Top plate unit, desk and work table

Abstract

To provide a desk and work table with a top plate unit that can also be used for protecting a person from an object falling from a surrounding area due to an earthquake or the like when the person uses the desk or work table.SOLUTION: A top plate unit 100 includes: a first top plate 10; a second top plate 20 that can expand to be placed in front of the first top plate 10; and two leg parts 30a and 30b supporting the second top plate 20 in the state that the second top plate 20 expands to be placed in front of the first top plate 10. The second top plate 20 is formed of a plate material having an uneven structure on at least either of an upper surface and a lower surface.SELECTED DRAWING: Figure 1B

Description

[Technical field]

[0001] The present invention relates to a tabletop unit, a desk and a workbench. [Background technology]

[0002] For example, Patent Document 1 discloses a double-top desk that provides a sufficient area for placing and storing items and allows the work area to be expanded as needed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6558712 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the double-top desk of Patent Document 1 does not assume that people will hide under the top or be protected by the top. In the expanded state, there is not enough space under the top to hide, and the desk is not strong enough to protect people from falling objects.

[0005] Therefore, an object of the present invention is to provide a desk and workbench equipped with a top panel unit that can also be used to protect oneself from falling objects from the surrounding area in the event of an earthquake or the like when using the desk or workbench. [Means for solving the problem]

[0006] According to an embodiment of the present invention, there are provided solutions as described in the following items.

[0007] [Item 1] The first top plate, a second tabletop that can be extended and disposed in front of the first tabletop; two legs that support the second tabletop when the second tabletop is extended and disposed in front of the first tabletop; having The second top plate is formed of a plate material having an uneven structure on at least one of an upper surface and a lower surface, the top plate unit.

[0008] [Item 2] The top plate unit described in item 1, wherein the second top plate is supported on the underside of the first top plate in a state approximately parallel to the first top plate so as to be slidable in an extended position in front of the first top plate.

[0009] [Item 3] The tabletop unit described in item 2 further comprises a support member provided on the underside of the first tabletop and having a groove that receives an end including a side of the second tabletop.

[0010] [Item 4] The tabletop unit described in item 2 or 3, further comprising a fixing member that prevents the second tabletop from sliding when the second tabletop is extended in front of the first tabletop.

[0011] [Item 5] A tabletop unit according to any one of items 1 to 4, wherein each of the two legs has a caster.

[0012] [Item 6] 6. The tabletop unit according to any one of items 1 to 5, wherein the plate material having the uneven structure is made of an aluminum alloy.

[0013] [Item 7] 7. The tabletop unit according to any one of items 1 to 6, wherein the first tabletop is made of an aluminum alloy.

[0014] [Item 8] A tabletop unit according to items 1 to 7, A support structure for supporting the top board unit; A desk or workbench having: Effect of the Invention

[0015] According to an embodiment of the present invention, a desk and workbench are provided that include a top unit that can also be used to protect oneself from falling objects from the surroundings in the event of an earthquake or the like when using the desk or workbench. [Brief description of the drawings]

[0016] [Figure 1A] 1 is a schematic perspective view of a desk 200 according to an embodiment of the present invention in a normal state. [Figure 1B] 2 is a schematic perspective view of the desk 200 when an earthquake occurs. FIG. [Figure 2A] FIG. 13 is a schematic diagram showing a case where desks 200a, 200b, and 200c are left in a normal use state (the same as a conventional desk's use state) when an earthquake occurs. [Figure 2B] FIG. 13 is a schematic diagram showing the second top panels 20 of the desks 200a, 200b, and 200c in an expanded position when an earthquake occurs. [Figure 3A] This is a schematic diagram showing evacuation routes D1 and D2 when two islands of desks are left in their normal usage state (the same as conventional desk usage state) in the event of an earthquake. [Figure 3B] FIG. 13 is a schematic diagram showing evacuation routes D1 and D2 when the second tabletops 20 of a plurality of desks arranged in two islands are expanded in the event of an earthquake. [Figure 4] FIG. 2 is a schematic perspective view of a top board unit 100. [Diagram 5] FIG. 2 is a schematic perspective view of a first top plate 10. [Figure 6] FIG. 2 is a schematic perspective view of a support member 40. [Figure 7] 11 is a schematic partial enlarged view of the concave-convex structure as viewed in a direction perpendicular to the top surface of the second top plate 20A. FIG. [Figure 8] 13 is a schematic partial enlarged view of the concave-convex structure as viewed in a direction perpendicular to the top surface of the second top plate 20B. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, a tabletop unit, a desk, and a worktable according to an embodiment of the present invention will be described with reference to the drawings. The tabletop unit, the desk, and the worktable according to the embodiment of the present invention are not limited to those exemplified below.

