JP4806752B2 - Furniture with a top plate - Google Patents

Description

  The present invention relates to furniture with a top plate that is suitably used in offices and the like.

  2. Description of the Related Art Conventionally, in offices and the like, there are widely used usage forms in which the top plate of the furniture with the top plate is provided adjacent in the width direction, the opposite use ends of the top plate are opposed to each other, and are seated facing each other. . In addition, a partition having the same width as the top plate of such furniture with a top plate is prepared, and such a partition is provided at a place where a person of a job type who needs to work intensively sits down. The use aspect which arrange | positions to the anti-use end side of furniture with a top plate is considered.

As an example of the furniture with a top plate and a partition provided for such a use mode, for example, a furniture with a top plate having legs that support both side edges of the top plate, and a base so as not to interfere with the legs of the furniture with the top plate The combination with the partition which has arranged is considered. (For example, see Patent Document 1.)
In Patent Document 1, the furniture with a top plate is described as a desk, and the partition is described as a frame structure.
JP 2003-111624 A

  By the way, in the configuration described in Patent Document 1, the partition is prepared as furniture different from the furniture with a top plate.

  Therefore, due to factors such as facility management costs, there is a demand for using a single type of furniture with a top board so that it can be used in various ways of use.

  The present invention is configured to solve the above problems.

That is, the furniture with a top plate according to the present invention includes a top plate having a depth dimension suitable for a normal office desk, a support structure for supporting the top plate from below, and an optional member arranged at the center in the depth direction of the top plate. The support structure includes a leg that supports both ends of the top plate in the width direction, and is provided horizontally across the top plate. A frame extending in the width direction and spaced apart in the depth direction of the top plate and provided on each top plate and supported at both ends by the legs, and the legs and the frame are detachable from each other , one of said frame, the other of the top fitted with furniture at a state of being supported only at one end portion of the frame leg, the other frame and the other end of the frame of those said other of the top fitted with furniture which has the same configuration allowing coupling in a direction perpendicular through the connecting portion Are those having a recess fit, characterized in that said top plate, than one frame of the support structure it is possible to position a position to expose the opposite side of the part and the other of the frame in the upper space And

  If comprised in this way, when performing a normal office work, the island-type arrangement | positioning which arrange | positions such furniture with a top plate adjacent to each other in the width direction and makes the non-use ends of the furniture with a top plate face each other is adopted. In addition, when performing work that needs to be performed in a concentrated manner, an optional partition such as a partition or shelf is provided at the center in the depth direction of the top plate via the optional mounting portion, and another ceiling is provided at the end in the width direction. It is possible to take an arrangement in which the furniture with a top plate provided with the optional members is provided as a furniture storage place or the like by providing furniture with a plate adjacent in the horizontal direction. Furthermore, when using a large number of devices used for measurement and the like, furniture with a top plate is provided adjacent to the use end side of the furniture with a top plate provided with the option member in the depth direction, and the furniture with the top plate provided with the option member Can be used as an article storage place. In other words, a single type of furniture with a top plate can be used for various usage modes.

Further, the support structure is provided with legs that support both ends in the width direction of the top plate, and is provided horizontally across the top plate and extends in the width direction of the top plate, and at least one end portion is supported by the legs. The leg and the frame are detachable from each other, so that one of the legs supporting both ends in the width direction of the top plate is removed, and the leg of the top plate is removed. By supporting the end portion on the side by other furniture with a top plate, it is possible to widen the leg space when the seat is used by being seated on the furniture with the top plate removed. Therefore, it is particularly effective when another piece of furniture with a top plate is provided side by side at the end in the width direction of such furniture with a top plate.

Furthermore, since only one end of the frame is supported by the leg, the other end of the frame can be connected to another frame extending in a direction perpendicular to the frame via a connecting portion . Such a configuration can be realized more specifically .

  Furthermore, as a configuration for easily realizing the configuration described in the previous stage, the connecting portion includes a protrusion protruding in the extending direction of the frame, and a recess formed in another frame extending in a direction orthogonal to the frame. Can be mentioned.

  As an aspect for attaching the option member without impairing the appearance, there is one in which the option attachment portion is formed by using a notch provided at the center of both side edges of the top plate. This is because the appearance can be made clear by arranging an optional member in the notch.

