JP3310587B2 - Shielding structure for floor panel openings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for shielding an opening of a floor panel.

[0002]

2. Description of the Related Art In a floor panel for free access, wiring for crawling in a space under the floor is provided by OA on the floor panel.
An opening for attaching an outlet box for connecting to equipment or the like is formed. When the outlet box is not attached to this opening, a cover plate is attached to the opening and the lid is closed.

For example, in a conventional example disclosed in Japanese Patent Application Laid-Open No. Hei 6-165351, a closing plate is formed by vertically suspending a side plate from one end of the flat plate at a right angle to the flat plate. A knockout portion was formed in the flat portion, and an end of the knockout portion formed in the flat plate portion was opened at an end opposite to the side plate portion. When pulling out only the electric wire with the closing plate attached to the opening, the knockout portion formed in the flat plate portion is knocked out to form a knockout opening, and the electric wire is drawn out from this knockout opening. Since the knockout opening is opened inside the floor panel, the electric wire cannot be pulled out without removing the closing plate, which causes a problem that it takes time and effort.

Further, in the prior art, since the closing plate is formed by suspending the side plate portion from one end of the flat plate portion at right angles to the flat plate portion, both ends of the flat plate portion of the closing plate are formed. Is placed on both edges of the opening of the floor panel, and the center of gravity of the closing plate is located in a direction in which the side plate portion of the flat plate is hung downward, so that the tip end of the flat plate portion (opposite to the side plate portion) There is a problem that the side (end) side is easily lifted upward.

[0005] In the conventional knockout section,
When a load is applied from above, there is a problem that it may be inadvertently removed.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and enables wiring without removing a closing plate. An object of the present invention is to provide a shielding structure for an opening of a floor panel that does not float and can withstand a large load, and that does not inadvertently remove a knockout portion even when a load is applied from above. Things.

[0007]

In order to solve the above-mentioned problems of the present invention, a structure for shielding an opening of a floor panel according to the present invention is provided so that at least one edge of the floor panel 1 is cut off. A side plate portion 4 is bent obliquely downward from the front end of the flat plate portion 3 at an angle of less than 90 ° with respect to the flat plate portion 3 to form a closing plate 5. A knockout portion 6 which can be removed over the entire surface of the floor panel 1 is detachably mounted on an edge of the flat plate portion 3 of the closing plate 5 on an edge of the opening 2 of the floor panel 1. . With such a configuration, when the knockout portion 6 is removed, the knockout opening 9 can be opened so as to face the outside of the floor panel 1, and
Even when the closing plate 5 is attached to the opening 2 of the floor panel 1 and remains closed, the electric wire 10 can be pulled out from the outside of the floor panel 1 to the knockout opening 9. Also, from the front end of the flat plate portion 3 to the flat plate portion 3
Obliquely downward at an angle of less than 90 ° to the side plate portion 4
Is folded to form the closing plate 5, the closing plate 5
Are positioned so that the center of gravity of the closing plate 5 is as far as possible away from the corner portion of the closing plate 5 than the corner portion of the closing plate 5 in a state in which both end portions of the closing panel 5 are detachably locked to both side edges of the opening 2 of the floor panel 1. The end portion of the flat plate portion 3 can be prevented from floating.

It is preferable that the knockout section 6 includes two types of knockout sections 6 for a communication system electric wire and a commercial power supply line. With this configuration, the communication system electric wire and the commercial power line can be separately extracted. Further, it is preferable that a lower hole 7 continuous with the knockout portion 6 is provided below the side plate portion 4 of the knockout portion 6 for the commercial power supply line. By adopting such a configuration, when knocking out knockout portion 6, knockout portion 6 is removed and knockout opening 9 is formed after knockout portion 6 is removed, although knockout portion 6 is reduced in area to facilitate knockout. And the lower hole 7 communicate with each other to form an opening having a large area, so that an opening area which does not hinder insertion of the commercial power supply line can be secured.

Further, it is preferable that the lateral width of the knockout portion 6 be the maximum width at the bent portion. With such a configuration, the knockout portion 6 cannot be removed even when a load is applied to the knockout portion 6 from the front surface side, and is removed only when a load is applied to the knockout portion 6 from the rear surface side.
Can be formed. Further, the knockout portion 6 does not reach the lower end of the side plate portion 4 and
It is preferable that the lower end of the lower part 8 is a lower piece 8 which is continuous in the lateral direction. That is, although the knockout portion 6 is provided so as to reach the side plate portion 4 and is opened outside the floor panel 1, the lower end portion of the side plate portion 4 becomes the lower piece portion 8 which is continuous in the lateral direction. By doing so, the strength of the side plate portion 4 increases, and the side plate portion 4 can withstand a large load.

