JPH09325763A - Arm of grand piano and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the period for forming arms and to reduce the cost for working, equipment, etc., by providing a grand piano with arm sections which have a prescribed shape to meet the shape of arm and arm boards which have the shape meeting to the shape of the arm sections of side boards and are fixed to the arm sections. SOLUTION: The arms 10 are disposed at the right and left and front ends of the side boards of the grand piano. Namely, the arms 10 are disposed at the respective front ends of left flat boards 2 and right flat boards. The arms 10 are composed of the arm sections 10a which are formed at the front end of the left flat boards 2 and are formed to the shape along the design of the arms 10 and the arm boards 1 which have the shape meeting to the shape of the arm sections 10 of the left flat boards 2 and are fixed to the arm sections 10a. The arm boards 1 consist of the plywood similar to the side board. Then, the discrete working of the small and light arm boards 1, the left flat boards 2 and the right flat boards is eventually merely necessitated with the arm boards 10 and in its manufacture in place of the conventional working to handle the large and heavy side boards and the inner rim as one unit, i.e., cutting of the front end face and mounting of decorative veneers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grand piano arm and a method for manufacturing the same.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional armpiece of a grand piano and a method of manufacturing the armrest. In this arm 100, after adhering one continuous side plate 105 to the outer periphery of the loading 107 having the outer shape of a grand piano, the front end portions of the loading 107 and the side plate 105 are subjected to the following processing, It is made. The loading 107 is made of wood such as a pile of thick muku boards such as elm and matoa that are piled up in bricks. The side plate 105 is made of, for example, plywood in which a plurality of veneers such as lauan and decorative veneers such as hippo and macaw are laminated, and is bent in advance to a predetermined shape.

First, as shown in FIG. 4A, the left and right side plates 101 are in contact with the upper surface of the stack 107 and the side plate 1
05 and the upper surface are flush with each other so that the side plate 105
Glue to the inner surface of the front end of the. The left and right side plates 101 are made of plywood similar to the side plate 105. Next, as shown in FIG. 2B, the side left and right plates 101 are cut together with the side plates 105 and the loading 107 by using a cutting machine such as a moulder, thereby processing into a shape according to the design of the armrest 100. After that, a decorative veneer 10 on the cutting surface
Adhere 8 Then, by painting the surface including the decorative veneer 108, the arm 100 as shown in FIG.

[0004]

However, in the above-described conventional arm and the method for manufacturing the same, the loading 107 and the side plate 10 are not provided.
After bonding 5, i.e., the large and heavy side plate 105 and the stack 10 to have the outer shape of a grand piano.
Since the arm 100 is processed for 7,
There is a drawback that the target in each manufacturing process is large and difficult to handle. For this reason, a cutting machine such as a moulder, a painting facility, and the like are large-scaled, which increases facility costs.

Also, in the painting process, the side plate 105 and the loading 1
Since 07 has a curved portion, the entire coating surface cannot be placed in a horizontal state, and therefore spray coating or the like is unavoidable. Then, in order to prevent the paint from dripping during the spray coating, it is necessary to use a paint having a low flowability and to apply the paint repeatedly. This inevitably requires repeated coating and drying, which increases the time required for coating and prolongs the overall manufacturing period.

[0006] The present invention has been made to solve the above problems, and can easily manufacture a brace, thereby shortening the manufacturing period and reducing the cost of processing and equipment. , A grand piano arm and a method for manufacturing the same.

[0007]

In order to achieve the above object, the arms of the grand piano according to claim 1 of the present invention are formed on the front end of the side plate and have a predetermined shape that matches the arms of the grand piano. And a arm-joint board having a shape that matches the arm-joint portion of the side plate and fixed to the arm-joint portion.

[0008] This armrest is composed only of the armrest portion of the side plate and the armrest board. That is, the armboard portion of the side plate is molded to match the shape of the armboard of the grand piano, and the armboard board is formed to match the shape of this arm member and fixed to the arm member.
Arms can be constructed without loading. Therefore,
In this armpiece, instead of the large and heavy loading of the side boards, it is sufficient to separately process the small and light armboard boards, so that they are easier to handle, easier to process, and easier to manufacture.

Further, in the armpiece of claim 1, it is preferable that the side plate is composed of a plurality of plates including a flat plate forming a front straight portion of the side plate.

In this structure, since the left and right front straight portions of the side plate are made of flat plates, the arms are formed at the front ends of the flat plates. Therefore, in this armpiece, instead of targeting the entire large and heavy curved side plate in the related art, only the small and light flat flat plate may be processed separately, so that the armarm can be manufactured more easily.

Next, the method for manufacturing the arms of the grand piano according to claim 3 includes a step of forming an arm member of a predetermined shape which matches the arm of the grand piano at the front end portion of the side plate, and an arm member of the side plate. Armboard board forming step of forming armboard boards having a shape that matches the shape of the parts, and armboard board forming step of forming armboard boards of the grand piano by attaching armboard boards to the armboard parts of the side plates. .

