JPH073438Y2 - Mounting table for keyboard - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a keyboard mounting table in which a leg frame can be folded into a used state and an unused state with respect to a mounting frame.

<Prior Art> A conventional folding keyboard mounting table is configured such that a leg is rotatably attached to a mounting member and a supporting column is obliquely bridged between the mounting member and the leg to dispose the mounting member. The leg opening degree is determined, and the leg is prevented from rotating due to the weight of the keyboard placed on the placing member. Moreover, the appearance of the supporting pillars is not good in appearance.

<Problems to be solved by the invention> However, in the above-mentioned conventional keyboard mounting table, since the supporting pillars are bridged between the mounting member and the legs, the keyboard mounting table is folded and carried around. This support pillar gets in the way.

<Means for Solving the Problems> The present invention has been proposed in view of the above, and is configured by two mounting frames having a mounting portion and a leg frame mounting portion at the ends, and the lateral width is adjustable. Frame, and left and right leg frames each having a mounting frame mounting portion rotatably mounted on the leg frame mounting portion at the upper end, and the leg frame mounting portion and the mounting frame mounting portion respectively include , A disk portion for mounting, the disk portion of the leg frame mounting portion is a concentric arcuate ridge centered on the shaft hole, and a fan-shaped support member on a part of the outer periphery. The concentric, arcuate groove-shaped guide portion that engages with the protruding portion and the fan-shaped supporting member on a part of the outer periphery are provided on the disk portion of the mounting frame mounting portion, and the protruding portion is provided. Section and the surface of the groove-shaped guide section, and at the time of engagement, the protruding section and the front section. The disk portion with which the groove-shaped guide portion abuts has a tooth portion, and the raised portion and the groove-shaped guide portion restrict the rotation range of the mounting frame and the leg frame. The leg frame supports the mounting frame by contacting the circumferential ends of the fan-shaped supporting members provided on the leg frame mounting part and the mounting frame mounting part with each other.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a keyboard mounting table 1 according to the present invention is rotatably attached to a frame 2, a mounting portion 3 provided on an upper surface of the frame 2, and both ends of the frame 2. It is composed of left and right leg frames 4 and leg portions 5 attached to the lower ends of the leg frames 4.

The frame 2 described above includes a first mounting frame 2a and a second mounting frame 2b having an insertion portion 6 for insertion into the inside of the first mounting frame 2a.

The first mounting frame 2a is made of a hollow rectangular tube-shaped member, has an opening 7 for inserting the insertion portion 6 of the second mounting frame 2b at one end, and has a hinge device at the other end. A first leg frame attachment portion 8 which is a portion is provided.

Further, the second mounting frame 2b has a configuration in which the insertion portion 6 is extended from a hollow and short rectangular tubular member, and is a part of the hinge device at the base end of the rectangular tubular member. A leg frame attachment portion 9 is provided. The outer dimension of the insertion portion 6 is slightly smaller than the inner dimension of the first mounting frame 2a, and the length thereof is shorter than that of the first mounting frame 2a. Therefore, the insertion portion 6 can be inserted through the opening 7 into the first mounting frame 2a.

Then, the first leg frame mounting portion 8 of the first mounting frame 2a
On the side and the upper surface of the second mounting frame 2b on the side of the second leg frame mounting portion 9, the mounting portion 3 is mounted so as to be orthogonal to the length direction of the both mounting frames 2a and 2b. The mounting portion 3 has a long hole 10 and a round hole 11 for fitting leg projections provided on the lower surface of a keyboard (not shown),
A leg projection can be fitted into the long hole and the round hole 11 to stably fix the keyboard to the mounting portion 3.

Therefore, by inserting the insertion portion 6 of the second mounting frame 2b into the opening portion 7 of the first mounting frame 2a, the mounting frames 2a and 2b can be integrated to form a mounting table. it can. Further, since the lateral width of the mounting table can be adjusted by changing the insertion length of the insertion portion 6, it is possible to handle a plurality of keyboards having different widths.

A screw hole is provided on the side surface of the first mounting frame 2a on the side of the opening 7, and a screw 12 is screwed into the screw hole to bring the tip of the screw 12 into contact with the outer side surface of the insertion portion 6. If the first mounting frame 2a and the second mounting frame 2b are firmly fixed to each other, it is possible to eliminate the risk that the lateral width of the mounting table shifts and the mounted keyboard falls during the performance.

