JP2624084B2 - Tray desk mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting device for mounting a tray, for example, by using a support rod which is supported by a top plate and extends in a lateral direction at a joint portion of a desk facing each other.

[0002]

2. Description of the Related Art Conventionally, for example, when a device such as a tray is attached to a top plate at a joint portion of a desk facing each other, right and left ends of a support rod extending in the width direction of the top plate are bent downward and fitted. The lower end of this fitting part is fitted and locked in the mounting holes provided on the left and right positions of the top plate, and two support rods are installed in parallel at the joint positions of the top plate facing each other. A configuration in which a device such as a tray is supported between the two support rods is disclosed in, for example, Japanese Utility Model Laid-Open Publication No.
It is publicly known, for example, from JP-A-152532.

[0003]

According to the above-mentioned conventional supporting device, a device such as a tray is hung between two parallel supporting rods at the joint of the tabletops of the desks facing each other. Because of the support structure, when there is a step on the tabletop of the desks facing each other, a step also occurs in the height of the two parallel support rods, and the stability of the mounting state of the instrument is lost, and the face-to-face When the parallelism between the two support rods cannot be obtained due to the formation of a gap between the top plates, there has been an inconvenience such as difficulty in mounting the two support rods.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned inconveniences, the present application solves the above-mentioned inconvenience by attaching a mounting member that is mountable to a support rod that is mounted on a tabletop of a desk, A tray mounting bracket for detachably locking the tray, wherein the mounting member sandwiches the position of the intervening portion with a mounting body having an interfacing portion allowing the fitting of the support rod from below. A vertically rotatable rotating member having a fixed holding portion for holding a part of the outer periphery of the support rod and a movable holding piece for holding another part of the outer periphery of the support rod so as to face each other in the front-rear direction; And an urging spring that constantly urges the rotating member in a direction away from the fixed holding portion, and an external that is screwed to the mounting body and presses the rotating member in the direction of the fixed holding piece. Operable screw means, and the tray mounting bracket is It has a vertical portion and a horizontal portion, and a locking claw that locks with an engagement hole provided on the outer surface of the corner portion of the tray is provided at a right angle position thereof, So that the workers can use the trays with each other,
Attach the tray mounting brackets. Also, a mounting member detachably attached to a support rod attached to the desk top plate so that trays can be installed in multiple stages on the desk top plate, and a tray attached to and detached from the top surface of this mounting member. It has a tray mounting bracket that freely locks and an upper and lower rod, the lower rod of which is fixed to the upper surface of the bottom of the tray mounting bracket, and the upper rod that is fixed to the lower surface of the bottom of the tray mounting metal to mount the tray in the vertical position. The mounting member is constituted by a pair of left and right side connecting rods for connecting the metal fittings, and the mounting member sandwiches the position of the intervening portion with a mounting body having an interfacing portion allowing the fitting of the supporting rod from below. A vertically rotatable rotating member having a fixed holding portion for holding a part of the outer periphery of the support rod and a movable holding piece for holding another part of the outer periphery of the support rod so as to face each other in the front-rear direction; Along with
An urging spring for constantly urging the rotating member in a direction away from the fixed holding portion, and externally operable screw means screwed to the mounting body and pressing the rotating member in the direction of the fixed holding piece. The tray mounting bracket has a vertical portion and a horizontal portion, and a locking claw that locks with an engagement hole provided on an outer surface of a corner portion of the tray is provided at a right angle portion thereof. Specifically, the mounting member has a rectangular cross section and a left and right position of a cylindrical outer casing having an entrance on the lower surface, and the lower surface is opened at the position of the entrance to fit the support rod. The outer surfaces of the left and right side plates are attached to one end of a hollow mounting body formed by mounting left and right side plates each having an allowable fitting portion, and one end of a flange having a shape substantially matching the outer periphery thereof except for the front surface of the support rod. A pair of left and right fixed holding pieces forming a fixed holding portion inside the mounting body, with the flange facing the inside of the mounting body from the fitting portion, and an inside of the mounting body. And has a shape that fits the front portion of the support rod, and is interposed between the pair of left and right fixed holding pieces to hold the support rod in opposition to the holding portion. A rotating member having a movable holding piece, and an upper end mounted via a pivot in the mounting body; A biasing spring for constantly biasing the moving holding piece in a direction away from the fixed holding portion; and And a plurality of mounting holes are provided on the upper surface of the mounting body, and the tray mounting bracket is, specifically, a metal fitting body mounted on the upper surface of the mounting member, A supporting metal member for detachably supporting the tray, wherein the metal member main body vertically erects a rear portion of a long metal plate forward and backward to integrally form a bottom plate and a back plate, and a front edge portion of the bottom plate. And the left and right side edges are bent upwards, and the upper edges of the left and right side edges are further bent inward to form a receiving plate. And the front edge of the upper edge portion is further bent downward to form a mounting plate. A mounting hole disposed in location, and,
At the center portion of the bottom plate, a mounting hole is formed that matches the mounting hole of the mounting member, and the support bracket is formed of a metal plate bent in an L-shape at the left and right side edges of the connecting plate. The stop pieces are integrally opposed to each other, and a locking claw is formed on each of the upper end front edge of the vertical piece and the upper front edge of the horizontal piece of the lock piece,
The support fitting is attached to an inner surface of a bent portion formed of a bottom plate and a back plate of the fitting main body, and the locking claws protrude from upper surfaces of a mounting plate and a receiving plate, respectively. Also, in order to be able to attach the side connecting rod, the left and right upper bent parts of the bottom plate of the bracket body,
It is formed by providing an insertion hole for inserting the lower rod of the pair of left and right side connecting rods into the upper surface of the bottom plate of the bracket main body, more preferably,
The support rod is formed in a flat elliptical shape.

