JP2000194355A - Structure for fitting topboard for grand piano - Google Patents
Structure for fitting topboard for grand pianoInfo
- Publication number
- JP2000194355A JP2000194355A JP10370929A JP37092998A JP2000194355A JP 2000194355 A JP2000194355 A JP 2000194355A JP 10370929 A JP10370929 A JP 10370929A JP 37092998 A JP37092998 A JP 37092998A JP 2000194355 A JP2000194355 A JP 2000194355A
- Authority
- JP
- Japan
- Prior art keywords
- large roof
- topboard
- grand piano
- roof
- side plate
- 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.)
- Withdrawn
Links
Landscapes
- Closing And Opening Devices For Wings, And Checks For Wings (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、グランドピアノの
大屋根取付構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roof mounting structure for a grand piano.
【０００２】[0002]
【従来の技術】グランドピアノの大屋根は、一般的に
は、側板に蝶番を介して開閉可能に取り付けられてい
る。また、グランドピアノには大屋根突揚棒が備えられ
ており、大屋根突揚棒の先端を大屋根の裏面に取り付け
た突揚棒受の凹部に突き当てることで大屋根を開状態で
支えられるようになっている。大屋根を開状態にするに
は、まず大屋根の蝶番の反対側を持ち上げて大屋根を開
き、開いた大屋根を支えながら大屋根突揚棒を取り上げ
て、大屋根突揚棒の先端を突揚棒受の凹部に突き当て
る。一方、大屋根を閉じる場合は、大屋根を少し開方向
に回動させて大屋根突揚棒の先端を突揚棒受の凹部から
外し、大屋根突揚棒を所定の場所に収納した後、大屋根
を閉じる。2. Description of the Related Art Generally, a large roof of a grand piano is attached to a side plate via a hinge so as to be openable and closable. In addition, the grand piano is equipped with a large roof lifting rod, and the large roof is supported in an open state by abutting the tip of the large roof lifting rod against the concave part of the lifting rod receiver attached to the back of the large roof. It is supposed to be. To open the large roof, first lift the opposite side of the large roof from the hinge, open the large roof, lift the large roof uplift bar while supporting the open large roof, and remove the tip of the large roof uplift bar. It hits the concave part of the lifting rod receiver. On the other hand, when closing the large roof, rotate the large roof slightly in the opening direction to remove the tip of the large roof lifting rod from the concave portion of the lifting rod receiver, and then store the large roof lifting rod in a predetermined place. , Close the big roof.
【０００３】ところで、グランドピアノの大屋根は重量
物である（特にフルコンサートピアノの大屋根は５０ｋ
ｇ以上である）ので、大屋根を持ち上げて開くには相当
大きな力が必要である。また、１人で開閉する場合は大
屋根突揚棒を突揚棒受の凹部に突き当てるときや大屋根
突揚棒の先端を凹部から外すときに大屋根を片手で支え
なければならず、この場合にも相当大きな力が必要であ
る。従って、腕力が小さい女性が１人で大屋根を開閉す
ることは困難な場合がある。The large roof of a grand piano is heavy (particularly, the full roof of a full concert piano is 50k).
g or more), and a considerable force is required to lift and open the large roof. In addition, when opening and closing by one person, the large roof must be supported with one hand when the large roof lifting rod is hit against the concave part of the lifting rod receiver or when the tip of the large roof lifting rod is removed from the concave part, Even in this case, a considerable force is required. Therefore, it may be difficult for a woman with low strength to open and close the large roof alone.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、このような
問題点に鑑み、人手によるグランドピアノの大屋根の開
閉が容易な大屋根取付構造を提供することを課題とす
る。SUMMARY OF THE INVENTION In view of the foregoing problems, an object of the present invention is to provide a large-roof mounting structure that allows a grand piano to easily open and close a large roof.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決するため
の本発明は、グランドピアノの側板に開閉可能に枢支さ
れた大屋根の取付構造において、大屋根を開方向に付勢
する付勢手段を設け、付勢手段の付勢力を大屋根が自重
で閉状態に維持される大きさに設定したことを特徴とす
る。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a biasing mechanism for biasing a large roof in an opening direction in a mounting structure of a large roof pivotally supported on a side plate of a grand piano so as to be opened and closed. Means is provided, and the biasing force of the biasing means is set to a size such that the large roof is kept closed by its own weight.
