JPS6243346Y2 - - Google Patents
Info
- Publication number
- JPS6243346Y2 JPS6243346Y2 JP4532582U JP4532582U JPS6243346Y2 JP S6243346 Y2 JPS6243346 Y2 JP S6243346Y2 JP 4532582 U JP4532582 U JP 4532582U JP 4532582 U JP4532582 U JP 4532582U JP S6243346 Y2 JPS6243346 Y2 JP S6243346Y2
- Authority
- JP
- Japan
- Prior art keywords
- pin
- tuning
- frame
- pin plate
- installation part
- 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.)
- Expired
Links
- 238000009434 installation Methods 0.000 claims description 18
- 230000037431 insertion Effects 0.000 claims description 6
- 238000003780 insertion Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Stringed Musical Instruments (AREA)
- Mirrors, Picture Frames, Photograph Stands, And Related Fastening Devices (AREA)
- Electrophonic Musical Instruments (AREA)
Description
【考案の詳細な説明】
この考案はピン板を分割形成し、その反り、捩
れ等を少なくすることにより、ピアノの性能を安
定に保持し得るようにしたピアノのフレーム構造
に関する。[Detailed Description of the Invention] This invention relates to a frame structure for a piano in which the performance of the piano can be stably maintained by dividing the pin plate and reducing warpage, twisting, etc. of the pin plate.
第１図に示すようにピアノのフレーム１は、所
定の張力で張設される複数本の弦２を係止するた
めのもので、一般に鋳鉄等の鋳物によつて略額縁
状に形成されることにより、チユーニングピン３
が打込まれるチユーニングピン植設部４、フレー
ムピン５が打込まれるフレームピン植設部６、重
量軽減のための開口７、弦受山８，９、補強用リ
ブ１０等を備えている。前記チユーニングピン３
はブツシユ１１を介してチユーニングピン植設部
４の下孔１２に打込まれ、その下端部は前記チユ
ーニングピン植設部４の裏面に固定されたピン板
１３の挿通孔１４に挿入保持されている。前記弦
２はその両端が前記チユーニングピン３とフレー
ムピン５によつてそれぞれ係止され、中間部が前
記弦受山８，９、針金押え１５、図示を省略した
駒等によつて支持される。そして、チユーニング
ピン３を回転調整することにより、弦２の張力が
変化し、所定の音高に調律される。なお、１６は
ピン板１３を位置決め固定するピン板受機であ
る。 As shown in Fig. 1, a piano frame 1 is used to hold a plurality of strings 2 stretched at a predetermined tension, and is generally formed into a frame-like shape from a casting such as cast iron. By this, tuning pin 3
A tuning pin installation part 4 into which the frame pin 5 is driven, a frame pin installation part 6 into which the frame pin 5 is driven, an opening 7 for weight reduction, string rests 8 and 9, reinforcing ribs 10, etc. . The tuning pin 3
is driven into the pilot hole 12 of the tuning pin installation part 4 through the bush 11, and its lower end is inserted and held in the insertion hole 14 of the pin plate 13 fixed to the back surface of the tuning pin installation part 4. has been done. Both ends of the string 2 are locked by the tuning pin 3 and the frame pin 5, and the middle part is supported by the string rests 8, 9, the wire presser 15, a bridge (not shown), etc. Ru. By rotating and adjusting the tuning pin 3, the tension of the string 2 is changed, and the pitch is tuned to a predetermined pitch. Note that 16 is a pin plate receiver for positioning and fixing the pin plate 13.
