JP3366795B2 - Keyboard support device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard cover support device for rotatably supporting a keyboard cover such as a grand piano. 2. Description of the Related Art In general, a grand piano is constructed such that a keyboard cover is rotatably supported by fishing lugs attached to left and right inner surfaces of side plates, respectively. 5 to 7
1 shows such a conventional keyboard cover support device. In this supporting device, as shown in FIG. 7, the fishing tackle 51 is formed of a U-shaped plate, has a front protruding portion 51a protruding upward, and a rear protruding portion 51b slightly longer than this. 51a, 5
1b, a support groove 51c that opens upward is defined. The lower and front corners of the fishing tackle 51 are squared, whereas the front and rear projections 51a and 51b are provided with an R. The dimensions of the fishing tackle 51 are, for example, a width W1 of 22 mm,
The height H1 is about 35 mm. Each fishing tackle 51 is screwed to the left and right inner surfaces of the side plate 53 by two mounting screws 52 in front and rear. On the other hand, a keyboard cover 54 of a grand piano is shown in an upright (open) state in FIGS. 5 and 6, and has a rectangular flat plate portion 55 and a hanging portion 56 at the front end thereof.
And a curved portion 57 extending obliquely rearward from the rear portion of the flat plate portion 55.
Thus, they are integrally formed. A notch 58 having a width of about 6 mm is formed in the rear portion on both sides of the flat plate portion 55 in parallel to the notch 58, and the notch 58 extends in an arc shape toward the curved portion 57. An engagement pin 60 is provided at a predetermined position on a notch surface 59 of the notch 58 so as to protrude. [0004] Then, as shown in FIG.
Corresponds to the support groove 51 of the fishing tackle 51 corresponding to each engagement pin 60.
By being inserted into and engaged with c from above, it is rotatably supported between the hooks 51, and is opened and closed between an open position shown in FIG. 6 and a horizontal closed position (not shown). In this case, the notch 58 is an “escape” for the fishing tackle 51 by being opened on the back surface of the flat plate portion 55.
Is smoothly opened and closed without hitting the front protruding portion 51a of the fishing tackle 51 without being disturbed by this. However, in such a conventional supporting device, the notch 58 is formed so as to open to the back surface of the keyboard cover 54 in order to secure the escape from the fishing hook 51. Therefore, when the keyboard cover 54 is opened, the notch 58 and the fishing tackle 51 become visible. Keyboard cover 5
The back surface portion of 4 is an important part in design, which is most visible from the front of the player during the performance, and thus the appearance of the grand piano is significantly impaired with the above configuration. SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and it is an object of the invention to improve the appearance of a keyboard cover when the cover is opened without changing the overall shape of the keyboard cover. It is intended to provide a support device. In order to achieve the above object, the present invention relates to a keyboard cover support device rotatably supported by a pair of left and right support fittings attached to the inner surface of a side plate. The keyboard cover has a rectangular flat plate portion, a curved portion extending rearward from the flat plate portion, and a flat portion formed on both sides of the keyboard cover from the flat plate portion to the curved portion. A pair of closed left and right notches, and a pair of engagement pins protruding laterally in the pair of notches, respectively, the support fitting is opened upward and the engagement pin of the keyboard lid is engaged. It has a supporting groove for rotatably supporting it, and has a size and a shape so as to be within the range of the rotation locus of the peripheral wall of the notch when the keyboard cover rotates around the supporting groove. It is characterized by. [0008] According to this keyboard lid support device, the keyboard lid is inserted into the support groove of the corresponding support bracket from above with the engagement pins in the upright state, and is engaged. It is rotatably supported and is opened and closed. In this case, the support fitting has a size and a shape that fall within the range of the rotation locus of the peripheral wall of the notch of the keyboard cover when the cover rotates about the support groove. The pivoting of the notched peripheral wall does not hit the support fitting, so that the keyboard lid can be opened and closed smoothly. As described above, the escape of the keyboard lid is ensured by the size and the shape of the support bracket, so that the conventional notch opening on the back surface of the keyboard lid becomes unnecessary. The notch is invisible to the player by closing the lower portion with the back surface of the flat plate portion.
As a result, both sides of the rear surface of the flat plate portion are linear without any notch, and the rear surface of the keyboard lid is a clean rectangle, so that the appearance when the keyboard lid is opened is improved. Further, as compared with the related art, it is only necessary to close the notch with the back surface of the flat plate portion and to change the size and shape of the support bracket, and the mounting position of the engaging pin may be the same as that of the related art. The above operation can be obtained without changing the overall shape of the keyboard lid. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. 1 to 3
1 shows a support device for a keyboard cover of a grand piano to which the present invention is applied. In this supporting device, the keyboard cover 4 is made of a Lauan plywood or the like, like the conventional keyboard cover 54, and has a rectangular flat plate portion 5, a hanging portion 6 at the front end thereof, and an obliquely rearward portion from the rear portion of the flat plate portion 5. It is integrally formed with the extending curved portion 7. As shown in FIG. 1, a pair of notches 8, 8 (only one is shown) are formed on both sides of the keyboard cover 4 from the flat plate portion 5 to the curved portion 7. Each notch 8
Unlike the conventional notch 58, the notch 58 is formed from a position at a predetermined distance from the back surface of the flat plate portion 5, for example, about 3 mm to the curved portion 57 side. That is, the notch 8 opens only behind the keyboard cover 4 (the lower part in FIG. 1), and
