JPH0572594B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a player piano that is easy to install and that allows accurate sound stop information to be detected.

[Prior art]

In general, a player piano that has not only a playback function but also a recording function has a hammer sensor that is used during recording to detect the volume (string-striking speed) and string-striking timing, and a hammer sensor that detects the key name and timing when the sound stops. It is equipped with an information sensor.
Of these, the latter performance information sensor is usually arranged in a space between the shelf board and the key, and is configured to be opened and closed by the operation of the key.

However, in such conventional player pianos, the performance information sensor is installed between the shelf board and the key, which makes the installation work cumbersome and troublesome, and once the key is assembled into the instrument body after installation, It was extremely difficult to check the operation of the sensor, adjust it, etc.

Furthermore, since the performance information sensor and the hammer sensor are separated, it has been difficult to use common mounting members, printed circuit boards, etc. for both sensors.

Furthermore, although the action mechanism and damper mechanism operate in conjunction with the key, they do not strictly correspond to the movement of the key, so even if the movement of the key is faithfully detected, it may not be possible to accurately detect the sound stop information. Therefore, it was not possible to obtain accurate sound stop timing. In particular, in special playing techniques such as statucato and rapid repeated hits, keystroke information from keys,
There is noticeable inaccuracy in the sound stop information, making it difficult to record faithfully.

[Summary of the invention]

The present invention has been made in view of the above-mentioned points, and the automatic performance piano according to the present invention includes a piano action mechanism 7 or 75, a damper mechanism 20 or 76, and a performance information sensor 40. In the performance piano, the piano action mechanism 7 or 75 has a component 10 or 11A that moves in conjunction with the damper 23 of the damper mechanism 20 or 76, and the performance information sensor 40 moves the component 10 or 11A. Upon detection, a signal indicating that the damper 23 has been moved is output.

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

Fig. 1 is a side sectional view showing an embodiment of the action mechanism of a vertical player piano equipped with a performance information sensor according to the present invention, Fig. 2 is a sectional view of the performance information sensor, and Fig. 3 is a sectional view of the hammer sensor. FIG. In FIG. 1, a keyboard reed 2 is placed on a shelf 1 of a player piano, and a large number of keyboard reeds ( For example, 88 keys 3 are arranged in parallel with each other supported at their intermediate portions so as to be swingable in the vertical direction. The key 3 is normally pressed by hand, and during automatic performance, the actuator 6 disposed between the shelf board 1 and the rear end 3a of the key 3 allows the key 3 to be pressed as if by hand. It operates as if it were

A known action mechanism 7 is disposed above the rear end 3a of the key 3. The action mechanism 7 includes a wippen 10 whose one end is pivotally supported by a sensor rail 8 and is pushed up and rotated by a capstan 9 when the key 3 is operated, a jack 11 rotatably attached to the wippen 10, and the sensor rail. a butt 12 which is rotatably supported on the butt 8 and pushed up and rotated by the jack 11; a catch 14 attached to the butt 12 via a catch shank 13; and a hammer 15 also attached to the butt 12. When the wippen 10 moves up and rotates in conjunction with the key press operation, and the jack 11 pushes up the butt 12, the hammer 15 rotates together with this and strikes the string 5. It is configured.

The sensor rail 8 is further provided with a well-known damper mechanism 20. This damper mechanism 2
0 is a damper 23 which is disposed via a damper wire 22 to a damper lever 21 whose intermediate portion is rotatably supported by the sensor rail 8, and whose damper 23 normally presses the string 5 to prevent its vibration. It consists of a damper spoon 24 etc. installed on the rotation fulcrum side of the wippen 10, and as the wippen 10 rotates upward, the damper spoon 24 presses the lower end of the damper lever 21 and rotates it. The damper 23 is configured to be spaced apart from the string 5. The center rail 8 to which the action mechanism 7 and the damper mechanism 20 are attached has two or three rails erected on the shelf board 1 and whose upper end is connected and fixed to the frame 4 by an action bolt 25. It is supported by a bracket 26. Also, 27 is a hammer rail,
28 is a resetting button, 29 is a back check, and 30, 31, and 32 are springs.

In front of the action mechanism 7, a sensor bracket 35 whose upper end is fixed to the bracket 26 is arranged substantially vertically, and on the back side of the sensor bracket 35, each action mechanism 7 is connected.
Wipen 10 and Catcher Shank 13
A large number of performance information sensors 40 each corresponding to
and hammer sensor 50 are arranged via a common printed circuit board 60.

As shown in FIG. 2, the performance information sensor 40 includes a sensor mounting member 41 having a notch groove 42 in the vertical direction on its distal end surface, and a pair of left and right parts forming the notch groove 42 of the sensor mounting member 41. A light-emitting element 44 and a light-emitting element 45 such as a light-emitting diode and a phototransistor are embedded in the vertical walls 43a and 43b, respectively, and face each other. and a shutter 47 that is raised and inserted into the cutout groove 42 of the sensor mounting member 41 to block the light of the light emitting element 44 received by the light receiving element 45. The shutter 47 is the light emitting element 4
When the light of 4 is blocked, the voltage of the light-receiving element 45 becomes high level and the switch is turned on, and the signal at this time is sent to a data recorder (not shown) and recorded as key name information. Further, when the string-striking operation by the hammer 15 is completed and the shutter 17 rotates downward together with the wippen 10 and exits from the notch groove 42, the light from the light receiving element 44 is transmitted again to the light receiving element 4.
5, the switch returns to the OFF state, and the signal at this time is sent to the data recorder and recorded as sound stop information. Although this sound stop information is obtained by the return of the action mechanism 7, the action mechanism 7 and the damper mechanism 20 maintain a more accurate interlocking relationship than the interlocking relationship between the key 3 and the damper mechanism 20. , the sound stop information is recorded with higher fidelity than conventional key-based sound stop information.

