JP2012053416A - Damper for grand piano - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a damper for grand pianos that permits ready adjustment of the way of contact of a damper felt with a string and thereby enables the damping performance of the damper and the improved performance of the piano.SOLUTION: A damper has: a damper body 31 disposed over a string S stretched horizontally and including a main damper head 35 and a main damper felt 36 stuck to the undersurface of the main damper head 35; and an auxiliary damper 33 adjoining at least one end side of the extending direction of the string S of the main damper head 35 and including an auxiliary damper head 38 linked to the main damper head 35 via a deformable adjusting member 32 and an auxiliary damper felt 39 stuck to the undersurface of the auxiliary damper head 38. The undersurface of the auxiliary damper felt 39 is positioned lower than the undersurface of the main damper felt 36.

Description

  The present invention relates to a damper for a grand piano that allows or stops vibration of a string by coming into and out of contact with a horizontally stretched string.

  Conventionally, for example, a damper disclosed in Patent Document 1 is known as this type of damper. This damper is for a grand piano, and includes a single damper head, two main damper felts fixed to the lower surface of the damper head, and two auxiliary damper felts. In the string extending direction, the two main damper felts are arranged near the center of the damper head, and the two auxiliary damper felts are arranged on both outer sides of the main damper felt. The auxiliary damper felt is thicker than the main damper felt, and the lower surface of the auxiliary damper felt is located below the lower surface of the main damper felt.

  When the key is pressed, the damper moves upward, and the main / auxiliary damper felt moves away from the string, thereby allowing vibration of the struck string. After that, when the key is released, the damper moves downward, the auxiliary damper felt comes into contact with the string, and the main damper felt comes into contact with the string. Attenuates.

Japanese Utility Model Publication No. 55-63581

  However, in the conventional damper described above, since the auxiliary damper felt is fixed to the damper head, the position and angle of the auxiliary damper felt in the vertical and horizontal directions cannot be easily adjusted. For this reason, even if the timing, angle, and position at which the auxiliary damper felt comes into contact with the string (hereinafter collectively referred to as “how to hit the string”) deviate from a desired state, these cannot be easily adjusted. . As a result, the desired sound stopping performance of the damper cannot be obtained, and consequently the performance of the piano is lowered.

  For example, when the so-called half pedal is used to adjust the amount of depression of the damper pedal so that the damper felt is slightly touched to the string in the released state, the timing at which the auxiliary damper felt contacts the string is shifted. However, since this cannot be adjusted easily, the half pedal effect intended by the performer cannot be obtained.

  In addition, when the number of strings per key is 2 or 3, and these strings are stopped by a single damper felt having slits or inclined surfaces, the position and angle of the auxiliary damper felt in the left-right direction Even when the slit and the inclined surface do not engage with the string well due to misalignment, the vibration of the string cannot be sufficiently attenuated and the damper has good sound-stopping performance. Can't get.

  The present invention has been made to solve the above-described problems, and can easily adjust how the damper felt strikes the strings, thereby improving the sound-stopping performance of the damper and the performance of the piano. An object of the present invention is to provide a damper for a grand piano that can be used.

  In order to achieve the above object, the invention according to claim 1 allows the vibration of the string by moving upward from the horizontally stretched string for each of the plurality of keys, and by contacting the string from above. A damper for a grand piano that stops vibration of the string, the main damper head having a main damper head and a main damper felt attached to the lower surface of the main damper head; An auxiliary damper head adjacent to at least one end side in the extending direction of the string and connected to the main damper head via a deformable adjustment member, and an auxiliary damper felt attached to the lower surface of the auxiliary damper head And a lower surface of the auxiliary damper felt is located below the lower surface of the main damper felt.

  According to this configuration, for example, when a key is pressed, the main damper felt and the auxiliary damper felt attached to the lower surface of the damper are separated upward from the string, thereby allowing the string to vibrate. After that, when the key is released, the main damper felt and the auxiliary damper felt come into contact with the string from above to stop the vibration of the string. In this case, since the lower surface of the auxiliary damper felt is located below the lower surface of the main damper head, the vibration of the string is caused by the main damper felt contacting the string after the auxiliary damper felt contacts the string. Decrease in steps.

