JPH09114448A - Music stand device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a music stand without generating the uncomfortable resonance noises by playing, low in cost, simple in constitution, and easily erectable by raising the music table. SOLUTION: A coupling rotary part 4J is provided with an energizing means 4S for energizing a supporting plate 43 for supporting a music plate 3 in the direction of opposedly coming close to a fixing plate 42 for fixing the music plate 3. Any of the surfaces of the fixing plate 42 or the supporting plate 43 facing each other at the time of forming the narrow angle of both plates is provided with a stopper piece 426 for stopping the surface in a prescribed angle position of the music plate 3 with respect to a music plate stage 1. A mounting plate 41 is provided with a detaining part 41a for allowing the supporting plate 43 to maintain the prescribed angle position when the music plate 3 is set at the prescribed angle position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a music stand device used for keyboard musical instruments and the like.

[0002]

2. Description of the Related Art A music stand is generally provided on a roof board, and a music stand that can be automatically erected and erected only by so-called knocking operation by repeating the standing and erection operations of the music board. Although the device is conventional, this music stand device,
Although it is easy to operate, it has a complicated structure and is not durable.
The cost was high. Therefore, a music stand device that can be easily erected only by the standing operation and can be erected only by the lifting operation is considered to be exemplified in JP-B-53-15303. In this prior art, a ring structure of four axes and four links consisting of one mounting plate, one fixing plate, and two supporting plates is formed, and a coil spring for urging outward is interposed on a coupling shaft between the mounting plate and the supporting plate. As a result, it is possible to stand upright only by lifting the music plate.

[0003]

However, in the above-mentioned prior art, although the regulation plate is interposed between the two support plates to stabilize the standing state, the four-link ring is set even when the music plate is erected. Since the structure is maintained, even if hinges are formed on each axis during manufacturing, even if hinges are formed by holding the free end of the music plate by hand and repeating the standing operation inadvertently, the support plate overlaps. Rattling occurs on the three shafts provided in the. In particular, the rattling of the shaft portion between the fixing plate and the support plate, where the force of the spring is weak, causes the support plate (metal fitting or shaft) to resonate with a relatively low performance sound such as accompaniment and cause unpleasant sound. In addition, since there is no play between the links, in other words, the structure is inconvenient if play is generated, it can be said that the structure is fragile because a large force is applied to each axis when standing. Furthermore, the complicated structure including the four-axis four-link and the regulation plate requires a long time for assembling, resulting in a high cost. There were many problems like this.

Therefore, in order to solve these problems, the present invention does not generate an unpleasant resonance noise sound due to the performance, has a simple structure and is inexpensive, and can be easily erected by only the operation of lifting the music plate. An object of the present invention is to provide a music stand device that can be used.

[0005]

In order to achieve the above object, a music stand apparatus of the present invention is such that a mounting plate 41 is fixed to a mounting table (roof plate) 1 and a fixing plate 42 is fixed to a music plate 3. One of the plates 41 and 42 is rotatably connected to each other, and
1 is a free end, and the other side 432 is provided on the other side 422 of the fixed plate 42 via the coupling rotary portion 4J, and a music plate support plate 43 rotatably fixed is provided, whereby the music plate 3 is placed on the mounting table 1 In a music stand device that can be placed upright and upside down, the support plate 43 can be attached to the fixed plate 42.
A biasing means 4S for biasing the two to face each other is provided on the coupling rotating portion 4J, and one of the surfaces 425, 435 opposed to each other at the time of forming both the plate narrow angles of the fixed plate 42 or the support plate 43. , A stopper piece 426 that stops at a predetermined angular position of the music plate 3 with respect to the mounting table 1 is provided, and when the music plate 3 is set at the predetermined angular position, one side 431 of the support plate 43 maintains substantially the predetermined angular position. The locking portion 41a for this purpose is provided on the mounting plate 41.

