JP2005345896A - Action of upright piano - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an action of an upright piano of a simple structure, with which repeated touches near the pounding positions of a keyboard is possible. <P>SOLUTION: A rod 67 at the front end of a lever 64 supported freely turnably about a shaft 65 parallel to the axis of rotation of a hammer assembly 21 and a wippen 51 is engaged with a hook 43 attached to a catch 41 fixed to a bat 31 and a spring 63 mounted at one end on the lever 64, and the other end of the spring 63 and a back check 61 fixed to the wippen 51 are connected by a cord 62, and thereby the hammer assembly 21 is energized to be turned in the striking direction at the releasing of a hammer stop state of the keyboard 95, to delay resetting of the hammer assembly 21 to the static position prior to striking of the hammer assembly 21, and to promote resetting of a jack 81 connecting to the wippen 51 to a driving position of the bat 31. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an action of an upright piano.

FIG. 6 shows a stationary state before stringing of the action of the conventional upright piano.
Conventionally, the action 100 of the upright piano has a whip pen 111, a jack 113, and a bat 114 as a transmission unit for guiding the movement of the keyboard 110 to the string of the hammer assembly 116.

  When the keyboard 110 is depressed, the capstan 119 moves upward, and the wipen 111 rotates counterclockwise. When the wipen 111 rotates in the counterclockwise direction, the jack 113 connected to the wipen 111 pushes up the bat 114 to rotate the hammer assembly 116 in the counterclockwise direction, and the string 121 is hit by the hammer assembly 116. .

  The hammer assembly 116 rotates in the clockwise direction after striking a string, and a so-called hammer stop state in which the catcher 115 is in contact with the back check 112 while the key is pressed is maintained.

  However, in the conventional action, when the keyboard 110 is returned slightly upward from the pressed position to move from the key depression to the next string striking, the wiper 111 is moved in conjunction with the upward movement of the key depression portion of the keyboard 110. Start rotating clockwise. Then, the back check 112 fixed to the wipen 111 starts to rotate in the clockwise direction in conjunction with the clockwise rotation of the wipen 111, and the catcher 115 is released from the hammer stop state in contact with the back check 112. A gap is generated between the catcher 115 and the back check 112. At that moment, the bat 114 that is constantly urged clockwise by the bat spring 123 starts to rotate clockwise, and the bat 114 returns to a position where the jack 113 can push up the butt 114 before rotating. It will turn.

  For this reason, the jack 113 is prevented from returning by the bat 114, and cannot return to the position where the bat 114 is driven unless the keyboard 110 returns to a position near the rest position. When the next key depression is performed in a state where the jack 113 does not return, the wipen 111 starts to rotate counterclockwise, but the jack 113 does not drive the bat 114, so that the hammer assembly 116 does not reach the string. The catcher 115 is held in contact with the back check 112, and the keyboard 110 is no longer moved.

That is, in the upright piano action, there is a problem that continuous hitting cannot be performed unless the keyboard 110 is returned to the position close to its rest position.
In order to deal with such a problem, the following patent document provides a fixing member for the catcher shank extending from the bat, attaches a repetition lever to the end of the fixing member, and always rotates the repetition lever counterclockwise with a spring. A mechanism is described that urges the bat with the repetition lever attached counterclockwise by energizing it in a counterclockwise direction to restrict the rotation of the hammer assembly in the clockwise direction when the hammer stop is released. ing.
JP-A-5-323953

  However, the mechanism described in the above document requires the addition of new parts with complicated shapes such as fixing members and repetition levers, and the addition of these new parts increases the number of action parts and makes the structure complicated. As a result, the assembly man-hours further increase, resulting in an increase in action manufacturing costs.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an action of an upright piano having a simple structure that can be repeatedly hit in the vicinity of a pressed position of a keyboard stroke.