  Further, since the auxiliary damper head is adjacent to at least one end side in the extending direction of the strings of the main damper head and is connected to the main damper head via a deformable adjustment member, by deforming the adjustment member, The position and angle of the auxiliary damper felt and the auxiliary damper felt attached to the lower surface thereof in the vertical direction and the horizontal direction can be adjusted. Furthermore, this adjustment can be performed with the auxiliary damper felt attached. For this reason, even if the way of hitting the strings of the auxiliary damper felt deviates from the desired state, this can be easily adjusted for each damper, and as a result, the sound stopping performance of the damper and the performance of the piano can be improved. it can.

  For example, the half pedal effect intended by the player can be easily obtained by adjusting the vertical position of the auxiliary damper felt with the adjusting member and adjusting the timing at which the auxiliary damper felt contacts the string. When stopping multiple strings with auxiliary damper felts with slits and inclined surfaces, adjust the position and angle of the auxiliary damper felt in the left-right direction, and engage the slits and inclined surfaces with the strings. By doing so, it is possible to obtain a good sound-stopping performance of the damper.

  According to a second aspect of the present invention, in the damper of the grand piano according to the first aspect, the adjustment member is made of a metal wire, and is inserted into mutually opposing surfaces of the main damper head and the auxiliary damper head. It is characterized by that.

  According to this configuration, the position and angle of the auxiliary damper head and the auxiliary damper felt can be adjusted only by bending the adjusting member made of a metal wire. Further, since this adjustment can be performed by repeatedly bending the adjustment member, the adjustment of how the auxiliary damper felt strikes the string can be performed very easily.

  The invention according to claim 3 is the damper of the grand piano according to claim 1 or 2, wherein the auxiliary damper felt is softer than the main damper felt.

  According to this configuration, since the auxiliary damper felt is softer than the main damper felt, when the damper felt comes into contact with the string, the auxiliary damper felt comes into contact with the string and in a compressed state, the main damper felt is surely attached to the string. Abut. For this reason, after the string vibration is attenuated to some extent by the auxiliary damper felt, it can be attenuated by the main damper felt. Therefore, stepwise damping of the string vibration by the main / auxiliary damper felt can be performed satisfactorily.

It is a side view which shows the keyboard apparatus of the grand piano provided with the damper by 1st Embodiment of this invention. It is a perspective view which expands and shows the damper of FIG. 1, a key, and its peripheral part. It is sectional drawing which shows the positional relationship of a damper main body, an auxiliary damper, and a string in a key release state and a key depression state, respectively. It is a side view which shows the positional relationship of the damper head and string of the damper of FIG. It is a side view which shows the modification of the damper head of 1st Embodiment. It is a side view which shows the damper head of the damper by 2nd Embodiment.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a keyboard device 3 of a grand piano (hereinafter referred to as “piano”) 2 provided with a damper 1 according to a first embodiment of the present invention in a key-released state. In the following description, when the piano 2 is viewed from the performer, the front side (right side in the figure) is “front”, the back side (left side in the figure) is “rear”, and the left side and right side are “ The description will be given as “left” and “right”.

  As shown in the figure, the keyboard device 3 includes a key 4, a keyboard 5, an action 6 and a plurality of hammers 7 (only one is shown). The keyboard 5 is composed of a plurality of (for example, 88) keys 5a (only one is shown). The key 5a is supported in a swingable manner on a balance pin 8 provided upright on the collar 4 at the center thereof, and extends in the front-rear direction.

  The action 6 is arranged above the rear part of the keyboard 5 and has a whippen 11, a repetition lever 12 and a jack 13 for each key 5a. The wippen 11 is rotatably supported on the wippen rail 10 via the wippen flange 11a at the rear end, and is placed on the key 5a at the center. The repetition lever 12 and the jack 13 are rotatably attached to the wippen 11.

  Each hammer 7 is provided for each key 5a and includes a hammer shank 7a extending in the front-rear direction and a hammer head 7b attached to the rear end of the hammer shank 7a. At the front end of the hammer shank 7a, the shank flange The hammer shank rail 14 is rotatably supported via 7c.

