JP4851313B2 - Keyboard device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a keyboard device in which a sensor arranged near a hammer assembly need not to be removed, when, for example, regulation operation and exchanging operation of the hammer assembly are carried out, in the keyboard device equipped with the hammer assembly for striking a string by a hammer interlocking with a key, and the sensor for detecting hammer rotation operation as performance information. <P>SOLUTION: A shutter 151 is arranged between a bat 31 and a catcher 41, and a lower end section of a rotational member 121 of a shutter detection section 130 is supported so as to be rotatable to a fixed member 101 attached to a center rail 91, via a bearing unit. A plurality of pairs of sensors 135 and sensors 136 are attached to an upper end of the rotational member 121, and the rotational member 121 is rotated, and thereby, the plurality of pairs of sensors 135 and sensors 136 are moved from a position where rotation of the shutter is detected, to a retracting position when the regulation operation and the exchanging operation of the hammer assembly 20 are carried out. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention relates to a keyboard apparatus including a hammer assembly that strikes a string with a hammer that is linked to a key, and a sensor that can detect the rotation of the hammer as performance information, and more particularly to a technique that facilitates pacing work of the keyboard apparatus.

  2. Description of the Related Art Conventionally, there has been known a keyboard device that includes a hammer assembly that strikes a string with a hammer that is interlocked with a key, and a sensor that can detect the rotation of the hammer as performance information. For example, there is a keyboard device that is provided in the vicinity of a hammer assembly of a keyboard device and includes a sensor that is turned on / off in response to a predetermined angle of a rotation operation of a shutter provided on the hammer (see, for example, Patent Document 1). .

By the way, in a keyboard apparatus provided with the above-mentioned hammer assembly, a pacing operation for adjusting the tone of a sound produced by striking a string is periodically performed.
Such keyboard device pacing work, for example, tune the length of sound, is erected at the upper end of the damper lever so that the vibration damping part that holds down the strings properly holds down the strings. This is done by bending and adjusting the damper wire. The work of bending the damper wire is performed by a pacing work tool, a driver, or the like having a tip portion capable of holding the damper wire. Further, the pacing operation of the keyboard device is performed in a state where the hammer assembly is mounted on the keyboard device. However, the damper wire is disposed behind the keyboard device with respect to the sensor disposed in the vicinity of the hammer assembly. Therefore, for example, when the tip of the tool for pacing work is moved substantially horizontally from the front of the keyboard device to the damper wire, the tool for pacing work hits a sensor arranged in the vicinity of the hammer assembly, The tip of the tool may not move to the position of the damper wire. Therefore, when such a pacing operation of the keyboard device is performed, the sensor disposed in the vicinity of the hammer assembly may be temporarily removed from the vicinity of the hammer assembly.

  In such a keyboard device, when the above-described hammer assembly is damaged, an exchange operation for exchanging the hammer assembly is performed. The replacement operation of the hammer assembly is performed by removing the damaged hammer assembly from the keyboard apparatus and attaching the undamaged hammer assembly to the keyboard apparatus from above. For this reason, when the hammer assembly is taken out from the keyboard device, the catcher constituting the hammer assembly may hit a sensor disposed in the vicinity of the hammer assembly, and the hammer assembly may not move upward. Therefore, even when such a hammer assembly replacement operation of the keyboard apparatus is performed, the sensor disposed in the vicinity of the hammer assembly may be temporarily removed from the vicinity of the hammer assembly.

Patent Document 1:
Japanese Patent Laid-Open No. 2-1602929 (page 3)

  When such a pacing operation of the keyboard device and a replacement operation of the hammer assembly are performed, the sensor disposed in the vicinity of the hammer assembly is once removed from the hammer assembly, so that the pacing of the keyboard device not equipped with the sensor is performed. Compared with the work, the keyboard device provided with the sensor took longer time for the pacing work.

  In addition, when the sensor removed from the hammer assembly is returned to the original position after completion of the pacing operation of the keyboard device and the replacement operation of the hammer assembly, the relative position with respect to the shutter provided on the hammer is set. Since an operation for adjusting the mounting position of the sensor occurs for adjustment, there is a problem that the time required for the operation is further increased.

  The present invention has been made in view of the above problems, and in a keyboard device including a hammer assembly that strikes a string with a hammer that is linked to a key, and a sensor that can detect the rotation of the hammer as performance information, for example, pacing work It is an object of the present invention to provide a keyboard device that does not require removal of a sensor disposed in the vicinity of the hammer assembly when a hammer assembly is replaced.

  The keyboard device of the present invention made to solve the above-described problems (1: In this section, in order to facilitate understanding of the invention, “the best mode for carrying out the invention” is necessary as necessary. The components described in the column are shown in parentheses, but this description does not mean that the scope of the claims is limited.) Is an abbreviation of the swing axis when the key (95) swings. A bat (31) rotatable about a parallel rotation axis (34), a lower end connected to the upper part of the bat, rotated with the rotation of the bat, and a hammer capable of hitting the string (11) (21), and a hammer assembly (20) having a catcher (41) fixed to the front part of the bat via a catcher shank (42), and a damping part (which is located behind the bat and dampens the string) 75) Damper wire (73) And a elongated damper lever (71) for supporting from below by.

  The keyboard device is disposed between the bat and the catcher, is fixed to at least one of the bat and the catcher, and rotates with the rotation of the bat. The sensor (135, 136) that can output a signal indicating that when the bat is in proximity, and the sensor can be supported at a detection position that is close to the detected object that rotates as the bat rotates. Support means (130).

  The support means does not interfere with the sensor when the tip of the rod-like object is moved substantially horizontally from the front of the keyboard device toward the damper wire, and when the hammer assembly is taken out from the keyboard device substantially upward or to the keyboard device. The sensor is configured to be movable between a retracted position and a detected position, which are positions set in a region that does not interfere with the sensor when attached from substantially above.

  According to the keyboard device configured as described above, the following operational effects can be obtained. That is, the support means includes a sensor capable of outputting a signal indicating that when a detection object rotating with the rotation of the bat approaches the detection object rotating with the rotation of the bat. It supports at the detection position which is a position which can approach. The support means does not interfere when the tip of the rod-like object is moved substantially horizontally from the front of the keyboard device toward the damper wire, and is substantially upward when the hammer assembly is taken out from the keyboard device or substantially upward. The sensor is configured to be movable between a retracted position and a detected position, which are positions set in a region that does not interfere with the mounting. Therefore, for example, when detecting the turning motion of the hammer as performance information, the sensor that can output a signal indicating that when the detection target that rotates with the rotation of the bat approaches is provided by the support means. Therefore, it is preferable to be supported at a detection position that is close to the detected object that rotates as the bat rotates. In the keyboard device, for example, when a pacing operation or a hammer assembly replacement operation is performed, interference occurs when the tip of the rod-like object is moved substantially horizontally from the front of the keyboard device toward the damper wire by the support means. In addition, the sensor may be moved to a retracted position that is a position set in a region that does not interfere when the hammer assembly is removed from the keyboard device substantially upward or attached to the keyboard device from substantially above. This will be specifically described below.

  When performing the pacing operation of the keyboard device, for example, the tune operation of the sound length, as described in the above [Background Art] section, for example, the tip of a rod-like object such as a pacing tool Is moved substantially horizontally from the front of the keyboard device toward the damper wire disposed at a position behind the keyboard device rather than the sensor disposed in the vicinity of the hammer assembly, so that the sensor is disposed in the vicinity of the hammer assembly. If it is provided, the tip of the rod-shaped object may hit the sensor, and the tip of the rod-shaped object may not move to the position of the damper wire. Therefore, when the pacing operation of the keyboard device is performed, the support means is set at a position set in a region where interference does not occur when the tip of the rod-shaped object is moved substantially horizontally from the front of the keyboard device toward the damper wire. The sensor may be moved to a certain retreat position.

