JP2006243294A - Hammer for upright piano - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hammer for an upright piano which can obtain a touch feeling closer to that of a grand piano and can obtain a high performance superior in expression. <P>SOLUTION: The hammer 1 of the upright piano rotates when a key 4 is pressed, a jack 7 is separated during the rotation and after the separation, the hammer 1 strikes a string S located at the back. The hammer 1 is provided with a bat 20 which rotates centered around a rotation fulcrum 20b by being pushed up by the jack 7, a hammer shank 21 which is arranged on the top of the bat 20 and is extended along a vertical direction, a hammer head 22 which is arranged on the top end section of the hammer shank, a catcher shank 23 which is projected toward the front from the bat 20, a catcher 24 which is arranged at the front end section of the catcher shank and a weight 26 which is at least mounted on either one of the catcher shank 23 or the catcher 24 to increase the touch weight when the key 4 is pressed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a hammer for an upright piano that is rotated by being pushed up by a jack when a key is pressed and generates a performance sound by striking a string.

  As a conventional hammer of an upright piano, for example, one disclosed in Patent Document 1 is known. The hammer includes a bat that is pivotally attached to the butt frenzy, a hammer shank that is erected on the bat and extends in the vertical direction, a hammer head that is provided at the upper end of the hammer shank, and a front side from the bat. A protruding catcher shank and a catcher provided at the front end of the catcher shank are provided. In addition, an action jack is engaged with the front portion of the butt slightly from the lower side than the pivot point of the bat. The hammer having such a configuration is a general one, and is rotated backward about a rotation fulcrum when the bat is pushed up by the jack as the key is pressed. In the middle of this rotation, when the jack is detached from the bat, the player is given a let-off feeling, and the hammer is rotated as it is by inertia and hits a string vertically stretched backward. , Generate a performance sound.

  On the other hand, in the grand piano, the hammer is pivotally attached to the hammer shank flange at the pivot point of the front end, and extends in the front-rear direction, and the hammer provided at the rear end of the hammer shank. The jack is opposed to the rear part slightly from the rotation fulcrum via a shank roller from below. Such a hammer is pushed up by a jack via a shank roller as the key is pressed, and rotates upward about a rotation fulcrum. In the middle of this rotation, the jack is released from the shank roller to give the player a let-off feeling, and the hammer rotates as it is due to inertia and hits a string stretched horizontally upward. , Generate a performance sound.

  Comparing the touch feeling between the upright piano and the grand piano as described above, as shown in FIG. 6, the let-off load, which is the touch weight when the jack is detached from the hammer, is the grand piano shown in FIG. Is larger than the upright piano in FIG. 5A (L2> L1). This is due to the following reasons. In the case of an upright piano, since the hammer shank extends in the vertical direction, the center of gravity of the hammer is close to the rotation fulcrum, and therefore the moment around the rotation fulcrum due to the weight of the hammer is small. On the other hand, in the case of a grand piano, the hammer shank extends in the front-rear direction, so the center of gravity of the hammer is located far from the pivot point of the hammer. The turning moment is larger than the upright piano. This is because such a moment difference becomes a reaction force when the jack is detached from the hammer, that is, a difference in let-off load. Such a difference in the let-off load is one of the large differences in touch characteristics between the upright piano and the grand piano.

  Therefore, the amount of change in the touch weight before and after the let-off is also larger for the grand piano. As a result, a clear let-off feeling can be obtained with the grand piano, whereas the amount of change in the touch weight with the upright piano. Is small and the let-off feeling is less clear than the grand piano. For this reason, it is difficult for upright piano players to grasp the timing of let-off compared to the case of a grand piano, and it is difficult to finely adjust the touch control immediately before let-off, that is, the hammer striking speed. However, the upright piano is less expressive than the grand piano, which is the cause of poor performance.

  In both pianos, the weight of the hammer varies between the low and high ranges, and is heavier on the low side and lighter on the high side. However, due to the difference in the moments around the rotation fulcrum of the hammer as described above, the difference in the weight of the hammer is greatly reflected in the touch feeling in the grand piano, the low range is heavy, and the high range has a light touch weight. On the other hand, with an upright piano, there is almost no difference in touch weight between the low sound range and the high sound range.

  The present invention has been made in order to solve the above-described problems, and can provide a hammer for an upright piano that can provide a touch feeling closer to that of a grand piano and can provide a high performance with excellent expressive power. The purpose is to provide.

