WO1997030437A1 - Dispositif de commande de l'ouverture/fermeture du couvercle d'un piano - Google Patents
Dispositif de commande de l'ouverture/fermeture du couvercle d'un piano Download PDFInfo
- Publication number
- WO1997030437A1 WO1997030437A1 PCT/JP1997/000374 JP9700374W WO9730437A1 WO 1997030437 A1 WO1997030437 A1 WO 1997030437A1 JP 9700374 W JP9700374 W JP 9700374W WO 9730437 A1 WO9730437 A1 WO 9730437A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- link mechanism
- opening
- keyboard
- control device
- closing control
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10C—PIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICAL INSTRUMENTS WITH ONE OR MORE KEYBOARDS
- G10C3/00—Details or accessories
- G10C3/02—Cases
Definitions
- the present invention particularly relates to a keyboard cover opening / closing control device for controlling opening / closing of a pivotable keyboard cover of an at-play piano or an at-type electronic piano.
- This type of keyboard cover is rotatably connected to the back roof via a hinge, and is opened and closed around the hinge.
- closing the keyboard cover it is pulled to the front and rotated to bring the lower surface of the front end of the keyboard cover into contact with the upper surface of the mouthpiece.
- the opening / closing control device for the keyboard lid is intended to solve such problems.
- One of them is a shock absorber composed of a one-piece torque hydraulic damper fixed to a brace or a shelf board, and a shock absorber and a keyboard. And a link mechanism connected between the lids. According to this configuration, when the keyboard cover rotates in the closing direction, the braking force of the shock absorber acts on the keyboard cover via the link mechanism, whereby the keyboard cover is loosely closed.
- the above-described conventional opening / closing control device has a problem that it is difficult to comply with the provisions of JISS 8507-1975 which specifies the attachment / detachment of the keyboard cover.
- the JIS specifies that the keyboard lid of an upright piano must be removable without using tools or the like.
- the shock absorber is fixed to a brace or shelf plate integral with the piano body, and further connected to the keyboard lid via a link mechanism. At the time of removal, the parts must be separated from each other at at least one point of connection between the parts from the fallboard to the shock absorber. For this reason, to meet the JIS regulations, the connecting parts to be separated must be easily attached regardless of the tools.
- An object of the present invention is to provide a keyboard cover that can be opened and closed stably and closed slowly, and that can be easily attached and detached without using tools or the like. It is to provide an opening and closing control device.
- the present invention provides an opening / closing control device for a keyboard lid of a piano having a main body, wherein the opening / closing control device is detachably attached to the main body of the piano, and the keyboard lid is attached rotatably.
- a link mechanism having one end and the other end, the one end being connected to the keyboard cover, and being attached to the back roof, and the other end of the link mechanism being connected.
- An opening / closing control device comprising: a shock absorber for braking the keyboard cover via the link mechanism when the keyboard cover rotates in a closing direction.
- the shock absorber brakes the lid through the link mechanism during rotation of the lid in the closing direction, so that the lid is decelerated, and the lid is decelerated. Make sure to close slowly.
- the shock absorber is attached to the back roof that is detachable from the piano body, the keyboard lid can be attached and detached together with the back roof, shock absorber, and link mechanism. Therefore, the lid can be easily attached and detached without using tools, etc., and the regulations of JISS 8507-1975 can be easily cleared, and the lid can be opened and closed stably without detachment etc. it can.
- the shock absorber is attached to a lower surface of the back roof, and the one end of the link mechanism is fixed to a lower surface of the keyboard cover.
- the one end of the link mechanism is housed and fixed in a concave portion formed on a side surface of the keyboard cover so as to be flush with the side surface.
- one end of the link mechanism is accommodated in the concave portion on the side surface of the keyboard cover, and is flush with the side surface, and cannot be seen from the front with the keyboard cover opened. Is further improved.
- the main body of the piano includes at least a pair of arms, and the back roof is detachably attached to the pair of arms.
- the pair of arms each have at least two protrusions extending inward
- the back roof has a back-roofed tree extending downward from a lower surface
- the back roof is The covered tree is removably attached to the crosspiece by being fitted between the at least two protrusions.
- the shock absorber comprises a one-way torque hydraulic damper.
- the link mechanism includes two link bars that are rotatably connected to each other, and one of the two link bars includes the one end of the link mechanism. The other includes the other end of the link mechanism.
