JP2006124937A - Cover for receptacle box aperture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cover for a receptacle box aperture, in which a reinforcing piece exerting excellent structural strength is formed while using a thin metallic plate in order to achieve cost reduction. <P>SOLUTION: The cover 3 is provided for covering the receptacle box aperture 2 which is formed by caving a panel peripheral edge 11 of a floor panel 1, and detachably mounted on a low-stage surface 21 formed along an inner periphery of the receptacle box aperture 2. The cover 3 for the receptacle box aperture is formed of a metallic plane portion 31 and an external reinforcing piece 333. The external reinforcing piece 333 is formed by folding back an external plane portion 33 of the plane portion 31, and then folding the external contact surface portion 332 downward from an external contact surface portion 332 superposed on the external plane portion 33. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an outlet box that is detachably placed on a low step surface formed on the inner periphery of the outlet box opening so as to close the outlet box opening formed by denting the outer peripheral edge of the panel of the floor panel. It relates to a mouth lid.

  The free access floor is constructed by arranging a plurality of floor panels side by side in a state where they are floated at a predetermined interval from the foundation floor surface by supporting legs. A power cable or a communication cable is disposed in the underfloor space between the floor panel and the foundation floor surface. In order to pull out the power cable or the communication cable, a floor panel in which an outlet box port is formed by denting the outer peripheral edge of the panel is used for a part or all of the floor panel to be used. The outlet box port is sized or shaped to fit the outlet box, and is normally closed with a socket for outlet box port that is detachably mounted on a low step surface formed on the inner periphery of the opening of the outlet box port. The outlet box outlet lid may be provided with a through hole for drawing out the power cable or the communication cable with the outlet box outlet closed.

  Patent Document 1 proposes a cover for an outlet box mouth having an L-shaped cross section in which a single metal plate is bent to form a flat portion (upper surface portion) and a reinforcing piece (side flat surface portion). The flat surface portion forms a cover portion sandwiched between two slits extending at one end to the inner edge, and a through hole can be appropriately formed by bending the cover portion downward. Further, Patent Document 2 is provided with a through hole (hole or notch) that is blocked by a low step surface (falling step portion) in a flat surface portion (a plate of a flat plate), and a position that allows the through hole to communicate with an underfloor space. It proposes a cover for outlet box mouth that can be attached to the outlet box mouth by changing. Instead of the reinforcing piece, a bulging portion (rib) having an outer shape similar to the flat portion protrudes downward.

JP 2000-240263 A (pages 2 to 4, FIGS. 1 to 4) Utility Model Registration No. 2569387 (pages 2 to 3, FIG. 1 and FIG. 4, FIG. 16 and FIG. 17)

  The reinforcing piece of the outlet box mouth lid of Patent Document 1 is merely a bend of a metal plate continuous from the flat surface. Here, since it is said that the metal plate used as the material for the outlet box mouth cover is preferably as thin as possible from the viewpoint of cost reduction or the like, the reinforcing piece of the outlet box mouth lid of Patent Document 1 is structurally sufficient. Strength cannot be secured. In addition, when the outlet portion for the outlet box mouth is bent when forming the through hole, the strength is lowered, and the lid portion may be broken due to fatigue failure. The outlet for the outlet box cover is broken, and it is easy to damage the power cable or communication cable (hereinafter referred to as a cable) that is pulled out due to the occurrence of burrs. As a result, the problem arises that the heels of high heels are fitted.

  The lid for the outlet box mouth of Patent Document 2 is provided with a pre-processed wire opening so that there is no burr problem, and it can usually be closed by a low step surface, so that a high heel heel fits into it. There is an advantage that can avoid the problem. However, the lid for the outlet box mouth of Patent Document 2 can form a bulging portion corresponding to a reinforcing piece because of an integral structure made of, for example, resin or aluminum die cast. However, there is a problem that such a bulging portion cannot be substantially formed.

  Therefore, in order to reduce the cost, the lid for the outlet box mouth is manufactured by bending the metal plate, and the outlet box mouth lid is formed with a reinforcing piece that provides excellent structural strength while using a thin metal plate. ,investigated.

  As a result of the study, the product developed was designed to close the outlet box port formed by denting the outer peripheral edge of the floor panel, so that it can be detachably mounted on the lower step surface formed on the inner periphery of this outlet box port opening. The outlet box mouth cover is composed of a flat portion and a reinforcing piece made of a metal plate, and the reinforcing piece is folded below a contact surface portion that is partly folded and overlapped with the flat portion. It is a cover for the outlet box mouth formed by bending it. As a result, the reinforcing piece is always formed by bending downward from directly below the flat portion that is biased inward from the edge of the flat portion, and the section modulus at the portion where the reinforcing piece is formed can be increased.

