JPH08202345A - Backpost coupling structure and coupling method of keyboard musical instrument - Google Patents

Abstract

PURPOSE: To provide a backpost coupling structure and coupling method of a keyboard musical instrument capable of easily making a coupling operation without requiring intricate working of high accuracy. CONSTITUTION: The coupling member 6 itself is coupled to a tone unit 4 from a backpost 2 side by a wood screws 14, there is no need for forming holes to allow the wood screws to arrive at the backpost 2 from the opposite side. Further, the coupling member 6 is merely fixed by screwing the wood screws 14 from the coupling member 6 side to the prescribed position of the unit 4 and, therefore, there is no need for forming a tenon, etc., to the unit 4 and positioning the coupling member 6 in a manner as to prevent the deviation thereof. There is, therefore, no need for executing the intricate working of high accuracy. The coupling of the coupling member 6 to the unit 4 is possible by the screwing operation of the wood screws 14 from the backpost 2 side and further, the coupling of the backpost 2 to the coupling member 6 involves mere fixing of the front end of the backpost 2 to the coupling member 6 by means of a bolt 20 and, therefore, the coupling operation suffices with the operation of only the one side of the unit 4 and the assembly operation is efficient.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strut connecting structure and a connecting method for a keyboard instrument.

[0002]

2. Description of the Related Art Conventionally, a keyboard instrument, such as a piano, is provided with a support column together with a frame for supporting the tension of strings and holding the case. Also, by supporting and fixing the soundboard, which is the heart of the piano, with a sturdy support, a rich sound can be obtained from the soundboard.

Therefore, it is necessary that the coupling structure between this column and other constituent members (including other columns) is strong in order to sufficiently bring out the above-mentioned effects. As this strut connecting structure, a connecting structure such as a hoso set shown in FIG. 7A or an ant set shown in FIG. 7B is known.

[0004]

However, in the former hoso set, in order to connect the support columns 100, other component members 200 (in the example of FIG. 7 are piled up) when the wood screw is screwed in. It is necessary to form the mortise 202 by the grooving operation in order to position the stanchion at the predetermined position so that the tip of the stanchion does not shift. In addition, the wood screw 20 screwed from the opposite side of the groove 202
So that 4,206 reaches the column 100, wood screws 20
The holes 208 and 210 must be opened by the number of 4,206. For this reason, the manufacturing cost tends to increase due to the troublesome work and the drilling work. Further, even during the assembling work, the work of joining the other constituent members 200 from the front and back sides is not performed, and the workability at the time of assembling cannot be said to be efficient. Furthermore, the hoso 202 and the hole 20 on the back side thereof.
Because of 8, 210, the strength of the other component 200 itself may be reduced.

The latter dovetail set requires complicated and highly accurate machining as shown in FIG. 7 (b) for the other end of the support column 300 and the other constituent member 400 into which the end is fitted, and the manufacturing cost is also high. Tended to be higher. SUMMARY OF THE INVENTION It is an object of the present invention to provide a strut connecting structure and a connecting method for a keyboard instrument, which can be easily connected without requiring complicated and highly accurate processing.

[0006]

According to the first aspect of the present invention,
It is a connecting structure of a strut of a keyboard instrument and other components,
The mounting base of the coupling member is coupled to the coupling part of the other component with a wood screw inserted through the wood screw insertion hole of the mounting base and screwed into the coupling part of the other component. Along with both sides of the above-mentioned mounting base, stand up opposite to each other 2
A strut connection structure for a keyboard instrument, in which one strut of the keyboard instrument is coupled to other components by bolting one sandwiching piece to one end of a strut inserted between the two sandwiching pieces. is there.

The invention according to claim 2 is the strut connecting structure for a keyboard instrument according to claim 1, wherein the keyboard instrument is a piano, and the other component is a hoist, a frame or another strut. According to a third aspect of the present invention, in a strut connecting method for connecting a strut of a keyboard instrument to another component, a mounting base having wood screw insertion holes and two sandwiching pieces that stand upright on opposite sides of the mounting base. Using a coupling member having, by screwing a wood screw through the wood screw insertion hole of the mounting base of the connection member to the coupling site of the other component,
The coupling member is coupled to the other component member, one end of the column is inserted between the two clamping pieces of the coupling member, and one end of the column and the two clamping pieces are pierced together by bolts. In this method, the column of the keyboard instrument is coupled to the other components by bolting and fixing one end of the column and the coupling member to each other.

