Cable lead-in port cover

Abstract

To provide a cable lead-in port cover in which construction means can be changed according to a work site.SOLUTION: A frame body 10 is constituted by a pair of divided pieces 11 that can be freely divided and joined. The pair of divided pieces 11 include a fitting recess 14 and a fitting projection 15 at divided ends. When the fitting recess 14 is fitted to the fitting projection 15, the frame body 10 is assembled. A filler 20 to be filled into the frame body 10 is disposed. A gap in the periphery of a led-in cable Q is blocked with the frame body 10 and the filler 20. The fitting recess 14 or the fitting projection 15 is formed on the divided end of each of the divided pieces 11. The fitting recess 14 and the fitting projection 15 are fitted to be freely slidable in a vertical direction.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a cable inlet cover installed at a cable inlet of a distribution board, a switchboard, or the like.

Background Art

[0002] Conventionally, in order to close the cable inlets of distribution boards and switchboards, the cable inlets were closed with putty or the like, and when the opening was large, a bakelite plate, a resin plate, or the like was used to make the opening the minimum required and then closed with putty or the like.

[0003] Such putty closing work needs to be performed on all the cable inlets of distribution boards and the like. For example, in a general distribution board, there is one inlet for the primary side (CVT cable) and two inlets for the secondary side (F cable), for a total of three inlets. Therefore, at a site where many distribution boards and the like are used, a lot of labor and time are required for the work of closing numerous inlets.

[0004] Therefore, the applicant has previously proposed a cable inlet cover that can perform this work in a short time by using a resin mold and a corrugated sponge (Patent Document 1). This cover includes a frame body 10 to be attached to the inlet P1 and a filling material 20 to be filled in the frame body 10, and the filling material 20 is configured to fill the gap of the inlet P1.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In the cover described in Patent Document 1, in order to attach the cover to the lead-in port P1, the only means available was to first connect the split pieces 11 to each other to form the frame body 10 and then attach this frame body 10 to the lead-in port P1.

[0007] However, since the diameter and number of the cables inserted into the lead-in port P1 vary depending on the site, in the means for attaching the frame body 10 to the lead-in port P1, not only is it necessary to first form the frame body 10, but it is also desirable to have a cover that can change the construction means according to the site, such as forming the frame body 10 while attaching the split pieces 11 to the lead-in port P1.

[0008] Therefore, the present invention was created to solve the above problems, and an object thereof is to provide a cable lead-in port cover that can change the construction means according to the site.

Means for Solving the Problems

[0009] To achieve the above object, a first means in the present invention includes a frame body 10 formed by a pair of split pieces 11 that can be freely split and joined and attached to the lead-in port P1, and a filler material 20 filled in the frame body 10. In a cable lead-in port cover that closes the gap around the drawn-in cable Q, the frame body 10 forms either a fitting recess 14 or a fitting projection 15 at each split end of the split piece 11, and the frame body 10 is assembled by the fitting recess 14 and the fitting projection 15 fitting together so as to be slidable up and down.

[0010] The frame body 10 of the second means includes a support piece 12 placed around the upper surface of the lead-in port P1 inside the lower end of the split piece 11, and an insertion piece 13 inserted along the inside of the opening edge of the lead-in port P1 from the support piece 12, and is configured to fill the filler material 20 on the upper surface side of the support piece 12.

[0011] The frame body 10 of the third means is provided such that the fitting projection 15 formed at the split end of the other split piece 11, which faces the fitting recess 14 formed at the split end of one of the split pieces 11, can be freely pushed into the fitting recess 14.

[0012] The frame body 10 of the fourth means shall be formed of a flame-retardant or low-combustibility material.

[0013] The filling material 20 of the fifth means is formed of a low-combustibility polyethylene urethane foam.

[0014] The sixth means includes a frame body 10 formed of a pair of split pieces 11 that can be freely split and joined and is attached to the lead-in port P1, and a filling material 20 filled in the frame body 10. In the cable lead-in port cover that closes the gap around the drawn-in cable Q, the frame body 10 is provided so as to fit a fitting recess 14 formed at the split end of one of the split pieces 11 and a fitting protrusion 15 formed at the split end of the other split piece 11 facing the fitting recess 14. The fitting recess 14 and the fitting protrusion 15 are each provided with one on each split piece.

