WO2014024261A1 - アップライトピアノの弱音システム、グランドピアノの弱音システム、及び支持装置 - Google Patents
アップライトピアノの弱音システム、グランドピアノの弱音システム、及び支持装置 Download PDFInfo
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- WO2014024261A1 WO2014024261A1 PCT/JP2012/070105 JP2012070105W WO2014024261A1 WO 2014024261 A1 WO2014024261 A1 WO 2014024261A1 JP 2012070105 W JP2012070105 W JP 2012070105W WO 2014024261 A1 WO2014024261 A1 WO 2014024261A1
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- performance mode
- string
- rail
- belt
- hammer
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- 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
- G10C3/16—Actions
- G10C3/24—Repetition [tremolo] mechanisms
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- 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
- G10C3/16—Actions
- G10C3/161—Actions specially adapted for upright pianos
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- 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
- G10C3/16—Actions
- G10C3/166—Actions for damping the strings
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- 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
- G10C3/16—Actions
- G10C3/18—Hammers
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- 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
- G10C3/16—Actions
- G10C3/22—Actions specially adapted for grand pianos
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- 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
- G10C3/26—Pedals or pedal mechanisms; Manually operated sound modification means
Definitions
- the present invention relates to a weak sound system for an upright piano, a weak sound system for a grand piano, and a support device.
- a buffer member provided on a muffler rail is interposed between a hammer head and a string and the string is hit by the hammer head via the buffer member when playing a weak sound.
- the volume at the time of stringing is reduced.
- the regulating button is moved downward so that the distance between the regulating button and the jack is There is a technology to shorten the distance.
- the buffer member is not positioned between the hammer head and the string, the distance between the string and the hammer head when the jack escapes is widened, which impairs the touch feeling of the keyboard.
- the present invention has been made in view of the circumstances as described above, and an upright piano weak sound system and a grand piano weak sound that can reduce the volume of the piano with an easy configuration without impairing the touch feeling of the keyboard. It is an object to provide a system and a supporting device.
- a weak sound system for an upright piano comprises: The upright piano can be switched between a normal performance mode in which a hammer directly strikes a string and a weak sound performance mode in which the hammer strikes through a buffer member.
- the upright piano includes a weak sound device and a let-off switching device.
- the weak sound device is When the hammer strikes the string in the weak sound performance mode, a first buffer member position interposed between the hammer and the string, and when the hammer strikes the string in the normal performance mode A buffer member movable between a second buffer member position not interposed between the hammer and the string; A rail that supports the buffer member and is movable with the buffer member; A drive unit that drives the rail so that the buffer member moves between the first buffer member position and the second buffer member position;
- the let-off switching device is In the weak sound performance mode, a first belt-like member position located across the regulating buttons and jacks of a plurality of action mechanisms provided on the piano, and a plurality of positions provided on the piano in the normal performance mode A second belt-like member position not located between the regulating button of the action mechanism and the jack, and a belt-like member movable between, It comprises at least one pair of support members that support both ends of the strip member in the parallel direction of the plurality of action mechanisms and are movable together with
- a connecting member for connecting the rail and the set of support members may be further provided so that the rail and the set of support members are interlocked.
- a grand piano weak sound system comprises: It is possible to switch between a normal performance mode in which a hammer directly strikes a string and a weak sound performance mode in which the hammer strikes through a buffer member, and a weak sound of a grand piano composed of a weak sound device and a let-off switching device.
- the weak sound device is When the hammer strikes the string in the weak sound performance mode, a first buffer member position interposed between the hammer and the string, and when the hammer strikes the string in the normal performance mode A buffer member movable between a second buffer member position not interposed between the hammer and the string; A rail that supports the buffer member and is movable with the buffer member; A drive unit that drives the rail so that the buffer member moves between the first buffer member position and the second buffer member position;
- the let-off switching device is In the weak sound performance mode, a first band member position located between the regulating buttons and jacks of the plurality of action mechanisms provided on the piano, and in the normal performance mode, the regulation of the plurality of action mechanisms.
- a first strip member that is movable between a second strip member position that is not located between the rating button and the jack; In the weak sound performance mode, a third belt-like member position located between the drop screws and repetition levers of the plurality of action mechanisms; and in the normal performance mode, drop screws and repetitions of the plurality of action mechanisms.
- a fourth belt-like member position that is not located between the lever and a second belt-like member that is movable between, At least one pair of first support members that support both ends of the first belt-like member in the parallel direction of the plurality of action mechanisms and are movable together with the first belt-like member; It comprises at least one pair of second support members that support both ends of the second belt-like member in the parallel direction of the plurality of action mechanisms and are movable together with the second belt-like member.
- the rail, the first set of first support members, and the first set of second support members so that the rail, the first set of first support members, and the first set of second support members are interlocked. You may further provide the connection part which connects.
- the weak sound device and the let-off switching device may be fixed to a bracket that supports the plurality of action mechanisms.
- a support device includes: A support device used in a piano that can be switched between a normal performance mode in which a hammer directly strikes a string and a weak sound performance mode in which the hammer strikes through a buffer member; Along with the other support device, a support portion that supports both ends of a belt-like member extending substantially parallel to a parallel direction of a plurality of action mechanisms provided on the piano, A rotation unit that rotates with the support unit about a rotation axis that is substantially parallel to a parallel direction of the plurality of action mechanisms,
- the band-shaped member includes a first band-shaped member position located between a regulating button and a jack of a plurality of action mechanisms provided on the piano in the weak sound performance mode, and the piano in the normal performance mode.
- a second belt-like member position that is not located between the regulating buttons and the jacks of the plurality of action mechanisms provided in the It is characterized by that.
- a support device includes: A support device used for a grand piano that can be switched between a normal performance mode in which a hammer directly strikes a string and a weak sound performance mode in which the hammer strikes through a buffer member; Along with the other support devices, a support portion that supports both ends of a belt-like member extending substantially parallel to the parallel direction of a plurality of action mechanisms provided on the grand piano, A rotation unit that rotates the support unit about a rotation axis that is substantially parallel to a parallel direction of the plurality of action mechanisms, In the weak performance mode, the band-shaped member is positioned between a drop screw and a repetition lever of the plurality of action mechanisms, and in the normal performance mode, the plurality of action mechanisms. Move between the drop screw and the repetition lever and the second belt-like member position that is not located between the drop screw and the repetition lever; It is characterized by that.
- the volume of the piano can be reduced with an easy configuration without impairing the touch feeling of the keyboard.
- FIG. 1 is a perspective view of a main part of a sound attenuation device according to Embodiment 1.
- FIG. It is a figure showing the positional relationship of three adjacent single sound buffer parts and a string seen from the front.
- FIG. It is a schematic diagram showing the positional relationship between a string and a buffer member in a state before the hammer head strikes the string in the weak sound performance mode.
- the weak sound system 1 according to the first embodiment is a system in which the performance mode can be switched between a normal performance mode and a weak performance mode having a volume lower than that of the normal performance mode in an upright piano.
- FIG. 1 is a cross-sectional view of a main part when viewed from the juxtaposition direction of an action mechanism 2 and a damper 4 of an upright piano provided with a weak sound system 1 according to the first embodiment.
- the action mechanism 2 operates in conjunction with the keyboard 4 and strikes the corresponding string 5.
- the action mechanism 2 is provided on an action rail 6 that extends along the direction in which the keyboards 4 are arranged side by side. In the following description, the direction from the string 5 toward the action mechanism 2 (right direction in FIG. 1) is the front, and the opposite direction (left direction in FIG. 1) is the rear.
- the action mechanism 2 mainly includes a wipen 210, a jack 220, a regulating button 230, a bat 240, and a hammer 250.
- the Wipen 210 is supported by the Wipen flange 211 fixed to the lower end of the action rail 6 so as to be rotatable in the vertical direction.
- the wipen 210 is normally held substantially horizontally by the wipen heel 212 provided on the lower surface thereof being placed on the capstan button 41 provided on the upper surface of the keyboard 4.
- the jack 220 is substantially L-shaped when viewed from the direction in which the keyboards 4 are arranged side by side.
