Furniture with tabletop and extension tabletop

Abstract

To solve the problem in which: a pressing mark or damage is easily left on a lower surface of a top plate body when an extended top plate is detachably attached to an end part of the top plate body.SOLUTION: A furniture with a top plate as a desk comprises: a top plate body 3; and an extended top plate 4 which is fixed to an end part of the top plate body 3 with a tightening mechanism K. The extended top plate 4 includes: an upper surface side component 41 which is spliced to a top face 3a of the top plate body 3; and a lower surface side component 42 which faces a lower face 3b pf the top plate body 3. The tightening mechanism K includes a wedge member 5 which is pressed-in between the lower face 3b of the top plate body 3 and the lower surface side component 42 of the extended top plate 4.SELECTED DRAWING: Figure 12

Description

Technical Field

[0001] The present invention relates to a furniture with a top plate such as a school desk, and an extended top plate used for such furniture.

Background Art

[0002] Conventionally, in furniture with a top plate such as a school desk, there is known a structure in which an extended top plate is detachably attached to the unused end of a top plate body supported by legs (see, for example, Patent Document 1).

[0003] In such furniture with a top plate, it is common to fix the extended top plate to the top plate body by a tightening mechanism including a plurality of bolts screwed onto the extended top plate so as to be able to move up and down, and pressing members provided at the upper ends of these bolts.

[0004] However, in such a configuration, it is difficult to evenly press each pressing member against the lower surface of the top plate body, and there is a problem that a specific pressing member is pressed abnormally strongly, leaving a pressing mark or causing damage to the lower surface of the top plate body.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] The present invention has been made paying attention to the above, and an object thereof is to solve the problem that it is easy for a pressing mark to remain or for damage to occur on the lower surface of the top plate body when the extended top plate is detachably attached to the end of the top plate body.

Means for Solving the Problems

[0007] The furniture with a top plate according to claim 1 comprises a top plate body and an extension top plate fixed to the end of the top plate body using a fastening mechanism, wherein the extension top plate comprises an upper side member that is attached to the upper surface of the top plate body and a lower side member that faces the lower surface of the top plate body, and the fastening mechanism comprises a wedge member that is pressed between the lower surface of the top plate body and the lower side member of the extension top plate. Furthermore, the tightening mechanism comprises a wedge member, a feed screw for screwing the wedge member in and out, and an operating part for rotating the feed screw to move the wedge member in the press-fit or release direction, wherein the operating part is positioned in a location that is difficult to operate from the end of the top plate where it is used. It is.

[0008] The fixture with a top plate according to claim 2 is, A fixture with a tabletop comprising a tabletop body and an extension tabletop fixed to the end of the tabletop body using a fastening mechanism, wherein the extension tabletop comprises an upper side member that abuts against the upper surface of the tabletop body and a lower side member that faces the lower surface of the tabletop body, the fastening mechanism comprises a wedge member that is pressed between the lower surface of the tabletop body and the lower side member of the extension tabletop, the lower side member of the extension tabletop comprises an inclined surface that gradually rises in the direction in which the wedge member is pressed in, and the wedge member comprises an inclined lower surface that slidably abuts against the inclined surface and a horizontal upper surface that faces parallel to the lower surface of the tabletop body It is.

[0011] Claim 3 The claim for the fixture with a top plate according to the invention is that the fastening mechanism comprises a feed screw having the operating part at one end, and the feed screw is directly screwed into a female screw hole provided in the wedge member. 1 It is as described.

[0012] Claim 4 The extension tabletop according to the described invention is an extension tabletop that is fixed to the end of the tabletop body using a fastening mechanism, comprising an upper side member that is attached to the upper surface of the tabletop body and a lower side member that faces the lower surface of the tabletop body, wherein the fastening mechanism comprises a wedge member that is pressed between the lower surface of the tabletop body and the lower side member. The lower side member is provided with an inclined surface that gradually rises in the direction of press-fitting the wedge member, and the wedge member is provided with an inclined lower surface that slidably attaches to the inclined surface and a horizontal upper surface that faces the lower surface of the top plate body parallel to it. ru.

