JPH0245910Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to an upright type piano action, commonly called a drop type, in which a wippen that operates in conjunction with a key is disposed below the key. It is particularly easy to assemble and has been improved so that the interlocking of the keys can be smoothly transmitted to the piano action.

[Conventional technology]

This type of piano action has been proposed with the aim of lowering the installation height of the action itself, lowering the height of the piano body, and making the keyboard part foldable so that it can be stored inside the piano body. It is usually constructed as shown in FIGS. 5 and 6. As can be understood from FIG. 5, the action mechanism 1 is almost the same as the action mechanism used in general upright pianos and arranged above the keys, and is linked to the key depression operation of the key 2. The mechanism is characterized in that the operating wippen 3 is located below the key 2, thereby reducing the mounting height of the action mechanism 1 itself. In this case, the transmission mechanism 5 that transmits the movement of the key 2 to the wippen 3 is as follows.
Rotating support using a flange is most desirable, but this will cause problems in assembly due to the separation capacity.
As shown in FIG. 6, a flange 6 having a wire insertion portion at its tip is fixed to the upper surface of the rear end of the key 2, and a connecting button 7 is attached to the upper end of the wire 8 by screwing and held detachably. On the other hand, one end of the lower end of the wire 8 is connected via a flange 12 to a rotating lever 11 which is disposed on the rail 9 via a flange 10 so as to be rotatable in the vertical direction. A protrusion 13 is provided on the top surface of the distal end of the rotary lever 11, and the top surface of the protrusion 13 receives and holds the lower surface of the free end of the wippen 3. Therefore, key 2
When the front end of the key is pressed, the rear end of the key 2 lifts up, raising the connection button 7, which causes the wire 8 to rise and rotate the rotating lever 11 clockwise, which in turn causes the wippen 3 to rise. is configured to rotate counterclockwise.

[Problem that the invention attempts to solve]

By the way, in such a conventional piano action, the connecting button 7 is detachably held by the flange 6, so there is no problem in terms of assembly workability, but when the key 2 is operated, the connecting button 7 does not rotate smoothly and wobbles, making it impossible to smoothly transmit the movement of the key 2. As a result, the action mechanism 1 cannot perform smooth and accurate string-striking operations, and the tactile feel of the key 2 is also affected. There was an inconvenience that it had a negative impact.

In addition, as shown in FIG. 7, there is also known a mechanism in which the lower end of the wire 8 is directly detachably connected to the wippen 3, thereby simplifying the transmission mechanism 5. Moreover, since the connecting button 7 is detachably held by a holding member 15 similar to the flange 6 shown in FIG. 6, the above problem cannot be solved at all. In addition, since the lower end of the wire 8 is simply inserted into the groove 14 formed on the front end surface of the wippen 3, the wire 8 may fall out of the groove 14 during vigorous performance, or the connection button 7 may
There was also a risk that it would come off from the holding member 15 and fall off.

[Means for solving problems]

The upright type piano action according to this invention was created in view of the above points.
In an upright piano action, in which a wippen that operates in conjunction with the pressing of a key is arranged below the key, the wippen that is operated by the key is placed above the rear end of the key up and down. a key-side flange is rotatably arranged on the wippen, an action-side flange is rotatably arranged on the wippen, and the action-side flange and the key-side flange are rotatably arranged on the wippen. and are separably connected by an intermediate member.

[Effect]

In this invention, the small wippen, the key side flange, and the action side flange are each rotatably arranged, so that the movement of the key can be smoothly transmitted to the action mechanism. Since both flanges can be separated, it is easy to assemble the action mechanism and the key.

〔Example〕

This invention will be described in detail below based on embodiments shown in the drawings.

FIG. 1 is a sectional side view showing an embodiment of an upright piano action according to the invention, and FIG. 2 is a perspective view of the flange on the action side. To roughly explain the configuration and operation of the action mechanism 1, the action mechanism 1 includes a wippen 3, which is disposed at the bottom of the center rail 20 so as to be rotatable in the vertical direction via a flange 21, and is located below the key 2.
A jack 23 whose lower end bent portion is disposed above the wippen 3 via a flange 22 so as to be freely rotatable in the front-back direction, and a jack 23 is disposed above the center rail 20 via a flange 24 so as to be freely rotatable in the front-rear direction. It includes a butt 25, a hammer 26 attached to the butt 25, and the like.

A small wippen 27 is disposed above the rear end of the key 2 on the rail 11 via a flange 28 so as to be freely rotatable in the vertical direction. The key-side flange 30 is placed on the top of the capstan button 29, and the upper end of a key-side flange 30 is disposed at the tip so as to be rotatable in the front-rear direction via a shaft pin 31. The upper end of an intermediate member 32 made of wire is connected to the lower end of the key side flange 30, and the lower end of this intermediate member 32 is arranged at the free end of the wippen 3 via a shaft pin 35 so as to be freely rotatable in the vertical direction. It is removably connected to the action side flange 33. Therefore, when the front end of the key 2 is pressed, the rear end of the key 2 lifts up and the small wippen 27 is rotated upward about its shaft 36, so the intermediate member 32 rises and the wippen 3 up and rotate counterclockwise. Then jack 2
3 also rises integrally with the wippen 3 and pushes up the butt 25, and then this jack 23 is prevented from rising by the small jack 37 coming into contact with the leg reching button 38, and the jack spring 3
The butt 25 is rotated clockwise against the button 9.
It is configured to temporarily escape from the bottom of the On the other hand, when the butt 25 is pushed up by the jack 23 and rotated counterclockwise, the hammer 26 also rotates and flies together with the butt 25, and the string 40
to hit.