- the jack 220 is supported at its bent portion by a jack flange 213 provided on the upper surface of the wipen 210 so as to be rotatable in the front-rear direction. Further, the jack 220 is urged counterclockwise in FIG. 1 by a jack spring 214 provided on the upper surface of the wipen 210. Further, the end portion of the first arm portion 221 extending above the jack 220 is in contact with the lower surface of the bat 240. Further, the end portion of the second arm portion 222 extending forward of the jack 220 is positioned below the regulating button 230.
- the regulating button 230 is provided below a regulating rail 231 extended for each section obtained by grouping a plurality of action mechanisms 2 provided on the piano.
- the distance between the regulating button 230 and the end of the second arm portion 222 of the jack 220 is such that the jack 220 moves from the bottom surface of the bat 240 when the hammer head 251 approaches the string 5 to about 2 to 3 mm in the normal performance mode.
- the distance to escape is set for each action mechanism 2.
- a band-shaped member 121 described later is positioned between the regulating button 230 and the end of the second arm portion 222 of the jack 220.
- the bat 240 is supported by a butt flange 241 provided on the front surface of the action rail 6 so as to be rotatable in the front-rear direction. Further, the bat 240 is urged clockwise in FIG. 1 by a butt spring 242.
- the hammer 250 includes a hammer head 251 and a hammer shank 252.
- the hammer head 251 is composed of an elastic member such as a felt, and strikes the string directly in the normal performance mode, and strikes the string 5 via the buffer member 112 described later during the performance of the weak sound.
- the hammer shank 252 extends upward from the bat 240, and a hammer head 251 is attached to the upper end portion of the hammer shank 252. The hammer shank 252 is in contact with the hammer rail 7 when the keyboard 4 is not operated.
- the jack 220 when the jack 220 is raised, the upper end portion of the second arm portion 222 of the jack 220 comes into contact with the regulating button 230, and the jack 220 is prevented from moving upward, thereby resisting the urging force of the jack spring 214. Then rotate clockwise. Then, the jack 220 temporarily escapes from the lower part of the bat 240. After the hammer 250 hits the string 5, when the whippen 210 is lowered along with the return operation of the keyboard 4, the jack 220 rotates counterclockwise, and the end of the first arm 221 is again connected to the bat 240. Located at the bottom.
- the damper mechanism 3 mainly includes a damper lever 31, a damper wire 32, and a damper head 33.
- the damper lever 31 is rotatably supported on the action rail 6 by a damper flange 34 at an intermediate portion thereof. Further, since the damper lever 31 is urged counterclockwise by the damper spring 35, the damper head 33 abuts against the string 5 and suppresses free vibration of the string 5.
- the above-described action mechanism 2 and damper mechanism 3 have the same configuration as the action mechanism and damper mechanism of a conventional upright piano.
- the weak sound system 1 is a system in which the performance mode can be switched between the normal performance mode and the weak sound performance mode.
- the normal performance mode is a performance mode in which the string 5 is directly hit by the hammer 250
- the weak sound performance mode is a performance mode in which the string 5 is hit by the hammer 250 via a buffer member 112 described later. It is.
- the weak sound system 1 includes a weak sound device 110 and a let-off switching device 120.
- the sound attenuation device 110 includes a muffler rail 111, a buffer member 112, and a rail drive unit (not shown).
- the muffler rail 111 is a rail for supporting the buffer member 112, and as shown in FIG. 1 as an example, the muffler rail 111 is a rail having an L-shaped cross section that extends in the direction in which the keyboard 4 is juxtaposed.
- the muffler rail 111 has a first rail position (a position indicated by a solid line in FIG. 1) in a weak performance mode and a second rail position (indicated by a two-dot chain line in FIG. 1) in a normal performance mode by a rail driving unit (not shown). Position).
- the shock absorbing member 112 has a first shock absorbing member position (a position indicated by a solid line in FIG. 1) interposed between the hammer 250 and the string 5 when the hammer 250 strikes the string 5 in the weak sound performance mode. In the performance mode, when the hammer 250 strikes the string 5, it can be moved between the second buffer member position (position indicated by a two-dot chain line in FIG. 1) that is not interposed between the hammer 250 and the string 5. It is an important member.
- the buffer member 112 is interposed between the hammer 250 and the string 5 in the weak sound performance mode, and weakens the sound generated by the string 5 by alleviating the collision between the hammer head 251 and the string 5.
- the buffer member 112 is formed from a cushioning sheet material such as a felt material, for example.
- FIG. 2 is a perspective view of a main part of the sound attenuator 110.
- the buffer member 112 is integrally formed from a base portion 112a and a plurality of single sound buffer portions 112b.
- the base portion 112a of the buffer member 112 and the plurality of single sound buffer portions 112b are integrally formed, but the configuration of the buffer member 112 is not limited to this.
- a plurality of buffer members that function similarly to the plurality of single sound buffer portions 112b may be configured to be fixed to the muffler rail 111, respectively.
- the base 112a is provided along the muffler rail 111, and is fixed to the surface of the muffler rail 111 facing the string 5 with an adhesive, a double-sided tape, or the like.
- the single sound buffer 112b is formed to extend downward from the base 112a so as to be parallel to each of the plurality of hammer heads 25 in a one-to-one correspondence.
- the single sound buffer 112b is interposed between the hammer head 251 and the string 5 when the corresponding hammer head 251 hits the string 5 in the weak sound performance mode.
- FIG. 3 is a diagram showing the positional relationship between the three adjacent single sound buffer portions 112b and the strings 5 as viewed from the front.
- the single sound buffer 112 b is provided in the parallel direction of the keyboard 4 (see FIG. 1) with a gap having a predetermined width d (for example, 1 mm) from each other.
- each of the single sound buffer portions 112b has a width so as to overlap the string 5 hit by the corresponding hammer head 251 and not overlap the adjacent string 5 hit by the corresponding hammer head 251 when viewed from the front. Have.
- FIG. 4A and 4B are schematic views showing the positional relationship between the string 5 and the buffer member 112 in the weak performance mode in FIG. 4A shows a state before the hammer head 251 strikes the string 5, and FIG. 4B shows a state where the hammer head 251 strikes the string 5 via the buffer member 112.
- the buffer member 112 is positioned away from the string 5 by a predetermined distance x (for example, 15 mm) in the weak sound performance mode.
- x for example, 15 mm
- the buffer member 112 has a thickness that has durability against such a repeated bending operation and has a flexibility that can be easily returned from the bent state to the state before the bending.
- the rail drive unit moves the muffler rail 111 between a first rail position (a position indicated by a solid line in FIG. 1) and a second rail position (a position indicated by a two-dot chain line in FIG. 1) according to a user operation.
- the muffler rail 111 is fixed to the piano body.
- the rail driving unit is realized by a known mechanism that moves the muffler rail 111 in the vertical direction by operating a pedal. For example, in a state where the pedal is not operated, that is, in the normal performance mode, the muffler rail 111 is located at the second rail position. Further, in the state where the pedal is operated, that is, in the weak sound performance mode, the muffler rail 111 moves downward and is located at the first rail position.
- the let-off switching device 120 is a device that switches between let-off in the normal performance mode and let-off in the weak sound performance mode.
- “let-off” in the present embodiment represents the distance between the hammer head 251 and the string 5 when the jack 220 escapes from the bat 240.
- FIG. 5 is a schematic perspective view of the let-off switching device 120 according to the present embodiment as viewed from the front
- FIG. 6 is a diagram for explaining the operation of the weak sound system 1 according to the present embodiment as viewed from the parallel direction of the keyboard 4.
- the let-off switching device 120 includes a belt-like member 121, a support member 122, a weight 123, and a connecting member 124.
- the band-shaped member 121 is a first band-shaped member position (a position represented by a solid line) located between the regulating buttons 230 of the plurality of action mechanisms 2 and the jack 220 in the weak performance mode. ) And a second belt-like member position (position indicated by a two-dot chain line) that is not located between the regulating button 230 and the jack 220 of the plurality of action mechanisms 2 in the normal performance mode. It is a member.
- the belt-like member 121 is formed in a belt shape extending substantially parallel to the regulating rail 231, that is, in the parallel direction of the action mechanism 2. Both ends of the strip member 121 in the parallel direction of the action mechanism 2 are fixed to the support member 122, and can be rotated around the rotation axis O along the extending direction of the regulating rail 231 together with the support member 122.
- the band-shaped member 121, together with the support member 122 is a first band-shaped member position (a position represented by a solid line) and a second band-shaped member position (a two-dot chain line). Position).