  As a configuration for more effectively dealing with various embodiments, there is a configuration in which the top plate and the support structure have symmetrical shapes. If this is the case, the person who is seated on both sides of the furniture with the top panel will use both the front side and the rear side as the edges, and another furniture with the top panel will be placed on both sides. The area of the available top plate surface can be made the same.

  Moreover, a partition, a shelf, and a storage are mentioned as an example of the option member used suitably for such furniture with a top plate.

  Since the present invention is configured as described above, an option member is arranged at the center of the top plate in the depth direction, and another piece of furniture with a top plate is further arranged at the use edge, thereby allowing a concentrated work space. In addition, since a work space can be secured when a large number of devices used for measurement and the like are used, a single type of furniture with a top plate can be used for various usage modes.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  The table T1, which is a furniture with a top plate according to this embodiment, is shown in FIG. 1 as a whole perspective view, in FIG. 2 as a plan view, and as shown in FIG. Two top plates 1 and a support structure 2 that supports the top plate 1 are provided. Further, the support structure 2 of the table T1 includes a top plate a1 and a support structure a2 as shown in FIG. 1 as a whole perspective view and in FIG. 2 as a plan view, and has the same structure as the table T1. The support structure a2 of the other table T2 having the above is connected through a connecting portion 5 described later, and the side edge of the top plate a1 of the other table T2 is adjacent to the use edge of the top plate 1 of the table T1. So that it can be placed in an open state.

  In this embodiment, the top plate 1 has a depth dimension suitable for a normal office desk. In the present embodiment, a plurality of top plates 1 can be used adjacent to each other in the width direction. And this top plate 1 has the shape which is symmetrical in the front-back direction and left-right symmetric. In addition, as a depth dimension suitable for a normal office desk, the depth dimension of the top plate 1 is set in a range of 600 to 800 mm, desirably 700 mm.

  Further, the support structure 2 is disposed in the vicinity of the outer end of the table T1, and the end legs 21 that support the outer end portion of the top plate 1 located at the outer end and the side surfaces of the two top plates 1 and 1 are arranged. An intermediate leg 22 that supports the side edge portion of the opposing portion across the two top plates, and a frame 23 that is provided horizontally across the top plate 1 and has one end portion supported by the end legs 21. ing. Here, in this embodiment, the end leg 21 or the intermediate leg 22 and the frame 23 are detachable from each other. The support structure 2 also has a shape that is symmetric in the front-rear direction and in the left-right direction.

  In the present embodiment, the end legs 21 are horizontally provided between leg legs 211, 211, which are erected from the floor surface and provided in a pair of front and rear, and upper ends of the leg pillars 211, 211. A frame member 212, a curtain plate 213 supported by the leg column 211 and the horizontal member 212, a projection projecting from the horizontal member 212 in the opposite direction to the curtain plate 213, and the frame 23 at the tip. And at least a frame receiving portion 214 to be attached.

  In the present embodiment, the intermediate leg 22 is erected from the floor surface and provided in a pair of front and rear legs 221, 221 and the front leg strut 221 from the upper end to the front, and the rear leg strut 221. The top plate receiving portions 222 and 222 provided to protrude rearward from the upper ends of the top, the connecting portion 223 for connecting the upper portions of the leg struts 221 and 221 and the top plate receiving portions 222 and 222 to the left and right Each has at least four frame receiving portions 224 provided so as to protrude from each other and to which the frame 23 is attached at the tip. The depth dimension of the intermediate leg 22 is smaller than the depth dimension of the end leg 21. That is, the intermediate leg 22 is disposed at a position closer to the center in the depth direction than the end leg 21.

  The frame 23 is formed using a square pipe. In this embodiment, two frames 23 are provided for each top plate 1 below the top plate 1 and spaced apart in the depth direction of the top plate 1. . Further, both ends of the frame 23 are provided with fixing pins having bolt insertion holes through which bolts for fixing to the frame receiving portions 214 and 224 can be inserted, and on the upper surfaces of both ends of the frame 23. Has an opening window through which the bolt can be inserted. In the present embodiment, the connection mode between the frame 23 and the end leg 21 or the intermediate leg 22 is not described in detail, but is the same as that disclosed in JP-A-2005-52395.

  Here, in the present embodiment, the “outer end” refers to the outermost end in the state where the plurality of top plates 1 are adjacent to each other in the width direction and supported by the support structure 2, and one top plate 1. In a mode in which only the support structure 2 is supported, it is a concept showing both side ends of the top plate 1. Further, in the aspect in which only one top plate 1 is supported by the support structure 2, the intermediate leg 22 can be omitted.