[0005]

When the tray member is to be mounted on the support rod of the support member, first, the screw means is retracted, and the movable holding piece is separated from the fixed holding portion by the urging force of the urging spring. Then, the support rod intervenes into the mounting body from the entrance through the lower surface of the mounting body and fits into the fixed holding piece. In this state, when the screw means is rotated to press the lower back surface of the rotating member, the rotating member is vertically rotated against the urging force of the urging spring, and the fixed holding portion and the movable holding piece are rotated. Thus, the supporting rod is held in the front-rear direction, and thus the mounting member provided with the tray mounting bracket is mounted on the supporting rod in a horizontal state. Then, a tray member is removably attached to the tray mounting bracket. That is, the outer surface of the corner portion of the tray is fitted at a right angle position between the vertical portion and the horizontal portion of the tray mounting bracket,
Attachment is achieved by engaging an engaging claw provided at that position with an engaging hole provided on the outer surface of the corner of the tray.
Also, when arranging a plurality of trays in the height direction, with the lowermost tray mounting bracket attached to the mounting member, attach the distal ends of the lower rods on the left and right side connecting bars to the bracket body of the tray mounting bracket. Attachment, and then, the distal ends of the upper rods of the left and right connecting rods are attached to the bottom plate of the metal fitting body of the middle tray mounting fitting. In this way, a plurality of tray mounting brackets are vertically arranged via the connecting rod, and the plurality of tray mounting brackets are integrally mounted on the upper surface of the mounting member. Are detachably mounted.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a top plate A, A, and two desks installed facing each other and a support plate attached to one desk top plate A. The member 1 is an exploded perspective view in which the tray is used alone or two trays are attached back to back using the attachment device of the present application, and a partly omitted exploded perspective view is shown. A pair of left and right support arms 3, 3 in which the base shaft 2 is fitted and locked respectively in mounting holes a, a provided in the rear left and right positions of the plate A, and horizontally mounted on the distal ends of the support arms 3, 3 for mounting. And a supporting rod 4 made of a metal pipe having a flat elliptical vertical cross section.