- the belt-like member 121 is specifically formed from a flexible material such as cloth, and is fixed to the support member 122 in a state where a predetermined tension is applied in the parallel direction of the action mechanism 2.
- the belt-like member 121 is fixed to the support member 122 by an adhesive means such as a double-sided tape or an adhesive, or an arbitrary fixing means such as a screw.
- the thickness of the belt-like member 121 has a thickness corresponding to the thickness of the buffer member 112. That is, in the weak sound performance mode, if the position of the hammer head 251 when the jack 220 is retracted is moved forward by the thickness of the buffer member 112 located between the string 5 and the hammer 250 (ie, letoff). Since the movement distance of the hammer 250 until the string is hit is not different from the normal performance mode, the key touch in the weak performance mode is the same as the key touch in the normal performance mode. The let-off depends on the distance that the jack 220 can move between the regulating button 230 and the jack 220.
- the distance that the jack 220 can move between the regulating button 230 and the jack 220 depends on the thickness of the band-shaped member 121.
- the support member 122 is configured to support both ends of the strip-shaped member 121 in the parallel direction of the plurality of action mechanisms 2 and to be movable together with the strip-shaped member 121.
- each end of the belt-like member 121 is fixed to the lower end of each of the two support members 122. Further, as shown in FIG. 5, each of the supporting members 122 is centered on a rotation axis O substantially parallel to the parallel direction of the action mechanism 2, that is, the extending direction of the regulating rail 231, at both ends of the regulating rail 231. It is provided so as to be rotatable.
- the support member 122 in the weak sound performance mode, is positioned such that the strip member 121 is at the first strip member position. At this time, the belt-shaped member 121 is moved rearward from the first belt-shaped member position so that the belt-shaped member 121 is reliably positioned at the first belt-shaped member position, that is, the support member 122 is rotated by the gravity applied to the weight 123. The rotation of the support member 121 is restricted by a stopper 232 provided on the regulating rail 231 so as not to occur.
- the support member 122 is pulled upward by the connecting member 124 against the gravity applied to the weight 123, so that the belt-like member 121 is moved to the second belt-like member position. Located as it is.
- the weight 123 moves downward from the support member 122 (clockwise in FIG. 6) so that the strip member 121 is stably positioned at the first strip member position in a state where the support member 122 is not pulled upward by the connecting member 124. Around). Specifically, the weight 123 is fixed to the lower end portion of the support member 122 ahead of the position where the belt-shaped member 121 is fixed.
- the connecting member 124 connects the muffler rail 111 and the support member 122 so that the muffler rail 111 and the support member 122 are interlocked.
- the connecting member 124 is composed of a string-like member that connects the muffler rail 111 and the support member 122. It is preferable that the string-like member has flexibility enough to fit a curved surface formed on the front surface of the hammer rail 7.
- One end of the connecting member 124 is fixed to the support member 122 on the front side of the rotation axis O of the support member 122.
- the other end of the connecting member 124 is detachably fixed to the muffler rail 111. As shown in FIG.
- the connecting member 124 connects the muffler rail 111 and the support member 122 through the front of the hammer rail 7. Moreover, it is preferable that the connection member 124 is comprised so that adjustment of the length is possible. Thereby, the distance which the support member 122 moves by pulling upward can be adjusted.
- the muffler rail 111 is arranged so that the buffer member 112 is interposed between the hammer head 251 and the string 5 when the hammer head 251 strikes the string 5.
- the buffer member 112 is positioned at the first buffer member position (see the position of the solid line in FIG. 1).
- FIG. 6 since the muffler rail 111 is located at the first rail position, there is no upward tension applied to the support member 122 via the connecting member 124, so the support member 122 is attached to the weight 123. It rotates clockwise by the gravity and stops at a position regulated by the stopper 232. Thereby, the strip
- the position of the hammer head 251 when the jack 220 is retracted is Move forward (ie, letoff spreads more) than in normal performance mode. Since the distance moved forward is approximately equal to or greater than the thickness of the buffer member 112, the hammer head 251 moves approximately equal to or greater than the normal performance mode until the string is hit. Therefore, even if the buffer member 112 is interposed between the hammer 250 and the string 5, the jack 220 can be moved back and a key touch similar to the normal performance mode can be obtained.
- the muffler rail 111 prevents the buffer member 112 from being interposed between the hammer head 251 and the string 5 when the hammer head 251 strikes the string 5. Is positioned at the second rail position, and the buffer member 112 is positioned at the second buffer member position (see the position of the two-dot chain line in FIG. 1). Further, as shown in FIG. 6, since the muffler rail 111 is positioned at the second rail position, the support member 122 is pulled upward via the connecting member 124, so that the support member 122 is subjected to gravity applied to the weight 123. It rotates counterclockwise and stops when the muffler rail 111 stops. Thereby, the strip
- the hammer head 25 corresponding to the depressed keyboard 4 is rotated toward the string 5 by the known action mechanism 2.
- the strip-shaped member 121 is not positioned between the jack 220 and the regulating button 230, the jack 220 moves until it abuts on the regulating button 230.
- the hammer head 251 strikes the string 5 directly without passing through the buffer member 112. Therefore, the struck string emits a sound without being weakened by the single sound buffer member 120.
- the hammer head 251 strikes the string 5 via the buffer member 112 in the weak sound performance mode.
- the support member 122 rotates in conjunction with the muffler rail 111, and the belt-like member 121 fixed to the support member 122 is positioned between the regulating button 230 and the jack 220. Accordingly, the distance that the jack 220 can move is shortened, and the position of the hammer head 251 when the jack 220 is retracted moves forward by the thickness of the buffer member 112 than in the normal performance mode. Therefore, even if the buffer member 112 is interposed between the hammer head 251 and the string 5, the jack 220 can be moved back, and the touch similar to the normal performance mode can be reproduced.
- the belt-like member 121 extending substantially parallel to the regulating rail 231 is linked to the muffler rail 111 so that it is between the first belt-like member position and the second belt-like member position.
- the distance that the jack 220 can move between the regulating button 230 and the jack 220 is switched. Therefore, it is possible to selectively switch between the weak sound performance mode and the normal performance mode with a simple configuration without impairing the key touch.
- the weak sound system of the upright piano has been described.
- the piano weak sound system of the present invention may be applied not only to an upright piano but also to a grand piano.
- a weak sound system applied to a grand piano will be described.
- the weak sound system 1 according to the second embodiment is a system in which a performance mode can be switched between a normal performance mode and a weak performance mode having a volume lower than that of the normal performance mode in a grand piano.
- FIG. 7 is a cross-sectional view of the main part when viewed from the juxtaposition direction of the keyboard of the action mechanism 2a and the damper mechanism 3a of the grand piano provided with the weak sound system 1a according to the second embodiment.
- the action mechanism 2 a operates in conjunction with the keyboard 4 and strikes the corresponding string 5.
- the action mechanism 2a is provided on an action rail 6 that extends along the direction in which the keyboards 4 are arranged side by side.
- the action mechanism 2a is mainly composed of a wipen 210, a jack 220, a regulating button 230, a repetition lever 260, and a hammer 250.
- the Wipen 210 is supported by the Wipen flange 211 fixed to the Wipen rail 8 so as to be rotatable in the vertical direction.
- the wipen 210 is normally held substantially horizontally by the wipen heel 212 provided on the lower surface thereof being placed on the capstan button 41 provided on the upper surface of the keyboard 4.
- the jack 220 is substantially L-shaped when viewed from the direction in which the keyboards 4 are arranged side by side.
- the jack 220 is supported at the front end portion of the wipen 210 at its bent portion so as to be rotatable in the front-rear direction. Further, the jack 220 is urged counterclockwise in FIG. 7 by a repetition spring 262 provided on the upper surface of the wipen 210. Further, the end portion of the first arm portion 221 extending above the jack 220 is in contact with the lower surface of the hammer roller 253. Further, the end portion of the second arm portion 222 extending forward of the jack 220 is positioned below the regulating button 230.
- the regulating button 230 is provided below the action rail 6.
- the distance between the regulating button 230 and the end of the second arm portion 222 of the jack 220 is such that when the hammer head 251 approaches the string 5 to about 2 to 3 mm in the normal performance mode, the jack 220 moves to the bottom surface of the hammer roller 253.