JP-A-6-27934 (Page 3, Fig. 1)

  In order to achieve the above object, the invention according to claim 1 of the present invention is rotated by being pushed up by a jack as the key is depressed, and after the jack is detached during the rotation, A hammer of an upright piano that generates a performance sound by striking a string stretched in the back, and is rotatably supported by a pivoting fulcrum. When the key is released, the jack is engaged and the key is pressed. A bat that pivots about a pivotal fulcrum by being pushed up by a jack with a key, a hammer shank that is erected on the bat and extends in the vertical direction, and an upper end of the hammer shank for striking a string Hammer head, catcher shank projecting forward from the bat, catcher provided at the front end of the catcher shank, and touch weight when the key is pressed In order to impart, characterized in that it and a weight attached to at least one of the catcher shank and catcher.

  The hammer of the upright piano rotates toward the rear string about the rotation fulcrum as the bat is pushed up by the jack as the key is pressed. In the middle of this rotation, the jack is detached from the bat, whereby the weight of the hammer is suddenly lost from the touch weight, thereby giving the player a let-off feeling. Also, a weight is attached to at least one of the catcher shank projecting forward from the bat, that is, the opposite side of the string, and the catcher provided at the front end thereof, and the hammer is rotated by pressing the weight. A moment in the direction opposite to the moving direction acts around the rotation fulcrum.

  As described above, the moment around the rotation fulcrum is increased by the weight, so that the reaction force from the hammer when the key is depressed is increased, thereby obtaining a larger touch weight. In addition, since the moment around the rotation fulcrum is increased, the let-off load immediately before the let-off when the jack is detached from the hammer also increases as compared with the conventional hammer, and as a result, the change in the touch weight before and after the let-off. Can be increased. Thereby, the performer can obtain a clear let-off feeling similar to a grand piano. Therefore, with this upright piano, it is easy to grasp the timing of the let-off, making it easier to control the hammer striking speed by controlling the strength of the touch, and realizing high performance with excellent expressive power. .

  The catcher shank extends forward from the bat, and the catcher shank and the catcher are located farther from the rotation fulcrum than the portion where the jack engages with the bat. Therefore, by attaching the weight to the catcher shank and / or the catcher having such a positional relationship, the moment around the rotation fulcrum by the weight can be effectively increased, and the touch weight and letoff load added thereby can be reduced. Can be obtained effectively. As a result, the weight conventionally provided on the key can be reduced or omitted. Further, the catcher and the catcher shank are usually provided to lock the hammer that returns and rotates after stringing to the back check. Therefore, the hammer according to the present invention can be configured easily and inexpensively by simply using such existing components and attaching a weight.

  The invention according to claim 2 is the hammer of the upright piano according to claim 1, wherein the weight is attached to the front end portion of the catcher shank and the catcher.

  According to this configuration, the weight is arranged on both the front end of the catcher shank and the catcher, that is, at a position as far as possible from the rotation fulcrum. The touch weight, letoff load, and the like to be obtained can be obtained more effectively.

  According to a third aspect of the present invention, in the hammer of the upright piano according to the first or second aspect, an attachment hole is formed in at least one of the catcher shank and the catcher, and the weight is attached in a state of being embedded in the attachment hole. It is characterized by being.

  According to this structure, the weight is attached in a state of being embedded in the catcher shank and / or the attachment hole formed in the catcher. Thereby, the operation | movement of the existing components, such as a hammer itself and an action, is not prevented by a weight, Therefore Smooth operation | movement, such as a hammer and an action, can be ensured.

  The invention according to claim 4 is the hammer of the upright piano according to any one of claims 1 to 3, wherein the hammer is composed of a plurality of hammers provided for each of a plurality of keys, and the weight is a plurality of hammers. The weight of the weight is set so as to be larger toward the lower sound range side for each predetermined sound range.

  In this configuration, the weight is attached to each of the plurality of hammers, and the weight of the weight is set to a larger value on the low sound side for each predetermined sound range. As a result, it is possible to obtain a touch weight characteristic according to the sound range of the grand piano, in which the moment around the rotation fulcrum and the touch weight added thereby are large on the low sound side and small on the high sound side.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows the hammer 1, keyboard 2, action 3, and the like of the upright piano according to the first 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 number of keys 4 (only one is shown) arranged in the left-right direction (the depth direction in FIG. 1). Each key 4 is supported so as to be rotatable about a balance pin 5a erected on the collar 5 at a substantially center in the front-rear direction (left-right direction in FIG. 1).

