JP2011184867A - Scaffolding board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a scaffolding board wherein a baseboard integrally connects to a scaffolding board body and the baseboard can be housed compactly when it is not used and the baseboard is used without causing a clearance with the scaffolding board and without narrowing passage width. <P>SOLUTION: The scaffolding board includes: a scaffolding board body 3; freely foldable plate type baseboards 20a and 20b each having a side cover covering a clearance with a side face part 8 of the scaffolding board body; and connectors 40a and 40b connecting the baseboards 20a and 20b to the scaffolding board body 3 to raise/house them on/in the side face parts 8 and 9 of the scaffolding board body. In using the baseboards 20a and 20b, they are raised on the side face parts 8 and 9 of the scaffolding board body. The baseboards 20a and 20b are housed in the side face part 8 and 9 of scaffolding board body when the baseboards 20a and 20b are not used. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a scaffold board in which a skirting board is integrated with a scaffold board body and in which the skirting board can be stored.
In the present invention, unless otherwise specified, the side surface of the scaffold board main body refers to the side surface in the longitudinal direction, and the front or rear of the scaffold board main body refers to either the left or right when the longitudinal side surface is viewed from the front. .

  For scaffolds used at construction sites, etc., measures to prevent falls from the scaffolds and to prevent objects from falling are required based on the occupational safety and health regulations. One of these fall and fall prevention measures is the installation of skirting boards. Many sites have used scaffold boards for skirting boards, but this method requires tools and requires time to install the skirting boards. In addition, since it is installed at an angle while avoiding interference with the cross braces, the width of the work passage is narrowed, and the usage amount of the scaffolding plate is increased, resulting in an increase in construction cost.

  As a solution to the problem of the conventional method of fixing the scaffolding board with a wire or the like to make a baseboard, it can be attached to the baseboard with a hook or the scaffolding board body with a wedge structure and a pin detachably. There is a scaffold board provided with a skirting board (see, for example, Patent Document 1 and Patent Document 2).

  The baseboards described in Patent Document 1 and Patent Document 2 can be attached easily, but when stored, it is necessary to store the scaffolding board and the baseboard separately, and a separate space for storing the baseboard is also required It becomes. As these are inconvenient, the baseboard and the scaffold board main body are connected and integrated, and when the baseboard is not used, a scaffold board for storing the baseboard on the back side of the scaffold board main body has been proposed (for example, Patent Documents). 3).

Japanese Patent No. 3869277 Japanese Patent No. 3846915 JP-A-8-128192

  In the scaffolding plate described in Patent Document 3, the skirting board and the scaffolding board main body are connected and integrated, and when the skirting board is not used, the skirting board can be stored on the back side of the scaffolding board main body. It is easy to install and does not require a storage space for skirting boards. Since the scaffolding board described in Patent Document 3 stores the baseboard on the back side of the scaffolding board main body, when using the baseboard, it is necessary to stand the baseboard before installing the scaffolding board. In consideration of transportation, installation, etc., it is preferable that the skirting board can be taken out of the storage unit and made usable even after the scaffold board is installed.

  The purpose of the present invention is to allow the baseboard to be compactly stored when the baseboard is connected and integrated with the scaffold board body and the baseboard is not used, and when using the baseboard, there is a gap between the baseboard and the baseboard. Another object is to provide a scaffold plate that does not narrow the passage width. Further, the present invention provides a scaffold plate that can be used by removing the skirting board from the storage unit even after the scaffold plate is installed.

  The present invention according to claim 1 is a foldable plate-like skirting board provided with a side cover that covers a gap between a scaffolding board body and a side part of the scaffolding board body, and the skirting board and the scaffolding board. And a connecting tool for connecting the main body to stand or store the baseboard on the side surface portion of the scaffold board main body, and when using the baseboard, stand the baseboard on the side surface portion of the scaffold board main body. When the baseboard is not used, the baseboard is folded and stored in a side surface portion of the scaffold board main body.

  The present invention according to claim 2 is the scaffold plate according to claim 1, wherein the baseboard is composed of two or more elongated plate-like bodies connected so as to be foldable via a hinge, The side cover is attached so as to be orthogonal to the bottom side of the lowermost plate-like body when the baseboard is erected, and when the baseboard is used, the plate-like body in a folded state is used. It is unfolded and stood up on the side surface of the scaffold board main body, and when the baseboard is not used, the plate-like body is folded and stored in the side surface of the scaffold board main body.

