JP2003015631A - Silencer for silent piano - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a silencer for a silent piano which is capable of obtaining an advance and retreat quantity without increasing the moving quantity in the lateral direction of a stopper member in switching playing by relatively simple constitution. SOLUTION: This silencer 20 for the silent piano enables a player to make playing by switching to the ordinary playing that hammers 2 turning by accompanying the key touch of a keyboard 17 strike strings 18 and the silent playing that the striking of the hammers 2 are obstructed by advancing freely advanceable and retractable stopper members 21 into the turning range of hammer shanks 5. The device has a base section 29 which is provided with a fulcrum shaft 24, a pair of first links 23 which are freely turnably supported at their central parts by the fulcrum shaft 24 and are freely turnably connected at the one-side ends to the stopper member 21 and wall sections 27a which push out the respective first links 23 to the stopper member 21 side in the state of the abutting the other ends of the respective first links 23 when the respective first links 23 turn around the fulcrum shaft 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a muffling device for a mute piano that can be played by switching between normal performance and mute performance.

[0002]

2. Description of the Related Art In a mute piano, a muffler is used to switch between a normal performance and a mute performance. In the normal performance, the hammer strikes the strings as the keys are pressed, whereas in the silent performance, the stopper member of the silencer is inserted between the hammer and the strings to prevent the hammer from striking the strings. The key press information is detected by the detection means, and an electronic sound based on the detected key press information is generated and output to the headphones.

A conventional silencer for an upright silencer piano is shown in FIG. 6, for example. The silencer 51 includes a stopper rail 52 as a stopper member extending in the left-right direction and links 53, 53 connected to both ends thereof. Each link 53
One end of the is rotatably connected to the stopper rail 52 via a stopper connecting portion 54. The other end is rotatably connected to a base (not shown) via a base connecting part 55. A wire 56 is connected to one of the links 53, and a pulling force acts on the wire 56 in the direction of the arrow in the figure in conjunction with the operation of a pedal (not shown). Further, a return spring 57 is connected to the other link 53,
The link 53 is biased in the direction opposite to the tensile force of the wire 56.

With the above-described structure, when the mute is played, the wires 56 are pulled in conjunction with the operation of the pedals, whereby the links 53 rotate clockwise around the base connecting portion 55. . Accordingly, the stopper connecting portion 54
The stopper rail 52 connected via the pin also moves to the lower side (hammer side) in the figure. In this way, the stopper rail 52 enters the rotation range of the hammer shank (not shown), and the hammer shank comes into contact with the stopper rail 52,
Block the striking of a hammer (not shown). Further, during normal playing, when the pedal operation is released, each link 53 is rotated counterclockwise in the figure by the urging force of the return spring 57, and the stopper rail 52 is also moved by the hammer. Retract from the turning range.

As a conventional silencer for a grand type silencer piano, for example, one disclosed in Japanese Patent Laid-Open No. 16155/1996 is known. This silencer 61
7A, as shown in FIG. 7A, a stopper rail 62 as a stopper member that extends in the left-right direction, and a support rail 63 that supports the stopper rail 62 in a suspended state,
It is configured by a pair of support links 64, 64 connected to the stopper rail 62 and the support rail 63. Return springs 65, 65 are provided on the stopper rail 62. The support rail 63 is fixed to the piano body (not shown). Further, in order to limit the movement of the stopper rail 62 only in the vertical direction, a pair of guide shafts 68, 68 are attached so as to penetrate the support rail 63 and the stopper rail 62, and the return spring 65 is attached to each guide shaft 68. Is installed. Each support link 64
Is composed of an upper link 64a and a lower link 64b, one end of the upper link 64a is rotatably connected to the support rail 63, and one end of the lower link 64b is a stopper rail 62.
Is rotatably connected to. The other ends of the upper link 64a and the lower link 64b are connected to each other via a connecting portion 64c. Further, the wire 6 is attached to the connecting portion 64c.
One end of the wire 67 is fixed, and the other end of the wire 67 is connected to a pedal (not shown).