The flat plate portion 3 is arranged side by side with the knockout portion 6.
It is preferable to provide a preformed opening 14 extending from the side plate portion 4 to the side plate portion 4. With such a configuration, even when the knockout portion 6 is not removed, the electric wire can be drawn out using the opening 14 formed in advance from the flat plate portion to the side plate portion.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments shown in the accompanying drawings. As shown in FIG. 4, the floor panel 1 is supported on the slab 12 by the support legs 11. By laying a large number of floor panels 1, the space between the floor panel 1 and the slab 12 can be reduced. Gap 1
Thus, a so-called free access floor where 3 is formed is formed. An opening 2 is formed in any one of the floor panels 1 so as to cut out at least one edge. At the edge of the opening 2, a receiving edge 17 is provided slightly below the surface of the floor panel 1.

An outlet box (not shown) for connecting to OA equipment or the like on the floor panel can be attached to the opening 2 of the floor panel 1 using the receiving edge 17. However, when an outlet box is not attached to the opening 2, a closing plate 5 described later is attached to the opening 2 to close the lid. The closing plate 5 is made of metal, and is formed by bending the side plate portion 4 obliquely downward from the front end of the flat plate portion 3 at an angle of less than 90 ° with respect to the flat plate portion 3 as shown in FIG. is there.
In the embodiment shown in the accompanying drawings, the flat plate portion 3 and the side plate portion 4
Is about 70 °, but is not necessarily limited to this. The closing plate 5 has a knockout portion 6 which can be removed from the flat plate portion 3 to the side plate portion 4. In the embodiment shown in the accompanying drawings, two types of knockout portions 6a and 6b for a communication system electric wire and a commercial power line are arranged side by side as the knockout portion 6. The knockout portion 6b for the commercial power supply line is wider than the knockout portion 6a for the electric wire of the communication system. The knockout portion 6 does not reach the lower end of the side plate portion 4, and the lower end portion of the side plate portion 4 is a lower piece portion 8 that is continuous in the lateral direction.

The closing plate 5 having the above-described configuration is mounted on the receiving edge 17 formed at the edge of the opening 2 of the floor panel 1 by placing the edge of the flat plate 3 on the floor panel 1. The first opening 2 is closed. Floor panel 1
Through the opening 2 of the communication line or a commercial power line
When it is necessary to pull out the wire, the knockout portion 6 is removed by applying a load to form the knockout opening 9, so that the electric wire 10 can be pulled out using the knockout opening 9. In this case, the electric wire of the communication system passes through the knockout opening 9 formed by removing the knockout portion 6a for the electric wire of the narrow communication line, and the electric wire such as the commercial power supply line is used as the knockout portion for the wide commercial electric power line. 6
b is passed through a knockout opening 9 formed by removing b.

The knock-out portion 6 may be punched in advance and placed on the receiving edge 17 of the opening 2 of the floor panel 1 with the knock-out opening 9 opened. 6, the knockout opening 9 may be opened. And
When the electric wire 10 is drawn out through the knockout opening 9 after the knockout opening 9 is formed, the knockout opening 9 is formed so as to extend from the flat plate portion 3 to the side plate portion 4, and as shown in FIG. The electric wire 10 can be passed through the knockout opening 9 and can be drawn out without removing the blocking plate 5 when the electric wire 10 is pulled out.

FIGS. 6 to 8 show another embodiment of the present invention. In this embodiment, a pre-formed opening 14 extending from the flat plate portion 3 to the side plate portion 4 is provided alongside the knockout portion 6. is there. That is, since the pre-formed opening 14 extending from the flat plate portion 3 to the side plate portion 4 is provided side by side with the knock-out portion 6, even if the knock-out portion 6 is not punched out, the electric wire 1 can be made using the pre-formed opening 14.
Can be withdrawn through zero. 6 to 8, the preformed opening 14 is a communication wire opening, the knockout portion 6 is a commercial power supply knockout portion, and the width of the preformed opening 14 is the commercial power supply line. The width of the knockout portion 6 is made smaller than the width of the knockout portion 6, and the knockout portion 6 is drawn out through an electric wire of a communication system by using the preformed opening 14.
Are punched out to form a knockout opening 9, and the knockout opening 9 is drawn through a commercial power supply line.

Further, in the present invention, as shown in FIG. 8, a lower hole 7 continuous with the knockout portion 6 is formed in advance below the side plate portion 4 of the knockout portion 6 for the commercial power supply line. Good. In other words, when knocking out the knockout portion 6, the knockout opening 9 and the lower hole 7 remain after the knockout portion 6 is removed, although the area of the knockout portion 6 is made as small as possible to facilitate knockout. It becomes a large area opening communicating with
An opening area that does not hinder insertion of the commercial power supply line can be secured.

