantially perpendicular to the longitudinal direction, it can be easily attached to the R-shaped attachment portion.

  The present invention is not limited to the above embodiments. For example, the positions of the lock piece 5 and the lock piece 6 in FIG. That is, the positions of the lock piece 5 and the lock piece 6 may be on either the left or right side of the belt-like bottom 2 as long as they are paired on the left and right. Furthermore, although eight pairs of lock pieces are provided, the number of the lock pieces 5 and 6 may be increased or decreased according to the use situation (length to be protected).

It is a perspective view before the attachment which shows the use condition of this invention Example. It is a front view which shows this invention Example. FIG. 3 is an enlarged view of FIG. 2. FIG. 4 is a plan view of FIG. 3. FIG. 4 is a side view of FIG. 3. It is AA sectional drawing of FIG. It is the C section enlarged view of FIG. It is a perspective view after the attachment which shows the use condition of this invention Example. FIG. 9 is a cross-sectional view showing an engaged state between the protrusion and the hole. It is a front view which shows the use condition of this invention Example. It is a perspective view which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Edge protector 2 Band-shaped bottom part 3 Side plate 5 Lock piece 6 Lock piece 7 Engagement protrusion 8 Engagement protrusion 9 Notch 12 Groove 21 Sheet metal 22 Edge part 23 Hole part

Claims (3)

  In an edge protector that is formed in a substantially U-shaped side surface with a belt-like bottom and side plates that rise from both longitudinal sides of the belt-like bottom, a lock piece that rises from both longitudinal sides of the belt-like bottom is used instead of a part of the side plate. Provided at a suitable interval in a plurality of locations at opposite intervals and on both sides in the longitudinal direction, and provided with engaging protrusions at the tips of the lock pieces that are paired so as to protrude alternately inward. An edge protector formed by engaging a pair of engaging projections that alternately project into one hole formed in the edge portion of the sheet metal at a position opposite to each other when inserted into the edge portion of the sheet metal.   The edge protector according to claim 1, wherein the belt-shaped bottom portion is formed with a plurality of concave grooves at appropriate positions substantially perpendicular to the longitudinal direction.   The edge protector according to claim 1 or 2, wherein the alternately projecting engagement protrusions are formed so as to be point-symmetric for each pair in the longitudinal direction.

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