With the above-described structure, when playing a mute, the wire 6 is interlocked with the operation of the pedal as shown in FIG.
When 7 is pulled, each support link 64 is
It extends against the biasing force of the return spring 65. In this case, each upper link 64a rotates clockwise in the drawing around the connection point on the support rail 63 side, and each lower link 64b moves in the connecting portion 6a.
While moving counterclockwise in the figure around 4c, it moves downward in the figure. Accordingly, the stopper rail 62 connected to each lower link 64b moves to the lower side (hammer side) in the figure while being guided by the guide shafts 68, 68. In this way, the stopper rail 62 enters the rotation range of the hammer shank (not shown) and abuts the hammer shank to prevent the hammer (not shown) from striking the strings. Further, during normal performance, the pedal 67 is released, and the pulled wire 67 returns to its original state due to the urging force of the return spring 65. By the operation opposite to the above, the original bent state is restored. Along with that, the stopper rail 62 also moves to the upper side in the drawing, and retracts from the range of rotation of the hammer.

[0007]

However, FIG. 6 described above is used.
In the muffler 51, the component of the movement amount of the stopper connecting portion 54 on the other end side when the links 53 rotate around the base connecting portion 55 on the one end side in the direction toward the stopper rail 52 is It is only obtained as the amount of advance / retreat of the stopper rail 52. Therefore, there is a problem that a sufficient amount of advance / retreat of the stopper rail 52 cannot be secured. In this case, if the portion of the link 53 closer to the base connecting portion 55 is pulled, the amount of advancement / retraction of the stopper rail 52 increases, but the pulling force of the wire 56 also increases, resulting in a heavy pedal. Further, if the length of each link 53 is increased, the amount of advance / retreat of the stopper rail 52 increases,
In this case, since the amount of movement of the stopper rail 52 in the left-right direction also increases, it hits a bracket for supporting an action, which is installed close to both sides of the stopper rail 52. Therefore, it is actually necessary to lengthen the link 53. It's difficult.

Further, in the conventional silencer 61 of FIG. 7, each support link 64 has an upper link 64a and a lower link 64.
Since the stopper rail 62 moves forward and backward due to the extension of the links 64a and 64b due to the rotation of both links 64a and 64b, a relatively large forward and backward movement amount can be secured. Further, the stopper rail 62 has an advantage that it moves only in the vertical direction and does not move in the horizontal direction. However, in order to move the stopper rail 62 only in the vertical direction, the guide shaft 68 and the like are not supported.
3 and the stopper rail 62 must be provided so as to penetrate therethrough, so that a large number of parts are required and the structure becomes complicated.

The present invention has been made in order to solve the above problems, and has a relatively simple structure, which is sufficient without increasing the lateral movement amount of the stopper member at the time of switching the performance. It is an object of the present invention to provide a sound deadening device for a sound deadening piano that can achieve a large amount of advance and retreat.

[0010]

In order to achieve this object, the present invention provides a normal performance in which a hammer having a hammer shank strikes a string, which rotates with the depression of a keyboard.
A silencer for a mute piano that can be played by switching to a mute performance that prevents the hammer from striking a string by entering a stopper member that can move back and forth within the range of rotation of the hammer shank. A base member provided with a shaft, a pair of first links whose central portion is rotatably supported by a fulcrum shaft, and one end of which is rotatably connected to a stopper member, and a pair of first links are provided. And a wall portion that pushes out the pair of first links toward the stopper member when the other end portions of the pair of first links are in contact with each other when rotating about the fulcrum shaft. .

According to this muffling device for a muffler piano, when the pair of first links are pulled by wires, for example, the first links rotate about the fulcrum shaft while keeping the other ends in contact with the wall. By doing so, it is pushed out toward the stopper member side by the wall portion. Then, as the first links are pushed out, the stopper members connected to them are also moved to the hammer shank side accordingly. Therefore, the first
Since the link is pushed out by the wall portion, compared to the conventional case in which the stopper member is advanced and retracted by the rotation of only the link,
The amount of advance / retreat of the stopper member can be increased. Further, since it is not necessary to lengthen the first link, it is possible to secure a sufficient forward / backward movement amount without increasing the lateral movement amount of the stopper member. Further, as the parts, in addition to the stopper member, the base member, the pair of first links and the wall portion may be sufficient, so that the number of parts is small and the structure is simple as compared with the conventional silencer of FIG. 7.

In the above, it is preferable that the base member further includes a pair of rotatably provided second links, and a fulcrum shaft is provided at each of the pair of second links.

