JPH09269773A - Automatic playing organ - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to cool an electromagnet actuator for giving key touch actions without increasing the cost by arranging sound producing pipes below this electromagnet actuator and cooling the electromagnet actuator with the flow of air discharged from these sound producing pipes. SOLUTION: The automatic playing by an automatic playing device 21 is executed by actuating the respective actuator bodies 22 of the electromagnet actuator 24 in accordance with the key touch actin signals successively outputted to the automatic playing device 21 from a signal processing section 16, thereby applying the key touch actions to respective keys 2a. The electromagnet actuator 24 is made to generate heat by an electromagnet effect according to the progression of playing. The air past the pipes 13 is discharged upward from the open pipes and half closed pipes among the sound producing pipes 13 arrayed below the electromagnet actuator 24. The flow of this discharged air comes into contact with particularly the frame 23 of the electromagnet actuator 24 and flows backward of an enclosure 1. Then, the electromagnet actuator 24 generating head is air cooled by the flow of the discharged air from the sound producing pipes 13 which generate sounds according to the playing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention enables a musical tone to be generated from a sounding pipe corresponding to a key on a keyboard, and a key pressing operation is automatically performed by an electromagnetic actuator to enable automatic performance. Regarding automatic playing organs.

[0002]

2. Description of the Related Art In an automatic performance organ, the above electromagnetic actuator is mainly used as a means for automatically driving a key, that is, for giving a key pressing operation to a key. This electromagnetic actuator includes a solenoid having a plunger inserted therein and a yoke that supports the solenoid. When a drive current is supplied to the solenoid through the yoke, the plunger is driven. It is attached to the organ by pressing. The electromagnetic actuator is provided for each key, and is usually arranged in a frame having a length corresponding to the keyboard at the same pitch as the keys, and is collectively installed in proximity to the rear rotation end of the keyboard together with the frame. The plunger pushes or pushes up its pivoting end.

[0003]

By the way, an electromagnetic actuator generates a certain amount of heat by electromagnetic action, and when it is installed in the vicinity of a wooden enclosure forming the outer shell of an organ, the enclosure is electromagnetic actuator. It may be deformed under the influence of heat generation. Therefore, the electromagnetic actuator and frame are made of a material with high heat dissipation, such as aluminum, to promote natural heat dissipation, or if the heat dissipation effect is not sufficient, use an air blower that uses a drive means such as a motor. It is conceivable that the actuator is forcibly cooled by air, or that the electromagnetic actuator is radiated by heat exchange means using a heat pipe.

However, in the forced air cooling, there is a drawback that the driving sound of the motor and the wind noise generated at the time of blowing air make noise and make the player uncomfortable. In addition, the heat exchange method using a heat pipe has a difficulty in designing the heat pipe to be installed in the organ.
Further, in either case, since a motor or a heat pipe is newly installed as a member for cooling the electromagnetic actuator, there is a problem that cost increase is inevitable.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an automatic playing organ which is easy to design and can cool an electromagnetic actuator without increasing the cost so much.

[0006]

The present invention has been made to achieve the above object, and an automatic playing organ according to claim 1 is provided with an enclosure and a plurality of keys. An automatic performance device having an electromagnetic actuator which is provided in the enclosure and which is provided inside the enclosure and automatically gives a key-pressing action to each key;
In an automatic performance organ having a sound producing pipe for generating a musical sound by an air flow and an air flow supplying means for supplying an air flow to the sound producing pipe, the sound producing pipes are arranged below the electromagnetic actuator. The automatic performance organ according to a second aspect of the invention is characterized in that an air flow path is provided to guide the air flow generated by the air flow supply means toward the electromagnetic actuator.