[0015] The seventh means includes a frame body 10 formed of a pair of split pieces 11 that can be freely split and joined and is attached to the lead-in port P1, and a filling material 20 filled in the frame body 10. In the cable lead-in port cover that closes the gap around the drawn-in cable Q, the lower parts of the split pieces 11 are faced to temporarily install the split pieces 11 in the lead-in port P1, and then as the upper parts are closed, the fitting recesses 14 and the fitting protrusions 15 are fitted together, and the split pieces 11 are integrated.

[0016] The frame body 10 of the eighth means is provided so as to fit a fitting recess 14 formed at the split end of one of the split pieces 11 and a fitting protrusion 15 formed at the split end of the other split piece 11 facing the fitting recess 14. The fitting recess 14 and the fitting protrusion 15 are each provided with one on each split piece.

Advantages of the Invention

[0017] The frame body 10 is provided so that the fitting recess 14 formed along the longitudinal direction of the split end of the split piece 11 and the fitting protrusion 15 formed at the split end and fitting into the fitting recess 14 are fitted so as to be slidable up and down or pushable in. As a result, it becomes possible to appropriately change the construction means of the frame body 10 according to the site conditions.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Modes for Carrying Out the Invention

[0019] The cover of the present invention is a cover for a cable inlet that closes the gap around the cable Q drawn into the inlet P1 of a distribution board P, a switchboard, or the like. The cover of the present invention is composed of a frame body 10 and a filler 20 (see FIG. 2).

[0020] The frame body 10 is a member that is mounted along the inlet P1 on the top plate P2 of the distribution board P or the like (see FIG. 3). This frame body 10 is configured by connecting a pair of dividable divided pieces 11 (first divided piece 11a, second divided piece 11b), and is configured to surround the side surface of the cable Q drawn into the inlet P1 with the frame body 10 (see FIG. 1).

[0021] The dividing piece 11 is a member formed in a frame shape made of a flame-retardant or low-combustibility synthetic resin material, and has a support piece 12 inside the lower end portion. Then, the support piece 12 is placed on the upper surface side of the opening edge of the drawing-in port P1, that is, on the top plate P2 (see Fig. 3). Further, an insertion piece 13 is bent and formed from the tip of this support piece 12, and this insertion piece 13 is inserted and fixed along the inside of the opening edge of the drawing-in port P1.

[0022] The illustrated dividing piece 11 has a planar arc shape, forms a fitting recess 14 along the longitudinal direction of the dividing end portion, and has a fitting convex portion 15 protruding from the side edge facing this dividing side edge (see Fig. 4). Therefore, the fitting convex portion 15 can be slid and fitted from above the fitting recess 14 (see Fig. 5), or can be pushed in and fitted from the front side of the fitting recess 14 (see Fig. 7(A)). In this way, the means for combining the dividing pieces 11 to form the frame body 10 can be changed.

[0023] The illustrated fitting recess 14 forms a groove portion 14B in which a fitting portion expands at the back of the opening portion 14A, and one side of the groove portion 14B is formed so as to be eccentric from the center of the opening portion 14A (see Fig. 4). And a ridge 15A that fits into this groove portion 14B is provided protruding from the tip side of the fitting convex portion 15. Incidentally, the illustrated fitting recess 14 and fitting convex portion 15 are formed in a part along the longitudinal direction of the dividing end portion of the dividing piece 11 (see Fig. 2), but it is also possible to form them in the whole along the longitudinal direction of the dividing end portion. The number of the fitting recesses 14 and fitting convex portions 15 may be one set in the longitudinal direction, or may be two sets or more.

[0024] The frame body 10 shown in Fig. 8 shows another embodiment. This frame body 10 is provided with a connecting portion 16 and a polymerizing portion 17 at the dividing end portion of the dividing piece 11. The connecting portion 16 has locking protrusions 16A that can expand up and down on one side of the dividing end portion, forms a locking opening portion 16B on the other side of the dividing end portion, and locks the locking protrusions 16A in this locking opening portion 16B.

[0025] At this time, since the locking protrusions 16A are formed so as to be expandable by the elasticity of the synthetic resin material, the locking means to the locking opening portion 16B can lock from above or the front of the dividing end portion.