【０００６】このような構成にすれば、人手によって大
屋根を開くために閉じられた大屋根を持ち上げたり支え
たりするときに、付勢手段の開方向の付勢力を、これら
の作業で必要な力の一部として利用できるので、開閉作
業者の負担が軽減され、大屋根の開閉作業が容易にな
る。また大屋根は自重で閉状態に維持されるので、従来
通りの取扱いで大屋根を開閉できる。According to this structure, when the closed large roof is lifted or supported by a human to open the large roof, the urging force of the urging means in the opening direction is required for these operations. Since it can be used as part of the force, the burden on the opening and closing operator is reduced, and the opening and closing work of the large roof is facilitated. Also, since the large roof is kept closed by its own weight, the large roof can be opened and closed by the conventional handling.
【０００７】前記大屋根が前記側板に蝶番を介して開閉
可能に枢支されるものでは、前記付勢手段として１巻き
以上の巻き線部と巻き線の両端のアーム部とを備えるコ
イル形のトーションばねを用い、前記巻き線部を蝶番の
回転軸に外挿し、前記アーム部で大屋根を開方向に付勢
すれば、付勢手段が目立たないので大屋根を開いた状態
でのグランドピアノの見栄えが損なわれない。When the large roof is pivotally supported on the side plate via a hinge so as to be openable and closable, a coil-type coil having at least one winding part and arm parts at both ends of the winding as the urging means is provided. If a torsion spring is used to extrapolate the winding portion to the hinge rotation axis and urge the large roof in the opening direction with the arm portion, the biasing means is inconspicuous, so that the grand piano with the large roof opened is not visible. Appearance is not impaired.
【０００８】[0008]
【発明の実施の形態】図１から図３を参照して、１はグ
ランドピアノの側板であり、当該側板１には側板１の開
口を覆う大屋根２が２つの蝶番３を介して開閉可能に取
り付けられている。大屋根２の裏面には凹部を備える突
揚棒受２ａが取り付けられており、グランドピアノに備
わる大屋根突揚棒４の先端を突揚棒受２ａの凹部に突き
当てると、大屋根２が開位置で支えられる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 to 3, reference numeral 1 denotes a side plate of a grand piano. A large roof 2 covering an opening of the side plate 1 can be opened and closed via two hinges 3 on the side plate 1. Attached to. A raised bar receiver 2a having a concave portion is attached to the back surface of the large roof 2, and when the tip of the large roof raised bar 4 provided on the grand piano is abutted against the concave portion of the raised rod receiver 2a, the large roof 2 is formed. Supported in the open position.
【０００９】蝶番３は、大屋根２にねじＮで固定される
平板状の第１回動片３１と、側板１にねじＮで固定され
る断面形状が逆Ｌ形の第２回動片３２と、両回動片３
１，３２を回動可能に連結するヒンジピン（回転軸）３
３とを備える角蝶番である。第１回動片３１及び第２回
動片３２の連結側の端部には、複数の筒部３１ａ，３２
ａが間隔をあけて曲げ加工により形成されており、各回
動片３１，３２の筒部３１ａ，３２ａが同軸上に交互に
並ぶ状態で、筒部３１ａ，３２ａにヒンジピン３３が挿
通されている。The hinge 3 is composed of a first rotating piece 31 of a flat plate shape fixed to the large roof 2 with a screw N, and a second rotating piece 32 of an inverted L-shaped cross section fixed to the side plate 1 with a screw N. And both rotating pieces 3
Hinge pin (rotating shaft) 3 for rotatably connecting 1, 32
3 is a corner hinge having A plurality of cylindrical portions 31a, 32 are provided at the connection side ends of the first rotating piece 31 and the second rotating piece 32.
