JPH11133946A - Mechanism for opening and closing topboard front of grand piano - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily open and close a topboard front from a position of a piano stool by sliding the heavy topboard front for opening and closing. SOLUTION: When a front end of a topboard front 2b is lifted from the closing condition and a rear end thereof is stood a little, a guide plate 13 engaged with a slide rail 14 in the loose-out preventing condition is moved with the movement of the topboard front 2b, and a movable wing 12b is turned so as to be stood toward a topboard rear 2a. With this structure, when the movable blade 12b is stood at a right angle, a rubber roller 15 rides over the topbaord rear 2a. When the topboard front 2b is pushed backward, the rubber roller 15 is rotated on the topboard rear 2a, and the guide rail 14 is slid along a guide plate 13 so that the front 2b is smoothly slid backward. Slide of this topboard front 2b is concluded when a stopper provided in rear of the slide rail 14 abuts on a rear edge of the guide plate 13, and the topboard front 2b arrives an opening position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grand piano front opening / closing mechanism for opening / closing the front of a large roof of a grand piano.

[0002]

2. Description of the Related Art FIG. 9 shows a general exterior of a grand piano. Large roof 52 of this grand piano 51
Is for opening and closing the side plate 5 including the frame 3 and the sound board 4 between an open position shown in FIG. The large roof 52 is generally made of a lumbar core decorative plywood that has been subjected to a mirror glossy coating with polyester resin or the like,
It is made of Lauan decorative plywood, MDF decorative plywood or the like, and is composed of a large roof rear 52a and a large roof front 52b. The rear end 52a of the large roof is connected to the side plate 5 via a hinge 56 at its lower end.
Is mounted to be rotatable. 52b in front of the large roof
It is rotatably attached to the front end of the large roof rear 52a via a hinge 57, and is foldable with respect to the large roof rear 52a. An upper bar 58 is provided at the lower front end of the large roof front 52b, and a music stand 9 is provided below the large roof front 52b.

[0003] With this configuration, the large roof 2 is closed horizontally as shown in Fig. 10 when the grand piano 1 is not playing or stored, to protect the interior parts such as the soundboard 4 and the symbol of the grand piano 1. Decorate the exterior as. In this state, the upper bar 58 is in contact with the front frame 60 fixed to the side plate 5. On the other hand, when performing, as shown in FIG.
The front 52b of the large roof is folded back (turned up) with respect to the rear 52a of the large roof, and the rear 52a of the large roof is opened and held by the large roof raising bar 52c.
By reflecting the performance sound on the surface of 2a, a richer volume and sound can be obtained. In this state, the music stand 9 is set up and used.

[0004]

As described above, in the conventional large roof 52, the music stand 9 can be used upright during the performance, and the performance sound can be reflected at the open rear roof 52a. , 52b before the roof
Must be opened and closed. On the other hand, the large roof 52 has a considerably large area and is made heavy in order to perform a complete mirror finish. Since the large roof 52b alone is quite heavy, children and women can open and close the large roof 52b with their strength. In particular, it is not easy to turn up. In addition, at the time of opening and closing, the front end of the large roof front 52b must be rotated about the hinge 57 by about 50 cm in the up-down direction and the front-back direction, respectively. Even when standing up, 52b in front of the large roof
It is difficult to open and close the piano, and you must open and close it around the piano.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a grand piano front opening / closing mechanism capable of easily opening / closing a front of a large roof from a position of a chair. The purpose is.

[0006]

In order to achieve this object, a grand piano front opening / closing mechanism for a grand piano according to the present invention is characterized in that one of two wings rotatable relative to each other about an axis pin is provided after the large roof. A hinge having substantially the same length as the thickness and having the other wing fixed behind the large roof so that the shaft pin is located near the front lower end after the large roof and extending in the left-right direction; and one wing of this hinge And a slide rail provided on the lower surface in front of the large roof and engaged with the guide member in a retaining state, and slidable back and forth along the guide member. And a roller provided at the rear end portion in front of the large roof and capable of rolling the upper surface after the large roof in the front-rear direction.