[0026] On one hand, the overlapping portion 17 includes an insertion piece 17A protruding from the central side of the divided end of the divided piece 11 and an overlapping recess 17B that overlaps with the insertion piece 17A (see Fig. 8). By overlapping these insertion piece 17A and overlapping recess 17B, the connection strength of the divided piece 11 can be increased. Also, this overlapping portion 17 can be formed not only on the divided piece 11 in Fig. 8 but also on the divided piece 11 shown in Fig. 2.

[0027] The filling material 20 is a member to be housed in the gap between the frame body 10 and the cable (see Fig. 1), and is configured to have a length that can be wound around the cable Q (see Fig. 2). This filling material 20 is formed of, for example, a foamed plastic or polymer material including a low-combustibility polyethylene urethane foam, or a material such as a sponge.

[0028] Also, this filling material 20 may be formed of a sponge-like material that can be compressed and deformed, such as a foamed resin material, and may be configured to surround the cable Q in a compressed state with a pair of filling materials 20 (see Fig. 7(c)). This pair of filling materials 20 may be provided in advance on each divided piece 11. The filling material 20 only needs to prevent the gap between the frame body 10 and the cable, and may have, for example, a shape with a cut in a part of the tubular shape, and the shape is not particularly limited.

[0029] In the illustrated example, a large number of protrusions 21 are alternately formed on the cable contact surface (see Fig. 2). These protrusions 21 bulge out at various positions such as around the cable Q and the gaps between the cables Q, and can fill the gaps.

[0030] Next, the construction procedure of the present invention will be described (see Fig. 7). In the illustrated example, it is the procedure of first connecting the divided pieces 11 to form the frame body 10 (see Fig. 7(a)). That is, the divided pieces 11 are fitted from the front to form the frame body 10 (see Fig. 7(b)), and are attached to the lead-in port P1 (see Fig. 7(c)). Then, the closing operation of the lead-in port P1 is completed only by housing the filling material 20 arranged around the cable Q in the frame body 10 attached to the lead-in port P1.

[0031] As another mounting means for the frame body 10, it is also possible to first mount one split piece 11 on the insertion port P1 and then connect and mount the other split piece 11 (see Fig. 6). In this case, the split piece 11 to be mounted later can be mounted while forming the frame body 10 by fitting it slidably from above the one split piece 11. (The split piece 11 to be mounted later may be pushed in and fitted from the front side of the one split piece 11. That is, the lower parts of the respective split pieces 11 may face each other, and then the fitting concave portions 14 and the fitting convex portions 15 may be fitted as the upper parts are closed). Further, when first mounting one split piece 11 on the insertion port P1 and then connecting and mounting the other split piece 11, the insertion piece 13 of at least the split piece 11 to be mounted later is formed at a position where it does not interfere with the split piece 11 mounted first. Thus, the mounting process of the frame body 10 can be arbitrarily changed according to the site conditions.

[0032] Also, as in the present invention, by providing the support piece 12 placed on the upper surface side of the opening edge of the insertion port P1 inside the lower end portion of the split piece 11, it becomes possible to insert the cable Q by making the most of the opening diameter of the insertion port P1. Moreover, by configuring to fill the filling material 20 on this support piece 12, the inconvenience that the amount of the filling material 20 is limited as in the prior art is eliminated even when making the most of the opening diameter of the insertion port P1. (Configuration example) A cable inlet cover for a distribution board, comprising a frame body 10 formed by a pair of split pieces 11 that can be split and joined and mounted on an insertion port P1, and a filling material 20 filled in the frame body 10, for closing the gap around the cable Q drawn into the insertion port P1. The frame body 10 includes a support piece 12 placed on the upper surface side of the opening edge of the insertion port P1 inside the lower end portion of the split piece 11, and further includes an insertion piece 13 inserted along the inner side of the opening edge of the insertion port P1 from the support piece 12. A cable inlet cover for a distribution board, characterized in that it is configured to fill the filling material 20 on the upper surface side of the support piece 12.

[0033] That is, for example, in the cover described in Patent Document 1, an insertion piece 12 to be inserted inside the opening edge of the insertion port P1 is formed at the lower end of the frame body 10, a locking piece 13 is formed outside the insertion piece 12 to lock to the upper part of the opening edge of the insertion port P1, and a support piece 15 protrudes inside the insertion piece 12 and is configured to receive the filling material 20 pushed into the frame body 10.