[0018] 1A and 1B are schematic perspective views of a desk 200 according to an embodiment of the present invention. Fig. 1A shows a state of normal use, and Fig. 1B shows a state of use when an earthquake occurs.

[0019] The desk 200 has a top board unit 100 according to an embodiment of the present invention. The configuration other than the top board unit 100 is not limited to the example, and may have a wide range of configurations that are included in known desks.

[0020] The tabletop unit 100 comprises a first tabletop 10, a second tabletop 20 that can be extended in front of the first tabletop 10, and two legs 30a, 30b that support the second tabletop 20 when the second tabletop 20 is extended in front of the first tabletop 10, and the second tabletop 20 is formed from a plate material having an uneven structure on at least one of its upper and lower surfaces.

[0021] Here, the plate material having the uneven structure has sufficient rigidity to protect users from falling objects in the event of an earthquake. It is known that the strength can be improved by providing an uneven structure on the surface of a metal plate material. For example, a plate material formed of an aluminum alloy described in International Publication No. 2012 / 098787 by the present applicant can be suitably used. The entire disclosure of International Publication No. 2012 / 098787 is incorporated herein by reference. In addition, the present invention is not limited to this, and for example, a plate material used for a panel for a vehicle can also be used. The rigidity of the second top plate 20 is preferably 70 GPa or more. There is no particular upper limit, but it is preferably 85 GPa or less from the viewpoint of weight and cost.

[0022] As exemplified here, the second tabletop 20 is supported on the underside of the first tabletop 10 in a state substantially parallel to the first tabletop 10 so as to be slidable, for example, in a state in which it is extended in front of the first tabletop 10. For example, a groove that receives an end portion including a side surface of the second tabletop 20 may be provided in a support member 40 provided on the underside of the first tabletop 10, and the second tabletop 20 may be supported in a slidable manner by the groove (see FIG. 6).

[0023] To facilitate the user's sliding the second tabletop 20 to the extended position, a front panel 22 is provided on the front side of the second tabletop 20, and a handle 24 is provided on the front panel 22. These may be omitted.

[0024] The tabletop unit 100 further includes a fixing member 12 that prevents the second tabletop 20 from sliding when the second tabletop 20 is extended and disposed in front of the first tabletop 10. A known fixing member can be used as the fixing member 12. It is preferable to provide the fixing member 12 so that the second tabletop 20 does not return to a state in which the second tabletop 20 is disposed substantially parallel to the first tabletop 10 below the first tabletop 10 (so that the second tabletop 20 partially or entirely overlaps the first tabletop 10) as shown in FIG. 1A after the second tabletop 20 is extended and disposed in front of the first tabletop 10 as shown in FIG. 1B. The fixing member 12 may be omitted.

[0025] For example, the two legs 30a, 30b have casters 32a, 32b to facilitate pulling out the second tabletop 20 toward the front of the first tabletop 10. If stoppers are provided on the casters 32a, 32b, or if the casters 32a, 32b are omitted and the two legs 30a, 30b have a structure that makes them difficult to move, the fixing member 12 may be omitted.

[0026] Various known plate materials can be used for the first top plate 10. Similar to the second top plate 20, a plate material made of an aluminum alloy can be preferably used. The first top plate 10 may be painted by various known methods.

[0027] The desk 200 has a tabletop unit 100 and a support structure 300 that supports the tabletop unit 100. The support structure 300 may be a portion of a typical desk excluding the tabletop. In other words, the desk 200 is obtained by arranging the tabletop unit 100 instead of arranging a tabletop when assembling a known desk.

[0028] The support structure 300 of the desk 200 has a sleeve 52, a back panel 56, and support legs 54. The sleeve 52 has drawers 52a, 52b, and 52c. The support structure 300 illustrated here is a single-sleeve type, but is not limited to this, and may be a double-sleeve type or may not have a sleeve. A desk without a sleeve has a structure basically similar to that of a workbench. However, a workbench is generally stronger than an office desk 200, and often has a larger top surface area. The strength and size of the top panel unit 100 according to the embodiment of the present invention can be appropriately changed depending on the application.

