JP3451711B2 - Keyboard instrument - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention performs a mute performance in which a string is not hit even if a key is pressed by bringing a catcher of a hammer action portion into contact with a stopper to prevent the hammer action portion from further rotating. The present invention relates to a keyboard instrument such as an upright piano that is configured so that it can prevent the occurrence of biting between a catcher and a stopper.

[0002]

2. Description of the Related Art Generally, in an upright piano, a hammer action portion has a hammer attached to a tip portion of a hammer shank and a catcher attached to a tip portion of a catcher shank substantially orthogonal to the hammer shank. When the hammer hits the string and bounces back, the catcher comes into contact with a cushion material called a back check, so that the hammer action part is elastically received, and the hammer action part returns after the key is released. Is done smoothly. In recent years, a stopper is placed on the rotation trajectory of the catcher so that it can be retracted and retracted to prevent further rotation of the hammer action part, and as a result, no sound is played even if a key is pressed. Instead of producing a musical instrument, a mute playing piano constructed so that a musical tone can be generated by electronic means is rapidly becoming popular.

[0003]

By the way, in the above-described sound-deadening piano, a cushion member made of felt or the like is fixed to the surface of the stopper that contacts the catcher. For this reason, if the stopper is moved while the key is being pressed, the corner of the catcher may bite on the side surface of the cushion material and the hammer action part may not move. Furthermore, when a key is pressed while the stopper is being moved, the same situation as described above occurs.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a keyboard musical instrument capable of preventing the catcher and the stopper from biting.

[0005]

A keyboard instrument according to a first aspect of the present invention has a key, a hammer mechanism that pivots to strike a corresponding string when the key is depressed, and the hammer mechanism has a predetermined size or more. And a sound deadening means capable of selecting a state in which the hammer of the hammer mechanism does not strike the string by preventing the hammer mechanism from rotating, and the hammer mechanism is provided when the hammer mechanism returns to rotate after striking the string. The sound deadening means is provided with a catcher member that comes into contact with the cushioning member, and the sound deadening means includes a stopper that comes into contact with an end surface of the catcher member that faces the rotation direction, and the stopper is provided between the initial position and the contact position between the catcher member. A keyboard instrument provided with a moving mechanism for moving is provided with a restraining means for blocking the movement of the stopper when a key is pressed.

A keyboard musical instrument according to a second aspect is the keyboard musical instrument according to the first aspect, wherein position detecting means for detecting the position of the stopper and the stopper is set to the initial position based on the detection result of the position detecting means. And warning means for issuing a predetermined warning when the vehicle is located at a position other than the contact position.

A keyboard instrument according to a third aspect of the present invention includes a key, a hammer mechanism that pivots to strike a corresponding string when the key is pressed, and prevents the hammer mechanism from pivoting more than a predetermined amount. The hammer of the hammer mechanism can select a state in which the hammer does not hit the string, and the hammer mechanism is a catcher that comes into contact with the cushioning member when the hammer mechanism returns after turning the string. The sound deadening means is provided with a member, the stopper is in contact with an end face of the catcher member facing in the rotation direction, a moving mechanism for moving the stopper to a contact position with the catcher member, and the moving mechanism is provided with the stopper. In a keyboard instrument having a control means for supplying a drive signal for moving the key, the control means supplies the drive signal when a key depression operation is performed. It is characterized in that stop.

According to a fourth aspect of the present invention, in the keyboard instrument according to the third aspect, the control means sets the position of the stopper to a predetermined position when a key operation is performed while the stopper is being moved. If it reaches, the stopper is moved at a speed higher than the speed, and if the stopper does not reach the predetermined position, the stopper is moved to the movement start position at a high speed.

[0009]

In the keyboard instrument according to the first aspect of the invention, when the key is depressed, the restraining means prevents the stopper from moving. In addition, in the keyboard instrument according to the third aspect, when a key is depressed, the supply of the drive signal to the moving mechanism is stopped. Therefore, it is possible to prevent the stopper from catching on the catcher.