The hinge pin 33 is inserted through the cylindrical portions 31a and 32a in a state where the cylindrical portions 31a and 32a of the rotating pieces 31 and 32 are arranged coaxially and alternately.
【００１０】ヒンジピン３３には、２つのコイル形のト
ーションばね（付勢手段）５が組み込まれている。当該
トーションばね（以下、単に「ばね」とする）５は、図
３に示すように、ヒンジピン３３に外挿される１巻きの
巻き線部５ａと、巻き線部５ａの一端から延びる第１ア
ーム部５ｂと、巻き線部５ａの他端から延びる屈曲した
第２アーム部５ｃとから構成されており、筒部３１ａ，
３２ａの間に配置されている。第１アーム部５ｂは第１
回動片３１の下面に当接しており、第２アーム部５ｃは
第２回動片３２と側板１との間に挟まれている。巻き線
部５ａは弾発力を備えており、大屋根２は当該弾発力を
アーム部５ｂ，５ｃから受けて開方向に付勢される。ば
ね５の付勢力は、２つのばね５で大屋根２を開方向に付
勢しても、大屋根２が自重で閉状態に維持される大きさ
に設定されている。従って、大屋根２の開閉についての
取扱いは従来通りである。The hinge pin 33 incorporates two coil-shaped torsion springs (biasing means) 5. As shown in FIG. 3, the torsion spring (hereinafter, simply referred to as “spring”) 5 includes a single-turn winding portion 5 a externally inserted into the hinge pin 33 and a first arm portion extending from one end of the winding portion 5 a. 5b and a bent second arm portion 5c extending from the other end of the winding portion 5a.
32a. The first arm 5b is the first
The second arm 5 c is in contact with the lower surface of the rotating piece 31 and is sandwiched between the second rotating piece 32 and the side plate 1. The winding portion 5a has a resilient force, and the large roof 2 receives the resilient force from the arm portions 5b and 5c and is urged in the opening direction. The biasing force of the springs 5 is set to a size that allows the large roof 2 to be kept closed by its own weight even when the large roof 2 is biased in the opening direction by the two springs 5. Therefore, the handling of opening and closing the large roof 2 is the same as in the past.
【００１１】大屋根２を人手によって開く場合は、まず
大屋根２の蝶番３とは反対側を手で持ち上げて大屋根２
を開き、開いた大屋根２を支えながらグランドピアノに
備わる大屋根突揚棒４を取り上げ、大屋根突揚棒４の先
端を突揚棒受２ａの凹部に突き当てて大屋根２を開位置
で支える。大屋根２はばね５によって開方向に付勢され
ており、ばね５の付勢力を大屋根２を持ち上げたり支え
たりするのに必要な力の一部として利用できる。従っ
て、開閉作業者の負担が軽減され、大屋根の開閉作業が
容易になる。一方、大屋根２を閉じる場合は、まず大屋
根２を少し開方向に回動させて大屋根突揚棒４の先端を
突揚棒受２ａの凹部から外して、大屋根２を支えつつ大
屋根突揚棒４を所定の場所に収納した後、大屋根２を閉
じる。閉じる場合にも大屋根２を開方向に回動させたり
支えたりするが、このときもばね５の開方向の付勢力を
必要な力の一部として利用できるので、開く作業と同様
に閉じる作業も容易である。When the large roof 2 is manually opened, first, the opposite side of the large roof 2 from the hinge 3 is lifted by hand and the large roof 2 is opened.
