JP3823999B2 - Silencer for keyboard instrument and keyboard instrument - Google Patents

Description

  The present invention relates to a keyboard instrument having an action mechanism that operates in conjunction with a keyboard and strikes a string, and a muffler thereof, and more particularly, a normal performance in which a string is hit with a hammer, and a hammer that strikes a string by stopping the hammer immediately before the string is hit. The present invention relates to a silencer for a keyboard instrument such as a grand piano and a keyboard instrument that can selectively switch between non-percussion performance (mute performance).

  Keyboard instruments such as grand pianos and upright pianos that strike strings with an action mechanism that operates in conjunction with key pressing operations on the keyboard are equipped with a weak sound mechanism that selectively reduces the performance volume because the performance volume is high. ing. In the case of a grand piano, in the case of a grand piano, a pedal operation is used to move the entire action mechanism together with the keyboard casket in the direction in which the keyboards are juxtaposed, thereby reducing the number of strings that the hammer strikes, thereby reducing the performance sound. On the other hand, in an upright piano, the muffler felt is selectively interposed between the string and the hammer by operating the pedal, or the hammer rail that locks the hammer assembly in the initial position is moved to the string side, and the string and the hammer are moved. By shortening the distance, the hammer's striking power against the strings is weakened, and the performance sound is weakened.

  Recently, along with the diversification of musical instruments, a keyboard musical instrument has been proposed in which a string-sounding sound is not generated completely only by a key pressing operation (see, for example, Patent Document 1). In the keyboard musical instrument described in Patent Document 1, the hammer assembly is lifted in advance and the hammer roller is separated from the jack during a mute performance that does not generate a string sound in a grand piano, and the jack does not push up the hammer assembly during a key pressing operation. By doing so, it is possible to realize a performance (mute performance) in which the hammer does not strike the string and does not generate a string sound. In addition, by incorporating sensors such as key sensors and hammer sensors used in an automatic performance piano into such a keyboard instrument, the performance of an acoustic (raw) piano during normal performance (including weak performance) that does not mute. In the mute performance, it is possible to enjoy the performance of the electronic piano that generates the electronic sound by controlling the musical tone control circuit with the sensor.

However, the above-mentioned conventional keyboard instrument lifts the hammer assembly in advance when performing a mute performance without striking the string, so the jack does not push up the hammer assembly even when a key is pressed, so there is a feeling of aftertouch and resistance during normal performance. There was a drawback that it could not be obtained.
Note that aftertouch in a narrow sense refers to the feeling of “clicking” when Jack temporarily escapes from the bottom of the hammer roller. In a broad sense, it refers to a series of movements including let-off (a movement in which a hammer rotates near a string and returns without touching it).

Therefore, as a method for solving such a problem, the applicant of the present invention has a blocking means for selectively blocking a string hit by a hammer assembly, and operates between the blocking means and between the regulating button and the small jack. And a spacer that is selectively inserted between the small jack and the regulating button during mute performance, so that the jack escapes from the hammer assembly earlier than during normal performance. A keyboard instrument has already been proposed that prevents the hammer assembly from striking with a blocking means so that it can be switched between a mute performance that does not generate a string sound and a normal performance without disturbing the aftertouch feeling (for example, , See Patent Document 2).
However, in such a keyboard instrument, the same thickness spacer is inserted between the small jack and the regulating button for every key during muting performance. There was a problem that the relative relationship between the ching button and the small jack could not be maintained. That is, when a small jack hits a spacer during mute performance, this spacer is compressed and its thickness changes, and since it is a uniform spacer with a certain rigidity, it has a certain rigidity, so the influence of the left and right keys In response, the relative relationship between the small jack and the regulating button also changes. As a result, the aftertouch feeling during the mute performance cannot be maintained as in the normal performance.
US Pat. No. 2,250,065 Japanese Patent Application No. 4-215400 (Japanese Patent Laid-Open No. 06-035445)

  The present invention has been made in view of the above-described conventional problems, and the object of the present invention is to obtain a stable stringing operation and to quickly switch between normal performance and mute performance. The object is to provide a silencer for a keyboard instrument and a keyboard instrument.