[0010]

【Example】A. First embodiment (1) Configuration of Example Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
While explaining. Figure 1 shows one of the upright pianos
Hammer door that transmits the movement of the key to the hammer and strikes the string
It is a sectional side view which shows the structure of the action part. Han shown in the figure
The mar-action unit operates on the key 10 and the operation of the key 10.
Driven string driving mechanism 20 and operation of the string striking mechanism 20
Hammer assembly driven by
(Hammer mechanism) 40 and damper mechanism 50 that pushes the string S
It is composed of and. The key 10 is the upper surface of the shelf board 11.
A support member that is placed on the keyboard and extends over the entire length of the keyboard
It is rotatably supported by (not shown). And press
By keying, the rear end of the key 10 (the right end in FIG. 1)
Part) rises, and the capstan 12 attached there is
It came to push up the string striking mechanism 20 described below.I
It

In the figure, reference numeral 16 is a center rail which is a framework of the hammer action portion. At the lower end of the center rail 16, one wippen flange 22 is attached for each key 10. At the lower end of the whip pen flange 22, one end of a whip pen 23 whose longitudinal direction is oriented in the front-rear direction of the upright piano is rotatably supported by a pin 22a. The whip pen 23 has a plate shape, and a whip pen heel 24 is attached to the lower surface of the other end. The lower surface of the whip pen heel 24 is supported by the capstan 12 so that the whip pen 2
3 is kept in a substantially horizontal initial position.

A jack flange 25 projecting upward is attached to the whip pen 23, and an upper end portion of the jack flange 25 has a substantially L-shaped jack 2.
6 is rotatably supported near the bent portion. The jack 26 includes a large jack 26a extending obliquely upward and a small jack 26b substantially orthogonal to the large jack 26a. The jack 26 is urged in the clockwise rotation direction in the drawing by the jack small 26b being pushed up by the jack spring 27 attached to the whip pen 23.

On the other hand, the center rail 16 is provided with a regulating rail 32 extending over the entire length of the keyboard 10 via a bracket 31. A regulating button 34 whose vertical position is adjustable by a screw 33 is attached to the regulating rail 32.

Next, reference numeral 41 in the figure denotes a butt forming the base of the hammer assembly 40. The bat 41 is
The butt flange 42 attached to the center rail 16 is rotatably attached via a center pin 42a. A hammer shank 43 that extends obliquely upward is attached to the butt 41, and the hammer shank 4
A hammer 44 is attached to the upper end of 3. A catcher shank 45, which is substantially orthogonal to the hammer shank 43, is attached to the butt 41, and a catcher 46 is attached to the tip of the catcher shank 45. Further, a butt spring 47 for urging the bat 41 in the counterclockwise rotation direction is attached to the upper right end portion of the bat 41. Furthermore, on the lower surface of the bat 41,
A butt under felt 41a and a butt under cloth 41b covering the butt under felt 41a are attached, and the upper end surface of the large jack 26a is in contact with the butt under cloth 41b.

Next, reference numeral 36 in the drawing is a hammer rail. The hammer rail 36 extends over the entire length of the keyboard, and a hammer pad 37 is attached to the side surface thereof. The hammer assembly 40 is held at the initial position where the hammer shank 43 is brought into contact with the hammer pad 37 by the urging force of the butt spring 47. Further, a back check 38 that elastically receives the catcher 46 of the hammer assembly 40 that pivotally returns to the initial position is attached to the free end of the whip pen 23. Further, a bridle wire 39a is attached next to the back check 38, and the upper end of the bridle wire 39a and the catcher 46 are connected by a bridle tape 39b. Bridle tape 3
9b is for preventing the double strike of the string S due to the rebound of the hammer assembly 40 by causing the return of rotation of the hammer assembly 40 to follow the return of rotation of the whip pen 23.