- FIG. 1 is a side view showing an apparatus for controlling opening and closing of a keyboard lid of an Apple Piano according to a first embodiment of the present invention, with the keyboard lid open, together with the configuration around it.
- FIG. 2 is a side view similar to FIG. 1 with the fallboard cover closed.
- FIG. 3 is a partially enlarged side view showing the operation of the opening / closing control device.
- FIG. 4 is a side view showing a keyboard cover opening / closing control device according to a second embodiment of the present invention, together with a configuration around it.
- FIG. 5 is a partial front view corresponding to FIG.
- FIG. 6 is a perspective view showing the crosspiece and the back roof support together with the surrounding configuration.
- FIG. 1 shows a keyboard lid of an upright piano to which the present invention is applied, and its opening / closing control device.
- the keyboard cover 1 is made of plywood or the like, and has a horizontally-long rectangular planar shape and an inverted L-shaped cross-sectional shape.
- the lid (may be called the “key body”) 1 is attached to the front end of the back roof (may be called the “back of the lid”) 3 at the rear end via a hinge 2 so that it can rotate freely. It is opened and closed by pivoting about hinge 2 between an open position shown in FIG. 1 and a closed position shown in FIG.
- the back roof 3 is made of plywood or the like, and is configured to be detachable from the piano body including the arm 30 shown in FIG. More specifically, a tree with a back roof 5 is attached to the lower surface of the rear end of the back roof 3 so as to extend downward from each side of the lower surface.
- the back roof 3 is removably attached to the arm block 30 by fitting the back roofing wood 5 between the roof supports 6 (see FIG. 6) from above.
- Reference numeral 4 in the figure indicates an upper front plate detachably attached to the back roof 3, 7 is a shelf plate, 8 is a beater tree, 9 is a mouth stick attached to the front of the shelf plate 7, The fallboard 1 abuts on the pawl 9 in the closed position.
- the opening / closing control device 10 includes a shock absorber 11 for braking the rotation of the keyboard cover 1 toward the closed position, and a brake force for transmitting the braking force of the shock absorber 11 to the keyboard cover 1. And a link mechanism 12.
- the shock absorber 11 is constituted by a one-way torque type hydraulic damper having a cylindrical casing 13 filled with oil and a shaft part 14 rotatably fitted to the casing 13. The part of the one 13 is screwed to one side of the lower surface of the back roof 3 via the mounting member 15.
- the shock absorber 11 applies braking only when the shaft portion 14 rotates counterclockwise in FIG. 1 and does not perform braking when rotating in the opposite direction, that is, there is no load. It is configured as follows.
- the damping force of the shock absorber 11 is designed to gradually increase as the clockwise rotation angle of the shaft portion 14 increases.
- An arm 16 is provided on the shaft portion 14 so as to extend in the radial direction from the center thereof.
- the link mechanism 12 is composed of two link bars 12a and 12b rotatably connected to each other, and one link bar 12a is attached to the lower end of the back of the keyboard cover 1.
- the other link bar 12 b is rotatably connected to the arm 16 of the shaft portion 14.
- These link bars 1 2a, 1 2b A notch 17 is formed to allow the escape to prevent interference with the back roof 3.
- the solid line in FIG. 3 shows a state in which the cover 1 is in the closed position, as in FIG. In this closed position, the cover 1 is pivoted as far as possible in the clockwise direction, with its front part abutting against the pawl 9, covering the keyboard (not shown) and the clap 8. Further, the shaft portion 14 of the shock absorber 11 connected to the keyboard cover 1 via the link mechanism 12 is rotated at the maximum in the counterclockwise direction.
- the cover 1 When the cover 1 is tilted forward from this open position, the cover 1 rotates clockwise. At this time, the braking force of the shock absorber 11 acts on the keyboard 1 via the link mechanism 12, and the rotation of the keyboard 1 is decelerated and buffered by the braking force. In addition, the braking force of the shock absorber 5 gradually increases as the keyboard cover 1 approaches the closed position, so that the braking force is maximized at the end of closing the keyboard cover 1 in which the rotation speed tends to increase, and the keyboard cover 1 is securely held. It can be closed slowly.