The leg frame 4 is made of a hollow rectangular tubular member, and has a lower end through which an insertion opening 14 for inserting the insertion frame 13 of the leg portion 5 is provided, and an upper end which is a mounting frame which is a part of a hinge device. A mounting portion 15 is provided. In addition, as shown in FIG. 2, adjustment holes 17 for inserting the height adjustment bolts 16 are formed on both lower and front side surfaces of the leg frame 4 side by side so as to form a series of front and rear. is there. On the other hand, the leg portion 5 includes an insertion frame 13 which is inserted into the leg frame 4, and legs 18 which are laterally projected from both front and rear side surfaces of the lower end of the insertion frame 13.

The outside dimension of the insertion frame 13 is slightly smaller than the inside dimension of the leg frame 4, and the length thereof is shorter than that of the leg frame 4. Further, bolt insertion holes 19 for inserting the height adjusting bolts 16 are formed on both front and rear surfaces on the upper end side of the insertion frame 13.

Therefore, the insertion frame 13 is inserted into the insertion opening 14 at the lower end of the leg frame 4 from the upper end side, and the height adjustment bolts 16 are arranged in series in any one set of the adjustment holes 17 and the bolt insertion holes 19 which are vertically arranged. Then, by mounting and tightening the nut 20 on the height adjusting bolt 16, the leg portion 5 can be fixed to the leg frame 4.

If the adjuster bolts 21 are attached to both ends of the leg 18 which come into contact with the floor surface, the keyboard mounting table 1 can be stably installed in response to the distortion of the floor surface.

As shown in FIG. 3, the first leg frame mounting portion 8 has a first extension piece 22 extending from the first mounting frame 2a, and
It is composed of a first disk portion 23 extending from the first extension piece 22, and a first shaft hole 24 is opened at the center of the hollow of the first disk portion 23, and a surface (lower side in FIG. 3 (A), Fig. 3 (B)
In the front side), an arc-shaped first protrusion 25 centered on the first shaft hole 24 is provided over about three-eighths circumference (about 135 degrees).
It is provided so as to project from the surface of the first disk portion 23, and a tooth portion 25 ′ is formed on the surface of the first raised portion 25. Then, on the surface of the first disk portion 23 described above, it is concentric with the first protruding portion 25 and is continuous from the first protruding portion 25,
Circular arc-shaped first tooth portions 26 of about ⅜ (about 135 degrees) centering on the first shaft hole 24 are provided substantially flush with the surface of the first disc portion 23.

Further, from the base end of the first extension piece 22 along the outer circumference of the first disk portion 23, about the eighth axis hole 24 as a center, about 1/8 round (about 45 degrees)
The first fan-shaped support member 27 is provided in an arc shape,
The tip of the fan-shaped support member 27 is a first inclined surface 28.

FIG. 4 shows the second leg frame mounting portion 9 described above.

The second leg frame mounting portion 9 includes a second extension piece 29 extending from the second mounting frame 2b and a second disk portion 30 extending from the second extension piece 29. A second shaft hole 31 is formed substantially in the center of the portion 30, and about three-eighths of the circumference (about 135 degrees) is formed on the surface (lower side in FIG. 4 (A), front side in FIG. 4 (B)). ), An arc-shaped second protrusion 32 centering on the second shaft hole 31 is provided so as to protrude from the surface of the second disk portion 30, and the surface of the second protrusion 32 is A tooth portion 32 'is formed on the. Then, the above-mentioned second
The surface of the disk portion 30 is concentric with the second raised portion 32 and is continuous from the second raised portion 32, and is approximately three-eighths of the circumference around the second shaft hole 31 (about 135 degrees) arc-shaped second tooth 33
Are provided substantially flush with the surface of the second disc portion 30.

The above-mentioned second extension piece 29 makes the vertical position of the first shaft hole 24 of the first leg frame mounting portion 8 and the second shaft hole 31 of the second leg frame mounting portion 9 different from each other. The second shaft hole 31 of the second leg frame mounting portion 9 is located below the first shaft hole 24 of the mounting portion 8, and the vertical difference is slightly wider than the left and right width of the leg frame 4. . Therefore, when the leg frame 4 is folded substantially parallel to the frame 2, the first leg frame 4a overlaps the lower side of the frame 2 and the first leg frame 4a
The second leg frame 4b overlaps the lower side of 4a.

Further, from the lower side of the second mounting frame 2b along the outer circumference of the second disk portion 30, about the eighth shaft hole 31 as a center, about one eighth (about
The second fan-shaped support member 34 of 45 degrees) is provided in an arc shape, and the tip end of the second fan-shaped support member 34 is a second inclined surface 35.