  According to a third aspect of the present invention, in the scaffolding plate according to the first or second aspect, when the baseboard is stored in a side surface of the scaffolding plate main body, an upper surface, a lower surface, a front surface, and a front surface of the scaffolding plate main body. The size is such that it does not protrude from the rear surface.

  According to a fourth aspect of the present invention, in the scaffold plate according to any one of the first to third aspects, when the baseboard is further erected, an end portion of the baseboard and a front end portion of the scaffold board main body, And / or a plate-like end cover that covers a gap formed between the rear end portion and the end cover in an end cover storage portion provided at a front end portion and / or a rear end portion of the baseboard. It is characterized by being stored freely in and out.

  According to a fifth aspect of the present invention, in the scaffolding board according to any one of the first to fourth aspects, the baseboard has a two-part structure that is divided into front and rear, and the front and rear baseboards are integrated. The connection board is provided, and the front and rear skirting boards each have a connection board storage part that can store the connection board at the end part on the other baseboard side, and the connection board storage part on either one of the front and rear baseboards When the connection board is stored and the baseboard is used, the connection board is passed over the front and rear connection board storage portions, and the front and rear baseboards are integrated and used.

  The scaffold board according to the present invention is constructed by connecting and integrating the foldable skirting board and the scaffold board body, and when using the skirting board, the skirting board is used by standing on the side surface of the scaffold board body. Therefore, it is possible to easily use a skirting board without requiring a tool. In addition, since the skirting board is arranged on the side part of the scaffolding board main body, the passage width is not narrowed, and further, the baseboard is provided with a side cover that covers the gap with the side part of the scaffolding board main body. It is possible to prevent the object from falling from the gap with the side surface portion. Moreover, the scaffold board according to the present invention stores the baseboard in the side surface of the scaffold board main body, so that the baseboard can be used even after the scaffold board is installed, which is convenient.

  Further, according to the present invention, the skirting board is composed of two or more elongated plate-like bodies that are foldably connected so as to be overlapped with each other via a hinge. It can be stood or stored on the side surface of the scaffold board body.

  Further, according to the present invention, when the skirting board is stored in the side surface portion of the scaffolding board main body, the skirting board has a size that does not protrude from the upper surface, the lower surface, the front surface, and the rear surface of the scaffolding board main body. If so, it can be used in the same way as a scaffold board without a baseboard. In addition, it is preferable to store the skirting boards so that the skirting boards do not get in the way when stacking the scaffolding boards, and when the scaffolding boards are stored in a warehouse or the like, it does not take up space.

  Further, according to the present invention, the baseboard further has a plate-like end portion that covers a gap formed between the end portion of the baseboard and the front end portion and / or the rear end portion of the scaffold board body when the baseboard is erected. Since the cover is provided, it is possible to prevent the object from falling from the end of the scaffold board main body. Moreover, since this edge part cover is stored in the edge part of a skirting board, it can be used easily by pulling out.

  Further, according to the present invention, the skirting board has a two-divided structure divided forward and backward, and therefore can be easily applied to a scaffold board body having a long length. In addition, when using the baseboard, the front and rear baseboards are integrated and used via the connection plate, so that they are not easily deformed.

It is a perspective view of scaffold board 1 as a 1st embodiment of the present invention, and is a figure showing the state where skirting board 20 was stored. It is a figure which shows the state which has enabled the baseboard 20 of the scaffold board | plate 1 of FIG. It is sectional drawing which shows the state which expand | deployed the plate-shaped body 22a of FIG. 1, and raised the baseboard 20a.

  FIG. 1 is a perspective view of a scaffold board 1 as a first embodiment of the present invention, and shows a state in which a skirting board 20 is stored. FIG. 2 is a diagram illustrating a state in which the baseboard 20 of the scaffold board 1 is usable. FIG. 3 is a cross-sectional view showing a state in which the plate-like body 22a is developed and the skirting board 20a is erected. In the present embodiment, the left and right are the left and right when the front surface 6 of the scaffold board body 3 is viewed from the front, and the front and rear are the front of the scaffold board body 3 when the left side surface 8 is viewed from the front. The 6 side is referred to as the front, and the rear surface 7 side of the scaffold board body 3 is referred to as the rear.

