JP2023162660A - Furniture with top plate and extended top plate - Google Patents

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

Application for application of Article 30, Paragraph 2 of the Patent Act (1) Publication date: December 1, 2021 to January 31, 2020 Publication location: Setagaya Elementary School attached to Tokyo Gakugei University Publication location: Tokyo Gakugei University attached Setagaya Elementary School (4-10-1 Fukasawa, Setagaya-ku, Tokyo) Publisher: KOKUYO Co., Ltd. (2) Publication date: February 21, 2020 See other publication dates, publication destinations, and publication locations (attached) Publication Destination: Ota Ward Board of Education, etc. See the release date, release location, and location (attached).Publication location: Ota Ward Office, etc.See the release date, location, and location (attached).Publisher: KOKUYO Co., Ltd.

The present invention relates to a fixture with a top plate, such as a school desk, and an extended top plate used in the fixture.

Conventionally, fixtures with top plates such as school desks have been known in which an extended top plate is removably attached to the unused end of a top plate body supported by legs (for example, Patent Document 1 reference).

Therefore, in such a fixture with a top plate, a tightening mechanism including a plurality of bolts screwed into the extended top plate so as to be able to move up and down, and a presser provided at the upper end of these bolts is used to secure the extended top plate. Generally, it is fixed to the main body of the top plate.

However, with this type of configuration, it is difficult to press each presser evenly against the bottom surface of the top plate body, and a particular presser may be pressed abnormally hard, leaving pressure marks or scratches on the bottom surface of the top plate body. There is a problem that it is easy to get stuck.

Design Registration No. 1697030 Publication

The present invention has been made with the above-mentioned in mind, and when an extended top plate is removably attached to the end of the top plate body, it is easy to leave pressure marks or scratches on the bottom surface of the top plate body. The purpose is to solve the problem.

The fixture with a top plate according to the invention according to claim 1 is a fixture with a top plate comprising a top plate main body and an extended top plate fixed to an end of the top plate main body using a tightening mechanism. The extended top plate includes an upper surface side member attached to the upper surface of the top plate main body, and a lower surface side member facing the lower surface of the top plate main body, and the tightening mechanism is configured to tighten the top plate. The device includes a wedge member that is press-fitted between the lower surface of the main body and the lower surface side member of the expansion top plate.

In the fixture with a top plate according to the invention as set forth in claim 2, the tightening mechanism includes the wedge member, a feed screw that screws the wedge member forward and backward, and rotates the feed screw to move the wedge member in a press-fitting direction. The device according to claim 1, further comprising an operation portion for moving in the detachment direction.

The fixture with a top plate according to the invention set forth in claim 3 is the fixture according to claim 2, wherein the operating portion is disposed at a position that is difficult to operate from the use end side of the top plate.

In the fixture with a top plate according to the invention as set forth in claim 4, the lower surface side member of the extended top plate is provided with an inclined surface that becomes gradually higher in the direction of press-fitting the wedge member, and the wedge member is The device according to claim 1, further comprising: an inclined lower surface slidably attached to the inclined surface; and a horizontal upper surface facing parallel to the lower surface of the top plate main body.

In the fixture with a top plate according to the invention as set forth in claim 5, the tightening mechanism includes the feed screw provided with the operating portion at one end, and the feed screw is inserted into a female threaded hole provided in the wedge member. According to claim 2, 3 or 4, it is directly screwed together.

The extended top plate according to the invention described in claim 6 is an extended top plate fixed to an end of the top plate main body using a tightening mechanism, and includes an upper surface side member attached to the upper surface of the top plate main body, and a top plate. and a lower surface side member facing the lower surface of the main body, and the tightening mechanism includes a wedge member press-fitted between the lower surface of the top plate main body and the lower surface side member.

In the expansion top plate according to the invention set forth in claim 7, the tightening mechanism includes the wedge member, a feed screw that screws the wedge member back and forth, and rotates the feed screw to move the wedge member in the press-fitting direction or 7. The device according to claim 6, further comprising an operation portion for moving in the detachment direction.