In order to achieve the above object, a first invention is a silencer provided in a keyboard instrument that strikes a string by a hammer assembly that operates in conjunction with a key pressing operation of the keyboard, and is provided between the string and the hammer assembly. A string striking prevention means that prevents the hammer assembly from rotating during normal performance, and prevents the hammer assembly from rotating immediately before the hammer strikes during mute performance. Correspondingly, a stopper member that is transversely extended in the direction in which the strings are arranged, and a cushion member that is provided on a collision surface of the stopper member that rotates when the hammer assembly is struck, And switching means for switching from the normal performance state to the mute performance state or vice versa by moving the stopper member in the string arrangement direction. It is characterized in.
According to a second aspect of the present invention, the string striking prevention means includes a shaft, a bearing member for holding the shaft, and a fixing means for fixing the bearing member to the keyboard instrument, and the switching means includes the keyboard instrument. A transmission means connected to an operation section provided in the transmission means for transmitting a driving force for moving the string striking prevention means, and a holding means for holding the movement means so that the driving force can be transmitted. And a holding means for fixing the holding means to the keyboard instrument.
According to a third aspect of the present invention, there is provided a changing means for changing the time when the jack escapes during the mute performance between the normal performance and the mute performance state.
According to a fourth aspect of the invention, the switching means operates the string striking prevention means and the changing means in conjunction with each other.
Further, a keyboard instrument according to a fifth aspect of the present invention is a normal musical instrument which is arranged between a string, a key, a hammer assembly which strikes the string in accordance with the operation of the key, and between the string and the hammer assembly. A string striking prevention means that sometimes prevents the hammer assembly from turning immediately before the hammer hits the string during the mute performance. A stopper member that extends in a transverse direction, and a cushion member provided on a collision surface of the stopper member that rotates when the hammer assembly is struck, and moves the stopper member in the string arrangement direction. And switching means for switching from the normal performance state to the mute performance state or vice versa.

  A silencer for a keyboard instrument and a keyboard instrument according to the present invention have a string striking prevention means disposed between a string and a hammer assembly, and a stopper member of the string striking prevention means is moved by the switching means in the string arrangement direction. The normal performance state and the mute performance state are switched so that the string striking prevention means does not prevent the hammer from rotating during normal performance, and the hammer assembly is prevented from rotating immediately before the hammer strikes the string during mute performance. So you can enjoy normal performance and mute performance. Further, it is only necessary to move the stopper member only in the string arrangement direction, and since there is no movement of the stopper member in the stringing direction by the hammer, there is no possibility of hindering the rotation of the hammer.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.
FIG. 1 is a side sectional view of an action mechanism section showing an embodiment of a keyboard instrument silencer according to the present invention during normal performance, FIG. 2 is a perspective view of a string striking prevention means and its switching means, and FIG. FIG. 4 is a side sectional view showing a state in which the regulation assembly is switched to the mute performance state. In these drawings, a keyboard bowl 2 is arranged on the shelf board 1, and all the keyboards 4 corresponding to the strings 3 of each pitch are arranged on the shelf board 1 by the balance key pin 5 at the substantially central portion thereof. It is supported and arranged to be swingable up and down. Each string 3 of pitches is stretched substantially horizontally on a frame (not shown) disposed above the keyboard 4 via a tuning pin and a frame pin. Below the string 3, a support rail 6 that extends in common to all the strings 3 is located above the rear end of the keyboard 4 and extends transversely. The support rail 6 is linked to the keyboard 4. An action mechanism 7 that operates and strikes the corresponding string 3 is disposed, and a damper mechanism 8 that prevents free vibration of the string 3 and releases the string 3 when the string is struck is disposed behind the action mechanism 7. .

  The support rails 6 are arranged substantially horizontally on the upper surfaces of the rear end portions of a plurality of, for example, three to four brackets 10 arranged side by side in the parallel arrangement direction of the keyboard 4 on the shelf board 1 via an action table (not shown). All the brackets 10 are connected by being fixed. Further, these brackets 10 are also connected to each other by a shank rail 11 that extends transversely on the upper surface of the front end portion so as to extend in common to all the keyboards 4. The bracket 10 is movable in the left-right direction, and the keyboard 4 is integrated with the keyboard 筬 2 by a depressing operation of a shift pedal (not shown) disposed below the shelf board 1 when playing a weak sound. Are arranged in a parallel direction, for example, to the high-pitched string side, and the number of strings 3 hit by the hammer 18 is reduced.

  The action mechanism 7 is rotated by the pressing operation of the keyboard 4, the hammer assembly 13 that strikes the string 3, and rises together with the weipen 12 in accordance with the pressing operation, and pushes and rotates the hammer assembly 13. A jack 14, a repetition lever 15 that receives and returns the hammer assembly 13 that returns to the initial position after the stringing operation, and a regulation assembly that temporarily retracts the jack 14 from the hammer assembly 13 during the stringing operation. 16 etc.