Next, a damper flange 51 is attached to the center rail 16, and a damper lever 52 whose longitudinal direction is oriented vertically is rotatably supported by the damper flange 51, and the damper lever 52 is attached to the upper end portion of the damper lever 52. Is
A damper 54 is attached via a damper wire 53. The damper lever 52 is urged in the clockwise rotation direction by a damper lever spring 55 attached to the damper flange 51, so that when the damper 54 normally presses the string S and strikes another string S. To prevent resonance. On the other hand, by pressing the key
When 3 rotates in the clockwise direction, the damper spoon 56 attached to the whip pen rotates the damper lever 52 in the counterclockwise direction against the biasing force of the damper lever spring 55 , and separates the damper 54 from the string S. After that, the hammer 44 strikes the string S and a string-striking sound is generated.

Next, the upright piano of this embodiment has a silencing mechanism (silencing means) 60 having the following structure. That is, reference numeral 15 in FIG. 2 denotes action brackets arranged on both sides of the upright piano. A mounting bracket 61 is mounted on the side surface of each action bracket 15, and a bearing 62 is mounted on the mounting bracket 61. In the figure, reference numeral 62a is an inner lining of the bearing 62, and the inner lining 62a is made of felt, for example. A shaft 63 is rotatably supported by the bearing 62. A lever 64 that is rotated by a drive mechanism (moving mechanism) 70 described later is attached to the end of the shaft 63. Further, the spacer 6 is provided on the outer peripheral surface of the shaft 63.
A stopper 66 is fixed via 5. Stopper
The -66 includes, for example, a cushion material 66a made of felt or the like and a pad 66b made of synthetic leather or the like.

Next, FIG. 4A is a side view showing an outline of a drive mechanism 70 for driving the muffling mechanism 60. As shown in the figure, a plate 71 is attached to the action bracket 15 so as to be located below the lever 64. Board 7
A lower end portion of the tension spring 72 is attached to the No. 1 and an upper end portion of the tension spring 72 is attached to one end portion of the lever 64. The upper end of the wire 73 is rotatably attached to the other end of the lever 64. Although not shown, a hole is formed in the other end of the lever 64, and the wire 73 is inserted in this hole.
By inserting the end bent at a right angle of,
The wire 73 is rotatably locked to the lever 64.
Incidentally. In FIG. 2, reference symbol E is a rotation detector such as a rotary encoder that detects the rotation angle of the shaft 63.

In the main body of the upright piano, a pair of link plates 74, 74 bent in a hook shape are rotatably supported by pins 74a, 74a which are laterally separated from each other. The lower end portion of the wire 73 is rotatably attached to the left end portion of the link plate 74 on the left side in the figure with the same configuration as the upper end portion. Further, both ends of the wire 75 are rotatably attached to the lower ends of the link plates 74, 74. A plate-shaped slider 76 is formed in the middle of the wire 75 in the longitudinal direction.
6 includes a pair of long holes 76a, 7 which are laterally separated from each other.
6a is formed. A drive pin 77a of an actuator (restraint means) 77 attached to the main body of the upright piano is inserted into the long holes 76a and 76a, so that the operation of the wire 75 is stopped urgently.

At the left end of the right ring plate 74,
An upper end of a wire 79 with a coupling 78 interposed in the middle is rotatably connected, and a lower end of the wire 79 is rotatably connected to a pedal 80 protruding from the front plate 17 of the upright piano. Then, under this structure, when the pedal 80 is depressed, the operation is performed by the wire 79,
It is transmitted to the lever 64 via 75, 73 and the link plates 74, 74, and the shaft 63 of the sound deadening mechanism 60 is rotated to rotate the stopper 66 to a substantially vertical position for sound deadening performance. Although not shown, the pedal 80
Is provided with a ratchet mechanism, and the pedal 80 is fixed so as not to return by the action of the ratchet mechanism once it is depressed. When the pedal is depressed again, the ratchet mechanism is released, the elastic force of the tension spring 71 causes the lever 64 to rotate, and the stopper 66 returns to a substantially horizontal initial position.

