JPS6025089Y2 - Wound string locking device for pianos, etc. - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a winding string locking device for pianos, electric pianos, etc.

In a conventional piano, etc., as shown in Fig. 1A, a wound string W, in which a copper wire is wound around a core wire a at a predetermined position, is connected one by one to a hitch pin C with a locking part d at the end thereof. It was stopped and put up.

As shown in FIG. 1B, this locking part d is made by twisting the folded core wire a about five times and wrapping it around three more times to prevent it from loosening.

However, since a large force is applied to this center twisting part due to the tension of the string, if there is a machining defect, the winding becomes weak and the pitch is likely to decrease.

In addition, when tensioning the wire-wound strings, the winding start and winding end positions of the copper wire string must be set at predetermined positions, and this must be done for each string while locking it to the hitch pin d. Therefore, the disadvantage is that the work process becomes complicated.

Further, in a piano stringing structure in which strings are stretched between hitch pins and tuning pins, at least one auxiliary hitch pin is implanted between a pair of adjacent hitch pins and positioned closer to the hitch pin side than these pins. Then, one end of the piano wound string is wound around one tuning pin corresponding to the above-mentioned hitch pin and locked, and the middle part is wound around the auxiliary hitch pin and the other hitch pin in order from the one hitch pin corresponding to the tuning pin. There is a known stringing structure for piano wound strings in which the other end is wrapped around and locked to another tuning pin corresponding to the other hitch pin (Utility Model Application No. 53-20026), but < -t
Since an auxiliary hitch pin must be installed in addition to the hitch pin corresponding to each string, the number of pins increases and the number of man-hours required to manufacture the frame increases.

In addition, in a piano needle tip pillow that is disposed on the upper surface of the tip of the frame and presses the stretched strings, both ends of a metal piece integrally formed with a chevron-shaped concave strip on one side are connected to the concave strip. There is a known piano needle tip pillow (Utility Model Application No. 53-46825), which is characterized by bending the strings inward and holding the strings between the bent portion and the straight portion. A wire pillow must be prepared, and this wire pillow cannot prevent the string from sliding, which increases the cost and, if this string is a wound string, the wire to be wound around the core wire is difficult to wrap at the beginning and end of the winding. There is a drawback that the position cannot be set to a predetermined position.

The purpose of this invention is to eliminate the above-mentioned conventional drawbacks, and the wire is wound in two places at a predetermined interval around a core wire that is approximately twice the length between the tuning pin and the hitch pin. and is folded back at a predetermined distance from the beginning of one winding of the ridge and the end of the other winding of the ridge to form two wound strings, and the two winding strings are folded at a predetermined distance from the turning point. A string locking part formed by twisting the two wound strings together an appropriate number of times locks the string to the hitch pin, and a pin is implanted in the frame together with the pin near the hitch pin. It is characterized by being clamped and stretched over a frame.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 shows one embodiment thereof.

As shown in Figure 2A, the copper wire 2 is wound around the core wire 1, which has a length approximately twice as long as the length between the tuning pin and the hitch pin, at two locations at a predetermined interval. Two wound strings W1 are folded back from a predetermined distance from the end.
．． Create W2 and place 2 at a predetermined distance from the turning point.
The string locking part 5 formed by twisting the wound strings together an appropriate number of times is locked to a hitch pin 6 as shown in FIGS. 2B and 2C, and a frame is provided near the hitch pin 6. The pins 8 planted at the ends of the strings W19 and W2 were put in tension by wrapping the other ends of the pins 8 around the tuning pins.

The pin 8 is connected to the wound string W1. This is a member for setting the distance between W2.

In this way, according to the present invention, the wire is wound at two places at a predetermined interval around a core wire having a length approximately twice the length between the tuning pin and the hitch pin, and the winding start of one of the ridge wires is The wire is folded back at a predetermined interval from the end of the other winding to form two wound strings, and the two wound strings are folded back at a predetermined interval from the folding point. Since it is locked to the hitch pin by the string locking part formed by twisting the string together an appropriate number of times, and is stretched on the frame by sandwiching the pin that is installed in the frame together with the hitch pin near the hitch pin, Unlike conventional methods, there is no decrease in pitch due to loosening of the hitch pin locking part of the string, and there is no need to lock each wound string to the hitch pin, and there is no need to lock the strings at the start and end of winding. This has the effect of significantly simplifying the work process for equal tension strings in which the tension string can be set at a predetermined position.

Further, since the number of pins installed in the frame is small or a separate string spacing holder is not required, the number of man-hours is reduced and costs are reduced.

[Brief explanation of the drawing]

Figures 1A and B show a side view of a conventional wire-wound string locking device and a plan view of the wire-wound string, and Figures 2A, B, and C show an embodiment of the present invention; A plan view, B is a side view of the wound string locking device, and C is a plan view thereof. 1... core wire, 2... winding wire, Wl,
W2...Wound string, 5...Zen locking part, 6
...Hitchipin, 7...Frame 8
666@II@pin.

Claims (1)

[Scope of utility model registration request] A wire is wound at two places at a predetermined interval around a core wire whose length is approximately twice the length between the tuning pin and the hitch pin, and the wire is wound at a predetermined distance from the beginning of two windings of the ridge wire and the end of the other winding of the ridge wire. Two wound strings are formed by folding back from a distance, and the two wound strings are formed by twisting the two wound strings together an appropriate number of times at a predetermined distance from the folding point. A winding wire for a piano, etc., characterized in that it is locked to a hitch pin by a formed string locking part, and stretched on a frame with a pin planted in the frame together with the hitch pin in the vicinity of the hitch pin. String locking device.