And lift the large roof raising bar 4 provided on the grand piano while supporting the open large roof 2, and abut the tip of the large roof raising rod 4 against the concave portion of the lifting rod receiver 2 a to open the large roof 2. Support with. The large roof 2 is urged in the opening direction by a spring 5, and the urging force of the spring 5 can be used as a part of the force required to lift and support the large roof 2. Therefore, the burden on the opening / closing operator is reduced, and the opening / closing operation of the large roof is facilitated. On the other hand, when closing the large roof 2, first, the large roof 2 is slightly rotated in the opening direction to remove the tip of the large roof lifting rod 4 from the recess of the lifting rod receiver 2 a, and the large roof 2 is supported while supporting the large roof 2. After the roof lifting bar 4 is stored in a predetermined place, the large roof 2 is closed. When the roof is closed, the large roof 2 is rotated or supported in the opening direction. At this time, the urging force of the spring 5 in the opening direction can be used as a part of the necessary force. Is also easy.
【００１２】大屋根２を１人で開閉する場合は、１人で
大屋根２を持ち上げなければならず、しかも大屋根突揚
棒４の取り上げや収納の際は片手で大屋根２を支えなけ
ればならないが、大屋根２を開方向に付勢するばね５の
付勢力を利用できれば、これらの作業時に必要な力が軽
減されて１人での開閉作業も容易になり、腕力の小さい
女性が１人で大屋根２を開閉できるようになる。また、
付勢手段としてのコイル形のトーションばね５を蝶番３
に組み込めば、付勢手段が目立たないので大屋根２を開
いた状態でのグランドピアノの見栄えが損なわれない。When the large roof 2 is opened and closed by one person, the large roof 2 must be lifted by one person, and the large roof 2 must be supported with one hand when picking up and storing the large roof lifting rod 4. However, if the urging force of the spring 5 that urges the large roof 2 in the opening direction can be used, the force required for these operations is reduced, so that the opening and closing work can be easily performed by one person. The large roof 2 can be opened and closed by one person. Also,
The coil type torsion spring 5 as the urging means is connected to the hinge 3
The appearance of the grand piano with the large roof 2 open is not impaired because the biasing means is not conspicuous.
【００１３】ところで、付勢手段は上記ばね５だけに限
られるものではなく、例えば図４に示すように、両端が
側板１と大屋根２とに支承されるエアダンパ６を用いて
も良い。エアダンパ６は、側板１にヒンジＨによって回
動可能に支承されるシリンダ６１と、一端がシリンダ６
１内に挿入され他端が大屋根２にヒンジＨによって回動
可能に支承されるロッド６２とを備える。シリンダ６１
内にはコイルばね６３が収容されており、コイルばね６
３の弾発力でロッド６２を押す。この弾発力で大屋根２
が開方向に付勢される。またロッド６２の先端にはシリ
ンダ６１の内面に沿って摺動自在な仕切り板６４が取り
付けられている。仕切り板６４には図示しないオリフィ
スが形成されており、エアダンパ６の伸縮が緩やかに行
われる。このようなエアダンパ６を付勢手段として用い
れば、開閉途中で手を離したとしても大屋根２が閉方向
に急に回動することがなく、より開閉しやすい。By the way, the biasing means is not limited to the above-mentioned spring 5, but may be an air damper 6 whose both ends are supported by the side plate 1 and the large roof 2, as shown in FIG. The air damper 6 includes a cylinder 61 rotatably supported on the side plate 1 by a hinge H, and a cylinder 6 at one end.
1 and a rod 62 whose other end is rotatably supported by the hinge H on the large roof 2. Cylinder 61
A coil spring 63 is housed inside the coil spring 6.
The rod 62 is pushed with the resilience of 3. With this elasticity, large roof 2
Are biased in the opening direction. Further, a partition plate 64 slidable along the inner surface of the cylinder 61 is attached to the tip of the rod 62. An orifice (not shown) is formed in the partition plate 64, and the expansion and contraction of the air damper 6 is performed gently. If such an air damper 6 is used as the urging means, the large roof 2 does not suddenly rotate in the closing direction even if the hand is released during opening / closing, and is more easily opened / closed.