  Specifically, the planar portion includes an inner edge that follows the outline of the outlet box port in plan view, includes an inner plane portion that rests on the lower step surface, and a side edge that conforms to the outer shape of the outlet box port in plan view. It consists of a side plane part that rests on the surface and an outer plane part that does not rest on the lower step surface, including an outer edge that continues to the outer periphery of the panel of the floor panel, and the reinforcing piece crosses the outer folding line corresponding to the outer edge of the outer plane part An outer reinforcing piece formed by folding the circumscribed surface portion downward with the outer folding line as an axis and overlapping the outer flat surface portion, and bending the circumscribed surface portion downward with a width that fits within the inner periphery of the lower step surface, In order to compensate for the step between the circumscribed surface portion and the inner flat surface portion or the side flat surface portion, the inscribed surface portion extending beyond the inner folded line corresponding to the inner edge of the inner planar surface portion is folded downward with the inner folded line as an axis. Shows a cover for outlet box mouth configured to overlap the inner flat part It is possible.

  The inner plane portion of the plane portion is a portion of the plane portion including the inner edge (= inward in the orthogonal direction of the panel outer periphery and parallel to the panel outer periphery), and the outer plane portion is the outer edge (= orthogonal of the panel outer periphery). The portion of the flat portion including the side edge (= the peripheral edge facing the orthogonal direction of the panel outer periphery) and the side flat portion including the portion of the flat portion including the side edge (= the peripheral edge facing the orthogonal direction of the panel outer periphery) Each means. These inner plane part, side plane part, and outer plane part are functionally divided, and there is no physical or structurally distinct division, and the inner plane part, the side plane part, and the outer plane part are all integrated. One plane part is constituted. Specific examples of the plane portion include an inner edge of the inner plane portion, an outer edge of the outer plane portion, and a plane portion having a substantially quadrilateral shape in a plan view in which both side edges of the both side plane portions are straight lines.

  In addition, the “superposition” of the outer surface portion and the outer surface portion means, for example, that the outer surface portion and the folded outer surface portion are substantially parallel, and the distance between the upper surface of the outer surface portion and the lower surface of the folded outer surface portion is the outlet. It means a structure that is substantially equal to the depth of the low step surface formed on the inner periphery of the opening of the box opening. Normally, the outer plane and the outer surface have the same thickness of 1/2 or less of the lower surface, and if the thickness of the outer surface and the outer surface is equal to 1/2 of the depth of the lower surface, the outer surface The outer surface portion and the outer surface portion are in close contact with each other, and if the plate thickness of the outer surface portion and the outer surface portion is less than 1/2 of the depth of the low step surface, the outer surface portion and the outer surface portion are parallel with an insufficient thickness. This overlapping structure is the same for the inner plane portion and the inscribed surface portion. Thereby, the cover for outlet box mouths of this invention can arrange | equalize with a floor panel.

  In the outlet box mouth cover, the outer reinforcing piece has a function of increasing the section modulus of the outer flat surface portion. Further, in order to compensate for the step between the circumscribed surface portion and the inner plane portion or the side plane portion, the inscribed surface portion superimposed on the inner plane portion also has an increased section modulus. Here, since the outer reinforcing piece is formed by bending from the circumscribed surface portion with a width that fits in the inner periphery of the lower step surface, the outer reinforcing piece is equalized with the width of the outer reinforcing piece and the interval of the inner periphery of the lower step surface. Can be used as a positioning member for the extending direction of the outer peripheral edge of the panel. The outer reinforcing piece is preferably bent as long as possible by bending downward in the orthogonal direction of the circumscribed surface portion from the viewpoint of increasing the section modulus. However, when the length protrudes from the bottom surface of the floor panel, for example, when the floor panels overlap each other, the outer reinforcing piece of the outlet box mouth lid attached to the upper floor panel contacts the lower floor panel, etc. There is a risk of injury. For this reason, the length of the outer reinforcing piece is preferably such that the lower end is slightly above the bottom surface of the floor panel.

  The present invention can be configured in addition to the outlet box mouth lid. That is, while the plane portion is the same as described above, the reinforcing piece is folded downward with the outer return line corresponding to the outer edge of the outer plane portion over the outer return line, and is overlapped on the outer plane portion. In addition, it is an outer reinforcing piece formed by bending the circumscribed surface portion downward with a width that fits within the inner periphery of the lower step surface, and in order to compensate for the step between the circumscribed surface portion and the inner planar portion or the side planar portion, A configuration in which the flat surface portion is stepped downward to form an inscribed surface portion or a side contact surface portion that is flush with the circumscribed surface portion, or the reinforcing piece has a circumscribed surface portion that projects beyond the outer return line corresponding to the outer edge of the outer flat surface portion. The outer reinforcing piece formed by bending the outer folding line downward and overlapping the outer flat surface portion, and folding the circumscribed surface portion downward with a width that fits within the inner periphery of the lower step surface, and the inner edge of the inner flat surface portion The inscribed surface part that extends beyond the inner return line is the axis of the inner return line. Was superposed on the inner flat surface portion is folded downwardly, it may be further configured with at the reinforcing piece inner formed by bending the inscribed surface downward with a width that fits the inner periphery of the low-stage surface.