  When the hammer assembly is replaced, the damaged hammer assembly is removed upward from the keyboard device as described in the “Background Art” section above, so that the sensor is disposed in the vicinity of the hammer assembly. Otherwise, the hammer assembly may hit the sensor and the hammer assembly may not move upward. Therefore, when the hammer assembly replacement operation is performed, the position is set in a region that does not interfere when the hammer assembly is taken out from the keyboard device substantially upward by the support means or attached to the keyboard device from substantially above. The sensor may be moved to the retracted position.

  As a result, in the keyboard device, for example, when a pacing operation or a hammer assembly replacement operation is performed, the sensor is not removed from the hammer assembly by being moved to the retracted position. In addition, when the sensor removed from the hammer assembly is returned to the original position after completion of the pacing work of the keyboard device and after the replacement work of the hammer assembly, the hammer is moved by moving the sensor to the detection position. There is no need to adjust the mounting position of the sensor in order to adjust the relative position with the shutter provided on the.

  Therefore, according to the keyboard device configured as described above, the sensor is not removed from the hammer assembly when, for example, a pacing operation or a hammer assembly replacement operation is performed. Therefore, the sensor is removed from the hammer assembly. Compared to a certain keyboard device, the time required for the pacing operation and the hammer assembly replacement operation can be shortened.

  As a specific example of the retracted position, as set forth in claim 2, it is set in a region below a substantially horizontal plane including the upper end of the damper lever and ahead of a substantially vertical plane substantially parallel to the left-right direction including the front end of the catcher. Position.

  According to the keyboard device thus configured, for example, when a pacing operation or a hammer assembly replacement operation is performed, the support means includes a front side of the catcher below a substantially horizontal plane including the upper end of the damper lever. The sensor may be moved to a retracted position that is a position set in a region in front of a substantially vertical plane substantially parallel to the left-right direction. When the keyboard device is tuned, the damper wire is erected on the upper end of the damper lever, as described in the above [Background Art] section, so that the sensor is located on a substantially horizontal plane including the upper end of the damper lever. When the tip of the rod-shaped object such as a tool for pacing work does not hit the sensor when it is moved to the retracted position set in the lower area, the tip of the rod-shaped object does not touch the position of the damper wire. Can move up to. Further, when the hammer assembly is exchanged, the catcher constituting the hammer assembly hits the sensor as described in the above [Background Art] section, but the sensor is substantially in the left-right direction including the front end of the catcher. When the catcher that constitutes the hammer assembly does not hit the sensor when moved to the retracted position that is a position set in a region in front of the parallel substantially vertical plane, the hammer assembly can move upward. Therefore, according to the keyboard device configured in this way, the same effect as in the first aspect can be obtained.

  The support means includes a rotation member to which the sensor is fixed, and a detection stop member that stops the rotation of the rotation member to which the sensor is fixed in one direction when the sensor moves from the retracted position to the detection position. It is good to have.

  Specifically, as described in claim 3, the supporting means is a rotating member (121) to which a sensor is fixed and which is rotatable about a rotating shaft (121c) substantially parallel to the rotating shaft of the bat. ), And when the sensor moves from the retracted position to the detection position with the rotation of the rotating member in one direction, the detection stop member (101) that stops the rotation of the rotating member in one direction. It is good to have.

  According to the keyboard device configured as described above, the rotation member is fixed to the rotation member that can rotate about the rotation axis substantially parallel to the rotation axis of the bat as the rotation member rotates in one direction. When the sensor is moved from the retracted position to the detection position, the rotation of the rotation member in one direction is stopped by the detection stop member. Therefore, for example, when the sensor is moved from the retracted position to the detection position after the keyboard device pacing operation and the hammer assembly replacement operation are completed, the sensor is stopped at the detection position. By the way, when the sensor is not stopped at the detection position, adjustment work for positioning the sensor at the detection position occurs. On the other hand, according to the keyboard device configured as described above, since the sensor is stopped at the detection position, adjustment work for positioning the sensor at the detection position does not occur. Therefore, compared with the case where the sensor is not stopped at the detection position, for example, the time required for the pacing operation or the hammer assembly replacement operation can be shortened.

  Further, as described in claim 4, the support means further moves in the other direction of the rotating member when the sensor moves from the detection position to the retracted position as the rotating member rotates in the other direction. It is good to have a stop member at the time of retreat which stops rotation to.

  According to the keyboard device configured as described above, when the sensor moves from the detection position to the retracted position, for example, before starting the pacing operation or before starting the hammer assembly replacement operation, the sensor is stopped at the retracted position. By the way, when the sensor is not stopped at the retracted position, for example, an operation for stopping the sensor at the retracted position by an operator occurs. On the other hand, according to the keyboard device configured as described above, since the sensor is stopped at the retracted position, an operation for stopping the sensor at the retracted position does not occur. Therefore, according to the keyboard device configured as described above, it is possible to shorten the time required for the pacing operation, the hammer assembly replacement operation, and the like as compared with the case where the sensor is not stopped at the retracted position.

In the present embodiment, the keyboard apparatus according to the present invention is applied to a so-called upright piano, and the present embodiment will be described below with reference to the drawings.
[Description of configuration of upright piano 1]
FIG. 1 is a side sectional view of an essential part of an upright piano 1 as a keyboard device according to the present invention. In the following description, unless otherwise noted, the side closer to the player (right direction in FIG. 1) of the key 95 is “front”, and the side away from the player (left direction in FIG. 1) is “rear”. The upper side (upper direction in FIG. 1) is “upper”, the lower side (lower direction in FIG. 1) is “lower”, and the direction perpendicular to the paper surface of FIG.

  On the shelf board (not shown) of the upright piano 1 shown in FIG. 1, a keyboard 96 having a large number of keys 95 (only one white key 95a and one black key 95b are shown) arranged in the left-right direction, and a large number Action 2 of the same quantity as the quantity of the key 95 is placed. Each action 2 is provided so as to correspond to each key 95. This action 2 will be described later.

  Further, a center rail 91 extending in the left-right direction over the entire width of the keyboard 96 is fixed to the shelf board of the upright piano 1 shown in FIG. 1, and extends in the left-right direction over the entire length of the center rail 91. A hammer rail 23 is placed. Hereinafter, the center rail 91 and the hammer rail 23 will be described in this order.

  The center rail 91 is a long member extending in the left-right direction over the entire width of the keyboard 96. The center rail 91 is fixed to the shelf board by brackets 92 at several places 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 attached to the rear end portion of the damper flange 76 via a pin 77 so as to be rotatable. 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.

  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 bat frenzy 33 and the vipen frenzy 53 will be described later.

  The hammer rail 23 is a long member extending in the left-right direction over the entire length of the center rail 91. The hammer rail 23 has a plurality of hammer rail forks in which one end is rotatably supported by a support hole 92 a formed in the bracket 92 and the other end is fixed at several positions in the left-right direction of the hammer rail 23. By operating a pedal (not shown) via 25, it is configured to be able to rotate counterclockwise (in the direction of arrow A in FIG. 1) or clockwise.

  Next, as shown in FIG. 1, the action 2 includes a wiper 51, a jack 81, a bat 31, a catcher 41, a hammer 21, and a damper lever 71. Hereinafter, the explanation will be made in the order of the wiper 51, the jack 81, the bat 31, the catcher 41, the hammer 21, and the damper lever 71.

  The pen 51 is a plate-like member extending in the front-rear direction. Further, 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 of the wipen 51 in order from the front side. Further, one end of a jack spring 86 is located behind the back check 61 on the upper surface of the front end portion of the wipen 51. It is attached. The jack spring 86 will be described later.

