JPS5939748Y2 - Uitzpen in the action of a vertical piano - Google Patents

Description

[Detailed description of the invention] This invention relates to a Uitzpen that allows the jack to return more quickly in the piano action of a vertical piano.

Figure 1 schematically shows the action of a normal vertical piano, and to explain its operation, by hitting the keyboard K, the Uitzpen 1 is pushed up via the capstan button Ka and the Uitzpen heel 1a. , the movement of the witspen 1 is transmitted to the L-shaped jack 2 via the jack flange 1b, the upper end 2a of which pushes up the hammer butt 3, and the hammer butt 3 is rotated as shown by the dotted line to strike the string with the hammer h. Immediately before the string is struck, the bent end 2b of the jack 2 is brought into contact with the regulating button 41 to break the contact between the upper end 2a of the jack 2 and the hammer butt 3 as shown by the dotted line, and after the string is struck, the hammer butt 3 and the Back check 6 to one catcher 5
bring it into contact.

Further, a spring 7 provided between the bent lower end portion 2b and the jack 1 allows the upper end 2a of the jack 2 to return to a predetermined position below the hammer butt 3 after the string is struck.

By the way, since the conventional Witsupen 1 is configured as a simple horizontal rod, the jack 2 installed on it
does not return to the predetermined position below the hammer butt 3 immediately after the string is struck, but tends to return to the predetermined position when the keyboard K has almost returned to its original position, compared to a grand piano. There is a drawback that the repeat operation of jack 2 is slow.

Therefore, the present invention provides a jack that allows the jack to return to a predetermined position immediately after a string is struck in the action of a vertical piano.

Figures 2 and 3 show an embodiment of this invention, and numeral 10 is a horizontal rod-shaped uizpen consisting of a main rod 11 on the left side and a sub-rod 12 on the right side, and the left end of the sub-rod 12 is bifurcated. The main rod 11 is butted against the tenon 11a at the right end and is attached bendably with a pin 13.The main rod 11 is provided with a mounting seat 11b at the left end, and as shown in Fig. It is rotatably attached to the center rail R via the Tsupen flange IC, and a jack flange 1b is planted on the upper surface of the right end of the main rod 11, and the bent base of the L-shaped jack 2 is pivotally supported on the upper end of the jack flange 1b. , its upper end 2a is in contact with a predetermined position on the lower side of the hammer butt 3 as described above, and a witspen heel 11C is fixed to the lower surface of the right end of the main rod 11 so as to project toward the sub-rod 12. It is in contact with the capstan button Ka on the keyboard.

For this reason, the sub-rod 12 can be bent only upwardly at the required angle with respect to the main rod 11.

On the other hand, a back check 6 and a priddle wire 14 are planted on the secondary rod 12, and the upper surface of the left end and the jack 2
A sub-rod 12 and a main rod 11 are located between the lower surface of the bent tip 2b of the
A restoring coil spring 15 is disposed to the right of the pivot pin 13.

Note that 16 is a felt material stuck to the abutting surface of the right end of the main rod 11.

Therefore, when the tip of the keyboard is pressed down during a performance, the Uitzpen 10 is rotated upward via the capstan button Ka, but at that time, the main rod 11 and the secondary rod 12 rotate as one. A hammer butt 3 is pushed up by the upper end 2a of the jack 2 and rotated backward (leftward in the figure) to strike a string with the hammer.

Then, just before this, the bent tip 2b of the jack 2 hits the regulating button 4 as described above, and after the string is struck, the upper end 2a of the jack 2 is pulled away from the hammer butt 3 as shown by the dotted line in the figure.

In this state, if the pressing force on the keyboard is slightly relaxed, the capstan button Ka will descend and the wits pen 10 will also rotate downward, but the back check 6 will not be installed on the secondary rod 12. Since the felt surface is in contact with the felt surface of the catcher 5 integrated with the hammer butt 3, the sub-rod 12 descends later than the main rod 11 due to mutual abrasion, and It will bend upward and momentarily descend in this state.

Therefore, the coil spring 15 disposed between the upper surface of the secondary rod 12 and the bent lower surface of the jack 2 also continues to be compressed, and the engagement between the catcher 5 and the back check 6 becomes slightly longer. As a result, the return of the hammer butt 3 is delayed a little, and as soon as the bent end 2b of the jack 2 is released from engagement with the regulating button 4, the jack 2 is immediately rotated counterclockwise by the spring force. Therefore, the jack 2 returns to the predetermined position below the hammer butt 3 more quickly than before.

As mentioned above, in this invention, the wippen is divided into two parts, the main rod and the sub-rod, and the sub-rod is attached so that it can be bent upwards relative to the main rod.
A coil spring is installed between the upper surface of the secondary rod and the bent lower surface of the jack, and a back check is installed on the upper surface, so the jack returns faster than conventional ones when playing, and repeat operation is possible. There will be no lag.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the action of a general vertical piano. FIG. 2 is a side view of a part of the action using the wippen according to this invention. Figure 3 is a plan view of the wippen according to this invention. In the figure, 1 and 10 are Witsu pens, 2 is a jack, 2a is its upper end, 2b is a bent tip, 3 is a hammer butt, 5 is a catcher, 16 is a back check, 7.15 is a coil spring, 11 is a main rod, 12 is the splint, 13 is the pin, la, l
lc is wippen heel.

Claims (1)

[Scope of utility model registration request] It consists of a horizontal rod-shaped main rod 11 and a sub-rod 12. The sub-rod 12 is pivoted to one end of the main rod 11 so that it can be bent only upwards, and a jack flange 1b is mounted on one end of the main rod 11. At the same time, an L-shaped jack 2 is rotatably supported on the upper end of the L-shaped jack 2, and the other end is rotatably attached to the center rail R via a wippen flange 1c, and the upper surface of the sub-rod 12 and the jack 2 are bent. A wippen for the action of a vertical piano, in which a coil spring 15 is disposed between the sub-rod 12 and a back check 6 installed on the upper surface of the sub-rod 12.