According to a fourth aspect of the present invention, there is provided a strut connecting method for a keyboard instrument according to the third aspect, wherein the keyboard instrument is a piano, and the other component is a hoist, a frame or another strut.

[0009]

According to the strut coupling structure of the keyboard instrument of the first aspect, the strut is connected to the strut by using a coupling member having a mounting base and two sandwiching pieces which stand upright on opposite sides of the mounting base. It is connected to other components (including other columns). The mounting base is connected to the coupling part of the other component by a wood screw that is inserted into the wood screw insertion hole of the mounting base and screwed into the coupling part of the other component, and the two clamping pieces are , Is bolted to one end of a column inserted between the two holding pieces.

As a result, since the connecting member itself is connected to the other constituent member from the strut side by the wood screw, a hole for allowing the wooden screw to reach the strut from the opposite side is provided to the other constituent member. No need to provide. Further, the joining member can be joined to other components by a wood screw screwing operation from the column side, and the work is easy. Further, since the connecting member is simply fixed at a predetermined position by screwing a wood screw from the side of the connecting member, it is not necessary to form a groove or the like to position the connecting member so as not to shift. For this reason, it is not necessary to perform complicated and highly accurate processing. In addition, since it is not necessary to make a hole in the mortise or the back side as described above, the strength of other constituent members is maintained.

Furthermore, since the strut is joined to the joining member only by fixing the tip of the strut to the joining member by bolting, the work on the strut side is sufficient. Therefore, the connecting work only needs to be performed on one side of the other components, and the assembling work is efficient. In order to insert the bolts, there is an insertion hole at the tip of the strut at a right angle to the axial direction of the strut, but the insertion hole is inside the strut, and a groove is formed on the surface like a mortar. However, since the periphery of the insertion hole is bolted together with the connecting member, the strength may be substantially maintained, or the strength may be improved due to the connecting member. Moreover, since the struts are simply bolted, the connecting work is easy.

The strut coupling structure of the keyboard instrument is, for example,
It is realized as follows. First, a coupling member having a mounting base portion having a wood screw insertion hole and two sandwiching pieces standing upright on opposite sides of the mounting base portion is used, and the wood screw insertion hole of the mounting base portion of the coupling member is inserted. By screwing a wood screw into the coupling part of the other component to couple the coupling member to the other component, and then to attach one end of the column to the two clamping pieces of the coupling member. Insert in between,
One end of the strut and the two sandwiching pieces are penetrated by bolts and bolted to fix the one end of the strut and the coupling member, so that the strut of the keyboard instrument is replaced with the other constituent member. It is done by combining.

In the above-described strut connecting structure and connecting method for a keyboard instrument, for example, the keyboard instrument is a piano,
Other components are hoisting, stiles or other columns.

[0014]

【Example】

[Embodiment 1] FIGS. 1 and 2 (A-A sectional view of FIG. 1)
FIG. 3 shows a strut coupling structure of a grand piano as an embodiment of the present invention. This connection structure shows a connection structure between the support column 2 and the loading 4. A coupling member 6 is interposed between the column 2 and the stack 4. The coupling member 6 includes a mounting base portion 8 and two sandwiching pieces 1 which are vertically opposed to each other on both sides of the mounting base portion 8 and face each other.
It is provided with 0 and 12, and has a substantially U shape.

Four wood screws 14 are screwed into the stack 4 through the four wood screw insertion holes 8a of the mounting base 8. As a result, the connecting member 6 is connected to the stack 4. One end of the column 2 is inserted between the two holding pieces 10 and 12. Two bolt insertion holes 1 are provided at one end of the column 2.
6 are provided, and the clamping pieces 10 and 12 are also provided with two bolt insertion holes 18 each. When the pillar 2 is inserted between the sandwiching pieces 10 and 12 to a position where it is substantially in contact with the mounting base 8, the bolt insertion hole 16 and the bolt insertion hole 18 are arranged so as to substantially overlap with each other. In this manner, with the bolt insertion hole 16 and the bolt insertion hole 18 overlapping, the two bolts 20 are moved from the one holding piece 10 side to the other holding piece 12 side, and the bolt insertion hole 16 and the bolt insertion hole 18 are provided.
And the other holding member 12 side are screwed into the nuts 22, respectively, so that the support column 2 and the connecting member 6 are bolted and fixed.