【００１４】[0014]
【発明の効果】以上のように、本発明によれば、グラン
ドピアノの大屋根を人手によって容易に開閉することが
できる。As described above, according to the present invention, the large roof of a grand piano can be easily opened and closed by hand.
【図１】 本発明のグランドピアノの大屋根取付構造が
適用されたグランドピアノであり、大屋根が開位置にあ
る状態を示す斜視図FIG. 1 is a perspective view of a grand piano to which a roof mounting structure for a grand piano according to the present invention is applied, showing a state where the roof is in an open position.
【図２】 本発明のグランドピアノの大屋根取付構造の
要部を示す斜視図FIG. 2 is a perspective view showing a main part of a large roof mounting structure of the grand piano of the present invention.
【図３】 図２のＩＩＩ−ＩＩＩ面を示す断面図FIG. 3 is a cross-sectional view showing the III-III plane of FIG. 2;
【図４】 本発明の他の実施の形態のグランドピアノの
大屋根取付構造を示す斜視図FIG. 4 is a perspective view showing a large roof mounting structure of a grand piano according to another embodiment of the present invention.
１ 側板 ２ 大屋根 ３ 蝶番 ３３ ヒンジピン（回転軸） ５ コイル形のトーションばね（付勢手段） ６ エアダンパ（付勢手段） DESCRIPTION OF SYMBOLS 1 Side plate 2 Large roof 3 Hinge 33 Hinge pin (rotating shaft) 5 Coil type torsion spring (biasing means) 6 Air damper (biasing means)
Claims (2)
された大屋根の取付構造において、大屋根を開方向に付
勢する付勢手段を設け、付勢手段の付勢力を大屋根が自
重で閉状態に維持される大きさに設定したことを特徴と
するグランドピアノの大屋根取付構造。In a mounting structure of a large roof pivotally supported on a side plate of a grand piano so as to be openable and closable, an urging means for urging the large roof in an opening direction is provided, and the urging force of the urging means is controlled by its own weight. A large roof mounting structure for a grand piano, characterized in that it is set to a size that can be maintained in a closed state.
閉可能に枢支されており、前記付勢手段は１巻き以上の
巻き線部と巻き線の両端のアーム部とを備えるコイル形
のトーションばねであり、前記巻き線部を蝶番の回転軸
に外挿し、前記アーム部で大屋根を開方向に付勢するこ
とを特徴とする請求項１に記載のグランドピアノの大屋
根取付構造。2. A coil type wherein said large roof is pivotally supported on said side plate via a hinge so as to be openable and closable, and said urging means includes one or more winding portions and arm portions at both ends of the winding. 2. The large roof mounting structure for a grand piano according to claim 1, wherein the winding portion is extrapolated to a rotation shaft of a hinge, and the large roof is urged in the opening direction by the arm portion. 3. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10370929A JP2000194355A (en) | 1998-12-25 | 1998-12-25 | Structure for fitting topboard for grand piano |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10370929A JP2000194355A (en) | 1998-12-25 | 1998-12-25 | Structure for fitting topboard for grand piano |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000194355A true JP2000194355A (en) | 2000-07-14 |
Family
ID=18497841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10370929A Withdrawn JP2000194355A (en) | 1998-12-25 | 1998-12-25 | Structure for fitting topboard for grand piano |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000194355A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030037152A (en) * | 2001-11-02 | 2003-05-12 | 한국항공우주산업 주식회사 | Door structure for an aircraft |
| JP2010266609A (en) * | 2009-05-13 | 2010-11-25 | Roland Corp | Keyboard instrument |
-
1998
- 1998-12-25 JP JP10370929A patent/JP2000194355A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030037152A (en) * | 2001-11-02 | 2003-05-12 | 한국항공우주산업 주식회사 | Door structure for an aircraft |
| JP2010266609A (en) * | 2009-05-13 | 2010-11-25 | Roland Corp | Keyboard instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20060307 |