Is closed on the back surface of the flat plate portion 5 and is not visible from the back surface side of the flat plate portion 5. For this reason, the flat plate portion 5
As shown in FIG. 2, both sides of the rear surface of the cover 4 are straight without the notch 8, and the rear surface of the cover 4 is formed into a clean rectangle, so that the appearance when the cover 4 is opened can be improved. it can. The other configuration of the notch 8 is the same as that of the conventional notch 58, and each notch surface 9 is provided with an engaging pin 10 at the same position as that of the conventional notch, protruding to the side. On the other hand, as shown in FIG. 3, a fishing bracket (supporting bracket) 1 is made of a deformed U-shaped plate made of plastic or the like, and has a front protruding portion 1a protruding upward, and a slightly upward portion. A long and wide rear projection 1b;
b, a support groove 1c that opens upward is defined. As is clear from the comparison between FIG. 3 and FIG.
Is formed to be smaller than the conventional fishing tackle 51, for example, has a width W of about 18 mm and a height H of about 22 mm. Further, not only are Rs provided on the upper surfaces of the front and rear protrusions 1a and 1b, but also the lower front corners are chamfered R portions 11. Each fishing tackle 1 is screwed to the left and right inner side surfaces of the side plate 3 by two upper and lower mounting screws 2 passed through the rear protruding portion 1b. According to the support device having the above structure, the keyboard cover 4
In a state in which the fishing hook 1 is set up as shown in FIG. 1, each engagement pin 10 is inserted from above into the support groove 1 c of the corresponding fishing hook 1 and engaged therewith. 1 and rotatably supported, and is opened and closed between an open position shown in FIG. 2 and a horizontal closed position (not shown). FIG. 4 shows how the keyboard 1 is supported by the fishing tackle 1. In the open position, as shown by the solid line, the curved portion 12a of the peripheral wall 12 forming the notch 8 of the keyboard 4 is
The straight portion 12b of the peripheral wall 12 formed by the back surface of the flat plate 5 is provided on the upper surface of the rear projection 1b of the fishing hook 1 with an R, with the front projection 1a.
And lightly contact each other. When the keyboard cover 4 is rotated clockwise from the open position, the curved portion 12a of the peripheral wall 12 of the keyboard cover 4 extends along the upper surface of the rear protruding portion 1b, and the straight portion 12b of the keyboard cover 4 faces downward. Around the R-section 11 at the front corner, it turns around while being guided,
It rotates about 90 degrees about the support groove 1c, and reaches the closed position (the two-dot chain line in the figure). As described above, in the support device of the present embodiment,
Since the fishing tackle 1 is reduced in size as a whole, and the peripheral wall 12 of the notch 8 is made to wrap around the R portion 11 formed in the lower front corner, the notch 8 is formed on the back surface of the flat plate portion 5. Even if it is closed, the peripheral wall 12 of the notch 8
Therefore, the rotation of the keyboard cover 4 can be smoothly opened and closed. Further, as compared with the conventional supporting device, only the size and shape of the fishing hook are changed, and the installation position of the engaging pin 10 remains the same as the conventional one.
The above effects can be obtained without changing the overall shape of the. In addition, the downsizing of the fishing hook 1 has an advantage that the material cost can be reduced accordingly. In the above-described embodiment, the cover of a grand piano has been described as an example. However, the present invention is not limited to the cover of a grand type upright piano having a flat plate portion and a curved portion extending rearward thereof. Of course, it can also be applied to. Further, it is possible to appropriately change the detailed configuration within the scope of the present invention, such as appropriately changing the size and shape of the fishing tackle to those other than those exemplified. As described in detail above, the keyboard cover support device of the present invention can improve the appearance when the keyboard cover is opened without changing the overall shape of the keyboard cover. It has effects such as.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a keyboard cover support device of a grand piano to which the present invention is applied. FIG. 2 is a front view showing a state in which a keyboard cover is opened. FIG. 3 is a plan view of the fishing tackle. FIG. 4 is a side view showing a state in which a keyboard cover is supported by a fishing hook. FIG. 5 is an exploded perspective view showing a keyboard gland supporting device of a conventional grand piano. FIG. 6 is a front view showing a state in which a conventional keyboard cover is opened. FIG. 7 is a side view showing a state where a keyboard cover is supported by a conventional hook. [Description of Signs] 1 Fishing tackle 1c Support groove 3 Side plate 4 Keyboard lid 5 Flat plate portion 7 Curved portion 8 Notch 10 Engagement pin 12 Notch peripheral wall

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) G10C 3/02 G10C 3/12 G10B 3/00 G10H 1/32

Claims (1)

(57) [Claim 1] A keyboard lid support device for rotatably supporting a keyboard lid by a pair of left and right support fittings attached to an inner surface of a side plate, wherein the keyboard lid is , A rectangular flat plate portion, a curved portion extending rearward from the flat plate portion, and formed on both sides of the keyboard cover from the flat plate portion to the curved portion, open rearward, and closed below at the back surface of the flat plate portion. A pair of left and right notches, and a pair of left and right engagement pins protruding laterally in the pair of notches, wherein the support bracket is opened upward and engages the engagement pin of the keyboard cover. A size and a shape such that the notch has a support groove for rotatably supporting the notch, and is within a range of a rotation locus of the peripheral wall of the notch when the keyboard cover rotates around the support groove. Of the keyboard lid characterized by having Lifting apparatus.