[0013] Claim 5 The expandable top plate according to the described invention is characterized in that the tightening mechanism comprises a wedge member, a feed screw for screwing the wedge member in and out, and an operating part for rotating the feed screw to move the wedge member in the press-fitting direction or the release direction. 4 It is as described.

[0015] Claim 6The extended top plate according to the described invention is such that the clamping mechanism includes the feed screw provided with the operation part at one end, and the feed screw is directly screwed into the female screw hole provided in the wedge member. Claim 5 is as described.

Effect of the Invention

[0016] According to the present invention, when the extended top plate is detachably attached to the non-use end portion of the top plate body, it is possible to solve the problem that pressing marks are likely to remain or the surface is likely to be damaged on the lower surface of the top plate body.

Brief Description of the Drawings

[0017] [Figure 1] An overall perspective view showing a desk according to an embodiment of the present invention. [Figure 2] A front view showing the desk according to the embodiment. [Figure 3] A rear view showing the desk according to the embodiment. [Figure 4] A plan view showing the desk according to the embodiment. [Figure 5] A right side view showing the desk according to the embodiment. [Figure 6] An exploded perspective view showing the desk according to the embodiment. [Figure 7] An overall perspective view showing the extended top plate according to the embodiment. [Figure 8] A plan view showing the extended top plate according to the embodiment. [Figure 9] A left side view showing the extended top plate according to the embodiment. [Figure 10] A cross-sectional view taken along line A-A in FIG. 8. [Figure 11] A cross-sectional view taken along line B-B in FIG. 8. [Figure 12] A cross-sectional view taken along line C-C in FIG. 8. [Figure 13] An exploded perspective view showing the extended top plate according to the embodiment. [Figure 14] A plan view showing the extended top plate according to another embodiment of the present invention. [Figure 15]An overall perspective view showing an extension top plate according to another embodiment of the present invention. [Figure 16] An overall perspective view showing an extension top plate according to another embodiment of the present invention. [Figure 17] An exploded perspective view showing the main parts of the extension top panel according to another embodiment of the present invention. [Figure 18] An exploded perspective view showing the main parts of the extension top panel according to another embodiment of the present invention. [Modes for carrying out the invention]

[0018] This embodiment applies the present invention to a desk D, such as a school desk, which is a piece of furniture with a tabletop.

[0019] As shown in Figures 1 to 6, this desk D has a tabletop 1 supported by legs 2. In this embodiment, the side of the tabletop 1 opposite the usable end 1a is referred to as the "front," and the usable end side 1b is referred to as the "rear."

[0020] As shown in Figures 1 to 6, the tabletop 1 comprises a tabletop body 3 supported by a leg body 2, and an extension tabletop 4 fixed to the end of the tabletop body 3 using a fastening mechanism K. The extension tabletop 4 comprises an upper side member 41 that is attached to the upper surface 3a of the tabletop body 3, and a lower side member 42 that faces the lower surface 3b of the tabletop body 3. As shown in Figures 7 and 10 to 12, the fastening mechanism K comprises a wedge member 5 that is pressed between the lower surface 3b of the tabletop body 3 and the lower side member 42 of the extension tabletop 4.

[0021] More specifically, the tabletop body 3 is made of wood and, for example, has a rectangular shape in plan view, and is attached to the upper end of the leg body 2 as shown in Figures 1 to 3, 5 and 6. The lower surface 3b of the tabletop body 3 is provided with a small storage shelf 31, etc., which is open at least on the side of the usable end 1b. The extension tabletop 4 is detachably attached to the end of the tabletop body 3 on the side opposite the usable end 1a.

[0022] As shown in Figures 7 to 13, the extension top plate 4 comprises an upper side member 41 whose upper surface 41a is continuous with the upper surface 3a of the top plate body 3 via a slight step, and whose lower surfaces 41b at both left and right ends and the lower surface 41c at the rear edge of the middle section are attached to the upper surface 3a of the top plate body 3, and a lower side member 42 facing the lower surface 3b of the top plate body 3, and is integrally molded from synthetic resin or the like.