[0029] As shown in FIG. 1A, in normal use, desk 200 is similar to known desks in that a personal computer F1, a telephone F2, etc. are placed on first top panel 10, and office work is performed on first top panel 10.

[0030] When an earthquake occurs, the second top panel 20 is extended and positioned in front of the first top panel 10 as shown in FIG. 1B. For example, the user H grasps the handle 24, slides the second top panel 20, and hides under the second top panel 20. The size of the second top panel 20 is, for example, approximately the same as that of the first top panel 10, and can adequately protect the entire body of the user H. Even if the personal computer F1 and the telephone F2 on the first top panel 10 move due to vibration, the space under the second top panel 20 is protected. In addition, even if an object falls from the ceiling or a shelf (neither of which are shown) due to vibration, the space under the second top panel 20 is protected.

[0031] A typical office desk 200 may be arranged in an island shape in an office. Fig. 2A is a schematic diagram of the desks 200a, 200b, and 200c in a normal use state (same as the use state of a conventional desk) when an earthquake occurs. Fig. 2B is a schematic diagram of the second top boards 20 of the desks 200a, 200b, and 200c in an extended position when an earthquake occurs.

[0032] As shown in Fig. 2A, in the event of an earthquake, the personal computer F1 and telephone F2 placed on the desks 200a, 200b, and 200c will fall to the floor and get in the way of the user's feet when evacuating. On the other hand, as shown in Fig. 2B, when the second tabletop 20 is extended, the body of the user H is protected and the personal computer F1 and telephone F2 are prevented from falling to the floor, and at least the personal computer F1 and telephone F2 are not scattered on the floor under the second tabletop 20. Therefore, the user H can evacuate by passing under the second tabletop 20.

[0033] 3A and 3B, an example will be described in which an island consisting of desks 200a1, 200b1, and 200c1 and an island consisting of desks 200a2, 200b2, and 200c2 are arranged back-to-back.

[0034] Figure 3A is a schematic diagram showing evacuation routes D1 and D2 when two island-shaped desks are left in their normal usage state (the same as conventional desks) when an earthquake occurs, and Figure 3B is a schematic diagram showing evacuation routes D1 and D2 when the second tops 20 of two island-shaped desks are expanded when an earthquake occurs.

[0035] As shown in Figure 3A, if the two island-like desks are left in their normal use state (the same as conventional desks) in the event of an earthquake, the personal computers F1 and telephones F2 will fall onto the floor along evacuation routes D1 and D2, impeding evacuation. On the other hand, if the second tops 20 of the desks are extended, the personal computers F1 and telephones F2 are prevented from falling onto the floor, and at least the personal computers F1 and telephones F2 are not scattered on the floor under the second tops 20, ensuring the evacuation routes D1 and D2 to the corridor.

[0036] In this way, when arranging a plurality of desks according to an embodiment of the present invention, an evacuation route can be ensured by arranging the plurality of desks side by side.

[0037] 4 shows a schematic perspective view of the tabletop unit 100. The tabletop unit 100 has a first tabletop 10, a second tabletop (not shown), a support member 40 that slidably supports the second tabletop 20, and two legs 30a, 30b that support the second tabletop 20. A front panel 22 is provided on the front side of the second tabletop 20, and a handle 24 is provided on the front panel 22. As shown typically in FIG. 5, a hole 10a is provided in the first tabletop 10, and the first tabletop 10 is fixed to the support member 40 by a bolt 10b.

[0038] The support member 40 is provided with a groove 42 as shown in Fig. 6. The groove 42 receives an end portion including a side surface of the second top plate 20 (not shown). The second top plate 20 is supported by the groove 42 in a state substantially parallel to the first top plate 10 so as to be slidable in an expanded position in front of the first top plate 10.

[0039] The second tabletop 20 only needs to be arranged so as to be extended in front of the first tabletop 10 in the event of an earthquake, and does not necessarily need to be arranged substantially parallel to the first tabletop 10 under the first tabletop 10 in normal use. For example, the second tabletop and two legs that support the second tabletop when the second tabletop is extended in front of the first tabletop may be arranged on the front side of the first tabletop so as to be substantially perpendicular to the first tabletop.