  The action 3 is attached to brackets (not shown) provided on the left and right end portions of the flange 5 above the rear end portion of the keyboard 2, and is provided between the brackets. The action 3 has a whippen 6, a jack 7, and the like, which are provided for each key 4 (only one is shown). A center rail 16 and a hammer rail 17 are passed between the left and right brackets. A whippen flange 12 and a butt flange 25 are screwed to the center rail 16 for each key 4 (one for each). Only shown). Then, the wippen 6 is rotatably supported by the wippen flange 12 through its pin-shaped fulcrum 6b at the rear end. Further, the hammer 1 is rotatably supported at the lower end portion by a butt flange 25 via a pin-shaped fulcrum 20b (rotation fulcrum).

  The wippen 6 is formed in a predetermined shape by, for example, a synthetic resin or wood, and has a heel portion 6a that protrudes downward from the front portion thereof. The stan button 4a is placed via a heel portion 6a. Further, a back check wire 9 a is erected on the front end portion of the upper surface of the wippen 6, and the back check 9 is attached to the tip end portion thereof. Further, a spoon 11 for driving a damper 27 described later is erected on the rear end portion of the upper surface of the wippen 6. Further, the aforementioned Wippen Frenzy 12 is disposed immediately in front of the spoon 11, and the Wippen Frenzy 12 is fixed to the center rail 16 at the upper part thereof.

  The jack 7 is made of, for example, a synthetic resin and is integrally formed by injection molding. The jack 7 has a base portion 7a extending in the front-rear direction and a hammer push-up portion 7b extending upward from the rear end portion of the base portion 7a. Such a jack 7 is rotatably supported via a pin-shaped fulcrum 7c at a position behind the back check wire 9a of the wippen 6 at a corner portion of the base portion 7a and the hammer protruding portion 7b. ing. A jack spring 10 is attached between the base portion 7 a and the wippen 6. The jack spring 10 is constituted by a coil spring, and is used to bias the jack 7 as described later when the key is depressed, and has a predetermined spring constant.

  Due to the weight of the action 3 as described above, the clockwise moment of FIG. 1 acts on the pin-shaped fulcrum 6b of the wippen 6 due to the weight of the jack 7 and the wippen 6 and the like. Further, a regulating button 13 is provided above the base portion 7 a of the jack 7. The regulating button 13 is provided for each key 4 via a plurality of regulating brackets 14 provided on the center rail 16 and a regulating rail 15 attached to the front end portion and extending in the left-right direction. (Only one is shown).

  The hammer 1 is also provided for each key 4 (only one is shown), and includes a bat 20, a hammer head 22, a catcher 24 and the like as shown in FIG. The bat 20 is formed in a predetermined shape using, for example, a synthetic resin, and is supported at the lower end portion thereof on the fulcrum 20b of the bat 20 so that the hammer 1 can rotate. ing. Further, the butt flange 25 is fixed to the center rail 16 at the lower end thereof.

  A hammer shank 21 is erected on the upper surface of the bat 20. The hammer shank 21 is formed in an elongated bar shape having a circular cross section, extends in the vertical direction, and a hammer head 22 is provided at an upper end portion thereof. The hammer head 22 has a hammer wood 22a and a hammer felt 22b, and opposes a string S vertically stretched rearward. The hammer wood 22a extends rearward and obliquely upward from the hammer shank 21, and its rear portion is tapered and thin. A hammer felt 22b is wound around the tapered portion, and the hammer felt 22b strikes the string S when the key is depressed.

  Further, the bat 20 is provided with a catcher shank 23. The catcher shank 23 is formed in a bar shape having a predetermined diameter and a circular cross section, and extends forward and obliquely downward from the front surface of the bat 20. The catcher 24 is provided at the front end of the catcher shank 23 and faces the front back check 9. The catcher 24 is formed in a block shape, and a catcher skin 24a made of, for example, a fiber material is attached to the front surface thereof.

  A mounting hole 24b is formed in the center of the catcher 24 so as to penetrate the catcher 24 in the left-right direction. The mounting hole 24b is formed, for example, in a circular cross section, and the diameter thereof varies between the sound ranges of the key 4 although not shown. For example, the diameter of the mounting hole 24b is set to a predetermined value for each of the predetermined low sound range, medium sound range and high sound range, and the low sound range is the largest and the high sound range is the smallest.