  In order to achieve the above-mentioned object, the action of the upright piano according to claim 1 includes a wiper that rotates in conjunction with a movement of a keyboard, a bat driven by a jack connected to the wiper, and the bat A catcher provided integrally; a hammer assembly that rotates together with the bat and strikes a string; and a back check that receives the catcher that rotates in a direction opposite to the stringing direction of the hammer assembly after stringing. In the action of the upright piano, the hook provided on the catcher, the lever that is rotatably supported by the piano body, and engages with the hook when released from the hammer stop state, and the hook is engaged. Rotation limiting means for limiting the rotation of the lever.

  According to such a configuration, the lever can be urged to rotate clockwise using the rotation limiting means when released from the hammer stop state, and the return rotation of the hammer assembly can be delayed. In the meantime, since the jack returns to the position where the bat is driven, it is possible to improve the repeatability near the pressed position of the keyboard stroke.

  According to a second aspect of the present invention, in the action of the upright piano according to the first aspect, the rotation restricting means includes a spring attached to the lever, and a cord connecting the spring and the back check. It is characterized by having.

  According to such a configuration, since the cord connected to the back check pulls the spring, an urging force is generated in the spring, and the lever can be restricted by the urging force.

According to a third aspect of the present invention, in the action of the upright piano according to the first aspect, the hook is a cylindrical member without a top plate and a bottom plate.
According to such a configuration, since the hook structure is simple, adding the hook does not complicate the action structure.

According to a fourth aspect of the present invention, in the action of the upright piano according to the third aspect, the hook is formed integrally with the catcher.
According to such a configuration, it is possible to reduce the number of action parts and the number of assembly steps.

The invention according to claim 5 is characterized in that, in the action of the upright piano according to claim 2, the spring is a hook spring.
According to such a configuration, since the structure of the spring is simplified, it is possible to prevent the structure of the action from becoming complicated by adding the spring.

  According to a sixth aspect of the present invention, in the action of the upright piano according to the first aspect, the rotation restricting means includes a contact portion of the lever that contacts the upper surface of the back check.

  According to such a configuration, since the lower surface of the lever contacts the upper surface of the back check when released from the hammer stop state, the rotation of the lever is restricted, and the return rotation of the hammer assembly can be delayed. In the meantime, since the jack returns to the position where the bat is driven, it is possible to improve the repeatability near the pressed position of the keyboard stroke.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a side sectional view of an action of an upright piano according to the present invention. A schematic structure of the entire action 1 will be described with reference to FIG.

  In the following description, the side closer to the player of the keyboard 95 in FIG. The side away from the performer in FIG. 1 (the R direction side in FIG. 1) is called the back of the action 1. The upper side in FIG. 1 (the U direction side in FIG. 1) is called the upper side of action 1, and the lower side in FIG. 1 (the D direction side in FIG. 1) is called the lower side of action 1. Also, the direction perpendicular to the paper surface of FIG. 1 is referred to as action 1 or the left-right direction of the piano.

A center rail 91, a hammer rail 23, and a regulating rail 36 that extend in the left-right direction across the width direction of the keyboard 95 are fixed to the piano body.
The center rail 91 is a long member extending in the width direction (left-right direction) of the keyboard 95. The center rail 91 is fixed to the piano body by brackets 92 at several locations in the left-right direction.

  A damper flange 76 is fixed on the upper surface of the center rail 91. A long damper lever 71 extending in the vertical direction is rotatably attached to the damper flange 76 via a pin 77. At the upper end of the damper lever 71, a damper wire 73 is erected upward. A damper head 74 is fixed to the upper end portion of the damper wire 73. A damping unit 75 is attached to the damper head 74. The damping unit 75 is in contact with the string 11.

  A butt flange 33 is fixed to the upper end portion of the center rail 91, and a wiper flange 53 is fixed to the lower end portion of the center rail 91. The butt frenzy 33 and the vipen frenzy 53 will be described later.

The hammer rail 23 extends in the width direction of the keyboard 95 over the entire length of the center rail 91. A hammer rail cross 24 is attached to the side surface of the hammer rail 23.
The regulating rail 36 extends in the width direction of the keyboard 95 along the center rail 91. A regulating button 35 that can be adjusted in the vertical direction with a screw is attached to the regulating rail 36.