  The wipen 12 has a base end (rear end) pivotally supported by a top end of a support flange 17 fixed to the support rail 6 via a pin 18 so as to be rotatable in the vertical direction, and a free end (front end). The pen heel 12A provided integrally on the side lower surface is normally held substantially horizontally by being placed on the capstan 19 planted on the upper surface of the rear end portion of the keyboard 4. A hammer shank stop felt 20 is disposed on the upper surface of the base end of the wiper 12 via a support wood 21.

  The jack 14 is bent in an L shape when viewed from the side, and a bent portion at its lower end is pivotally supported at the front end of the wiper 12 via a pin 22 so as to be pivotable in the front-rear direction, and by a repetition spring 23 as shown in FIG. A counterclockwise turning behavior is given. One arm 14A extending upward of the jack 14 is inserted from below into a long hole 24 formed in the front end portion of the repetition lever 15 so as to penetrate the upper and lower surfaces, and its upper surface 14a (FIG. 4). Is in contact with the lower surface of the hammer roller 26 disposed on the lower surface of the base side of the hammer shank 25 constituting the hammer assembly 13. The other arm 14 </ b> B of the jack 14 extends substantially horizontally toward the front, and a front end portion thereof is positioned below the regulating assembly 16 to form a small jack 27. The jack 14 is rotated in the counterclockwise direction when a repetition button 28 attached to an intermediate portion of the one arm 14A is normally pressed by a spring force of the repetition spring 23 to a jack stop 29 planted on the wiper 12. The rotation is limited and the initial position is maintained.

  The repetition lever 15 is pivotally supported at the upper end of a repetition lever flange 31 projecting substantially from the central portion of the wiper 8 via a center pin 32 so as to be pivotable in the vertical direction, and the repetition spring 23. Thus, the counterclockwise turning behavior of FIG. 1 is given. A repetition button 33 is disposed at the rear end of the repetition lever 15 and is usually pressed against the upper surface of the base side of the wiper 12 by the spring force of the repetition spring 23, whereby the rotation of the repetition lever 15 in the counterclockwise direction. And is locked in the initial position.

  The hammer assembly 13 includes the hammer shank 25, the hammer roller 26 disposed on the lower surface of the proximal end portion of the hammer shank 25, a hammer 38 disposed on the free end of the hammer shank 25, and the like. The hammer shank 25 has a base end portion pivotally supported by a rear end of a shank flange 36 fixed to the upper surface of the shank rail 11 together with a bracket 71, which will be described later, via a pin 37 so as to be vertically rotatable. The hammer roller 26 is normally locked at the initial position by being placed on the upper surface of the front end portion of the repetition lever 15. When the pen 12 is pushed up by the capstan 19 as the key 4 is depressed, the jack 14 pushes up the hammer roller 26 from below and turns the hammer assembly 13 in the clockwise direction. As a result, the hammer 38 strikes the string 3 corresponding to the keyboard 4 on which the key is pressed. In the middle of the stringing operation, the jack 14 is rotated clockwise against the repetition spring 23 when the jack small 27 is prevented from moving upward by the regulating assembly 16, whereby the upper end of the jack 14 is hammered. Escape from the lower part of the roller 26 temporarily. At this time, the finger performing the key pressing operation receives a touch of “click”, that is, an after touch feeling, and can know that the jack 14 has escaped. Moreover, since the load of the hammer assembly 13 is eliminated by this escapement, the key pressing operation force is lightened. The escape time of the jack 14 is set when the hammer 38 approaches the string 1 to about 2 to 3 mm during normal performance. Then, after the string-striking operation, the hammer assembly 13 that is rotated and restored by the repulsive force and its own weight of the string 3 returns to the initial position when the hammer roller 26 is received by the repetition lever 15. At this time, the repetition lever 15 is pivoted clockwise against the repetition spring 23 around the center pin 32 due to the drop impact of the hammer assembly 13, thereby absorbing and mitigating the drop impact, and the hammer roller 26. It prevents bounces and enables quick hits with the same key. The jack 14 is rotated and returned in conjunction with the downward movement of the wiper 12 accompanying the returning operation of the keyboard 4 after the stringing operation by the hammer 38, so that the upper end again enters the lower portion of the hammer roller 26, and the next. Allows stringing movements.