According to the automatic performance organ according to the first aspect of the present invention, when the airflow that causes the sound producing pipe to be emitted during the automatic performance is exhausted from the sound producing pipe into the enclosure, the exhaust flow is a key depression operation. It hits the inner upper electromagnetic actuator, which cools it. Since the exhaust flow of the existing sounding pipe is used, the cost increase can be suppressed. Also, since the sounding pipes are simply arranged below the electromagnetic actuator,
Design is also easy. According to the second aspect of the present invention, the electromagnetic actuator is cooled by ejecting the air flow generated by the air flow supply means from the air flow path toward the electromagnetic actuator. Since only the air flow path for ejecting the air flow to the electromagnetic actuator is added to the existing air flow supply means, cost increase is suppressed and no special design change is required.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. (1) First Embodiment A. Configuration of the First Embodiment FIG. 1 is a schematic side view of an automatic performance organ according to the first embodiment. The outer shell of this automatic playing organ is composed of an enclosure 1, and the keyboard 2 is on the left side of FIG.
The front side and the right side provided are the rear side. Enclosure 1
Shelf board 3 is fixed above the front part of
In addition, the keyboard 2 is provided. The keyboard 2 is formed by arranging a plurality of keys 2a in the front and back directions of the drawing, and an end portion on the back side is supported by a shelf plate 3 via a fulcrum 4 so as to be vertically rotatable. The rotation of the key 2a is fixed to the front part of the shelf plate 3 and guided along a pin 5 inserted on the back side of the key 2a.

Inside the enclosure 1, a blower (air flow supply means) 11 and an air chamber (air flow supply means) 1 in which an air flow generated from the blower 11 is stored under pressure.
2 are installed. The blower 11 is installed on the rear side of the bottom of the enclosure 1, and the air chamber 12 is installed in front of the blower 11. And, in the air chamber 12, the air chamber 1
A plurality of sound generation pipes 13 that generate musical tones by supplying air as an air flow from 2 are connected in series. A sounding pipe (hereinafter abbreviated as a pipe) 13 generates a musical sound of the corresponding key 2 a, is provided upright along the vertical direction with respect to the air chamber 12, and has an air flow supplied from the air chamber 12. Is supplied to the pipe 13 through the connecting pipe 14. As the pipe 13, a generally known wood pipe, a metal pipe or the like in which a sound source section having a lead is provided in the lower part of the air column which is the main body of the pipe 13 is used. There are three types of pipes 13, namely, a closed pipe whose upper end is closed, an opened open pipe, and a semi-closed pipe which is an intermediate therebetween. A pipe port plug (not shown) that opens or closes the communication portion is provided in the communication portion from the air chamber 12 to the connection pipe 14. This pipe mouth plug is interlocked with the key press / release of the key 2a, and is closed when the key is released and opened when the key is pressed, whereby an air flow is supplied from the air chamber 12 to the pipe 13. A musical sound is generated from the pipe 13.

The shelf 3 is provided with a key sensor 15 for detecting a key pressing operation as a performance information output means for detecting a key pressing operation during performance and outputting a signal. The key sensor 15 has, for example, a configuration in which photosensors including a light emitting portion and a light receiving portion are arranged as detection elements on both sides of a shutter attached to the lower portion of the key 2a, and the light emitting portion to the light receiving portion is released in the key released state. Light transmission is retained, and the light transmission state is
A device that outputs a signal indicating that the key has been pressed when the shutter is blocked by the key is adopted. The key operation signal of the key sensor 15 is sent to the signal processing unit 16 in the enclosure 1.
Is input to Further, inside the enclosure 1, a signal processor 16 and a power supply 17 for supplying electric power to the blower 11 are installed.

The key-depression operation signal obtained from the key sensor 15 is composed of pitch data indicating the key 2a depressed or released via the signal processor 16 and the timing of key depression or key-release of the key 2a. The performance data is recorded in a recording means such as a RAM or a floppy disk. And
The performance data recorded in this recording means is the signal processing unit 1.
6, pitch data and the like are sequentially read according to the timing data and output to the automatic performance device 21. The automatic performance output device 21 performs a performance, that is, a key depression operation based on the performance data.