  The scaffold board 1 includes an elongated scaffold board body 3, a pair of left and right skirting boards 20, and a connecting tool 40 (40a, 40b) for pivotally connecting the left and right skirting boards 20 to the scaffold board body 3, and having a width. This is a scaffold board in which the wood 20 and the scaffold board body 3 are connected and integrated. Further, when the skirting board 20 is not used or when the scaffold board 1 is stored, the skirting board 20 can be stored in the side surfaces 8 and 9 of the scaffold board main body 3, and when the skirting board 20 is used, the skirting board 20 stands upright. It is also the scaffolding board 1 provided with the retractable skirting board 20 to be used.

  The scaffold board main body 3 has an elongated plate-like shape, and is the same as the scaffold board main body conventionally used in a construction site or the like. The structure of the scaffolding board body 3 includes a scaffolding board body 3 in which a flat plate is attached on a frame and reinforced with a reinforcing material, and a scaffolding board body 3 that is entirely formed of a single board, and is also made of steel. There is a scaffold plate main body 3 in which a slip stopper is provided on the upper surface 10 of the scaffold plate main body, or a plurality of through holes are formed in the upper surface 10 of the scaffold plate main body. Furthermore, there are various types of scaffolding board main bodies 3 such as scaffolding board main bodies having hooks before and after the scaffolding board main body 3. However, the scaffolding board main body 3 is not limited to a specific scaffolding board main body 3 and has been widely used conventionally. Can be used.

  The baseboard 20 is a baseboard that can be folded and stored, and the pair of left and right baseboards 20 are the same. The skirting board 20 is a skirting board having a two-part structure composed of two skirting boards 20a and 20b arranged side by side on the side surfaces 8 and 9 of the scaffold board main body 3, respectively. The two baseboards 20a and 20b arranged side by side are the same. The skirting board 20 is formed by connecting four elongate plate-like bodies 22 (22a, 22b) substantially functioning as skirting boards and folding them through hinges 25 (25a, 25b are not shown) so that they can be unfolded. ing. When the plate-like body 22 is developed, it becomes a single flat plate. Note that the number of the plate-like bodies 22 is not limited to four, and can be appropriately selected according to the height of the baseboard 20. The skirting board 20 includes a connecting plate 26 for connecting the front and rear plate-like bodies 22a and 22b, outer end portions 28a and 28b of the plate-like bodies 22a and 22b formed when the skirting board 20 is erected, and an end portion of the scaffold plate body. Side cover 23a covering the gap between the plate-like bodies 22a, 22b and the side faces 8, 9 of the scaffolding plate main body formed when the end covers 30a, 30b and the plate-like bodies 22a, 22b covering the gaps 12 and 13 are developed. , 23b.

  The plate-like body 22 has an elongated lip channel steel-like shape and has a substantially C-shaped cross section. The use of a lip groove steel plate instead of a simple cubic plate for the plate-like body 22 makes the plate-like body 22 function as a skirting board and is also used as a storage means for storing the connection plate 26 and the like. It is to do. In the present embodiment, both end portions 24a, 24b, 28a, 28b of the plate-like bodies 22a, 22b function as storage units. A plate-like connecting plate 26 is provided at the central end 24a of the front plate-like body 22a, and the outer end 28a and the scaffold plate body 3 are provided at the outer ends 28a, 28b of the front and rear plate-like bodies 22a, 22b. A plate-like end cover 30a that covers a gap between the front end 12 and a plate-like end cover 30b that covers a gap between the outer end 28b and the rear end 13 of the scaffold board body 3 is stored. ing. The plate-like bodies 22a, 22b have only the end portions 24a, 24b, 28a, 28b having a substantially C-shaped or box-like cross-sectional shape, and are used as storage units for storing the connection plate 26 and the end cover 30a, 30b. The central part may be a flat plate.