In this large-roof front opening / closing mechanism, the large roof front is
It is opened and closed by sliding forward and backward. That is,
When the front of the large roof is in the closed position, one wing of the hinge horizontally extends forward from an axial pin located near the lower front end after the large roof, and supports the rear part of the large roof.

When the front end of the large roof is held from this closed state and the rear side is slightly raised, the guide member engaged with the slide rail in a retaining state prevents the movement in front of the large roof. By following, one wing of the hinge pivots so as to gradually rise up behind the large roof. By this rotation, when one of the wings of the hinge assumes a substantially vertical posture, the roller provided at the rear lower end in front of the large roof rides over the large roof. Next, when the front of the large roof is pushed rearward, the rollers roll on the rear of the large roof, and the guide rail slides along the guide members, so that the front of the large roof slides smoothly backward and is opened. .

When closing the large roof from this open state, the front of the large roof is slid forward by holding the front end portion of the large roof and pulling it toward the front side by rolling the rollers and sliding the slide rails. Moving. And
At the end of the slide, the roller is disengaged from the front end after the large roof, and then the hinge is turned so that one wing of the hinge falls forward, thereby returning the front of the large roof to the closed state described above.

As described above, according to the opening / closing mechanism in front of the large roof according to the present invention, the front of the large roof is opened / closed in a sliding manner.
The front of the large roof can be easily opened and closed, and even children and women can easily open and close. In addition, to slide the front of the large roof, it is only necessary to hold the front end and push and pull, so that the opening and closing operation can be performed from the position of the chair.

In this case, it is preferable that the roller is constituted by a rubber roller.

According to this configuration, when the roller rolls on the back of the large roof, it is possible to prevent the surface from being damaged,
The appearance after the large roof can be favorably maintained.

In these cases, it is preferable that the upper front corner after the large roof be formed with a rounded portion.

With this configuration, at the start of the backward slide in front of the large roof, the roller can smoothly ride on the rear of the large roof via the R portion, and the opening operation in front of the large roof can be performed more easily.

In these cases, it is preferable that at least one of the front surface after the large roof and the rear surface before the large roof is inclined forward and downward.

[0016] In this configuration, the roller on the rear side of the large roof can be more smoothly run on the inclined surface after and / or in front of the large roof, and the opening operation before the large roof can be performed more easily.

In these cases, it is preferable to further include a push latch which is disposed below a rear portion in front of the large roof and is pushed by the lower surface in front of the large roof to lift the front of the large roof.

In this configuration, by pushing down the rear part in front of the large roof, the rear part in front of the large roof is lifted by the push latch, and in this state, the rollers can be made to ride on behind the large roof, so that the rollers can be smoothly climbed. The opening operation in front of the large roof can be performed more easily.

In these cases, it is preferable to further comprise a spring for urging one of the hinge wings upward.

In this configuration, one of the wings of the hinge is always urged upward by the spring, and the operating force for riding the roller can be reduced by the amount of the spring force.
Rollers can be smoothly run with less force, and the opening operation in front of the large roof can be performed more easily.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a grand piano incorporating a large roof front opening / closing mechanism according to an embodiment of the present invention. In the following description, the same components as those of the conventional grand piano shown in FIGS. 9 and 10 will be denoted by the same reference numerals, and detailed description thereof will be omitted. As shown in FIG. 1, in this grand piano 1, the front 2b of the large roof 2 is slidable relative to the rear 2a of the large roof, and the closed position shown by a solid line and the open position shown by a two-dot chain line It is designed to be opened and closed by a slide between them.