Further, the upright piano of this embodiment is provided with a detection mechanism for detecting the operation of the key 10, as shown in FIG. As shown in FIG. 3A, the key 1
A plate-shaped shutter KS is provided below 0.
A key sensor KSE is provided on the upper surface of the shelf plate 11 facing the shutter KS. The shutter KS is shown in FIG.
As shown in (B), the left corner is cut out in a rectangular shape and has a rectangular hole on the right side. Further, the key sensor KSE is provided with photo interrupters P1 and P2 at a predetermined distance in the left-right direction. When the key 10 is pressed, the edge portion KS1 of the shutter first shields the photo interrupter P1 from light, and then the edge portion. The photo interrupter P2 is shielded from light by KS2. Furthermore, the edge K
By S3, the photo interrupter P1 enters the light receiving state,
The light is shielded again by the edge portion KS4.

Next, FIG. 6 is a block diagram showing the configuration of the controller in this embodiment. The controller 200 shown in FIG. 6 is a block diagram of the photo interrupters P1 and P2.
The string striking timing Ht and the string striking speed Hv are detected from the light receiving state, and a musical tone signal is electronically generated based on this.
Further, the controller 200 in this embodiment is configured to perform various processes such as automatic performance as will be described later. Hereinafter, the controller 200 will be described in detail.

In FIG. 6, 201 is a CPU that controls each part of the apparatus. A ROM 202 stores a program used in the CPU 201.
Is a RAM in which various data are temporarily stored. The controller 200 is provided with a panel switch section 204 composed of various operators for controlling the characteristics of musical tone signals.

Reference numeral 205 denotes a sensor interface, which outputs a signal according to the light receiving state of the photo interrupters P1 and P2 provided corresponding to each key 10 to the CPU 201.
Output to. In this case, the CPU 201 recognizes which key 10 has been operated based on the signal supplied from the sensor interface 205, outputs the key code KC corresponding to this, and outputs the key-on signal KON to determine the key velocity. Output KV. Also, CPU
Upon receiving the signal from the key sensor KSE from the sensor interface 205, the 201 outputs the key-off signal KOF indicating the key-off timing based on the signal. That is, the key-off signal KOF is output at the timing when both the photo interrupters P1 and P1 in the key sensor KSE enter the light receiving state.

Actuator interface 207
Under the control of the CPU 201, supplies an exciting current to the solenoid SOL as shown in FIG. The exciting current in this case is controlled to have a current value corresponding to the key velocity KV at the timing when the key-on signal KON is output. When the key-off signal KOF is output, the exciting current is stopped and the solenoid SOL
Is de-energized. With this configuration, automatic performance is possible. In addition, the actuator drive circuit 208 uses the CP
Under the control of U201, the actuator 77 is driven to move the drive pin 77a in and out. As a result, the drive pin 7 is inserted into the long hole 76a of the slider 76 that drives the muffling mechanism 60.
7a is inserted or pulled out from the long hole 76a.

Reference numeral 210 denotes a tone generator circuit, which is the CPU 201.
Key code KC, key-on signal KON, supplied from
It is a circuit that creates a tone signal according to the key-off signal KOF and the key velocity KV. The musical tone signal created by the tone generator circuit 210 is supplied to the speaker SP or the headphones HH and is emitted as a musical tone.

(2) Operation of the embodiment a. Operation during Normal Play Next, the operation of this embodiment having the above-mentioned configuration will be described. When the key is pressed, the whip pen 23 is pushed up by the capstan 12 and rotates clockwise around the pin 22a. As a result, the jack large 26a pushes up the butt 41 to rotate the hammer assembly 40 in the clockwise direction, and the hammer 44 presses the key 1.
Strike the string S corresponding to 0. At the time of this string striking operation, the jack 26 is in the middle of its rotation and the jack small 26b
The contact with the regulating button 34 prevents further rotation in the clockwise direction. On the other hand, since the whip pen 23 continues to rotate, the jack 26 uses the regulating button 34 as a fulcrum to move the whip pen 23
With respect to this, it rotates relatively in the counterclockwise direction, whereby the upper end surface of the large jack 26a escapes from the lower surface of the bat 41 to the left in the drawing, and moves to the non-contact position with the bat 41. The action of the hammer 44 to return the rotation of the hammer assembly 40 after striking the string is temporarily stopped when the catcher 46 contacts the back check 38.
Meanwhile, the jack 26 is interlocked with the pivotal return of the whip pen 23 accompanying the return operation of the key 10, and the upper end portion of the large jack 26a enters the lower portion of the bat 41 again to enable the next string striking operation.