  According to the above configuration, when the key 5a is depressed, the whippen 11 is pushed up by the key 5a as the key 5a rotates about the balance pin 8 in the clockwise direction in FIG. Rotate in the direction. As the whippen 11 rotates, the repetition lever 12 and the jack 13 move upward, and the jack 13 pushes up the hammer 7 so that the hammer 7 rotates clockwise and is stretched horizontally above it. The string S is struck.

  As shown in FIGS. 1 and 2, the damper 1 according to the present invention is disposed behind the keyboard 5, and includes a plurality of damper levers 22 and damper heads 23 provided for each key 5a (only one is provided). (Shown).

  Each damper lever 22 is rotatably supported by the damper lever rail 21 via a damper lever flange 24 at the rear end thereof, and extends in the front-rear direction. Further, the damper lever 22 is placed on the lifting rail 29. The lifting rail 29 is placed on a lifting rail lifting rod 30 extending in the vertical direction, and a lower end portion of the lifting rail lifting rod 30 is connected to a damper pedal (not shown). In the key release state, the front end portion of the damper lever 22 faces the rear end portion of the corresponding key 5a from above.

  A damper wire flange 25 is rotatably attached to the center of the damper lever 22. A damper wire 27 is fixed to the upper surface of the damper wire flange 25 and extends upward. The damper wire 27 is passed through the guide hole 28a of the damper wire guide holder 28, and the damper head 23 is attached to the upper end portion thereof.

  The damper head 23 includes a damper main body 31, an adjustment member 32, and an auxiliary damper 33, and is disposed on the upper side of the string S. The damper main body 31 and the auxiliary damper 33 are obtained by dividing a normal damper head of a piano. 1 to 4 show the string S and the damper head 23 for the mid range. The string S is composed of three music wires MW made of high carbon steel, and these music wires MW are juxtaposed in the left-right direction at the same height and at predetermined equal intervals ( FIG. 3).

  The damper main body 31 has a main damper head 35 and two main damper felts 36 and 36 attached to the main damper head 35. The main damper head 35 is made of wood and extends in the front-rear direction. A hole 35a is formed near the center of the left side surface of the main damper head 35, and the upper end portion of the damper wire 27 bent to the right is engaged with the hole 35a. Further, two holes 35b and 35b (only one is shown in FIG. 4A) are formed on the back surface of the main damper head 35.

  The two main damper felts 36, 36 are arranged in front of and behind the damper wire 27 and are attached to the lower surface of the main damper head 35 via the under felt 37. As shown in FIG. 3 (a), the left and right side surfaces of each main damper felt 36 are inclined surfaces 36a, 36a inclined inwardly downward, and a triangular shape is formed at the center of the lower surface. The slits 36b are formed and extend over the entire front and rear direction of each main damper felt 36. As a result, two wedge-shaped engaging portions 36c and 36c are formed in the main damper felt 36 by the inclined surfaces 36a and 36a and the slit 36b.

  The auxiliary damper 33 has an auxiliary damper head 38 and an auxiliary damper felt 39 attached to the auxiliary damper head 38. The auxiliary damper head 38 is disposed adjacent to the rear side of the rear end portion of the main damper head 35. On the front surface of the auxiliary damper head 38, two left and right holes 38a, 38a (only one is shown in FIG. 4A) are formed. The auxiliary damper felt 39 is made of a softer felt than the main damper felt 36, and is attached to the lower surface of the auxiliary damper head 38 via the under felt 40.

  As shown in FIG. 3B, the cross-sectional shape of the auxiliary damper felt 39 is the same as that of the main damper felt 36, and the auxiliary damper felt 39 is formed by inclined surfaces 39a and 39a on the left and right side surfaces and a slit 39b on the center of the lower surface. Are formed with two wedge-shaped engaging portions 39c, 39c over the entire front-rear direction.

  The adjusting member 32 includes two wire rods 32a and 32a (only one is shown). The wire 32a is made of a metal that can be bent by hand and has a hardness such that the shape is maintained after being bent, such as copper or aluminum. One end of the wire rods 32a and 32a is inserted and fixed in the holes 35b and 35b of the main damper head 35, and the other end is inserted and fixed in the holes 38a and 38a of the auxiliary damper head 38, whereby the auxiliary damper head 38 is fixed. The main damper head 35 is connected to the main damper head 35 via the adjusting member 32. The auxiliary damper 33 is inclined rearward and downward with respect to the main damper 31, and the lower surface of the auxiliary damper felt 39 is located below the lower surface of the main damper felt 36.