  The inner reinforcing piece is formed by bending the inscribed surface portion downward with a width that fits in the inner periphery of the lower step surface. Therefore, if the width of the outer reinforcing piece matches the interval of the inner periphery of the lower step surface, the inner reinforcing piece Can be used as a positioning member for the extending direction of the outer peripheral edge of the panel. Furthermore, in the outlet box mouth lid in which the inner reinforcing piece is formed, when the inner reinforcing piece is formed by bending the inscribed surface portion downward from a position substantially in contact with the inner periphery of the lower step surface, the inner reinforcing piece is It can be used as a positioning member with respect to the extending orthogonal direction. It is preferable that these inner reinforcing pieces have such a length that the lower end is slightly above the bottom surface of the floor panel, based on the above description of the outer reinforcing pieces.

  The lid for the outlet box mouth is usually provided with a wiring port through which a cable or the like is inserted. If this wiring port is provided in the inner flat surface part in a size or shape that is completely or partially blocked by the lower step surface formed on the inner periphery of the outlet box port opening, the inner flat surface portion becomes the lower step surface. It is blocked in the loaded state, and can be connected for the first time in a state where the outer flat part is placed on the low step surface. The flat portion of the outlet box mouth lid that realizes such a wire opening has a point-symmetric shape in plan view formed by the inner edge of the inner flat surface portion, the outer edge of the outer flat surface portion, and both side edges of the both side flat surface portions, The outer reinforcement piece in a state in which the flat plate portion is horizontally rotated 180 degrees from the state in which the inner flat surface portion is placed on the lower step surface (hereinafter, normal state) and the outer flat surface portion is placed on the lower step surface (hereinafter referred to as the wiring state) The outer reinforcing piece may be formed by bending the circumscribed surface portion downward from a position substantially in contact with the inner periphery of the low step surface. Thereby, an outer reinforcement piece can be used as a positioning member with respect to the extension orthogonal direction of a panel outer periphery.

  The flat part of the outlet box outlet cover for switching between the normal state and the line connection state may be formed by cutting out the overlapped inner flat surface part and inscribed surface part integrally. In this case, the planar portion has a substantially quadrilateral shape in plan view in which the inner edge of the inner plane portion, the outer edge of the outer plane portion, and both side edges of both side plane portions are straight lines, and the outer shape in plan view can be made point-symmetric. . More specifically, the inner plane portion and the inscribed surface portion straddling the inner return line corresponding to the inner edge of the inner plane portion at the stage where the inner plane portion and the inscribed surface portion before folding the inscribed surface portion are on the same plane. After punching to form an opening and chamfering the upper peripheral edge of the opening, the inscribed surface portion is folded downward with the inner folding line as an axis and overlapped with the inner surface portion, so that the inner surface portion is inscribed. It is good to make it the through-line opening which formed the closed annular chamfering periphery folded over. If only the upper peripheral edge of the opening is chamfered, both the upper and lower sides are chamfered as a through hole, and it is possible to prevent the power cable or the communication cable drawn out through this through hole from being damaged. The chamfering of the upper peripheral edge of the opening can be simultaneously formed by press working for forming the opening.

  In addition, the flat portion of the outlet box port lid that switches between the normal state and the line connection state may be formed by notching the stepped inner flat surface portion to form an internal line opening. In this case, the planar portion can have a point-symmetrical shape in plan view with the inner edge of the inner plane portion, the outer edge of the outer plane portion, and the both side edges of both side plane portions being substantially quadrilateral in plan view. In addition, if it is a plane part that does not switch between the normal state and the line connection state, the inner edge of the inner plane part and the both side edges of the both side plane parts are arcs or elliptical arcs that are continuous, and the outer edge of the outer plane part is a straight fan in a plan view. It may be. In addition, the flat part of the outlet box outlet lid may be formed by cutting out the overlapped outer flat part and circumscribed surface part integrally to form a through hole. In this case, a preferable through hole is formed by connecting the outer plane portion and the outer surface portion across the outer return line corresponding to the outer edge of the outer plane portion when the outer plane portion and the outer surface portion before the circumscribed surface portion are folded on the same plane. After punching to form an opening and chamfering the upper peripheral edge of this opening, the outer surface is folded back around the outer folding line and overlapped with the outer surface, thereby folding back from the outer surface to the outer surface. A closed annular chamfered edge is formed.