As shown in FIG. 2, the mounting device of the present invention, which is mounted on the support rod 4 of the support member 1, is a tray for removably engaging the tray B on the upper surface of a mounting member 5 which is removable from the support rod 4. As shown in FIG. 3, the mounting member 5 is attached to the left and right positions of a cylindrical outer housing 8 having a square cross section and having an entrance 7 on the lower surface. A hollow mounting body formed by mounting left and right side plates 10a, 10b each having a fitting portion 9 having an opening at the lower surface at the position of the entrance portion 7 and allowing the fitting of the support rod 4 so as to be slightly depressed from the side edge. At one end of a flange 12 having a shape substantially matching the outer periphery of the support rod 4 except for the front surface of the support rod 4, a mounting piece 14 fastened to the outer surfaces of the left and right side plates 10a and 10b by a set screw 13 is provided. , The flange 12 is located inside the mounting body 11 from the fitting portion 9. Face by forming the fixing holding section 15 in the interior of the mounting body 11 a pair of left and right fixed retaining pieces 16a, 16
and a movable holding member for holding the supporting rod 4 between the pair of left and right fixed holding pieces 16a and 16b in the outer casing 8 with a shape for fitting the front portion of the supporting rod 4 to the outer casing 8. A pivoting member 19 having a piece 17 and having an upper end mounted on the mounting body 11 via a pivot 18;
7 is a rotating member that moves away from the fixed holding portion 15 at all times.
A biasing spring 20 for biasing the rotating member 9 and a nut 21 provided at the center of the front surface of the mounting body 11 are screwed into the rotating member 19 against the biasing spring 20 by rotating the knob 22. And a screw member 23 for pressing the lower portion on the back side. A plurality of mounting holes 24 are provided on the upper surface of the mounting body 11, and nuts 25 are mounted at the positions of the mounting holes 24, respectively.

[0008] As shown in FIG. 2, the tray mounting bracket 6 has a bracket main body 26 mounted on the upper surface of the mounting member 5.
And a support fitting 27 for detachably supporting the tray B. The metal fitting body 26 has a bottom plate 28a and a back plate 28b formed in a right angle by vertically erecting a rear portion of a long metal plate in front and back, and a front edge and a left and right side edge of the bottom plate 28a are directed upward. While bending, the upper edges of the left and right side edges are further bent inward to form receiving plates 29, 29, and the upper edge and the left and right side edges of the back plate 28b are bent forward respectively. , The front edge of the upper edge portion is further bent downward to attach the mounting plate 3.
0 is formed, and receiving pieces 31, 31 made of rubber pieces are provided at front and rear positions of the left and right receiving plates 29, # 29, respectively, for preventing rattling.

Further, mounting holes 32 are provided at right and left positions of the mounting plate 30, and the bottom plate 28a
In the front-rear position at the center in the left-right direction, two sets of mounting holes 33 that match the mounting holes 24 in the front-rear direction of the mounting member 5.
a1, 33a2 and 33b1, 33b2 are opened,
The distance between the rearmost mounting hole 33b2 and the rear edge of the bottom plate 28a is 1/1 / the distance between the mounting holes 24 in the front-rear direction of the mounting member 5.
2, mounting holes 34, 34 are provided near the rear portions of the left and right upper bent portions 28c, 28c provided on the bottom plate 28a, respectively, and the left and right upper bent portions 28c, 28c are provided.
Insertion holes 35, 35 extending in the front-rear direction along the lower edge near the front of 28 c are provided, respectively.
Mounting holes 3 at the left and right central portions of the bottom plate 28a facing
6,36 are open.

As shown in FIG. 3, the support fitting 27 is formed by integrally providing left and right locking portions 37, 37 bent in an L-shape on the left and right side edges of a vertical connecting plate 39. Piece 3
Locking claws 40a, 40b and 41a, 41 are respectively provided on the front edge of the upper end of the vertical piece 38a and the upper edge of the front end of the horizontal piece 38b.
b are formed respectively, and the support fittings # 27 thus configured are attached to the mounting holes 42, 42 provided at the left and right positions of the connecting plate 39 and to the left and right positions of the mounting plate 30 of the fitting body 26. The attachment holes 32, 32 provided are fastened by screws 43, and the horizontal pieces 3 of the left and right locking pieces 37a, 37b are formed.
8b and the fitting body 2
6, upper bent portions 28c of the left and right side edges provided on the bottom plate 28a,
Attachment holes 34a and 34c of the mounting plate 28c are attached to the bracket main body # 26 by screws 45a. In this attached state, the locking claws 40a and 40b are received from the front surface of the mounting plate 30, and the locking claws 40a and 40b are received. The plates 29, 29 protrude from the upper surfaces, respectively.

As shown by the solid line in FIG. 7, the tray mounting bracket 6 formed by mounting the support bracket 27 on the bracket main body 26 has the front lower surface of the bottom plate 28a contacting the upper surface of the outer casing 9 of the mounting member 5. By screwing the screw pieces 45b, 45b inserted through the front mounting holes 33a, 33a at the center position of the bottom plate 28a into the mounting holes 24, 24 of the outer casing 9 in a state of being in contact with the mounting member 5, An attachment device is configured.