B. Operation during silenced performance Next, in order to enter the silenced performance state, the pedal 80 is depressed to rotate the stopper 66 from the horizontal state of FIG. 1 and face it downward. When a key is pressed in this state, the whip pen 23 is pushed up by the capstan 12 and rotates clockwise around the pin 22a. As a result, the large jack 26a pushes up the butt 41 and rotates the hammer assembly 40 in the clockwise direction. Next, the small jack 26b is the regulating button 34.
The upper end surface of the large jack 26b escapes from the lower surface of the bat 41 in the leftward direction in the figure by abutting against. Meanwhile, the hammer assembly 40 continues to rotate due to inertial force, but the string S
The catcher 46 comes into contact with the stopper 66 before it hits, and is rebounded in the counterclockwise direction. After that, the returning operation of the hammer assembly 40 and the like is the same as that in the normal performance.

In the case of mute performance, the hammer 44 moves the string S
It is bounced back before hitting the edge of the shutter KS
1, ... Shields and receives light from the photo interrupters P1 and P2, and as a result, the controller 200 detects key-on and key velocity. Therefore, the performer can listen to his / her performance through headphones or the like.

C. Operation of Preventing Catcher 46 from Biting to Stopper 66 In this embodiment, the stopper 66 is stopped by the actuator 77 when a key is pressed. FIG. 5 is a flowchart for performing the stopping process of the stopper 66.
When the key is pressed in the normal playing state, the shutter K
The front edge portion KS1 of S shields the photo interrupter P1 from light, and the signal K1 is supplied from the sensor interface 205. The signal K1 is output while one of the keys is pressed, and when all the pressed keys are released and the key-off signal KOF is generated for all the pressed keys, the signal K1 is output.
1 is cleared and is no longer output. First, step S
At Pa1, it is determined whether or not this signal K1 is supplied. If the signal K1 is supplied, step S
The determination in Pa1 is “YES”, and step SPa2
And the pin 77a of the actuator 77 moves to the slider 7
The stopper 66 is inserted into the long hole 76a on the right side of 6, and the stopper 66 cannot rotate. Then, as long as any key is pressed and the signal K1 is output, the process proceeds to step S
The state in which the stopper 66 is prevented from rotating by circulating Pa1 and SPa2 is maintained.

Next, when none of the keys is pressed, the determination at step SPa1 becomes "NO",
In step SPa3, the actuator 77 is driven to bring the pin 77a into a contracted state. This allows the strike
The top 66 is in a rotatable state. Next, step S
The process proceeds to Pa4, and it is determined whether or not the signal from the rotation detector E is supplied, that is, whether or not the stopper 66 has rotated from its substantially horizontal initial position (hereinafter referred to as the start end). If the result of this determination is "NO", then the flow returns to step SPa1 and the operation up to this point is repeated. If the determination result is "YES", the process proceeds to step SPa5, for example, a lamp (warning means) 211 is blinked or a buzzer (warning means) 212 emits a sound to warn. next,
Proceed to step SPa6, and the stopper 66 starts or
It is determined whether or not it is at the position of the turning end (end) . If the result of this determination is "YES", then the processing returns to step SPa1 ,
If the determination result is “NO”, the steps SPa5, SP
Cycle a6 to keep warning.

As described above, the pin 77a of the actuator 77 is inserted into the elongated hole 76a on the right side of the slider 76 in the case of normal performance. On the other hand, in the case of mute performance, the pin 77a is inserted into the elongated hole 76a on the left side of the slider 76.