The action 1 shown in FIG. 1 includes a wipen 51, a jack 81, a bat 31, a hammer assembly 21, a damper lever 71, and the like.
The wipen 51 is a plate-like long member extending in the front-rear direction (F or R direction in FIG. 1) of the piano. The wipen 51 is rotatably attached to a wipen flange 53 fixed to the lower end portion of the center rail 91 via a pin 54.

  A bridle wire 69 and a back check 61 are fixed to the upper surface of the front end portion in the front-rear direction of the wipen 51 in order from the front side, and a jack spring 86 is attached to the rear side of the back check 61. One end of a bridle tape 68 is connected to the upper end of the bridle wire 69, and the other end of the bridle tape 68 is connected to the catcher shank 42. The bridle tape 68 is for preventing the string 11 from being hit twice by causing the hammer assembly 21 to bounce back by causing the hammer assembly 21 to rotate back and forth. The back check 61 is for elastically receiving the catcher 41 fixed to the tip end portion of the catcher shank 42 substantially orthogonal to the hammer shank 22 of the hammer assembly 21. The jack spring 86 biases the jack small 85 in the counterclockwise direction.

A wipen heel 52 is provided at the lower end of the wipen 51 on the front end side in the front-rear direction. The lower surface of the wipen heel 52 is supported by a capstan 55.
A jack flange 82 that protrudes upward is fixed to the upper surface of the central portion of the wiper 51 in the front-rear direction. A jack 81 is rotatably attached to the jack flange 82 via a pin 83. The jack 81 will be described later in detail.

A damper spoon 78 is attached to the rear end side of the wiper 51 in the front-rear direction.
The damper spoon 78 rotates the damper lever 71 in the clockwise direction against the urging force of the damper lever spring 72 when the wiper 51 rotates counterclockwise by the key depression, and the damper damping portion 75 is moved from the string 11. It is for separating.

  The jack 81 is a substantially L-shaped long member, and includes a long jack 84 that extends obliquely upward and a jack small 85 that is substantially orthogonal to the jack 84 and shorter than the jack 84. Has been. The upper end surface of the jack jack 84 is in contact with the bat skin 37 that covers the lower surface of the bat 31. A jack spring 86 is attached to the jack small 85. The jack 81 is a substantially L-shaped bent portion and is rotatably attached to the jack flange 82 via the pin 83 as described above. Accordingly, the jack 81 is urged by the jack spring 86 so as to always rotate counterclockwise.

  The bat 31 is attached so as to be rotatable in a clockwise direction or a counterclockwise direction via a pin 34 provided in a butt flange 33 fixed to the upper portion of the center rail 91. A hammer shank 22 extending obliquely upward and a catcher shank 42 extending in a direction substantially perpendicular to the hammer shank 22 are fixed to the bat 31. A hammer assembly 21 is fixed to the upper end portion of the hammer shank 22. A catcher 41 is fixed to the tip of the catcher shank 42. A bat spring 32 is attached to the rear of the bat 31 to constantly urge the bat 31 in the clockwise direction. The butt spring 32 prevents the hammer assembly 21 from coming into contact with the string 11 again after striking the string 11. Further, a bat skin 37 that covers the lower surface of the bat 31 is attached to the lower surface of the bat 31.

  The hammer assembly 21 is attached to the tip of a hammer shank 22 fixed to the bat 31. The hammer shank 22 is in contact with a hammer rail cross 24 attached to the hammer rail 23 in a stationary state where the key is not depressed. When the hammer shank 22 rotates counterclockwise, the hammer assembly 21 strikes the string 11 to generate a string-sounding sound.

  The damper lever 71 is supported by the damper flange 76 so as to be rotatable around a pin 77 provided in the damper flange 76. The damper lever 71 is biased counterclockwise by a damper lever spring 72 having one end attached to the damper flange 76 and the other end attached to the damper lever 71. As a result, the damper damping unit 75 normally presses the string 11 to prevent the string from resonating when another string is struck.