  The regulating assembly 16 includes a regulating rail 40 (transversely extending so as to extend for each of a plurality of actions in which 88 action mechanisms 7 are grouped into a plurality of action mechanisms 7 inside the shank rail 11. 6), and a plurality of regulators arranged on the lower surface side of the regulating rail 40 so as to be adjustable in height via a regulating screw 41 corresponding to the jack small 27 of the jack 14 of each action mechanism 7. It is composed of a chin button 42. The distance d between the regulating button 42 and the jack small 27 is a distance (3 to 3) by which the jack 14 escapes from the lower portion of the hammer roller 26 when the hammer 38 approaches the string 1 to about 2 to 3 mm during normal performance. 5 mm) is set for each action mechanism 7, and when the muting performance shown in FIG. When approaching to about ˜15 mm, the jack small 27 is changed to a distance d ′ that escapes from the lower portion of the hammer roller 26. This distance d 'is about 1 to 3 mm. When the regulating button 42 is turned by hand, the regulating button 42 can be moved up and down along the regulating screw 41 to finely adjust the distance d. When the distance d is increased, the escape timing of the jack 14 is increased. Becomes slower, and on the contrary, it becomes faster when smaller.

  A back check 43 that elastically receives a hammer 38 that rotates and returns due to the repulsive force of the string 3 after the stringing operation and the weight of the hammer assembly 13 is provided on the upper surface of the rear end portion of the keyboard 4 through the back check wire 44. It is arranged.

The damper mechanism 8 is supported by a damper lever flange 51 disposed on the damper lever rail 50 so that a rear end thereof is pivotally supported through a pin 52 so as to be pivotable in the vertical direction, and a front end extends above the rear end portion of the keyboard 4. The damper lever 53 is provided, a damper block 54 disposed on the front end side of the damper lever 53, a damper 56 disposed on the damper block 54 via a damper wire 55, and the like. The damper 56 normally presses the string 3 from above to prevent free vibration of the string 3, and the damper lever 53 is pushed up by the rear end 4 a of the keyboard 4 when the key 4 is pressed. When it is rotated in the direction, it is configured to rise and be separated from the string 3. Then, after the damper 56 is separated, the hammer 38 strikes the string 3 to enable normal performance.
The action mechanism 7 and the damper mechanism 8 described above are exactly the same as the action mechanism and the damper mechanism of the conventional grand piano.

  In the present invention, there is provided a device that makes it possible to perform a mute performance that does not generate a string hitting sound without impeding the after-touch feeling during normal performance, that is, a mute device 60. The muffler 60 is disposed between the string 3 and the hammer assembly 13 and prevents the hammer assembly 13 from rotating immediately before the hammer 38 hits the string during the mute performance without blocking the hammer 38 during normal performance. The string striking prevention means 61, the string striking prevention means 61 are moved in the juxtaposition direction of the keyboard 4 to switch from the normal performance state to the mute performance state or vice versa, and the regulation assembly 16 during the mute performance. Is moved to the jack small 27 side, and distance changing means 63 for changing the distance d to d ′.

  2 and 3, the string striking prevention means 61 includes a plate-shaped hammer shank stopper 64 that extends across the action mechanism 7 so as to be movable in the juxtaposition direction of the strings 3. A reinforcing plate 65 is fixed to the lower surface of the front end portion of the hammer shank stopper 64 in order to increase the rigidity of the stopper 64, and a plurality of cushion members 66 are divided into actions on the rear end portion of the lower surface, that is, the arrangement pitch ( Are arranged in parallel at substantially the same pitch. The hammer shank stopper 64 is held by stays 67 provided at five ends in total, ie, at both ends and in the middle. The stay 67 has a pair of front and rear shafts 68A and 68B that are parallel to each other by opening the lower surface and the front and rear surfaces by forming a U-shape facing downward when viewed from the front by bending a metal plate or the like. A stopper 64 is fixed by a set screw 69. The shafts 68A and 68B are held by the bearing member 70 and the bracket 71 so as to be movable in the axial direction, that is, in the direction in which the keyboard 4 is arranged. As shown in FIG. 3, the bearing member 70 is formed in a Ω shape in a side view, and the shafts 68 </ b> A and 68 </ b> B are slidably inserted through the cylindrical cross 72 into the curved portion. The bracket 71 is fixed by a set screw 73. The bracket 71 is disposed above the action mechanism 7 corresponding to each stay 67, and its front end is fixed to the upper surface of the shank rail 11 together with the shank flange 36 by a set screw 74, and is attached to the front end. The provided bent portion 71 a is similarly fixed to the front surface of the shank rail 11 by a set screw 75, while the rear end portion is fixed to the bracket receiving member 76 by a set screw 77. The bracket receiving member 76 is disposed on the support rail 6 by a screw 78 so as to be adjustable in height. The rear end portion of the bracket 71 is bent in an L shape to form a mounting portion for the stay 67, and the vertical portions 71b and the horizontal portion 71c hold the shafts 68A and 68B. Each bearing member 70 is fixed.