- the distance to escape from is set for each action mechanism 2.
- a first band member 131 described later is located between the regulating button 230 and the upper end portion of the second arm portion 222 of the jack 220.
- the repetition lever 260 is supported at the upper end of the repetition flange 261 provided at the substantially central portion of the wipen 210 so that the central portion is rotatable in the vertical direction. Further, the repetition lever 260 is urged counterclockwise in FIG. 7 by the repetition spring 262. A repetition leather 263 is provided on the upper surface of the front end portion of the repetition lever 260.
- the hammer 250 is mainly composed of a hammer head 251, a hammer shank 252, and a hammer roller 253.
- the hammer head 251 is composed of an elastic member such as a felt, and strikes the string 5 directly in the normal performance mode, and strikes the string 5 via a buffer member 112 described later in the weak performance mode.
- the front end portion of the hammer shank 252 is rotatably supported by the rear end portion of the shank flange 254 fixed to the action rail 6.
- the hammer roller 253 is provided on the lower surface of the front end portion of the hammer shank 252 and is placed on the upper surface of the repetition lever 260 in the initial state.
- a drop screw 255 protruding downward is provided on the lower surface of the rear end portion of the shank flange 254. Further, in the weak sound performance mode, a second band member 141 described later is positioned between the drop screw 255 and the repetition leather 263.
- the hammer 250 rotates clockwise in FIG. 7, and the hammer head 251 provided at the rear end of the hammer 250 strikes the string 5 corresponding to the keyboard 4 on which the key is pressed. Further, after the hammer 250 hits the string 5, when the whippen 210 is lowered along with the returning operation of the keyboard 4, the jack 220 rotates counterclockwise, and the end of the first arm portion 221 again becomes the hammer. Located below the roller 253.
- the damper mechanism 3 a is mainly composed of a damper lever 31, a damper block 37, a damper wire 32, and a damper head 33.
- the damper lever 31 is supported by a damper flange 34 provided at the rear end portion of the damper rail 9 so as to be rotatable in the vertical direction.
- the damper head 33 is provided at the front end portion of the damper lever 31 via the damper block 37 and the damper wire 32. The damper head 33 normally suppresses free vibration of the string 5 by pressing the string 5 from above.
- the action mechanism 2a and the damper mechanism 3a described above have the same configuration as the action mechanism and the damper mechanism of the conventional grand piano.
- the weak sound system 1a selectively switches between the normal performance mode in which the string 5 is directly hit by the hammer 251a and the weak performance mode in which the string 5 is hit through a buffer member described later by the hammer 251a. It is a possible system.
- FIG. 8 is a diagram for explaining the operation of the weak sound system according to the second embodiment, as viewed from the side-by-side direction of the keyboard. As shown in FIG.7 and FIG.8, the weak sound system 1a is comprised from the weak sound apparatus 110a and the let-off switching apparatus 120a.
- the sound attenuator 110 a includes a muffler rail 111, a buffer member 112, a rail support device 113, and a rail drive unit 114.
- the muffler rail 111 is a rail for supporting the buffer member 112 and is configured to extend in the direction in which the keyboard 4 is juxtaposed, as shown in FIG. 7 and FIG. 8 as an example. It is an L-shaped rail.
- the muffler rail 111 is supported by rail support devices 113 at both ends of the keyboard 4 in the juxtaposed direction.
- the muffler rail 111 has a first rail position (a position indicated by a two-dot chain line in FIGS. 7 and 8) in the normal performance mode and a second rail in the weak sound performance mode as the rail support device 113 rotates. The position (the position indicated by the solid line in FIGS. 7 and 8) can be moved.
- the buffer member 112 is a first buffer member position (position indicated by a solid line in FIGS. 7 and 8) interposed between the hammer 250 and the string 5 when the hammer 250 strikes the string 5 in the weak sound performance mode. And in the normal performance mode, when the hammer 250 strikes the string 5, the second buffer member position (position indicated by the two-dot chain line in FIG. 1) that is not interposed between the hammer 250 and the string 5. Is a movable member.
- the buffer member 112 is interposed between the hammer 250 and the string 5 in the weak sound performance mode, and weakens the sound generated by the string 5 by alleviating the collision between the hammer head 251 and the string 5.
- the buffer member 112 is configured in the same manner as the buffer member 112 in the first embodiment, except for the movement path between the first buffer member position and the second buffer member position.
- the rail support device 113 supports both ends of the muffler rail 111 so that the muffler rail 111 can move between the first rail position and the second rail position.
- the rail support device 113 includes a first pillar member 115, a second pillar member 116, a connecting portion 117, and a base material 118.
- the first column member 115 is erected upward from the base material 118, and the upper end portion thereof is connected to the second column member 116 via the connection portion 117.
- One end portion of the second column member 116 is connected to the connecting portion 117, and the other end portion is connected to each end portion of the muffler rail 111.
- the connecting portion 117 connects the first column member 115 and the second column member 116 so as to be relatively rotatable in a plane perpendicular to the parallel arrangement direction of the keyboard 4. Specifically, the connecting portion 117 has an angle between the second column member 116 and the first column member 115 of approximately 180 ° (that is, the state where the muffler rail 111 is positioned at the first rail position), and approximately. The first column member 115 and the second column member 116 are coupled so as to move between 90 ° (that is, the state where the muffler rail 111 is located at the second rail position).
- the base material 118 is a plate-like member fixed to the piano body.
- FIG. 9 is a diagram for explaining a method of fixing the weak sound system 1a according to this embodiment to the grand piano as viewed from the direction in which the keyboards 4 are arranged side by side.
- the keyboard 4 and the action mechanism 2 a are placed on the bowl 10.
- the action rail 6 and the wippen rail 8 are fixed on a bracket 1100 that is arranged in plural in the juxtaposition direction of the keyboard 4 on the bowl 10.
- the bracket 1100 is fixed on the flange 10 with a plurality of screws 1110.
- the rail 1110 is fixed with a screw 1110 while the base material 118 of the rail support device 113 is sandwiched between the bracket 11100 and the screw 1110 that fixes the rear end of the bracket 1100 to the flange 10.
- the support device 113 is fixed. Thereby, the rail support device 113 can be fixed without separately opening a hole for fixing the rail support device 113 to the wooden piano body.
- the rail drive unit 114 moves the muffler rail 111 between the first rail position and the second rail position shown in FIGS. 7 and 8 in accordance with a user operation. Specifically, the rail drive unit 114 is attached so that the operation unit 114a operated by the user, the connection unit 114b connecting the muffler rail 111 and the operation unit 114a, and the muffler rail 111 are positioned at the second rail position. It is comprised from the biasing part 114c which biases, and the position of the muffler rail 111 can be moved manually.
- the operation unit 114a is formed in a ring shape as an example, and the user pulls the operation unit 114a against the urging force of the urging unit 114c, for example, by hooking the operation unit 114a on a tuning pin (not shown).
- 111 can be held at the first rail position. Further, when the user does not pull the operation portion 114a (a state where no tension is applied to the connecting portion 114b), the connecting portion 117 resists the urging force of the urging portion 114c and the second support member 116 is the first supporting member.
- the muffler rail 111 can be held at the second rail position because the muffler rail 111 is held at an angle of about 90 ° with respect to 115.
- the connecting portion 114b is configured by a string-like member that connects the muffler rail 111 and the operation portion 114a.
- the urging portion 114c has one end fixed to the muffler rail 111, the other end fixed to the base material 118, and urges the muffler rail 111 to be positioned at the second rail position. It is composed of a string-like member partially having a biasing means such as rubber or a spring.
- the muffler rail 111 in a state where the operation unit 114a is not pulled, that is, in the normal performance mode, the muffler rail 111 is located at the second rail position indicated by the two-dot chain line in FIGS. Further, in the state where the operation unit 114a is pulled, that is, in the weak sound performance mode, the muffler rail 111 rotates upward and is positioned at the first rail position indicated by the solid line.
- the let-off switching device 120a in the present embodiment is a device that switches between let-off in the normal performance mode and let-off in the weak sound performance mode.
- “let-off” in the present embodiment represents the distance between the hammer head 251 and the string 5 when the jack 220 has escaped from the hammer roller 253.
- the let-off switching device 120a is not only between the regulating button 230 and the jack 220 but also between the drop screw 255 and the repetition lever 260 in the weak performance mode. Different from the let-off switching device 120 according to the first embodiment.