In the expansion top plate according to the invention as set forth in claim 8, the lower surface side member is provided with an inclined surface that gradually becomes higher in the direction of press-fitting the wedge member, and the wedge member slides on the inclined surface. 7. The device according to claim 6, further comprising an inclined lower surface that can be attached to the lower surface of the top plate body, and a horizontal upper surface that faces the lower surface of the top plate main body in parallel.

In the expansion top plate according to the invention as set forth in claim 9, the tightening mechanism includes the feed screw having the operating portion provided at one end, and the feed screw is inserted into the female threaded hole provided in the wedge member. The structure according to claim 6 is directly screwed together.

According to the present invention, it is possible to solve the problem that when an extended top plate is removably attached to the unused end of the top plate main body, pressure marks are easily left on the bottom surface of the top plate main body or scratches are easily caused. can.

FIG. 1 is an overall perspective view showing a desk according to an embodiment of the present invention. FIG. 3 is a front view showing the desk according to the embodiment. FIG. 3 is a rear view showing the desk according to the embodiment. FIG. 3 is a plan view showing the desk according to the same embodiment. FIG. 3 is a right side view showing the desk according to the same embodiment. FIG. 3 is an exploded perspective view showing the desk according to the embodiment. FIG. 3 is an overall perspective view showing the extended top plate according to the embodiment. FIG. 3 is a plan view showing the extended top plate according to the same embodiment. FIG. 3 is a left side view showing the extended top plate according to the embodiment. 9 is a cross-sectional view taken along line AA in FIG. 8. FIG. 9 is a sectional view taken along line BB in FIG. 8; FIG. 9 is a sectional view taken along line CC in FIG. 8; FIG. 3 is an exploded perspective view showing the extended top plate according to the embodiment. FIG. 7 is a plan view showing an extended top plate according to another embodiment of the present invention. FIG. 7 is an overall perspective view showing an extended top plate according to another embodiment of the present invention. FIG. 7 is an overall perspective view showing an extended top plate according to another embodiment of the present invention. FIG. 7 is an exploded perspective view showing main parts of an extended top plate according to another embodiment of the present invention. FIG. 7 is an exploded perspective view showing main parts of an extended top plate according to another embodiment of the present invention.

In this embodiment, the present invention is applied to a desk D, such as a school desk, which is a fixture with a top plate.

This desk D includes a top plate 1 supported by legs 2, as shown in FIGS. 1 to 6. In addition, in this embodiment, the non-use end 1a side of the top plate 1 will be described as the "front" and the use end side 1b as the "rear".

As shown in FIGS. 1 to 6, the top board 1 includes a top board main body 3 supported by legs 2, and an extended top board 4 fixed to the ends of the top board main body 3 using a tightening mechanism K. It is equipped with. The extended top plate 4 includes an upper surface side member 41 attached to the upper surface 3a of the top plate main body 3, and a lower surface side member 42 facing the lower surface 3b of the top plate main body 3, and the tightening mechanism K is As shown in FIGS. 7 and 10 to 12, the wedge member 5 is press-fitted between the lower surface 3b of the top plate main body 3 and the lower surface side member 42 of the extended top plate 4.

Specifically, the top plate body 3 is made of wood and has a rectangular shape in plan view, for example, and is fixed to the upper end of the legs 2 as shown in FIGS. 1 to 3, 5, and 6. ing. The lower surface 3b of the top plate main body 3 is provided with an accessory storage shelf 31 opened at least toward the use end 1b. An extended top plate 4 is detachably attached to the end portion of the top plate main body 3 on the non-use end side 1a.

As shown in FIGS. 7 to 13, the extended top plate 4 has an upper surface 41a that is continuous with the upper surface 3a of the top plate main body 3 via a slight step, and a lower surface 41b at both left and right ends and a rear edge portion in the middle. The lower surface 41c includes an upper surface side member 41 attached to the upper surface 3a of the top plate main body 3, and a lower surface side member 42 facing the lower surface 3b of the top plate main body 3, and is integrally molded from synthetic resin or the like. There is.