  According to the present invention, by forming the reinforcing piece directly below the flat surface portion, the section modulus of the flat surface portion can be increased, and the cover for the outlet box mouth having high structural strength while using a thinner metal plate for cost reduction. The effect that can be provided. In addition, even if it is a cover for an outlet box mouth made of a metal plate thinner than the step on the low step surface by overlapping the flat portion and the contact surface portion to form a reinforcing piece, the surface of the flat portion is the surface of the floor panel. There is an effect that can be made substantially flush. In addition, the through-holes formed in the overlapped inner plane part and inscribed surface part do not cause a decrease in the structural strength in the inner plane part, and are chamfered vertically by a single press process or the like. A through hole can be formed, and there is an effect that a power cable or a communication cable to be pulled out can be prevented from being damaged.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the relationship between the outlet box mouth lid 3 and the floor panel 1 according to the present invention. FIG. 2 is a perspective view of the floor panel 1 in which the outlet box mouth lid 3 is placed on the low step surface 21 in a standard state. 3 is an enlarged cross-sectional view taken along the line AA in FIG. 2, FIG. 4 is an enlarged cross-sectional view taken along the line BB in FIG. 2, and FIG. FIG. 6 is an enlarged cross-sectional view taken along the line CC in FIG. 5, FIG. 7 is a perspective view of the outlet box mouth lid 3 as viewed from the front side, and (b) a perspective view as viewed from the back side. 8 and 9 are perspective views showing different usage modes of the outlet box mouth cover 3, 3, and FIG. 10 is a perspective view showing a procedure for forming the internal wiring port 325 of the outlet box mouth lid 3. .

  The floor panel 1 of this example is a square in plan view, and as shown in FIG. 1, outlet box ports 2 for attaching outlet boxes and the like are provided on two opposite sides of the panel outer peripheral edge 11. The outlet box port 2 can be freely set in size or shape in accordance with the outlet box to be mounted. The outlet box port 2 of this example has a substantially rectangular shape in a plan view in which the width in the extending orthogonal direction of the panel outer peripheral edge 11 is about half the length of the panel outer peripheral edge 11 in the extending direction. Thus, when the adjacent floor panels 1 and 1 are arranged in a positional relationship where the outlet box ports 2 abut each other, an opening having a substantially square shape in plan view can be formed by both outlet box ports 2 and 2. This has the advantage of being able to select the size of the outlet box that can be installed. The low step surface 21 is a flange formed along the inner periphery of the opening of the outlet box port 2 and is formed with a constant width from the inner periphery of the opening. When the outlet box or the like is not attached, the outlet box port 2 is closed by placing the outlet box port lid 3 on the lower surface 21.

  As shown in FIG. 2, the outlet box mouth lid 3 of this example includes a flat portion 31 and an outer reinforcing piece 333. The plane portion 31 can be divided into an inner plane portion 32 including an inner edge 321, an outer plane portion 33 including an outer edge 331, and side plane portions 34 and 34 including side edges 341 and 341. As shown in FIG. 3, the circumscribed surface portion 332 is a portion that protrudes beyond the outer edge 331 corresponding to the outer return line of the outer plane portion 33, and is folded downward from the outer plane portion 33 with the outer edge 331 as an outer return line, It is superimposed on the back side of the outer flat surface portion 33. The outer reinforcing piece 333 is formed to be bent downward in the vertical direction with a width that fits from the circumscribed surface portion 332 to the inner periphery of the low step surface 21. Similarly, the inscribed surface portion 322 is a portion that protrudes beyond the inner edge 321 corresponding to the inner return line of the inner plane portion 32, and is folded downward from the inner plane portion 32 with the inner edge 321 as an outer return line. It is layered on the back side. The inner wire opening 325 is formed by integrally cutting the overlapped inner flat surface portion 32 and inscribed surface portion 322.

  As shown in FIGS. 6, 7, and 10, the inner passage opening 325 is a horseshoe-shaped opening in which the overlapped inner plane portion 32 and inscribed surface portion 322 are cut out integrally. The inner passage opening 325 of this example forms a closed annular chamfered peripheral edge 327 that is folded back from the inner flat surface portion 32 to the inscribed surface portion 322. As will be described later, the inner through hole 325 formed with the chamfered peripheral edge 327 is formed at the same time when a long hole (open hole) 326 to be the inner through hole 325 is punched out by pressing. The chamfered peripheral edge 327 prevents the cable passing through the inner passage opening 325 from being damaged by rubbing.

  As shown in FIG. 2, the inner flat surface portion 32 is placed on the lower step surface 21 via the inscribed surface portion 322. On the other hand, the outer flat surface portion 33 is not placed on the lower step surface 21. For this reason, the structure of the outer flat surface portion 33 and the outer surface portion 332 that are overlapped with each other and the outer reinforcing piece 333 that is lowered from the outer surface portion 332 increases the section modulus, and for example, a load is applied to the outlet box mouth lid 3. The bending of the outer flat surface portion 33 is suppressed. As shown in FIG. 3, the outer reinforcing piece 333 has a length slightly smaller than the thickness of the floor panel 1. For example, when the floor panel 1 fitted with the outlet box mouth lid 3 is stacked, the upper floor panel 1 It is desirable that the outer reinforcing piece 333 in the outlet box mouth lid 3 is not in contact with the lower floor panel 1.