FIGS. 2 and 3 show a large roof front opening / closing mechanism according to a first embodiment of the present invention for slidingly opening and closing the large roof front 2b. As shown in both figures, this large roof front opening / closing mechanism (hereinafter simply referred to as “opening / closing mechanism”) 11
Is a hinge 12 fixed to the front end of the large roof rear 2a, and a guide plate 13 (guide member) connected to the hinge 12.
And the slide rail 14 fixed to the lower surface of the large roof front 2b.
And a rubber roller 15 provided at the rear end of the large roof front 2b.
And

The hinge 12 is made of steel, for example, and has two wings 12a, 1
2b. These wings 12a, 12b
Thickness (about 20mm) after the large roof 2a and before the large roof 2b
Each of the wings 12a is configured as a fixed wing screwed to the lower surface of the large roof rear 2a, and the other wing 12a
b is configured as a movable wing rotatable around the shaft pin 16. The shaft pin 16 is located near the front lower end of the large roof rear 2a, and extends horizontally in the left-right direction (the depth direction in the drawing). The fixed wings 12a may be fixed to the front surface of the large roof rear 2a.

The guide plate 13 is made of a steel plate or the like, and is fixed to a mounting plate 17 rotatably connected to the free end of the movable wing 12b of the hinge 12. The mounting plate 17 is attached to the movable wing 12b. It is configured so as to be freely rotatable through. Further, the guide plate 13 is engaged with the slide rail 14 so as to be slidable in the front-rear direction and not to be pulled out in the other direction. On the other hand, the slide rail 14 is attached so as to extend in the front-rear direction while being embedded in the lower surface of the large roof front 2b. With this configuration, the slide rail 14 can slide in the front-rear direction along the guide plate 13. In addition, the slide of the slide rail 14 is regulated by stopper portions (both not shown) provided before and after the slide rail 14 contacting the front and rear edges of the guide plate 13.

The rubber roller 15 is supported by a shaft 18 provided at the rear lower end of the large roof front 2b, and is capable of rolling in the front-rear direction. In this embodiment, the conventional large roof front 52b is used.
Is eliminated so as not to obstruct the sliding of the large roof front 2b, and the height of the front frame 19 attached to the side plate 5 is increased by the height thereof. The upper front corner of the large roof rear 2a is an R portion 2c.

Next, the opening / closing operation of the large roof front 2b by the opening / closing mechanism 11 having the above configuration will be described. Figure 2 shows the large roof front 2b
Is closed. In this closed state, the front end of the large roof front 2b rests on the front frame 19 and is supported by it (see FIG. 1), and the movable wing 12b of the hinge 12 is , Extends horizontally forward from the shaft pin 16 and supports the rear part of the large roof front 2b. As a result, the large roof front 2b
As shown by a solid line in FIG. 1, is closed near the front side of the large roof rear 2a and flush with the large roof rear 2a.

From this closed state, if the front end of the large roof front 2b is held and the rear side is slightly raised, the guide plate 13 which is engaged with the slide rail 14 in a retaining state becomes large. By following the movement of 2b,
The movable wing 12b of the hinge 12 rotates so as to rise toward the rear 2a of the large roof. Due to this rotation, as shown in FIG. 3, when the movable wing 12b assumes a substantially vertical posture,
The rubber roller 15 rides on the rear 2a after the large roof. In this case, the rubber roller 15 rides on the rear side 2a of the large roof via the R portion 2c, so that the rubber roller 15 can be easily climbed.

In this state, when the front of the large roof 2a is pushed backward, the rubber roller 15 rolls on the rear of the large roof 2a, and the guide rail 14 slides along the guide plate 13, so that the front of the large roof 2a is pressed. 2b slides smoothly backward. The slide in front of the large roof 2b is such that a stopper (not shown) of the slide rail 14 is provided on the guide plate 1.
3 ends by abutting on the rear edge, and
b reaches the open position indicated by the two-dot chain line in FIG. Thereafter, the rear of the large roof 2a is opened together with the front of the large roof 2b, the music stand 9 is erected, and the grand piano 1 is played with the music placed thereon.