In this way, the movement of the key 2 is sequentially transmitted to the capstan screw 29, the small wippen 27, the key side flange 30, the intermediate member 32, the action side flange 33, the wippen 3, the jack 23, the butt 25, and the hammer 26. It is something that

A back check wire 41 and a bridle wire 42 are further arranged on the upper surface of the free end side of the wippen 3, and the upper end of the back check wire 41 is provided with the butt 25 which returns to rotation after the string-striking operation.
A back check 44 is attached to receive the air. On the other hand, a catcher 46 is disposed in the butt 25 via a catcher shaft 47 in correspondence with the buck check 44.
The catch shaft yank 47 and the bridle wire 41 are connected by a bridle tape 48, which allows the return of the hammer 26 to follow the return of the rotation of the wippen 3, so that the return of the hammer 26 after the string-striking operation is completed. This prevents the string 40 from being struck twice due to the rebound of the hammer 26, and also speeds up the return of the hammer 26 to its initial position.

In addition, 50 is a hammer rail, 51 is a conventionally well-known damper mechanism, and 52 is a shelf board.

Here, in this embodiment, as described above, the small wippen 36, the key side flange 30, and the action side flange 33 are rotatably supported by the shaft 36 and the shaft pins 31, 35, respectively, so that there is no wobbling. The movement of the key 2 can be smoothly transmitted to the wippen 3, so that a good string-striking action can be obtained, and the touch feeling of the key 2 is also good. In addition, since the lower end of the intermediate member 32 is removably (separably) connected to the action side flange 33, the action mechanism 1 can be connected to the center rail 2 during assembly.
0, the key-side flange 30 and the action-side flange 33 may be connected by the intermediate member 32, and therefore the assembly work of the action mechanism 1 is easy.

In this case, various structures can be considered as the connection structure between the intermediate member 32 and the action side flange 33, and for example, the structure shown in FIG. 2 or 3 may be adopted. That is, in FIG. 2, a storage recess 60 is formed in the upper half of the action side flange 33 and opens at the front (or rear) thereof, and a groove 61 communicating with the recess 60 is formed in the upper surface of the flange 33, and the intermediate member A connecting button 64 is integrally provided at the lower end of the intermediate member 32 by insert molding or the like, and the lower end of the intermediate member 32 is inserted into the groove 61 at the same time as the connecting button 64 is press-fitted into the storage recess 60. The connecting button 64 is not limited to a cylindrical shape, but may have a shape that fits the storage recess 60, and a plurality of small protrusions 66 are provided on its surface to prevent it from easily coming off from the action side flange 33. You may also do so.

On the other hand, FIG. 3 shows a locking pin 67 protruding from the center of the storage recess 60 formed in the action side flange 33, and a substantially C-shaped hook portion formed at the lower end of the intermediate member 32 on the locking pin 67. It is designed to hang 68.

FIG. 4 is a sectional view showing another embodiment of the intermediate member. In this embodiment, the key side flange 30 and the action side flange 33 can be separated at the center of the intermediate member 32. Therefore, the intermediate member 32 is divided into upper and lower halves at the center, so that the first and second flange can be separated. 2 intermediate members 32A, 32B, the first
The upper end of the intermediate member 32A is inseparably connected to the key side flange 30, the lower end is provided with a connection button 64 similar to that shown in FIG. 2, and the upper end of the second intermediate member 32B is connected to the action side flange 30 as shown in FIG. 33, a connecting member 71 having a housing recess 70 for storing and holding the connecting button 64 is provided, and its lower end is irreparably connected to the action side flange 33.

In the example shown in Fig. 1, Uipen Elementary School 27
Although the case has been described in which the small wippen 27 is rotatably arranged on the rail 11 via the flange 28, this invention is not limited to this, and it is also possible to attach the small wippen 27 directly to the rear end of the key 2 so as to be rotatable. be.

Further, in the embodiment shown in FIG. 1, the lower end of the intermediate member 32 and the action side flange 33 are separably connected, but it goes without saying that the upper end and the key side flange 30 may be separably connected.

[Effect of idea]

As described above, according to the upright type piano action according to this invention, the small wippen that transmits the movement of the key to the wippen, the key side flange, and the action side flange are each rotatably supported, and the key side flange and Since the flange on the action side is connected with the intermediate member, the movement of the key can be well and reliably transmitted to the action mechanism, and a stable string-striking operation can be obtained. Furthermore, if the movement of the key is transmitted smoothly, the touch of the key will also be good. Further, since the key-side flange and the action-side flange are separably connected by the intermediate member, the key and the action mechanism can be assembled individually, and the assembly workability is also good.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing an embodiment of the upright piano action according to this invention, Fig. 2 is an exploded perspective view showing the connection structure between the flange on the action side and the intermediate member, and Fig. 3 is also on the action side. FIG. 4 is an exploded perspective view showing another embodiment of the connection structure between the flange and the intermediate member, FIG. 4 is a sectional view showing another embodiment of the intermediate member, and FIG. 5 is a side sectional view of a conventional upright piano action. , FIG. 6 is a view taken in the direction of arrow A in FIG. 5, and FIG. 7 is a side view showing another conventional example of the connection structure between the key and the wippen. 2...Key, 3...Wippen, 27...Wippen small, 30...Key side flange, 32...Intermediate member, 33...Action side flange.

Claims (1)

[Claims for Utility Model Registration] In an upright piano action in which a wippen is disposed below the key and operates in conjunction with the key press operation, the key is arranged above the rear end of the key. A small wippen that is operated by the wippen is arranged so as to be freely rotatable in the vertical direction, and a flange on the key side is arranged to be freely rotatable on this wippen small.
An upright piano action, characterized in that an action side flange is rotatably disposed on the wippen, and the action side flange and the key side flange are separably connected by an intermediate member.