  The lengths of the plate-like bodies 22a and 22b are slightly shorter than half of the length in the longitudinal direction of the scaffold board body 3, and when the baseboard 20 is stored in the side faces 8 and 9 of the scaffold board body, the scaffold The length does not protrude from the front surface 6 and the rear surface 7 of the plate body 3. The height is a little lower than the thickness of the scaffold board body 3, more specifically, the same as the distance between the upper end of the support pins 42 (42a, 42b) of the connector 40 and the upper surface 10 of the scaffold board body. When the skirting board 20 is stored in the side surfaces 8 and 9 of the scaffold board main body, the height does not protrude from the upper surface 10 of the scaffold board main body. Since the support pins 42 are provided, when the skirting board 20 is stored on the side surfaces 8 and 9 of the scaffold board body, the plate-like bodies 22a and 22b do not jump out from the bottom face 11 of the scaffold board body. The thickness of the plate-like bodies 22a and 22b is not particularly limited, and may be thin unless special strength is required.

  The connection plate 26 is a member for connecting the front and rear plate-like bodies 22a and 22b and is a flat plate-like member, which is substantially the same as the space formed inside the substantially C-shaped cross section of the plate-like bodies 22a and 22b. It is a size. When the skirting board 20 is not used, it is slidably stored in the center side end 24a of the front plate-like body 22a. When the skirting board 20 is used, the center side end 24a of the front and rear plate-like bodies 22a, 22b is stored. , 24b. Since the connection plate 26 has substantially the same size as the space formed inside the plate-like bodies 22a and 22b, the front and rear plate-like bodies 22a and 22b can be firmly connected.

  The end covers 30a and 30b are members that cover gaps between the outer end portions 28a and 28b of the plate-like bodies 22a and 22b and the end portions 12 and 13 of the scaffold plate body when the baseboard 20 is erected. Which is substantially the same size as the space formed inside the substantially C-shaped cross section of the plate-like bodies 22a and 22b. When the skirting board 20 is not used, it is slidably stored in the outer end portions 28a, 28b of the front and rear plate-like bodies. When the skirting board 20 is used, the connecting rod 44 (44a, 44b) is raised to form a plate-like body. After unfolding 22a and 22b, the drawer is used. Since the size of the end covers 30a and 30b is substantially the same as the space formed inside the substantially C-shaped cross section of the plate-like bodies 22a and 22b, the end covers 30a and 30b are made to be plate-like bodies. Even if it is pulled out from the outer end portions 28a, 28b, it is stable without wobbling.

  Of the plate-like bodies 22a and 22b, the plate-like bodies 22a and 22b and the scaffolds formed when the plate-like bodies 22a and 22b are unfolded are provided at the bottom of the plate-like body which is the lowest when the plate-like bodies 22a and 22b are unfolded Side covers 23 a and 23 b are provided to cover the gaps between the side surfaces 8 and 9 of the plate body. The side covers 23a and 23b are flat members, and the width is the same as the distance ΔL between the inner side of the connecting rods 46a and 46b and the side portions 8 and 9 of the scaffold plate body. The widths of the side covers 23a and 23b are the same as the thicknesses of the plate-like bodies 22a and 22b when the plate-like bodies 22a and 22b are folded. Note that the side covers 23a and 23b may be formed integrally with the plate-like bodies 22a and 22b which are the lowest when unfolded.

  The connection tool 40 supports the baseboard 20 and rotatably connects the baseboard 20 to the scaffold board main body 3, and stands the baseboard 20 on the side faces 8 and 9 of the scaffold board main body, or the side face of the scaffold board main body. 8 and 9 are members to be stored. The connector 40 is configured such that when the baseboard 20 is stored, the upper ends 32a and 32b of the baseboards 20a and 20b do not protrude from the upper surface 10 of the scaffold board body, and the end portions 28a and 28b of the plate-like body are provided on the scaffold board body. The baseboard 20 is connected to the scaffold board body 3 so as not to protrude from the end portions 12 and 13. Further, when the baseboards 20a and 20b are erected on the side surfaces 8 and 9 of the scaffold board main body, the connector 40 connects the baseboards 20a and 20b so that there is no gap between them.