  Next, referring to FIG. 2 in which the portion A of FIG. 1 is enlarged, a delay mechanism 60 for delaying the return rotation of the hammer assembly 21 in the direction of the stationary position before stringing when released from the hammer stop state. explain.

  The delay mechanism 60 shown in FIG. 2 includes a hook 43, a lever 64, a rod 67, a cord 62, and a spring 63. The hook 43 is fixed to the upper part of the catcher 41 provided at the tip of the catcher shank 42. The hook 43 is a cylindrical member without a top plate and a bottom plate. With such a structure, the structure of the action 1 is not complicated by adding a hook because the structure of the hook is simple. The lever 64 is a long member. The lever 64 is rotatably supported by the lever flange 66 via a pin 65 provided on the lever flange 66. The lever flange 66 is fixed to the piano body. A rod 67 is provided at the tip of the lever 64, and one end 63a of a spring 63 is fixed to the opposite side. The rod 67 can be engaged with the hook 43 by penetrating a cylindrical member. The cord 62 connects the other end 63 b of the spring 63 and the back check 61. The spring 63 urges the lever 64 so as to rotate clockwise about the pin 65. Therefore, the rod 67 at the tip of the lever 64 is in contact with the hook 43. The spring 63 is a hook spring in this embodiment. By using the hook spring, the structure of the spring 63 is simplified, so that the structure of the action 1 can be prevented from becoming complicated.

Next, the operating state of this embodiment will be described with reference to FIGS.
FIG. 3 is a diagram showing the action state of the action. FIG. 3A is a diagram showing a stationary position before the keyboard 95 is pressed. FIG. 3B is a diagram illustrating the key pressing duration state. FIG. 3C is a diagram showing a state in which the key pressing has started to be released.

  When the keyboard 95 is pushed downward, the rear end portion (R direction end portion in FIG. 1) of the keyboard 95 rises, and the capstan 55 fixed to the rear end portion of the keyboard 95 pushes up the wipen 51 in the counterclockwise direction. Turn to. When the wipen 51 starts to rotate counterclockwise, the jack jack 84 supported by the wipen 51 pushes up the bat 31 while being connected to the bat 31. The bat 31 is driven to rotate in the counterclockwise direction. As described above, when the bat 31 starts to rotate by pressing the keyboard 95, the hammer assembly 21 fixed to the bat 31 rotates counterclockwise to strike the string 11. Further, the catcher 41 fixed to the bat 31 also starts rotating.

  At the same time, the back check 61 fixed to the pen 51 also rotates counterclockwise, and the cord 62 extending from the back check 61 moves the end of the spring 63 attached to the lever 64 to the rear (R direction in FIG. 1). ), The turning force of the lever 64 to rotate the lever 64 in the clockwise direction increases.

  On the other hand, as described above, the catcher 41 fixed to the bat 31 also rotates and rises. However, when the key is depressed, the catcher 41 rises faster than the lever 64, so that the rod 67 at the tip of the lever 64 The hook 43 does not come into contact.

  After the hammer assembly 21 hits the string 11, the hammer assembly 21 is rotated and returned, and the catcher 41 is elastically received by the back check 61. During key pressing, the catcher 41 is held by the back check 61 as shown in FIG. On the other hand, when the lever 64 is pulled by the back check 61, the positional relationship between the hook 43 and the rod 67 is adjusted so that a slight gap is formed between the hook 43 and the rod 67. This state is maintained while the key is pressed.

