JPH1146873A - Study desk with movable top - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a movable-top-equipped study desk of a simple structure such that the height and effective depth of a top can be reduced by changing the mounting position of a main top at the front of the top so that even a user of small physique, while sitting, can reach a fixed top at the rear of the top and an upper rack provided on the fixed top, and that the fixed top can be used as a mid-rack. SOLUTION: A top is separated into a fixed top 3 secured to the rears of side legs 2, 2 and a main top 4 having a greater depth than the fixed top 3, and a pair of support members 5, 5 are mounted on both sides at the rear of the main top 4 in such a way as to project backward and are removably attached to different positions of the legs 2. The top can therefore be set in a high position in which the main top 4 continues with the front of the fixed top 3 as their respective upper surfaces are flush and a low position in which the rear edge of the main top 4 has receded to a position below the lower surface of the fixed top 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a replaceable learning table with a tabletop, and more particularly, to a height and an effective depth of a tabletop by changing a mounting position of a main tabletop according to a user's physique. The present invention relates to a learning desk with a replaceable top plate whose width can be changed.

[0002]

2. Description of the Related Art Conventionally, a steel desk in which a part of a top plate can be raised and lowered is provided as Japanese Utility Model Publication No. 63-18345. In the desk described in this publication, a fixed top plate is attached between the upper ends of leg plates having front edges rising vertically on both sides, and a vertically long hole is formed in an upper front edge of the leg plate, and a cross section is formed inwardly. A screw shaft having a U-shaped guide portion, a slide member inserted in the guide portion so as to be slidable, and a support bracket for an elevating top plate provided in front of a fixed top plate and the slide member passing through a long hole. The slide member is further provided with a locking pin which is elastically biased in a protruding direction, and is elastically engaged with a plurality of engagement holes arranged in parallel with the guide portion, so that the elevating top plate is fixed. It is a structure that maintains the height.

[0003] The desk described in this publication aims to place a computer keyboard on an elevating top plate and adjust its height so that workability is improved. In addition to being movable only, the depth width of the elevating top is set to a width that allows the keyboard to be placed thereon, so that it is sufficiently smaller than the depth width of the fixed top.

[0004] By the way, in the case of a learning desk used from an infant or a lower grade of elementary school, a structure in which a top board is raised and lowered so that the height can be adjusted according to the growth of a child has conventionally been the mainstream. However, when the top is moved up and down or the top is placed at the rear of the top and the top and the top are moved up and down at the same time, the moving parts are heavy and the lifting operation is difficult. Also, as junior high school students, high school students and children grow up, such learning desks with a top board become less preferred as their tastes change, so in recent years the desk top has been fixed and the chair seat The structure which can adjust the height of the mainstream has become mainstream.

[0005] However, any of the conventional desks of the height adjustment method only cope with a change in the height of the child.
In other words, when the height is low, the length of the hands is naturally short, so even if you adjust the height of the top plate and the chair, take the book from the upper shelf provided at the back of the top plate while sitting in the chair. The task of returning and returning is difficult.

[0006]

SUMMARY OF THE INVENTION In view of the above-mentioned situation, the present invention is intended to solve even a small-sized user with a fixed top plate at the rear of the top plate and an upper shelf provided on the fixed top plate. The height and effective depth of the tabletop can be reduced by changing the mounting position of the main tabletop at the front of the tabletop so that it can be reached while sitting in a chair, and the fixed tabletop can be used as a middle shelf An object of the present invention is to provide a learning desk with a top plate that can be easily replaced.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a fixed top plate having a top plate fixed to the rear portions of both legs, and a main top plate having a depth greater than the fixed top plate. The main top is fixed to the main top by attaching the pair of support members by projecting rearward at the rear portions on both sides of the main top, and detachably attaching the support members to different positions of the legs. A continuous high state with the top surfaces of each other flush with each other in front of the top plate,
A replaceable learning table with a tabletop is provided which can be set to a low state in which the rear edge of the main tabletop is located below the lower surface of the fixed tabletop and retreated.