In the upright piano having the above construction, the actuator 7 is operated when the key is depressed.
Since the slider 76 is prevented from moving by 7, the stopper 66 does not rotate even if the user operates the pedal 80 during that time. Therefore, the stopper 66 of the catcher 46
There is no bite to. In particular, in the above embodiment, since the warning is issued while the stopper 66 is being rotated,
It can catch the attention of the performer and catcher 46
It is possible to more reliably prevent the biting.

(3) Modification Example In the above embodiment, a warning is issued when the stopper 66 is rotated, but in addition to this, the key depression is performed while the stopper 66 is rotating. Even if it is performed, the control of the controller 200 may be changed so as to drive the actuator 77 to stop the stopper 66. In this case, the slider 7 is used in the above embodiment.
Since the long hole 76a is formed in 6, the drive pin 77a can be inserted and stopped even after the slider 76 has moved to some extent. With this configuration, it is possible to more reliably stop the rotation of the stopper 66 and prevent the catcher 46 from biting. Further, as shown in FIG. 4B, an actuator 81 is arranged on the bottom plate 18 of the upright piano, and a pin 81a of the actuator 81 is provided between the pedal 80 and the bottom plate 18 when a key is pressed. A spacer 81 to be inserted may be attached so that the pedal 80 cannot be depressed. Further, as shown in FIG. 4 (C), the slider 76 is sandwiched and fixed by the brake 83, so that the stopper 66 is stopped even if the key is pressed at any position during the rotation of the stopper 66. be able to.

B. Second Embodiment (1) Configuration of Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. 7 to 9. The upright piano of this embodiment is
A point that the shaft 63 of the muffling mechanism 60 is rotated by a motor (moving mechanism) M, and the panel switch unit 2
Select the normal playing state and the silent playing state for 04 Normal /
The difference from the first embodiment is that a mute changeover switch SW is provided and the motor M is driven according to the operation of the normal / mute changeover switch SW. As shown in FIG. A rotation detector E such as a rotary encoder is attached. FIG. 8A is a block diagram showing a part of the controller 300 in this embodiment. Although not shown in FIG. 8A, this embodiment also includes the same components as those shown in FIG. Therefore, in the following description, the same symbols are used for the same components. In the figure, reference numeral 30
Reference numeral 1 is a CPU that controls each part of the apparatus. The CPU 301 supplies a signal to the motor drive circuit 302, and the motor drive circuit 302 supplies a drive signal to the motor M. Further, the rotation amount of the output shaft of the motor M is detected by the rotary encoder E, and a signal according to the rotation amount is output to the CPU 301.

(2) Operation of the Second Embodiment Next, the operation of the second embodiment will be described with reference to FIG. First, in step SPb1, it is determined whether or not the key depression operation signal K1 is supplied. Signal K1
Is supplied, the determination in step SPb1 is “Y
ES ”, and the process proceeds to step SPb2. Step PS
In b2, even if the normal / silence switch SW is operated, the operation signal is controlled so as to be ignored.
Return to Pb1. Therefore, in this case, even if the normal / silence changeover switch SW is operated, the motor M is not driven and the stopper 66 does not rotate. Thus, when the signal K1 is supplied, the loop of SPb1 → SPb2 → SPb1 is repeated.

Next, at step SPb1, "NO".
When it is determined that the operation signal is output, the process proceeds to step SPb3, and when the signal from the normal / silence changing switch SW is output, the operation signal is controlled so as to be followed. Next, in step SPb4, it is determined whether the normal / silence changeover switch SW has been operated. In this case, when the normal / silence switch is pressed in the normal performance state, the silent performance state is instructed, and when the normal / silence switch is pressed again, the silent performance state is released. That is, each time the normal / mute switch SW is pressed,
Normal playing and muted playing are instructed alternately.