The present invention as described above operates as follows. When the music plate is inverted, the angle between the support plate 43 and the fixed plate 42 is maximized against the biasing force of the biasing means 4S such as a coil spring, and the support plate 43 is supported by the weight of the music plate 3.
The free end of the mounting plate 41 goes over the locking portion 41a of the mounting plate 41 and abuts on the mounting table to maintain the inverted state. From this state, when the free end 31 of the music plate is held by hand and is erected in the front direction D1, the free end of the support plate 43 slides on the mounting table, and the urging force of the urging means 4S gradually increases. It is opened, and the free end passes over it while contacting the locking portion 41a, and is positioned at the locking portion 41ai in the mounting plate 41. In this case, even if the music score plate 3 is further tilted toward the front D1 due to excessive force, the support plate 43 is rotated by the stopper plate 426 with the fixed plate 42 at a predetermined angle. When the music score plate 3 is slightly returned and rotated (D2) from this state, the free end comes into contact with the locking portion 41ai (inside), and the standing state is stable. In the case of inclining, holding the free end of the support plate 43 by hand, and slightly tilting the music plate while positioning the free end from the locking portion 41a to the outside of the mounting plate 41, the free end is placed on the mounting table. Abut. After that, the free end is slid on the mounting table and settles in the above-mentioned inverted state only by inclining only the music plate (see the alternate long and short dash line in FIG. 3).

Further, in the music stand apparatus of the present invention, in order to achieve the above object, the stopper piece 426 is also used as a stopper for fixing one of the biasing means 4S1. Thereby, the music stand apparatus can be simplified and the cost can be reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A perspective view of a music stand device according to the present invention is shown in FIG. 1 as an overall external view, and a hinge 4 for holding a music plate 3 rotatably with respect to a roof plate (mounting table) 1 is shown. Details are shown in FIG. 2 as a front view, a side view and a rear view, and the music plate 3
Fig. 3 is a side view of the roof plate 1 rotatably attached to the roof plate 1.
Shown in FIG. 3 also shows a state in which the music plate is laid down by a chain line.

As shown in FIG. 1, the music stand apparatus of the present invention is arranged on a table such as a roof plate 1 of a keyboard instrument, and has a music stopper (music score receiver) 2, a music plate 3 and a hinge 4. Consists of.
As shown in FIGS. 2 and 3, the hinge 4 has a rotating portion A on one side.
Is provided with a locking portion 41a on the other side, a mounting plate 41 fixed to the roof plate 1 with screws or the like (not shown), and the rotating portion A on one side.
A rotary part B rotatably coupled to the other side by a coaxial a1 and a rotary part C on the other side are provided, and a fixed plate 42 fixed to the music score plate 3 through a screw hole 423 by a screw or the like (not shown) and one side 43.
1 is a free end, and the other 432 is the rotating portion C and the rotating portion D.
And a support plate 43 rotatably fixed to the other side 422 of the fixed plate 42 via a joint rotation portion 4J composed of a triangular shape.

A rotating part D is provided on the other side 432 of the support plate 43, a rotating part C is provided on the other side 422 of the fixed plate 42, and a combined rotating part 4J is formed by inserting the coaxial a2 into both rotating parts C and D.
An urging means (coil spring) 4S for urging the support plate 43 toward the face of the fixed plate 42 is provided so as to face each other when the fixed plate 42 or the support plate 43 is formed at a narrow angle. Either side 425,43
5 is provided with a stopper piece 426 that stops at a predetermined angle position of the music plate 3 with respect to the mounting table 1, and when the music plate 3 is set at the predetermined angle position, one side 431 of the support plate 43 is substantially the above predetermined position. A locking portion 41a for maintaining the angular position is provided on the mounting plate 41.

The stopper 426 also serves as a stopper for fixing one of the biasing means 4S1. The other side 4S2 of the coil spring 4S is the support plate 43.
Is locked by a spring locking piece 437 projecting outward from the above, and this locking piece 437 also serves as a stopper for abutting the back surface 33 of the music score plate when it is laid down and protecting it from being over-mounted.

