JPS5846472Y2 - Roof mounting structure for keyboard instruments - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a roof mounting structure suitable for use in keyboard instruments, particularly electric pianos, etc., in which the roof can be easily attached and detached from above.

Generally, electric pianos have cords, electrical parts, etc. inside the main body.
Because it houses electrical circuits, etc., from a safety perspective, laws and regulations require that the roof be secured with screws so that it cannot be opened easily, and that it be opened using an appropriate tool.

In response to such demands, a conventional device has been put into practical use in which a fixing metal fitting of an appropriate shape is fixedly attached to the main plate, and the roof is fixed to the fixing metal fitting using a set screw.

However, in this case, installing the setscrews on the front of the device body or on the top of the roof will seriously detract from the appearance.
Usually, it is installed from the side of the main board.

However, in this type of structure, the main body of the device is often installed close to the wall, so if you want to open the roof for tuning or repairs, you will have to remove the setscrews on the side of the main plate facing the wall. There was an inconvenience in that this made it difficult to move the device itself.

Therefore, if the apparatus body is installed away from the wall surface in advance in consideration of the above problem, problems such as undesirable narrowing of the room will occur.

Therefore, in order to solve the above-mentioned problems, the present applicant has devised a roof mounting structure for a keyboard instrument in which the roof can be attached and detached from above using a simple structure, and has already filed an application.

To explain this with reference to FIGS. 1a to 1e, the external structure of the electric piano 1 consists of a pair of main plates 2a and 2b facing each other and forming the side surfaces, and an upper front plate 3 and a lower front plate. It is composed of a front plate 4, a back plate 5, a keyboard lid 6, a roof 7, etc.
The keyboard, strings, hammer mechanism, pickup, signal processing circuit, etc. are housed inside.

As shown in the figure, a substrate 8 is provided at the inner end of the roof 7.
An engaging body 11, which has an upright cylindrical support column 9 and a flat plate-shaped locking piece 10 having a larger diameter than the support column 9 integrally provided at the tip of the support column 9, is fixed with a screw. There is.

On the other hand, on the inner surface of the upper end of the parent plates 2a and 2b, an engaged body 12 having a cross-sectional shape as shown in FIG. The horizontal board 13b has an insertion hole 14 having a diameter larger than that of the retaining piece 10, and a locking piece slightly thicker than the diameter of the support column 9 provided continuously from a part of the insertion hole 14. An engagement groove 15 having a width smaller than the diameter of 10 is formed.

Moreover, a bush 16 formed of a flexible synthetic resin material, rubber, etc. and having the shape shown in the figure is fitted into the insertion hole 14 and the engagement groove 15 of the engaged body 12, so that the engagement body This prevents noise generated between the engaged body 12 when the engaged body 11 is engaged with the engaged body 12.

Therefore, when attaching the roof 7 with such a configuration, the roof 7 is attached to the main plate 2a from above so that the locking piece 10 of the engaging body 11 passes through the insertion hole 14 of the engaged body 12, as shown in FIG. , 2b, and then horizontally move the roof 7 backward as shown by the arrow e in the same figure to engage the support column 9 of the engaging body 11 with the engaging groove 15 of the engaged body 12. .

However, in this state, the locking piece 10 is locked to the peripheral portion of the back side of the engagement groove 15 of the engaged body 12, and the roof 7 is prevented from moving in the vertical direction.

After this, the roof 7 is fixed to the upper ends of the main plates 2a and 2b so that it does not shift in the front and back direction by inserting screws 18 into the mounting holes 11 and screwing them into the screw holes of the metal fittings 19 fixed to the main plate 2b. completely fixed.

Note that 20 is a cap that covers the attachment hole 17.

Therefore, this structure is excellent in that the above-mentioned problems can be solved because the roof 7 can be attached and detached from above.However, however, the bushing 16 for noise prevention is 12, and when removing the roof 7, if the roof 7 is pulled too far forward, the locking piece 10 will get caught around the back side of the insertion hole 14 and will not come out, so this can be prevented. Locking piece 1
0 has the inconvenience that manufacturing is troublesome, such as having to be provided offset from the axis of the support column 9 so that the front side surface coincides with the front side surface of the support column 9, as appropriately shown in Figure d. There is.

This invention was improved in view of the above-mentioned drawbacks, and the purpose is to provide a roof mounting structure for a keyboard instrument in which the roof can be attached and detached from above to the main board with a simpler structure. An engaging body having a locking piece having a larger diameter at the tip of the pillar is fixed to the inner surface of the roof or the upper end of the main plate, and an insertion hole having a diameter slightly larger than the locking piece is attached to the engaging body. Subsequently, a guide groove is formed on a surface facing the engaging body and has a width slightly larger than the diameter of the support column and smaller than the diameter of the locking piece, and the insertion hole is formed, followed by the guide groove. an engaged body formed of a synthetic resin material and having a retaining groove having a width slightly larger than the diameter of the locking piece formed so as to communicate with the bottom of the guide groove on the opposite surface; The above objective is achieved by fixing the roof to the inner surface of the upper end of the main plate or the inner surface of the roof.

The details of this invention will be explained below based on the drawings.

FIG. 2 shows an embodiment of the roof mounting structure for a keyboard instrument according to this invention, in which a is a cross-sectional view of a main part thereof, and b is a perspective view of a fixed body.

In the same figure, the engaging body 30 includes a cylindrical support column 32 erected on a base plate 31, and a support column 3 at the tip of the support column 32.
It has a locking piece 33 having a larger diameter than 2, and is fixed to the inner surface end of the roof 34 with a screw 35.