If "NO" is determined in step SPb4, the process returns to step SPb1 and the same operation is performed. When it is determined “YES” in step SPb4, the motor M is driven (step SPb
5). Here, in the case of the normal performance state, the motor M is rotated in the same direction as the rotation direction (forward direction).
The stopper 66 rotates from the starting end position facing the substantially horizontal direction to the ending position facing the substantially downward direction. vice versa,
In the mute playing state, the stopper 66 rotates from the end position to the start position.

Next, at step SPb6, it is judged from the detection signal from the rotation detector E whether or not the position of the stopper 66 has reached the end. Here, if the stopper 66 is in the middle of movement, the determination is "NO", the flow proceeds to step SPb7, and it is determined whether or not the signal K1 is present. That is, it is determined whether or not a key is pressed while the stopper 66 is moving. If this determination is “NO”, the process returns to step SPb5, and thereafter, step SPb5.
~ Circulate SPb7. When the movement of the stopper 66 progresses during this circulation process to reach from the start end to the end end or from the end end to the start end, the determination in step SPb6 becomes “YES”, and the process returns to step SPb1.

On the other hand, if the key is pressed during the circulation of steps SPb5 to SPb7, that is, during the movement of the stopper 66, the determination at step SPb7 becomes "YES" and the determination at step SPb8 is performed. Step S
At Pb8, it is determined whether or not the rotation amount of the motor M has reached a predetermined value. If the determination in step SPb8 is "NO", the motor M is rotated in reverse at a high speed (step SPb9), and the stopper 66 is returned to the movement start position. For example, when the stopper 66 is moving from the starting end toward the ending end, the stopper 66 is returned to the initial position in the horizontal state. As a result, the catcher 46 rotates without contacting the stopper 66. Also, step S
When the determination in Pb8 is "YES", the motor M is rotated at a high speed in the same direction (forward direction) as the rotation direction up to then (step SPb10). For example, when the stopper 66 is moving from the start end to the end, the stopper 66 is rotated to the end position. As a result, the catcher 46 comes into contact with the lower surface of the stopper 66 as in the mute playing state. After step SPb9 or step SPb10, the process returns to step SPb1 to perform the same operation as before.

In the upright piano having the above structure, when the key is depressed, the operation signal is controlled so as to be ignored even if the normal / silence changeover switch is operated, so that the motor M is driven. Without stopper 6
6 does not rotate. Therefore, even if the normal / silence changeover switch is operated after the key is pressed, the stopper 6 of the catcher 46 is operated.
No bite to 6 occurs. In particular, in the above-described embodiment, even if a key pressing operation is performed while the stopper 66 is rotating, the stopper 66 is rotated at a high speed to be retracted, so that the catcher 46 is more reliably bited. Can be prevented.

(3) Modification Example In the second embodiment, the rotary encoder E is used to detect the rotation amount of the motor M.
As shown in (B), the rotation amount may be detected by the supply time of the drive signal supplied from the motor drive circuit 401 to the motor M. Further, as shown in FIG. 8C, a pulse motor Ma may be used as an electric motor, and the number of pulses supplied from the pulse motor drive circuit 501 to the pulse motor Ma may be supplied to the CPU 502 as a signal. .

Further, in each of the above embodiments, the key sensor detects the key depression. However, a shutter is attached to a predetermined member of each hammer assembly 40, and the shutter interrupts and receives light from the photo interrupter to depress the key. May be configured to be detected. In this case, as the key depression signal K1, the signal used when the shutter first blocks the photo interrupter is used. Further, as shown in FIG. 1, by pressing any member of the hammer assembly 40, for example, the hammer shank 43, the optical axis P of the optical switch extending over the entire length of the keyboard is arranged to detect the key depression. You may comprise. Further, as shown in FIG. 3 (A), the optical axis P of the optical switch may be arranged below the key 10 to detect the key depression.
Further, in the above-described embodiment, the stopper 66 is rotated to move to the contact position with the catcher 46, but the stopper 66 may be slid in the front-rear direction of the upright piano. . in addition,
The present invention is not limited to the upright piano, but can be applied to any keyboard instrument having a catcher.