As shown in FIG. 8, the lateral width of the knockout portion 6 formed from the flat plate portion 3 to the side plate portion 4 is the maximum width at the bent portion (that is, at the corner formed by the flat plate portion 3 and the side plate portion 4). Then, the knockout portion 6 cannot be removed even when a load is applied from the front surface side, and can be removed only when a load is applied from the back surface side. Therefore, the edge of the flat plate portion 3 of the closing plate 5 is connected to the floor panel 1.
Even if a load is applied to the knockout portion 6 from above in a state where the knockout portion 6 is placed on the receiving edge 17 formed at the edge of the opening 2 and the opening is closed, the knockout portion 6 is not removed. .

In the present invention, both the knockout portion 6 and the opening 14 do not reach the lower end of the side plate portion 4, and the lower end portion of the side plate portion 4 is a lower piece portion 8 which is continuous in the lateral direction. Since the lower end portion of the side plate portion 4 is the lower piece portion 8 that is continuous in the lateral direction, the strength is not reduced even though the knockout portion 6 and the opening 14 are provided in the side plate portion 4. Has become. That is, if the knockout opening 9 from which the knockout portion 6 is removed and the previously formed opening 14 are open at the lower end of the side plate portion 4 as shown in FIG.
Although it is easily deformed as indicated by the imaginary line, the lower piece 8 formed in the lower end portion of the side plate portion 4 in the lateral direction as in the present invention can be deformed even when a large load is applied from above as described above. It does not.

In the present invention, the closing plate 5 is formed by bending the side plate portion 4 obliquely downward from the front end of the flat plate portion 3 at an angle of less than 90 ° with respect to the flat plate portion 3 to form the closing plate 5. When the plate 5 is placed on the receiving edge 17 formed at the edge of the opening 2 of the floor panel 1 at the edge of the flat plate 3, the side plate is perpendicular to the flat plate 3 from the front end of the flat plate 3. 4, the center of gravity of the closing plate 5 is shifted inward from the corner portion of the flat plate portion 3 with the side plate portion 4, and as a result, the flat plate portion is shifted from the front end of the flat plate portion 3. The end of the flat plate portion 3 on the opposite side to the side plate portion 4 is less likely to float upward as compared with the case where the side plate portion 4 is vertically provided at right angles to the third plate portion 3.

The closing plate 5 is formed by bending the side plate portion 4 obliquely downward from the front end of the flat plate portion 3 at an angle of less than 90 ° with respect to the flat plate portion 3 as shown in FIG. In the case where another floor panel or another object 20 other than the floor panel is located next to the floor panel 1, the floor panel adjacent to the knockout opening 9 or the lower end of the opening 14 in the inclined side plate portion 4 portion, Alternatively, an opening shown by L in FIG. 9 can be formed between the side of the object 20 other than the floor panel and the electric wire without being obstructed by the adjacent floor panel or the side of the object 20 other than the floor panel. 10 can be passed through the knockout opening 9 and the opening 14. Further, when the opening 2 of the floor panel 1 and the opening 2 of the adjacent floor panel 1 are adjacent and continuous as shown in FIG.
In this case, the side plate portion 4 of the closing plate 5 is closed.
Although they contact each other at the upper end as shown in FIG. 10, the distance L 'between the lower ends of the knockout opening 9 and the opening 14 in the inclined side plate portion 4 is twice as long as the above L, and the electric wire 10 Through the knockout opening 9 and the opening 14.

In FIGS. 3 and 8, reference numeral 21 denotes a closing plate 5.
2 shows a flocking portion in which flocking has been performed on the outer surface of the.

[0022]

According to the first aspect of the present invention, as described above, the opening is formed so as to cut out at least one edge of the floor panel, and the opening is formed from the front end of the flat plate. The closing plate is formed by bending the side plate portion obliquely downward at an angle of less than 90 ° with respect to the flat plate portion, forming a knockout portion removable from the flat plate portion to the side plate portion, and forming an edge of the flat plate portion of the closing plate. Part is detachably mounted on the edge of the opening of the floor panel, so if the knockout part is removed, the knockout opening can be opened so as to face the outside of the floor panel, and Even when it is attached to the opening of the panel and the lid is kept closed, it can be pulled out from the outside of the floor panel through the knockout opening, and from the front end of the flat part to the flat part. The side plate is bent obliquely downward at an angle of less than 0 ° to form a closing plate, so that both ends of the closing plate are detachably locked to both side edges of the opening of the floor panel. Thus, the center of gravity of the closing plate can be shifted as far as possible from the corner portion of the closing plate as much as possible, so that the leading end side of the flat plate portion can be prevented from rising, and the closing plate can be stably Can close the opening. In addition, the distance between the lower end of the knockout opening in the inclined side plate portion and the side surface of the adjacent floor panel or another object other than the floor panel can be taken, and the distance between the adjacent floor panel and the floor panel other than the floor panel can be increased. The wire can be passed through the knockout opening without being obstructed by the side of another object.