More specifically, in the first invention, a support rod as the support member is fixed to the lower surface on both sides of the main top plate, and the two legs are located at positions closer to the lower surface of the fixed top plate, and further below and below the fixed top plate. Attachment of a mounting cylinder for removably engaging the support rod from the front at the rear position, engaging the support rod with one of the upper and lower mounting cylinders, and fixing the support rod to prevent it from falling off. It is.

According to a second aspect of the present invention, a bracket as the support member is mounted on the lower surface on both sides of the main top plate so that the front and rear positions can be changed. The hook at the rear end of the bracket is fitted and locked in a pair of engagement holes from above and below.

According to a third aspect of the present invention, a support rod is fixed to the lower surface on both sides of the main top plate as the support member, and the support rod is removably screwed to the inner surfaces of the two legs at different heights. It becomes.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a first embodiment of the present invention; 1 to 3 show the first embodiment.
Fig. 2 shows a mode (high state) used when the physique is close to that of an adult, and Fig. 3 shows a mode (low state) used when the physique is small.

A replaceable learning table 1 with a top plate according to the present invention.
Is a fixed top plate 3 in which the top plate is fixed to the rear portions of the legs 2 and 2
And a main top plate 4 having a depth greater than that of the fixed top plate 3. A pair of support members 5 and 5 are attached by projecting rearward from both rear portions of the main top plate 4. 5 is detachably attached to different positions of the legs 2, 2, so that the main top plate 4 is in a continuous high state in front of the fixed top plate 3 with the upper surfaces thereof flush with each other (FIG. 2). 3) and a low state (the state shown in FIG. 3) in which the rear edge of the main top plate 4 is located at a position retracted below the lower surface of the fixed top plate 3.

[0013] Specifically, the learning desk 1 according to the first invention comprises:
Plate-shaped legs 2, 2 are erected at predetermined intervals on both left and right sides, and the fixed top plate 3 is provided at the upper end thereof, and both legs 2, 2 below the front end of the fixed top plate 3. Is formed as an inclined edge 6 inclined obliquely downward and rearward by a predetermined length, and below the inclined edge 6, an inclined edge 7 inclined obliquely downward and forward is continuous. A lower shelf 8 extending rearward from the boundary is provided between the two legs 2. Although not shown, it is also possible to form an integrated upper shelf in which the upper portions of both legs 2 and 2 are extended upward and a shelf plate is provided between the extended portions. It is also possible to place a separate upper shelf, or to set up a panel on the back of the learning desk 1 and provide a shelf board on the front to constitute an upper shelf.

A support rod 9 as the support member 5 is fixed to the lower surface on both sides of the main top plate 4 with its rear portion protruding rearward, and the lower legs 2 and 2 are positioned closer to the lower surface of the fixed top plate 3. And mounting cylinders 10, 10 for engaging the support rods 9, 9 from the front so that they can be inserted and removed from the lower and rear positions, that is, positions closer to the lower surface of the lower shelf plate 8, respectively. 9 is engaged with one of the upper and lower mounting cylinders 10, 10, and each support rod 9 is fixed to the mounting cylinder 10 by screws 11. Here, the upper and lower mounting cylinders 10, 10
Have the same structure, and the supporting rod 9 can be attached and supported in exactly the same manner.

That is, as shown in FIG. 2, the support rods 9, 9 on both sides of the main top plate 4 are inserted into the upper mounting cylinders 10, 10 from the front, and the rear edge of the main top plate 4 is fixed to the fixed top plate. The front edge of the plate 3 is engaged until it is joined, and screws 11,
The main top plate 4 is attached to the front of the fixed top plate 3 so that the upper surfaces thereof are flush with each other by inserting the 11 and screwing it to the support rod 9. This state is called a high state. After the screws 11,... Are removed and the support rods 9, 9 are pulled out of the upper mounting cylinders 10, 10, as shown in FIG. 10,1
0 from the front, engage until the rear edge of the main top plate 4 and the front edge of the lower shelf plate 8 are joined, and insert the screws 11, 11 from the inner surface of the mounting cylinder 10 to the support rod 9. By screwing, the main top plate 4 is mounted in front of the lower shelf plate 8 so that the upper surfaces thereof are flush with each other. This state is called a low state. Here, the rear edge of the main top plate 4 and the front edge of the fixed top plate 3 are inclined surfaces parallel to the inclined edge 6 so as to be surely joined to each other. Is also a slope.

