JP2008170552A - Damper device of upright piano - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a damper device of an upright piano that can keep a damper in proper operation even when used for a long period. <P>SOLUTION: The damper device includes a wippen 6 which rotates as a key is pressed; a cord 25 coupled at one end to the wippen 6; a damper lever flange 21; the damper 20 which extends in a vertical direction and is supported at its center on the damper lever flange 21 rotatably on an axis extending in a horizontal direction and to which the other end of the cord 25 is coupled; and a damper lever spring 24 which energizes the damper 20 toward the strings S and presses the damper 20 against the strings S in a key release state. The damper 20 is towed when the wippen 6 rotates as the key is pressed to rotate against spring force of the damper lever spring 24 and then leave the strings S. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention allows an piano sound to be generated by moving away from a string when the key is pressed, and an upright piano that presses the string to stop the generated piano sound when the key is released. The present invention relates to a damper device.

  As a conventional damper device of this type, for example, one disclosed in Patent Document 1 is known. The damper device is configured in the same manner as a general damper device, and includes a damper lever flange (support member) fixed to the center rail, a damper lever rotatably provided on the damper lever flange, and a damper. A damper head is provided at the upper end of the lever via a damper lever wire. The damper lever is urged toward the string side disposed rearward by a damper lever spring, so that the damper head presses the string in the key released state.

  Further, felt is attached to the lower end portion of the front surface of the damper lever, and a spoon is erected at the rear end portion of the wippen so as to face the felt of the damper lever. This spoon is usually made of a hard metal such as brass, and is formed with a narrow width.

  As the key is pressed, the spoon rotates with the whippen and abuts the felt. As a result, the damper lever is driven and rotated against the spring force of the damper lever spring, so that the damper head is separated from the string, and the vibration of the string due to the string striking immediately after that, and the generation of the piano sound due to it. Permissible. Further, when the key is released, the damper lever is rotated toward the string side by the spring force of the damper lever spring, and the damper head presses the string, thereby stopping the vibration of the string and the generation of the piano sound.

  As described above, in this conventional damper device, when the damper lever is driven as the key is pressed, the hard metal spoon having a small width comes into contact with the felt of the damper lever. And since the contact | abutting of such a spoon is repeatedly performed for every key pressing, the contact | abutting part of the felt with a spoon will be intensively shaved and thinned by long-term use. As a result, the timing at which the spoon abuts on the felt when the key is pressed is delayed, and the start timing of the operation of the damper lever is delayed. Therefore, the proper operation of the damper cannot be ensured.

  The present invention has been made to solve the above-described problems, and provides a damper device for an upright piano that can maintain an appropriate operation of the damper even when used for a long period of time.

Japanese Patent Laid-Open No. 7-230278

  In order to achieve the above-mentioned object, the invention according to claim 1 allows the generation of a piano sound when the key is pressed and the piano sound is generated by moving away from the string, and the generated piano sound is generated when the key is released. A damper device for an upright piano that presses a string to stop sound. The whippen rotates with a key press, a cord connected to the whippen at one end, a damper lever flange, and a vertical extension. In the center, the damper lever is pivotally supported around the axis extending in the left-right direction, and the damper to which the other end of the cord is connected, and the damper is urged toward the string side to release the key. A damper lever spring that presses the string against the damper, and the damper is pulled by the cord when the whippen rotates with the key depression. What pivots against the spring force of the damper lever spring, wherein the distance from the strings.

  According to the damper device of the upright piano, when the key is released, the spring force of the damper lever spring presses the string while the damper is rotated to the string side, and the whippen rotates when the key is pressed. The damper is rotated against the spring force of the damper lever spring by being pulled by a cord connected between the wippen and the damper. Thereby, a damper leaves | separates from a string and generation | occurrence | production of the piano sound by a vibration of a string is accept | permitted.

  Thus, since the damper is rotated by being pulled by the cord, even if the key is repeatedly pressed, the damper is not damaged at all by the contact of the spoon as in the conventional damper device. As a result, even when the upright piano is used for a long time, the start timing of the rotation of the damper can be maintained constant, and the proper operation of the damper can be maintained.

  According to a second aspect of the present invention, in the damper device for the upright piano according to the first aspect, the wippen has a wire erected at a portion close to the damper, and one end of the cord is connected to the wire. It is characterized by being.

  According to this configuration, since one end of the cord is connected to the wire erected on the wippen, the looseness of the cord connected between the wire and the damper can be adjusted by bending the wire. Accordingly, it is possible to adjust the timing at which the cord starts to pull the damper in accordance with the key depression, and therefore it is possible to easily adjust the timing at which the damper moves away from the string.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an upright piano damper device 1, keyboard 2, action 3, and the like according to an embodiment of the present invention in a key-released state. In the following description, the front side of the upright piano when viewed from the performer side is described as “front”, and the back side is described as “rear”.