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 pivotally attached to the jack flange 82 via a pin 83. The jack 81 will be described later. Further, 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 in the counterclockwise direction when the key is pressed, thereby causing the damper damping portion 75 to move to the string 11. It has the function to be separated from.

  The jack 81 is a substantially L-shaped member, and includes a long jack 84 that extends obliquely upward on the front side and a jack small 85 that is substantially orthogonal to the jack 84 and shorter than the jack 84. It is configured. The jack 81 is configured such that the upper end surface of the jack large 84 abuts against the bat skin 37 that covers the lower surface of the bat 31. As described above, one end of the jack spring 86 is attached to the wiper 51, but the other end of the jack spring 86 is attached to the jack small 85. Therefore, the jack 81 is urged by the jack spring 86 so as to always rotate counterclockwise.

  The bat 31 is attached to a butt flange 33 fixed to the upper portion of the center rail 91 via a pin 34 provided with the butt flange 33 so as to be rotatable in a clockwise direction or a counterclockwise direction. Further, a hammer shank 22 extending obliquely upward on the front side and a catcher shank 42 extending in a direction substantially perpendicular to the hammer shank 22 are fixed to the bat 31. 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 21 after stringing from coming into contact with the string 11 again. The bat 31 and the catcher 41 will be described in detail in the [Description of the configuration of the bat 31 and the catcher 41] column. A shutter 151 that rotates together with the bat 31 is fixed between the bat 31 and the catcher 41 between the bat 31 and the catcher 41. A shutter detector 130 having a sensor 135 and a sensor 136 for detecting the rotation of the shutter 151 is mounted on the center rail 91. The shutter 151 and the shutter detection unit will be described in detail in the [Description of the configuration of the shutter 151 and shutter detection unit 130] column.

  The hammer 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 in the counterclockwise direction, the hammer 21 strikes the string 11 and a stringing sound is generated.

  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. Thus, the length of the string-striking sound is determined by damping the string 11 as the damper damping unit 75 separated from the string 11 by the key depression is released from the key depression state. The damping unit 75 presses the string 11 to prevent the string 11 from resonating when another string is struck.

  As shown in FIG. 1, the hammer assembly 20 includes a hammer 21, a hammer shank 22, a bat 31, a catcher 41, a catcher shank 42, and the like. Further, the hammer assembly 20 has a function as a transmission portion that guides the hammer 21 to hit the string in conjunction with the pushing up of the jack 81.

  In the present embodiment, the shutter 151 corresponds to a “detected object”, the sensors 135 and 136 correspond to “sensors”, and the shutter detection unit 130 corresponds to “support means”.

[Description of Configuration of Bat 31 and Catcher 41]
Next, the configuration of the bat 31 and the catcher 41 will be described in detail. FIG. 4A is a perspective view showing the bat 31 and the catcher 41. In the following description, the side on which the hammer shank 22 is attached to the bat 31 (upward direction in FIG. 4A) is referred to as “upper”, and the opposite side (downward direction in FIG. 4A). ) Is “down”, the side where the catcher shank 42 is attached to the bat 31 (front direction in FIG. 4A) is “front”, and the opposite side (rear direction in FIG. 4A) is The “rear” and “left-right direction” will be described as the same direction as the “left-right direction” in FIG. Hereinafter, the bat 31 and the catcher 41 will be described in this order.

  As shown in FIG. 4A, the bat 31 is a columnar body having a substantially pentagonal cross-sectional shape, and a flat horizontal surface 31 a to which the hammer shank 22 is attached is formed on the upper portion thereof, and the catcher shank 42. A flat vertical surface 31b to which the bat 31 is attached is formed at the front portion thereof, and a flat inclined surface 31c continuous to the horizontal surface 31a and the vertical surface 31b is formed. A slope 31d that gently slopes downward from the rear to the rear is formed in the lower part. A bat skin 37 is attached to the slope 31d. As described above, the upper end surface of the large jack 84 comes into contact with the bat skin 37 attached to the inclined surface 31d. Further, the bat 31 has a flat plate portion 31e formed at the lower end of the rear portion thereof. The flat plate portion 31e extends downward continuously from a substantially central portion in the left-right direction at the lower end of the rear portion of the bat 31 and a substantially central portion in the left-right direction at the rear end of the inclined surface 31d, and has a substantially rectangular plate shape. There is no. The flat plate portion 31e is formed such that both plate-like surfaces are substantially perpendicular to the left-right direction. Furthermore, a through hole 31f having a center in the left-right direction is formed in a substantially central portion of the flat plate portion 31e. The through hole 31f is formed so that the butt 31 can rotate when the pin 34 provided in the butt flange 33 fixed to the upper portion of the center rail 91 is inserted into the through hole 31f. .

  The butt 31 has a through hole 31f provided in the bat 31 and a pin 34 provided in the butt flange 33 fixed to the upper portion of the center rail 91 is inserted into the butt flange 33 so that the butt flange 33 is rotated clockwise or counterclockwise. The pin 34 is supported so as to be pivotable in the clockwise direction. The bat 31 is pushed up by the large jack 84 supported by the wipen 51 when the wipen 51 is rotated counterclockwise by pressing the key, and is fixed to the bat 31 when it is rotated counterclockwise. The hammer 21 rotates counterclockwise and has a function of hitting the string 11.

  As shown in FIG. 4 (a), the catcher 41 is a substantially rectangular parallelepiped block body, and a flat vertical surface 41a fixed to the tip of the catcher shank 42 is formed at the rear portion thereof. A continuous flat horizontal surface 41b is formed on the top, a flat front surface 41c continuous with the horizontal surface 41b is formed on the front thereof, is continuous with the front surface 41c of the catcher 41, and gently descends from the front side to the rear side. An inclined surface 41d is formed in the lower part. A catcher skin 47 is attached to the inclined surface 41d. The catcher skin 47 is formed so that the catcher 41 smoothly contacts the back check 61 when the catcher 41 after striking is elastically received by the back check 61 while rotating clockwise. . Then, the catcher 41 is elastically received by the back check 61 while the catcher 41 is rotated clockwise when the hammer 21 after being struck returns, so that the rotation of the hammer 21 is restored. Has a function of absorbing impact.

[Description of Configuration of Shutter 151 and Shutter Detection Unit 130]
Next, the configuration of the shutter 151 and the shutter detection unit 130 for detecting the rotation of the shutter 151 will be described. FIG. 2A is a principal side sectional view showing a state where the sensor 135 and the sensor 136 are present at the detection position, and FIG. 2B is a principal portion showing a state where the sensor 135 and the sensor 136 are present at the retracted position. It is a sectional side view. FIG. 3A is a perspective view of a main part showing a state where the sensor 135 and the sensor 136 are present at the detection position, and FIG. 3B is a main part showing a state where the sensor 135 and the sensor 136 are present at the retracted position. FIG. Further, FIG. 4A is a perspective view showing the bat 31 and the catcher 41, and FIG. 4B is a perspective view showing the shutter 151 fixed to the bat 31 and the catcher 41. FIG. FIG. 4C is a perspective view showing the sensor 135 and the sensor 136, and FIG. 4D is a view taken in the direction of arrow C in FIG. 4A and 4B, the side where the hammer shank 22 is attached to the bat 31 (upward direction in FIG. 4A) is defined as “up”. The opposite side (downward direction in FIG. 4 (a)) is “lower”, and the side where the catcher shank 42 is attached to the bat 31 (frontward direction in FIG. 4 (a)) is “front”. (Backward direction in FIG. 4A) is “rear”, and “left-right direction” is described as the same direction as “left-right direction” in FIG. Hereinafter, the shutter 151 and the shutter detection unit 130 will be described in this order.