In the above-mentioned high state, the effective depth of the learning desk 1 is a wide width including the fixed top 3 and the main top 4, and the height of the main top 4 is high. This is a mode suitable for a user with a large physique. On the other hand, in the low state, the rear edge of the main top 4 is at a position retreated below the lower surface of the fixed top 3, so that the effective depth from the front end of the main top 4 to the rear end of the learning desk 1 is smaller. Since it is narrow and the height of the main top plate 4 is low, it is a mode suitable for a user with a small physique. The change between these modes can be easily performed only by inserting and removing the support rod 9 to and from the mounting cylinder 10 and replacing it.

In a high state, the lower shelf 8
Can be used literally as a shelf board, and in a low state, the lower shelf board 8 is flush with the main top board 4 to form a top board having a narrow depth, and a fixed ceiling board above it. The board 3 can be used as a middle shelf board.

Next, the second invention will be described with reference to FIGS. According to the present invention, the bracket 12 as the support member 5 is attached to the lower surface on both sides of the main top plate 4 so that the front and rear positions can be changed. Further, the downward hooks 14, 14 at the rear end of the bracket 12 are fitted and locked in the pair of engagement holes 13, 13 from above and below. Here, in a state where the downward hook 14 is fitted and locked in the engagement hole 13, appropriate retaining means for restricting the bracket 12 from being disengaged by ascending is taken.

More specifically, in the present embodiment, the leg 2 is made of hollow steel and the front surface 15 is set vertically, but the front surface of the leg 2 is inclined. However, the bracket 12 described later may be changed accordingly. Then, the fixed top plate 3 is fixed to the upper end of the leg 2 with its front end protruding forward from the front surface 15 of the leg 2. The bracket 12 can be replaced on the lower surface on both sides of the main top plate 4 by changing the front-rear position by the length of the front end of the fixed top plate 3 protruding from the front surface 15 of the leg 2. Has become. Specifically, forward hooks 16, 16 are provided on the lower surface of the main top plate 4, and the forward hooks 16, 1 are provided on the upper surface 17 of the bracket 12.
6 are formed to engage and lock the front hooks 16, 16 by selecting a plurality of engaging holes 18,.
2, the front and rear mounting positions can be changed.

That is, as shown in FIG. 4, the brackets 12, 12 are located at the rear mounting positions on the lower surfaces on both sides of the main top plate 4.
With the rear part protruding, the bracket 1
The downward hooks 14, 14 of the pair 2, 12 are fitted and locked in the upper pair of engagement holes 13, 13, and the main top plate 4 is attached to the front of the fixed top plate 3 with their upper surfaces flush with each other. (High state).
In this case, the front edge of the fixed top plate 3 and the rear edge of the main top plate 4 are surface-bonded, and the front hooks 16 and the engagement holes are formed so that the main top plate 4 does not move forward with respect to the bracket 12. 18
Are engaged. Since the downward hooks 14, 14 are inserted into the engaging holes 13, 13, and are engaged with the hooks 13, the front edge of the fixed top plate 3 and the rear edge of the main top plate 4 are separated from the rear edge of the main top plate 4. The edge has an inclined surface that can be joined to the front edge of the fixed top plate 3 from above. Also, after the brackets 12 are removed from the legs 2, as shown in FIG. 5, the brackets 12 are replaced on the lower surface on both sides of the main top plate 4 and at the front mounting position, that is, after the brackets 12, After replacing the end with a state in which the end coincides with the rear end of the main top plate 4, the downward hooks 14, 14 of the brackets 12, 12 are fitted and locked in the lower pair of engaging holes 13, 13 in the same manner as described above. The main top 4 is mounted below the fixed top 3 at a position where the rear edge of the main top 4 is retracted below the lower surface of the fixed top 3 (low state). Although not shown, it is preferable to mount the lower shelf plate 8 between the two legs 2 in such a manner that the upper surface is flush with the main top plate 4 in the low state.

