JP5148193B2 - Desk with shelf - Google Patents

Description

  The present invention relates to a desk with an upper shelf in which an upper shelf is provided at the rear part of a desk main body having a top plate whose height can be adjusted so that the vertical position can be changed.

Some desks for learning, etc., can change the vertical position of the top shelf and the upper shelf provided at the rear part according to the growth and physique of the user so that the usability can be improved ( For example, see Patent Document 1).
JP-A-2005-349

  In the desk described in Patent Document 1, the left and right side legs of the desk body are composed of a pair of front and rear columns, and a shelf in an upper shelf (shelf) is provided between the opposing surfaces of the pair of front and rear columns. Since the legs that face the front and rear of the pair of left and right support legs (side frames) that support both ends of the board are fitted and supported so that the vertical position can be changed, When installing, if the upper shelf is lifted above the side legs and the support legs are not vertical, the left and right legs can be fitted smoothly between the left and right side leg posts on the desk body from above. I can't.

Therefore, the work is performed while holding the heavy upper shelf with the hand above the side legs so that the support legs are vertical, so that the workability is poor and the burden on the worker is large.
Moreover, when the leg part of the upper shelf is fitted between the front and rear columns, it is necessary to pull it up vertically when changing the height of the upper shelf, which is troublesome.
Furthermore, since the top plate and the upper shelf are fixed separately at different positions on the side legs of the desk body so that the vertical position can be changed, the number of mounting steps and the number of steps for height adjustment are increased.

  The present invention has been made in view of the above problems, and can be easily attached to the desk body so that the upper and lower positions can be changed, and the upper shelf can be easily fixed to the desk body. The purpose is to provide a desk.

According to the present invention, the above problem is solved as follows.
(1) A pair of left and right side plates and a pair of side plates are installed on the rear of the desk main body having left and right side legs and a top plate that can be adjusted in height between the opposing surfaces. In a desk with an upper shelf that is mounted so that the vertical position can be changed, the left and right side plates of the upper shelf are arranged so as to be in contact with or close to the inner surfaces of both side legs of the desk body. The lower end of both side plates protrudes from the inner surface of the rear part of the left and right side legs, and is supported by a support member whose mounting position can be changed up and down, and the lower surfaces of both side parts of the top plate are supported in front of the both side legs. It is supported by a support member that protrudes from the inner side surface of the part and can change the mounting position up and down.

(2) In the above item (1), the lower surfaces of the both sides of the rear end portion of the top plate are supported by a support member that protrudes from the inner side surface of the left and right side plates in the upper shelf, and the mounting position can be changed up and down.

(3) In the above item (1) or (2), inward recessed step portions are provided on both side surfaces of the rear end portion of the top plate, and the side plates of the upper shelf are fitted into the recessed step portions. .

(4) In any one of the above items (1) to (3), a second recessed stepped portion that contacts the front ends of the left and right side legs is provided on both side surfaces of the front end portion of the top plate.

(5) In any one of the above items (1) to (4), a plurality of upper and lower screw insertion holes facing left and right are provided on both side legs of the desk body and both side plates of the upper shelf. The screws inserted from the outside in any one are provided on both sides of the top plate and screwed into the screw holes to fix the side legs, the side plates and the top plate to each other.

(6) In any one of the above items (1) to (5), by attaching a rear plate to the rear ends of both side plates, the upper shelf is formed in a U-shape facing forward in plan view. It arrange | positions so that it may contact | abut or adjoin to the inner surface of a both-sides leg and the curtain plate attached to the rear end.

(7) In any one of the above items (1) to (6), by attaching the shelf plate above the central portion in the vertical direction of the side surface plates, the upper shelf is positioned above the top plate. Select the first mounting form to be mounted on the desk main body and the second mounting form to be mounted on the desk main body so that the shelf is positioned below the top plate by turning the upper shelf upside down. Make it possible.

According to the invention described in the above item (1) , the left and right side plates of the upper shelf are arranged between the side legs of the desk body, and the lower end of both side plates is changed to the mounting position of the inner side surface of the side legs up and down. After supporting by a possible support member, the desk main body is simply supported by a support member that can change the mounting position up and down by projecting the lower surface of both sides of the top plate to the inner side surface of the front part of the side leg In addition, the upper shelf can be easily mounted so that the vertical position can be changed.
Further, since the upper shelf can be attached even from the front of the desk main body, it is not necessary to lift and attach the upper shelf above the desk main body as in the prior art, thereby reducing the labor burden on the operator.