  The couplers 40a and 40b include a plurality of elongated plate-like coupling rods 46 (46a and 46b), support pins 44 (44a and 44b) that couple one end of the coupling rod 46 to the plate-like body 22, and the coupling rod 46. It consists of the support pin 42 (42a, 42b) which connects the other end part of this and the scaffolding board main body 3. FIG. Here, the front or rear baseboards 20a, 20b are supported by the four connecting rods 46a, 46b. To support the skirting board 20, at least two connecting bars 46 are sufficient. However, the connecting bar 46 comes into contact with the plate-like body 22 when the skirting board 20 is raised, and a force is applied to the plate-like body 22. Therefore, when the plate-like body 22 is long, it is preferable that the number is large. Further, if the number of the connecting rods 46 is increased, the thickness of the connecting rod 46 and the size of the support pins 42 and 44 can be reduced, so that the distance between the support pin 42 and the upper surface 10 of the scaffold board main body is increased. Can do. It is preferable that the height of the plate-like body 22 can be increased by increasing the distance between the support pin 42 and the upper surface 10 of the scaffold plate body, and as a result, the number of the plate-like bodies 22 can be reduced.

  Since the length of the connecting rod 46 basically determines the height of the baseboard 20, it is necessary to match the height of the baseboard 20. Specifically, when the skirting board 20 is erected, the bottom surface 27 of the side cover needs to have a length that matches the top surface 10 of the scaffold board body. When the length of the connecting rod 46 and the height of the baseboard 20 are unbalanced and the length of the connecting rod 20 is short, there is a gap between the bottom surface 27 of the side cover and the upper surface 10 of the scaffolding plate body when the baseboard 20 is raised. Is not preferable. On the other hand, if the length of the connecting rod 46 and the height of the baseboard 20 are unbalanced and the connecting rod 46 is too long, when the baseboard 20 is raised, the side cover 23 rides on the upper surface 10 of the scaffold board body. 3 passage width becomes narrow.

  The support pin 42 is fixed in the vicinity of the bottom side of the side surfaces 8 and 9 of the scaffold board body, and a through hole (not shown) formed in one end portion of the connecting rod 46 passes therethrough. One support pin 44 is fixed to the upper part of the plate-like body 22 that is the uppermost when the plate-like body 22 is unfolded, and has a through hole (not shown) drilled in the other end of the connecting rod 46. To penetrate. The connecting rod 46 is rotatable with respect to the support pins 42 and 44.

  When the scaffold board 1 is not used or when the scaffold board 1 is used but the skirting board 20 is not required, the plate-like body 22 is folded and stored in the side surfaces 8 and 9 of the scaffold board body 1 as shown in FIG. Keep it. At this time, since the skirting board 20 has a size that does not protrude from the upper surface 10 and the end portions 12 and 13 of the scaffold board body, the skirting board 20 is not obstructed and the skirting board 20 is not damaged. When the skirting board 20 is stored in the side surfaces 8 and 9 of the scaffold board body, the skirting board 20 is stored in a state sandwiched between the connecting rod 46 and the side surface parts 8 and 9 of the scaffold board body. The skirting board 20 will not wobble. When the skirting board 20 is stored in the side surfaces 8 and 9 of the scaffold board main body, it is preferable to provide a lock device so that the skirting board 20 or the connecting tool 40 does not rotate. As the locking device, it is preferable to use a locking device including a projection with a built-in urging spring and a projection receiving portion such as a roller tightening because fixing and releasing can be easily performed. Alternatively, a magnet may be used for the locking device, and the plate-like body 22 that is the lowermost when deployed may be attracted to the scaffold plate body 3 using magnetic force.

  When the skirting board 20 is used, the skirting board 20 is erected on the side surfaces 8 and 9 of the scaffold board main body. In order to elevate the skirting board 20 on the side surfaces 8 and 9 of the scaffold board body, the coupling tool 40 is erected so that the connecting rod 46 is orthogonal to the upper surface 10 of the scaffold board body, and the plate-like body 22 is successively deployed. That's fine. Each plate-like body 22 is folded via a hinge 25 and is connected so as to be deployable, so that it can be easily deployed. At this time, the end portion 31 of the side cover 23 is positioned so as to contact the upper end of the side surface of the scaffold board body, so that the passage width of the scaffold board body is not reduced, and the side cover 23 and the side face portion 8 of the scaffold board body, No gap can be formed between the bolts 9 and a small article such as a bolt can be reliably prevented from falling.

  After unfolding the front and rear plate-like bodies 22a and 22b, the connection plate 26 is slid to span the connection plate 26 to the center side ends 24a and 24b of the front and rear plate-like bodies 22a and 22b. Since there is no gap between the front and rear plate bodies 22a and 22b in the state where the skirting board 20 is erected, and the front and rear plate bodies 22a and 22b are connected and integrated by the connection plate 26, they are not wobbled and strong. is there. Thereafter, the end covers 30a and 30b stored in the outer end portions 28a and 28b of the plate-like bodies 22a and 22b are pulled out. When storing the skirting board 20, the above procedure may be reversed.