  The keyboard 2 is composed of a large number of keys 2a (only one is shown) arranged in the left-right direction. Each key 2a is rotatably supported by the collar 5 via a balance pin 5a provided upright on the collar 5 at the approximate center in the front-rear direction (left-right direction in FIG. 1). The action 3 is arranged above the rear end of the keyboard 2 and is attached to a plurality of action brackets (not shown) placed on the shelf board 4. Action 3 has whippen 6, bat 7 and jack 8 for each key 2a (only one is shown).

  A center rail 9 is passed between the plurality of action brackets, and a wippen flange 6a is screwed to each key 2a at the lower end thereof (only one is shown). The wippen 6 is made of, for example, a synthetic resin molded product, has a predetermined shape that is long in the front-rear direction, and is rotatably attached to the wippen flange 6a at the rear part. Further, the whippen 6 is placed on the capstan screw 2b provided at the rear end of the key 2a at the front part thereof.

  The jack 8 is rotatably attached to the whippen 6, and a jack spring 8 a is provided between the two 8 and 6. A butt flange 7a is fixed to the front upper end portion of the center rail 9, and the bat 7 is rotatably attached to the butt flange 7a.

  Further, the bat 7 is integrally provided with a hammer 10, and a hammer assembly 11 is constituted by the both 7 and 10. The hammer assembly 11 is supported by the jack 8 via the lower end portion of the bat 7, and the hammer 10 faces the string S stretched rearward. Further, a butt spring 7b is provided between the bat 7 and the bat frenzy 7a to urge the hammer assembly 11 to the opposite side (front side) to the string S. A catcher 7 c is integrally provided on the front surface of the bat 7.

  Further, a back check wire 6c and a bridle wire 6d are erected in this order in front of the jack 8 of the wippen 6. A back check 6e is provided at the upper end of the back check wire 6c, and the upper end of the bridle wire 6d and the catcher 7c are connected by a bridle tape 7d.

  The damper device 1 is provided on the center rail 9 for each key 2a (only one is shown), and as shown in FIG. 2, a damper lever flange 21 screwed to the upper surface of the center rail 9 and the damper lever The damper 20 is rotatably supported by the flange 21 and the aforementioned wippen 6 or the like.

  The damper lever flange 21 is, for example, a thick plate formed of a synthetic resin molded product, and left and right end portions are provided with a pair of left and right lever support portions 21b and 21b protruding rearward ( Only one is shown). The damper 20 includes a damper lever 22 and a damper head 23 connected to the damper lever 22. The damper lever 22 is made of a synthetic resin molded product or a wood material, and extends long in the vertical direction. A horizontal pin 22a is provided at the center of the damper lever 22 so as to protrude from the left and right sides. The pin 22 a is attached to the left and right support portions 21 b and 21 b of the damper lever flange 21 so that the damper lever 22 is rotatably supported by the damper lever flange 21.

  A damper wire 22b is erected on the damper lever 22, and the damper head 23 is integrally provided on the upper end portion of the damper wire 22b. The damper head 23 includes a damper block 23a attached to the upper end portion of the damper wire 22b, and a damper felt 23b attached to the back surface of the damper block 23a.

  A spring engaging groove 22d extending in the vertical direction is formed at the upper end of the front surface of the damper lever 22, and the damper lever flange 21 has a pin 21a on the front side of the lever support portions 21b and 21b. Is provided. A damper lever spring 24 is provided between the spring engagement groove 22d and the pin 21a. The damper lever spring 24 urges the damper lever 22 in the counterclockwise direction of FIG. 2 about the pin 22a, and the damper head 23 presses the string S.

  Further, a step surface 22c that is slightly retracted to the rear side of the upper surface is formed at the lower part of the front surface of the damper lever 22. A felt 22b is attached to the upper portion of the step surface 22c. On the other hand, a damper rod (not shown) is provided between the center rail 9 and the lower end of the damper lever 22, and a damper pedal (not shown) is connected to the damper rod. The damper rod presses the felt 22b as the damper pedal is depressed, and drives the damper 20. As a result, the damper 20 rotates clockwise against the urging force of the damper lever spring 24 while the damper pedal is depressed, and is kept away from the string S, thereby producing a piano sound. A damper pedal effect is applied.

  On the other hand, a wire 26 is erected on the whippen 6 at a site behind the lower end of the damper lever 22. The wire 26 is made of brass, for example, and its upper end is bent into a triangular shape as shown in FIG.

  A cord 25 is provided between the wire 26 and the damper lever 22. The cord 25 is made of a cotton woven cloth and is formed in a tape shape having a predetermined width and length. The front end portion of the cord 25 is bonded to the lower end portion of the step surface 22 c of the damper lever 22. As shown in FIG. 3, a hole 25a is provided in the rear end portion of the cord 25. The cord 25 has a rear end portion that passes through a triangular portion of the wire 26 and a wire in the hole 25a. The distal end portion of 26 is inserted and engaged with the wire 26 with a slight looseness. As described above, the cord 25 is connected between the damper 20 and the wire 26.