  Next, the operation of the damper 1 having the above-described configuration will be described with reference to FIG. In the key release state shown in FIG. 5A, the main damper felt 36 and the auxiliary damper felt 39 of the damper head 23 are in contact with the string S from above. In this state, as shown in FIGS. 3C and 3D, the engaging portions 36c and 39c of the main and auxiliary damper felts 36 and 39 are engaged between the two adjacent music wires MW and MW. The slits 36b and 39b are engaged with the central music wire MW.

  When the key 5a is depressed from this state, the key 5a rotates clockwise in FIG. 1, contacts the damper lever 22, and presses it. Thereby, the damper lever 22 rotates counterclockwise around the rear end. Along with this rotation, the damper wire flange 25, the damper wire 27, and the damper head 23 move upward while the damper wire 27 is guided by the guide hole 28a of the damper wire holder 28. As a result, the main damper felt 36 and the auxiliary damper felt 39 are separated from the string S (FIG. 4B). In this state, when the hammer 7 driven by the action 6 hits the string S, the vibration of the string S is allowed and a piano sound is generated.

  Thereafter, when the key 5a is released, the damper head 23 and the like are moved downward by the reverse operation to the above-described operation as the damper lever 22 returns and rotates clockwise. Along with the movement of the damper head 23, the auxiliary damper felt 39 located on the lower side first comes into contact with the string S ((c) in the figure), so that the vibration of the string S is attenuated to some extent. After that, when the auxiliary damper felt 39 is compressed, the main damper felt 36 located on the upper side comes into contact with the string S ((d) in the figure), thereby further attenuating the vibration of the string S. The vibration of S is stopped and the sound is stopped.

  Further, when the damper pedal is depressed, the lifting rail 29 is pushed up by the lifting rail lifting rod 30 to rotate upward. As a result, all the damper levers 22 rotate upward, and the main / auxiliary damper felts 36 and 39 are separated from the strings S all at once, thereby allowing all the strings S to vibrate and imparting a damper pedal effect. .

  Further, when the manner in which the auxiliary damper felt 39 hits the string S deviates from a desired state, the position and angle of the auxiliary damper felt 39 are adjusted by the adjusting member 32. For example, when the timing with which the auxiliary damper felt 39 abuts on the string S is shifted, the auxiliary damper head 39 is picked up and bent by bending the wires 32a and 32a upward or downward by applying force. Adjust the vertical position of. Further, since the position and angle of the auxiliary damper felt 39 in the left-right direction are deviated, the wire rods 32a and 32a are bent leftward or rightward when the engaging portion 39c does not engage with the string S satisfactorily. Thus, the position and angle of the auxiliary damper felt 39 in the left-right direction are adjusted.

  As described above, according to the present embodiment, the position and angle of the auxiliary damper felt 39 in the vertical direction and the horizontal direction can be easily adjusted by simply bending the wire members 32a and 32a constituting the adjustment member 32 by hand. The half pedal effect intended by the person, the good sound-stopping performance of the damper 1, and the like can be easily obtained. As a result, the sound stopping performance of the damper 1 and the performance of the piano 2 can be improved. In addition, since the adjustment described above can be performed by repeatedly bending the adjustment member 32 with the auxiliary damper felt 39 attached, the adjustment of how the auxiliary damper felt 39 hits the string S can be performed very easily. .

  Further, since the auxiliary damper felt 39 is softer than the main damper felt 36, when the damper felt abuts against the string S, the auxiliary damper felt 39 abuts against the string S and is compressed in a state where the auxiliary damper felt 36 is compressed. Abuts securely. Therefore, the vibration of the string S can be attenuated by the main damper felt 36 after being attenuated to some extent by the auxiliary damper felt 39. Therefore, stepwise attenuation of the vibration of the string S by the main / auxiliary damper felts 36 and 39 can be performed satisfactorily.