[0023] As shown in Figures 8 and 10-13, the upper side member 41 is a flat plate shape with both left and right ends extending in the direction of the usable end 1b, and as shown in Figures 9 and 13, a groove M that opens upward as described later is formed in the intermediate region. The upper side member 41 integrally includes first and second front edge hanging walls 411 and 412 hanging down from the front edge, a rear edge hanging wall 413 hanging down from the vicinity of the rear edge, and side edge hanging walls 414 hanging down from both left and right edges. The groove M is formed by the second front edge hanging wall 412, the rear edge hanging wall 413, the left and right side walls 415, and the first and second bottom walls 416 and 417. The groove M has two types of compartmentalized sections M1 and M2 at its bottom, which have different shapes. As will be described later, the first bottom wall 416 corresponds to the front compartmentalized section M1, and the second bottom wall 417 corresponds to the rear compartmentalized section M2.

[0024] As shown in Figures 8 and 10 to 13, the lower side member 42 is integrally formed on the inner surfaces of the left and right side edge hanging walls 414 and comprises an inclined wall 421 having an inclined surface that can face the lower surface 3b of the top plate body 3, and a crossing wall 422 provided in a crossing manner at the front end of the inclined wall 421. The crossing wall 422 is positioned to be continuous with the aforementioned rear edge hanging wall 413 and is integrated with the upper side member 41.

[0025] 41r is a rib connecting the first and second front edge hanging walls 411 and 412. 41s is a rib connecting the side edge hanging wall 414 to the side wall 415 of the groove M. 41t is a rib connecting the first front edge hanging wall 411 and the rear edge hanging wall 413 at both left and right ends of the upper side member. 42r is a rib for reinforcing the inclined wall 421.

[0026] As shown in Figures 12 and 13, the tightening mechanism K comprises a wedge member 5, a feed screw 6 for screwing the wedge member 5 in and out, and an operating part 7 for rotating the feed screw 6 to move the wedge member 5 in the press-fit or release direction. The operating part 7 is positioned in a location that is difficult to operate from the usable end 1b side of the top plate 1. Specifically, it is positioned so that it cannot be operated or even seen from the user's side when seated facing the usable end 1b of the top plate 1. In other words, the operating part 7 is positioned on the front surface of the intersecting wall 422 of the lower side member 42 so that it cannot be operated without going around to the opposite usable end 1a side of the top plate 1. In this embodiment, the operating part 7 is grip-shaped and configured so that the feed screw 6 can be rotated by directly gripping the operating part 7.

[0027] As shown in Figures 10 to 13, the lower side member 42 of the aforementioned extension top plate 4 has an inclined surface 42a that gradually rises in the direction of press-fitting (forward) of the wedge member 5. The wedge member 5 has an inclined lower surface 5a that slidably attaches to the inclined surface 42a and a horizontal upper surface 5b that faces parallel to the lower surface 3b of the top plate body 3. In this embodiment, a handle portion 42k is provided on the lower surface of the lower side member 42 at the location corresponding to the wedge member 5, making it easier to grip the furniture when the extension top plate A4 is attached.

[0028] More specifically, as shown in Figures 12 and 13, the tightening mechanism K is equipped with a feed screw 6 having an operating part 7 at one end, and the feed screw 6 is directly screwed into a female screw hole 5h provided in the wedge member 5. That is, the lower side member 42 is provided with a screw insertion hole 42h that diagonally penetrates the inclined wall 421 and the intersecting wall 422. The feed screw 6 inserted from the intersecting wall 422 side is exposed on the inclined surface 42a (upper surface) of the inclined wall 421 and screwed into the female screw hole 5h of the wedge member 5. The screw insertion hole 42h has an elongated cross-section that allows the feed screw 6 to move parallel in the vertical direction, and is configured so that when the wedge member 5 moves back and forth along the inclined surface 42a due to the rotation of the feed screw 6, the feed screw 6 can also move parallel in the vertical direction. Furthermore, a guide portion is provided between the lower side member 42 and the wedge member 5, which is formed by engaging a guide groove 42m extending in the front-rear direction provided on the lower side member 42 with a projection 51 that protrudes from the lower surface of the wedge member 5 and slidably engages with the guide groove 42m, in order to guide the wedge member 5 in the direction of movement.