The tray B attached to the attachment device of the present application includes:
As shown in FIGS. 6 and 7, left and right side plates 47 and 4 are attached to the bottom plate 46a.
An L-shaped metal attachment piece 50 extending from the bottom plate 46a to the back plate 46b is attached to the center of the bottom surface of the synthetic resin tray body 49 in which the tray body 4 and the back plate 48 are integrally molded.
9 and engagement holes 51 and 52 which engage with the locking claws 40 and 41 of the support fitting 27 on the vertical plane and the horizontal plane at the bent portion position, respectively. Are provided respectively.

Thus, the top plates A, A are joined and the two desks are installed facing each other, and the support rod 4 of the support member 1 attached to one of the desk tops A via the support arms 3, 3 is provided. When the tray member B is mounted, first, the screw member 23 is retracted outward, and the movable holding piece 17 is separated from the fixed holding piece 16 by the urging force of the urging spring 20, as shown in FIG. In this state, the support rod 4 is inserted into the mounting body 11 from the lower surface entrance 7 of the mounting body 11 and fitted to the fixed holding portion 15. In this state, the screw member 23 is rotated to rotate the rotation member 1.
When the lower back surface of the pressure member 9 is pressed, the rotating member 19 rotates vertically against the biasing force of the biasing spring 20 and is supported by the fixed holding portion 15 and the movable holding piece 17 as shown in FIG. The rod 4 is held from the front-rear direction. In this manner, the mounting member 5 on which the tray mounting bracket 6 is mounted by the screw 43 is attached to the upper surface of the supporting rod 4 of the supporting member 1.

Next, while the corners of the mounting portion 51 of the tray B are opposed to the right-angle inner surfaces of the left and right locking portions 37, 37 of the support fitting 27 of the tray mounting bracket 6, the left and right locking portions 37, 37 The engaging holes 51a, 51b provided on the vertical surface of the mounting piece 50 are locked by the upper locking claws 40a, 40b, and the locking claws 40a, 40b are turned around the locking portion in the falling direction to turn left and right locking portions. Locking claws 41a, 41b at the lower part of the pieces 37, 37
The single tray B is mounted horizontally on the tray mounting bracket 6 by locking the engaging holes 52, 52 formed in the horizontal plane of the mounting piece 50.

When the tray B mounted horizontally with respect to the tray mounting bracket 6 is removed from the mounting device,
The locking holes 51, 51 and the locking claws 40a, 40b and the locking holes 52, 52 and the support fittings 27 are raised while the tray B is standing upright.
Is disengaged from the locking claws 41a, 41b.

FIG. 8 shows another embodiment in which two tray members B are mounted on the upper surface of the mounting member 5 back to back. The mounting brackets 6a, 6a are abutted against each other in a back-to-back state, and the back plates 28b of the respective bracket main bodies 26, 26 are fastened to each other with bolts and nuts 53.
43 are screwed into the mounting holes 24, # 24 of the outer casing 9, respectively, so that the two tray mounting brackets 6, 6 are mounted on the mounting member 5.
Then, the trays B are respectively mounted on the tray mounting brackets 6 and 6 by the same operation as described above.

FIGS. 9 and 10 show another embodiment in which a single mounting member 5 is used to mount the tray member B to the support rod 4 in a plurality of stages in the vertical direction, in this embodiment, three stages. In the case of this configuration, the mounting member 5 and the tray mounting bracket 6 described above are used.
In addition to the above, as shown in FIG. 11, a long metal plate is bent in a U-shape, and a pair of left and right side connecting rods 55a and 55b having through holes 54 and 54 respectively at its distal end. A rear connecting rod 58 for connecting the back plates 28b of the metal fittings 26 of the tray mounting hardware 6 which are vertically provided with through holes 56 at the center and elongated holes 57 at the upper and lower ends; The distal ends of the side connecting rods 55a and 55b are connected to the bottom plate 28a of the fitting body 26.
And a locking plate 61 provided with nut pieces 60, 60 communicating with the through holes 59, 59 at the left and right positions for mounting respectively.