  The shutter 151 is made of a synthetic resin such as polyacetal or nylon, for example, and has a shutter main body 151a formed in a substantially triangular plate shape as shown in FIG. 4B. The shutter 151 is arranged such that the plate-like flat surface 151b of the shutter main body 151a is a surface substantially perpendicular to the left-right direction, and one of the three side surfaces of the shutter main body 151a is oriented obliquely upward on the front side. Yes. The shutter 151 has a substantially fan-shaped plate-like detected portion 151d extending obliquely upward on the front side from the rear end portion of the side surface 151c of the shutter main body 151a, and a rear end portion of the lower portion of the shutter main body 151a. It has a bat fixing portion 151e formed in a substantially semi-cylindrical shape, and a catcher fixing portion 151f formed in a substantially semi-cylindrical shape at the front end portion of the lower portion of the shutter main body 151a. The shutter main body 151a is formed so that its plate-like thickness continuously increases as the position of the shutter main body 151a changes in both directions from the detected portion 151d to the butt fixing portion 151e and the catcher fixing portion 151f.

  The butt fixing part 151e has a part of both end surfaces of the bat 31 whose inner cavity is continuous with a part of the inclined surface 31c of the bat 31, a part of the vertical surface 31b of the bat 31, and the inclined surface 31c and the vertical surface 31b. The outer shape (see FIG. 4A) is formed.

  The catcher fixing portion 151f has an outer shape of a part of the vertical surface 41a of the catcher 41, a part of the horizontal surface 41b of the catcher 41, and a part of both ends of the catcher 41 that is continuous with the vertical surface 41a and the horizontal surface 41b. (See FIG. 4A).

Next, a method for attaching the shutter 151 to the bat 31 and the catcher 41 will be described.
First, an adhesive such as a resin is applied to the lumen of the butt fixing portion 151e and the lumen of the catcher fixing portion 151f. In the shutter 151, as shown in FIG. 4B, the inner cavity of the butt fixing portion 151e has a part of the inclined surface 31c of the bat 31, a part of the vertical surface 31b of the bat 31, and a surface perpendicular to the inclined surface 31c. It is pressed so as to abut part of both end faces of the bat 31 continuous with 31b. The shutter 151 has both ends of the catcher 41 in which the lumen of the catcher fixing portion 151f is continuous with a part of the vertical surface 41a of the catcher 41, a part of the horizontal surface 41b of the catcher 41, and the vertical surface 41a and the horizontal surface 41b. It is disposed between the bat 31 and the catcher 41 by being pressed so as to be in contact with a part of the bat 31, and is fixed to the bat 31 and the catcher 41.

  The shutter 151 rotates together with the bat 31 in the clockwise direction or the counterclockwise direction. As shown in FIG. 4B, the shutter 151 has a distance from the center of the through hole 31f, which is the center of rotation, to the detected portion 151d, and from the center of the through hole 31f, the shutter body 151a, the butt fixing portion 151e, And it is comprised so that it may become larger than the distance to the catcher fixing | fixed part 151f.

  As shown in FIG. 2A, the shutter detection unit 130 rotates around the left side fixing member 101, the right side fixing member (not shown), and the left side fixing member 101 that are fixed to the front end of the center rail 91. It is fixed by a left rotating member 121 supported movably, a right rotating member (not shown) rotatably supported by a right fixing member, and a left rotating member 121 and a right rotating member. And a sensor 135 and a sensor 136 which are mounted on the sensor substrate 131 and detect the rotation of the shutter 151. Hereinafter, the left fixing member 101, the right fixing member, the left rotating member 121, the right rotating member, the sensor substrate 131, the sensor 135, and the sensor 136 will be described in this order.

  The left-side fixing member 101 is made of a highly rigid material such as a metal plate, for example, and as shown in FIGS. 3A and 3B, a substantially rectangular flat plate portion 101d extending in the vertical direction. The two fixing portions 101e and 101f having a substantially rectangular shape rising substantially vertically from the edge of one side of the flat plate portion 101d, and the rising of the fixing portion 101e from the edge of the other side substantially parallel to the edge of the one side. It has a substantially rectangular bearing fixing portion 101g and a stop portion 101a that rise substantially perpendicularly to the direction opposite to the direction. The bearing fixing portion 101g is formed with two female screw portions (not shown) in the left-right direction, the stop portion 101a is formed with a female screw portion 101b, and the fixing portion 101e and the fixing portion 101f are externally threaded. A through hole (not shown) for inserting the part is formed. Further, on the left side of the front end portion of the center rail 91, there is a female screw portion (not shown) communicating with the through holes provided in the fixing portion 101e and the fixing portion 101f of the left fixing member 101, respectively. When 101 is attached to the center rail 91, a male screw portion of a bolt (not shown) is formed to be screwed together. The left fixing member 101 is held in such a posture that the surfaces of the fixing portion 101e and the fixing portion 101f are vertical and face the left side of the front end portion of the center rail 91. It is attached to the left side of the front end portion of the center rail 91 by being inserted into the through holes formed in the fixing portion 101e and the fixing portion 101f and screwed into the female screw portion of the center rail 91. The left fixing member 101 is attached to the left side of the front end portion of the center rail 91 at a position where the left and right clearance dimension of the action 2 adjacent in the left and right direction is larger than the left and right width dimension of the left fixing member 101. ing.

  The bearing portion 106 is made of a highly rigid material such as a metal material or a resin molded product, for example, and as shown in FIGS. 3A and 3B, a cylindrical portion 106a having a center in the left-right direction; The cylindrical portion 106a has a substantially rectangular flat plate portion 106b that protrudes in the tangential direction from the outer surface and extends in the left-right direction over the entire length of the cylindrical portion 106a. The flat plate portion 106b has screw holes (not shown) communicating with the two female screw portions formed in the bearing fixing portion 101g of the left fixing member 101, and the bearing portion 106 is fixed to the bearing of the left fixing member 101. When attaching to the part 101g, it forms so that the external thread part of a volt | bolt (not shown) may be penetrated. And the bearing part 106 is hold | maintained with the attitude | position which the surface of the flat plate part 106b becomes perpendicular | vertical, and opposes the bearing fixing | fixed part 101g of the fixing member 101 on the left side, and it fixes the external thread part of two bolts 108 to flat plate part The bearing fixing portion 101g of the left fixing member 101 is inserted into the screw hole formed in 106b and screwed with the two female screw portions formed in the bearing fixing portion 101g of the left fixing member 101. Attached to.

  The right fixing member has a shape that is symmetrical to the left fixing member 101, and the configuration excluding the shape is the same as that of the left fixing member 101. Further, on the right side of the front end portion of the center rail 91, a female screw portion for attaching the right fixing member to the front end portion of the center rail 91 and a female screw portion for attaching the left fixing member 101 to the front end portion of the center rail 91 are provided. It is formed with the same configuration as the screw portion. The right fixing member is attached to the right side of the front end portion of the center rail 91 by a bolt (not shown) in the same manner as the left fixing member 101 described above. Further, the bearing portion 106 is attached to the right fixing member by a bolt (not shown) in the same manner as the left fixing member 101 described above.