According to the invention described in the above item (2), the lower surfaces of both sides of the rear end of the top plate are supported by the left and right side plates of the upper shelf, and the load on the top plate is applied to the upper shelf. Is prevented from moving to.
Moreover, the lower surfaces of both side portions of the top plate are stably supported by the upper shelf and the desk body.

According to the invention described in item (3) above , the inward recessed step portions are provided on both side surfaces of the rear end portion of the top plate, and the side plates of the upper shelf are fitted into the recessed step portions. Therefore, it is not necessary to reduce the horizontal dimension of the entire top plate, and the upper surface can be widely used.
Moreover, the rear-end part of a top plate can be supported in the state positioned in the front-back direction on the both-sides board of an upper shelf.

According to the invention described in (4) above , the top plate is positioned in the front-rear direction with respect to the desk body by the second recessed stepped portion, so the top board and the upper shelf are placed in the front-rear direction on the desk body. Can be positioned and mounted accurately.

According to the invention described in the above item (5) , since the top plate and the upper shelf can be fixed to the desk main body with only one screw on each of the left and right sides, the assembling work becomes efficient.
In addition, since the top plate and the upper shelf can be positioned in the front-rear direction with respect to the desk body by the second recessed stepped portion, the screw insertion hole and the female screw hole can be easily aligned and easily screwed. it can.

According to the invention described in (6) above, by attaching the rear plate to the rear ends of the both side plates, the upper shelf is formed in a U-shape facing forward in plan view. The upper shelf can be stably attached to the rear part of the desk body by placing it in contact with or close to the inner surface of the curtain plate attached to the rear end, and the article on the top plate or shelf can be Is prevented from falling.

According to the invention described in the above item (7) , the upper shelf can be used in two usage forms, so that the usability is improved.
Further, when the upper shelf is turned upside down and the shelf board is positioned below the top board, the upper surface of the top board can be used widely, and an article storage section is secured below the top board. Therefore, it is not necessary to remove the upper shelf and install it in another place or dispose of it.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 is a perspective view showing an embodiment of the present invention, FIG. 2 is an exploded perspective view, FIG. 3 is a front view, FIG. 4 is a plan view, and FIG. 5 is a side view.

The desk with an upper shelf of the present invention includes a desk body 1 and an upper shelf 2 attached to the rear part thereof so that the vertical position can be changed.
The desk main body 1 has a pair of left and right side legs 3 and 3, a curtain plate 4 whose both ends are fixed to the opposing surfaces of the rear end portions of the both side legs 3, and the opposing surfaces of the lower end portions on the rear side of the both side legs 3. It consists of a bottom plate 5 that is fixed across the table, and a top plate 6 that is provided in a U-shaped space between the side legs 3 and the curtain plate 4 so that the height can be adjusted.

  The left and right side legs 3 have a side-view inverted L-shape in which a base leg 7 facing in the front-rear direction and a vertical frame 8a whose lower end is fixed to the front upper surface thereof are connected to a horizontal frame 8b facing back. A leg frame 8 that forms the same, a side plate 9 having a small front-rear dimension fixed between opposed surfaces of the front end of the horizontal frame 8b and the base frame 7, and between the opposed surfaces of the rear portions of the horizontal frame 8b and the base legs 7, It is composed of a side plate 10 having a large front-rear dimension, which is fixed so as to form a gap between the front side plate 9 and the inner side surfaces of the leg frame 8 and the front and rear side plates 9, 10 have no step. Are aligned on the same plane.

  Screw insertion holes 12, 12 that face the left and right directions for inserting screws 11 for attaching the top plate 6 are respectively formed in the upper portion of the front side plates 9 and the central portion of the upper portion of the rear side plates 10. A plurality of holes are formed at regular intervals in the vertical direction so as to be level with each other.

A plurality of upper and lower bottom mounting holes 13 are formed in the upper inner surface of the side plates 9 so as to be positioned between the screw insertion holes 12 adjacent to each other in the upper and lower sides. The support member 14 which supports the lower surfaces of both side portions of the front end portion of the top plate 6 is detachably attached.
A plurality of mounting holes 15, 15 are also formed at regular intervals in the vertical direction on the inner side surfaces of the front and rear end portions of the rear side plates 10 so as to be equal to each other. A support member 14 for supporting lower ends of left and right side plates 23 to be described later in the upper shelf 2 is detachably attached to the attachment hole 15.