By having such a structure,
The column 2 is connected to the loading 4 via a connecting member 6. The procedure for assembling such a coupling structure is as follows. First, the coupling member 6 is brought into contact with a predetermined coupling position of the stack 4, and the wood screw insertion hole 8a of the attachment base 8 of the coupling member 6 is inserted to screw the wood screw 14 into the stack 4. As a result, the connecting member 6 is connected to the stack 4 as shown in FIG. Next, one end of the pillar 2 is inserted between the two holding pieces 10 and 12 of the coupling member 6, and the bolt insertion hole 16 of the pillar 2 and the holding piece 1 are inserted.
The bolt insertion holes 18 of 0 and 12 are overlapped. The bolt 20 is inserted through the bolt insertion hole 16 and the bolt insertion hole 18, and the nut 22 is tightened. As a result, the column 2 and the loading 4 are connected.

In the present embodiment, as described above, since the connecting member 6 itself is connected to the loading 4 which is another constituent member by the wood screw 14 from the column 2 side, it is particularly opposed to the loading 4. There is no need to provide a hole for the wood screw to reach the support 2 from the side. Further, since the coupling member 6 can be coupled to the loading 4 by screwing the wood screw 14 from the support 2 side, the operation is easy. Further, since the joining member 6 is simply fixed to the predetermined position of the loading 4 by inserting the wood screw 14 from the joining member 6 side, a hoso or the like is formed on the loading 4 and the joining member 6 is formed.
It is not necessary to position it so that it does not shift. For this reason, it is not necessary to perform complicated and highly accurate processing. Also, since there is no need to make a hole in the back and its back side,
The strength of loading 4 is maintained.

Furthermore, since the column 2 is coupled to the coupling member 6 only by fixing the tip of the column 2 to the coupling member 6 with the bolt 20, the work on the column 2 side is also sufficient.
Therefore, the coupling work is required only on one side of the loading / unloading 4, and the assembling work is efficient. In order to insert the bolt 20, a bolt insertion hole 16 is provided at the tip of the support column 2 at a right angle to the axial direction of the support column 2, but the bolt insertion hole 16 is inside the support column 2 and can As described above, the groove is not formed on the surface, and the periphery of the bolt insertion hole 16 is bolted together with the connecting member 6, so that the strength is substantially maintained or, conversely, because of the connecting member 6, the strength is maintained. May improve. Further, since the support columns 2 are simply bolted, the connecting work is easy.

A side plate as a decorative plate is attached to the outside of the stack 4 at an appropriate timing thereafter. [Embodiment 2] FIG. 4 (a sectional view taken along line BB in FIG. 5) and FIG. 5 show a connecting structure of the columns 32 and 34. The coupling member 36 includes a mounting base portion 38 and two sandwiching pieces 40 and 42 that are vertically opposed to each other on both sides of the mounting base portion 38 and are substantially U-shaped. Although it differs from the first embodiment in that the mounting base 38 has two wood screw insertion holes 38a,
Others are the same in shape except for the difference in size.

Two wood screw insertion holes 38a of the mounting base 38
The two wood screws 44 are screwed into the support column 34 by inserting. As a result, the connecting member 36 is connected to the column 34. The support 32 is provided between the two holding pieces 40, 42.
One end of is inserted. Two bolt insertion holes 46 are provided at one end of the support column 32, and each of the holding pieces 40 and 42 has two bolt insertion holes 46.
One bolt insertion hole 48 is provided. Clamping pieces 40, 42 up to a position where the column 32 almost abuts the mounting base 38.
The bolt insertion hole 46 and the bolt insertion hole 48 are arranged so as to substantially overlap each other when they are inserted between the two.
In this way, with the bolt insertion hole 46 and the bolt insertion hole 48 overlapping, the two bolts 50 are attached to the one holding piece 40.
From the side to the other holding piece 42 side, the bolt insertion hole 46 and the bolt insertion hole 48 are penetrated, and the nuts 52 are respectively screwed into the other holding piece 42 side, so that the pillar 3
2 and the connecting member 36 are bolted.