- FIG. 10 shows a perspective view of the let-off switching device 120a according to the present embodiment as viewed from the rear.
- the letoff switching device 120 a is rotatably supported by a fixing device 150 positioned between the bracket 1100 and the action mechanism 2 (see FIG. 7) adjacent to the bracket 1100.
- the fixing device 150 is substantially perpendicular to the juxtaposed direction of the keyboard 4, and is a support surface 151 that supports the let-off switching device 120 a and the juxtaposed direction of the keyboard 4 from the upper end portion of the support surface 151 toward the bracket 1100. It is formed integrally with a fixed surface 152 extending in the direction.
- the fixed surface 152 is attached to a mounting member 153 extending rearward from the action rail 6 on the upper surface of the bracket 1100 by bolts 154 and nuts 155. Thereby, the let-off switching device 120a is fixed to the bracket 1100 via the fixing device 150.
- the let-off switching device 120a includes a first strip member 131, a first support member 132, a first weight 133, a first connecting member 134, a second strip member 141, a second support member 142, and a second weight. 143 and a second connecting member 144.
- the first band member 131 is positioned in the first band-shaped member position (solid line) located between the regulating buttons 230 and the jacks 220 of the plurality of action mechanisms 2 in the weak performance mode.
- a second belt-like member position position indicated by a two-dot chain line that is not located between the regulating button 230 and the jack 220 of the plurality of action mechanisms 2 in the normal performance mode. It is configured to be movable between.
- the first strip member 131 is formed in a strip shape extending in the parallel direction of the action mechanism 2. Both end portions in the parallel direction of the action mechanism 2 of the first strip member 131 are fixed to the first support member 132, respectively. Then, as shown in FIG. 8, the first belt-like member 131 rotates around the rotation axis O1 together with the first support member 132, so that the first belt-like member position (the position represented by the solid line) and the second belt-like member. It moves between member positions (positions indicated by two-dot chain lines).
- the first belt-like member 131 is formed of a flexible material such as cloth, and is fixed to the first support member 132 in a state where a predetermined tension is applied in the parallel direction of the action mechanism 2. .
- the first belt-like member 131 is fixed to the lower end portion of the first support member 132 by a screw (not shown) through a washer (not shown).
- belt-shaped member 131 is not restricted to this, You may fix to the 1st support member 132 by arbitrary fixing means, such as adhesive means, such as a double-sided tape and an adhesive agent.
- Such a first belt-like member 131 can be configured in the same manner as the belt-like member 121 of the first embodiment in other points. Accordingly, the first strip member 131 functions in the same manner as the strip member 121 of the first embodiment.
- the first support member 132 is configured to support both ends of the first strip member 131 in the parallel direction of the plurality of action mechanisms 2 and to be movable together with the first strip member 131.
- the first support member 132 includes a bearing 135, a case 136, and adjustment members 137 and 138.
- the bearing 135 is for fixing the case 136 to the support surface 151 of the fixing device 150 so as to be rotatable about a rotation axis O1 parallel to the parallel direction of the plurality of action mechanisms 2.
- the case 136 is formed in a U-shaped cross section so that the front side is open.
- the center portion of the case 136 accommodates the bearing 135, and the upper end portion and the lower end portion of the case 136 sandwich the adjusting members 137 and 138.
- the adjustment member 137 is for adjusting the length of the first connecting member 134 between the first support member 132 and the second support member 142.
- the movement of the first connecting member 134 is restricted.
- the adjustment member 137 By moving the adjustment member 137 in the forward direction and forming a gap between the adjustment member 137 and the rear surface of the case 136, the first connecting member 134 can be moved. Accordingly, the adjustment member 137 is moved rearward with the length of the first connecting member 134 between the first support member 132 and the second support member 142 being appropriate, and the adjustment member 137 and the rear surface of the case 136 are moved. By sandwiching the first connecting member 134, the length can be maintained.
- the adjustment member 138 is for adjusting the position of the first strip member 131.
- the first strip member 131 is fixed to the lower surface of the adjustment member 138. Further, the vertical position of the first belt-like member 131 can be adjusted by moving the adjustment member 138 in the vertical direction while being sandwiched by the case 136.
- the first support member 132 is positioned such that the first strip member 131 is at the first strip member position.
- the first belt member 131 is rotated by the gravity applied to the weight 133 so that the first belt member 131 is surely positioned at the first belt member position, that is, the first belt member 131 is moved to the first belt member.
- the first support member 131 is restricted from rotating by a first stopper 156 provided in the fixing device 150 so as not to move backward from the position.
- the lower end portion of the first stopper 156 is configured to be foldable in the front-rear direction. Therefore, by adjusting the bending angle of the lower end portion of the first stopper 156, the front-rear position of the first strip member 131 when the first support member 132 contacts the lower end portion of the first stopper 156 can be adjusted. .
- the first support member 132 rotates by being pulled counterclockwise by the first connecting member 134 against the gravity applied to the first weight 133, and the first band-shaped member 131 is the second one. It is located so as to be in the band-shaped member position.
- the first weight 133 is lowered to the first support member 122 so that the first band member 131 is stably positioned at the first band member position in a state where the first support member 132 is not pulled by the connecting member 134. A force in the direction (clockwise in FIG. 8) is applied. Specifically, the first weight 133 is fixed to the lower end portion of the first support member 132 ahead of the position where the first strip member 131 is fixed.
- the first connecting member 134 connects the second supporting member 142 and the first supporting member 132 so that the second supporting member 142 and the first supporting member 132 are interlocked.
- the first connecting member 134 is composed of a single string-like member, and one end is sandwiched between the rear surface of the first support member 132 and the adjustment member 137, and the other end is the second. It is sandwiched between the front surface of the support member 142 and the adjustment member 148. Accordingly, when the second support member 142 rotates, the first support member 132 rotates in the direction opposite to the second support member 142.
- the second belt-like member 141 spans between the drop screw 255 of the plurality of action mechanisms 2 and the front end portion (repetition leather 263) of the repetition lever 260 in the weak sound performance mode.
- the third belt-like member position (the position indicated by the solid line) located in the middle and the fourth belt-like member position (two points) not located between the regulating buttons 230 and the jacks 220 of the plurality of action mechanisms 2 in the normal performance mode.
- a position represented by a chain line a position represented by a chain line.
- the second strip member 141 is formed in a strip shape extending in the parallel direction of the action mechanism 2. Both end portions of the strip member 141 in the parallel direction of the action mechanism 2 are fixed to the second support member 142, respectively. Then, as shown in FIG. 8, the second belt-like member 141 rotates around the rotation axis O2 together with the second support member 142, so that the third belt-like member position (position represented by the solid line) and the fourth belt-like member are obtained. It moves between member positions (positions indicated by two-dot chain lines).
- the second belt-like member 141 is specifically formed of a flexible material such as cloth, and is fixed to the second support member 142 in a state where a predetermined tension is applied in the parallel direction of the action mechanism 2. .
- the second belt-like member 141 is fixed to the upper end portion of the second support member 142 with a screw 162 through a washer 161.
- belt-shaped member 141 is not restricted to this, You may fix to the 2nd support member 142 by adhesive means, such as a double-sided tape and an adhesive agent.
- the second support member 142 is configured to support both ends of the second strip member 141 in the parallel direction of the plurality of action mechanisms 2 and to be movable together with the second strip member 141.
- the second support member 142 includes a bearing 145, a case 146, and adjustment members 147 and 148.
- the bearing 145 is for fixing the case 146 to the support surface 151 of the fixing device 150 so as to be rotatable about a rotation axis O2 parallel to the parallel direction of the plurality of action mechanisms 2.
- the case 146 is formed in a U-shaped cross section so that the rear side is open. The center portion of the case 146 accommodates the bearing 145, and the upper end portion and the lower end portion of the case 146 sandwich the adjusting members 147 and 148.
- the adjustment member 147 is for adjusting the position of the second strip member 141.
- the second strip member 141 is fixed to the upper surface of the adjustment member 147.
- the vertical position of the second belt-shaped member 141 can be adjusted by moving the adjustment member 147 in the vertical direction while being sandwiched by the case 146.