- the shock absorber 11 is attached to the back roof 3 which is detachably attached to the piano body. It can be performed together with the shock absorber 11 and the link mechanism 12. Therefore, the lid 1 can be easily attached and detached without using tools, etc., and the regulations of JISS 8507-1975 can be easily cleared, and the lid 1 can be opened and closed stably without detachment. Can be. Furthermore, with the cover 1 open, most of the shock absorber 1 1 and link mechanism 1 2 are hidden under the back roof 3, and a part of the link mechanism 1 2 is slightly visible at the bottom of the cover 1 Because it is only the appearance of the piano is good.
- This opening / closing control device 20 differs from the opening / closing control device 10 of the first embodiment mainly in the structure for attaching the link mechanism to the keyboard cover 1. That is, in the opening / closing control device 10, the link bar 12 a on the keyboard lid 1 side of the link mechanism 12 is screwed to the lower end of the rear surface of the keyboard lid 1, whereas in the opening / closing control device 20, A concave portion 21 is formed on the outer surface of the keyboard cover 1, and a link bar 22 a on the keyboard cover 1 side of the link mechanism 22 is attached to the concave portion 21.
- the recess 21 extends along the side of the fallboard 1 to the back thereof, and has a width and depth corresponding to the link bar 22a, so that the link bar 22 is formed in the recess 21. It is housed flush with the outer surface of the keyboard cover 1. In this state, the link bar 22 a is fixed to the outer surface of the keyboard cover 1 with the screw 23.
- the link bar 22a is configured to be longer than the link bar 12a of the first embodiment. This is because, when the link bar 22a is attached to the side of the cover 1, the braking force from the shock absorber 1 1 is applied to the joint between the link bar 22a and the cover 1 (ie, screw 23). This is because the link bar 22a is firmly fixed so that it can sufficiently resist this shear force.
- the shaft portion 14 and the arm 16 of the shock absorber 11 are integrally formed in advance. Other configurations are the same as in the first embodiment.
- the operation of the opening / closing control device 20 is exactly the same as that of the opening / closing control device 10 of the above-described first embodiment, and therefore, as in the case of the first embodiment, the keyboard cover 1 Can be opened and closed stably, and can be closed loosely, and the keyboard cover 1 can be easily attached and detached without using tools or the like.
- the link bar 2 2 a of the link mechanism 22 is housed in the recess 21 on the outer surface of the keyboard cover 1, and is flush with the outer surface, so that the keyboard cover 1 is invisible when viewed from the front. Therefore, the appearance of the piano can be further improved.
- a one-way torque type hydraulic damper is used as the shock absorber 11; however, another suitable shock absorber can be used.
- the embodiment is an example in which the present invention is applied to a keyboard lid of an upright piano, it is a matter of course that the present invention may be applied to a keyboard lid of an upright electronic piano.
- the keyboard lid of an upright viano and an athletic-type electronic piano can be opened and closed stably, it can be closed loosely, and the attachment / detachment of the keyboard lid can be performed by using a tool. This can be done easily without using any other means.
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/930,387 US5918296A (en) | 1996-02-16 | 1997-02-13 | Closing control device for fallboard |
DE19780212T DE19780212B4 (de) | 1996-02-16 | 1997-02-13 | Schließsteuervorrichtung für Klaviaturabdeckung |
KR1019970706615A KR100497337B1 (ko) | 1996-02-16 | 1997-02-13 | 건반덮개의 개폐제어장치 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5426896 | 1996-02-16 | ||