According to the second aspect of the present invention, in addition to the effects of the first aspect of the present invention, two types of knockout sections for a communication system electric wire and a commercial power supply line are provided as knockout sections. Since it is provided, the communication system electric wire and the commercial power line can be separately extracted.
According to the third aspect of the present invention, in addition to the effect of the second aspect, a lower hole continuous with the knockout portion is provided below the side plate portion of the knockout portion for the commercial power supply line. Therefore, when knocking out the knockout part, the knockout part and the lower hole communicate with each other after the knockout part is removed, even though the area of the knockout part is reduced to facilitate knockout. The opening of the area can secure an opening area that does not hinder insertion of the commercial power supply line.

According to the fourth aspect of the present invention, in addition to the effects of the first to third aspects, the lateral width of the knockout portion is set to the maximum width at the bent portion. It cannot be removed from the front side even if a load is applied to the knockout part, and can be removed only when a load is applied to the knockout part from the rear side to form a knockout opening. There is no danger of being removed due to a load applied to the member.

According to a fifth aspect of the present invention, in addition to the effects of the first to fourth aspects, the knockout portion does not reach the lower end of the side plate portion. Since the lower end of the part is a lower piece that is continuous in the horizontal direction, the knockout part is provided to reach the side plate part and it opens to the outside of the floor panel, but the lower end part of the side plate part Is a lower piece portion that is continuous in the lateral direction, so that the strength of the side plate portion is increased and a large load can be withstood.

According to the sixth aspect of the present invention, in addition to the effects of the first aspect of the present invention, in addition to the knock-out portion, the pre-formed portion extending from the flat plate portion to the side plate portion is formed. Since the opening is provided, even when the knockout portion is not removed, the electric wire can be drawn out using the opening formed in advance from the flat plate portion to the side plate portion.

[Brief description of the drawings]

FIG. 1 is a perspective view of a state before an opening of a floor panel is closed with a closing plate according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state where an opening of the floor panel is closed with a closing plate.

FIGS. 3A and 3B show a closing plate used in the above, wherein FIG. 3A is a plan view, FIG. 3B is a front view, and FIG. 3C is a side view.

FIG. 4 is a partially exploded perspective view showing the whole of the same.

FIG. 5 is a cross-sectional view showing a state where the electric wire is drawn through the electric wire.

FIG. 6 is a perspective view showing a state before an opening of a floor panel is closed with a closing plate according to another embodiment of the present invention.

FIG. 7 is a perspective view showing a state where an opening of the floor panel is closed with a cover plate.

FIGS. 8A and 8B show a closing plate used in the above, wherein FIG. 8A is a plan view, FIG. 8B is a front view, and FIG. 8C is a side view.

FIG. 9 is a cross-sectional view of another example in a state where the electric wire is drawn through the electric wire.

FIG. 10 is a cross-sectional view of still another example of a state where the electric wire is drawn through the electric wire.

FIG. 11 is a perspective view showing a modification of the comparative example.

[Explanation of symbols]

 Reference Signs List 1 floor panel 2 opening 3 flat plate 4 side plate 5 closing plate 6 knockout 7 lower hole 8 lower piece 9 knockout opening 14 opening

Claims (6)

(57) [Claims] An opening is formed so as to cut out at least one edge of the floor panel, and the side plate is directed obliquely downward from the front end of the flat plate at an angle of less than 90 ° with respect to the flat plate. A closing plate is formed by bending, a knockout portion that can be removed from the flat plate portion to the side plate portion is formed, and an edge of the flat plate portion of the closing plate is removably mounted on an edge of an opening of the floor panel. A shielding structure for an opening in a floor panel. 2. The structure for shielding an opening of a floor panel according to claim 1, wherein said knockout portion comprises two types of knockout portions for a communication system electric wire and a commercial power supply line. 3. The shielding structure for an opening of a floor panel according to claim 2, wherein a lower hole continuous with the knockout portion is provided below the side plate portion of the knockout portion for a commercial power supply line. 4. The shielding structure for an opening of a floor panel according to claim 1, wherein the lateral width of the knockout portion is the maximum width at the bent portion. 5. The side plate portion according to claim 1, wherein the knockout portion does not reach the lower end of the side plate portion, and the lower end portion of the side plate portion is a lower piece that is continuous in the lateral direction. 3. The structure for shielding an opening of a floor panel according to item 1. 6. A pre-formed opening extending from a flat plate portion to a side plate portion is provided side by side with the knockout portion.
The shielding structure for an opening of a floor panel according to any one of the above.