The automatic performance device 21 includes a plurality of pipes 1.
An actuator main body 22 provided for each key 2a and a frame 23 collectively supporting each actuator main body 22 are provided above the row of pipes 3 adjacent to the rear end of the keyboard 2. And an electromagnetic actuator 24. The frame 23 extends along the keyboard 2 behind the keyboard 2 and is supported by the enclosure 1. The frame 23 is made of a magnetic material and forms a part of the magnetic path of the actuator body 22. The actuator body 22 is
The plunger 22a is inserted into a solenoid wound with a coil, and the plunger 22a operates when a drive current is supplied to the coil of the solenoid. In this case, the actuator body 22 is located at the inner end of the key 2a. The activated plunger 22a arranged above pushes the key 2a.

B. Operation of First Embodiment Next, the operation of the above-mentioned automatic performance organ will be described. When the power supply 17 is turned on, the air flow generated by the blower 11 is introduced into the air chamber 12, and the pressurized air is stored in the air chamber 12 at a constant pressure. During normal performance by the performer, the pipe mouth plug corresponding to the pressed key 2a is opened, an air flow is supplied from the inside of the air chamber 12 to the pipe 13 through the connecting pipe 14, and a musical sound is emitted from the pipe 13. Occurred and played. The air that has passed through the pipes 13 is exhausted upward from the open pipes and the semi-closed pipes of the plurality of pipes 13. When the performance is recorded during the performance, the key-depression operation signal from the key sensor 15 is recorded in the recording means via the signal output section.

The automatic performance by the automatic performance device 21 is performed by outputting the performance data recorded in the recording means to the automatic performance device 21 via the signal processing section 16.
That is, the key processing operation signal is sequentially output from the signal processing section 16 to the automatic performance device 21, and each actuator body 22 of the electromagnetic actuator 24 operates based on the signal to give a key pressing operation to each key 2a. . Here, as the performance progresses, the electromagnetic actuator 24 generates heat due to electromagnetic action. However, in the case of the present embodiment, the pipe 13 is arranged below the electromagnetic actuator 24, and the air passing through the pipe 13 is exhausted upward from the open pipe and the semi-closed pipe among these pipes 13. The exhaust flow, as shown in FIG.
In particular, it hits the frame 23 and flows toward the rear of the enclosure 1. Therefore, the electromagnetic actuator 24 that generates heat is air-cooled by the exhaust flow from the pipe 13 that is generated during the performance. When the degree of heat generation of the electromagnetic actuator 24 is high, that is, the operation is frequent, the amount of exhaust gas from the pipe 13 is naturally large at this time, so that the heat generation of the electromagnetic actuator 24 occurs regardless of the playing state. It can be suppressed.

FIG. 2 shows the heat generation temperature when the frame 23, which has a high degree of heat generation by the electromagnetic actuator 24, is air-cooled by the exhaust gas from the pipe 13 as in this embodiment and in a natural state where it is not particularly cooled. A measurement example is shown.
As is clear from this, heat generation in the frame 23 of the electromagnetic actuator 24 is suppressed as compared with the case where the frame 23 is in a natural state, and in particular, as the temperature becomes higher, the cooling effect of the exhaust flow of the pipe 13 is promoted.

By effectively cooling the electromagnetic actuator 24 in this manner, deformation of a portion of the enclosure 1 near the electromagnetic actuator 24 due to heating is prevented. In the present embodiment, since the existing exhaust flow of the pipe 13 is used without using a motor or heat pipe for air cooling, an increase in cost is suppressed and the pipe 13 is simply arranged below the electromagnetic actuator 24. Because it is only, the design is easy.

(2) Second Embodiment Next, a second embodiment of the present invention will be described. A. Configuration of the Second Embodiment FIG. 3 is a side view schematically showing an automatic performance organ according to the second embodiment. In the second embodiment, the first
In addition to the configuration of the above embodiment, a plurality of cooling hoses (air flow paths) 31 are provided from the blower 11 to the frame 23 of the electromagnetic actuator 24. FIG.
In FIG. 1, the same components as those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted.

