JPH07295551A - Bottom plate of upright piano - Google Patents

Bottom plate of upright piano

Info

Publication number
JPH07295551A
JPH07295551A JP6083158A JP8315894A JPH07295551A JP H07295551 A JPH07295551 A JP H07295551A JP 6083158 A JP6083158 A JP 6083158A JP 8315894 A JP8315894 A JP 8315894A JP H07295551 A JPH07295551 A JP H07295551A
Authority
JP
Japan
Prior art keywords
bottom plate
pedal
upright piano
balance
base
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP6083158A
Other languages
Japanese (ja)
Inventor
Tatsuo Furukawa
辰男 古川
Original Assignee
Kawai Musical Instr Mfg Co Ltd
株式会社河合楽器製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kawai Musical Instr Mfg Co Ltd, 株式会社河合楽器製作所 filed Critical Kawai Musical Instr Mfg Co Ltd
Priority to JP6083158A priority Critical patent/JPH07295551A/en
Publication of JPH07295551A publication Critical patent/JPH07295551A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To improve the assembly efficiency of the bottom plate of the upright piano. CONSTITUTION:The base plate part 12 of the steel-made bottom board 10 is nearly in an L shape and composed of a bottom part 14 and a front base 16. At the base part 14, three couples of pedal metal pieces 24a-28b and two couples of balance metal pieces 38a-40b are cut and raised. Further, annular grooved spring receivers 48 and 50 are recessed. This bottom board 10 is manufactured by press machining, so the manufacture process is extremely simplified. Further, the need to assemble support members such as the pedal metal pieces 24a-28b an balance metal pieces 38a-40b, etc., and the toe rail base 16 to the bottom board 10 is eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base plate for an upright piano.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, usually, three pedals 110 are attached to a bottom plate 104 of an upright piano 102 through a pedal hole 108 of a front base 106. As shown in FIG. 5, the pedal 110 was pivotally supported on a pedal metal 112 attached to the bottom plate 104 via wood screws (not shown) via bush bearings 114. A balance 116 is connected to the pedal 110, and a bottom plate also includes a balance metal 120 that pivotally supports the balance 116 via a bush bearing 118 and a spring receiver 124 for holding a spring 122 that biases the balance 116. It was attached to 104.

[0003]

However, since it cannot be said that the assembly efficiency is necessarily good if the pedal metal or the like is attached with wood screws or the like, further improvement in assembly efficiency has been desired.

[0004]

As a means for solving this problem, a bottom plate of an upright piano according to claim 1 is a bottom plate of the upright piano, wherein a metal base plate and the base plate part are provided. And a support portion for supporting a component to be mounted on the bottom plate, the support portion being formed by cutting and raising a part of the base plate.

Further, the bottom plate of the upright piano described in claim 2 is characterized in that, in the bottom plate of the upright piano described in claim 1, a part of the substrate portion is bent to form a front base.

[0006]

In the bottom plate of the upright piano according to the first aspect of the present invention, a support portion for pivotally supporting, for example, a pedal or a balance is formed by cutting and raising a part of the metal base plate portion. Therefore, the work of attaching the support portion to the bottom plate by using wood screws or the like is unnecessary, and the efficiency of assembling the bottom plate is improved.

Further, in the bottom plate of the upright piano of the second aspect, the front base is formed by bending the base plate portion. Since the front base and the bottom plate are integrated, the work of connecting the bottom plate and the front base with a wood screw, which is conventionally performed, is unnecessary, and the assembling efficiency is further improved.

[0008]

EXAMPLES Next, examples of the present invention will be described. As shown in FIG. 1, a bottom plate (hereinafter, also simply referred to as a bottom plate) 10 of an upright piano of the present embodiment is made of steel and includes a substrate portion 12 having a substantially L-shaped cross section. This board part 1
2 is a bottom 14 having a relatively wide width and a front base 16 having a relatively narrow width and rising substantially vertically to the bottom 14.
The bottom portion 14 is a member corresponding to a conventional bottom plate.

The front base 16 has three pedal holes 18,
20 and 22 are bored, and one pedal (not shown) can be inserted through each. On the other hand, as shown in FIGS. 1 and 2, each pedal hole 18 to
A pair of pedal metals 24a, 24b, 26a, 26b, 28a, and 2 are provided at positions corresponding to 22, respectively.
8b is erected by cutting and raising from the substrate portion 12, and a hole 30 associated with cutting and raising is formed adjacent to each pedal metal 24a to 28b. Each pedal metal 24a-28b has one bearing hole 32a,
32b, 34a, 34b, 36a, 36b are bored, and the bearing hole 32a and the bearing hole 32b, the bearing hole 34a and the bearing hole 34b, and the bearing hole 36a and the bearing hole 36b are substantially the same diameter and coaxial. These pedal metal 24a ~
A bush bearing 28b (not shown) made of synthetic resin is inserted into each of the bearing holes 32a to 36b, so that the pedal 28b can pivotally support the pedal as in the conventional pedal metal.

As shown in FIGS. 1 and 2, the bottom portion 14 has two pairs of balance metal 38a, 38b, 4 along the direction intersecting the arrangement of the pedal metals 24a-28b.
0a, 40b are erected by cutting and raising from the substrate portion 12, and holes 42 associated with cutting and raising are formed adjacent to each balance metal 38a to 40b. The balance metal 38a-40b has pedal metal 24a-28b.
Similarly, one bearing hole 44a, 44b, 46
a and 46b are bored, and the bearing hole 44a and the bearing hole 4 are formed.
4b, the bearing hole 46a and the bearing hole 46b have substantially the same diameter and are coaxial with each other. These pedal metals 24a-28b are
A bush bearing (not shown) made of synthetic resin can be inserted into each of the bearing holes 44a to 46b, and a balance (not shown) can be pivotally supported similarly to the conventional balance metal.