  A weight 26 is attached to the attachment hole 24b. The weight 26 is made of a metal having a large specific gravity such as iron, brass, lead, or tungsten, and is formed in a columnar shape having a diameter slightly larger than the diameter of each mounting hole 24b for each sound range. Yes. That is, the weight 26 is the heaviest for the low sound range and the lightest for the high sound range. Such a weight 26 is press-fitted into the attachment hole 24 b and attached in a state where it is embedded in the catcher 24.

  With the configuration of the hammer 1 as described above, a clockwise moment due to the weight of the hammer 1 to which the weight of the weight 26 is added acts around the fulcrum 20b. Further, a bat spring 20a is provided between the bat 20 and the hammer shank 21, whereby the hammer 1 is urged clockwise. In the key release state, the hammer 1 is rotated clockwise by the moment and the urging force, and the hammer thrust-up portion 7b of the jack 7 is a thrust-up portion 20c constituted by the front end portion of the bottom surface of the bat 20. In a state where it is engaged from below.

  Further, behind the action 3, a damper 27 is provided for each key 4 (only one is shown). The damper 27 is attached to a damper flange 27b attached to the center rail 16 via a pin-shaped fulcrum 27f so as to be rotatable, and to the upper side of the damper lever 27c via a damper wire 27d. The damper head 27a and the damper lever spring 27e that urges the damper 27 toward the string S side. The damper 27 is for stopping the sound when the damper head 27a abuts against the string S by the urging force of the damper lever spring 27e when the key is released.

  Hereinafter, a series of operations from the start to the end of the key pressing of the action 3 and the hammer 1 will be described with reference to the static touch characteristic graph shown in FIG. When the performer depresses the key 4 from the key release state of FIG. 1, the key 4 is rotated about the balance pin 5a in the clockwise direction by the key depression force, and at the rear end thereof. The placed whippen 6 is rotated upward (counterclockwise) by being pushed up by the key 4. As the whippen 6 rotates, the jack 7 and the back check 9 provided on the whippen 6 are moved together, and the hammer 1 is pushed up by the hammer push-up portion 7b of the jack 7, It turns counterclockwise toward the rear string S.

  That is, when the key pressing force acts on the whippen 6 via the key 4, the action 3 rotates against the moment around the fulcrum 6 b of the whippen 6 and also via the key 4, the whippen 6 and the jack 11. By acting on the hammer 1, the hammer 1 rotates against the moment around the fulcrum 20 b of the bat 20. At this time, the reaction force according to the moments around the fulcrums 20b, 6b and 5a of the hammer 1, action 3 and key 4 is given to the performer as touch weight.

  Immediately after the start of key pressing, the touch weight remains substantially constant (section A in FIG. 3). In the present embodiment, since the weight 26 is added to the catcher 24 of the hammer 1, the moment around the fulcrum 20b is increased correspondingly, and the touch weight is increased as a whole.

  When the whippen 6 rotates to a predetermined angle after the key is pressed, the spoon 11 provided at the rear end of the whippen 6 comes into contact with the lower end of the damper lever 27c, thereby causing the damper lever 27c to move to the damper lever spring 27e. Turn clockwise against the biasing force. As a result, the damper head 27a is separated from the string S, and the string S can be vibrated. As described above, while the spoon 11 rotates the damper lever 27c, the touch weight is slightly larger than that immediately after the start of key pressing by the urging force of the damper lever spring 27c (section B).

  When the whippen 6 is further rotated to a predetermined angle, the front end portion of the base portion 7a of the jack 7 comes into contact with the regulating button 13 from below. As a result, the jack 7 tries to turn clockwise against the urging force of the jack spring 10 with respect to the wippen 6 by the upward movement being restricted by the regulating button 13. At this time, a reaction force corresponding to the moment due to the weight of the hammer 1 is generated around the fulcrum 20b of the hammer 1, and this reaction force increases until the hammer push-up portion 7b of the jack 7 comes off the bat 20. The touch weight increases abruptly (section C). In the present embodiment, since the weight 26 is added to the catcher 24 of the hammer 1, the moment around the fulcrum 20 b is increased correspondingly, and the touch weight at this time is also increased correspondingly.

  Then, the hammer push-up portion 7 b is disengaged forward (let off) from the bat 20 and is detached from the hammer 1, whereby the jack 7 is rotated clockwise with respect to the wippen 6. Due to this let-off, the weight of the hammer 1 is suddenly lost from the touch weight of the key 4, so that the touch weight is rapidly reduced (section D). Thereby, a let-off feeling is given to the performer. The hammer 1 is rotated by inertia even after the jack 7 is detached, strikes the string S, and vibrates the string S to generate a performance sound. Then, the hammer 1 starts returning to the clockwise direction by the repulsive force of the string S.