  The top plate a1 of the other table T2 has the same structure as the top plate T1 described above. On the other hand, the support structure a2 of the other table T2 has a longitudinally symmetrical shape, and one end of the frame a23 having the same structure as that of the frame 23 described above has the same structure as that of the end leg 21 described above. And the other end of the frame a23 is connected to the frame 23 of the table T1 through the connecting portion 5. FIG. 4 shows an exploded perspective view of a connecting portion between the frame a23 of the table T2 and the frame 23 of the table T1 through the connecting portion 5.

  Specifically, the connecting portion 5 is formed using a connecting member 51 having a protrusion 51x protruding in the extending direction of the frame a23, and extends in a direction orthogonal to the protrusion 51x and the frame a23. The other frame, that is, the recess 23y formed in the frame 23 of the table T1 is engaged.

  More specifically, the connecting member 51 includes a main body 511 having a rectangular parallelepiped shape, a frame receiving portion 512 provided to protrude from one side surface of the main body 511, and the other end of the frame a23 being attached, and a main body 511. A mounting portion 513 is provided so as to protrude from the other side to the opposite side of the frame receiving portion 512 and has the protrusion 51x at the tip. The mounting portion 513 is located at a base end portion and has a base portion 513a having the same configuration as the frame receiving portion 512, and a connection portion 513b formed by using a square pipe and having one end portion fixed to the base portion 513a by welding or the like. And a plate-like lid (not shown) having a bolt insertion hole (not shown) through which the bolt can be inserted and covering the other end of the connection portion 513b, and the protrusions provided from both side edges of the lid. And a tip portion 513c having a protrusion 51x and fixed to the other end portion of the connection portion 513b by welding or the like.

  On the other hand, the frame 23 of the table T1 is provided with the recess 23y so as to be engageable with the protrusion 51x, and further provided with a female screw hole 23z into which a bolt through which the bolt insertion hole is inserted can be screwed.

  In order to support the top plate a1 on the support structure a2 of the table T2 with the side edge of the top plate a1 of the table T2 facing the use end edge of the top plate 1 of the table T1, In such a procedure, the frame a23 of the table T2 is connected to the frame 23 of the table T1. First, one end edge of the frame a23 of the table T2 is connected to the frame receiving portion 512 of the connecting member 51, and the protrusion 51x is engaged with the concave portion 23y of the frame 23 of the table T1, so that the frame a23 and the connecting member 51 of the table T2 are engaged. The table T1 is positioned with respect to the frame 23. Then, the bolt is inserted into a bolt insertion hole (not shown) and then screwed into the female screw hole 23z. Thereafter, the other end portion of the frame a23 of the table T2 is connected to the frame receiving portion 214 of the end leg a21 of the table T2, and the top plate a1 is disposed above the frame a23. By doing in this way, the top plate a1 of the table T2 can be arranged with the side edge facing the use end edge of the top plate 1 above the frame 23 of the table T1.

  The other end of the frame a23 of the table T2 is connected not to the end leg a21 but to an intermediate leg (not shown) configured in exactly the same way as the intermediate leg 22 of the table T1, and another frame a23 is connected to this intermediate leg. The table T2 may be supported by the support structure a2 with a plurality of top plates a1 adjacent to each other in the width direction in the same manner as the table T1.

  In addition, the table T1 further includes a slide support portion 6 so that the top plate 1 can slide in the depth direction with respect to the support structure 2.

  The slide support 6 includes a long hole 61x extending in the depth direction of the top plate 1 and a round hole 61y communicating with one end of the long hole 61x and having a diameter larger than the width of the long hole 61x. 1 and the guide plate 61 as shown in FIG. 1, the substantially disc-shaped engaging portion 62a having the same diameter as the round hole 61y, and the frame 23. 9 has an engaging protrusion 62 as shown in a front view of FIG. 9, which protrudes from the upper surface of the end portion and has a base portion 62b that connects the engaging portion 62a and the frame 23 and can be inserted into the elongated hole. To do. Although not shown, the guide plate 61 is provided with a countersink hole formed in the bottom surface of the top plate 1. Further, although not shown, a groove having a width dimension substantially the same as the diameter of the round hole 61y is formed in a portion corresponding to the long hole 61x so as to accommodate the engaging portion 62a. Then, the engaging portion 62a is inserted into the round hole 61y to attach the top plate 1 to the support structure 2, and the top plate 1 is slid in a state where the base portion 62b passes through the long hole 61x. I have to. In the present embodiment, the engaging protrusion 62 is formed using a stepped pin. FIG. 9 is an enlarged front view showing the vicinity of the engaging protrusion 62 of the frame 23, that is, the portion near the end.