JP8/54268 | 1996-02-16 | ||
JP14860196A JP3256438B2 (ja) | 1996-02-16 | 1996-05-20 | 鍵盤蓋の開閉制御装置 |
JP8/148601 | 1996-05-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997030437A1 true WO1997030437A1 (fr) | 1997-08-21 |
Family
ID=26395014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1997/000374 WO1997030437A1 (fr) | 1996-02-16 | 1997-02-13 | Dispositif de commande de l'ouverture/fermeture du couvercle d'un piano |
Country Status (8)
Country | Link |
---|---|
US (1) | US5918296A (ja) |
JP (1) | JP3256438B2 (ja) |
KR (1) | KR100497337B1 (ja) |
CN (1) | CN1134758C (ja) |
DE (1) | DE19780212B4 (ja) |
ID (1) | ID17329A (ja) |
TW (1) | TW337014B (ja) |
WO (1) | WO1997030437A1 (ja) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6686521B2 (en) * | 2001-03-30 | 2004-02-03 | Yamaha Corporation | Keyboard instrument |
JP4915743B2 (ja) * | 2007-11-07 | 2012-04-11 | 株式会社コルグ | ピアノの消音装置、消音装置付きピアノ |
US8476511B1 (en) * | 2012-01-19 | 2013-07-02 | Marlene Stenuf | Device and method to secure a piano fallboard |
US9076410B2 (en) * | 2013-09-19 | 2015-07-07 | Kabushiki Kaisha Kawai Gakki Seisakusho | Fallboard arrangement for keyboard instrument and opening and closing device for fallboard |
JP6084141B2 (ja) * | 2013-09-19 | 2017-02-22 | 株式会社河合楽器製作所 | 鍵盤蓋の開閉装置 |
JP6384117B2 (ja) * | 2014-05-09 | 2018-09-05 | ヤマハ株式会社 | 鍵盤楽器の鍵盤蓋の軸支構造 |
CN107301854A (zh) * | 2017-06-29 | 2017-10-27 | 温州职业技术学院 | 钢琴盖缓降装置的钢琴 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5481717U (ja) * | 1977-11-16 | 1979-06-09 | ||
JPS563748Y2 (ja) * | 1975-06-24 | 1981-01-27 | ||
JPS57150891U (ja) * | 1981-03-18 | 1982-09-21 | ||
JPH05313653A (ja) * | 1992-05-07 | 1993-11-26 | Yamaha Corp | 鍵盤楽器の蓋体構造 |
JPH0548238Y2 (ja) * | 1989-06-13 | 1993-12-21 | ||
JPH0617188Y2 (ja) * | 1989-06-14 | 1994-05-02 | ヤマハ株式会社 | 鍵盤楽器の鍵盤蓋 |
JPH08109940A (ja) * | 1994-08-19 | 1996-04-30 | Totsuku Bearing Kk | 回転ダンパおよび該ダンパを用いた蓋等の開閉装置 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5157386A (en) * | 1987-06-04 | 1992-10-20 | Seiko Epson Corporation | Circuit for driving a liquid crystal display panel |
US5175386A (en) * | 1990-03-20 | 1992-12-29 | Yamaha Corporation | Keyboard instrument with keyboard cover mechanism |
-
1996
- 1996-05-20 JP JP14860196A patent/JP3256438B2/ja not_active Expired - Lifetime
-
1997
- 1997-02-13 US US08/930,387 patent/US5918296A/en not_active Expired - Lifetime
- 1997-02-13 DE DE19780212T patent/DE19780212B4/de not_active Expired - Lifetime
- 1997-02-13 KR KR1019970706615A patent/KR100497337B1/ko not_active IP Right Cessation
- 1997-02-13 WO PCT/JP1997/000374 patent/WO1997030437A1/ja not_active Application Discontinuation
- 1997-02-13 CN CNB97190085XA patent/CN1134758C/zh not_active Expired - Lifetime
- 1997-02-15 TW TW086101801A patent/TW337014B/zh not_active IP Right Cessation
- 1997-02-17 ID IDP970459A patent/ID17329A/id unknown
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS563748Y2 (ja) * | 1975-06-24 | 1981-01-27 | ||
JPS5481717U (ja) * | 1977-11-16 | 1979-06-09 | ||
JPS57150891U (ja) * | 1981-03-18 | 1982-09-21 | ||
JPH0548238Y2 (ja) * | 1989-06-13 | 1993-12-21 | ||
JPH0617188Y2 (ja) * | 1989-06-14 | 1994-05-02 | ヤマハ株式会社 | 鍵盤楽器の鍵盤蓋 |
JPH05313653A (ja) * | 1992-05-07 | 1993-11-26 | Yamaha Corp | 鍵盤楽器の蓋体構造 |
JPH08109940A (ja) * | 1994-08-19 | 1996-04-30 | Totsuku Bearing Kk | 回転ダンパおよび該ダンパを用いた蓋等の開閉装置 |
Also Published As
Publication number | Publication date |
---|---|
JP3256438B2 (ja) | 2002-02-12 |
KR100497337B1 (ko) | 2005-10-12 |
CN1134758C (zh) | 2004-01-14 |
JPH09281957A (ja) | 1997-10-31 |
DE19780212B4 (de) | 2006-03-23 |
DE19780212T1 (de) | 1998-05-07 |
US5918296A (en) | 1999-06-29 |
ID17329A (id) | 1997-12-18 |
TW337014B (en) | 1998-07-21 |
CN1180442A (zh) | 1998-04-29 |
KR19980703396A (ko) | 1998-11-05 |
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