  The left rotation member 121 is made of a highly rigid material such as a metal plate, for example, and extends in the vertical direction when the sensor 135 and the sensor 136 are present at the detection position, as shown in FIG. The lower flat plate portion 121e, the upper flat plate portion 121f extending obliquely upward from the lower flat plate portion 121e, and the substantially rectangular contact portion rising substantially vertically from the upper edge of one side of the lower flat plate portion 121e. 121a (see FIG. 3 (b)) and a substantially rectangular substrate fixing portion 121g (see FIG. 3 (a)) rising substantially vertically from the edge of the upper side of the upper flat plate portion 121f. A screw hole 121b (see FIG. 3B) communicating with the female screw portion 101b formed in the stop portion 101a of the left fixing member 101 is formed at the upper portion of the substantially center of the contact portion 121a. When the contact portion 121a of the moving member 121 is attached to the stop portion 101a of the left fixing member 101, the male screw portion of the bolt 109 is inserted. The board fixing portion 121g is formed with two female screw portions (not shown) substantially parallel to the upper edge of the upper flat plate portion 121f. Further, a pin 121c is erected in the vicinity of the lower end of the lower flat plate portion 121e of the left rotating member 121 in the direction opposite to the rising direction of the contact portion 121a. The pin 121c is formed such that its outer diameter dimension is smaller than the inner diameter dimension of the cylindrical portion 106a of the bearing portion 106, and its axial length dimension is smaller than the overall length dimension of the cylindrical portion 106a of the bearing portion 106. The left turning member 121 is held in a posture such that the lower flat plate portion 121e is vertical, and the tip of the pin 121c is inserted into the cylindrical portion 106a of the bearing portion 106 from right to left. In addition, the male screw portion of the bolt 109 is inserted into the screw hole 121b formed in the contact portion 121a, and is screwed into the female screw portion formed in the stop portion 101a of the left fixing member 101. Is attached to the fixing member 101 on the left side.

  The right rotating member has a shape that is symmetrical to the left fixing member 101, and the configuration excluding the shape is the same as that of the left rotating member 121. Then, the right rotation member is inserted into the cylindrical portion 106a of the bearing portion 106 from the left to the right in the pin portion of the pin 106, and a bolt (not shown) as in the left rotation member 121 described above. Is attached to the right fixing member.

  The sensor board 131 is a printed board made of a substantially rectangular flat plate made of, for example, an epoxy resin. The sensor substrate 131 is formed with a plurality of holes (not shown; hereinafter also referred to as through holes) through which terminals of electronic components (not shown) such as resistors, capacitors, transistors, and ICs can be inserted. The above-described electronic component is mounted on the mounting surface 131a by soldering. In addition, a plurality of sets of sensors 135 are arranged in the longitudinal direction on the mounting surface 131a of the sensor substrate 131 so that one sensor 135 and one sensor 136 are paired to detect the rotation of one shutter 151. And the sensor 136 are mounted side by side. Further, in the vicinity of both ends of the sensor substrate 131 in the longitudinal direction, two through holes (not shown) are respectively provided in the short direction, and the sensor substrate 131 is connected to the substrate fixing portion 121g of the left rotation member 121 and the right rotation. When the moving member is attached to the substrate fixing portion (not shown), the male screw portion of the bolt 133 is formed to be inserted.

  As shown in FIG. 4C, the sensor 135 is substantially U-shaped and includes a light emitting part 135a, a connecting part 135b, and a light receiving part 135c. The light emitting unit 135a is formed in a substantially square column shape, and houses a light emitting element 135e such as a light emitting diode that emits light such as infrared light from a side surface (hereinafter also referred to as a light emitting surface 135d) forming one surface thereof. The connecting portion 135b is formed in a substantially quadrangular prism shape, and extends along the direction of light emitted from the light emitting element 135e from the end portion of the light emitting portion 135a in a direction substantially perpendicular to the axis. The light receiving part 135c is formed in a substantially quadrangular prism shape, and extends substantially in parallel with the light emitting part 135a from the end of the connection part 135b. The light receiving portion 135c is formed to have a surface (hereinafter referred to as a light receiving surface 135f) facing the light emitting surface 135d of the light emitting portion 135a, and light (hereinafter referred to as light emitting element 135e) emitted from the light receiving surface 135f. For example, a light receiving element 135g such as a phototransistor that generates an electrical output value is received. In the sensor 135, as shown in FIG. 4D, the distance L between the light emitting surface 135d and the light receiving surface 135f (indicated by “L” in the drawing) is the plate thickness of the detected portion 151d of the shutter 151. It is formed larger than the dimension T (indicated by “T” in the drawing). Specifically, when the shutter 151 rotates, a distance L between the light emitting surface 135d and the light receiving surface 135f of the sensor 135 is assumed assuming a sufficient distance so that the detected portion 151d does not contact the sensor 135. Is set. The sensor 135 is connected to the light emitting element 135e of the light emitting part 135a and is connected to two terminals protruding from the outer surface of the connecting part 135b in the axial direction of the light emitting part 135a and the light receiving element 135g of the light receiving part 135c. And two terminals protruding from the outer surface of the connecting portion 135b in the axial direction of the light receiving portion 135c. The sensor 136 has the same configuration as the sensor 135.

Next, the positional relationship between the shutter 151 and a plurality of sets of sensors 135 and sensors 136 for detecting the rotation of the shutter 151 will be described.
First, as shown in FIG. 4 (d), when the sensor 135 detects the rotation of the shutter 151, the light emitting surface 135d and the light receiving surface 135f of the sensor 135 are substantially perpendicular to the left and right directions. The terminal of the sensor 135 can be inserted so that the sensor 135 is mounted at a position where the detected portion 151d of the shutter 151 that rotates as a surface rotates about the middle portion between the light emitting surface 135d and the light receiving surface 135f. Two through holes are formed. The sensor board 131 has a plurality of through-holes through which the terminals of the plurality of sets of sensors 135 and 136 can be inserted, as well as the four through-holes through which the terminals of the sensor 135 can be inserted. The plurality of sets of sensors 135 and 136 are mounted on the mounting surface 131a of the sensor substrate 131 by inserting terminals into the through holes of the sensor substrate 131 and soldering.

  Further, as shown in FIG. 4D, the left rotation member 121 and the right rotation member emit light from the detected portion 151d of the shutter 151 when the sensor 135 detects the rotation of the shutter 151. It is configured so that a substantially intermediate portion between the surface 135d and the light receiving surface 135f rotates, and the detected portion 151d can shield the optical axis of the sensor 135. Further, as shown in FIG. 2A, the left rotation member 121 and the right rotation member are covered when the shutter 151 rotates a predetermined angle when the sensor 135 detects the rotation of the shutter 151. The detection unit 151d is configured to shield the optical axis of the sensor 135.

  The plurality of sets of sensors 135 and 136 are electrically connected to the sensor board 131 by inserting terminals into the through-holes of the sensor board 131 and soldering. It is electrically connected to an information processing unit (not shown). The sensor substrate 131 has a mounting surface 131a that faces downward and is horizontal, and faces the substrate fixing portion 121g of the left rotation member 121 and the substrate fixing portion (not shown) of the right rotation member. The female screw portion formed in the board fixing portion 121g of the left rotation member 121, and the male screw portion of the bolt 133 inserted through the through holes formed in the vicinity of both ends in the longitudinal direction, By screwing with a female screw portion formed in a female screw portion formed in the substrate fixing portion of the right rotation member, the right rotation member 121 and the right rotation member are attached.

  When the shutter detection unit 130 detects the rotation operation of the hammer 21 as performance information, the shutter detection unit 130 detects a shutter 151 that rotates with the rotation of the bat 31 (see FIG. 2A). )) Has a function of supporting the sensor 135 and the sensor 136. In addition, when the pacing operation of the upright piano 1 or the replacement operation of the hammer assembly 20 is performed, the shutter detection unit 130 uses, for example, the tip of a rod-like object such as a tool for pacing operation to upright piano 1. In the region where there is no interference when moving the hammer assembly 20 from the front of the upright piano 1 to the damper wire 73 substantially horizontally and when the hammer assembly 20 is removed from the upright piano 1 substantially upward or from the upper right piano 1 from substantially above. The sensor 135 and the sensor 136 are moved to the retracted position, which is the position set in (1). Specifically, as shown in FIG. 2B, the retracted position is below a substantially horizontal plane including the upper end of the damper lever 71 (in the direction of arrow D in FIG. 2B), and the front end of the catcher 41 Is a position set in a region ahead (in the direction of arrow E in FIG. 2B) from a substantially vertical plane that is substantially parallel to the left-right direction.