[0040] With reference to FIG. 7 and FIG. 8, a preferred example of a two-dimensional pattern of the uneven structure that the second top plate has on at least one of the upper surface and the lower surface will be described. FIG. 7 and FIG. 8 are schematic partial enlarged views of the uneven structure when viewed from a direction perpendicular to the upper surface of the second top plate 20A and 20B, respectively. The uneven structure (including the slope) is represented by light and dark. The patterns shown in FIG. 7 and FIG. 8 are described, for example, in the applicant's website, "Lightweight and High-Rigidity Aluminum Panel "SMART SHEET (Registered Trademark)", searched on May 12, 2023, on the Internet <URL: https: / / www.uacj.co.jp / products / sheeting / 07smartsheet.htm>.

[0041] The uneven structure of the second top plate 20A shown in FIG. 7 and the top plate 20B shown in FIG. 8 is formed by combining a plurality of convex portions and a plurality of concave portions extending in two mutually orthogonal directions (here, vertical and horizontal directions). The plurality of convex portions refer to, for example, portions protruding upward from a virtual plane that bisects the thickness of the second top plates 20A and 20B beyond half the thickness (assumed to be "t" mm) of the plates constituting each of the second top plates 20A and 20B, and the plurality of concave portions refer to portions protruding downward from a virtual plane that bisects the thickness of the second top plates 20A and 20B beyond half the thickness of the plates constituting each of the second top plates 20A and 20B. If the upper and lower surfaces are interchanged, the above is reversed. The thickness of the second top plates 20A and 20B, i.e., the length from the tip of the convex portion to the tip of the concave portion (the molding depth of the plate), is, for example, 10 times the thickness t of the plates constituting each of the second top plates. Moreover, the length of the projections and recesses extending in two directions is, for example, 40 times the thickness t.

[0042] The uneven structure when viewed from a direction perpendicular to the top surface of the second table top 20A shown in Fig. 7 is configured by combining multiple protrusions and multiple recesses extending in the up-down and left-right directions, and has a two-dimensional pattern in which four protrusions arranged in the shape of a swastika (or an inverted swastika) are repeatedly arranged. The uneven structure when viewed from a direction perpendicular to the top surface of the second table top 20B shown in Fig. 8 is configured by combining multiple protrusions and multiple recesses extending in the up-down and left-right directions, and has a two-dimensional pattern in which three protrusions arranged in the shape of an H are repeatedly arranged.

[0043] This type of uneven structure can improve rigidity while adding design. For example, by using an aluminum alloy plate, the mass can be reduced to about one-fifth while maintaining the same rigidity as a steel plate (based on a three-point bending test). In addition, the difference in rigidity depending on the bending direction can be reduced more than with a general wave. [Industrial Applicability]

[0044] A desk or workbench equipped with a top board unit according to an embodiment of the present invention makes it possible to protect a person from objects falling from the surroundings due to an earthquake or the like when using the desk or workbench. [Explanation of symbols]

[0045] 10 First Top Plate 20 Second Top 30a, 30b Legs 40 Support member 42 Groove 100 Top board unit 200 Desk 300 Support Structure

Claims

1. A first top plate; a second tabletop that can be extended and disposed in front of the first tabletop; two legs that support the second tabletop when the second tabletop is extended and disposed in front of the first tabletop; having The second top plate is formed of a plate material having an uneven structure on at least one of an upper surface and a lower surface, the top plate unit.

2. The tabletop unit according to claim 1 , wherein the second tabletop is supported on the underside of the first tabletop in a state approximately parallel to the first tabletop so as to be slidable in an extended position in front of the first tabletop.

3. The tabletop unit according to claim 2 , further comprising a support member provided on the underside of the first tabletop and having a groove for receiving an end portion including a side surface of the second tabletop.

4. 4. The tabletop unit according to claim 2, further comprising a fixing member that prevents the second tabletop from sliding when the second tabletop is extended in front of the first tabletop.

5. The tabletop unit according to claim 1 or 2, wherein each of the two legs has a caster.

6. The tabletop unit according to claim 1 or 2, wherein the plate material having the uneven structure is made of an aluminum alloy.

7. The tabletop unit according to claim 1 , wherein the first tabletop is made of an aluminum alloy.

8. A top plate unit according to claim 1 or 2, A support structure for supporting the top board unit; A desk or workbench having:

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