  As shown in the above embodiment, the scaffolding plate according to the present invention is a scaffolding plate in which the baseboard and the scaffolding plate main body are connected via a connector and the baseboard and the scaffolding plate main body are integrated, and the baseboard is used. When doing so, the skirting board is used by standing on the side surface of the scaffold board body, so that it is possible to use the skirting board easily without requiring any tools. Moreover, since the skirting board is arrange | positioned at the side part of the scaffolding board main body, it does not narrow a passage width and is convenient. Furthermore, in the case of using the plurality of scaffolding boards side by side so that the lateral direction is in contact, if the end cover is spanned over the baseboards of the adjacent scaffolding boards, there is no gap and the baseboards are integrated and become stronger. Become. In the present embodiment, the skirting board divided into two is shown, but the skirting board may be integrated. If the length of the scaffolding board body is long, the baseboard will also be long, so it is easier to manufacture the two-part structure, but the structure of the integrated baseboard is simple, so the length of the scaffolding board body is short For this, an integrated baseboard is preferable to a baseboard having a two-part structure.

DESCRIPTION OF SYMBOLS 1 Scaffold board 3 Scaffold board main body 6 Front face of scaffold board main body 7 Rear face of scaffold board main body 8 Left side face of scaffold board main body 9 Right side face of scaffold board main body 10 Upper surface of scaffold board main body 11 Bottom face of scaffold board main body 12 Bottom of scaffold board main body Front end 13 Back end 20, 20a, 20b Scaffolding board 22 22a, 22b Plate-like body 23a, 23b Side cover 24a Center side end 24b of front-side plate-like body Center side end portions 25, 25a Hinge 26 Connecting plate 27 Bottom surface 28a of side cover Outer end portion 28b of front plate-like body Outer end portions 30a, 30b of rear plate-like body End cover 31 End portion 32a of side cover , 32b Upper ends 40, 40a, 40b of skirting boards 42, 42a, 42b Support pins 44, 44a, 44b Support pins 46, 46a, 46b Connecting rods

Claims (5)

A scaffold plate body,
A foldable plate-like skirting board provided with a side cover that covers a gap with the side part of the scaffold board body;
A connector for connecting the baseboard and the scaffold board main body to stand or store the baseboard on a side surface of the scaffold board main body,
When the skirting board is used, the skirting board is erected on the side surface part of the scaffold board main body, and when the base board is not used, the base board is folded and stored in the side part of the scaffold board main body. And scaffolding board. The skirting board is composed of two or more elongated plate-like bodies that are foldably connected so as to be overlapped via a hinge, and the side cover is a plate-like shape that is positioned at the lowest position when the skirting board is erected It is attached so as to be orthogonal to the bottom of the body,
When the skirting board is used, the plate-like body in a folded state is unfolded and stood up on the side surface of the scaffold board main body, and when the skirting board is not used, the plate-like body is folded and the scaffold board is folded. The scaffold board according to claim 1, wherein the scaffold board is stored in a side part of the main body.   The scaffold according to claim 1 or 2, wherein the baseboard is a size that does not protrude from an upper surface, a lower surface, a front surface, and a rear surface of the scaffold board main body when stored in a side surface portion of the scaffold board main body. Board. Furthermore, when the baseboard is erected, a plate-like end cover that covers a gap formed between an end portion of the baseboard and a front end portion and / or a rear end portion of the scaffold board main body,
The said end cover is stored in the end cover storage part provided in the front-end part and / or rear-end part of the said baseboard so that insertion / extraction is possible, The any one of Claim 1 to 3 characterized by the above-mentioned. The described scaffolding board. The skirting board has a two-part structure divided into front and rear, and includes a connection plate that integrates the front and back skirting boards,
The front and rear skirting boards each have a connection board storage portion that can store a connection board at the end of the other baseboard side, and the connection board is stored in one of the front and rear skirting board. ,
The scaffold board according to any one of claims 1 to 4, wherein when using a skirting board, the connecting board is spanned between the front and rear connection board storage portions, and the front and back skirting boards are integrated and used. .

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