As shown in FIGS. 8 and 10 to 13, the upper surface side member 41 has a flat plate shape with both left and right ends extending in the direction of the use end 1b, and as shown in FIGS. As will be described later, a groove M is formed which is open upward. The upper side member 41 includes first and second leading edge hanging walls 411 and 412 hanging from the front edge, a trailing edge hanging wall 413 hanging from the vicinity of the rear edge, and side edge hanging walls hanging from the left and right side edges. It is integrally equipped with a wall 414. The groove M is formed by a second leading edge hanging wall 412, a trailing edge hanging wall 413, left and right side walls 415, and first and second bottom walls 416 and 417. The groove M is provided with two types of compartments M1 and M2, front and rear, having different shapes at the bottom, and as described later, the first bottom wall 416 corresponds to the front compartment M1, The second bottom wall 417 corresponds to the rear section M2.

As shown in FIGS. 8 and 10 to 13, the lower surface side member 42 is integrally formed on the inner surface of the left and right side edge hanging walls 414, and is capable of facing the lower surface 3b of the top plate main body 3. It includes an inclined wall 421 having an inclined surface, and an intersecting wall 422 provided at the front end of the inclined wall 421 in an intersecting state. The intersecting wall 422 is positioned so as to be continuous with the trailing edge hanging wall 413 described above and is integrated with the upper surface side member 41.

Note that 41r is a rib that connects the first and second front edge hanging walls 411 and 412. 41s is a rib that connects the side edge hanging wall 414 and the side wall 415 of the groove M. 41t is a rib that connects the first leading edge hanging wall 411 and the trailing edge hanging wall 413 at both left and right ends of the upper surface side member. 42r is a rib for reinforcing the inclined wall 421.

As shown in FIGS. 12 and 13, the tightening mechanism K includes a wedge member 5, a feed screw 6 that screws the wedge member 5 forward and backward, and rotates the feed screw 6 to move the wedge member 5 in the press-fitting direction or The operating section 7 is arranged in a position that is difficult to operate from the use end 1b side of the top plate 1. Specifically, it is placed in such a position that it is not only inoperable but also invisible to the user sitting facing the use end 1b of the top plate 1. That is, the operating section 7 is arranged on the front surface of the intersecting wall 422 of the lower surface side member 42 so that it cannot be operated unless it goes around to the non-use end 1a side of the top plate 1. In this embodiment, the operating section 7 is a grip-shaped member configured so that the operating section 7 can be directly gripped and the feed screw 6 can be rotated.

As shown in FIGS. 10 to 13, the lower surface side member 42 of the expansion top plate 4 described above is provided with an inclined surface 42a that gradually becomes higher toward the press-fitting direction (front) of the wedge member 5. 5 is provided with an inclined lower surface 5a that is slidably attached to the inclined surface 42a, and a horizontal upper surface 5b that faces the lower surface 3b of the top plate main body 3 in parallel. Further, in this embodiment, a handle portion 42k is provided on the lower surface of the lower surface side member 42 at a location corresponding to the wedge member 5, so that the fixture with the extended top plate A4 attached thereto can be easily grasped.

Specifically, as shown in FIGS. 12 and 13, the tightening mechanism K is equipped with a feed screw 6 provided with an operating portion 7 at one end, and the feed screw 6 is attached to a wedge member 5. It is directly screwed into the female screw hole 5h. That is, the lower surface side member 42 is provided with a screw insertion hole 42h that diagonally passes through 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 is screwed into the female screw hole 5h of the wedge member 5. The screw insertion hole 42h has an elongated cross section so that the feed screw 6 can move in parallel in the vertical direction, and 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 is configured to be able to move in parallel in the vertical direction as well. Note that between the lower surface side member 42 and the wedge member 5, a guide groove 42m extending in the front-rear direction provided in the lower surface side member 42 and a guide groove 42m protruding from the lower surface of the wedge member 5 are provided in order to guide the forward and backward directions of the wedge member 5. A guide portion is provided that engages with a projection 51 that slidably engages with the guide groove 42m.