Finally, the third invention will be described with reference to FIGS. In the present invention, a support rod 1 is used as the support member 5.
9 and 19 are fixed to the lower surface on both sides of the main top plate 4, and the support rods 19 and 19 are removably attached to the inner surfaces of the two legs 2 and 2 at different heights by screws 20 and 20. is there.
Other configurations are the same as those of the first invention, and thus the same configurations are denoted by the same reference numerals and description thereof will be omitted.

[0022]

According to the learning desk with a replaceable top plate of the present invention as described above, even when an upper shelf is provided at the rear portion of the top plate, a user with a small physical size can use his / her hand while sitting on a chair. So that the effective depth of the top plate can be reduced by changing the mounting position of the main top plate, i.e., by lowering the main top plate and replacing the front end of the main top plate with the rearwardly retracted position, and When the main top is set to a low state, the fixed top can be used as a middle shelf. That is, the main tabletop can be easily set from the low state to the high state according to the growth of the child, and the mode can be easily changed between the low state and the high state according to the physique of the user.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a learning desk according to a first invention.

FIG. 2 is a sectional view showing the same high state.

FIG. 3 is a cross-sectional view of a main part showing the same low state.

FIG. 4 is a sectional view showing a high state of the learning desk according to the second invention.

FIG. 5 is a cross-sectional view of a main part showing the same low state.

FIG. 6 is a sectional view showing a high state of the learning desk according to the third invention.

FIG. 7 is a cross-sectional view of a main part showing the same low state.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Learning table 2 Leg 3 Fixed top plate 4 Main top plate 5 Support member 6 Inclined edge 7 Inclined edge 8 Lower shelf 9 Support rod (support member) 10 Mounting cylinder 11 Screw 12 Bracket (support member) 13 Engagement hole 14 Downward hook 15 Front surface 16 Forward hook 17 Upper surface 18 Engagement hole 19 Support rod (support member) 20 Screw

Claims (4)

[Claims] 1. A top plate fixed to the rear portions of both legs is separated into a fixed top plate and a main top plate having a depth greater than the fixed top plate,
A pair of support members are attached to the rear portion of the main top plate by projecting rearward from both rear portions thereof, and the support members are detachably attached to different positions of the legs so that the main top plate can be moved forward of the fixed top plate. It can be set to a continuous high state in which the upper surfaces are flush with each other, and a low state in which the rear edge of the main top plate is located at a position retracted below the lower surface of the fixed top plate. A study desk with a replaceable top plate. 2. A support rod as the support member is fixed to the lower surface on both sides of the main top plate, and the support rod is moved forward at a position of the two legs closer to the lower surface of the fixed top plate and further below and at a rearward position. 2. The replaceable ceiling according to claim 1, wherein a mounting cylinder body which is removably engaged with the mounting cylinder is mounted, and the support rod is engaged with one of the upper and lower mounting cylinder bodies, and the support rod is fixed so as not to come off. Learning desk with board. 3. A bracket as the support member is mounted on the lower surface on both sides of the main top plate so that the front and rear positions can be interchanged, and two pairs of engagement holes are formed on the upper and lower front surfaces of the both legs, and the rear end of the bracket is formed. The exchangeable learning board with a top plate according to claim 1, wherein the hooks are fitted into and engaged with the pair of engagement holes from above and below. 4. A support bar as the support member is fixed to the lower surface on both sides of the main top plate, and the support bar is detachably screwed to the inner surfaces of the two legs at different heights. A study desk with a replaceable top plate.