JPH0119189Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an action support device for a piano, particularly an upright piano.

As shown in the first diagram, a conventional upright piano consists of a support assembly a consisting of a support, a base, etc., a frame d on which a soundboard b and strings c are stretched, attached to the support assembly a. Left and right main plates g, g to which left and right arm trees f, f etc. are glued are connected to the back mechanism e made up of the structure, a shelf board h is horizontally connected to the left and right arm trees f, f, and the shelf board h
An action bracket base j is mounted on top, and an action k is supported facing the frame d via a bolt i engaged with the action bracket base j.Next, a damper and a hammer are mounted on the action k, and a keyboard is mounted on the shelf h. It was assembled through the steps of arranging the pillow n and the keyboard o, adjusting the height of the keyboard o, etc., and then attaching case members (not shown) such as the upper front plate, lower front plate, and roof plate. .

However, since the action k of this device is supported by the shelf h via the action bracket base j, an error occurs each time the parent plate g is attached to the back mechanism e and the shelf plate h is attached to the parent plate g. is accumulated,
After installing the action k, you will not be able to hit the desired string position with the hammer unless you repeat the adjustment many times. In addition, there are many steps from connecting the left and right main plates g to the back mechanism e to attaching the case member, and these steps must be performed in sequence, so the tools used for the work may accidentally damage the main plate g, etc. There is a high probability of scratching the painted surface, and it takes a lot of time to manufacture, and the cost increases because the mother plate and the like must be prepared early in the manufacturing process.

The purpose of the present invention is to provide an action support device for a piano that does not have such inconveniences. A reference hole 18 is drilled in the support assembly 1 through the soundboard 2 on both sides of the front side of the back mechanism 5, which consists of a frame 4 on which strings 3 positioned and attached to the assembly 1 are stretched. Then, the action support member 6 is fitted and attached to the reference pin 19 implanted in the reference hole 18, and the bolt 16 is attached to the action support portion 9 of the support member 6 via the action bracket base 12. A bracket 20 for supporting the action 7 is supported by the bolt 16.

Embodiments of the present invention will be described below with reference to the drawings.

2 to 5 show one embodiment of the present invention.
In FIG. 5, the action support member 6 is formed by punching, for example, an iron plate into a predetermined shape and bending it to form a back mechanism attachment portion 8 and an action support portion 9, and the back mechanism attachment portion 8 has holes 10, 10. A hole 11 is formed in the action support part 9, and the hole 1
1, the upper end flange 14 of the bush 13 driven into the action bracket base 12 is fitted to fix the base 12 to the action support part 9, and the bolt 16 is screwed into the threaded hole 15 of the bush 13. The pillars on both the left and right sides of the front of the cross mechanism 5, which consists of a pillar assembly 1 consisting of pillars, a base, etc., a frame 4 on which a soundboard 2 and strings 3 are stretched, are attached to the pillar assembly 1. When the base 17 of the action support member 6 is attached and the reference holes of the back mechanism 5 are bored in the base 17, the reference holes 18, 18 are formed.
are drilled, and a reference pin 19 is inserted into the reference hole 18, 18.
19 were planted. Then, the reference pins 19, 19 were fitted into the holes 10, 10 of the action support member 6, and the member 6 was attached to the back mechanism 5. Thus, by fitting the concave groove 21 at the lower end of the action bracket 20 to the tip of the bolt 16, the hammer 22 can strike the string 3 at a predetermined position.The action 7 is mounted at a predetermined position of the back mechanism 5 with high precision. I made it possible.

In FIG. 2, 23 is a keyboard unit, and the keyboard unit 23 consists of a shelf board 24 and a keyboard 25. After the keyboard 25 is attached to the shelf board 24, the keys are aligned in a straight line when the key is pressed and when the key is released. It has been adjusted as follows. Reference numeral 25 denotes a main plate, and the main plate 25 has a arm 26 connected thereto, and is fixed in a predetermined position with respect to the back mechanism 5 by aligning its reference hole with the reference hole of the back mechanism 5. and a member 27 installed horizontally on the inner surface of the arm 26.
Then, the keyboard unit 23 is attached by aligning the reference hole with the reference hole of the keyboard unit 23.

To attach the main plate 25 etc. to the back mechanism 5 and attach the keyboard unit 23 to the arm 26, attach the action 7 to the back mechanism 5, and then attach the action 7 to the back mechanism 5.
A damper 28 and a hammer 22 are attached to the shaft, and this is done after adjusting the action 7 and the string 3.
After this, case members (not shown) such as an upper front plate, a lower front plate, and a roof plate are attached to the back mechanism 5 etc. in the same manner as in the conventional case.

The back mechanism 5 is constructed by attaching the soundboard 2 and the pin plate to the strut assembly 1, drilling a reference hole, and then attaching the frame 4, the action 7, and the main plate 2 based on the reference hole.
5 etc. installation reference points are set to ensure connection accuracy between each part. Do the same for other parts.

In this way, according to the present invention, the soundboard 2 attached to the strut assembly 1 and the strings 3 positioned and attached to the strut assembly 1 based on the drilled reference holes are stretched. A reference hole 18 is drilled in the support assembly 1 through the soundboard 2 on both sides of the front left and right sides of the back mechanism 5, which is made up of a frame 4 and a frame 4. The support member 6 is fitted and attached, and the bolt 16 is inserted into the action support portion 9 of the support member 6 via the action bracket base 12.
A bracket 20 supporting the action 7 is supported by the bolt 16. As a result, the accuracy of attaching the action 7 to the string 3 can be improved compared to conventional ones, and the assembly process can be performed in parallel, reducing manufacturing time, reducing costs, and reducing the cost of the main plate. This has the effect of reducing the probability of damaging objects, etc.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a conventional upright piano, Fig. 2 is an exploded perspective view of an embodiment of the present invention, Fig. 3 is a sectional view taken along the line - - of Fig. 2 in an assembled state, and Fig. 4 is an exploded perspective view of a conventional upright piano. FIG. 5 is a partially cutaway side view of the action support portion, and FIG. 5 is an exploded perspective view of the same portion. 1... Strut assembly, 2... Soundboard, 3... Strings, 4...
... Frame, 5... Back mechanism, 6... Action support member, 7... Action, 12... Action bracket base, 16... Bolt, 18...
...Reference hole, 19...Reference pin, 20...Bracket.

Claims (1)

[Scope of utility model registration request] A back mechanism consisting of a soundboard 2 attached to a strut assembly 1, and a frame 4 on which a string 3 is stretched, which is positioned and attached to the strut assembly 1 based on a drilled reference hole. A reference hole 18 is drilled in the support assembly 1 on both left and right front sides of the soundboard 2, and the action support member 6 is fitted and attached to the reference pin 19 implanted in the reference hole 18. An action support device for a piano, in which a bolt 16 is attached to the action support part 9 of the support member 6 via an action bracket base 12, and a bracket 20 for supporting the action 7 is supported by the bolt 16.