ところで、前記ピン板１３は前述した通りチユ
ーニングピン３を回転調整可能に保持する機能を
有するものであるため、通常複数枚の単板を積層
接着してなる一枚の合板によつて形成され、チユ
ーニングピン植設部４の全長に亘つて延在してい
る。しかし、このような木製のピン板１３は温
度、湿度等の環境変化によつて反つたり、捩れた
りしやすく、そのため雨期と乾期とでは第２図
ａ，ｂに鎖線で示す如く変形し、最大±４mm程度
の反りが生じる。この結果、フレーム１も反り、
弦２とアクシヨン機構およびダンパー機構（図示
せず）の相対的位置関係を狂わす。したがつて、
発音不良や止音不良の原因となり、ピアノの性能
を著しく低下させる。すなわち、弦とアクシヨン
機構の相対位置が変わると、ハンマーによる打撃
力が変るため、同じ力で鍵を操作しても演奏時期
により音量が変り、極端な場合、十分な音量が得
られなくなる。また、弦とダンパー機構との相対
位置が変ると、ダンパーの弦に対する押圧力が変
化し、弱まつた場合に十分な止音作用を果さなく
なる。 By the way, since the pin plate 13 has the function of holding the tuning pin 3 in a rotationally adjustable manner as described above, it is usually formed from a single piece of plywood made by laminating and bonding a plurality of veneers. , extends over the entire length of the tuning pin installation portion 4. However, such a wooden pin board 13 is easily warped or twisted due to environmental changes such as temperature and humidity, and as a result, it deforms during the rainy season and dry season as shown by the chain lines in Figure 2 a and b. Warpage of up to ±4 mm occurs. As a result, frame 1 is also warped,
The relative positional relationship between the string 2, the action mechanism, and the damper mechanism (not shown) is disturbed. Therefore,
This causes poor pronunciation and poor stopping, and significantly reduces the performance of the piano. That is, if the relative position between the string and the action mechanism changes, the striking force of the hammer changes, so even if the keys are operated with the same force, the volume will vary depending on the playing period, and in extreme cases, it will not be possible to obtain a sufficient volume. Further, if the relative position between the string and the damper mechanism changes, the pressing force of the damper against the string changes, and if it weakens, it will no longer provide a sufficient sound stopping effect.
この考案は上述したような点に鑑みてなされた
もので、ピン板を複数枚の分割ピン板で構成し、
これらをフレームのチユーニングピン植設部裏面
に固定すると共に、前記チユーニングピン植設部
に多数のチユーニングピンに共通する窓孔を設け
るという極めて簡単な構成により、全体としての
ピン板の反りを少なくし、ピアノの性能を安定に
保持し得るようにしたピアノのフレーム構造を提
供することにある。 This idea was made in view of the above points, and the pin plate is composed of multiple divided pin plates,
The extremely simple structure of fixing these to the back of the tuning pin installation part of the frame and providing a window hole common to a large number of tuning pins in the tuning pin installation part prevents warping of the pin plate as a whole. To provide a frame structure for a piano that can reduce the amount of noise and stably maintain the performance of the piano.
以下、この考案を図面に示す実施例に基づいて
詳細に説明する。 This invention will be described in detail below based on embodiments shown in the drawings.
第３図ａ，ｂ，ｃはこの考案に係るフレームの
一実施例を示す正面図、平面図、および−線
断面図、第４図は第３図ａ−線拡大断面図で
ある。なお、図中第１図と同一構成部材のものに
対しては同一符号を以つて示し、その説明を省略
するこれらの図において、フレーム１のチユーニ
ングピン植設部４は、２つのリブ１０，１０によ
つて３つのセクシヨンに仕切られると共にこれら
セクシヨン毎に窓孔２０，２１，２２がそれぞれ
多数のチユーニングピン３に共通するように弦２
の並設方向（第３図ａ左右方向）に沿つて形成さ
れている。 3a, b, and c are a front view, a plan view, and a cross-sectional view taken along the line ``--'', and FIG. 4 is an enlarged sectional view taken along the line ``--'' in FIG. 3, showing an embodiment of the frame according to this invention. In the drawings, the same components as those in FIG. , 10 into three sections, and each section has window holes 20, 21, 22 common to a large number of tuning pins 3.
are formed along the juxtaposed direction (left-right direction in FIG. 3a).
一方、前記チユーニングピン植設部４の裏面に
はピン板２５が強固に固着されている。このピン
板２５は前記各セクシヨン毎に分割されることに
より、３個の分割ピン板２５Ａ，２５Ｂ，２５Ｃ
によつて構成されている。これら３個の分割ピン
板２５Ａ，２５Ｂ，２５Ｃは第３図ｂに示すよう
に適宜な間隔をおいて弦２の並設方向に並設さ
れ、前記各窓孔２０，２１，２２のフレーム裏面
側開口端を塞いでいる。また、各分割ピン板２５
Ａ，２５Ｂ，２５Ｃの表面にはチユーニングピン
打込み用の挿通孔１４が複数個穿設されている。
したがつて、各弦２の一端を係止するチユーニン
グピン３は、各窓孔２０，２１，２２より分割ピ
ン板２５Ａ，２５Ｂ，２５Ｃの挿通孔１４にそれ
ぞれ打込まれる。 On the other hand, a pin plate 25 is firmly fixed to the back surface of the tuning pin installation part 4. This pin plate 25 is divided into three divided pin plates 25A, 25B, 25C for each section.