  The left and right dimensions of the front end portion of the top plate 6 are slightly smaller than the distance between the outer surfaces of the left and right side legs 3 and 3, and the left and right side surfaces of the center portion and the rear end portion are respectively 3, and a recessed step portion 16 having a left and right dimension substantially equal to the dimension between the three opposing surfaces, and a recessed step portion 17 having a left and right dimension substantially equal to the dimension between the facing surfaces of the side plate 23 described later in the upper shelf 2 are continuous. Is formed.

  The front-facing outwardly engaging stepped portion 18 of the front recessed portion 16 abuts the front surface of the vertical frame 8a of the left and right leg frames 8 and faces the front end of the rear recessed stepped portion 17 outward. The locking step portion 19 comes into contact with the front end of a side plate 23 described later in the upper shelf 2.

Screws inserted into the screw insertion holes 12 of the front and rear side plates 9 and 10 at the front end portion of the left and right recessed step portions 16 at the central portion and the intermediate portion of the left and right recessed step portions 17 at the rear end portion. Female screw holes 20 and 20 are formed in which the tip end portions of 11 are screwed.
At the left and right corners of the rear end of the top plate 6 and the bottom plate 5, notches 21 and 21 for wiring insertion are formed, respectively.
A lockable drawer 22 is attached to the lower part on the right side of the top plate 6.

  As shown in the enlarged exploded perspective view of FIG. 6, the upper shelf 2 includes a pair of left and right side plates 23, 23, a rear plate 24 having both side ends fixed to opposite surfaces of the rear end portions of the side plate 23, And a horizontal connecting plate 25 that connects the rear end portions of the opposing surfaces of the upper end portions of the side plate 23.

The front-rear dimension of the left and right side plates 23 is slightly smaller than the front-rear dimension of the side plate 10 of the side leg 3 in the desk main body 1, and the dimension between the outer surfaces is also much smaller than the dimension between the opposing surfaces of the side plates 10. The entire upper shelf 2 can be fitted between the side legs 3 while the outer side surfaces of the side plates 23 are made to be slightly small and are in sliding contact with the inner sides of the left and right side plates 10.
Further, the dimension between the opposing surfaces of the side plates 23 is substantially equal to the left and right dimension between the left and right recessed step portions 17 at the rear end of the top plate 6, and the rear end of the top plate 6 is located on the both side plates 23. It is fitted between them.

A plurality of upper and lower screw insertion holes 26 are formed in the lower central portion of the left and right side plates 23 so as to correspond to the screw insertion holes 12 of the left and right side plates 10 in the desk body 1.
In addition, a plurality of upper and lower mounting holes 27 opening inward are formed on the inner side surfaces of the side surface plates 23 so as to form an equal pitch with the mounting holes 13 of the front side plate 9 in the desk body 1. 27, a support member 14 for supporting the lower surfaces of both side portions of the rear end portion of the top plate 6 is detachably attached.

A plurality of partition plates 28 are attached to the rear plate 24 and the horizontal connecting plate 25 as follows.
As shown in the enlarged vertical sectional view of FIG. 7, a slit 29 that is substantially equal to the plate thickness and the front-rear dimension, which can be inserted into the horizontal connecting plate 25 from the front, is provided at the rear end portion near the lower side of the partition plate 28. It is formed toward the front.
On the other hand, a plurality of positioning grooves 30 having a concave shape with a width substantially equal to the plate thickness of the partition plate 28 are formed at the front end portion of the horizontal connecting plate 25.

  After fitting the slit 29 of the partition plate 28 into the positioning groove 30 of the horizontal connecting plate 25 from the front until the rear end thereof contacts the front surface of the rear plate 24, the upper and lower two holes formed in the rear plate 24 are provided. By screwing screws 32, 32 inserted from the rear into the through holes 31, 31 into two upper and lower female screw holes 33, 33 provided on the rear surface of the partition plate 28, the partition plate 28 is connected to the rear plate 24. The horizontal connection plate 25 is attached so that the left and right positions can be changed according to the number of positioning grooves 30.