The hammer sensor 50 is a sensor mounting member whose distal end extends above the catcher shank 13 and has a pair of left and right sensor mounting portions 51A and 51B facing each other on the distal end surface, as shown in FIG. 51, and a pair of upper and lower light-emitting elements 52A, 52B and a light-receiving element 53A, which are buried in the sensor mounting parts 51A, 51B so as to face each other, respectively.
53B, the catch yank 1
3 and the catcher 14 are raised when the action mechanism 7 is operated, and the pair of sensor mounting portions 51 are
The light receiving elements 53B and 53A are inserted between A and 51B.
The light emitting elements 52B and 52A are configured to sequentially block the light received by the light emitting elements 52B and 52A. Here, when the light from the light emitting elements 52B and 52A is sequentially blocked and the voltage of the light receiving elements 53B and 53A becomes high level and the switches are turned on one after another, the signal at this time is sent to the data recorder and recorded. Ru.
The time from when the light-receiving element 53B is turned on to when the light-receiving element 53A is turned on is shorter when the string-striking speed of the hammer 15 is faster, and longer when it is slower, so by measuring this, the string-striking speed can be directly calculated, i.e. String strength (volume) can be detected. Therefore, by using this string striking information, more accurate sound production control is possible, and faithful performance information recording is possible.

Thus, according to the performance information sensor 40 described above, since it is arranged in front of the wiping part of the action mechanism 7, it is easier to install, adjust, maintain, inspect and replace the sensor 40 than when it is arranged below the key 3. The work is extremely simple and easy, and the workability can be improved. In addition, the prelude information sensor 4
0 is attached to the sensor bracket 35 together with the hammer sensor 50, both sensors 40 and 50 can be assembled at once, further improving work efficiency, and since the sensor bracket 35 is commonly used. , the number of parts can be reduced.

FIG. 4 is a side sectional view of the main part when the present invention is applied to a grand type player piano. In this embodiment, a sensor bracket 71 bent into a substantially hook shape is fixed to the shank rail 70 via a base bracket 72, and a performance information sensor 40 is attached to the lower end of the sensor bracket 71 in correspondence with the small jack 11A of the jack 11. , and a hammer sensor 50 is provided at the top end of the hammer shank 73 extending above the hammer shank 73 in correspondence with the hammer shank 73 . Note that the configurations of the performance information sensor 40 and the hammer sensor 50 are completely the same as in the above embodiment.

Furthermore, since the action mechanism 75 and damper mechanism 76 of the grand player piano are conventionally well known, detailed explanations of their configurations and the like will be omitted.

Performance information sensor 40 having such a configuration
Also, the sensor 40 is connected to the action mechanism 7.
Since the opening and closing of the jack 11A as a rotating part is controlled by the small jack 11A disposed in front of the casing 5, it is obvious that the same effects as in the above embodiment can be obtained.

In each of the above embodiments, the performance information sensor 40 is composed of a light emitting element 44 and a light receiving element 45,
I explained the case of using a non-contact switch, but
Of course, the present invention is not limited to this, and a switch using a bullet contact may also be used.

Further, in the above embodiment, the performance information sensor 40 is arranged corresponding to the wippen 10 and the small jack 11A, but the sensor 40 is not limited to this and may be placed anywhere as long as it is directly connected to the wippen 10.

〔Effect of the invention〕

As explained above, the automatic performance piano according to the present invention includes the piano action mechanism 7 or 75,
Damper mechanism 20 or 76 and performance information sensor 4
0, the piano action mechanism 7 or 75 has a component 10 or 11A that moves in conjunction with the damper 23 of the damper mechanism 20 or 76, and a performance information sensor 40.
Since the system outputs a signal indicating that the damper 23 has been moved by detecting the component 10 or 11A, it requires more installation, adjustment, and adjustment than when the performance information sensor is placed below the key. Its benefits include simple and easy maintenance and inspection work, improved work efficiency, and the ability to obtain faithful stop-stop information, eliminating inaccuracies in special playing techniques such as staccato and rapid repeated hits. It's very large.

[Brief explanation of the drawing]

FIG. 1 is a sectional side view showing an embodiment of the action mechanism of a vertical player piano equipped with a performance information sensor according to the present invention, FIG. 2 is a sectional view of the performance information sensor, and FIG. 3 is a sectional view of the hammer sensor. 4 is a side sectional view of the main part when the present invention is applied to a grand type automatic performance piano. 3...key, 7...action mechanism, 10...wippen, 11...jack, 20...damper mechanism, 21...damper lever, 23...damper, 24...damper spoon, 35...sensor bracket, 40...Performance information sensor, 41
...Sensor mounting member, 44...Light emitting element, 45
... Light receiving element, 47 ... Shutter, 50 ... Hammer sensor, 72 ... Hammer shank.

Claims (1)

[Claims] 1. A player piano having a piano action mechanism 7 or 75, a damper mechanism 20 or 76, and a performance information sensor 40, wherein the piano action mechanism 7 or 75 is connected to the damper mechanism 20 or The performance information sensor 40 has a component member 10 or 11A that moves in conjunction with the damper 23 of 76.
A self-playing piano that outputs a signal indicating that the damper 23 has been moved by detecting 1A.