  Further, in order to limit the range of sliding movement of the top plate 1 relative to the support structure 2, the slide support portion 6 further includes a stopper portion 63. The stopper portion 63 is attached to the front surface of the frame 23 located on the counter-use end side, and has a stopper member 631 having a stopper piece 631a that can project and retract vertically, and the top plate 1 that can be engaged with the stopper piece 631a. It is formed using the stopper hole 1z formed on the bottom surface. The stopper hole 1z has the top plate 1, the normal position where the entire support structure 2 can be covered from the upper space by the top plate 1, and the other frame 23 than the one frame 23 of the support structure 2. Are provided at portions facing the stopper pieces 631a when the portions on the opposite side are positioned at the slide positions where they are exposed to the upper space.

  1 and 2 show only the case where the top plate 1 is positioned at the normal position. The slide support 6 is not necessarily provided.

  Thus, in the present embodiment, an optional mounting portion 4 is provided which is disposed at the center in the depth direction of the top plate 1 and can mount the partition 3 which is an optional member.

  The partition 3 is positioned at both side ends, and a pair of support columns 31, 31 each having a lower end supported by the end leg 21 or the intermediate leg 22 and a panel disposed between the support columns 31, 31. And element 32. The panel element 32 is attached to a mounting hole 31x formed in the column 31 by attaching a panel mounting tool (not shown) having a claw projecting toward the front upper side. This is done by engaging a recess formed on the rear surface. A shelf plate 33 having a claw 331 that can be engaged with the mounting hole 31x is installed between the support columns 31, 31 so that the partition 3 can be used as a shelf.

  On the other hand, among the optional mounting portions 4, those located at the outer end are formed by notches 1x provided at the center of both side edges of the top plate 1 and a horizontal member 212 that forms the upper surface of the end leg 21. It is formed using the formed screw insertion hole 21x and the first spacer member 41 positioned between the horizontal member 212 and the column 31. Others include a notch 1x provided at the center of both side edges of the top plate 1, a screw insertion hole 22x formed in the connecting portion 223 of the intermediate leg 22, the connecting portion 223 and the support column 31. And a second spacer member 42 positioned between the two. Bolts are inserted through the first spacer member 41 and the second spacer member 42, and bolts inserted through a female screw hole (not shown) formed at the lower end of the column 31 are screwed into the first spacer member 41 and the second spacer member 42. Screw insertion holes 41x and 42x for attaching the first spacer member 41 or the second spacer member 42 are formed. Further, the first spacer member 41 is formed with a female screw hole 41y into which a bolt into which the screw insertion hole 21x formed in the horizontal member 212 is inserted can be screwed. The second spacer member 42 is formed with a female screw hole 42y into which a bolt into which the screw insertion hole 22x formed in the connecting portion 223 is inserted can be screwed. And the lower end part of the support | pillar 31 of the said partition 3 is located in the said notch 1x in the state which attached this partition 3 to the end leg 21 and the intermediate leg 22. As shown in FIG. The notch 1x covers the inside with a lid (not shown) when the partition 3 or the like which is an optional member is not attached.

  That is, as shown in FIG. 3 and FIG. 5 and FIG. 6 which are enlarged views showing the main part of FIG. 3, the first spacer member 41 or the first spacer member 31 is provided below the column 31 of the partition 3. 2 spacer member 42 is attached, the lower end of the column 31 of the partition 3 is positioned in the notch 1x, and the first spacer member 41 is mounted on the horizontal member 212 of the end leg 21 and the second When the spacer member 42 is fixed to the connecting portion 223 of the intermediate leg 22, the partition 3 can be provided at the center of the top plate 1 in the depth direction.

  Such tables T1 and T2 can be arranged in various ways as described below.

  First, as shown in FIG. 7, a plurality of top plates 1 are arranged adjacent to each other in the width direction in a region used by a person who performs general office work, and these top plates 1 are supported in the above-described manner. Two sets of tables T1 ′ supported by the structure 2 and having the same configuration as the table T1 described above are prepared, and the top plate 1 is set to the depth with the edges extending in the width direction of the top plate 1 facing each other. Adjacent to the direction. In this way, the area used by those who perform general office work can be configured in an island shape.