On the upper surface of the horizontal connecting plate 25, a shelf plate 34 having a large left-right dimension and two shelf plates 35, 35 having a smaller left-right dimension are attached as follows.
As shown in FIG. 6, two front and rear mounting holes 36, 36 formed at the center between the inner side surfaces of the left and right side plates 23 and the both side surfaces of each partition plate 28 slightly above the horizontal connecting plate 25. A support rod 37 made of a wire facing in the front-rear direction is attached in an opposing manner so as to slightly protrude from each surface. Two front and rear mounting holes 36 are provided slightly below the lateral connecting plate 25 on the inner side surface of the side plate 23 and on both side surfaces of each partition plate 28, and the support rods 37 are provided in these mounting holes. It can be attached selectively.

  On both side surfaces of the shelves 34 and 35, there are formed mounting grooves 38 that face in the front-rear direction and open to the outside and the rear, and these mounting grooves 38 are inserted into the support rods 37 facing each other from the front. As a result, the shelf plates 34 and 35 are detachably supported by the opposing surfaces of the side plate 23 and the partition plate 28 so that the lower surface of the rear end portion is in contact with the upper surface of the lateral coupling plate 25.

  As shown in FIG. 8, a female screw hole 39 opening downward is formed at the center of the lower surface of the rear end of each shelf plate 34, 35 (only the shelf plate 34 is shown for the same structure). The shelf plates 34 and 35 can be detached from the support rods 37 forward by screwing the hole 39 into the hole 39 from below through the through hole 40 of the lateral connecting plate 25, which can be turned by hand. Is prevented.

  Side plates 42, 42 are attached to the lower surfaces of both side portions of the shelf plates 35, 35, and a drawer 43 is formed between the side plates 42, and guide grooves 44 formed on both side surfaces thereof facing the front-rear direction are provided on the side plates 42. By being slidably fitted to a support piece (not shown) that protrudes on the inner surface and faces in the front-rear direction, it is housed so as to be able to be pulled out forward.

On the upper surface of each shelf plate 34, 35, a partition plate 45 that is slightly shorter than the front-rear dimension is attached as follows so that the left-right position can be adjusted.
As shown in FIG. 8, a synthetic resin mounting member having an L-shaped cross section facing forward in a side view is provided at a corner portion of a lower end of each partition plate 45 (which has the same structure and only the shelf 34 side is illustrated). 46 is attached by bringing the forward piece 46a into contact with the lower surface of the partition plate 45 and fixing the vertical piece 46b to the rear end surface of the partition plate 45 with two upper and lower screws 47.

  A short guide piece 46c is provided at the lower end of the vertical piece 46b so as to be spaced forward from the front piece 46a. The guide piece 46c is formed in the left-right direction formed at the rear end of the shelf board 34. The left and right positions of the partition plates 45 of the shelf plates 34 and 35 can be arbitrarily adjusted by slidably fitting into the guide grooves 48 facing the. When the shelf plates 34 and 35 are attached to the horizontal connecting plate 25, the rear surface of the vertical piece 46b of the attachment member 46 is close to the front surface of the rear surface plate 24, so that the partition plate 45 is detached from the shelf plates 34 and 35. There is no.

  To attach the thus configured upper shelf 2 to the desk main body 1, as shown in FIG. 2, before attaching the top plate 6, the side plates 23 of the upper shelf 2 are attached to the left and right side legs 3 of the desk main body 1. 3 is inserted from above so that the outer surface of the side plate 23 contacts or approaches the inner surface of the side plate 10 and the rear surface of the rear plate 24 contacts or approaches the front surface of the curtain plate 4. The lower ends of the side plates 23 are supported by the two front and rear support members 14 attached to arbitrary attachment holes 15 on the inner side surface of the rear side plate 10. Since the inner surfaces of the side legs 3 are the same surface, both side plates 23 of the upper shelf 2 can be inserted between the side legs 3 even from the front of the desk body 1.

  Next, from the front of the desk body 1, the front and rear locking step portions 18 and 19 formed on the both sides of the top plate 6 abut against the front end surface of the side leg 3 and the front end of the side plate 23 of the upper shelf 2, respectively. And the lower surfaces of both front and rear ends of the top plate 6 are attached to the inner side surface of the side plate 9 on the front side of the both side legs 3 and the inner side surface of the side plate 23 of the upper shelf 2 so as to be flush with each other. The support member 14 is supported. In this state, the rear end surface of the top plate 6 is set close to or in contact with the front surface of the rear plate 24 of the upper shelf 2.