Further, as shown in FIG. 1, the bottom portion 14 has a balance metal 38a, 38b and a balance metal 40.
Two annular grooves are provided adjacent to a and 40b and serve as spring receivers 48 and 50, respectively.
As shown in FIG. 3, the cross sections of the spring receivers 48 and 50 are substantially semicircular, and the ends of the coil springs S can be accommodated in the spring receivers 48 and 50. Therefore, when the balance metal is mounted on the balance metal 38a to 40b via the bush bearing, the coil spring S interposed between the balance and the bottom portion 14 can be held by the spring receivers 48 and 50.

Although not shown, the bottom plate 10 is provided with a hole for a wood screw or the like for attaching the bottom plate 10 to the piano body. Bottom plate 10 having such a structure
Is manufactured, for example, by the following procedure. First, by pressing, the pedal holes 18 to 2 are formed in the flat plate-shaped substrate portion 12.
2. Drill the bearing holes 32a to 36b and 44a to 46b. Next, the base plate portion 12 is pressed to cut and raise the pedal metal pieces 24a to 28b and the balance metal pieces 38a to 40b, and the front base 16 is bent and the spring supports 48 are formed.
Depress 50 deformations. In this way, the bottom plate 10 in the state shown in FIG. 1 is manufactured.

As described above, the bottom plate 10 is integrally provided with supporting members such as pedal metals 24a to 28b and balance metals 38a to 40b for supporting the pedals and the balance.
The front base 16 is also integrated. Therefore, it is not necessary to attach a component such as a pedal metal manufactured separately from the bottom plate to the bottom plate with a wood screw or the like, which improves the assembly efficiency. Moreover, since the bottom plate 10 is integrated with the front base 16, the work such as connecting the bottom plate and the front base with wood screws, which has been conventionally performed, is unnecessary, and the assembling efficiency is further improved.

In addition, since the bottom plate 10 can be manufactured only by pressing the steel base plate portion 12, the bottom plate 10 can be manufactured.
The manufacturing process of can be greatly simplified. The bottom plate of the present invention has been described above according to the embodiments, but the present invention is not limited to such embodiments and can be variously implemented without departing from the scope of the present invention.

For example, in the above-mentioned example, the bottom plate in which the front base is integrated is shown, but it is not necessarily required to be integrated with the front base, and the bottom plate and the front base are manufactured separately as in the conventional case, These can also be connected. Therefore, the bottom plate and the front base can be made of different materials, for example, the front base arranged on the front side of the piano is made of wood and only the bottom plate is made of metal.

Further, although the bottom plate is made of steel in the above-mentioned embodiment, it may be made of metal other than steel. However, considering the price of the material and the ease of processing, it is preferable to use steel.

[0017]

As described above, in the bottom plate of the upright piano according to the first aspect of the present invention, a support portion for cutting and raising a part of a metal base plate portion to support a pedal or a balance is provided. It is formed. Therefore, the work of attaching the support portion to the bottom plate by using wood screws or the like is unnecessary, and the efficiency of assembling the bottom plate is improved.

Further, in the bottom plate of the upright piano according to the second aspect, the front base is formed by bending the base plate portion. Since the front base and the bottom plate are integrated, the work of connecting the bottom plate and the front base with a wood screw, which is conventionally performed, is unnecessary, and the assembling efficiency is further improved.

[Brief description of drawings]

FIG. 1 is a perspective view illustrating a structure of a bottom plate of an upright piano according to an embodiment.

FIG. 2 is a partial cross-sectional view of a pedal metal and a balance metal portion of the bottom plate of the upright piano of the embodiment.

FIG. 3 is a partial cross-sectional view of a spring receiving portion of the bottom plate of the upright piano of the embodiment.

FIG. 4 is a partial cross-sectional view illustrating a structure near a bottom plate of a conventional upright piano.

FIG. 5 is an explanatory diagram of a structure near a pedal and a balance in a conventional upright piano.

[Explanation of symbols]

10 ... bottom plate, 12 ... substrate part, 14 ... bottom part,
16 ... Front base, 24a-28b ... Pedal metal (supporting part), 38a-40b ... Balance metal (supporting part), 48, 50 ... Spring receiving (supporting part).

Claims (2)

[Claims]
1. A bottom plate of an upright piano, comprising: a metal base plate part; and a support part formed by cutting and raising a part of the base plate part to support a component to be mounted on the bottom plate. The bottom plate of an upright piano, which is characterized by that.
2. The bottom plate of an upright piano according to claim 1, wherein a part of the substrate portion is bent to form a front base.
JP6083158A 1994-04-21 1994-04-21 Bottom plate of upright piano Pending JPH07295551A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6083158A JPH07295551A (en) 1994-04-21 1994-04-21 Bottom plate of upright piano

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6083158A JPH07295551A (en) 1994-04-21 1994-04-21 Bottom plate of upright piano

Publications (1)

Publication Number Publication Date
JPH07295551A true JPH07295551A (en) 1995-11-10

Family

ID=13794443

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6083158A Pending JPH07295551A (en) 1994-04-21 1994-04-21 Bottom plate of upright piano

Country Status (1)

Country Link
JP (1) JPH07295551A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10121334B4 (en) * 2000-05-02 2006-08-17 Yamaha Corp., Hamamatsu Unit-mounted pedal mechanisms and keyboard musical instrument equipped therewith

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10121334B4 (en) * 2000-05-02 2006-08-17 Yamaha Corp., Hamamatsu Unit-mounted pedal mechanisms and keyboard musical instrument equipped therewith

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