It is composed of. These three split pin plates 25A, 25B, and 25C are arranged in parallel in the direction in which the strings 2 are arranged at appropriate intervals as shown in FIG. It closes the side opening end. In addition, each split pin plate 25
A, 25B, and 25C have a plurality of insertion holes 14 drilled in their surfaces for driving the tuning pins.
Therefore, the tuning pin 3 that locks one end of each string 2 is driven into the insertion hole 14 of the split pin plate 25A, 25B, 25C through the window hole 20, 21, 22, respectively.
なお、前記チユーニングピン植設部４は第４図
に示すように垂直線に対してフレーム裏面側に適
宜角度傾斜して形成される。また、ピン板受機１
６は前記チユーニングピン植設部４の裏面に対し
て直交する如く設けられるため、その上面１６ａ
が図中左下りに適宜角度で傾斜し、この傾斜角度
が実質的にピン板受機１６の抜勾配としての役目
を果すと同時に各分割ピン板２５Ａ，２５Ｂ，２
５Ｃの下端面と前記上面１６ａとの面接触を可能
にしている。なお第３図ａ，ｃに示す符号２８は
フレームピン植設部６に沿つて配設された駒で、
この駒２８に各弦２の下端部が圧接されている。 As shown in FIG. 4, the tuning pin installation portion 4 is formed to be inclined at an appropriate angle toward the back side of the frame with respect to a vertical line. In addition, pin plate receiver 1
6 is provided perpendicularly to the back surface of the tuning pin installation portion 4, so that its upper surface 16a
is inclined downward to the left in the figure at an appropriate angle, and this inclination angle substantially serves as a draft of the pin plate receiver 16, and at the same time, each divided pin plate 25A, 25B, 2
This allows surface contact between the lower end surface of 5C and the upper surface 16a. Note that the reference numeral 28 shown in FIGS. 3a and 3c is a piece disposed along the frame pin installation part 6,
The lower end of each string 2 is pressed into contact with this bridge 28.
この考案によるフレーム１は上記のように構成
されているので、ピン板２５の反り、捩れ等によ
る影響が少なく、弦２とアクシヨン機構およびダ
ンパー機構（図示せず）との相対位置関係をほぼ
一定に保つことができる。すなわち、ピン板２５
をチユーニングピン植設部４の各セクシヨン毎に
分割すると共にこの分割された各分割ピン板２５
Ａ，２５Ｂ，２５Ｃのフレーム裏面と対接する面
の一部を窓孔２０，２１，２２により外気に常時
晒し、反対側の面とほぼ同じ環境下におくように
しているので、各分割ピン板２５Ａ，２５Ｂ，２
５Ｃの反りを雨期と乾期とで最大±1.0mm以内に
納めることが可能である。それ故、環境変化にか
かわらず、ピン板２５によるフレーム１の反りが
少なくピアノの性能を常時安定に保持し得る。 Since the frame 1 according to this invention is constructed as described above, there is little influence from warpage, twisting, etc. of the pin plate 25, and the relative positional relationship between the string 2 and the action mechanism and damper mechanism (not shown) is kept almost constant. can be kept. That is, the pin plate 25
is divided into each section of the tuning pin installation part 4, and each of the divided pin plates 25
Parts of the surfaces of A, 25B, and 25C that are in contact with the back of the frame are constantly exposed to the outside air through the window holes 20, 21, and 22, and are placed under almost the same environment as the opposite side, so each split pin plate 25A, 25B, 2
It is possible to keep the warpage of 5C within a maximum of ±1.0 mm during the rainy and dry seasons. Therefore, regardless of environmental changes, the frame 1 is less warped by the pin plate 25 and the performance of the piano can be maintained stably at all times.
なお、上記実施例はチユーニングピン植設部４
を裏面側に傾斜させ、フレーム１の弦張力による
反りを防止するようにした場合について説明した
が、この考案はこれに限らず第１図に示した従来
のフレーム、すなわちチユーニングピン植設部を
傾斜させないフレームにも適用実施し得ることは
勿論である。 In addition, in the above embodiment, the tuning pin installation part 4
Although we have described a case in which the frame 1 is tilted toward the back side to prevent warping due to the string tension of the frame 1, this invention is not limited to this, and is applicable to the conventional frame shown in FIG. Of course, the present invention can also be applied to a frame that does not tilt.