The operation of this tightening mechanism K will be explained as follows. First, the wedge member 5 is moved backward toward the use end 1b by operating the operating portion 7. As a result, the wedge member 5 descends along the inclined surface 42a, and a gap larger 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 surface side member 41. When the part of the top plate main body 3 near the unused end 1a is inserted into the gap and the wedge member 5 is moved forward in the press-fitting direction by operating the operating section 7, the upper surface of the wedge member 5 is inserted into the top plate main body 3. The expansion top plate 4 and the top plate main body 3 are strongly connected by the wedge action.

The extended top plate 4 is removably attached to the non-use end 1b of the top plate main body 3 using the tightening mechanism K as described above, and books, tablets, etc. can be placed on this extended top plate 4 in an upright position. A groove M is formed in which the material can be held.

That is, as shown in FIGS. 1, 4, 6, 8, and 11, this desk D has an upwardly open groove M formed along the unused end 1a of the top plate 1. The groove M is provided with a plurality of types of partitioned portions having mutually different shapes at the bottom. To be more specific, the groove M has a front section M1 and a rear section M2 arranged adjacent to each other via a step forming a height difference, and the front section M1 is adjacent to the rear section M2. It is set lower than M2. The left-right dimension of the rear divided portion M2 is set smaller than the left-right dimension of the front divided portion M1.

To be more specific, the groove M is a lateral groove in which the intermediate region of the upper surface side member 41 of the extended top plate 4 is depressed downward, as shown in FIGS. 1, 4, 6, 8, and 11. It has an elongated shape. This groove M is formed between a second leading edge hanging wall 412 hanging from the front edge of the upper side member 41 and a trailing edge hanging wall 413 hanging from the vicinity of the rear edge of the upper side member 41. 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 so as to be spaced apart from each other as they go upward. The first bottom wall 416 and the second bottom wall 417 are adjacent to each other in the front and back via a step 418 that forms a height difference, and the above-mentioned front section M1 and rear section M2 are formed. ing. In the case of this embodiment, the front section M1 is set at a lower level than the rear section M2, and the first bottom wall 416 forming the front section M1 is provided with a wall for discharging waste. A discharge hole 416a is formed. All the corners inside the groove M have a smooth chamfered shape, and are designed to prevent dirt from remaining inside. Note that, at the upper end connecting portion of the first leading edge hanging wall 411 and the second leading edge hanging wall 415 located on the front side of the groove M, a raised portion 419 that rises above the upper surface 41a of the upper surface side member 41 is formed. This raised portion 419 can catch books, documents, etc. placed in the groove M and prevent them from falling forward.

The legs 2 that support the top plate 1 described above are made of ordinary pipe material, and as shown in FIGS. The top plate 1 is fixedly attached to a top plate support frame 23 that is connected to the top plate support frame 23. It also includes a vertical frame 24 that connects the front and rear pillars 21 and 22 front and rear near their lower ends, and a horizontal frame 25 that connects the left and right front pillars 21 to each other. The horizontal frame 25 is, for example, integrally formed by bending a single pipe material.