According to this manufacturing method, the armpiece is formed by attaching a armboard having a shape matching the armboard to the armboard formed at the front end of the side plate. Therefore, in this manufacturing method, it is only necessary to perform processing on small and light armboards instead of processing for large and heavy loading, so that the processing becomes easier and the processing cost can be reduced. In addition, since the armboard board forming step can be performed independently and in parallel with the armboard portion forming step of the side plate, the manufacturing period can be shortened. Also, for example, if the side plate is shaped into a flat state before being bent to match the outer shape of the grand piano, and the side plate arms are formed, a large-scale cutting machine such as a moulder becomes unnecessary, and the equipment cost is reduced. Can be reduced.

Further, in the manufacturing method of claim 3, the armboard board forming step includes a armboard part coating step of coating the armboard part, and the armboard board forming step includes a armboard board coating step of coating the armboard board. Are preferred.

According to this manufacturing method, the armboard portion of the side plate and the armboard board can be manufactured independently and in parallel until the coating step, and the manufacturing period can be further shortened. In particular, since the armpit board is small in size and easy to handle, it is possible to shorten the coating / drying time in the coating process. Also, since it is possible to paint with a flat armboard horizontally, it is possible to use paint with high flowability, which enables thin and even paint, and shortens the drying time. The period can be shortened. Furthermore, in this case, since a general coating technique for a flat plate such as flow coating can be used, it is possible to reduce the man-hours and the period by automation, and it is possible to further reduce the processing cost and the production period.

In the manufacturing method according to claim 3 or 4, the side plate is composed of a plurality of plates including a flat plate forming a front straight portion of the side plate, and in the step of forming the arm member, the arm member is formed at the front end of the plate. Preferably.

In this manufacturing method, the arm portion is formed on the front end portion of the flat plate forming the front straight portion of the side plate. in this case,
Since cutting and painting can be done only for small and light flat flat plates, the same advantages as in the case of the above-mentioned armboard can be obtained, compared to the case where the entire side plate is integrally molded.
It is possible to reduce the processing cost and the manufacturing period.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION A armpiece for a grand piano and a method for manufacturing the same according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 3, the arms 10 are provided at the left and right front ends of the side plate 5 of the grand piano. Side plate 5
Consists of a plurality of veneers such as lauan and plywood laminated with decorative veneers such as hippopotamus and macore. As shown in FIG. 2, the left flat plate 2 forming the straight line on the left front side and the straight line on the right front side It has a right flat plate 3 that constitutes a portion and a curved plate 4 that constitutes a curved portion on the rear side. That is, the arms 10 are provided at the front end portions of the left flat plate 2 and the right flat plate 3, respectively.

FIG. 1B shows the arm 10 on the left flat plate 2 side. The arms 10 are formed at the front end of the left flat plate 2 and have a shape according to the design of the arms 10a.
And has a shape that matches the arm member 10a of the left flat plate 2, and is configured by the arm member board 1 fixed to the arm member 10a.
The armboard 1 is made of the same plywood as the side plate 5.

Specifically, for example, as shown in FIG. 1 (a), the front end face 2d of the arm part 10a of the left flat plate 2 is
It is composed of a curved surface in the center and planes above and below it so as to constitute a part of the front end surface of 0, and the upper end surface 2e and the lower end surface 2f are composed of flat surfaces. The armboard 1 has a front end face 1d,
The upper end surface 1e and the lower end surface 1f are the arms 1 of the left flat plate 2.
It is formed so as to be flush with the corresponding surfaces of 0a, that is, the front end surface 2d, the upper end surface 2e, and the lower end surface 2f. In this case, the lower end portion and the rear end portion are hidden portions (hatched portions in FIG. 1) hidden inside the grand piano. Further, the rear end surface 1k has a projecting lower portion so as to be easily fixed with a wood screw or the like.

The arm 10 having the above structure is manufactured by the following steps.

Arm part forming step First, the arm part 10a having the above shape is formed by cutting the front end portion of the left flat plate 2 having a predetermined shape and length with a cutting machine such as a moulder. Then, after the surface finish such as attaching a decorative veneer (not shown) to the cutting surface, surface coating by flow coating (arm-arm part coating step) is performed, whereby the arm-arm part 10a is completed. This flow coating is performed using a coating machine such as a flow coater. In this case, the left flat plate 2 is placed on a conveyor or the like, and is passed through a paint curtain of paint with high flowability, and the applied paint is dried by ultraviolet rays or the like to be cured instantaneously, so that the coating process can be performed in a short time. Can finish

Armboard board forming step The armboard board 1 is formed in the same shape as the armboard portion 10a in the same manner as the left flat plate 2 and subjected to surface coating by flow coating (armboard board coating step). Create. This process is performed independently and in parallel with the arm-and-wood part forming process.

Arm brace forming step Next, as shown in FIG. 1 (b), the arm brace board 1 formed as described above is disposed on the inner side surface of the arm brace portion 10a of the left flat plate 2 so that the corresponding surfaces are mutually faced. Then, attach them with wood screws 7 or adhesive so that they become one. As a result, the left armpiece 10 composed of the armboard portion 10a of the left flat plate 2 and the armboard board 1 is completed.