When the performance is finished and the large roof 2 is closed, the music stand 9 is folded, and after the large roof 2a is closed,
Hold the front end of the large roof front 2b and pull it toward you. Thereby, the large roof front 2b slides forward by the rolling of the rubber roller 15 and the sliding of the slide rail 14. This sliding is completed when a front stopper (not shown) of the slide rail 14 comes into contact with the front end edge of the guide plate 13.
Is removed from the R portion 2c of the rear portion 2a of the large roof. Thereafter, when the front of the large roof 2b is further pulled to the front side, the movable wing 12b rotates so as to fall forward, thereby causing the front of the large roof 2b to be tilted.
Returns to the closed position shown in FIG.

As described above, the opening / closing mechanism 11 of the present embodiment
According to this, since the large roof front 2b is opened and closed in a sliding manner, the large roof front 2b can be easily opened and closed as compared with the conventional roll-up type, and even children and women can easily open and close. be able to. In addition, since the front 2b of the large roof can be slid only by pushing and pulling the front end thereof, the opening / closing operation can be performed from the position of the chair. Further, when the large roof front 2b slides, the rubber roller 15
Rolls on the rear of the large roof 2a, so that the surface thereof can be prevented from being damaged, and the appearance of the rear of the large roof 2a can be favorably maintained.

Next, an opening and closing mechanism according to a second embodiment of the present invention will be described with reference to FIG. In addition, this embodiment and the 3rd-5th embodiment mentioned later all 2
This is a modification for making it easier for the rubber roller 15 to ride on the rear of the large roof 2a at the start of the backward slide of the roller b.

As shown in FIG. 4, in the opening / closing mechanism 11 according to the second embodiment, the front surface of the large roof rear 2a and the back surface of the large roof front 2b are respectively inclined down to the front.
d. Other configurations are exactly the same as those of the first embodiment. Therefore, these inclined surfaces 2d
Thereby, the rubber roller 15 can be made to ride on the rear of the large roof 2a more smoothly, and the front of the large roof 2b can be more easily opened. Note that only one of the front surface of the large roof rear 2a and the back surface of the large roof front 2b may be the inclined surface 2d.

FIGS. 5 and 6 show an opening / closing mechanism according to a third embodiment of the present invention. The opening / closing mechanism 11 has a push latch 20 disposed below a rear portion of a large roof front 2b. As is well known, the push latch 20 includes a cylindrical main body 21 and a yoke 2 that slides inside the main body 21.
The yoke 22 is configured to be held at the protruding position when pressed once, and held at the retracted position when pressed again.

Therefore, in the present embodiment, the rear portion of the large roof front 2b in the closed position is pushed down, and the yoke 22 is pushed by its lower surface to project to the projecting position.
As shown by a two-dot chain line, the rear part of the large roof front 2b is lifted by the yoke 22. Then, since the rubber roller 15 can ride on the rear 2a of the large roof from this state, the rubber roller 15 can smoothly ride on the rear and the front 2b of the large roof can be easily opened. Also, after sliding the front of the large roof 2b to the closed position, the rear portion is pushed to return the yoke 22 of the push latch 20 to the retracted position, so that the front of the large roof 2b is flush with the rear of the large roof 2a. Become. In order to slide the large roof front 2b more smoothly, it is preferable to attach a roller 23 and a ball 24 to the tip of the yoke 22, as shown in FIG.

FIG. 7 shows a hinge used in an opening / closing mechanism according to a fourth embodiment of the present invention. This hinge 12
The movable wing 12b is constantly urged upward (in the direction of the arrow A in the figure) by the torsion coil spring 25. Therefore, in the present embodiment, the operating force for causing the rubber roller 15 to ride on can be reduced by the spring force of the torsion coil spring 25, so that the rubber roller 15 can ride on with a smaller force, and the large roof front 2b can be moved. It can be easily opened.