[0029] The operation of this tightening mechanism K is as follows. First, the operating part 7 is operated to retract the wedge member 5 in the direction of the usable end 1b. As a result, the wedge member 5 descends along the inclined surface 42a, and a gap greater than the thickness of the top plate body 3 is formed between the upper surface of the wedge member 5 and the lower surface of the upper side member 41. After inserting the portion of the top plate body 3 near the non-usable end 1a into this gap, the operating part 7 is operated to advance the wedge member 5 in the press-fit direction, causing the upper surface of the wedge member 5 to be pressed against the lower surface 3b of the top plate body 3, and the wedge action strongly connects the extended top plate 4 and the top plate body 3.

[0030] The extension top panel 4 is detachably attached to the non-working end 1b of the top panel body 3 using the fastening mechanism K described above, and this extension top panel 4 has grooves M formed in it that can hold books, tablets, etc., in an upright position.

[0031] In other words, as shown in Figures 1, 4, 6, 8, and 11, the desk D has an upwardly opening groove M formed along the non-usable edge 1a of the tabletop 1, and the groove M has multiple compartments of different shapes at its bottom. More specifically, the groove M has a front compartment M1 and a rear compartment M2 adjacent to each other via a step that forms a difference in height, with the front compartment M1 set lower than the rear compartment M2. Furthermore, the left-right dimension of the rear compartment M2 is set smaller than the left-right dimension of the front compartment M1.

[0032] More specifically, as shown in Figures 1, 4, 6, 8, and 11, the groove M has a laterally elongated shape, formed by recessing the middle region of the upper side member 41 of the extension top plate 4 downwards. This groove M is formed between a second front edge hanging wall 412 that hangs down from the front edge of the upper side member 41 and a rear edge hanging wall 413 that hangs down from near the rear edge of the upper side member 41. Both the left and right ends are closed by side walls 415, and the lower end is closed by a first bottom wall 416 and a second bottom wall 417. The left and right side walls 415 are inclined to move further apart from each other as they move upwards. The first bottom wall 416 and the second bottom wall 417 are adjacent to each other front to back via a step portion 418 that forms a height difference, forming the aforementioned front section M1 and rear section M2. In this embodiment, the front compartment M1 is set lower than the rear compartment M2, and a discharge hole 416a for discharging waste is formed in the first bottom wall 416 that forms the front compartment M1. All corners inside the groove M have a smooth chamfered shape, and are designed to prevent waste from remaining inside. Furthermore, the upper end connection portion of the first front edge hanging wall 411 and the second front edge hanging wall 415 located on the front side of the groove M has a raised portion 419 that rises above the upper surface 41a of the upper surface member 41, and this raised portion 419 is designed to catch books, documents, etc. placed in the groove M and prevent them from tipping forward.

[0033] The legs 2 that support the tabletop 1, as described above, are made of ordinary pipe material, and as shown in Figures 1 to 3, 5 and 6, the tabletop 1 is fixed to a tabletop support frame 23 that connects the front leg columns 21 and the rear leg columns 22 front to back. In addition, it is equipped with a vertical frame 24 that connects the front leg columns 21 and the rear leg columns 22 near their lower ends, and a horizontal frame 25 that connects the left and right front leg columns 21 to each other. These vertical frame 24 and horizontal frame 25 are integrally constructed, for example, by bending a single pipe material.

[0034] Here, Figure 1 is an overall perspective view showing the desk D according to this embodiment. Figure 2 is a front view thereof (viewed from the user's side, seated facing the usable end 1b). Figure 3 is a rear view thereof. Figure 4 is a top view thereof. Figure 5 is a right side view thereof. Figure 6 is an exploded perspective view showing how the extension top plate 4 is attached to the main top plate body 3. Figure 7 is an overall perspective view showing the extension top plate 4 according to this embodiment. Figure 8 is a top view thereof. Figure 9 is a left side view thereof. Figure 10 is a cross-sectional view along line AA in Figure 8. Figure 11 is a cross-sectional view along line BB in Figure 8. Figure 12 is a cross-sectional view along line CC in Figure 8. Note that in Figures 10 to 12, the upper side of the extension top plate 4 is shown at the top and the lower side of the extension top plate 4 is shown at the bottom for clarity. Also, in Figures 11 and 12, the main top plate body 3 is shown with dashed lines. Figure 13 is an exploded perspective view showing the fastening mechanism K of the extension top plate 4. In Figure 13, the wedge member 5 is shown rotated 90 degrees to clearly illustrate its shape.