By having such a structure,
The column 32 is coupled to the other column 34 via a coupling member 36. The procedure for assembling such a coupling structure is as follows. First, the coupling member 36 is brought into contact with a predetermined coupling position of the support column 34, the two wood screw insertion holes 38a of the mounting base 38 of the coupling member 36 are inserted, and the two wood screws 44 are attached to the support column 34.
Screw into. As a result, the connecting member 36 is attached to the support 34
Bind to. Next, one end of the support column 32 is inserted between the two holding pieces 40, 42 of the coupling member 36, and the bolt insertion hole 46 of the support column 32 and the bolt insertion hole 48 of the holding pieces 40, 42 are inserted.
And. The bolt insertion hole 46 and the bolt insertion hole 48
Insert the bolt 50 into each of and and tighten with the nut 52. This connects the columns 32 and 34.

In this embodiment, as described above, the connecting member 36 is used.
Since itself is connected to the other strut 34, which is another component member, from one strut 32 side by a wood screw 44, the other strut 34 is particularly tied to the other strut 34 by a wood screw from the opposite side.
There is no need to provide a hole to reach the. Further, since the coupling member 36 can be coupled to the other column 34 by screwing the wood screw 44 from the one column 32 side,
Easy to work. In addition, the connecting member 36 is simply placed at a predetermined position on the other column 34 from the side of the connecting member 36 to the wood screw 44.
Since it is only fixed by screwing in, it is not necessary to form a mortar or the like on the other column 34 and to position the coupling member 36 so as not to shift. For this reason, it is not necessary to perform complicated and highly accurate processing. Further, since it is not necessary to make a hole in the mortise or the back side as described above, the strength of the other column 34 is maintained.

Furthermore, since the support column 32 is connected to the connecting member 36 only by fixing the tip of the support column 32 to the connecting member 36 with the bolt 50, the operation on the support column 32 side is also sufficient. Therefore, the connecting work only needs to be performed on one side of the column 34, and the assembling work is efficient. Bolt 50
In order to insert the through hole, two bolt insertion holes 46 are provided at the tip of the support column 32 substantially at right angles to the axial direction of the support column 32. The bolt insertion hole 46 is inside the support column 32.
Since a groove is not formed on the surface like a groove and the periphery of the bolt insertion hole 46 is bolted together with the connecting member 36, the strength is substantially maintained or the strength of the connecting member 36 is reduced. On the contrary, the strength may be improved.
Further, since the columns 32 are simply bolted, the connecting work is easy.

[Embodiment 3] FIG. 6 shows a connecting structure of the support column 62 and the frame 64. The coupling member 66 includes a mounting base portion 68 and two sandwiching pieces 70 and 72 that stand on opposite sides of the mounting base portion 68 and face each other, and have a deformed substantially U-shape. The difference from the second embodiment is that the two sandwiching pieces 70 and 72 rise not obliquely but vertically from the attachment base 68. Further, the two wood screw insertion holes 68a of the mounting base 68 are arranged so as to be biased toward the one holding piece 72 side so that a tool such as a driver can be easily inserted from between the holding pieces 70, 72. Is also different.

Two wood screw insertion holes 6 of the mounting base 68.
A wooden screw 74 is screwed into the frame 64 through the 8a.
As a result, the connecting member 66 is connected to the frame 64. One end of the support column 62 is inserted between the two holding pieces 70, 72. Two bolt insertion holes 76 are provided at one end of the support column 62, and two bolt insertion holes 78 are also provided in each of the sandwiching pieces 70 and 72. When the pillar 62 having the tip end surface formed obliquely is inserted between the sandwiching pieces 70 and 72 to a position where the tip end surface substantially abuts the mounting base 68, the bolt insertion hole 76 and the bolt insertion hole 78 are formed. Is
They are arranged so that they almost overlap. In this way, when the bolt insertion hole 76 and the bolt insertion hole 78 overlap each other, 2
One bolt 80 penetrates the bolt insertion hole 76 and the bolt insertion hole 78 from the one holding piece 70 side to the other holding piece 72 side, and the nuts 82 are respectively screwed into the other holding piece 72 side. As a result, the support column 62 and the connecting member 66 are bolted together.