In the present embodiment, the pin 34 corresponds to a “rotating shaft”, and the fixing member 101 corresponds to a “stop member at detection”.
[Action 2 action]
Next, the action 2 will be described with reference to FIG. The key 95 will be described by taking up one white key 95a corresponding to action 2.

  When the white key 95a is depressed downward (hereinafter also referred to as key depression), the rear end portion (rear end portion in FIG. 1) of the white key 95a rises, and the capstan 55 fixed to the rear end portion of the white key 95a. Pushes up the wiper 51 and rotates it counterclockwise. 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 rotating by pressing the key, the hammer 21 fixed to the bat 31 rotates counterclockwise and strikes the string 11. Further, the catcher 41 fixed to the bat 31 also starts rotating. Then, the shutter 151 fixed to the bat 31 and the catcher 41 also starts to rotate.

  After the hammer 21 strikes the string 11, the hammer 21 is rotated and returned, and the catcher 41 is elastically received by the back check 61. The catcher 41 is held by the back check 61 while the key is being pressed.

  When the white key 95a is released from the depressed state, the catch of the catcher 41 by the back check 61 is loosened, and a gap is generated between the back check 61 and the catcher 41 as shown in FIG. Then, during the return key, the jack jack 84 returns to a position where the bat 31 can be pushed up to prepare for the next key press.

  In the stationary state where the key is not depressed, the sensor 135 receives the light emitted from the light emitting element 135e of the light emitting unit 135a by the light receiving element 135g of the light receiving unit 135c and generates an electrical output value (hereinafter referred to as “off state”). "). When the key is depressed as described above, the shutter 151 starts to rotate counterclockwise, rotates by a predetermined angle, and when the detected portion 151d shields the optical axis of the sensor 135, the sensor 135 receives the light receiving portion 135c. The light receiving element 135g does not receive light and does not generate an electrical output value (hereinafter referred to as “on state”). The sensor 136 has the same function as the sensor 135. The performance information processing unit connected to the sensor 135 and the sensor 136 detects such “on state” and “off state” of the sensor 135 and the sensor 136. The performance information processing unit measures the time from the time when the sensor 135 is turned “on” to the time when the sensor 136 is turned “on” when the key is depressed. The rotation speed of the hammer is detected based on the angular difference between the rotation angle of the shutter 151 where the sensor 135 is in the “on state” and the rotation angle of the shutter 151 where the sensor 136 is in the “on state”. Then, the performance information processing unit obtains the velocity (volume) of pronunciation according to the rotation speed of the hammer detected as the performance information.

[Operation of shutter detection unit 130]
Next, the operation of the shutter detection unit 130 of this embodiment will be described with reference to FIGS.

  As shown in FIG. 2A, when the sensor 135 and the sensor 136 are present at the detection position, as shown in FIG. The fixing member 101 is attached to the left fixing member 101 by being inserted into the screw hole 121b formed in the contact portion 121a and screwed with the female screw portion formed in the stopping portion 101a of the left fixing member 101. It has been. Further, the right rotating member is attached to the right fixing member by a bolt (not shown) in the same manner as the left rotating member 121 described above.

Hereinafter, an operation for moving the sensor 135 and the sensor 136 from the detection position (see FIG. 2A) to the retracted position (see FIG. 2B) will be described.
First, as shown in FIG. 3A, the left turning member 121 is held in such a posture that the lower flat plate portion 121e is vertical, and the left turning member 121 is attached to the left fixing member 101. The screw 109 is loosened and the bolt 109 is removed. Similarly to the left rotation member 121 described above, the right rotation member is held, and a screw (not shown) that attaches the right rotation member to the right fixing member is loosened. Is removed.

  Then, the hammer rail 23 is rotated counterclockwise (in the direction of arrow A in FIGS. 2A and 2B) via the hammer rail fork 25 (see FIG. 1), and the left rotation member. The posture in which the sensor substrate 131 does not come into contact with the hammer rail 23 when the 121 and the right rotation member are rotated in the clockwise direction (the arrow B direction in FIGS. 2A and 2B). Held in. In the held state, the left rotating member 121 and the right rotating member are rotated in the clockwise direction (the direction of arrow B in FIGS. 3A and 3B), whereby the sensor substrate. A plurality of sets of sensors 135 and sensors 136 mounted on the mounting surface 131a of 131 are moved to the retracted position (see FIG. 2B). After the plurality of sets of sensors 135 and 136 are moved to the retracted position, the hammer rail 23 is returned to the original position.

  When the plural sets of sensors 135 and 136 are in the retracted position, as shown in FIG. 2B, the sensors 135 and 136 are below the upper end of the damper lever 71 (arrow D in FIG. 2B). 2) and at a position ahead (in the direction of arrow E in FIG. 2B) from the front end of the catcher 41 constituting the hammer assembly 20.

Hereinafter, an operation for moving the sensor 135 and the sensor 136 from the retracted position (see FIG. 2B) to the detection position (see FIG. 2A) will be described.
First, the hammer rail 23 is rotated counterclockwise (in the direction of arrow A in FIGS. 2 (a) and 2 (b)) via a hammer rail fork 25 (see FIG. 1), and the left rotation member. The sensor board 131 does not come into contact with the hammer rail 23 when the 121 and the right turning member are turned in the counterclockwise direction (the direction opposite to the arrow B in FIGS. 2A and 2B). Held in such a posture. In the held state, the left rotation member 121 and the right rotation member are rotated in the counterclockwise direction (the direction opposite to the arrow B direction in FIGS. 2A and 2B). Accordingly, the plurality of sets of sensors 135 and 136 mounted on the mounting surface 131a of the sensor substrate 131 are moved to the detection position (see FIG. 2A). After the plurality of sets of sensors 135 and 136 are moved to the detection position, the hammer rail 23 is returned to the original position.

  The left rotation member 121 is held in such a posture that the lower flat plate portion 121e is vertical, and the male screw portion of the bolt 109 is inserted into the screw hole 121b formed in the contact portion 121a. Then, it is attached to the left fixing member 101 by being screwed with a female screw portion formed in the stop portion 101 a of the left fixing member 101. Further, the right rotating member is attached to the right fixing member by a bolt (not shown) in the same manner as the left rotating member 121 described above.

[Description of effects]
According to the upright piano 1 of the present embodiment, the following operational effects can be obtained. That is, in a keyboard device that includes a hammer assembly that strikes with a hammer interlocked with a conventional key and a sensor that can detect the rotation of the hammer as performance information, for example, pacing work or hammer assembly replacement work is performed. In this case, the sensor disposed near the hammer assembly may be once removed from the hammer assembly. Therefore, compared with the pacing operation of the keyboard device without the sensor, the keyboard device with the sensor is more The time required for the pacing work was long.

  On the other hand, according to the upright piano 1 of the present embodiment, the shutter 151 is disposed between the bat 31 and the catcher 41 and is fixed to the bat 31 and the catcher 41. The rotation member 121 constituting the shutter detection unit 130 for detecting the rotation is a cylindrical portion of the bearing portion 106 in which a pin 121c provided at the lower end thereof is fixed to the fixing member 101 attached to the center rail 91. By being inserted into 106a, it is supported so as to be rotatable about the pin 121c with respect to the fixing member 101. In addition, a sensor substrate 131 on which a plurality of sets of sensors 135 and 136 are mounted is attached to the upper end of the rotating member 121. When the rotating member 121 is rotated, the sensor board 131 is moved away from the detection position. A plurality of sets of sensors 135 and 136 are moved to each other.