When the lowermost tray mounting bracket 6 is mounted on the mounting member 5, the left and right side connecting rods 55 are first mounted.
a, 55a is inserted through an insertion hole 35 formed in the metal fitting body 26 of the tray mounting metal fitting 6 into the bottom plate 28.
a, a bolt 63 is provided in the metal fitting body 26 from below, through which the locking plate 61 abuts on the upper surface thereof and the mounting hole 24 formed on the upper surface of the outer casing 9 is inserted from below.
6 and a nut 60 of the locking plate 61a through a through hole 54 formed in the lower rod 62l of the side connecting rod 55.

Next, the distal ends of the upper rods 62h of the left and right connecting rods 55a and 55b are brought into contact with the lower surface of the bottom plate 28a of the metal fitting body 26 of the middle tray mounting bracket 6b, and the lower rod 62l of the upper connecting rod 55b is connected. After the leading end is inserted through an insertion hole 35 provided in the metal fitting body 26 of the middle tray mounting hardware 6 and abuts on the upper surface of the bottom plate # 28a, the locking plate 61 is abutted on the upper surface and the locking plate 61 is abutted on the upper surface. The bolt 63 inserted from below into the mounting hole 24 provided on the upper surface is attached to the bottom plate 2 of the fitting body 26.
8a and the lower rod 6 of the connecting rod 55
The nut piece 6 of the locking plate 61 is inserted through the through hole 54 provided in the 2l.
0, the middle tray mounting bracket 6b and the upper connecting rod 55 are mounted on the upper part of the lower connecting rod 55a.

After arranging the plurality of tray mounting brackets 6 in the vertical direction via the connecting rod 55 in this way, the bracket main body 26 of each of the tray mounting brackets 6c, 6b, 6a.
The back plates 28b are connected to each other by a rear connecting rod 58, and a plurality of tray mounting brackets 6c, 6b, 6a are integrally mounted on the upper surface of the mounting member 5, and in this state, the respective mounting brackets 6c, 6b, 6
The trays 4c, 4b, and 4a are detachably attached to a.

[0021]

As described above, according to the present invention, the tray member can be stably mounted on the support rod provided at the joint portion of the desks arranged face to face, for example. The tray members can be arbitrarily set up in a back-to-back state or in a vertical direction by using a mounting bracket, which is very reasonable and convenient to use. According to this, the mounting member can be attached to the support rod in a state in which no play occurs, and according to the seventh aspect, the support rod can be attached more stably and reliably.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a use state in which a part is omitted.

FIG. 2 is an exploded perspective view of the mounting device.

FIG. 3 is an exploded perspective view of a mounting member.

FIG. 4 is a longitudinal sectional view showing an operation state of a mounting member.

FIG. 5 is a longitudinal sectional view showing another operation state of the mounting member.

FIG. 6 is a perspective view of a tray.

FIG. 7 is a side view showing a state where a tray is attached.

FIG. 8 is a partially omitted side view showing a state where the tray mounting bracket is attached to the mounting member back to back.

FIG. 9 is a side view showing a state where the tray is set up in the height direction.

FIG. 10 is a front view showing a state where trays are set up in the height direction.

FIG. 11 is an exploded perspective view of a case where trays are set up in the height direction.

[Explanation of symbols]

 Reference Signs List A top plate B tray 4 support rod 5 mounting member 6 tray mounting bracket 7 intervening portion 8 outer casing 9 fitting portion 10 side plate 11 mounting body 12 flange 15 fixed holding portion 16 fixed holding piece 17 movable holding piece 18 pivot Reference Signs List 19 rotating member 20 biasing spring 21 nut 23 screw member 24 mounting hole 25 nut 26 bracket main body 27 support bracket 28a bottom plate 28b back plate 28c upward bent portion 29 receiving plate 30 mounting plate 32 mounting hole 35 insertion hole 37 locking portion piece 38a vertical piece 38b horizontal piece 39 connecting plate 40, 41 locking claw 55 side connecting rod

 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-3-15408 (JP, A) JP-A-2-144005 (JP, A) JP-A-2-132439 (JP, U)

Claims (7)