  Therefore, when the keyboard 95 is released from the depressed state in preparation for the next string hitting, the catch of the catcher 41 by the back check 61 is loosened as shown in FIG. A slight gap occurs. This is the state released from the so-called hammer stop state. At this time, the hammer assembly 21 tries to rotate in the clockwise direction by the urging force of the butt spring 33, but the hook 43 attached to the catcher 41 tries to rotate in the clockwise direction by the urging force of the spring 63. Therefore, the rotation of the lever 64 to which the rod 67 is attached is restricted. Therefore, the return rotation of the hammer assembly 21 toward the stationary position is delayed. During this time, the jack jack 84 returns to a position where the bat 31 can be pushed up, and prepares for the next string hitting. When the wiper 51 is further rotated back, the biasing force of the spring 63 is weakened, and the hammer assembly 21 starts rotating again.

  In this way, it is possible to repeatedly hit the keyboard stroke near the push-off position, which was impossible with conventional upright piano actions, and improve the repeatability near the keyboard stroke push-off position.

  In addition, with regard to touch when operating the keyboard, the action of a grand piano always feels the weight of the hammer assembly at the fingertip when the key is pressed, and there is a sense that the keyboard and hammer assembly are in sync. It is one of the “good touches” of the action. This is due to the positional relationship between the center of gravity of the hammer assembly and its rotation axis. On the other hand, in the action of the upright piano, the center of gravity is located above the rotation axis of the hammer assembly, so the hammer assembly is preceded by the light key press, and the player is dissatisfied with the lack of synchronization. .

  In order to obtain a sense of synchronism, it is conceivable to add mass at an appropriate position on the right side (F direction side in FIG. 1) of the hammer shank 22 of the hammer assembly 21 shown in FIG. However, the load on the jack of the hammer assembly 21 released from the back check 61 when the key is released from the keyboard 95 also increases, and the jack cannot be fully returned, resulting in inconvenience that the repeatability is deteriorated.

  However, according to the present invention, even if mass is added to an appropriate position on the right side of the hammer shank 22 of the hammer assembly 21 (F direction side in FIG. 1), the return of the hammer assembly 21 is delayed, thereby improving the repeatability. Will not be disturbed.

  Therefore, according to the present invention, it is possible to repeatedly hit the keyboard stroke in the vicinity of the fully pressed position, and to obtain a feeling close to the synchrony that is the “goodness of touch” of the action of the grand piano.

  In addition, according to the present embodiment, since the parts added to the action 1 are simple parts such as the hook 43, the lever 64, the spring 63, and the cord 62, the action 1 can be added even if these parts are added. The structure is not complicated, and no special space is required for the action 1 for the arrangement of these parts. Therefore, the manufacturing cost does not increase significantly.

FIG. 5 shows a second embodiment.
The delay mechanism 60a shown in FIG. 5 includes a hook 43, a lever 64a, a rod 67, and a back check 61b. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  A hook 43 is fixed to the upper part of the catcher 41. The lever 64a is a long member. The lever 64a is rotatably supported by the lever flange 66 via a pin 65 provided on the lever flange 66.

  A rod 67 is provided at the tip of the lever 64a. The rod 67 is engaged with the hook 43 by passing through the cylindrical hook 43. In the present embodiment, the contact portion 64b below the tip of the lever 64a has a shape that substantially matches the locus (rotation radius) of the back surface 61b of the back check 61a.

  As a result, the tip end portion 61b of the back check 61 abuts against the abutting portion 64b of the lever 64a regardless of the rotation of the wiper 51. As a result, the lever 64a stops temporarily rotating, and thus the rotation of the lever 64a is limited. Is done. Therefore, the return rotation of the hammer assembly 21 can be delayed through the hook 43 that engages with the rod 67 at the tip of the lever 64a. During this time, the jack jack 84 returns to a position where the bat 31 can be pushed up, and prepares for the next string hitting.

  In this way, it is possible to repeatedly hit the keyboard stroke near the push-off position, which was impossible with the action of the upright piano in the past, and improve the repeatability near the keyboard stroke push-off position.

  Further, according to the second embodiment, since the parts added to the action 1 are simple parts such as the hook 43 and the lever 64a, the structure of the action 1 is complicated even if these parts are added. There is no need to provide extra space for action 1 for these component placements. Therefore, the manufacturing cost does not increase significantly.