- the adjustment member 148 includes a length of the first connection member 134 between the first support member 132 and the second support member 142 and a length of the second connection member 144 between the second support member 142 and the muffler rail 111. It is for adjusting the thickness. When the adjustment member 148 is sandwiched with the front surface of the case 146, the movement of the first connecting member 134 and the second connecting member 144 is restricted.
- the first connection member 134 and the second connection member 144 are movable. Accordingly, the length of the first connection member 134 between the first support member 132 and the second support member 142 and the length of the second connection member 144 between the second support member 142 and the muffler rail 111 are appropriate. In such a state, the length of the adjustment member 148 can be maintained by moving the adjustment member 148 forward and sandwiching the first connection member 134 and the second connection member 144 between the adjustment member 148 and the front surface of the case 146.
- the first connecting member 134 is configured to be adjustable by either the adjusting member 147 or 148. Also good. For example, one end of the first connecting member 134 is fixed to the upper end of the case 136, and the other end of the first connecting member 134 is sandwiched between the adjustment member 148 and the case 146. May be. Alternatively, one end portion of the first connecting member 134 is fixed to the lower end portion of the case 146, and the other end portion of the first connecting member 134 is sandwiched between the adjustment member 137 and the case 136. May be. Even in such a configuration, the length of the first connecting member 134 can be adjusted as in the present embodiment.
- the second support member 142 is positioned such that the second strip member 141 is at the third strip member position.
- the second belt-like member 141 is rotated by the gravity applied to the second weight 143 so that the second belt-like member 141 is reliably positioned at the third belt-like member position, that is, the second belt-like member 141 is third.
- the second support member 142 is restricted from rotating by a second stopper 157 provided in the fixing device 150 so as not to move forward from the band-shaped member position.
- the lower end portion of the second stopper 157 is configured to be bendable in the front-rear direction. Therefore, by adjusting the bending angle of the lower end portion of the second stopper 157, the front-rear position of the second strip member 141 when the second support member 142 contacts the lower end portion of the second stopper 157 can be adjusted. .
- the second support member 142 rotates by being pulled clockwise by the second connecting member 144 against the gravity applied to the second weight 143, and the second strip member 141 is rotated by the fourth strip member. Position to be in position.
- the second weight 143 is configured so that the second support member 142 is stably positioned at the position of the third strip member in a state where the second support member 142 is not pulled by the second connecting member 144. A downward force (counterclockwise in FIG. 8) is applied. Specifically, the second weight 143 is fixed to the lower end portion of the second support member 142 (adjustment member 148) behind the position where the second strip member 141 is fixed.
- the second connecting member 144 connects the muffler rail 111 and the second support member 142 so that the muffler rail 111 and the second support member 142 are interlocked.
- the second connecting member 144 is composed of a single string-like member, and one end is sandwiched between the front surface of the second support member 142 and the adjustment member 148, and the other end is the muffler rail. It is fixed to the end of 111. Thereby, when the muffler rail 111 rotates, the second support member 142 also rotates in the opposite direction.
- the muffler rail 111 is configured such that when the rail drive unit is operated so as to enter the weak sound performance mode, the buffer member 121 is interposed between the hammer head 251 and the string 5 when the hammer head 25 strikes the string 5. Is positioned at the first rail position, and the buffer member 121 is positioned at the first buffer member position (see the position of the solid line in FIG. 7). Further, as shown in FIG. 8, since the rear tension applied to the second support member 142 via the second connecting member 144 disappears with the movement of the muffler rail 111, the second support member 144 has the second weight.
- the first support member 132 rotates clockwise by the gravity applied to the first weight 133 and stops at a position regulated by the first stopper 156.
- belt-shaped member 131 is located in a 2nd strip
- belt-shaped member 141 is located in a 4th strip
- the hammer head 25 corresponding to the depressed keyboard 4 is rotated toward the string 5 by the known action mechanism 2a. Then, the hammer head 25 strikes the string 5 via the corresponding buffer member 112. Therefore, the sound emitted from the hit string 5 is weakened by the buffer member 112. At this time, the end of the buffer member 112 that is not fixed to the muffler rail 111 is pushed upward by the hammer head 251 and moves upward, but only contacts the string 5 that the corresponding hammer head 251 strikes. The string 5 adjacent to is not touched. Accordingly, no dissonance occurs due to the contact between the string 5 corresponding to the depressed keyboard 4 and the adjacent string 5 and the buffer member 112.
- the distance that the jack 220 can move between the jack 220 and the regulating button 230 is shortened by the thickness of the first strip member 131. Furthermore, the distance that the repetition lever 260 can move between the repetition lever 260 and the drop screw 255 is shortened by the thickness of the second belt-shaped member 141. Therefore, the position of the hammer head 251 when the jack 220 escapes moves downward (that is, the let-off spreads) as compared with the normal performance mode. Since the distance moved downward is equal to the thickness of the buffer member, the hammer head 251 moves the same distance as in the normal performance mode until the string is hit. Therefore, even if the buffer member 112 is interposed between the hammer 250 and the string 5, the jack 220 can be retreated, and at the same time, the drop operates properly, and the same key touch as in the normal performance mode can be obtained. .
- the muffler rail 111 prevents the buffer member 112 from being interposed between the hammer head 251 and the string 5 when the hammer head 251 strikes the string 5. Is positioned at the second rail position, and the buffer member 112 is positioned at the second buffer member position (see the position of the two-dot chain line in FIG. 7). Further, as shown in FIG.
- the hammer head 251 corresponding to the depressed keyboard 4 is rotated toward the string 5 by the known action mechanism 2a.
- the jack 220 moves until it comes into contact with the regulating button 230.
- the second band-shaped member 141 is not positioned between the repetition lever 260 and the drop screw 255, the repetition lever 260 moves until it abuts on the drop screw 255.
- the hammer head 251 strikes the string 5 via the buffer member 112 in the weak sound performance mode.
- the second support member 142 rotates in conjunction with the muffler rail 111, and the second strip member 141 fixed to the second support member 142 is positioned between the repetition lever 260 and the drop screw 255.
- the first support member 132 rotates in conjunction with the second support member 142, and the first strip member 131 fixed to the first support member 132 is positioned between the regulating button 230 and the jack 220.
- the position of the hammer head 251 when the jack 220 is retracted moves downward by the thickness of the buffer member 112 as compared with the normal performance mode (that is, the letoff is widened). Therefore, even if the buffer member 112 is interposed between the hammer head 251 and the string 5, the jack 220 can be retreated, and at the same time, the drop can be appropriately operated to reproduce the touch similar to the normal performance mode. .
- the first belt member 131 and the second belt member 141 extending in the parallel direction of the action mechanism 2a are interlocked with the muffler rail 111, and the first belt member position and the second belt member.
- the distance that the drop screw 255 between the repetition lever 260 and the drop screw 255 can move by moving between the member positions and between the third band member position and the fourth band member position, and The distance that the jack 220 can move between the regulating button 230 and the jack 220 is switched. Therefore, it is possible to selectively switch between the weak sound performance mode and the normal performance mode with a simple configuration without impairing the key touch.
- the sound attenuating device 110a is a state in which the base material 118 of the rail support device 113 is sandwiched between the screw 1110 that fixes the rear end of the bracket 1100 to the flange 10 and the bracket 1100. And fixed by screwing with a screw 1110.
- the let-off switching device 120a is fixed to the bracket 1100 via a fixing device 150 attached to the upper surface of the bracket 1100. Accordingly, it is possible to fix the weak sound system 1a without opening a hole for fixing the low sound system 1a in the wooden part of the grand piano.
- the kite is placed on a piano shelf, and by pulling this kite forward, the action mechanism on the kite can be taken out from the inside of the piano and adjusted.
- the weak sound system 1 a according to this embodiment is fixed to the bracket 1100 on the heel 10 together with the action mechanism 2. Therefore, it is possible to easily attach and adjust the weak sound system 1a by pulling out the bowl 10 from the inside of the piano.
- the material of the buffer member 112 is described as the felt material, but the present invention is not limited to this.
- These may be, for example, paper, resin, rubber, urethane, or the like that can be interposed between the hammer head 251 and the string 5 and can relax the collision between the hammer head 251 and the string 5.