  Therefore, when the pacing operation of the upright piano 1 or the replacement operation of the hammer assembly 20 is performed, the plurality of sets of sensors 135 and 136 are moved to the retracted position. As described above, the retracted position refers to a hammer that does not interfere when the tip of a rod-shaped object such as a pacing tool is moved substantially horizontally from the front of the upright piano 1 toward the damper wire 73. This position is set in a region where interference does not occur when the assembly 20 is taken out from the upright piano 1 substantially upward or taken out from the upright piano 1 from substantially above. In the present embodiment, this retracted position is set in a region below a substantially horizontal plane including the upper end of the damper lever 71 and ahead of a substantially vertical plane substantially parallel to the left-right direction including the front end of the catcher 41. It is the position that was done.

  Therefore, according to the upright piano 1 of the present embodiment, for example, when a pacing operation or a replacement operation of the hammer assembly 20 is performed, the plurality of sets of sensors 135 and 136 are moved to the retracted position. Since a plurality of sets of sensors 135 and 136 are not removed from the hammer assembly 20, it is required for pacing work, replacement work of the hammer assembly 20, etc., as compared with a keyboard device in which the sensors may be removed from the hammer assembly 20. Time can be shortened.

  Further, according to the upright piano 1 of the present embodiment, when the plurality of sets of sensors 135 and 136 move from the retracted position to the detection position, the contact portion of the rotating member 121 contacts the stop portion 101a of the fixed member 101. The rotation of the rotating member 121 is stopped by the contact of 121a. Therefore, when the plurality of sets of sensors 135 and 136 are moved to the detection positions after the pacing operation and the replacement of the hammer assembly, the plurality of sets of sensors 135 and 136 are positioned at the detection positions. No adjustment work occurs. Therefore, the time required for the pacing operation, the replacement operation of the hammer assembly, and the like can be shortened as compared with the case where the plural sets of sensors 135 and 136 are not stopped at the detection position.

[Other Embodiments]
As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, It is possible to implement in the following various aspects.

  (A) The keyboard device of the above embodiment may have a configuration in which when the plurality of sets of sensors 135 and sensors 136 are moved to the retracted position, the sensors 135 and sensor 136 are stopped at the retracted position.

  The difference between the configuration of the above embodiment and the present embodiment is the left rotating member and the fixing member, and the right rotating member and the fixing member. Detailed description of the same configuration as the embodiment is omitted. In addition, configurations that are considered functionally equivalent to the above embodiment will be described with the same reference numerals as those used in the above embodiments.

  5A is a side cross-sectional view of the main part showing a state in which the sensor 135 and the sensor 136 in the present embodiment are present at the detection position, and FIG. 5B is a diagram illustrating the sensor 135 and the sensor 136 in the present embodiment. It is principal part sectional drawing which shows the state which exists in a retracted position.

  The difference in configuration between the left rotating member 121 of the above embodiment and the left rotating member 123 of the present embodiment is that the left rotating member 123 of the present embodiment has an open contact portion 123d at the lower end thereof. It is a point. Specifically, the open contact portion 123d is substantially parallel to a substantially rectangular contact portion 123a (see FIG. 5B) that rises substantially vertically from above the edge of one side of the lower flat plate portion 123e. The lower flat plate portion 123e has a substantially rectangular shape that rises substantially vertically from below the edge of the other side in the same direction as the rising direction of the contact portion 123a. The right rotation member has a symmetrical shape with the left rotation member 123, and the configuration excluding the shape is the same as the left rotation member 123.

  Further, the difference between the configuration of the left fixing member 101 of the above embodiment and the left fixing member 103 of the present embodiment is that the left fixing member 103 of the present embodiment has an open stop 103c at the lower end thereof. It is a point. Specifically, the opening stop portion 103c has a substantially rectangular shape extending downward from the flat plate portion 101d. The right-side fixing member has a symmetrical shape with the left-side fixing member 103, and the configuration excluding the shape has the same configuration as the left-side fixing member 103.

  According to the present embodiment configured as described above, a plurality of sets of sensors 135 and 136 move from the detection position (see FIG. 5A) to the retracted position (see FIG. 5A) (FIG. 5A). ) And the arrow F direction in FIG. 5B), the rotation of the rotation member 123 is stopped by the contact of the release contact portion 123d of the rotation member 123 with the release stop portion 103c of the fixed member 103. The Therefore, when the plurality of sets of sensors 135 and 136 move from the detection position to the retracted position, for example, before the start of the pacing operation or before the replacement operation of the hammer assembly 20, the multiple sets of sensors 135 and 136 are moved to the retracted position. Therefore, there is no need for the operator to stop the plural sets of sensors 135 and 136 at the retracted position. Therefore, the time required for the pacing work and the replacement work of the hammer assembly 20 can be further reduced as compared with the case where the plural sets of sensors 135 and 136 are not stopped at the retracted position. The difference in configuration between the above embodiment and the present embodiment is the left rotating member 123 and the fixed member 103 and the right rotating member and the fixed member, but the left rotating member 123 and the fixed member are fixed. The member 103 or any one of the right rotation member and the fixed member may be used.

In the present embodiment, the fixing member 103 corresponds to a “retracting stop member”.
(B) The keyboard device according to the embodiment may have a configuration in which the sensor 135 and the sensor 136 can appropriately set the rotation of the shutter 151 as the detection position.

  The difference between the configuration of the above embodiment and the present embodiment is the left rotation member and bolt, and the right rotation member and bolt. Therefore, only this difference will be described in detail, and Detailed description of the same configuration is omitted. In addition, configurations that are considered functionally equivalent to the above embodiment will be described with the same reference numerals as those used in the above embodiments. 6A is a side sectional view of the main part showing a state in which the sensor 135 and the sensor 136 in the present embodiment are present at the detection position, and FIG. It is.

  The difference between the configuration of the left rotating member 121 of the above embodiment and the left rotating member 124 of the present embodiment is that the left rotating member 124 of the present embodiment has a female threaded portion 124e on its contact portion 124a. Is formed. Specifically, the female screw portion 124e is formed below a screw hole 124b formed in the upper portion of the approximate center of the contact portion 124a. An adjustment bolt 110 is screwed into the female thread portion 124e of the contact portion 124a of the left rotation member 124 from the front, and the tip thereof is in contact with the stop portion 101a of the left fixing member 101. . The right-side fixing member has a symmetrical shape with the left-side fixing member 103, and the configuration excluding the shape has the same configuration as the left-side fixing member 103. An adjustment bolt is screwed into the female screw portion (not shown) of the contact portion of the right rotation member from the front, and the tip thereof is in contact with the stop portion of the right fixing member.

  According to the present embodiment configured as described above, the bolt 110 that is screwed into the female screw portion 124e of the contact portion 124a of the left rotation member 124 is rotated in the left-right direction, so that the tip of the bolt 110 is rotated. The dimension of the left rotating member 124 protruding from the contact portion 124a toward the stop portion 101a of the left fixing member 101 is adjusted. Therefore, since the distance between the contact portion 124a of the left rotation member 124 and the stop portion 101a of the left fixing member 101 is adjusted by rotating the bolt 110 in the left-right direction, the sensor 135 and the sensor 136 are adjusted. Can be appropriately set as a position for detecting the rotation of the shutter 151. The reason will be described next. For example, due to variations in processing accuracy of the left rotating member 121 and the fixing member 101, the sensor 135 and the sensor 136 are located in front of the position where the contact portion 121 a of the left rotating member 121 contacts the stop portion 101 a of the fixing member 101. May be appropriate as a position for detecting the rotation of the shutter 151. In such a case, when the bolt 110 is rotated in the left-right direction, the tip of the bolt 110 is appropriately projected from the contact portion 124a toward the stop portion 101a, so that the sensor 135 and the sensor 136 are shuttered. The position for detecting the rotation of 151 can be set appropriately. Therefore, according to the present embodiment configured as described above, the position for the sensor 135 and the sensor 136 to detect the rotation of the shutter 151 can be appropriately set. The difference between the above embodiment and this embodiment is the left rotation member and bolt, and the right rotation member and bolt, but the left rotation member and bolt, or right rotation. Any one of a member and a bolt may be sufficient.