Here, FIG. 1 is an overall perspective view showing a desk D according to this embodiment. FIG. 2 is a front view of the same (a view seen from the side of the user sitting facing the use end 1b). FIG. 3 is a rear view of the same. FIG. 4 is a plan view of the same. FIG. 5 is a right side view of the same. FIG. 6 is an exploded perspective view showing how the extended top plate 4 is attached to the top plate main body 3. FIG. 7 is an overall perspective view showing the extended top plate 4 according to this embodiment. FIG. 8 is a plan view of the same. FIG. 9 is a left side view of the same. FIG. 10 is a sectional view taken along line AA in FIG. 8. FIG. 11 is a cross-sectional view taken along line BB in FIG. 8. FIG. 12 is a sectional view taken along line CC in FIG. 8. In addition, in FIGS. 10 to 12, the upper side of the extended top plate 4 is shown at the top and the lower side of the extended top plate 4 is shown at the bottom for the sake of clarity. Further, in FIGS. 11 and 12, the top plate main body 3 is shown with imaginary lines. FIG. 13 is an exploded perspective view showing the tightening mechanism K of the extended top plate 4. As shown in FIG. In FIG. 13, in order to clearly show the shape of the wedge member 5, the wedge member 5 is shown rotated by 90 degrees.

With the desk D having such a configuration, the effective area of the top plate 1 can be changed as necessary by attaching and detaching the extended top plate 4 to the top plate main body 3. Moreover, since the tightening mechanism K for fixing the extended top plate 4 to the top plate main body 3 utilizes the wedge action of the wedge member 5, a large area of the wedge member 5 can be attached to the lower surface 3b of the top plate main body 3. The extended top plate 4 can be fixed by pressing it evenly. Therefore, there is an advantage that the lower surface of the top plate main body 3 is hard to be damaged even if the top plate main body 3 is tightened strongly. Moreover, since it utilizes a wedge action, it also has the advantage of being less likely to loosen even when subjected to vibrations.

In particular, in this embodiment, since the wedge member 5 is screwed back and forth by the feed screw 6, it is possible to forcefully bite the wedge member 5 into a predetermined location, and the expansion top plate 4 can be securely fixed. becomes.

In addition, since the operating section 7 for operating this tightening mechanism K is arranged in a position that is difficult to operate from the use end 1b side of the top plate 1, a person using the desk D may casually enter the operating section 7. It is possible to prevent a problem in which the extension top plate 4 comes off due to the operation.

Further, in this tightening mechanism K, the feed screw 6 rotated by the operation part 7 is directly screwed into the female screw hole 5h provided in the wedge member 5, so that the number of parts can be kept to a minimum. can. Furthermore, in this embodiment, the feed screw 6 can be rotated by directly gripping the operating section 7, so the wedge member 5 can be tightened without using any special tools. can.

Note that the present invention is not necessarily limited to the above-described embodiments, and various modifications can be made without departing from the spirit thereof.

For example, the extended top plate is not necessarily limited to having a groove, and may have only an upper surface that is substantially continuous with the upper surface of the top plate main body.

Further, the tightening mechanism for tightening the wedge member in the press-fitting direction is not limited to that of the embodiment described above, but if it is configured as in the embodiment described above, the number of parts can be reduced and the configuration can be simplified.

Furthermore, the fixture with a top plate of the present invention is applicable not only to desks for school children but also to various fixtures.

When applied to various fixtures, the extended top plate may be attached to the side end of the top plate body instead of the unused end. At that time, tightening using a similar wedge action is also possible.

In addition, instead of the extended top plate 4 and tightening mechanism K shown in the embodiment described above, an extended top plate A4 and a tightening mechanism KK as shown below with reference to FIGS. 14 to 17 are adopted. Good too. These extended top plate A4 and tightening mechanism KK were specifically designed in consideration of structural strength, etc., and the same reference numerals are given to the same or corresponding parts as those in the above-mentioned embodiment. The explanation will be omitted.

The extended top plate A4 of this embodiment has a shape in which the inner end of the lower surface side member 42 extends inward, and the joint area between the lower surface side member 42 and the trailing edge hanging wall 413 of the upper surface side member 41. is expanding. Further, 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, and sliding friction is reduced within a range where the strength is not reduced. Further, in this embodiment, the side edge hanging wall 414 of the upper surface side member 41 is formed by integrating an outer wall 414a and an inner wall 414b via reinforcing ribs 414c, and the lower surface side member 42 is integrally provided on the inner wall 414b. .