  FIG. 5 shows a modification of the damper head 23. As shown in the figure, the damper head 42 has a normal damper head of a piano as a damper main body 43 and an auxiliary damper 33 attached thereto via an adjustment member 32. The length of the damper main body 43 in the front-rear direction is longer than that of the damper main body 31 of the first embodiment, and accordingly, the length of the entire damper head 42 including the auxiliary damper 33 in the front-rear direction is the length of the damper of the first embodiment. It is larger than the entire length of the head 23.

  With the above configuration, the same effect as that of the first embodiment can be obtained in this modified example. Further, since the damper head 42 is longer than that in the first embodiment, the vibration of the string S can be attenuated more favorably, and the sound stopping operation by the damper head 42 can be performed more favorably. Furthermore, since the damper head 42 can be configured by simply attaching the auxiliary damper 33 to the existing damper main body 43, it can be manufactured at a lower cost than the damper 1 of the first embodiment.

  Next, a damper 51 according to a second embodiment of the present invention will be described with reference to FIG. In addition, in the same figure, the same code | symbol is attached | subjected about the component same as the damper 1 of 1st Embodiment. As shown in the figure, the damper 51 uses an adjustment member 52 instead of the adjustment member 32 of the damper 1. This adjustment member 52 is a block-shaped member made of thermoplastic resin, and is provided in a state of being interposed between the back surface of the main damper head 35 and the front surface of the auxiliary damper head 38, and connects both the members 35 and 38. is doing. Other configurations of the damper 51 are the same as the damper 1 of the first embodiment.

  In the present embodiment, when adjusting the position and angle of the auxiliary damper felt 39, after the adjustment member 52 is softened by heating, a force is applied to the adjustment member 52 via the auxiliary damper head 38. The adjustment member 52 is deformed so that a desired position and angle of the auxiliary damper felt 39 can be obtained, and this state is maintained until the adjustment member 52 is cured. Thereby, the position and angle of the auxiliary damper felt 39 can be easily adjusted. Therefore, also in this embodiment, the same effect as that of the first embodiment can be obtained.

  In addition, this invention can be implemented in various aspects, without being limited to the described embodiment. For example, in the embodiment, the auxiliary damper 33 is disposed on the rear side of the main damper head 35 in order to abut against a portion where the amplitude of the string S is larger and to attenuate the vibration of the string S more effectively. It may be arranged on the front side or on both the back side and the front side.

  Further, in the embodiment, a description is given by taking as an example the mid-range damper 1 that stops the string S composed of three music wires MW with the damper head 35 having one slit 39b and two engaging portions 39c. However, it goes without saying that the present invention may be applied regardless of the number of strings, the presence or absence of slits, the number of slits and engaging portions, and the sound range. Furthermore, although two main damper felts 36 and 36 are provided on the main damper head 35 in the front and rear directions, only one main damper felt may be provided in a high frequency damper head having a smaller length in the front and rear direction. In addition, it is possible to appropriately change details within the scope of the gist of the present invention.

  The embodiment is an example in which the present invention is applied to an acoustic type grand piano 2. However, the present invention is not limited to this, and may be applied to other types of grand pianos such as a mute type.

1 Damper 2 Grand Piano (Grand Piano)
5a key 23 damper head 31 damper body 32 adjustment member 32a wire 33 auxiliary damper 35 main damper head 36 main damper felt 38 auxiliary damper head 39 auxiliary damper felt 42 damper head 43 damper main body 51 damper 52 adjustment member S string

Claims (3)

This is a grand piano damper that allows vibration of the string by moving upward from the horizontally stretched string for each of the keys, and stops vibration of the string by contacting the string from above. And
A damper body provided on the upper side of the string, having a main damper head, and a main damper felt attached to the lower surface of the main damper head;
An auxiliary damper head that is adjacent to at least one end in the string extending direction of the main damper head and connected to the main damper head via a deformable adjustment member, and is attached to the lower surface of the auxiliary damper head An auxiliary damper having an auxiliary damper felt,
A damper for a grand piano, wherein the lower surface of the auxiliary damper felt is located below the lower surface of the main damper felt.   2. The grand piano damper according to claim 1, wherein the adjustment member is made of a metal wire and is inserted into mutually opposing surfaces of the main damper head and the auxiliary damper head. 3.   3. The damper of a grand piano according to claim 1, wherein the auxiliary damper felt is softer than the main damper felt.

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