- The body 36 to be engaged with which the engagement body 30 engages is integrally formed of a synthetic resin material with a cross-section shaped like a curved line, as shown in the figure, and the horizontal base plate 37a is provided with the locking piece 36. 3
An insertion hole 38 having a diameter slightly larger than 3 is formed, and
A surface 39 that communicates with a part of the insertion hole 38 and faces the engaging body 30 has an appropriate depth, and has a dimension that is slightly thicker than the diameter of the support column 32 and smaller than the diameter of the locking piece 33. A guide groove 40 having a width is formed.

Further, the insertion hole 38 is provided on the back surface 41 of the horizontal substrate 37a of the engaged body 36 and at a position facing the guide groove 40.
An engagement groove 42 is formed that communicates with a portion of the guide groove 40 and has a width slightly larger than the diameter of the locking piece 33 that communicates with the bottom of the guide groove 40.

On the other hand, a screw hole 43 is formed in the vertical substrate 37b constituting the engaged body 36, and a screw 4 is provided in the screw hole 43.
4, the engaged body 36 is connected to the main plate 4.
When the roof 34 is placed on the upper end of the main plate 45, the locking piece 33 is fixed at a height position corresponding to the engagement groove 42.

A mounting hole 46 similar to that described above is provided at the rear of the roof 34, and a metal fitting 47 having a screw hole is fixed to the rear of the inner surface of the main plate 45 at a corresponding location.

Next, to explain how to attach the roof 34 with such a configuration, the roof 34 is attached to the anchoring body 3 from above the electric piano.
The engagement piece 36 may be placed so that the engagement piece 33 fits into the insertion hole 38 of the engaged body 36, and in this state, the roof 34 may be horizontally moved rearward as indicated by the arrow 48 shown in FIG.

As a result, the support column 32 and the locking piece 33 of the engaging body 30 are
As shown in the figure, an engaged body 360, a guide groove 40, and an engaging groove 4
2 each gets grooved.

Therefore, the locking piece 33 is connected to the guide groove 40 and the engagement groove 42.
In other words, the roof 34 is stopped from moving in the vertical direction.

Furthermore, in order to completely attach the roof 34 without shifting in the front-rear direction, it is fixed by inserting a screw 49 into a mounting hole 46 and screwing it into a screw hole of a metal fitting 47. covered by.

Therefore, according to such a structure, since the fixed body 36 is integrally molded from synthetic resin, manufacturing is simple, and there is no need to separately manufacture the bushing 16 shown in FIG. 1C described above. Therefore, manufacturing and assembly man-hours can be reduced.

Further, the locking piece 33 of the engaging body 30 has a structure that allows it to fit into the engaging groove 42 while being inserted into the insertion hole 38 of the engaged body 36, so that when the roof 34 is removed, the locking piece 33 It will not get caught in the insertion hole 38.

Therefore, it is not necessary to provide the support column 32 and the locking piece 33 with their axes shifted from each other as described above.

Incidentally, when removing the roof 34, it can be easily done by following the above procedure in reverse.

Furthermore, since the screw 49 cannot be installed or removed without using a tool such as a screwdriver, and because the screw 49 cannot be installed or removed, it complies with the relevant laws and regulations.

Although the above embodiment has been described with reference to the case where the engaging body is attached to the roof and the engaged body is attached to the parent plate, it is of course possible to attach this invention in the opposite manner.

However, in this case, it is necessary to make some modifications, such as forming the engaging body in a cross-sectional shape and erecting the support column on a horizontal substrate.

As explained in detail above, according to the roof mounting structure for a keyboard instrument according to this invention, the roof can be removably mounted from above the keyboard instrument with a simple structure, so the keyboard instrument can be attached closely to the wall surface. You can use the room widely.

[Brief explanation of the drawing]

Figure 1 shows an example of a roof mounting structure for an electric piano related to this invention, in which a is a general perspective view thereof, b is a perspective view of an engaging body, C is an exploded perspective view of an engaged body, and d and e are roof mounting structures. 2 shows an embodiment of the roof mounting structure for a keyboard instrument according to this invention, a is a side sectional view thereof, b is a perspective view of the engaged body, and FIG. FIG. 3 is a side sectional view showing a state in which the roof is attached to the main plate. 30... Engaging body, 32... Support column, 3
3... Locking piece, 34... Roof, 36.
...Engaged body, 38...Insertion hole, 40.
...Guide groove, 42...Engagement groove, 45...
...Main board.

Claims (1)

[Scope of utility model registration request] An engaging body having a cylindrical support column and a locking piece integrally provided with a larger diameter at the tip of the support column is fixed to the inner surface of the roof or the inner surface of the upper end of the main plate. , an insertion hole formed of a synthetic resin material and having a slightly larger shape than the locking piece; and a locking piece that is slightly thicker than the diameter of the support column and formed on the surface facing the engagement body following the insertion hole; a guide groove having a width smaller than the diameter of the guide groove, and a locking piece formed on the opposite surface corresponding to the guide groove so as to communicate with the insertion hole and also with the bottom of the guide groove. An engaged member having a retaining groove having a slightly larger width is fixed to the inner surface of the upper end of the main plate or the inner surface of the roof, and when the roof is placed on the main plate from above and below, the locking piece is inserted into the insertion hole, and when the roof is further moved in the front-back direction, the support column and the locking piece engage with the guide groove and the engagement groove, respectively, and the roof is moved in the vertical direction relative to the main plate. A roof mounting structure for a keyboard instrument, characterized in that the structure prevents movement of the keyboard.