According to this structure, as the pair of first links rotate about the fulcrum shaft, the pair of second links provided with the fulcrum shaft are pushed by the wall portion via the respective first links. By the rotation, the fulcrum shaft moves to the stopper member side, so that the first link can be moved to the stopper member side accordingly. Therefore, by the amount of movement of the fulcrum axis,
By increasing the amount of advance / retreat of the stopper member, a sufficient amount of advance / retreat can be obtained. Also, the first via the second link
Since the link is moved, the stopper member can be smoothly advanced and retracted.

In the above description, it is preferable that the pair of first links be formed with elongated holes extending in the length direction thereof and engaging with the fulcrum shaft.

According to this structure, when the other end of each first link is pushed by the wall portion as the pair of first links rotate, each first link moves along the elongated hole. The length corresponding to the length is pushed to the stopper member side. Therefore, since the amount of advance / retreat of the stopper member is increased by the length of the long hole, a sufficient amount of advance / retreat can be obtained. Further, since the pair of second links in claim 2 can be omitted and only the elongated hole needs to be formed in the first link, the configuration can be simplified.

In the above, it is preferable that the wall portion is attached to the base member so that the position of the wall portion can be adjusted in the advancing / retracting direction of the stopper member.

According to this structure, by making the position of the wall portion adjustable with respect to the base member, the amount of movement of the first link pushed out to the wall portion can be adjusted, and therefore the amount of advance / retreat of the stopper member can be adjusted. can do.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 shows a keyboard device of an upright type silencer piano to which the silencer of the present invention is applied. This keyboard device comprises a large number of keyboards 17 (only one is shown) and action 1. It should be noted that the figure shows a state in which the keyboard 17 is released during a mute performance, and some parts such as dampers are omitted.

This action 1 comprises a wippen 14, a jack 10 and a hammer 2 (only one of which is shown) provided for each keyboard 17. The wippen 14 is mounted on a keyboard 17 via a capstan screw 15, and its rear end is rotatably supported by the center rail 13. A regulating rail 11 is provided at the front end of the center rail 13, and a regulating button 12 is attached to the lower surface of the regulating rail 11.

The jack 10 is formed in an L-shape having a push-up portion 10a and an engaging portion 10b. The jack 10 is rotatably attached to the wippen 14. Further, a jack spring 10 c is provided between the engaging portion 10 b of the jack 10 and the wippen 14.

The hammer 2 is attached to a bat 6, a hammer shank 5 extending upward from the bat 6, a hammer wood 4 extending laterally from the hammer shank 5 toward the chord 18 side, and a tip of the hammer wood 4. It is composed of a hammer felt 3. Hammer 2
The butt 6 is rotatably attached to the center rail 13. In the key release state shown in the drawing, the tip of the push-up portion 10a of the jack 10 is engaged with the butt 6. Then, the hammer shank 5 is in contact with the hammer rail 7 at an angle, and the hammer felt 3 has the strings 18
Is facing the. Further, a catcher 8 extends forward from the bat 6, and a back check 9 is provided upright from the wippen 14 so as to face the catcher 8.

Further, the muffling device 20 according to the present invention is a string 1
8 is provided between the hammer shank 5 and the hammer shank 5, and moves the stopper rail 21 (stopper member) back and forth between a rear retracted position (solid line) and a front approached position (broken line). As shown in FIGS. 2 and 3, the muffler 20 includes the stopper rail 21, a pair of first links 23 and 23 connected to both ends of the stopper rail 21, and a base 29 as a base member. There is.

The stopper rail 21 extends in the left-right direction and is rotatably connected between the stopper connecting portions 22 and 22 at the front ends of the first links 23 and 23. Also,
The stopper rail 21 has an L-shaped cross section, and a cushion 21a made of felt or urethane rubber is attached to the front surface.

The center of each of the first links 23 is rotatably supported by the fulcrum shaft 24, and the front end thereof is rotatably connected to the stopper rail 21 via the stopper connecting portion 22. ing. Also, one stopper connecting portion 22
Extends downward through the first link 23, and the lower end portion thereof forms the wire connecting portion 32.
A wire 31 is connected to 2. The wire 31 is connected to a pedal (not shown) of the piano, and when the pedal is operated and locked in a notch (not shown) of the pedal case, the wire 31 is moved by a predetermined amount in the direction of the arrow in the figure. , Is being pulled. Further, a return spring 33 (shown in FIG. 3) is coupled to the other stopper connecting portion 22, and the wire 3
Each first link 23 is biased in the direction opposite to the tensile force of 1.