  Further, the outer reinforcing piece 333 of the present example is formed by bending downward further from the circumscribed surface portion 332 that is folded downward and overlapped with the back side of the outer flat surface portion 33, so that the outer edge 331 is orthogonal to the panel outer peripheral edge 11. It is a little inside (from the outer edge 331). Since both ends of the circumscribed surface portion 332 are placed on the lower step surface 21, the load applied on the outer reinforcing piece 333 can be efficiently transmitted to the floor panel 1 via the lower step surface 21. As a result, the effect of suppressing the bending of the outlet box mouth lid 3 alone can be obtained, and the cost can be reduced by reducing the thickness of the metal plate used.

  In order to realize stable placement on the floor panel 1, the outlet box mouth lid 3 of this example has a pair of protrusions 342, 342 cut and raised from the side plane portions 34, 34 protruding downward. As shown in FIG. 4, the protrusions 342 and 342 are inclined in the extending direction of the panel outer peripheral edge 11 so as to have a “C” -shaped relationship that gradually spreads downward. Accordingly, the outlet box port lid 3 engages the pair of protrusions 342 and 342 with the inner periphery of the lower step surface 21 to prevent the lower step surface 21 from being lifted, and the outlet box port lid with respect to the outlet box port 2. The mounting stability of 3 is improved. At this time, it is preferable that the outer surface is formed in an inclined surface so that the tip of the protrusion 342 is tapered, and the press-fitting work into the outlet box port 2 is facilitated. Further, in order to provide the projections 342 and 342 with a positioning function with respect to the outlet box cover 3, a pair of engagement recesses (see FIGS. 16 to 18 described later) corresponding to the projections 342 and 342 are provided on the inner periphery of the low step surface 21. And the protrusions 342, 342 may be engaged.

  The plane portion 31 in this example is a substantially quadrilateral shape in a plan view in which the inner edge 321 of the inner plane portion 32, the outer edge 331 of the outer plane portion 33, and both side edges 341 and 341 of the side plane portions 34 and 34 are straight lines, respectively, and point-symmetric It has become. Thereby, the attachment state with respect to the outlet box port 2 of the outlet box port lid 3 is achieved by changing the positions of the inner flat surface portion 32 provided with the inner wiring ports 325 and 325 and the outer flat surface portion 33 without the wiring port. Standard state and line state can be selected. The outlet box mouth lid 3 of this example is provided with two horseshoe-shaped inner passage ports 325 and 325 symmetrically on the inner plane portion 32. Here, the inner wiring port 325 is necessary and sufficient as long as the cable C1 having a diameter of 13 mm can be pulled out. Of course, the internal wiring port 325 forms a step with respect to the inner flat surface portion 32, but is usually covered with a surface finishing material (not shown) made of carpet or the like attached to the surface of the floor panel 1. The step does not become a problem. In addition, as shown in FIG. 2, the inner wiring port 325 has two inner wiring ports 325 in the standard state in which the outer flat surface portion 33 and the panel outer peripheral edge 11 of the floor panel 1 are aligned on the same line. The low step surface 21 is almost closed. Here, when the depths of the internal passage openings 325 and 325 are increased, the internal passage opening 325 protrudes beyond the low step surface 21, and a portion that is only covered with a carpet or the like is formed. In this case, the protruding length of the internal passage opening 325 from the low step surface 21 is preferably suppressed to 8 mm or less so that there is no risk that the heel of the high heel breaks through the carpet or the like.

  As shown in FIG. 5, the outlet box mouth cover 3 is rotated 180 degrees in the horizontal plane from the standard state (see FIG. 2) so that the outlet box mouth cover 3 Align the inner edge 321 of the inner plane part 32 having the inner passage opening 325 and the panel outer peripheral edge 11 of the floor panel 1 on the same line, and place the outer plane part 33 and both side plane parts 34, 34 on the lower step surface 21. Put. As a result, as seen in FIG. 6, both the internal connection ports 325 and 325 that are removed from the lower step surface 21 are completely opened, and the cable C1 having a diameter of 13 mm can be inserted. Here, the outer reinforcing piece 333 of the present example is formed with a width that fits in the inner periphery of the low step surface 21 even in this line-connected state, and further on the inner periphery of the low step surface 21 as seen in FIG. The circumscribed surface portion 332 is formed by bending downward from a position where it substantially contacts. For this reason, the outer reinforcing piece 333 can be used as a positioning member for the outlet box mouth lid 3 with respect to the extending direction and the orthogonal direction of the panel outer peripheral edge 11 when the outlet box mouth lid 3 is attached in a through-wire state.