When the music plate is inverted, the angle formed by the support plate 43 and the fixed plate 42 against the urging force of the urging means 4S as shown by the alternate long and short dash line in FIG. Degree). Since the plates extending from both rotating parts C and D are displaced by the rotation, the angle is 160 to 170 degrees accurately. At this time, the sliding member 438 provided on the free end (one side) 431 of the support plate 43 abuts on the mounting table due to the weight of the musical score plate 3,
It is maintained in the inverted state. Then, when the music plate is erected, as shown by the solid line in FIG. 3, the sliding member 438 bends the end portion of the mounting plate 41, and the inner side 41a of the locking portion 41a.
Positioned at i to maintain a stable standing condition.

By tightly tightening the rotating parts A and B and the shaft a1 so as to generate a frictional force, it is possible to prevent noise and to prevent further sudden fall during forward or backward fall. it can. Further, during the backward tilting, the acting force acts so that the biasing means strongly biases in the tilting direction, so that the sudden tilting can be prevented.

Further, in the above embodiment, two triangular hinges 4 are used as shown in FIG. 1. When the musical score plate 3 is tilted down, the support plate 43 is held with both hands while the musical score plate 3 is slightly tilted forward. I have to put it back. Therefore, if the shaft a2 and the rotating portion C are fixed and the support plates 43 of the left and right hinges 4 are interlocked with each other, the musical score plate 3 can be inverted even with one hand. Further, if the width of the hinge 4 is increased, the music plate can be installed upright with only a single hinge. In this case, the width of the support plate may be as narrow as that in the previous embodiment. Even with this configuration, the music plate 3 can be inverted even with one hand.

Further, the locking piece 437 as an over-falling prevention stopper that comes into contact with the back surface 33 of the music plate when it is tilted down has a cushioning material such as felt attached to its contact surface 437a. The distance between the surface 437a and the top surface of the roof plate 1 is equal to or slightly larger than the contact height of the coupling rotating portion to the music plate or the height of the base end when the stopper piece 426 contacts the music plate. If set, it will not damage the music plate in any case.

[0016]

According to the present invention, since the biaxial 3-link structure is adopted, the structure is simple, and the support plate is a single member and is always biased by the biasing means 4S. , No unpleasant resonance noise sound is generated by the performance regardless of the installed state. In addition, it can be easily erected by only lifting the music plate. Further, even if the lifting operation at the time of standing is performed excessively, a large force is not generated in the shaft portion, and the durability is good.

[Brief description of the drawings]

FIG. 1 is an overall external perspective view of a music stand device according to the present invention.

FIG. 2 is a detailed view of a hinge 4 which constitutes a main part of the present invention.

FIG. 3 is a side view in which a music plate 3 is rotatably attached to a roof plate 1.

[Explanation of symbols]

1 ... Mounting table (roof plate), 3 ... Music plate, 4 ... Hinge, 41 ... Mounting plate, 41a ... Locking part, 42 ...
Fixed plate, 422 ... other fixed plate, 426 ... stopper piece, 43 ... support plate, 431 ... one of support plate (free end), 432 ... other side of support plate, 4J ... joint rotating part, 4S ... Biasing means (coil spring)

Claims (2)

[Claims] 1. A mounting plate is fixed to a mounting table, and a fixing plate is fixed to a music plate, one of the plates is rotatably connected to the other, and one of the plates is a free end and the other is fixed via a coupling rotating portion. A music stand device in which a music plate support plate rotatably fixed to the other plate is provided so that the music plate can be erected on the mounting table and placed on the mounting table in a freely tiltable manner. On the other hand, the biasing means for biasing the support plate in the direction of approaching each other face is provided in the coupling rotating portion, and the above-mentioned one of the faces facing each other when forming the narrow angle of both plates of the fixed plate or the support plate is described above. A stopper piece that stops at a predetermined angle position of the music plate with respect to the mounting table is provided, and when the music plate is set at the predetermined angle position, one of the support plates has a locking portion on the mounting plate for maintaining substantially the predetermined angle position. A music stand device characterized by being provided. 2. A music stand device, wherein the stopper piece serves as a stopper for fixing one or the other of the urging means.