Further, in an area used by a person who performs work that needs to be performed in a concentrated manner, first, as shown in FIG. 8, a plurality of top plates 1 are arranged adjacent to each other in the width direction, and these top plates 1 are arranged as described above. A table T1 ′ having the same configuration as the above-described table T1 supported by the support structure 2 in the manner described above is prepared. Next, as shown in the lower half of FIG. 8, the table T2 described above is connected to the table T1 ′. That is, the frame a23 of the table T2 extending in the direction orthogonal to the frame 23 of the table T1 ′ via the connecting portion 5 is connected, and the end leg a21 of the table T2 is further connected to the other end of the connected frame a23. Connecting. And as shown in the said FIG. 8, the partition 3 is attached through the said option attaching part 4 to the depth direction center of each top plate 1 of table T1 '. In this way, the work area closer to the private room can be secured by mainly using the top plate a1 of the table T2.

In an area used by a person who uses a large number of devices used for measurement or the like, first, as shown in the upper half of FIG. 8, a plurality of top plates 1 are arranged adjacent to each other in the width direction. Two sets of tables T1 ′ having the same configuration as the above-described table T1 and 1 supported by the support structure 2 in the above-described manner are prepared, and the edges extending in the width direction of the top plate 1 are opposed to each other. In this state, the top plate 1 is disposed adjacent to the depth direction. And as shown in the said FIG. 8, the partition 3 is attached via the said option attachment part 4 to the depth direction center of each top plate 1 of table T1 'arrange | positioned on the opposite side to the side where a seated person sits. If it does in this way, the top plate 1 of the other table T1 'can be secured as a main work area while using the top plate 1 of the table T1' to which the partition 3 is attached as a mounting space for the equipment.

  That is, the table T1 according to the present embodiment can be configured in various manners using only a single type of furniture with a top plate by configuring as described above.

  Further, since the option mounting portion 4 is formed by using the notch 1x provided at the center of both side edges of the top plate 1, the lower end portion of the partition 3 which is an optional member is provided in the notch 1x. By arranging it, the appearance can be refreshed. That is, the partition 3 can be attached without impairing the appearance.

  Further, the support structure 2 is provided horizontally on the lower side of the top plate 1 and the end legs 21 and the intermediate legs 22 that support both ends in the width direction of the top plate 1 and extends in the width direction of the top plate 1. In addition, at least one end portion is provided with a frame 23 supported by the end leg 21 or the intermediate leg 22, and the end leg 21 or the intermediate leg 22 and the frame 23 are detachable from each other. Can be used as T2. That is, the end leg 21 that supports one end in the width direction of the top board 1 is removed, and the end leg 21 from which the end leg 21 is removed is supported by another furniture with a top board, thereby the end leg 21 is It is possible to widen the leg space when sitting on the removed table T1 and using it.

  Further, in the table T2, in the state where only one end of the frame a23 is supported by the end leg a21 or the intermediate leg a22, another frame extending the other end of the frame a23 in a direction perpendicular to the frame a23. In other words, since the frame can be connected to the frame of the table T1 via the connecting portion 5, the effect described in the previous stage can be easily realized.

  In addition, the connecting portion 5 includes a protrusion 51x protruding in the extending direction of the frame a23 and a recess 23y formed in the frame 23 of the table T1, which is another frame extending in a direction orthogonal to the frame a23. Since they are formed together, such a connecting portion 5 can be realized with a simple configuration, and positioning can be easily performed by engaging the projection 51x and the recess 23y.

  The present invention is not limited to the embodiment described above.

  For example, if the installation location of the optional mounting part is the center part in the depth direction of the top board having a depth dimension suitable for a normal office desk, it is not the center in the depth direction of the side edge, but the center part in plan view of the top board You may make it provide in.

  Moreover, the connection part which connects the mutually orthogonal frames, for example, the connection part 5 which connects the frame a23 of the table T2 and the frame 23 of the table T1 in the above-described embodiment, other than the above-described ones, for example, A fixing pin having a bolt insertion hole similar to that provided at both ends of the frame is provided on the connecting member, and a female screw hole to which a bolt having the bolt insertion hole inserted can be screwed on a side surface of the frame, You may employ | adopt the aspect which connects frames mutually orthogonally using only the clamping force which generate | occur | produces when a volt | bolt is screwed in the said female screw hole.