  In this example, a standard state in which the outer flat surface portion 33 is aligned with the panel outer peripheral edge 11 and a wiring state in which the inner flat surface portion 32 in which the inner wiring port 325 is formed are aligned with the panel outer peripheral edge 11 are selected, and the outlet box port The lid 3 can be placed on the lower surface 21 of the outlet box port 2. Here, the surface of the outlet box cover 3 is horizontal in either the standard state or the line state in which the outlet box opening cover 3 is placed on the lower surface 21 and the outlet box opening 2 is closed. It is desirable to be flush with the surface of the floor panel 1. However, the depth of the low step surface 21 with respect to the surface of the floor panel 1 is relatively deep due to the requirement of an outlet box to be attached, and is usually about 5 mm. On the other hand, the outlet box cover 3 can satisfy the required strength even if a thin metal plate is used, and can be made from a metal plate having a thickness of about 2 mm (for example, about 2.3 mm) practically. In this case, if the metal plate having the thickness is used as it is for the flat portion 31, there arises a problem that the surface of the outlet box mouth lid 3 becomes lower than the surface of the floor panel 1. The present invention solves the above problem by overlapping the outer flat surface portion 33 and the circumscribed surface portion 332 and by overlapping the inner flat surface portion 32 and the inscribed surface portion 322. Here, when the outlet box cover 3 is made of a metal plate having a thickness of 2.3 mm, the outer flat surface portion 33 and the outer surface portion 332, and the inner flat surface portion 32 and the inner surface portion 322 have a gap of 0.4 mm. If they are overlapped, the depth of the lower step surface 21 is equal to 5 mm.

  The lid 3 for the outlet box mouth of this example is placed at a standard position where the inner passage opening 325 is closed by the lower step surface 21, and the flat portion 31 is inverted 180 degrees in the horizontal plane to lower the inner passage opening 325. It is possible to select and use three modes: mounting at the position of the line that opens from the surface 21 and removal from the outlet box port 2. Here, as shown in FIG. 8, the normal free access floor is laid while abutting both outlet box ports 2, 2 of the floor panels 1, 1. From this, the usage mode of the said outlet box mouth cover 3 increases by the combination of each 3 aspect of the paired outlet box mouth lids 3 and 3 which faced.

  In a normal free access floor, as shown in FIG. 8, the floor panels 1 and 1 are laid while the outlet box ports 2 and 2 face each other. In this case, if the outlet box mouth cover 3 (front side in FIG. 8) of one floor panel 1 is in a wiring state and the other outlet box mouth cover 3 (back side in FIG. 8) is in a standard state. The inner wiring port 325 of one outlet box port lid 3 opens in a state of being in contact with the outer edge 331 of the other outlet box port lid 3. For example, a single table tap cable C1 having a diameter of 13 mm can be passed through the inner wiring port 325. On the other hand, if both the outlet box opening lids 3 and 3 are connected, the inner connection openings 325 and 325 of the outlet box opening lids 3 and 3 face each other as shown in FIG. The aperture is substantially twice as large. In addition to the two table tap cables C1 having a diameter of 13 mm, the connected inner wiring ports 325 and 325 can also pass eight coaxial cables C2 having a diameter of 6 mm (only two are illustrated).

  As described above, the outlet box port lid 3 of the present example forms a closed annular chamfered peripheral edge 327 that is folded back from the inner plane surface 32 to the inscribed surface portion 322 at the inner passage port 325 (FIG. 6). And FIG. 7). Usually, in the case of a wire opening formed by cutting out a metal plate, the upper edge and the lower edge of the through hole formed by cutting out are individually pressed and pressed in order to chamfer the chamfered edge 327. There was a problem which made the manufacturing process complicated. On the other hand, in the present invention, the chamfered peripheral edge 327 is formed simultaneously with the formation of the long hole (open hole) 326 that becomes the internal passage opening 325. FIG. 10 shows a procedure for forming the inner through hole 325 for forming the chamfered peripheral edge 327 at the same time. The inner plane part 32 and the inscribed surface part 322 straddle the inner return line corresponding to the inner edge 321 of the inner plane part 32 when the inner plane part 32 and the inscribed surface part 322 before the inscribed surface part 322 are folded back are on the same plane. Is punched out by press pressing to form a long hole 326. At the same time, the upper peripheral edge of the long hole 326 is chamfered, and then the inner surface 322 is folded downward about the inner folding line (BL = bend line) as an inner plane. By overlapping the portion 32, an internal line port 325 in which a closed annular chamfered peripheral edge 327 is formed that is folded back from the inner plane portion 32 to the inscribed surface portion 322 can be formed.

  FIG. 11 is a perspective view of another example of the outlet box mouth lid 3, FIG. 12 is a plan view of the floor panel 1 in which the other outlet box mouth lid 3 is placed on the low step surface 21 in a standard state, and FIG. 12 is an enlarged cross-sectional view taken along the line DD, FIG. 14 is a plan view of the floor panel 1 placed on the lower step surface 21 in a state where the lid 3 for the outlet box mouth of the other example is in a wired state, and FIG. -E is an enlarged sectional view. The outlet box lid 3 of this example is basically the same in structure and configuration as the above-described example, but has the same configuration as the superposition of the outer flat surface portion 33 and the outer surface portion 332 on which the outer reinforcing piece 333 is formed. An inner reinforcing piece 323 is further formed by using the overlapping of the inner plane portion 32 and the inscribed surface portion 322.