[0035] With a desk D configured in this way, the effective area of ​​the tabletop 1 can be changed as needed by attaching and detaching the extension tabletop 4 to the main tabletop 3. Furthermore, since the tightening mechanism K for fixing the extension tabletop 4 to the main tabletop 3 utilizes the wedge action of the wedge member 5, the wide surface area of ​​the wedge member 5 can be evenly pressed against the underside 3b of the main tabletop 3 to secure the extension tabletop 4. Therefore, even when tightened tightly, it has the advantage of being less likely to damage the underside of the main tabletop 3. Moreover, because it utilizes the wedge action, it also has the advantage of being less likely to loosen when subjected to vibration.

[0036] In this embodiment in particular, since the wedge member 5 is screwed in and moved back and forth by the lead screw 6, it is possible to firmly bite the wedge member 5 into a predetermined location, thereby ensuring secure fixing of the extension top plate 4.

[0037] Furthermore, the operating unit 7 for operating the tightening mechanism K is positioned in a location that is difficult to operate from the usable end 1b side of the tabletop 1, thus preventing problems such as the extension tabletop 4 coming off when someone using the desk D accidentally operates the operating unit 7.

[0038] Furthermore, since this tightening mechanism K directly screws the feed screw 6, which is rotated by the operating unit 7, into the female screw hole 5h provided in the wedge member 5, the number of parts can be minimized. Moreover, in this embodiment, the operating unit 7 can be directly gripped to rotate the feed screw 6, so the tightening operation of the wedge member 5 can be performed without using special tools.

[0039] It should be noted that the present invention is not necessarily limited to the embodiments described above, and various modifications are possible without departing from its spirit.

[0040] For example, the extension top panel is not necessarily limited to having grooves; it may also have only a top surface that is substantially continuous with the top surface of the main top panel.

[0041] Furthermore, the tightening mechanism for tightening the wedge member in the press-fitting direction is not limited to that of the above embodiment, but using the above embodiment allows for a reduction in the number of parts and simplification of the structure.

[0042] Furthermore, the furniture with a tabletop according to the present invention is not limited to desks for schoolchildren, but can be applied to various other types of furniture.

[0043] When applying this to various types of furniture, the extension top plate may be attached to the side edge of the top plate body rather than the opposite end of use. In this case, the same wedge-like action can be used for fastening.

[0044] In addition, instead of the extension top plate 4 and fastening mechanism K shown in the embodiment described above, an extension top plate A4 and fastening mechanism KK in the manner shown below with reference to Figures 14 to 17 may be adopted. These extension top plates A4 and fastening mechanisms KK are specifically designed with structural strength and the like in mind, and the same reference numerals are used for parts that are the same as or corresponding to those in the embodiment described above, and their description is omitted.

[0045] In this embodiment, the extended top plate A4 has a shape in which the inner end of the lower side member 42 extends inward, thereby expanding the joint area between the lower side member 42 and the trailing edge hanging wall 413 of the upper side member 41. Furthermore, in the tightening mechanism KK of this embodiment, the horizontal upper surface 5b of the wedge member 5 is formed by the upper edge of the rib, thereby reducing sliding friction within a range that does not reduce strength. Moreover, in this embodiment, the trailing edge hanging wall 414 of the upper side member 41 is formed by integrating the outer wall 414a and the inner wall 414b via a reinforcing rib 414c, and the lower side member 42 is integrally provided on the inner wall 414b.

[0046] Even with such an extended top plate A4 and fastening mechanism KK, the effects of the present invention can be obtained.