FIG. 8 shows an opening / closing mechanism according to a fifth embodiment of the present invention. In this opening / closing mechanism 11, the large roof front 2
A knob 26 is attached to the rear end of the upper surface of b. Therefore, the rubber roller 15 can ride on the rear part 2a of the large roof while lifting the rear part of the large roof 2b with the knob 26, and the front part 2b of the large roof can be easily opened by a simple configuration. .

The present invention can be implemented in various modes without being limited to the embodiments described above.
For example, in the first to fifth embodiments, the rubber roller 15
Have been described as being independent of each other, but two or more of these configurations may be applied in combination as appropriate, whereby the riding of the rubber roller 15 is further improved. Therefore, the opening operation of the large roof front 2b can be performed more easily. In addition, the configuration of the details can be appropriately changed within the scope of the present invention.

[0038]

As described above in detail, the opening / closing mechanism in front of the large roof of the grand piano according to the present invention has such an effect that the front of the large roof can be easily opened and closed from the position of the chair.

[Brief description of the drawings]

FIG. 1 is a partial side sectional view of a grand piano incorporating a large roof front opening / closing mechanism according to an embodiment of the present invention.

FIG. 2 is a side view showing the large-roof front opening / closing mechanism according to the first embodiment of the present invention in a state where the large-roof front is in a closed position.

FIG. 3 is a side view showing the opening and closing mechanism in front of the large roof in FIG.

FIG. 4 is a side view showing a large roof front opening / closing mechanism according to a second embodiment of the present invention.

FIG. 5 is a side view showing a large roof front opening / closing mechanism according to a third embodiment of the present invention.

FIG. 6 is a diagram showing a modification of the push latch of FIG. 5;

FIG. 7 is a perspective view showing a hinge used in a large roof front opening / closing mechanism according to a fourth embodiment of the present invention.

FIG. 8 is a perspective view showing a large roof front opening / closing mechanism according to a fifth embodiment of the present invention.

FIG. 9 is a perspective view showing the exterior of a conventional grand piano.

FIG. 10 is a side sectional view of the grand piano of FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Grand piano 2 Large roof 2a After large roof 2b In front of large roof 2c R part 2d Slope 11 Large opening and closing mechanism in front of large roof 12 Hinge 12a Fixed wing 12b Movable wing 13 Guide plate 14 Slide rail 15 Rubber roller 16 Axis pin 20 Push latch 25 Twist Coil spring

Claims (6)

[Claims] 1. One of two wings rotatable relative to each other about a shaft pin has substantially the same length as the thickness after the large roof, and the shaft pin is located near the front lower end after the large roof. A hinge having the other wing fixed behind the large roof so as to extend in the left-right direction, a guide member rotatably attached to a free end of the one wing of the hinge, and a lower surface in front of the large roof. And a slide rail that engages with the guide member in a retaining state and is slidable in the front-rear direction along the guide member. A roller for opening and closing the large roof of a grand piano, comprising: a roller capable of rolling an upper surface in a front-rear direction. 2. The large-roof front opening / closing mechanism for a grand piano according to claim 1, wherein the roller comprises a rubber roller. 3. The front upper corner after the large roof is formed with a rounded portion.
The opening and closing mechanism in front of the large roof of the grand piano described in 1. 4. The front of a grand piano according to claim 1, wherein at least one of a front surface after the large roof and a rear surface before the large roof is inclined forward and downward. Opening and closing mechanism. 5. The system according to claim 1, further comprising a push latch disposed below a rear portion of the front of the large roof to lift the front of the large roof upward by being pressed by a lower surface in front of the large roof. 3. The grand piano front opening / closing mechanism according to 1 or 2. 6. The apparatus according to claim 1, further comprising a spring for urging the one wing of the hinge upward.
Or the opening and closing mechanism in front of the large roof of the grand piano described in 2.