  Next, the screw 11 is inserted from the outside into any one of the screw insertion holes 12 and 26 that are formed in the front and rear side plates 9 and 10 and the side plates 23 of the upper shelf 2 and that are aligned with each other. And the front-end | tip part is screwed in the screw holes 20 and 20 in order to provide in the recessed step parts 16 and 17 of the both sides | surfaces of the center part and rear end part in the top plate 6. The screwing operation at this time can be easily performed because the top plate 6 is positioned in the front-rear direction by the front and rear locking steps 18 and 19.

Thereby, the both side legs 3 of the desk main body 1, the both side plates 23 of the upper shelf 2, and the top plate 6 are fixed to each other by the screws 11. As shown in FIG. 2, a plurality of upper and lower screw insertion holes 49 are also provided in the central portion of the curtain plate 4 and the rear plate 24, and screws (not shown) inserted from the rear are attached to the rear surface of the top plate 6. Since it is provided in the central portion, it may be screwed into a screw hole (not shown). In this way, the both side legs 3, the side surface plates 23, and the top plate 6 can be more firmly fixed.
When changing the vertical position of the top plate 6 and the upper shelf 2, the vertical mounting position of the support member 14 may be changed.

  FIG. 9 shows a second mounting form in which the upper shelf 2 is turned upside down and the vertical position is adjusted so as to be substantially the same height as the upper end of the desk body 1. Without removing the top plate 6, the upper surface of the top plate 6 can be widely used, and the shelf plates 34 and 35 and the drawer 43 can be used below the top plate 6.

  Thus, when using the upper shelf 2 upside down, in the mounting form shown in FIGS. 1 to 8, the horizontal connecting plate 25 to which the shelf plates 34 and 35 are attached is connected to the central portion of the upper shelf 2 in the vertical direction. When the upper shelf 2 is turned upside down, the horizontal connecting plate 25 may be positioned below the top plate 6.

Since the shelf plates 34 and 35 are detachably attached to the horizontal connecting plate 25, as shown in FIG. 10, they are removed and turned upside down, and again attached to the horizontal connecting plate 25 in the same manner as described above. The same shelf boards 34 and 35 and the drawer 43 of the shelf board 35 can be used as they are. At this time, the support rods 37 are also removed at the same time, and may be replaced with the mounting holes 36 provided in advance when the upper shelf 2 is inverted.
In addition, when the upper shelf 2 is inverted and attached, the partition plate 28 protrudes greatly downward. However, the partition plate 28 may be removed and turned upside down and replaced so as to protrude largely upward.
Further, the left shelf plate 34 to which the drawer 43 is not attached does not need to be removed and turned upside down if the upper and lower surfaces can be used as the article placement surface.

  In the above embodiment, the shelf plates 34 and 35 are attached to the horizontal connecting plate 25, but they may be directly attached to the partition plate 28 fixed to the front surface of the side plate 23 or the rear plate 24 so as to be removable. .

  Moreover, in the said embodiment, although the locking step parts 18 and 19 which contact | abut to the front leg of the side leg 3 and the side plate 23 are provided in the front-and-rear part of the both sides | surfaces of the top plate 6, respectively, Sometimes omitted.

  Furthermore, in the said embodiment, although the side plate 23 of the upper shelf 2 is being fixed to the side leg 3 of the desk main body 1, the rear end part of the top plate 6 is supported by the support member 14 attached to the inner surface of the side plate 23. Since the upper shelf 2 is prevented from moving upward, only the top plate 6 may be fixed to the side legs 3.

The support member 14 that supports the lower end of the side plate 23 in the upper shelf 2 may be long in the front-rear direction.
The rear plate 24 of the upper shelf 2 may be omitted, and only the left and right side plates 23 and the shelf plates installed on the opposing surfaces thereof may be used.

It is a perspective view of one embodiment of a desk with an upper shelf of the present invention. Similarly, it is an exploded perspective view. Similarly, it is a front view. Similarly, it is a plan view. Similarly, it is a side view. It is a disassembled perspective view of an upper shelf. It is the VII-VII line enlarged vertical side view of FIG. Similarly, it is an VIII-VIII line enlarged vertical side view. It is a perspective view which shows the attachment form which turned the upper shelf upside down and attached. Similarly, it is an exploded perspective view when the upper shelf is turned upside down.