  Note that the hook 43 can be attached to the catcher 41 by, for example, bonding or a screw after it has been prepared in advance. Alternatively, the hook 43 may be formed integrally with the catcher 41. Thereby, the number of parts of action 1 can be reduced, and the number of assembly steps can be reduced.

  The hook 43 may be a substantially L-shaped hook 43a as shown in FIG. Thereby, the shape of the hook itself and the attachment to the catcher 41 can be further simplified.

  Furthermore, the rod 67 can be attached to the lever 64 after being previously prepared as a separate object. Alternatively, the rod 67 may be formed integrally with the lever 64. Thereby, the number of parts of action 1 can be reduced, and the number of assembly steps can be reduced.

  Although the embodiment of the present invention has been described above, the rotation limiting means according to claim 1 or 2 corresponds to the cord 62 and the spring 63. The rotation restricting means according to claim 6 corresponds to the contact portion 64b of the lever 64a.

It is a sectional side view of the action of an upright piano. It is an enlarged view of the A part of FIG. It is a figure which shows the operating state of action. It is a figure which shows the hook of another shape. It is a figure which shows 2nd Embodiment. It is a figure which shows the action of the conventional upright piano.

Explanation of symbols

1 ... action, 11 ... string, 21 ... hammer assembly,
22 ... hammer shank, 23 ... hammer rail, 24 ... hammer rail cross, 31 ... butt, 32 ... butt spring, 33 ... butt frenzy,
34 ... Pin, 35 ... Regulating button, 36 ... Regulating rail, 37 ... Bat skin, 41 ... Catcher, 42 ... Catcher shank,
43 ... Hook, 51 ... Ui Pen, 52 ... Ui Pen Heel,
53 ... Wipen Frenzy, 54 ... Pin, 55 ... Capstan,
60, 60a ... delay mechanism, 61 ... back check, 62 ... code,
63 ... Spring, 63a ... One end, 63b ... Other end,
64, 64a ... lever, 64b ... contact part, 65 ... pin,
66 ... Lever Frenzy, 67 ... Rod, 68 ... Bridle tape,
69 ... Bridle wire, 71 ... Damper lever,
72 ... damper lever spring, 73 ... damper wire,
74 ... Damper head, 75 ... Damping unit, 76 ... Damper flange,
77 ... pin, 78 ... damper spoon, 81 ... jack,
82 ... Jack Frenzy, 83 ... Pin, 84 ... Jack,
85 ... Jack small, 86 ... Jack spring, 91 ... Center rail,
92 ... Bracket, 100 ... Action, 110 ... Keyboard,
111 ... Wipen, 112 ... Back check, 113 ... Jack,
114 ... bat, 115 ... catcher, 116 ... hammer assembly,
117 ... Regulating button, 118 ... Center rail,
119: Capstan, 121 ... String, 122 ... Damper lever 123 ... Butt spring

Claims (6)

A hammer that rotates in conjunction with the movement of the keyboard, a bat driven by a jack connected to the wipen, a catcher provided integrally with the bat, and a hammer that rotates with the bat and strikes a string. In an action of an upright piano comprising an assembly and a back check that receives the catcher that rotates in a direction opposite to the direction of stringing of the hammer assembly after stringing,
A hook provided on the catcher;
A lever that is pivotally supported by the piano body and engages with the hook when released from the hammer stop state;
An action of an upright piano, comprising: a rotation limiting means for limiting rotation of the lever engaged with the hook. 2. The action of an upright piano according to claim 1, wherein the rotation limiting means includes a spring attached to the lever, and a cord connecting the spring and the back check. The action of the upright piano according to claim 1, wherein the hook is a cylindrical member without a top plate and a bottom plate. The action of the upright piano according to claim 3, wherein the hook is formed integrally with the catcher. The upright piano action according to claim 2, wherein the spring is a saddle spring. 2. The action of an upright piano according to claim 1, wherein the rotation limiting means comprises a contact portion of the lever that contacts the upper surface of the back check.

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