  In order to increase the structural strength of the outlet box cover 3, for example, as shown in FIGS. 11 and 13, in addition to the outer reinforcing piece 333, an inner reinforcing piece 323 bent downward from the inscribed surface portion may be formed. . The inner reinforcing piece 323 is preferable to reinforce the inner flat surface portion 32 that cannot avoid a decrease in strength due to the inner passage opening 325. In this case, in the standard state shown in FIGS. 12 and 13, the inner reinforcing piece 323 is formed by bending the inscribed surface portion 322 downward from a position where the inner reinforcing piece 323 substantially contacts the inner periphery of the lower step surface 21, and the lower step surface 21. The inner reinforcing piece 323 functions as a positioning member with respect to the extending direction and the orthogonal direction of the panel outer peripheral edge 11 when the outlet box mouth cover 3 is attached in a standard state. Further, in the through-line state shown in FIG. 14 and FIG. 15, the point that the inner reinforcing piece 323 can reinforce the inner flat surface portion 32 that is not placed on the low step surface 21 is a great advantage. Since the inner reinforcement piece 323 is close to the inner passage opening 325, the inner reinforcement piece 323 is not damaged by the cable C1 passing through the inner passage opening 325 being rubbed against the lower edge of the inner reinforcement piece 323. A curled portion 324 is formed by folding the lower end of 323 upward. Although it is conceivable to chamfer the lower end of the inner reinforcing piece 323 instead of the curled portion 324, the smooth curved surface of the curled portion 324 is less likely to damage the cable C1 and has higher safety.

  FIG. 16 is a plan view of the floor panel 1 in which another socket 3 for the outlet box mouth is placed on the low step surface 21 in a standard state, FIG. 17 is an enlarged cross-sectional view taken along line FF in FIG. It is the perspective view of the floor panel 1 showing the positional relationship at the time of mounting on the low step surface 21 in the state of the passage 3 of the outlet box mouth of another example. The cover 3 for the outlet box mouth of this example is the same as the above-described example in that the outer reinforcing portion 333 is formed by superimposing the outer flat surface portion 33 and the outer surface portion 332, but the outer shape in plan view is that of the inner flat surface portion 32. The inner edge 321 and both side edges 341, 341 of both side plane parts 34, 34 are continuous arcs, and the outer edge 331 of the outer plane part 33 is substantially semicircular in a straight plan view, from the continuous inner plane part 32 to the side plane part 34, An inscribed surface portion 328 or side surface portions 343 and 343 that are flush with the circumscribed surface portion 332 are formed by stepping the periphery of the portion 34 downwardly.

  As shown in FIGS. 16 to 18, the outlet box cover 3 according to the present example has a substantially semicircular shape in plan view, so that it cannot be reversed between the horizontal state and the standard state and the line state. . For this reason, the internal wiring port 325 formed in the stepped inscribed surface portion 328 has a depth exceeding the low step surface 21, and is normally opened to the extent that one cable C1 having a diameter of 13 mm can be inserted. Yes. In addition, a pair of protrusions 342 and 342 cut and raised from the side plane portion are also protruded downward in the outlet box mouth lid 3 of this example. The protrusions 342 and 342 in this example have a function of improving the mounting stability in the above-described example, but the meaning of the positioning function is large in addition to the above function. For this reason, a pair of engaging recesses 211 and 211 corresponding to the protrusion 342 are formed on the inner periphery of the low step surface 21, and the protrusions 342 and 342 are engaged.

It is a perspective view showing the relationship between the cover for outlet box mouths of this invention, and a floor panel. It is a top view of the floor panel which mounted the cover for outlet box mouths on the low level surface in the standard state. It is an AA expanded sectional view in FIG. It is BB expanded sectional drawing in FIG. It is a top view of the floor panel mounted in the low step surface in the state where the cover for outlet box mouths was passed. It is CC expanded sectional drawing in FIG. It is the perspective view seen from (I) front side of the cover for outlet box mouths, and (B) the perspective view seen from the back side. It is a perspective view showing the different utilization aspect of the socket for outlet box mouths. It is a perspective view showing the different utilization aspect of the socket for outlet box mouths. It is a perspective view showing the formation procedure of the internal wire opening of the cover for outlet box mouths. It is a perspective view of another example outlet cover lid. It is a top view of the floor panel which mounted the cover for outlet socket mouths of another example on the low level surface in the standard state. FIG. 13 is an enlarged sectional view taken along line DD in FIG. It is a top view of the floor panel mounted in the low-stage surface in the state of the passage for another outlet box mouth cover. It is EE expanded sectional drawing in FIG. It is a top view of the floor panel which mounted the cover for outlet socket mouths of another example on the low level surface in the standard state. It is FF expanded sectional drawing in FIG. It is the perspective view of the floor panel showing the positional relationship at the time of mounting on the low-stage surface in the state of a through-wire state lid | cover for another example.