[0034] Therefore, this support piece 15 narrowed the opening diameter of the insertion port P1, and it was not possible to pass a cable or the like through the entire insertion port P1. Thus, when trying to widen the opening diameter of the insertion port P1 even slightly by narrowing the width of the support piece 15, there is a problem that the amount of the filling material 20 filled on the support piece 15 is limited. According to the present invention, such a problem can be solved.

[0035] In addition, the shape and the like of each configuration of the present invention are not limited to the illustrated examples, and design changes can be freely made without changing the gist of the present invention. Further, the application of the present invention is not limited to a distribution board or a switchboard, and it can also be used for various insertion ports for drawing in a plurality of cables.

[0036] In the above-described embodiment, the state in which the fitting concave portion 14 and the fitting convex portion 15 are provided at the divided end portions of each divided piece 11 is shown. However, only the fitting concave portion 14 may be provided on one divided piece, and only the fitting convex portion 15 may be provided on the other divided piece. That is, the fitting concave portion 14 may be provided at one divided end portion of the first divided piece, the fitting concave portion 14 may also be provided at the other divided end portion of the first divided piece, the fitting convex portion 15 may be provided at one divided end portion of the second divided piece, and the fitting convex portion 15 may also be provided at the other divided end portion of the second divided piece. It is only necessary to arrange a combination of the fitting concave portion 14 and the fitting convex portion 15 at the divided end portions of the respective divided pieces 11 facing each other, and it is arbitrary which of the divided end portions of which divided piece 11 the fitting concave portion 14 and the fitting convex portion 15 are arranged.

Explanation of Signs

[0037] P Distribution board P1 Insertion port P2 Top plate Q Cable 10 Frame body 11 Dividing piece 12 Support piece 13 Insertion piece 14 Fitting recess 14A Opening 14B Groove 15 Fitting projection 15A Ridge 16 Connecting part 16A Locking projection 16B Locking opening 17 Overlapping part 17A Insertion piece 17B Overlapping recess 20 Filling material 21 Protrusion

Claims

1. A cable inlet cover for a distribution board, comprising a frame formed by a pair of split pieces that can be joined together and attached to an inlet, and a filling material filled in the frame, wherein the frame forms either a fitting recess or a fitting protrusion at each split end of the split pieces, and the frame is assembled by fitting the fitting recess and the fitting protrusion slidably up and down.

2. The cable inlet cover for a distribution board according to claim 1, wherein the frame includes a support piece placed inside the lower end of the split piece and around the upper surface of the inlet, and an insertion piece inserted along the inner side of the opening edge of the inlet from the support piece, and the filling material is configured to be filled on the upper surface side of the support piece.

3. The cable inlet cover for a distribution board according to claim 1, wherein the frame is provided such that the fitting protrusion formed at the split end of the other split piece that faces the fitting recess formed at the split end of one of the split pieces can be fitted into the fitting recess in a push-in manner.

4. The cable inlet cover for a distribution board according to claim 1, wherein the frame is formed of a flame-retardant or low-combustibility material.

5. The cable inlet cover for a distribution board according to claim 1, wherein the filling material is formed of a low-combustibility polyethylene urethane foam.

6. A cable inlet cover for a distribution board, comprising a frame formed by a pair of split pieces that can be joined together and attached to an inlet, and a filling material filled in the frame, wherein the frame is provided to fit a fitting recess formed at the split end of one split piece and a fitting protrusion formed at the split end of the other split piece that faces the fitting recess, and one fitting recess and one fitting protrusion are provided on each split piece respectively.

7. A cable inlet cover for a distribution board, comprising a frame formed by a pair of split pieces that can be joined together and attached to an inlet, and a filling material filled in the frame, wherein the lower parts of the split pieces are opposed to each other so that the split pieces are temporarily installed at the inlet, and then as the upper parts are closed, the fitting recesses and the fitting protrusions are fitted together and the split pieces are integrated.

8. The frame body is provided so as to fit a fitting concave portion formed at a split end of one of the split pieces and a fitting convex portion formed at a split end of the other split piece facing the former, and one fitting concave portion and one fitting convex portion are provided for each of the split pieces, respectively. The cable inlet cover for a distribution board according to claim 7.

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