As shown in FIG. 5, the mounting frame mounting portion 15 has a third extension piece 36 extending from the upper end of the leg frame 4,
It comprises a third disk portion 37 extending from the third extension piece 36, and a third shaft hole 38 is opened at approximately the center of the third disk portion 37. Further, on the surface of the third disc portion 37 (front side in FIG. 5A, left side in FIG. 5B), about 5/8 round (about 225 degrees), centering on the third shaft hole 38 A circular arc-shaped groove-shaped guide portion 39 is provided, and the bottom surface of the groove-shaped guide portion 39 is a tooth that meshes with the tooth portions 25 ', 32' of the first raised portion 25 or the second raised portion 32. The part 39 'is formed only about three-eighths.

Then, on the surface of the above-mentioned third disk portion 37, a third tooth portion 40 which is concentric with the groove-shaped guide portion 39 and which is continuous from the groove-shaped guide portion 39 is formed substantially on the surface of the disk portion 37. The third tooth portion 40 is provided only for about three-eighth circumference, and the third tooth portion 40 is a tooth portion of the first leg frame attachment portion 8 or the second leg frame attachment portion 9.
Can mesh with 26, 33. Further, from the base end of the third extension piece 36, along the outer circumference of the third disk portion 37, about the third axial hole 38 as a center, the third fan-shaped support member 41 of about 1/8 round (about 45 degrees).
Is provided in an arc shape, and the tip end of the third fan-shaped support member 41 is a third inclined surface 42.

Since the groove-shaped guide portion 39 has an angle difference that is longer than the first ridge 25 or the second ridge 32 by about a quarter round (about 90 degrees), the first leg of the frame 2 described above. The first protruding portion 25 and the second protruding portion 32 provided on the frame mounting portion 8 and the second leg frame mounting portion 9 and the groove-shaped guide portion 39 provided on the mounting frame mounting portions 15 of the left and right leg frames 4. In, the rotation of the leg frame 4 is regulated from a position substantially parallel to the frame 2 to a position at a substantially right angle.

Therefore, in order to attach the left leg frame 4a to the frame 2 described above, as shown in FIG. 6, the left leg frame attaching member 8 is installed in the groove-shaped guide portion 39 provided in the mounting frame attaching portion 15. The first protruding portion 25 provided is fitted into the third shaft hole.
38 and a fastening bolt 43 which is a part of a locking member for the first shaft hole 24.
The fastening nut portion 45 of the fastening lever 44, which is one component of the fastening member, may be screwed from the tip of the fastening bolt 43 through the above. When the fastening nut portion 45 is loosened by the fastening lever 44, as described above, the groove-shaped guide portion 39 and the first protruding portion are provided.
Since the left leg frame 4a can rotate by an angle difference (about 90 degrees) from 25, the left leg frame 4a can rotate from a state substantially parallel to the frame 2 to a state substantially at right angles. it can. Then, in a state where the left leg frame 4a and the frame 2 are substantially perpendicular to each other, and one end of the groove-shaped guide portion 39 abuts on one end of the first protruding portion 25 and rotation is restricted, Fastening nut 44 and fastening bolt 43 by fastening lever 44
By tightening, the third fan-shaped support member 41 meshes with the first fan-shaped support member 27, and furthermore, the first protruding portion 25 and the groove-shaped guide portion.
The left leg frame 4a is restricted from rotating by contacting the end portion with 39, and the tooth portion 25 'and the tooth portion 39' mesh with each other. Further, the third tooth portion 40 and the first tooth portion 26 are meshed with each other, the left leg frame 4a is in an open state and firmly fixed to the frame 2, and the keyboard mounting table 1 is in a usable state. You can

However, the fastening bolt 43 and the fastening nut portion 45 are loosened by the fastening lever 44, the leg frame 4 is rotated until it is substantially parallel to the frame 2, and the other end of the first protruding portion 25 is grooved. Guide part
The other end of 39 is brought into contact, and the fastening lever 44 secures the fastening bolt.
By re-tightening 43 and the fixing nut portion 45, the keyboard mounting table 1 can be folded into an unused state.

The right leg frame 4b can also be attached to the mounting frame 2 in the same manner as the left leg frame 4a, and its rotation can be restricted.