  On the other hand, when the front end portion of the key 4 comes into contact with the front rail (not shown) of the flange 5 and the key pressing is completed, the key 4 can no longer be rotated. Thus, the touch weight increases rapidly (section E).

  After hitting the string, the hammer 1 is rotated back in the clockwise direction, and is locked by the catcher 24 coming into contact with the back check 9 moving upward together with the wippen 6 in the middle. Thereby, the back stop of the hammer 1 is performed, and the return rotation of the hammer 1 is temporarily stopped, thereby preventing the hammer 1 from rebounding.

  As the key depression is completed and the key 4 is released, the locked state of the hammer 1 is released, whereby the hammer 1 resumes the return rotation. In parallel with this, the key 4 and the action 3 are also returned and rotated to return to the key release state shown in FIG. 1, and a series of operations at the time of key depression and key release is completed.

  As described above, according to the present embodiment, the moment around the fulcrum 20b is increased by the weight 26, so that the reaction force from the hammer 1 when the key is depressed increases, thereby increasing the touch weight. can get. Further, since the moment around the fulcrum 20b is increased, the letoff load immediately before the letoff is increased as compared with the conventional hammer, and as a result, the amount of change in the touch weight before and after the letoff can be increased. Thereby, the performer can obtain a clear let-off feeling similar to a grand piano. Therefore, with this upright piano, it is easy to grasp the timing of the let-off, making it easier to control the hammer striking speed by controlling the strength of the touch and realizing high performance with excellent expressive power. .

  Further, the catcher 24 is located farther from the fulcrum 20 b than the raised portion 20 c where the jack 7 engages with the bat 20. Therefore, by attaching the weight 26 to the catcher 24 far from the fulcrum 20b, a moment around the fulcrum 20b by the weight 26 can be effectively added, and the touch weight and letoff load added thereby can be effectively increased. Can get to. As a result, the weight conventionally provided on the key can be reduced or omitted. In addition, the catcher 24 is usually provided to lock the hammer 1 that returns and rotates after stringing to the back check 9. Therefore, the hammer 1 according to the present invention can be easily and inexpensively configured simply by attaching the weight 26 using such existing components.

  Further, the weight 26 is attached to each hammer 1, and the weight of the weight 26 is set to be largest in the low sound range and lightest in the high sound range. Accordingly, it is possible to obtain a touch weight characteristic according to the range of the grand piano that the moment around the fulcrum 20b and the touch weight added thereby are large on the low sound side and small on the high sound side.

  Further, the weight 26 is attached in a state of being embedded in an attachment hole 24 b formed in the catcher 24. Thereby, the operation of the components such as the hammer 1 itself and the action 3 is not hindered by the weight 26, and therefore, the smooth operation of the hammer 1 and the action 3 can be ensured.

  FIG. 4 shows a hammer 30 according to the second embodiment. In the first embodiment, the weight 26 is attached to the catcher 24, but in the present embodiment, only the weight is attached to the catcher shank. Hereinafter, the same reference numerals are given to the components common to the hammer 1 of the first embodiment, and this difference will be mainly described.

  The catcher shank 31 of the hammer 30 extends obliquely downward from the bat 20, and a catcher 32 is provided at the front end thereof so as to face the back check 9. The catcher shank 31 is formed with a total of three attachment holes 31a at the front end, the center, and the rear end, and each attachment hole 31a penetrates the catcher shank 31 in the left-right direction. The cross section of the attachment hole 31a is formed, for example, in a circular shape, and the diameter thereof is different for each sound range. For example, the low sound range is the largest and the high sound range is the smallest (not shown). A weight 33 is attached to each attachment hole 31a.

  The weight 33 is made of the same material as that of the first embodiment, and is formed in a columnar shape having a slightly larger diameter than the mounting hole 31a in accordance with the diameter of the mounting hole 31a that is different for each sound range. Further, the weight 33 is press-fitted into the attachment hole 31 a and attached in a state of being embedded in the catcher shank 31. Other configurations are the same as the hammer 1 of the first embodiment.

