JPS6291994A - Koto string tightening machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (a) Industrial Application Field Up until now, koto-shime tightening was mostly entrusted to professional musical instrument stores, and amateurs could not do it at all. The koto is probably the only personal instrument that requires a craftsman to tighten the strings.

(b) Problems to be solved by the invention The selvage thread is fastened at both ends as shown in Figure 4, but at the glans (the side that plays the koto), the tamakura (paper is rolled) inside it as shown in Figure 5. It is tied into a shape (wrapped into a shape). This invention is an invention in which a thread tightener is attached to this part so that the thread can be easily tightened.

(C) Means to solve the problem Now, let me explain its configuration: (A) As shown in Figure 1, the power is driven by a geared motor for household electricity with a large reduction ratio, and is connected to a thread tightening rod. However, it is flexible.

CB) Figure 2 shows a thread tightening machine in which a worm screw (1) and a worm gear (2) are combined in a case to form a speed reduction device. The shaft on one side of the worm gear is the bobbin winder (3), and there is a through hole (4) through which the thread passes.

(C) One of the shafts of the worm screw is connected to a geared motor at a connecting portion (5) protruding from the case.

(D) When tightening the thread, pull the thread out from the thread hole and fasten it to the thread tightener as shown in Figure 4.

That is, insert the thread from the upper thread hole (6) of the case, insert it into the thread hole (4), and turn the worm screw to stop the thread. When finished, put it inside the koto through the sound hole.

(E) Secure the other end of the string with the koto's dragontail (the side that is not played) as before. It is difficult to stop this, and the technique
It requires strength and cannot be done by amateurs, but
With this invention, this method of stopping is only a formality! The E method is fine.

(F) Once both are secured, insert the flexible piece shown in Figure 1 into the connecting part (5), turn on the trL source, and rotate to tighten the thread. 5 Make this into 13 threads.

4 Utility of invention No power, skill, or experience is required.

There is no need to ask a craftsman or bring a large koto to tighten it, and you can do it yourself. Depending on the tone of the piece, all the strings of the koto are often tuned for high notes or for low notes, and it is often difficult for the pieces to clash with each other. Even in such situations, with the simple operation of connecting the strings, you can adjust the tension of the 13 strings to the same strength by tightening or loosening the strings by rotating the motor in the forward or reverse direction.

Since it has a two-stage reduction using a geared motor and a worm gear, the rotation ratio is very high, so it can be tightened easily with a small motor.

Since the winding is not done for a short time, the tuning can be done correctly.

Another embodiment: A battery-powered motor is convenient for carrying. You can also use a manual handle instead of a motor.

[Brief explanation of drawings]

Figure 1 is a perspective view of the power plant. Figure 2 is a front view of the thread tightener Figure 3 is a side view of the threading machine. Figure 4 is a perspective view of the koto. Figure 5 is an illustration of tightening the threads of the koto dragon head. 1... Worm screw 2... Worm gear

Claims (1)

[Claims] Power geared motor and speed reducer Combine the worm gear and thread the worm gear. Attached the roll Kotoito tightening machine configured as above