  (C) In the keyboard device of the above embodiment, the sensor 135, the sensor 136, and the sensor substrate 131 are provided with a protective member such as a cover for preventing the sensor board 131 from being damaged due to the fall or contact of foreign matter from the outside. May be. Also in the embodiment configured as described above, the same operational effects as those of the above-described embodiment are obtained.

  (D) In the above-described embodiment, the shutter detection unit 130 includes the left fixing member 101, the left fixing member, the left rotating member 121, the right rotating member, the sensor substrate 131, the sensor 135, and the sensor 136. However, it is not limited to this. The fixing member and the rotating member are not limited to one set on the left and right, but may be a plurality of sets. Further, the shape of the right and left fixing members and the shape of the left and right rotating members are not limited to left-right symmetry, and may be asymmetric. Further, the sensor substrate 131 is not limited to one, and may be a plurality of sensor substrates such as a low-frequency sensor substrate and a middle / high-frequency sensor substrate. Further, one sensor 135 and one sensor 136 are not necessarily a set for detecting the rotation of one shutter 151. One sensor may be used to detect the rotation of one shutter 151, or a combination of three or more sensors may be used. Also in the embodiment configured as described above, the same operational effects as those of the above-described embodiment are obtained.

1 is a side view of a main part of an upright piano 1. FIG. (A) is a principal part side view which shows the state in which the sensor 135 and the sensor 136 exist in a detection position, (b) is a principal part side view which shows the state in which the sensor 135 and the sensor 136 exist in a retracted position. (A) is a principal part perspective view which shows the state in which the sensor 135 and the sensor 136 exist in a detection position, (b) is a principal part perspective view in which the sensor 135 and the sensor 136 exist in a retracted position. (A) is a perspective view which shows the bat 31 and the catcher 41, (b) is a perspective view which shows the shutter 151 fixed to the bat 31 and the catcher 41, (c) is the sensor 135 and the sensor 136. (D) is a C arrow view in FIG. 2 (a). (A) is a principal part perspective view which shows the state in which the sensor 135 and sensor 136 in other embodiment (I) exist in a detection position, (b) is the sensor 135 and sensor 136 in other embodiment (I). It is a principal part perspective view which shows the state which exists in a retracted position. (A) is a principal part perspective view which shows the state in which the sensor 135 and sensor 136 in other embodiment (b) exist in a detection position, (b) is a G arrow line view in (a).

Explanation of symbols

  1 ... upright piano, 2 ... action, 11 ... string, 20 ... hammer assembly, 21 ... hammer, 22 ... hammer shank, 23 ... hammer rail, 24 ... hammer rail cross, 25 ... hammer rail fork, 31 ... bat, 31a ... Horizontal plane, 31b ... Vertical plane, 31c ... Inclined plane, 31d ... Slope, 31e ... Plate portion, 31f ... Through hole, 31g ... Cavity, 32 ... But spring, 33 ... But frenzy, 34 ... Pin, 37 ... Bat skin, 41 ... Catcher, 41a ... Vertical surface, 41b ... Horizontal plane, 41c ... Front surface, 41d ... Slope, 42 ... Catcher shank, 47 ... Catcher skin, 51 ... Wipen heel, 52 ... Wipen heel, 53 ... Wipen frenzy, 54 ... Pin, 55 ... Capstan, 61 ... Back check, 69 ... Bridle wire, 71 ... Damper -72 ... Damper lever spring, 73 ... Damper wire, 74 ... Damper head, 75 ... Damping section, 76 ... Damper flange, 77 ... Pin, 78 ... Damper spoon, 81 ... Jack, 82 ... Jack flange, 83 ... Pin, 84 ... large jack, 85 ... small jack, 86 ... jack spring, 91 ... center rail, 92 ... bracket, 92a ... support hole, 95 ... key, 95a ... white key, 95b ... black key, 96 ... keyboard, 101,103 ... fixed member, 101a, 103a ... stop part, 101b, 103b ... female screw part, 101d ... flat plate part, 101e, 101f ... fixed part, 101g ... bearing fixed part, 103c ... opening stop part, 106 ... bearing part, 106a ... Cylindrical part, 106b ... flat plate part, 108, 109, 110 ... bolt, 121, 123, 124 ... rotating member, 121a, 23a, 124a ... contact part, 121b, 123b, 124b ... screw hole, 121c, 123c, 124c ... pin, 121e, 123e ... lower flat plate part, 121f ... upper flat plate part, 121g ... substrate fixing part, 123d ... open contact Part, 124e ... female thread part, 130 ... shutter detection part, 131 ... sensor board, 131a ... mounting surface, 133 ... bolt, 135, 136 ... sensor, 135a, 136a ... light emitting part, 135b, 136b ... connection part, 135c, 136c: Light receiving part, 135d, 136d ... Light emitting surface, 135e, 136e ... Light emitting element, 135f, 136f ... Light receiving surface, 135g, 136g ... Light receiving element, 151 ... Shutter, 151a ... Shutter body, 151b ... Flat surface, 151c ... Side surface, 151d: detected portion, 151e: butt fixing portion, 151f: catcher fixing portion.

Claims (4)

A bat that can be rotated around a rotation axis that is substantially parallel to the swing axis when the key swings, a lower end of the bat is connected to the upper portion of the bat, and the bat rotates with the rotation of the bat. A hammer assembly having a hammer capable of striking a string, and a catcher fixed to the front part of the bat via a catcher shank, and a damping part which is located behind the bat and dampens the string via a damper wire In a keyboard device comprising a long damper lever supported from below,
A detected object disposed between the bat and the catcher, fixed to at least one of the bat or the catcher, and rotated with the rotation of the bat;
A sensor capable of outputting a signal indicating that when the detected object approaches,
A support means capable of supporting the sensor at a detection position that is a position that can be approached with a detection object that rotates as the bat rotates.
With
The support means does not interfere with the sensor when the tip of the rod-like object is moved substantially horizontally from the front of the keyboard device toward the damper wire, and when the hammer assembly is removed from the keyboard device substantially upward. Alternatively, the sensor is configured to be movable between a retracted position and a detection position, which are positions set in a region that does not interfere with the sensor when attached to the keyboard device from substantially above. Keyboard device. The keyboard device according to claim 1,
The retracted position is a position set in a region below a substantially horizontal plane including the upper end of the damper lever and ahead of a substantially vertical plane substantially parallel to the horizontal direction including the front end of the catcher. Keyboard device to play. The keyboard device according to claim 1 or 2,
The support means is
A rotation member to which the sensor is fixed and rotatable about a rotation axis substantially parallel to the rotation axis of the bat;
A detection stop member that stops the rotation of the rotating member in one direction when the sensor moves from the retracted position to the detection position along with the rotation of the rotating member in one direction; A keyboard device characterized by comprising: The keyboard device according to claim 3,
The support means further rotates the rotation member in the other direction when the sensor moves from the detection position to the retracted position as the rotation member rotates in the other direction. A keyboard apparatus having a retreat stop member for stopping.

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