  As described above, according to the present embodiment, since the three weights 33 in total are attached to the catcher shank 31 extending forward from the bat 20, the static touch characteristics similar to those in FIG. 3 can be obtained. The effect mentioned above by embodiment can be acquired similarly.

  FIG. 5 shows a hammer 40 according to the third embodiment. This embodiment is different from the first and second embodiments only in that weights are attached to both the catcher shank and the catcher. Hereinafter, the same reference numerals are given to the components common to the hammer 1 of the first embodiment, and this difference will be mainly described.

  A catcher 24 is provided at the front end of a catcher shank 41 that extends forward from the bat 20 of the hammer 40. Similar to the first embodiment, the catcher 24 has an attachment hole 24a, and a weight 26 is attached to the attachment hole 24a.

  The catcher shank 41 is formed with a mounting hole 41a at the front end of the catcher shank 41 and immediately behind the catcher 24, and a weight 42 is attached to the mounting hole 41a. The configurations of the mounting holes 41a and the weights 42 are the same as those in the second embodiment described above.

  As is apparent from the above configuration, according to the present embodiment, the static touch characteristics similar to those in FIG. 3 can be obtained, and the effects described above according to the first and second embodiments can be obtained. Further, since the weights 42 and 26 are respectively disposed at the front end portion of the catcher shank 41 and the catcher 24, that is, as far as possible from the fulcrum 20b, the moments around the fulcrum 20b by the weights 42 and 26, and thereby The added touch weight, letoff load, and the like can be obtained more effectively.

  In addition, this invention can be implemented in various aspects, without being limited to the described embodiment. For example, in each of the above-described embodiments, the weight is embedded in the catcher shank and / or the attachment hole formed in the catcher. However, the present invention is not limited to this, and the catcher may be used as long as it does not hinder the operation of other components. A weight may be externally attached to the shank and / or catcher. In each embodiment, the sound range is divided into a total of three ranges, a low range, a mid range, and a high range, and weights that are different from each other are attached to each other, so that the touch weight varies between the ranges. However, the present invention is not limited to this. For example, the characteristics of the touch weight may be set more finely by subdividing the sound range and setting the weight of the weight more finely according to the sound range.

  Furthermore, the number, weight, and material of the weight attached to the catcher shank and / or the catcher are not limited to those exemplified in the embodiment, and may be appropriately changed according to the required touch weight of the key 4. . 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 hammer, action, etc. by 1st Embodiment of an upright piano in a key release state. It is a perspective view which shows the hammer of FIG. It is a figure which shows the static touch characteristic when the key of FIG. 1 is pressed. It is a perspective view which shows the hammer by 2nd Embodiment. It is a perspective view which shows the hammer by 3rd Embodiment. It is a figure which shows roughly the static touch characteristic of the conventional upright piano (a) and a grand piano (b), respectively.

Explanation of symbols

1 hammer 4 key 7 jack 20 bat 20b fulcrum (rotating fulcrum)
21 Hammer Shank 22 Hammer Head 23 Catcher Shank 24 Catcher 24b Mounting Hole 26 Weight 30 Hammer 31 Catcher Shank 31a Mounting Hole 32 Catcher 33 Weight 40 Hammer 41 Catcher Shank 41a Mounting Hole 42 Weight S String

Claims (4)

An upright piano that rotates by being pushed up by a jack as the key is pressed, and generates a performance sound by striking a string stretched backward after the jack is released during the rotation Hammer of
A bat that is pivotally supported by a pivoting fulcrum, engages with the jack in a key release state, and pivots about the pivoting fulcrum by being pushed up by the jack as the key is depressed;
A hammer shank standing on the bat and extending in the vertical direction;
A hammer head provided at the upper end of the hammer shank for striking the string;
A catcher shank projecting forward from the bat;
A catcher provided at the front end of the catcher shank;
A weight attached to at least one of the catcher shank and the catcher to give a touch weight when the key is pressed;
Upright piano hammer characterized by comprising:   The hammer of an upright piano according to claim 1, wherein the weight is attached to a front end portion of the catcher shank and the catcher.   The upright according to claim 1 or 2, wherein an attachment hole is formed in at least one of the catcher shank and the catcher, and the weight is attached in a state of being embedded in the attachment hole. Piano hammer. The hammer is composed of a plurality of hammers provided for each of the plurality of keys, and the weights are respectively attached to the plurality of hammers,
The hammer of an upright piano according to any one of claims 1 to 3, wherein the weight of the weight is set to be larger toward a lower sound range side for each predetermined sound range.

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