Explanation of symbols

1 Floor panel
11 Panel peripheral edge 2 Outlet box port
21 Low step 3 Cover for outlet box
31 Plane section
32 inner plane
321 Inner edge
322 Inscribed surface
323 Inner reinforcement piece
325 Inner Line
327 Chamfered edge
328 Inscribed surface
33 External plane
331 outer edge
332 External surface
333 Outer reinforcement piece
34 Side plane
341 side edge
343 Side contact surface
C1 13mm diameter cable
C2 6mm diameter cable

Claims (8)

In order to close the outlet box opening formed by denting the outer peripheral edge of the floor panel, the outlet box opening lid is detachably placed on the lower step surface formed on the inner periphery of the outlet box opening. The lid for the outlet box mouth is composed of a flat portion made of a metal plate and a reinforcing piece, and the reinforcing piece is formed by folding back a part of the flat portion and bending it downward from a contact surface portion superimposed on the flat portion. The outlet box lid. The plane portion includes an inner edge that follows the outline of the outlet box port in plan view, and includes an inner plane portion that rests on the lower surface and a side edge that conforms to the outer shape of the outlet box port in plan view. And an outer plane part that includes an outer edge that is continuous with the outer peripheral edge of the panel of the floor panel and does not rest on the lower step surface, and the reinforcing piece extends beyond the outer folding line corresponding to the outer edge of the outer plane part Is an outer reinforcing piece formed by folding downward on the outer fold line as an axis, overlapping the outer flat surface portion, and bending the outer surface portion downward with a width that fits within the inner periphery of the lower step surface. In order to compensate for the level difference with the flat surface portion or the side flat surface portion, the inscribed surface portion that protrudes beyond the inner fold line corresponding to the inner edge of the inner flat surface portion is folded downward with the inner fold line as an axis to overlap the inner flat surface portion. The lid for an outlet box mouth according to claim 1 combined. The plane portion includes an inner edge that follows the outline of the outlet box port in plan view, and includes an inner plane portion that rests on the lower surface and a side edge that conforms to the outer shape of the outlet box port in plan view. And an outer plane part that includes an outer edge that is continuous with the outer peripheral edge of the panel of the floor panel and does not rest on the lower step surface, and the reinforcing piece extends beyond the outer folding line corresponding to the outer edge of the outer plane part Is an outer reinforcing piece formed by folding downward on the outer fold line as an axis, overlapping the outer flat surface portion, and bending the outer surface portion downward with a width that fits within the inner periphery of the lower step surface. 2. The outlet box according to claim 1, wherein in order to compensate for a step with the flat surface portion or the side flat surface portion, the internal flat surface portion or the side flat surface portion is stepped downward to form an inscribed surface portion or a lateral surface portion that is flush with the external surface portion. Mouth lid. The plane portion includes an inner edge that follows the outline of the outlet box port in plan view, and includes an inner plane portion that rests on the lower surface and a side edge that conforms to the outer shape of the outlet box port in plan view. And an outer plane part that includes an outer edge that is continuous with the outer peripheral edge of the panel of the floor panel and does not rest on the lower step surface, and the reinforcing piece extends beyond the outer folding line corresponding to the outer edge of the outer plane part The outer reinforcement piece formed by bending the outer fold line downward and overlapping the outer flat surface portion, and folding the circumscribed surface portion downward with a width that fits within the inner circumference of the lower step surface, and the inner edge of the inner flat surface portion. The inscribed surface part that extends beyond the corresponding inner return line is folded downward with the inner return line as an axis and overlapped with the inner flat surface part, and the inscribed surface part is bent downward with a width that fits within the inner circumference of the lower step surface. 2. The outlet box according to claim 1, wherein Scan ports for the lid. 5. The outlet box cover according to claim 4, wherein the inner reinforcing piece is formed by bending the inscribed surface portion downward from a position substantially in contact with the inner periphery of the low step surface. The flat plate portion has a point-symmetric shape in plan view formed by the inner edge of the inner flat surface portion, the outer edge of the outer flat surface portion, and both side edges of the both side flat surface portions, and is flat when the inner flat surface portion is placed on a low step surface. The outer reinforcement piece is bent downward from the position where the outer reinforcement piece is substantially in contact with the inner periphery of the lower step surface, with the outer plane portion rotated horizontally by 180 degrees and the outer plane portion is placed on the lower step surface to form the outer reinforcement piece. The cover for outlet box mouths in any one of Claims 2-4. 5. The outlet box mouth cover according to claim 2, wherein the flat surface portion is formed by integrally notching the overlapped inner flat surface portion and inscribed surface portion to form an internal wire opening. 4. The cover for an outlet box mouth according to claim 3, wherein the flat surface portion is formed by cutting out the stepped inner flat surface portion to form an internal wiring port.

Images