また、上記実施例は３個の窓孔２０，２１，２
２と３個の分割ピン板２５Ａ，２５Ｂ，２５Ｃを
用いたが、この数に何ら特定されるものではな
い。 Further, the above embodiment has three window holes 20, 21, 2.
Although two and three split pin plates 25A, 25B, and 25C were used, there is no particular limitation on this number.
以上説明したようにこの考案に係るピアノのフ
レーム構造は、フレームのチユーニングピン植設
部に多数のチユーニングピンに共通する窓孔を設
けると共に、ピン板を複数個の分割ピン板に分割
し、これらをチユーニングピン植設部の裏面に固
定し、チユーニングピンを前記窓孔から各分割ピ
ン板の挿通孔に打込むように構成したので、ピン
板自体の反り、捩れ等を減少防止し得る。そのた
め、フレームの反りも少なく、弦とアクシヨン機
構およびダンパー機構との相対位置関係をほぼ一
定に保つことができ、ピアノの性能を安定に維持
させることができる。また、分割ピン板を用いて
いるので、材料の歩留りが良く、材料費を低減さ
せるなど、その実用的効果は非常に大である。 As explained above, the frame structure of the piano according to this invention has a window hole common to a large number of tuning pins in the tuning pin installation part of the frame, and the pin plate is divided into a plurality of split pin plates. , these are fixed to the back side of the tuning pin installation part, and the tuning pin is driven into the insertion hole of each split pin plate from the window hole, so warping, twisting, etc. of the pin plate itself is prevented. It is possible. Therefore, there is little warpage of the frame, and the relative positional relationship between the strings, the action mechanism, and the damper mechanism can be maintained substantially constant, and the performance of the piano can be maintained stably. In addition, since the split pin plate is used, the material yield is high, and the practical effects are very large, such as reducing material costs.
第１図は従来のピアノ用フレームを示す一部破
断断面図、第２図ａ，ｂはピン板の反りを説明す
るための図、第３図ａ，ｂ，ｃはこの考案に係る
フレームの一実施例を示す正面図、平面図および
−線断面図、第４図は第３図ａ−線拡大
断面図である。
１……フレーム、２……弦、３……チユーニン
グピン、４……チユーニングピン植設部、１４…
…挿通孔、２０，２１，２２……窓孔、２５……
ピン板、２５Ａ，２５Ｂ，２５Ｃ……分割ピン
板。
Figure 1 is a partially cutaway sectional view showing a conventional piano frame, Figures 2a and b are diagrams for explaining the warpage of the pin plate, and Figures 3a, b, and c are views of the frame according to this invention. A front view, a plan view, and a sectional view taken along the line ``--'' showing one embodiment, and FIG. 4 is an enlarged sectional view taken along the line ``a'' in FIG. 3. 1... Frame, 2... String, 3... Tuning pin, 4... Tuning pin installation part, 14...
...Through hole, 20, 21, 22...Window hole, 25...
Pin plate, 25A, 25B, 25C...Divided pin plate.
Claims (1)
ユーニングピンに共通するように窓孔を形成し、
ピン板を複数個の分割ピン板で構成し、その夫々
の分割ピン板を前記チユーニングピン植設部の裏
面に固定して前記窓孔を塞ぎ、各分割ピン板にチ
ユーニングピン打込み用の挿通孔を形成し、前記
チユーニングピンを前記窓孔より前記挿通孔に打
込むようにしたことを特徴とするピアノのフレー
ム構造。 A window hole is formed in the tuning pin installation part of the frame so that it is common to many tuning pins,
The pin plate is composed of a plurality of split pin plates, each of which is fixed to the back side of the tuning pin installation part to close the window hole, and each split pin plate is provided with a hole for driving the tuning pin. A frame structure for a piano, characterized in that an insertion hole is formed, and the tuning pin is driven into the insertion hole through the window hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4532582U JPS58149781U (en) | 1982-03-30 | 1982-03-30 | Piano frame structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4532582U JPS58149781U (en) | 1982-03-30 | 1982-03-30 | Piano frame structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58149781U JPS58149781U (en) | 1983-10-07 |
| JPS6243346Y2 true JPS6243346Y2 (en) | 1987-11-10 |
Family
ID=30056347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4532582U Granted JPS58149781U (en) | 1982-03-30 | 1982-03-30 | Piano frame structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58149781U (en) |
-
1982
- 1982-03-30 JP JP4532582U patent/JPS58149781U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58149781U (en) | 1983-10-07 |
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