- the thickness of the buffer member 112 may be changed according to the sound range of the string 5 hit by the corresponding hammer head 251. Specifically, the thickness of the buffer member 112 corresponding to the hammer head 251 that strikes the string 5 on the high sound side is larger than the thickness of the buffer member 112 corresponding to the hammer head 251 that strikes the string 5 on the low sound side. A thinner one is preferred. Further, the thickness of the band-shaped member 121, the first band-shaped member 131, and the second band-shaped member 141 may be changed according to the thickness of the buffer member 112.
- a sheet-like member such as cardboard may be fixed.
- the first support member 132 is connected to the muffler rail 111 via the first connection member 134, the second support member 142, and the second connection member 144, and interlocks with the muffler rail 111.
- the method of interlocking the first support member 132 and the muffler rail 111 is not limited to this.
- the first connection member 134 may connect the muffler rail 111 and the first support member 132 instead of the second support member 142.
- the second connecting member 144 may connect the muffler rail 111 and the first supporting member 132 instead of the second supporting member 142.
- connection member 124 connects the muffler rail 111 and the support member 122 so that the muffler rail 111 and the support member 122 are interlocked. And the support member 122 may not be connected.
- the muffler rail 111 is located at the first rail position and the belt-like member 121 is located at the first belt-like member position.
- the muffler rail 111 is located at the second rail position and the belt-like member 121 is As long as it is located at the second band-shaped member position, the configuration for moving the muffler rail 111, the band-shaped member 121, and the support member 122 is arbitrary.
- the first support member 132 and the second support member 142 may not be connected, and the second support member 142 and the muffler rail 111 are connected. It does not have to be.
- the let-off switching device 120a is disposed between the bracket 1100 and the action mechanism 2 adjacent to the bracket 1100.
- the position of the let-off switching device 120a is not limited thereto.
- the first support member 132 is disposed in front of the action rail 6.
- the first belt-like member 131 is supported by the first support member 132 so as to be movable between the first belt-like member position and the second belt-like member position (position represented by a two-dot chain line) in the second embodiment.
- the same function as the let-off switching device 120a in the second embodiment can be achieved.
- the present invention is suitably applied to the use of weakening an acoustic piano such as an upright piano or a grand piano.
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Abstract
Description
ハンマーが直接弦を打撃する通常演奏モードと、前記ハンマーが緩衝部材を介して打撃する弱音演奏モードと、に切替可能であり、弱音装置と、レットオフ切替装置と、から構成されるアップライトピアノの弱音システムであって、
前記弱音装置は、
前記弱音演奏モードにおいて、前記ハンマーが前記弦を打撃する際に、前記ハンマーと前記弦との間に介在する第1緩衝部材位置と、前記通常演奏モードにおいて、前記ハンマーが前記弦を打撃する際に、前記ハンマーと前記弦との間に介在しない第2緩衝部材位置と、の間を移動可能な緩衝部材と、
前記緩衝部材を支持し、前記緩衝部材とともに移動可能なレールと、
前記緩衝部材が前記第1緩衝部材位置と前記第2緩衝部材位置との間を移動するように、前記レールを駆動する駆動部と、を備え、
前記レットオフ切替装置は、
前記弱音演奏モードにおいて、前記ピアノに設けられた複数のアクション機構のレギュレーティングボタンとジャックとの間にまたがって位置する第1帯状部材位置と、前記通常演奏モードにおいて、前記ピアノに設けられた複数のアクション機構のレギュレーティングボタンとジャックとの間に位置しない第2帯状部材位置と、の間を移動可能な帯状部材と、
前記帯状部材の、前記複数のアクション機構の並列方向における両端部を支持し、前記帯状部材とともに移動可能な少なくとも1組の支持部材と、を備えることを特徴とする。
ハンマーが直接弦を打撃する通常演奏モードと、前記ハンマーが緩衝部材を介して打撃する弱音演奏モードと、に切替可能であり、弱音装置と、レットオフ切替装置と、から構成されるグランドピアノの弱音システムであって、
前記弱音装置は、
前記弱音演奏モードにおいて、前記ハンマーが前記弦を打撃する際に、前記ハンマーと前記弦との間に介在する第1緩衝部材位置と、前記通常演奏モードにおいて、前記ハンマーが前記弦を打撃する際に、前記ハンマーと前記弦との間に介在しない第2緩衝部材位置と、の間を移動可能な緩衝部材と、
前記緩衝部材を支持し、前記緩衝部材とともに移動可能なレールと、
前記緩衝部材が前記第1緩衝部材位置と前記第2緩衝部材位置との間を移動するように、前記レールを駆動する駆動部と、を備え、
前記レットオフ切替装置は、
前記弱音演奏モードにおいて、前記ピアノに設けられた複数のアクション機構のレギュレーティングボタンとジャックとの間にまたがって位置する第1帯状部材位置と、前記通常演奏モードにおいて、前記複数のアクション機構のレギュレーティングボタンとジャックとの間に位置しない第2帯状部材位置と、の間を移動可能な第1帯状部材と、
前記弱音演奏モードにおいて、前記複数のアクション機構のドロップスクリューとレピティションレバーとの間にまたがって位置する第3帯状部材位置と、前記通常演奏モードにおいて、前記複数のアクション機構のドロップスクリューとレピティションレバーとの間に位置しない第4帯状部材位置と、の間を移動可能な第2帯状部材と、
前記第1帯状部材の、前記複数のアクション機構の並列方向における両端部を支持し、前記第1帯状部材とともに移動可能な少なくと1組の第1支持部材と、
前記第2帯状部材の、前記複数のアクション機構の並列方向における両端部を支持し、前記第2帯状部材とともに移動可能な少なくとも1組の第2支持部材と、を備えることを特徴とする。
ハンマーが直接弦を打撃する通常演奏モードと、前記ハンマーが緩衝部材を介して打撃する弱音演奏モードと、に切替可能なピアノに用いられる支持装置であって、
他の前記支持装置とともに、前記ピアノに設けられた複数のアクション機構の並列方向と略平行に延びる帯状部材の両端部を支持する支持部と、
前記複数のアクション機構の並列方向と略平行な回転軸を中心として前記支持部と回転させる回転部と、を備え、
前記帯状部材を、前記弱音演奏モードにおいて、前記ピアノに設けられた複数のアクション機構のレギュレーティングボタンとジャックとの間にまたがって位置する第1帯状部材位置と、前記通常演奏モードにおいて、前記ピアノに設けられた複数のアクション機構のレギュレーティングボタンとジャックとの間に位置しない第2帯状部材位置と、の間で移動させる、