In addition, in the use state in which the legs are opened, the first fan-shaped support member 27, the second fan-shaped support member 34, and the third fan-shaped support member 34 are used.
When the fastening bolts 43 and the fastening nut portions 45 are tightened by the fastening levers 44, the respective inclined surfaces 28, 35, 42 of 41 are crimped by the respective disc portions, and the inclined surfaces have the same effect as a wedge. ,
The leg frame 4 and the frame 2 can be fixed more firmly.

<Effect of the Invention> As described above, the keyboard mounting table according to the present invention is composed of two mounting frames and has a lateral width adjustable frame and left and right leg frames. Each of the leg frame mounting portion and the mounting frame mounting portion of the leg frame has a disc portion for mounting, and the disc portion of the leg frame mounting portion has a concentric shape around the shaft hole. A circular arc-shaped ridge and a fan-shaped support member are provided on a part of the outer periphery, and a concentric arc-shaped groove-shaped guide that engages with the ridge is provided on the disk portion of the mounting frame mounting portion. And a surface of the groove-shaped guide portion, and a disk portion with which the protrusion and the groove-shaped guide portion come into contact with each other when engaged. Has a tooth portion, and the raised portion and the groove-shaped guide portion are provided on the mounting frame and the leg frame. When the leg frame is mounted on the leg frame mounting portion and the mounting frame mounting portion, the leg frames are mounted by the circumferential ends of the fan-shaped supporting members contacting each other in a restricted state. It is designed to support a stationary frame. Therefore, in the assembled state in which the mounting table is in use, the leg frame becomes extremely stable due to the engagement of the tooth portions between the disc portion of the frame and the disc portion of the leg frame, so that the keyboard can be reliably supported. Yes, you can play in a stable state. Further, when the leg frame is open, fan-shaped support members for supporting the leg frame are provided on the left and right sides of the frame and the left and right leg frames, so that diagonal reinforcement between the frame and the leg frame is provided. There is no need to provide support columns or the like. Therefore, it does not get in the way during playing or during transportation, is extremely easy to handle, and has a good appearance. Moreover, since the fan-shaped support members provided on the frame and the leg frame engage with each other when the mounting table is in use, the opening between the frame and the leg frame is determined, and the leg frame can be held very stably. Since it does not rock or vibrate due to its own weight or the force of the performer during performance, it can be stably provided for performance and has a high practical value.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a perspective view of a keyboard mounting table, FIG. 2 is an exploded perspective view of a leg frame and legs, and FIG. 3 is a first leg frame mounting portion. , Third
Figure (A) is a sectional view of an essential part, Figure 3 (B) is a plan view, Figure 4 is a second leg frame mounting portion, Figure 4 (A) is a sectional view of an essential part, and Figure 4 (B). Is a plan view, FIG. 5 is a frame mounting portion, FIG. 5 (A) is a plan view, FIG. 5 (B) is a cross-sectional view taken along line BB of FIG. 5 (A), and FIG. 6 is a frame. FIG. 3 is an exploded perspective view of a main part of the leg frame. In the figure, 1 is a keyboard mounting table, 2 is a frame, 3 is a mounting portion, 4 is a leg frame, 5 is a leg portion, 8 and 9 are leg frame mounting portions, 15 is a leg frame mounting portion, and 25 and 32 are Ridge, 26,
33 and 40 are tooth portions, 27, 34 and 41 are fan-shaped support members, and 39 is a groove-shaped guide portion.

Claims (1)

[Scope of utility model registration request] 1. A frame which is composed of two mounting frames having a mounting portion and a leg frame mounting portion at an end thereof and whose lateral width is adjustable, and a mounting body which is rotatably mounted on the leg frame mounting portion. The left and right leg frames having a mounting frame mounting portion at the upper end, the leg frame mounting portion and the mounting frame mounting portion each have a disc portion for mounting, The disk part is provided with a concentric arcuate bulge centered on the shaft hole and a fan-shaped support member on a part of the outer periphery. Concentric arcuate groove-shaped guide portion that engages the portion, and a fan-shaped support member on a part of the outer periphery, the surface of the raised portion and the groove-shaped guide portion, and at the time of engagement,
The disk portion where the protruding portion and the groove-shaped guide portion contact each other has a tooth portion, and the protruding portion and the groove-shaped guide portion regulate the rotation range of the mounting frame and the leg frame, and the leg opening is performed. In the state, the leg mount supports the mounting frame by the leg frame mounting part and the circumferential ends of the fan-shaped supporting members provided on the mounting frame mounting part abutting each other.