  In FIG. 1, above the bracket 71, a plurality of hammer sensors 80 used at the time of mute performance are arranged corresponding to the hammer shanks 25 of the action mechanisms 7. The hammer sensor 80 includes a light emitting element and a light receiving element (not shown), and a shutter 81 disposed on the hammer shank 25 blocks light that is emitted from the light emitting element and received by the light receiving element during a stringing operation. Thus, the action mechanism 7, in other words, the movement of the keyboard 4 is detected, and an electronic sound is generated from the electronic sound source by the output signal. Since such a hammer sensor 80 is well known in the art, further explanation is omitted.

  In FIG. 2 again, the switching means 62 moves the string striking prevention means 61 to the left or right by a half pitch of the action division when switching from the normal performance state to the mute performance state or vice versa. A rotation lever 91 is provided. The rotating lever 91 is provided integrally with a shaft 93 whose intermediate portion is rotatably supported by a bearing member 92 disposed on the shank rail 11, and a rear end of the shaft 93, and includes a plurality of rotating levers 91. It is composed of one of the stays 67, for example, a plate-like operation portion 94 that is inserted and engaged from below with a stay 67 that holds the central portion of the hammer shank stopper 64. One end of a lever 95 that rotatably holds the ball 96 is fixed to the front end of the shaft 93 by a set screw 97. The ball 96 is fixed to one end of the wire 98. A ball side end portion of the wire 98 is slidably held by a wire case 100 detachably disposed at a lower end of a bracket 99 whose upper end is fixed to the shank rail 11, and the other end side is the action mechanism 7 or the like. Is led out to the outside along the lower surface of the shelf board 1 from the inside of the musical instrument main body (not shown), and is connected to the knob 101. The knob 101 is held movably back and forth by a holder 102 fixed at an appropriate position on the lower surface of the front end of the shelf board 1 and is set and held at the retracted position shown in FIG. 2 during normal performance. At this time, the operation portion 94 of the turning lever 91 is set and held substantially vertically. In this state, the hammer shank stopper 64 is set and held at the normal performance position, and the cushion member 66 is positioned between the hammer shanks 25. When the lever 101 is pulled forward by a predetermined amount by hand, the rotation lever 91 is rotated by a required angle in the counterclockwise direction in FIG. 2, thereby causing the operation unit 94 to move the stay 67 to the left by a half pitch of the action split. Each cushion member 66 is made to correspond to the hammer shank 25.

  In FIG. 1 and FIG. 4, the distance changing means 63 includes a rotating shaft 110 extending transversely in the parallel arrangement direction of the strings 3 corresponding to all the action mechanisms 7. The rotation shaft 110 is rotatably held by a bearing member 113 on the upper surface of the front end portion of the second bracket 112 provided on the front surface of the shank rail 11 via the first bracket 111.

  The first bracket 111 is formed into a shape as shown in FIG. 5 by bending a metal plate, so that a vertical front plate portion 111a, an upper plate portion 111b that is inclined forwardly and extends obliquely upward to the rear, A horizontal bottom plate portion 111c and a pair of left and right side plate portions 111d, 111e are integrally formed by screws 116, 117 screwed into screw holes 114, 115 provided in the upper plate portion 111b and the bottom plate portion 11c. The front end portion of the shank rail 11 is fixed to the upper surface and the lower end surface, and both side plate portions 111 d and 111 e are in contact with the front surface of the shank rail 11. The front ends of the screws 116 and 117 are conical, and are inserted into small conical recesses 118 and 119 formed on the top and bottom surfaces of the front end portion of the shank rail 11, respectively. Misalignment is prevented. As shown in FIG. 6, the first bracket 111 has one end for both ends of the rotating shaft 110 and each adjacent section I to IV, and two for each section I to IV. Or three, 16 in total.

  The second bracket 112 is formed in an L shape in a side view as shown in FIG. 7 by bending a metal plate, and extends forwardly connected to the vertical plate portion 112a and the front end of the vertical plate portion 112a. The horizontal plate portion 112b is integrally formed, and a set screw (not shown) is inserted into the long groove 121 formed in the vertical plate portion 112a, and the screw hole 122 provided in the front plate portion 111a of the first bracket 111 is inserted. By being screwed in, it is fixed to the front surface of the first bracket 111 that is disposed between the sections I to IV adjacent to the ends of the rotating shaft 110. Note that the section allocation for each action is determined according to the position of the piano frame.