The cooling hoses 31 are laid so that the air flow generated from the blower 11 hits the frame 23 of the electromagnetic actuator 24, and the number thereof is appropriately set so that the air flow hits the frame 23 evenly. When playing, the keys 2a are often pressed mainly in the vicinity of the center of the keyboard 2. Therefore, it is preferable that the cooling hoses 31 are piped by concentrating a plurality of them in a portion corresponding to the vicinity of the center.

B. Operation of Second Embodiment In the second embodiment, in addition to the exhaust flow of the pipe 13, the electromagnetic actuator 24 is air-cooled by blowing the air flow generated by the blower 11 from the cooling hose 31 and hitting it. It Therefore, the electromagnetic actuator 24
Is more cooled. The cooling air blown out from the cooling hose 31 has an air flow velocity in the cooling hose 31 of, for example, 10c.
If it is at least m / sec, a temperature drop of about 15 to 20 ° C can be expected when the frame 23 is at 75 ° C.

Also in the second embodiment described above, the existing blower 11 is used without using a motor or heat pipe for air cooling, and a cooling hose for applying an air flow to the electromagnetic actuator 24 is applied to the blower 11. Since only 31 is added, increase in cost is suppressed and no special design change is required.

In the second embodiment, the electromagnetic actuator 24 is air-cooled by the air cooling of the pipe 13 by the exhaust flow and the air flow from the cooling hose 31 connected to the blower 11. Enclosure 1
Even in the case of a pipe organ which is arranged on the inner side of the pipe 13 and is not air-cooled by the exhaust flow of the pipe 13, the cooling hose 31 sufficiently cools the electromagnetic actuator 24. In other words, cooling with the cooling hose 31 improves the degree of freedom in designing the arrangement position of the pipe 13. (3) Modified Example In each of the above-described embodiments, the air flow hits the frame 23, but the air flow may hit the actuator body 22 directly.

[0022]

According to the automatic performance organ according to the first aspect of the present invention, the electromagnetic actuator is cooled by utilizing the exhaust flow of the existing sound producing pipe, so that the cost increase is suppressed and the sound producing pipe is simply used. Designing is easy because it is only arranged below the electromagnetic actuator. According to the automatic performance organ according to claim 2 of the present invention, since the air flow path for cooling the electromagnetic actuator is added to the existing air flow supply means, the cost increase is suppressed and a special design change is required. I don't.

[Brief description of drawings]

FIG. 1 is a schematic side view of an automatic performance organ according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a cooling state of the electromagnetic actuator according to the first embodiment.

FIG. 3 is a schematic side view of an automatic performance organ according to a second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Enclosure, 2 ... Keyboard, 2a ... Key, 11 ... Blower (air flow supply means), 12 ... Air chamber (air flow supply means), 13 ... Sound generation pipe, 21 ... Automatic performance device, 24 ...
Electromagnetic actuator, 31 ... Cooling hose (air flow path).

Claims (2)

[Claims] 1. An enclosure, a keyboard provided in the enclosure in which a plurality of keys are arranged, and an electromagnetic actuator provided in the enclosure for automatically performing a key pressing operation for each key. In an automatic performance organ comprising an automatic performance device, a sound producing pipe for producing a musical sound by an air flow, and an air flow supply means for supplying an air flow to the sound producing pipe, the sound producing pipes are arranged below the electromagnetic actuator. An automatic playing organ that is characterized by 2. An enclosure, a keyboard provided in the enclosure in which a plurality of keys are arranged, and an electromagnetic actuator provided in the enclosure for automatically performing a key depression operation for each key. In an automatic performance organ comprising an automatic performance device, a sound producing pipe for producing a musical sound by an air flow, and an air flow supply means for supplying an air flow to the sound producing pipe, the air flow generated by the air flow supply means is An automatic playing organ characterized in that an air flow path is provided to guide it toward the electromagnetic actuator.