DESCRIPTION OF SYMBOLS 1 Desk body 2 Top shelf 3 Side leg 4 Curtain plate 5 Bottom plate 6 Top plate 7 Base leg 8 Leg frame 8a Vertical frame 8b Horizontal frame 9 Side plate 10 Side plate 11 Screw 12 Screw insertion hole 13 Mounting hole 14 Support member 15 Mounting hole 16 Concave Stepped portion 17 Recessed stepped portion 18 Locking stepped portion 19 Locking stepped portion 20 Female screw hole 21 Notch 22 Drawer 23 Side plate 24 Rear plate 25 Lateral connecting plate 26 Screw insertion hole 27 Mounting hole 28 Partition plate 29 Slit 30 Positioning groove 31 Through hole 32 Screw 33 Female screw hole 34 Shelf plate 35 Shelf plate 36 Mounting hole 37 Support rod 38 Mounting groove 39 Female screw hole 40 Through hole 41 Set screw 42 Side plate 43 Drawer 44 Guide groove 45 Partition plate 46 Mounting member 46a Forward piece 46b Vertical piece 46c Guide piece 47 Screw 48 Guide groove 49 Screw hole

Claims (6)

A shelf erected between the opposed surfaces of a pair of left and right side plates and both side plates at the rear of the desk body having left and right side legs and a top plate that can be adjusted in height between the opposed surfaces. In a desk with an upper shelf that is mounted so that the upper and lower positions can be changed,
The mounting position in which the left and right side plates of the upper shelf are arranged so as to contact or be close to the inner surfaces of the both side legs of the desk main body, and the lower ends of the both side plates protrude from the inner side surfaces of the rear portions of the left and right side legs. Is supported by a support member that can be changed up and down, and is supported by a support member that can change the mounting position up and down . Furthermore, a desk with an upper shelf characterized in that the lower surfaces of both sides of the rear end portion of the top plate are supported by a support member that protrudes from the inner surfaces of the left and right side plates of the upper shelf and whose mounting position can be changed up and down. . A shelf erected between the opposed surfaces of a pair of left and right side plates and both side plates at the rear of the desk body having left and right side legs and a top plate that can be adjusted in height between the opposed surfaces. In a desk with an upper shelf that is mounted so that the upper and lower positions can be changed,
The mounting position in which the left and right side plates of the upper shelf are arranged so as to contact or be close to the inner surfaces of the both side legs of the desk main body, and the lower ends of the both side plates protrude from the inner side surfaces of the rear portions of the left and right side legs. Is supported by a support member that can be changed up and down, and is supported by a support member that can change the mounting position up and down . Furthermore, the desk with an upper shelf provided with the recessed step part which contact | abuts to the front end of a right-and-left side leg in the both sides | surfaces of the front-end part of the said top plate.   The desk with an upper shelf according to claim 1 or 2, wherein an inward recessed step portion is provided on both side surfaces of the rear end portion of the top plate, and a side plate of the upper shelf is fitted into the recessed step portion. A plurality of upper and lower screw insertion holes facing the left and right sides are provided on both side legs of the desk body and both side plates of the upper shelf, and the screw inserted from the outside into one of these screw insertion holes is placed on both sides of the top plate. by screwing the female screw hole provided in the surface, upper shelf with a desk according to any one of claims 1 to 3 which is formed by fixing the side leg and the side plate and the top plate together. By attaching the rear plate to the rear ends of both side plates, the upper shelf is formed in a U-shape facing forward in plan view, and this upper shelf is in contact with the inner surfaces of the both side legs of the desk body and the curtain plate attached to the rear end. Or the desk with an upper shelf in any one of Claims 1-4 arrange | positioned so that it may adjoin. A first mounting form in which the shelf is attached to the desk body so that the shelf is positioned above the top plate by attaching the shelf above the central portion in the vertical direction of the side plates, and the upper shelf The desk with an upper shelf according to any one of claims 1 to 5 , wherein the desk can be selectively attached to the second mounting form in which the shelf is attached to the desk body so that the shelf is positioned below the top board by being inverted. .

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