The base 29 is formed by pressing an iron plate or the like, and includes a bottom wall 29a, a front wall 29b extending upward from its front end, and an upper wall 29 extending rearward from its upper end.
It is composed of c and is formed in a U shape in cross section.
In addition, a wall member 27 having an L-shaped cross section is provided at the rear end of the upper wall 29c.
Is attached.

The wall member 27 extends in the left-right direction of the base 29, and a first link contact portion 27a (wall portion) for pushing each first link 23 to the stopper rail 21 side, and a first link wall contact. It is composed of a mounting portion 27b extending vertically forward from the lower end of the portion 27a. The attachment portion 27b has a plurality of elongated holes 35 extending in the front-rear direction (only one is shown).
Are formed. The wall member 27 is attached to the upper wall 29c of the base 29 with the attaching screw 28 that is passed through the elongated hole 35. Therefore, the attachment position of the first link contact portion 27a can be adjusted in the front-rear direction by the length of the long hole 35.

On the upper wall 29c of the base 29, a pair of second
One ends of the links 25, 25 are rotatably attached via a base connecting portion 26, and a fulcrum shaft 24 is provided at the other end of each second link 25 so as to project upward. In addition, the base connecting portion 26, via the base 29,
It is provided at the upper end of a rotary shaft 30 extending between the upper wall 29c and the bottom wall 29a. As mentioned above, this fulcrum shaft 2
4, the central portion of each first link 23 is rotatably supported.

Next, the operation of the muffling device 20 having the above structure will be described.
This will be described with reference to FIG. During normal playing, the silencer 20 is in the state shown in FIG. 4A due to the urging force of the return spring 33 due to the release of the pedal operation. That is, each second link 25 is parallel to the first link contact portion 27a of the wall member 27, and each first link 23 has its rear end portion in contact with the first link contact portion 27a. The stopper rail 21 is retracted rearward with the oblique posture.

On the other hand, at the time of mute play, when the pedal is operated from the above-mentioned state, the wire 31 is interlocked with the pedal operation.
It is pulled in the direction of the arrow in the figure. As shown in FIG. 6B, each first link 23 is
Rotates about the fulcrum shaft 24 in the clockwise direction in the figure. At that time, since the rear end portion of the first link 23 is in contact with the first link contact portion 27a of the wall member 27, the first link 23 is
It is pushed forward by the first link contact portion 27a.
Along with this, the second link 25 connected to the first link 23 via the fulcrum shaft 24 rotates around the base connecting portion 26 toward the stopper rail 21 side. In this way, the first link 23 rotates while being pushed forward by the first link contact portion 27a. Accordingly, the stopper rail 21
The movement amount of the first link 23 enters the rotation range of the hammer shank 5. Then, the hammer shank 5 comes into contact with the stopper rail 21 to prevent the hammer felt 3 from striking the strings.

As described above, according to this embodiment, when the stopper rail 21 is inserted, the first link 23 is
Since the stopper rail 21 is rotated while being pushed out by the first link abutting portion 27a, the stopper rail 21 is moved forward and backward by the amount of the pushing out by the first link abutting portion 27a, whereby the stopper rail 21 is advanced and retracted by the rotation of only the link. The amount of advance / retreat can be increased. Further, by adjusting the mounting position of the wall member 27, it is possible to obtain an appropriate amount of advance / retreat of the stopper rail 21. Further, since it is not necessary to lengthen the first link 23, it is possible to secure a sufficient amount of advance / retreat without increasing the amount of lateral movement of the stopper rail 21. Furthermore, as the parts, the stopper rail 21, the pair of first links 23, the pair of second links 25, the wall member 27, and the base 29 may be mainly used, so that the number of parts is relatively small and the structure is simple. . Also, the second
Since the first link 23 is moved via the link 25,
The stopper rail 21 can be smoothly advanced and retracted.

FIG. 4 shows a silencer 20 according to a second embodiment of the present invention. Compared with the above-mentioned embodiment, the present invention omits the second link 25, forms the elongated hole 34 in the central portion of each first link 23, and integrates the fulcrum shaft 24 with the upper wall 29c of the base 29. Only the points provided in. All other configurations are the same as in the first embodiment. The elongated hole 34 extends in the length direction of the first link 23 and has a predetermined length (between the front edge 34a and the rear edge 34b).