  Next, the operation of the damper device 1 configured as described above will be described. When the key 2a is depressed from the key release state shown in FIG. 1, the whippen 6 is pushed upward by the key 2a and is rotated upward. Accordingly, the jack 8 moves upward together with the wippen 6, and the hammer assembly 11 is pushed up by the jack 8, so that it rotates against the spring force of the butt spring 7b. Further, the wire 26 rotates together with the wippen 6 and moves backward. Accordingly, the cord 25 that engages the wire 26 is pulled backward.

  When the key is pushed further and the cord 25 is not loosened, the lower end portion of the damper lever 22 is pulled backward by the cord 25. Accordingly, as shown in FIG. 4, the damper 20 rotates clockwise around the pin 22 a against the spring force of the damper lever spring 24, and the damper head 23 moves away from the string S, thereby The string S is allowed to vibrate when the hammer 10 is struck.

  When the key is further pushed and the jack 8 is engaged with the regulating button 9a attached to the center rail 9, the jack 8 rotates against the spring force of the jack spring 8a. Then, the jack 8 is detached from the bat 7, the hammer assembly 11 is further rotated, and the hammer 10 strikes the string S, whereby a piano sound due to the vibration of the string S is generated.

  When the key 2a is released, the wire 26 moves forward as the whippen 6 rotates in the opposite direction to that during key depression. Thereby, by losing the traction force with respect to the damper 20, the damper 20 is rotated counterclockwise by the spring force of the damper lever spring 24, and the damper head 23 abuts against the string S and presses it. The vibration of the string S and the piano sound are stopped.

  As described above, according to the damper device 1 of the present embodiment, the damper 20 rotates by being pulled by the cord 25 along with the key depression, so that even if the key depression is repeatedly performed, There is no damage to the damper due to the contact of the spoon as in the damper device. As a result, even when the upright piano is used for a long period of time, the start timing of the rotation of the damper 20 can be maintained constant, and the proper operation of the damper 20 can be maintained.

  Further, since the rear end portion of the cord 25 is connected to the wire 26 erected on the whippen 6, the looseness of the cord 25 in the key release state can be adjusted by bending the wire 26. Thereby, the timing at which the cord 25 starts to pull the damper 20 in accordance with the key depression can be adjusted. Therefore, the timing at which the damper 20 moves away from the string S can be easily adjusted.

  FIG. 5 shows a modification of the damper lever. As shown in the figure, slits 31a that open to the left and right side surfaces and the bottom surface are formed at the lower end of the damper lever 31 according to this modification. In the embodiment described above, the upper end portion of the cord 25 is attached to the stepped surface 22c of the damper lever 22, whereas in the present modification, the upper end portion of the cord 25 is inserted into the slit 31a. In the state, it is attached to the damper lever 31 by screwing or bonding.

  Note that the present invention is not limited to the embodiments and modifications described above, and can be implemented in various modes. For example, in the embodiment and the modification, the rear end portion of the cord 25 is engaged with the wire 26 erected on the whippen 6, but the present invention is not limited thereto, and may be directly attached to the whippen 6. . Further, as a method of attaching the cord 25 to the damper lever, for example, the upper end portion of the cord 25 may be impregnated with resin and cured, and then attached to the damper lever by screwing. In addition, it is possible to appropriately change the detailed configuration within the scope of the gist of the present invention.

It is a side view which shows the damper apparatus, keyboard, action, hammer, etc. of the upright piano by one Embodiment of this invention in a key release state. It is a partial expanded side view which shows the damper apparatus of FIG. It is a perspective view which shows a part of damper apparatus of FIG. It is a side view of a damper device showing the state where a damper etc. rotated with key pressing. It is a perspective view which shows a part of modification of the damper apparatus of FIG.

Explanation of symbols

1 Damper Device 2a Key 6 Whippen 20 Damper 21 Damper Lever Frange 24 Damper Lever Spring 25 Cord 26 Wire S String

Claims (2)

An upright piano damper that allows the generation of piano sound by moving away from the string when the key is pressed and pressing the string to stop the generated piano sound when the key is released A device,
Whippen rotating with key press,
A cord connected to the whippen at one end;
Damper lever frenzy,
A damper that extends in the vertical direction and is supported rotatably at the damper lever flange about the axis extending in the horizontal direction at the center, and the other end of the cord is connected;
A damper lever spring that urges the damper toward the string side and presses the string against the damper in a key release state;
The damper is rotated against the spring force of the damper lever spring and separated from the string by being pulled by the cord when the whippen is rotated in accordance with the key depression. Upright piano damper device. In the wippen, a wire is erected at a portion close to the damper,
The damper device for an upright piano according to claim 1, wherein the one end of the cord is connected to the wire.

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