On the other hand, for the right flat plate 3 as well, the right arm 10 is manufactured in the same manner. After producing both arms 10, the side plates 5 are assembled by joining the curved plates 4 so as to connect the rear end faces of the left flat plate 2 and the right flat plate 3 (see FIG. 2), and the side plates of the grand piano. 5 is attached (see FIG. 3). In this case, since the lower end portion and the rear end portion of the armboard board 1 are formed so as to be hidden inside the grand piano, the armor board 10 has no discomfort in appearance.

As described above, the arms 10 are composed of only the arms 10a of the left flat plate 2 or the right flat plate 3 of the side plate 5 and the armboard 1. Therefore, in the armpiece 10 and the manufacturing method thereof, instead of the conventional processing of integrally handling a large and heavy side plate and stacking, that is, cutting the front end face or attaching a decorative veneer, it is small and light. Armboard 1,
Since the left flat plate 2 and the right flat plate 3 may be processed separately, the processing becomes easier accordingly, thereby shortening the manufacturing period and the processing cost, and at the same time, using a large-scale cutting machine such as a moulder. Equipment for attaching a decorative veneer is no longer required, and equipment costs can be reduced.

Further, since the coating is performed before joining the respective members, the object to be coated is reduced, the time for painting and drying in the painting process can be shortened, and large-scale painting equipment is not required. Cost can be reduced.
Moreover, in this case, the armboard 1, the left flat plate 2, and the right flat plate 3
Since it can be painted horizontally, it is possible to use paint with high flowability, which enables thin and even coating, and as mentioned above, it is possible to use coating technology such as flow coating. As a result, the number of steps and the period can be shortened by automation, and further, the processing cost and the manufacturing period can be shortened. Further, by using commercially available plywood as the armboard 1, the left flat plate 2, and the right flat plate 3, the material cost can be reduced.

As described above, since the armboard board 1 is small and light and easy to handle, the armboard board 1 is not a side board such as the side board 5 which is manufactured by being divided into each member, but is integrally molded as in the conventional case. Even in the case of the side plate that is used, the armpiece can be manufactured more easily. For example, if the side plate is formed into a flat state before being bent according to the outer shape of the grand piano, and the side plate arms are formed, then the side plates 1 can be simply attached to the inside surface of the side plate. , Arms can be constructed without loading. Therefore, in this case as well,
No need to cut the front end face for large and heavy loading, shortening the manufacturing period and reducing the cost of processing and equipment.

The present invention is not limited to the embodiment described above, and can be implemented in various modes.

For example, the hatching portion of the armboard board 1 in FIG. 1 is partially omitted to make it smaller and lighter to handle, or the armboard portion 10a and the decorative veneer of the armboard board 1 are omitted to reduce the material cost. You may. Further, in the armrest 10 of FIG. 1, the armrest board 1 and the left flat plate 2 are separately coated and then assembled as the armrest 10. However, since the armrest board 1 and the left flat plate 2 are not large as members, for example, the armrest 10 After assembling,
It may be painted or a decorative veneer may be attached.

In addition, the detailed configuration and the like can be changed as appropriate without departing from the spirit of the present invention.

[0032]

As described in detail above, according to the arms of the grand piano of the present invention and the method of manufacturing the same, the arms can be easily manufactured, and the manufacturing period can be shortened, and
This has the effect of reducing the cost of processing and equipment.

[Brief description of drawings]

FIG. 1 is an explanatory view of an armpiece and a manufacturing method thereof according to an embodiment of the present invention.

FIG. 2 is a plan view of a side plate including a left flat plate used for the arms of FIG.

FIG. 3 is a perspective view of a grand piano including the arms of FIG.

FIG. 4 is an explanatory view of a conventional armrest and a manufacturing method thereof.

[Explanation of symbols]

 1 Arm Wood Board 2 Left Plate 3 Right Plate 4 Curved Plate 5 Side Plate 10 Arm Bar 10a Arm Bar

Claims (5)

[Claims] 1. A arm member formed on the front end of the side plate and having a predetermined shape that matches the arm member of the grand piano, and a shape that matches the arm member of the side plate and fixed to the arm member. Armboard of a grand piano, which is equipped with a armboard board. 2. The armboard of the grand piano according to claim 1, wherein the side plate is composed of a plurality of plates including a flat plate forming a front straight portion of the side plate. 3. An arm-joint forming step of forming a arm-joint having a predetermined shape matching the arm-joint of a grand piano, and a arm-joint board having a shape matching the arm-joint of the side plate, at the front end of the side-board. A method of producing a armpiece for a grand piano, comprising: a step of forming an armboard board; and a step of forming an armboard of the grand piano by attaching the armboard board to a front armpiece part of the side plate. 4. The arm-bark forming step has a arm-bark part coating step of coating the arm-bark part, and the arm-bark board molding step has a arm-bark board coating step of coating the arm-bark board. The method for producing a wooden frame of a grand piano according to claim 3. 5. The side plate is composed of a plurality of plates including a flat plate forming a front straight portion of the side plate, and in the step of forming the arm part, forming the arm part at the front end of the plate. The method for producing a brim of a grand piano according to claim 3 or 4, which is characterized in that.