Next, the operation of the muffling device 20 having the above structure will be described.
This will be described with reference to FIG. During normal playing, the silencer 20 is in the state shown in FIG. 4A due to the urging force of the return spring 33 due to the release of the pedal operation. That is, each of the first links 23 is in an inclined posture with respect to the rear end of the first link 23 in contact with the first link contact portion 27a, and the fulcrum shaft 24 has the front edge 34a of the elongated hole 34.
Is in contact with. Accordingly, the stopper rail 21
It is retracting to the rear.

On the other hand, when the wire 31 is pulled in the direction of the arrow in the figure in accordance with the pedal operation from the above-mentioned state during the mute performance, as shown in FIG. Rotates about the fulcrum shaft 24 in the clockwise direction in the figure. At this time, similarly to the first embodiment, the first link 23
Are extruded by the first link contact portion 27a. in this case,
The first link 23 is pushed out by the first link contact portion 27a, and at the same time, the length of the elongated hole 34 with which the fulcrum shaft 24 engages, that is, the fulcrum shaft 24 is rearward from the front edge 34a of the elongated hole 34. Move forward until it abuts the edge 34b. Along with this, the stopper rail 21 also moves forward by the length of the elongated hole 34.

Therefore, according to this embodiment, it is possible to obtain the same effects as the above-described first embodiment. In addition, in the present embodiment, the second in the first embodiment is used.
Since the link 25 can be omitted and only the elongated hole 34 needs to be formed in the first link 23, the structure can be simplified. Furthermore, by changing the length of the long hole 34, it is possible to easily adjust the amount of advance / retreat of the stopper rail 21.

The present invention is not limited to the embodiment described above and can be implemented in various modes.
For example, in the embodiment, the present invention is applied to the upright silencer piano, but instead of this, it may be applied to a grand silencer piano. Further, in the first and second embodiments, the wall material 27 is attached so as to extend in the left-right direction along the base 29, but as another example, the first
The length may be shortened and provided only in the portion where the link 23 is pushed out. Even in this case, since the first link 23 can be pushed out, a sufficient amount of advance / retreat of the stopper rail 21 can be obtained.

[0036]

As described above in detail, the sound deadening device for a sound deadening piano according to the present invention has a relatively simple structure, and does not increase the movement amount of the stopper member in the left-right direction at the time of switching the performance. It is possible to obtain a large amount of advance / retreat.

[Brief description of drawings]

FIG. 1 is a side view showing a keyboard device of an upright type sound deadening piano to which a sound deadening device according to an embodiment of the present invention is applied.

FIG. 2 is a perspective view showing the silencer according to the first embodiment of the present invention.

FIG. 3 is a plan view showing the operation of the silencer according to the first embodiment of the present invention.

FIG. 4 is a perspective view showing a silencer according to a second embodiment of the present invention.

FIG. 5 is a plan view showing the operation of the silencer according to the second embodiment of the present invention.

FIG. 6 is a plan view showing a conventional silencer for a general upright type silencer piano.

FIG. 7 is a plan view showing a conventional silencer of a general ground type silencer piano.

[Explanation of symbols]

2 hammer 5 hammer shank 17 keyboard 18th string 20 silencer 21 Stopper rail (stopper member) 23 First Link 24 fulcrum axis 25 Second Link 27a 1st link contact part (wall part) 29 Base (base member) 34 long hole

Claims (4)

[Claims] 1. A normal performance in which a hammer having a hammer shank, which rotates in response to a key press on a keyboard, strikes a string,
A sound deadening device for a sound deadening piano, which is capable of playing by switching a stopper member that can move forward and backward within the turning range of the hammer shank into the turning range to switch the sounding performance to block the striking of the hammer. And a base member provided with a fulcrum shaft, and a central portion rotatably supported by the fulcrum shaft,
A pair of first links one end of which is rotatably connected to the stopper member, and the other ends of the pair of first links when the pair of first links rotate about the fulcrum shaft. And a wall portion that pushes out the pair of first links to the stopper member side in a state of being brought into contact with each other. 2. The base member further includes a pair of second links rotatably provided, and the fulcrum shaft is provided in each of the pair of second links. 1. A sound deadening device for a sound deadening piano according to 1. 3. The sound deadening piano according to claim 1, wherein the pair of first links are formed with a long hole extending in a length direction thereof and engaged with the fulcrum shaft. apparatus. 4. The sound deadening piano according to claim 1, wherein the wall portion is attached to the base member so that the position of the stopper member can be adjusted in the advancing / retreating direction of the stopper member. Silencer.