(57) [Claims] 1. A mounting member which is mounted on a support rod mounted on a tabletop of a desk so as to be mounted thereon, and a tray mounting bracket which is mounted on an upper surface of the mounting member and which detachably locks a tray. The mounting member has an intervening portion having an entrance that allows the support rod to be fitted from the lower surface. A fixed holding portion for holding, and a vertically rotatable rotatable member having a movable holding piece for holding another portion of the outer periphery of the support rod are provided, and the rotatable member is fixedly held at all times. A biasing spring for biasing in a direction away from the portion, and externally operable screw means screwed to the mounting body to press the rotating member in the direction of the fixed holding piece; The mounting bracket has a vertical part and a horizontal part, and the corner of the tray A tray mounting device for a tray, comprising a locking claw for locking an engagement hole provided on an outer surface of the tray. 2. The tray mounting apparatus according to claim 1, wherein two tray mounting brackets are attached to the upper surface of the mounting member in a back-to-back manner. 3. A mounting member detachably mounted on a support rod mounted on a tabletop of a desk, a tray mounting bracket mounted on an upper surface of the mounting member and detachably locking a tray, and a vertical rod. A pair of left and right side connecting rods, the lower rod of which is fixed to the upper surface of the bottom of the tray mounting bracket, the upper rod is fixed to the lower surface of the bottom of the tray mounting bracket, and connects the tray mounting brackets at the upper and lower positions. The mounting member is provided on the mounting body having an entrance portion allowing the support rod to be fitted from the lower surface, so that the mounting member faces the front and rear directions with the entrance portion position therebetween. A fixed holding portion for holding a part of the periphery and a vertically rotatable rotating member having a movable holding piece for holding the outer periphery of the supporting rod are provided. A biasing spring for biasing in a direction away from the fixed holding portion;
Externally operable screw means that is screwed to the mounting body and presses the rotating member in the direction of the fixed holding piece,
A tray mounting bracket having a vertical portion and a horizontal portion, and a locking claw for locking with an engaging hole provided on an outer surface of a corner portion of the tray at a right angle portion thereof; Mounting device. 4. A mounting member is provided at the left and right positions of a cylindrical outer casing having a rectangular cross section and having an entrance at the lower surface, and the lower surface is opened at the position of the entrance to engage the support rod. The outer surfaces of the left and right side plates are attached to one end of a hollow mounting body formed by mounting left and right side plates each having an allowable fitting portion, and one end of a flange having a shape substantially matching the outer periphery thereof except for the front surface of the support rod. A pair of left and right fixed holding pieces forming a fixed holding portion inside the mounting body, with the flange facing the inside of the mounting body from the fitting portion, and an inside of the mounting body. And has a shape that fits the front portion of the support rod, and is interposed between the pair of left and right fixed holding pieces to hold the support rod in opposition to the holding portion. A rotating member having a movable holding piece, and an upper end mounted via a pivot in the mounting body; A biasing spring for constantly biasing the movable holding piece in a direction away from the fixed holding portion; 4. The tray mounting apparatus according to claim 1, wherein the mounting body comprises a plurality of mounting holes formed on a top surface of the mounting body. 5. A tray mounting bracket comprising: a bracket main body mounted on an upper surface of a mounting member; and a support bracket for detachably supporting the tray, wherein the bracket main body vertically extends a rear portion of a long metal plate in front and back. And a bottom plate and a back plate are integrally formed, and the front edge and the left and right side edges of the bottom plate are bent upward, and the upper edges of the left and right side edges are further bent inward to receive the bottom plate. A plate is formed, and the upper edge and the left and right side edges of the back plate are bent forward, respectively, and the front edge of the upper edge is bent further downward to form a mounting plate. A mounting hole is provided at a position, and a mounting hole is formed at the center of the bottom plate so as to match the mounting hole of the mounting member. The left and right locking pieces made of a metal plate bent in a shape are integrally opposed to each other, and the upper edge front edge of the vertical piece of the locking piece is And a locking claw formed on the front end upper edge of the horizontal piece, and the supporting bracket is attached to an inner surface of a bent portion formed by a bottom plate and a back plate of the metal fitting body. 2. The device according to claim 1, wherein the first and second plates protrude from the upper surface of the plate.
5. The tray mounting device for a desk according to 2, 3 or 4. 6. A left and right upper bent portion of a bottom plate of a bracket main body,
6. The tray mounting device for a desk according to claim 5, further comprising an insertion hole for inserting a lower rod of the pair of left and right side connecting rods into an upper surface of a bottom plate of the metal fitting body. 7. The tray mounting device according to claim 1, wherein the support rod is formed in a flat elliptical shape.