  In FIG. 4, the bearing member 113 is disposed on each of the second brackets 112, and is formed in a Ω shape when viewed from the side, and fixed at both ends thereof is formed on the front plate 112 b of the second bracket 112. A pair of set screws 125 screwed into the screw holes 124 are fixed to the upper surface of the front end portion of the second bracket 112 and hold the rotating shaft 110 rotatably. A cylindrical bushing cloth 126 is interposed between the curved portion of the bearing member 113 and the rotation shaft 110, thereby preventing the occurrence of sliding noise during rotation.

  A plurality of holding members 130 for holding the regulating assembly 16 are disposed on the rotating shaft 110. The holding member 130 is formed into a shape as shown in FIG. 8 by bending a metal plate, whereby a horizontal base portion 130a extending in the front-rear direction and a vertical portion bent upward at the front end of the horizontal base portion 130a. 13b, a horizontal portion 130c bent forward at the upper end of the vertical portion 130b, and a rail mounting portion 130d connected upward to the rear end of the horizontal base portion 130a. The horizontal base portion 130a is The rotary shaft 110 is fixed by a set screw (not shown). For this reason, a screw mounting hole 132 is formed in the horizontal base portion 130a. Further, a wire attaching portion 134 to which one end of the wire 133 is connected is fixed to the lower surface of the rear end portion of the horizontal base portion 130a by screwing or the like, and is integrally suspended. The wire 133 constitutes an operation means for switching the regulating assembly 16 between the normal performance state and the mute performance state. Like the wire 98 of the string striking prevention means 61 described above, the wire 133 is led to the lower front end portion of the shelf board 1 and picked. 101, the string striking prevention means 61 and the distance changing means 63 are interlocked. The rail attachment portion 130d of the attachment member 130 has an upper end portion inserted into the shank rail 11 from below and is in close proximity to the rear surface of the front surface portion, and the regulating rail 40 is not shown on the rear surface side of the upper end portion. It is fixed with a set screw. Further, a pin 135 projects from the center of the upper surface of the horizontal portion 130c of the mounting member 130, and the lower end of a spring 136 that biases the mounting member 130 in the clockwise direction in FIG. . Such attachment members 130 are fixedly disposed on the rotation shaft 110 so as to correspond to the first brackets 111 disposed in the sections I to IV, respectively.

  In each of the first brackets 111 disposed in each of the sections I to IV, a third bracket 140 is disposed corresponding to the mounting member 130. The third bracket 140 is formed in a reverse L-shape in side view as shown in FIG. 9 by bending a metal plate, so that it extends forward connected to the vertical plate portion 140a and the upper end of the vertical plate portion 140a. The front plate of the first bracket 111 has a horizontal plate portion 140b integrally formed, a set screw (not shown) is inserted into a long groove 141 formed in the vertical plate portion 140a, and is provided in each section I to IV. The upper end of the spring 136 is in pressure contact with the lower surface of the front end portion of the horizontal plate portion 140b. In addition, the attachment position of the 1st-3rd bracket and the holding member 130 with respect to the rotating shaft 110 is as having shown in FIG.

  A cross 142 is fixed to the upper surface of the regulating rail 40, and this cross 142 is pressed against the lower surface of the shank rail 11 by the spring force of the spring 136 as shown in FIG. Further, the regulating rail 40 does not extend in the direction of juxtaposition of the strings 3 corresponding to all the action mechanisms 7, and is divided for each section.

  A stopper 144 that restricts the counterclockwise rotation of the mounting member 130 is disposed below the rear end of the horizontal base portion 130 a of the mounting member 130. The stopper 144 is configured by a set screw that is implanted corresponding to each mounting member 130 on a rail 145 that extends transversely in the parallel arrangement direction of the strings 3 corresponding to all the action mechanisms 7. .

Next, the operation of the silencer 60 having the above configuration will be described.
During normal performance, the knob 101 is retracted to the lower surface side of the shelf board 1, and in this state, the hammer shank stopper 64 is set and held on the treble string side, and each cushion member 66 is adjacent to the hammer shank 25 of the action mechanism 7. It is located between. Therefore, even if the key 4 is pressed in this state and the jack 14 pushes up and turns the hammer assembly 13, the hammer shank 25 abuts against the cushion member 66 and is prevented from further turning. The string 3 can be hit with the hammer 38. At this time, the regulating assembly 16 is maintained at the normal performance position shown in FIG. 1, so that the distance between the regulating button 42 and the jack small 27 is set to the distance d during normal performance. . Therefore, when the hammer assembly 13 is pushed up by the jack 14 in conjunction with the key pressing operation as described above, the jack 14 temporarily escapes from the lower portion of the hammer roller 26 during the string-striking operation, and an after-touch feeling of “click” Can be obtained.