[0044]

As described above, in the keyboard instrument according to the first aspect of the invention, the sound deadening means is provided with the restraining means for preventing the movement of the stopper when the key operation is performed, and the third aspect of the invention. In the keyboard instrument described above, since the control means is provided with the control section for stopping the supply of the drive signal when the key depression operation is performed, it is possible to prevent the catcher and the stopper from biting. The effect is obtained.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a hammer action portion of a keyboard instrument according to a first embodiment of the present invention.

FIG. 2 is a front view showing details of a sound deadening mechanism.

FIG. 3A is a side view showing a key sensor section, and FIG.
FIG. 4 is a front view showing details of a shutter.

FIG. 4A is a side view showing the entire silencing mechanism,
(B) is a front sectional view of a pedal portion which is a modified example of (A),
(C) is a cross-sectional view of a slide portion which is another modification.

FIG. 5 is a flowchart showing the operation of the first embodiment.

FIG. 6 is a block diagram showing an electrical configuration of a seventh embodiment.

FIG. 7 is a front view showing a silencing mechanism according to a second embodiment of the present invention.

8A is a block diagram showing an electrical configuration of a second embodiment of the present invention, FIG. 8B is a block diagram showing a modified example of FIG. 8A, and FIG. 8C is a block showing another modified example. It is a figure.

FIG. 9 is a flowchart showing the operation of the second embodiment.

[Explanation of symbols] 10 ... Key, 20 ... String striking mechanism, 40 ... Hammer assembly (hammer mechanism), 43 ... Hammer shank, 44
... hammer, 46 ... catcher (catcher member), 60 ... silencing mechanism (silencing means), 66 ... stopper, 77 ... actuator (restraining means), 200 ... controller (controlling means), 201 ... CPU (controlling section), 2
11 ... Lamp (warning means), 212 ... Buzzer (warning means), M ... Motor (moving mechanism), KSE ... Key sensor (key pressing detection means), S ... String.

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G10C 3/16 G10C 3/18 G10C 1/02

Claims (4)

(57) [Claims] 1. A key, a hammer mechanism that pivots to strike a corresponding string when the key is depressed, and a hammer of a hammer mechanism that prevents the hammer mechanism from pivoting beyond a predetermined level. And a muffling means capable of selecting a state in which the string is not struck, and the hammer mechanism includes a catcher member that comes into contact with the cushioning member when the hammer mechanism returns to rotate after striking the string. Is a keyboard instrument equipped with a stopper that comes into contact with an end surface of the catcher member that faces the rotation direction, and a moving mechanism that moves the stopper between an initial position and a position where the catcher member abuts. A keyboard instrument characterized in that a restraining means is provided to prevent the stopper from moving when operated. 2. A position detecting means for detecting the position of the stopper, and a predetermined warning when the stopper is located at a position other than the initial position and the abutting position based on the detection result of the position detecting means. The keyboard musical instrument according to claim 1, further comprising: a warning unit that emits. 3. A key, a hammer mechanism that pivots to strike a corresponding string when the key is pressed, and a hammer of a hammer mechanism by preventing the hammer mechanism from pivoting more than a predetermined amount. Is provided with a sound deadening means capable of selecting a state in which the string is not hit, the hammer mechanism is
The muffler includes a catcher member that comes into contact with the cushioning member when the hammer mechanism returns to the rotation after striking the string. In a keyboard instrument having a moving mechanism for moving to a contact position with and a control means for supplying a drive signal for moving the stopper to the moving mechanism, the control means comprises:
A keyboard instrument characterized in that the supply of the drive signal is stopped when a key operation is performed. 4. The control means moves the stopper at a speed higher than the speed if the position of the stopper reaches a predetermined position when a key is pressed during the movement of the stopper, The keyboard instrument according to claim 3, wherein when the stopper has not reached a predetermined position, it is moved to a movement start position at high speed.