[0047] Furthermore, the configuration of the wedge member is not limited to that of the embodiment described above. For example, an anti-slip member may be provided on the upper surface that slides against the lower surface of the top plate body. The extension top plate B4 shown in Figure 18 uses a wedge member B5 as shown below in place of the wedge member 5 of the extension top plate A4 shown with reference to Figures 14 to 17. This wedge member B5 has a recessed portion B5x on its upper surface 5b, and a resin anti-slip member 52 is attached to this recessed portion B5x. In the embodiment shown in Figure 18, the configuration is the same as described above with reference to Figures 14 to 17, except for the wedge member B5, so the same reference numerals are used for corresponding parts and their explanation is omitted. The anti-slip member may also be attached to substantially the entire upper surface of the wedge member. Providing such an anti-slip member can prevent or suppress the wedge member from slipping off during temporary installation before tightening.

[0048] Furthermore, various modifications are permitted as long as they do not impair the spirit of the present invention. [Explanation of symbols]

[0049] D... Furniture with a tabletop (desk) 1… Tabletop 1b…Used end 3…Tabletop 3a... Top surface of the tabletop 3b...Underside of the tabletop 4. A4…Extendable tabletop 41…Upper side member 42…Bottom side member 42a...Slope surface 5...Wedge member 5a…Slanted bottom surface 5b…Horizontal top surface 5h... Female screw hole 6... Lead screw 7...Operation unit K, KK...Tightening mechanism

Claims

1. A furniture fixture with a tabletop, comprising a tabletop body and an extension tabletop fixed to the end of the tabletop body using a fastening mechanism, The extension top plate comprises an upper side member that is attached to the upper surface of the top plate body and a lower side member that faces the lower surface of the top plate body. The aforementioned fastening mechanism includes a wedge member that is pressed between the lower surface of the main top plate and the lower surface side member of the extension top plate. The aforementioned tightening mechanism comprises a wedge member, a feed screw for screwing the wedge member in and out, and an operating unit for rotating the feed screw to move the wedge member in the press-fitting direction or the release direction. A fixture with a tabletop, wherein the aforementioned operating section is positioned in a location that makes it difficult to operate from the end of the tabletop that is in use.

2. A furniture fixture with a tabletop, comprising a tabletop body and an extension tabletop fixed to the end of the tabletop body using a fastening mechanism, The extension top plate comprises an upper side member that is attached to the upper surface of the top plate body and a lower side member that faces the lower surface of the top plate body. The aforementioned fastening mechanism includes a wedge member that is pressed between the lower surface of the main top plate and the lower surface side member of the extension top plate. The lower side member of the extension top plate is provided with an inclined surface that gradually rises in the direction in which the wedge member is pressed in. A fixture with a top plate, wherein the wedge member comprises an inclined lower surface that slidably attaches to the inclined surface and a horizontal upper surface that faces parallel to the lower surface of the top plate body.

3. The fixture with a top plate according to claim 1, wherein the tightening mechanism is equipped with a feed screw having the operating part at one end, and the feed screw is directly screwed into a female screw hole provided in the wedge member.

4. An extension tabletop that is fixed to the end of the main tabletop body using a fastening mechanism, It comprises an upper side member that is attached to the upper surface of the tabletop body and a lower side member that faces the lower surface of the tabletop body, The aforementioned fastening mechanism includes a wedge member that is pressed between the lower surface of the top plate body and the lower surface side member. The aforementioned lower side member has an inclined surface that gradually rises in the direction of press-fitting the wedge member. An extension top plate in which the wedge member comprises an inclined lower surface that slidably attaches to the inclined surface and a horizontal upper surface that faces the lower surface of the top plate body parallel to it.

5. The extension top plate according to claim 4, wherein the tightening mechanism comprises the wedge member, a feed screw for screwing the wedge member in and out, and an operating part for rotating the feed screw to move the wedge member in the press-fitting direction or the release direction.

6. The extension top plate according to claim 5, wherein the tightening mechanism includes the feed screw having the operating part at one end, and the feed screw is directly screwed into the female screw hole provided in the wedge member.

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