  Next, when the knob 101 of the switching means 62 is pulled to the near side in FIG. 2 and the wire 98 is pulled, the lever 95 and the rotating lever 91 are rotated counterclockwise by a predetermined angle, and the operating portion 94 is moved to the stay 67. Is moved to the bass string side. For this reason, the hammer shank stopper 64 also moves integrally with the stay 67. Since the amount of movement of the hammer shank stopper 64 is set to a substantially half pitch of the action split as described above, each cushion member 66 is correspondingly matched with the hammer shank 25 of each action mechanism 7, so that the mute performance from the normal performance state is achieved. Switch to state.

  In this case, the description of the setting of the movement amount of the hammer shank stopper 64 is omitted. However, stoppers are provided on both sides of the hammer shank stopper 64, the pull-out amount of the knob 101 is restricted, or the shafts 68A and 68B are pivoted. Various methods such as setting the supporting bearing member 70 smaller than the width of the stay 67 and positioning the bearing member 70 in the stay 67 and thereby restricting the movement of the stay 67 are possible.

  Further, when the knob 101 is pulled forward and the wire 133 of the distance changing means 63 is pulled, the mounting member 130 rotates counterclockwise in FIG. 1 against the spring 136 and comes into contact with the stopper 144, thereby regulating. The assembly 16 descends and the distance between the regulating button 42 and the small jack 27 is changed from the distance d during the normal performance to the distance d ′ during the mute performance. FIG. 4 shows this state.

In the mute performance state, when the keyboard 4 is depressed, the action mechanism 7 operates in conjunction with this operation, and when the jack 14 moves the hammer assembly 13 up and rotates, the hammer 38 tries to strike the string 3. The jack 14 abuts against the regulating button 42 during the string-striking operation and is prevented from rising, thereby turning clockwise to escape from the lower portion of the hammer roller 26. Therefore, at this time, as in the normal performance, an after-touch feeling of “click” can be obtained.
On the other hand, the hammer assembly 13 tries to continue to rotate even after the jack 14 has escaped, but the hammer shank 25 abuts against the cushion member 66 immediately before the hammer 38 strikes the string 3, and further rotates. Therefore, the hammer 38 is rebounded without hitting the string 3 and returned to its initial position. Further, the jack 14 is also lowered in conjunction with the wiper 8, and the upper end surface reenters the lower portion of the hammer roller 26 and returns to the initial position. As a result, it is possible to perform a mute performance that does not produce a string sound.

As described above, in the keyboard instrument silencer and keyboard instrument according to the present invention, the string striking prevention means 61 is disposed between the string 3 and the hammer assembly 13 so as to be movable in the direction in which the keyboard 4 is juxtaposed. The cushion member 66 of the string striking prevention means 61 is positioned between the hammer shanks 25 of the action mechanism 7 during normal performance, and the string striking prevention means 61 is moved during the mute performance to match the cushion member 66 with the hammer shank 25. Thus, since the hammer 38 is configured to prevent the hammer shank 25 from rotating immediately before striking the string 3, it is possible to enjoy normal performance and mute performance.
Further, according to the present invention, the distance between the small jack 27 and the regulating button 42 is changed from d to d 'by lowering the entire regulating assembly 16 so that it is used for normal performance as compared with the case where a spacer is interposed. The relative relationship between the adjusted jack small 27 and the regulating button 42 does not change, so that the aftertouch feeling during the mute performance can be maintained as in the normal performance.

  In addition, the present invention includes a hammer sensor 80, which detects the movement of the action mechanism 7, controls the musical sound control circuit based on the detection signal, and generates an electronic sound from the electronic sound source. You can enjoy playing the electronic piano without losing touch, and listening to the sound at this time with headphones or sounding with a low volume from the speaker will cause noise to neighboring residents during the day and at night. There will be no pollution.

FIG. 10 is a perspective view showing another embodiment of the switching means. In this embodiment, instead of the above-described rotation lever 91, a flat stay 150 is arranged above the shank rail 11 so as to be orthogonal thereto, and by a guide (not shown), approximately half a pitch of action split in the left-right direction. A block 151 is disposed so as to be movable, and the ball 151 is rotatably held at the front end of the stay 150. The rear end is connected to the hammer shank stopper 64 to switch between the normal performance state and the mute performance state. In some cases, the stay 150 is moved to the left or right by the half pitch of the action split by the knob 101.
Other configurations are the same as those in the above embodiment.
Even in such a configuration, the string striking prevention means 61 can be moved to the normal performance position and the mute performance position as in the above embodiment.