ことを特徴とする。
ハンマーが直接弦を打撃する通常演奏モードと、前記ハンマーが緩衝部材を介して打撃する弱音演奏モードと、に切替可能なグランドピアノに用いられる支持装置であって、
他の前記支持装置とともに、前記グランドピアノに設けられた複数のアクション機構の並列方向と略平行に延びる帯状部材の両端部を支持する支持部と、
前記複数のアクション機構の並列方向と略平行な回転軸を中心として前記支持部を回転させる回転部と、を備え、
前記帯状部材を、前記弱音演奏モードにおいて、前記複数のアクション機構のドロップスクリューとレピティションレバーとの間にまたがって位置する第1帯状部材位置と、前記通常演奏モードにおいて、前記複数のアクション機構のドロップスクリューとレピティションレバーとの間に位置しない第2帯状部材位置と、の間で移動させる、
ことを特徴とする。
以下、本発明の実施形態1について説明する。実施形態1に係る弱音システム1は、アップライトピアノにおいて、通常演奏モードと、通常演奏モードよりも音量が小さい弱音演奏モードとに、演奏モードを切替可能なシステムである。まず、弱音システム1が適用されるアップライトピアノの構成について説明する。図1は、実施形態1に係る弱音システム1が設けられたアップライトピアノのアクション機構2及びダンパー機構3の鍵盤4の並設方向から見た要部断面図である。
上記の実施形態1では、アップライトピアノの弱音システムについて説明した。しかし、本発明のピアノの弱音システムは、アップライトピアノに限らず、グランドピアノに適用してもよい。以下、本実施形態において、グランドピアノに適用される弱音システムについて説明する。
110,110a 弱音装置
111 マフラーレール
112 緩衝部材
112a 基部
112b 単音緩衝部
113 レール支持装置
114 レール駆動部
114a 操作部
114b 連結部
114c 付勢部
115 第1柱部材
116 第2柱部材
117 連結部
118 基材
120,120a レットオフ切替装置
121 帯状部材
122 支持部材
123 重り
124 連結部材
131 第1帯状部材
132 第1支持部材
133 第1重り
134 第1連結部材
135 ベアリング
136 ケース136
137,138 調整部材
141 第2帯状部材
142 第2支持部材
143 第2重り
144 第2連結部材
145 ベアリング
146 ケース
147,148 調整部材
150 固定装置
151 支持面
152 固定面
153 取付部材
154 ボルト
155 ナット
156 第1ストッパ
157 第2ストッパ
161 ワッシャー
162 ネジ
2,2a アクション機構
210 ウィペン
211 ウィペンフレンジ
212 ウィペンヒール
213 ジャックフレンジ
214 ジャックスプリング
220 ジャック
221 第1腕部
222 第2腕部
230 レギュレーティングボタン
231 レギュレーティングレール
232 ストッパ
240 バット
250 ハンマー
251 ハンマーヘッド
252 ハンマーシャンク
253 ハンマーローラ
254 シャンクフレンジ
255 ドロップスクリュー
260 レピティションレバー
261 レピティションフレンジ
262 レピティションスプリング
263 レピティションレザー
3,3a ダンパー機構
31 ダンパーレバー
32 ダンパーワイヤー
33 ダンパーヘッド
34 ダンパーフレンジ
35 ダンパースプリング
36 ダンパースプーン
37 ダンパーブロック
4 鍵盤
41 キャプスタンボタン
5 弦
6 アクションレール
7 ハンマーレール
8 ウィペンレール
9 ダンパーレール
10 筬
1100 ブラケット
1110 ネジ
Claims (7)
- ハンマーが直接弦を打撃する通常演奏モードと、前記ハンマーが緩衝部材を介して打撃する弱音演奏モードと、に切替可能であり、弱音装置と、レットオフ切替装置と、から構成されるアップライトピアノの弱音システムであって、
前記弱音装置は、
前記弱音演奏モードにおいて、前記ハンマーが前記弦を打撃する際に、前記ハンマーと前記弦との間に介在する第1緩衝部材位置と、前記通常演奏モードにおいて、前記ハンマーが前記弦を打撃する際に、前記ハンマーと前記弦との間に介在しない第2緩衝部材位置と、の間を移動可能な緩衝部材と、
前記緩衝部材を支持し、前記緩衝部材とともに移動可能なレールと、
前記緩衝部材が前記第1緩衝部材位置と前記第2緩衝部材位置との間を移動するように、前記レールを駆動する駆動部と、を備え、
前記レットオフ切替装置は、
前記弱音演奏モードにおいて、前記ピアノに設けられた複数のアクション機構のレギュレーティングボタンとジャックとの間にまたがって位置する第1帯状部材位置と、前記通常演奏モードにおいて、前記ピアノに設けられた複数のアクション機構のレギュレーティングボタンとジャックとの間に位置しない第2帯状部材位置と、の間を移動可能な帯状部材と、
前記帯状部材の、前記複数のアクション機構の並列方向における両端部を支持し、前記帯状部材とともに移動可能な少なくとも1組の支持部材と、を備える、
ことを特徴とするアップライトピアノの弱音システム。 - 前記レールと前記1組の支持部材とが連動するように、前記レールと前記1組の支持部材とを連結する連結部材をさらに備える、
ことを特徴とする請求項1に記載のアップライトピアノの弱音システム。 - ハンマーが直接弦を打撃する通常演奏モードと、前記ハンマーが緩衝部材を介して打撃する弱音演奏モードと、に切替可能であり、弱音装置と、レットオフ切替装置と、から構成されるグランドピアノの弱音システムであって、
前記弱音装置は、
前記弱音演奏モードにおいて、前記ハンマーが前記弦を打撃する際に、前記ハンマーと前記弦との間に介在する第1緩衝部材位置と、前記通常演奏モードにおいて、前記ハンマーが前記弦を打撃する際に、前記ハンマーと前記弦との間に介在しない第2緩衝部材位置と、の間を移動可能な緩衝部材と、
前記緩衝部材を支持し、前記緩衝部材とともに移動可能なレールと、
前記緩衝部材が前記第1緩衝部材位置と前記第2緩衝部材位置との間を移動するように、前記レールを駆動する駆動部と、を備え、
前記レットオフ切替装置は、
前記弱音演奏モードにおいて、前記ピアノに設けられた複数のアクション機構のレギュレーティングボタンとジャックとの間にまたがって位置する第1帯状部材位置と、前記通常演奏モードにおいて、前記複数のアクション機構のレギュレーティングボタンとジャックとの間に位置しない第2帯状部材位置と、の間を移動可能な第1帯状部材と、
前記弱音演奏モードにおいて、前記複数のアクション機構のドロップスクリューとレピティションレバーとの間にまたがって位置する第3帯状部材位置と、前記通常演奏モードにおいて、前記複数のアクション機構のドロップスクリューとレピティションレバーとの間に位置しない第4帯状部材位置と、の間を移動可能な第2帯状部材と、
前記第1帯状部材の、前記複数のアクション機構の並列方向における両端部を支持し、前記第1帯状部材とともに移動可能な少なくとも1組の第1支持部材と、
前記第2帯状部材の、前記複数のアクション機構の並列方向における両端部を支持し、前記第2帯状部材とともに移動可能な少なくとも1組の第2支持部材と、を備える
ことを特徴とするグランドピアノの弱音システム。 - 前記レールと、前記1組の第1支持部材及び前記1組の第2支持部材とが連動するように、前記レールと、前記1組の第1支持部材及び前記1組の第2支持部材とを連結する連結部をさらに備える、
ことを特徴とする請求項3に記載のグランドピアノの弱音システム。 - 前記弱音装置及び前記レットオフ切替装置は、前記複数のアクション機構を支持するブラケットに固定される、
ことを特徴とする請求項3または4に記載のグランドピアノの弱音システム。 - ハンマーが直接弦を打撃する通常演奏モードと、前記ハンマーが緩衝部材を介して打撃する弱音演奏モードと、に切替可能なピアノに用いられる支持装置であって、
他の前記支持装置とともに、前記ピアノに設けられた複数のアクション機構の並列方向と略平行に延びる帯状部材の両端部を支持する支持部と、
前記複数のアクション機構の並列方向と略平行な回転軸を中心として前記支持部と回転させる回転部と、を備え、
前記帯状部材を、前記弱音演奏モードにおいて、前記ピアノに設けられた複数のアクション機構のレギュレーティングボタンとジャックとの間にまたがって位置する第1帯状部材位置と、前記通常演奏モードにおいて、前記ピアノに設けられた複数のアクション機構のレギュレーティングボタンとジャックとの間に位置しない第2帯状部材位置と、の間で移動させる、
ことを特徴とする支持装置。 - ハンマーが直接弦を打撃する通常演奏モードと、前記ハンマーが緩衝部材を介して打撃する弱音演奏モードと、に切替可能なグランドピアノに用いられる支持装置であって、
他の前記支持装置とともに、前記グランドピアノに設けられた複数のアクション機構の並列方向と略平行に延びる帯状部材の両端部を支持する支持部と、
前記複数のアクション機構の並列方向と略平行な回転軸を中心として前記支持部を回転させる回転部と、を備え、
前記帯状部材を、前記弱音演奏モードにおいて、前記複数のアクション機構のドロップスクリューとレピティションレバーとの間にまたがって位置する第1帯状部材位置と、前記通常演奏モードにおいて、前記複数のアクション機構のドロップスクリューとレピティションレバーとの間に位置しない第2帯状部材位置と、の間で移動させる、
ことを特徴とする支持装置。
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CN110047453A (zh) * | 2019-04-26 | 2019-07-23 | 南阳理工学院 | 一种用于具有声学和静音模式的钢琴的琴槌止动器 |
CN111667801A (zh) * | 2020-07-16 | 2020-09-15 | 张晓轩 | 一种三角钢琴的琴盖缓冲装置 |
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CN105632462B (zh) * | 2016-01-12 | 2020-11-20 | 森鹤乐器股份有限公司 | 一种立式钢琴击弦机组装方法 |
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CN111667801A (zh) * | 2020-07-16 | 2020-09-15 | 张晓轩 | 一种三角钢琴的琴盖缓冲装置 |
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