  Furthermore, the frame a23 of the table T2 in the embodiment described above may be supported on the top plate T1 of the table T1 in the embodiment described above. That is, in a state where one end portion of the frame a23 is supported by the end leg a21, the other end portion of the frame a23 is replaced with the connecting portion 5 in the above-described embodiment, and the table T2 is a furniture with a top plate having the frame a23. You may comprise so that it may connect via the connection part comprised so that it might be supported by the top plate 1 of the table T1 which is another furniture with a top plate arrange | positioned adjacent to.

  When the use end and the counter-use end are predetermined and other furniture is always arranged adjacent to the counter-use end, the support structure does not necessarily have to be symmetrical in the front-rear direction. You may equip the leg which has a base which protrudes toward a use end side from a non-use end side.

  When the counter-use ends of the top plate are arranged to face each other, the space between the counter-use ends of the furniture with the top plate facing each other is used as a wiring insertion space, and a wiring receiver is provided in this wiring insertion space. May be.

  In addition, as an optional member, as shown in the perspective view of the state attached to the table T1 in FIG. 10, between the closed position S covering the storage space 9s and the open position O door opening the storage space 9s to the outside. A mode in which the storage 9 provided with the movable door 91 is also conceivable. Note that the door 91 is not limited to the one that is rotatable about the rotation axis set at the upper end portion shown in FIG. Furthermore, the storage may not be supported by the partition 3 as shown in FIG. 10 but may be supported directly on the support columns attached to the support structure via the option mounting portion. . In the above-described embodiment, as an optional member, a member in which only the shelf plate 33 is attached to the column 31, that is, a member having only a function as a shelf may be attached.

  In addition, various modifications can be made without departing from the spirit of the present invention.

The whole perspective view of the furniture with a top plate concerning one embodiment of the present invention. The top view of the furniture with a top plate which concerns on the same embodiment. The disassembled perspective view of the furniture with a top plate which concerns on the same embodiment. The disassembled perspective view which shows the connection part between the furniture with a top plate which concerns on the embodiment. The figure which expanded and showed the principal part in FIG. The figure which expanded and showed the principal part in FIG. The schematic plan view which shows an example of the arrangement | positioning aspect of the furniture with a top plate which concerns on the embodiment. The schematic plan view which shows an example of the arrangement | positioning aspect of the furniture with a top plate which concerns on the embodiment. The front view which expanded and showed the part of the edge part vicinity. Whole perspective view of furniture with a top plate according to another embodiment of the present invention

Explanation of symbols

T1, T2, T1 '... Table (furniture with top plate)
DESCRIPTION OF SYMBOLS 1, a1 ... Top plate 1x ... Notch 2, a2 ... Support structure 21, a21 ... End leg 22 ... Intermediate leg 23, a23 ... Frame 3 ... Partition (optional member)
4 ... Option mounting part 5 ... Connecting part

Claims (7)

A top plate having a depth dimension suitable for a normal office desk, a support structure that supports the top plate from below, and an option mounting portion that is disposed at the center of the top plate in the depth direction and can be attached with an optional member. To do,
The support structure is provided with legs that support both ends of the top plate in the width direction, and extends horizontally in the width direction of the top plate and spaced apart in the depth direction of the top plate. Two frames are provided for each top plate and both ends are supported by legs, and the legs and the frame are detachable from each other;
One of said frames, only one end of the frame and another top fitted with furniture which has the same structure in a state of being supported on the legs, to those the other of the top fitted with furniture other frame and the other end of the frame It is provided with a recess for enabling connection in a direction perpendicular to the connection part,
A furniture with a top plate, characterized in that the top plate can be positioned at a position where a portion of the support structure opposite to the other frame from the one frame is exposed to the upper space. 2. The ceiling according to claim 1, wherein the connecting portion is formed by engaging a protrusion protruding in the extending direction of the frame and a recess formed in another frame extending in a direction orthogonal to the frame. Furniture with boards. The furniture with a top plate according to claim 1 or 2, wherein the option mounting portion is formed by using a notch provided in a central portion of both side edges of the top plate. 4. The furniture with a top plate according to claim 1, wherein the top plate and the support structure have symmetrical shapes. 5. The furniture with a top plate according to claim 1, wherein the optional member is a partition. The furniture with a top plate according to claim 1, 2, 3, or 4, wherein the optional member is a shelf. 5. The furniture with a top plate according to claim 1, wherein the optional member is a storage.

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