In each of the above embodiments, the manually operated knob 101 and the wire 98 are used as the switching means 62 for moving the string striking prevention means 61. However, the present invention is not limited to this, and the pedal operation is not limited to this. Various changes such as directly moving the string striking prevention means 61, rotating the rotation lever 91 with a drive motor, and moving the stay 150 with a solenoid are possible. In the above embodiments, the string striking prevention means 61 is configured to move in the horizontal direction. However, the present invention is not limited thereto, and may be moved in the vertical direction.
Further, in the above-described embodiment, the string striking prevention means 61 and the distance changing means 63 are interlocked with the knob 101. However, the distance changing means 63 is operated during the mute performance by operating each means with a different knob. The performer may be able to select whether or not to operate.

  In the above embodiment, the operation of the distance changing means 63 is performed using the wire 133. However, the present invention is not limited to this, and as with the string striking prevention means 61, the pedal is operated. Various changes are possible, such as rotating the rotation shaft 110 directly, rotating the rotation shaft 110 by a drive motor, or rotating the mounting member 130 by drive means such as a solenoid.

It is side sectional drawing at the time of the normal performance of the action mechanism part which shows one Embodiment at the time of applying this invention to a grand piano. It is a perspective view of a string striking prevention means and a switching means. It is a sectional side view which shows the attachment structure of a string striking prevention means. It is a sectional side view which shows the state which switched the regulating assembly to the mute performance state. It is a perspective view of the 1st bracket. It is a figure for showing the positional relationship of a rotating shaft, a bracket, and an attachment member. It is a perspective view of the 2nd bracket. It is a perspective view of an attachment member. It is a perspective view of a 3rd bracket. It is a perspective view which shows other embodiment of the switching means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Shelf board, 3 ... String, 4 ... Keyboard, 6 ... Support rail, 7 ... Action mechanism, 8 ... Damper mechanism, 12 ... Wipen, 13 ... Hammer assembly, 14 ... Jack, 16 ... Regulating assembly, 25 ... Hammer Shank, 27 ... small jack, 38 ... hammer, 40 ... regulating rail, 42 ... regulating button, 60 ... silencer, 61 ... string striking prevention means, 62 ... switching means, 63 ... distance changing means, 64 ... hammer shank Stopper, 66 ... cushion member, 110 ... rotating shaft, 133 ... wire.

Claims (5)

A silencer provided in a keyboard instrument that strikes a string by a hammer assembly that operates in conjunction with a key pressing operation of the keyboard,
A string striking prevention means disposed between the string and the hammer assembly, which prevents the hammer assembly from striking during normal performance and prevents the hammer assembly from rotating immediately before the hammer strikes during mute performance. A cushion provided on a collision surface between a stopper member that extends in the direction of string arrangement corresponding to all action mechanisms and a member that rotates when the hammer assembly is struck in the stopper member. Switching means for switching from the normal performance state to the mute performance state or vice versa by moving the stopper member in the string arrangement direction,
A silencer for a keyboard instrument, comprising: The silencer for a keyboard instrument according to claim 1,
The string striking prevention means includes a shaft, a bearing member that holds the shaft, and a fixing means for fixing the bearing member to a keyboard instrument,
The switching means is connected to an operation unit provided in the keyboard instrument, and a transmission means for transmitting a driving force for moving the string striking prevention means;
Holding means for holding the transmission means so as to be movable so that the driving force can be transmitted;
Fixing means for fixing the holding means to the keyboard instrument;
A silencer for a keyboard instrument, comprising: The silencer for a keyboard instrument according to claim 1,
A silencer for a keyboard instrument, characterized by comprising changing means for changing the time at which the jack escapes between a normal performance and a mute performance state. The silencer for a keyboard instrument according to claim 3,
The switching means operates the sound striking prevention means and the changing means in conjunction with each other, and a muffler for a keyboard instrument. Strings,
Key and
A hammer assembly that strikes the string in accordance with the movement of the key;
A string striking preventing means disposed between the string and the hammer assembly, which prevents the hammer from striking during normal performance and prevents the hammer assembly from rotating immediately before the hammer strikes during mute performance; A cushion member provided on a collision surface between a stopper member that extends transversely in the direction of string arrangement corresponding to all action mechanisms, and a member that rotates when the hammer assembly is struck in the stopper member; And having
Switching means for switching from the normal performance state to the mute performance state or vice versa by moving the stopper member in the string arrangement direction;
A keyboard instrument characterized by comprising

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