Even if such an extended top plate A4 and tightening mechanism KK are used, the effects of the present invention can be obtained.

Further, the structure of the wedge member is not limited to that of the embodiment described above, and for example, an anti-slip member may be provided on the upper surface that slides into contact with the lower surface of the top plate main body. The extended top plate B4 shown in FIG. 18 employs a wedge member B5 as shown below in place of the wedge member 5 of the extended top plate A4 shown with reference to FIGS. 14 to 17. This wedge member B5 has a concave portion B5x provided on its upper surface 5b, and a resin-made non-slip member 52 is attached to this concave portion B5x. Note that in the embodiment shown in FIG. 18, the components other than the wedge member B5 have the same configuration as that described above with reference to FIGS. 14 to 17, so corresponding parts are given the same reference numerals and explanations will be omitted. . Further, the anti-slip member may be attached to substantially the entire upper surface of the wedge member. By providing such an anti-slip member, it is possible to prevent or suppress the wedge member from slipping during temporary attachment before tightening.

In addition, various changes may be made without departing from the spirit of the present invention.

D... Fixtures with top plate (desk)
1...Top plate 1b...Used end 3...Top plate main body 3a...Top surface of top plate main body 3b...Bottom surface of top plate main body 4, A4...Extended top plate 41...Top side member 42...Bottom side member 42a...Slanted surface 5... Wedge member 5a...Slanted lower surface 5b...Horizontal upper surface 5h...Female screw hole 6...Feed screw 7...Operation section K, KK...Tightening mechanism

Claims (9)

A fixture with a top plate comprising a top plate body and an extended top plate fixed to an end of the top plate body using a tightening mechanism,
The extended top plate includes an upper side member attached to the upper surface of the top plate main body, and a lower side member facing the lower surface of the top plate main body,
A fixture with a top plate, wherein the tightening mechanism includes a wedge member press-fitted between the lower surface of the top plate main body and the lower side member of the extended top plate. The tightening mechanism includes the wedge member, a feed screw that screws the wedge member forward and backward, and an operation section that rotates the feed screw to move the wedge member in a press-fitting direction or a detaching direction. A fixture with a top plate according to claim 1. 3. The fixture with a top plate according to claim 2, wherein the operating portion is arranged in a position that is difficult to operate from the use end side of the top plate. The lower surface side member of the expansion top plate is provided with an inclined surface that gradually becomes higher toward the press-fitting direction of the wedge member,
2. The fixture with a top plate according to claim 1, wherein the wedge member includes an inclined lower surface slidably attached to the inclined surface, and a horizontal upper surface facing parallel to the lower surface of the top plate main body. Claim 2, 3, or 4, wherein the tightening mechanism includes the feed screw having the operating portion at one end, and the feed screw is directly screwed into a female threaded hole provided in the wedge member. Fixtures with top plate as described. An extended top plate fixed to an end of the top plate main body using a tightening mechanism,
It comprises an upper surface side member attached to the upper surface of the top plate main body, and a lower surface side member facing the lower surface of the top plate main body,
An expanded top plate, wherein the tightening mechanism includes a wedge member press-fitted between a lower surface of the top plate main body and the lower surface side member. The tightening mechanism includes the wedge member, a feed screw that screws the wedge member forward and backward, and an operation section that rotates the feed screw to move the wedge member in a press-fitting direction or a detaching direction. The expansion top plate according to claim 6. The lower surface side member is provided with an inclined surface that gradually becomes higher toward the press-fitting direction of the wedge member,
7. The extended top plate according to claim 6, wherein the wedge member includes an inclined lower surface slidably attached to the inclined surface, and a horizontal upper surface facing parallel to the lower surface of the top plate main body. 7. The expandable roof according to claim 6, wherein the tightening mechanism includes the feed screw having the operating portion at one end, and the feed screw is directly screwed into a female threaded hole provided in the wedge member. Board.

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