By having such a structure,
The support column 62 is connected to the frame 64 via a connecting member 66. The procedure for assembling such a coupling structure is as follows. First, the connecting member 66 is brought into contact with a predetermined connecting position of the frame 64, and the wood screw insertion holes 6 of the mounting base 68 of the connecting member 66 are inserted.
8a is inserted and two wood screws 74 are screwed into the frame 64.
As a result, the connecting member 66 is connected to the frame 64. Next, one end of the column 62 is connected to the two holding pieces 7 of the coupling member 66.
It is inserted between 0 and 72, and the bolt insertion hole 76 of the column 62 is inserted.
And the bolt insertion hole 78 of the clamping pieces 70 and 72 are overlapped. Two bolts 80 are inserted into the bolt insertion hole 76 and the bolt insertion hole 78, and each nut 82 is tightened. As a result, the column 62 and the frame 64 are joined together.

In this embodiment, as described above, the connecting member 66 is used.
Since it is itself connected to the frame 64 which is another component from the side of one of the columns 62 by the two wood screws 74, it is particularly necessary for the frame 64 to reach the column 62 from the other side. There is no need to make holes. Further, the coupling member 66 can be coupled to the frame 64 by screwing the wood screw 74 from the support column 62 side, which facilitates the work. In addition, since the connecting member 66 is simply fixed to the predetermined position by screwing the wood screw 74 from the side of the connecting member 66, a mortise or the like is formed on the frame 64 so that the connecting member 66 is positioned so as not to shift. do not have to. For this reason, it is not necessary to perform complicated and highly accurate processing. Further, since it is not necessary to make a hole in the frame 64 on the mortise or the back side thereof, the strength of the frame 64 is maintained.

Further, the support rod 62 is connected to the connecting member 66 only by fixing the tip end of the support rod 62 to the connecting member 66 with the two bolts 80, and therefore the work on the support column 62 side is also required. Therefore, the joining work is required only on one side of the frame 64, and the assembling work is efficient. In order to insert the bolt 80, at the tip of the pillar 62, the pillar 62
Although two bolt insertion holes 76 are provided substantially at right angles to the axial direction of the above, the bolt insertion holes 76 are inside the column 62, and a groove is not formed on the surface like a mortar or the like.
Further, since the periphery of the bolt insertion hole 76 is bolted together with the connecting member 66, the strength is almost maintained, or the strength may be improved due to the connecting member 66. Further, since the support column 62 is simply bolted, the connecting work is easy.

Further, since the sandwiching pieces 70 and 72 are not vertical but are inclined, the support column 62 can be obliquely attached to other constituent members. [Others] In each of the embodiments, the support 2 and the loading 4 are connected, the support 32 and the support 34 are connected, or the support 6 is used.
Although the connection between 2 and the frame 64 is mentioned, any connection structure or connection method of connection between columns and loading, connection between columns and columns, or connection between columns and frames may be used, respectively. .

In the above embodiment, the coupling structure for the grand piano is shown, but it may be an upright piano. Other keyboard instruments may also be used. Further, in each of the embodiments, since a strong connection is formed and the rigidity of the entire strut system is increased, the fixed end of the soundboard of the piano becomes solid, and the acoustic effect especially in the bass portion is improved. Further, if the same effect is obtained, the material may be thin, which leads to cost reduction.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a strut coupling structure for a piano according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is an explanatory diagram of a column mounting operation.

FIG. 4 is a cross-sectional view of a strut coupling structure for a piano according to a second embodiment and is a cross-sectional view taken along the line BB in FIG.

FIG. 5 is a cross-sectional view of a strut coupling structure for a piano according to a second embodiment.

FIG. 6 is a cross-sectional view of a pillar support structure for a piano according to a third embodiment.

FIG. 7 is a cross-sectional view of a conventional strut coupling structure for a piano.

[Explanation of symbols]

2, 32, 34, 62 ... Struts 4 ... Loading 6, 36, 66 ... Coupling members 8, 38, 68 ... Mounting bases 8a, 38a, 68a ... Wood screw insertion holes 10, 12, 40, 42, 70, 72 … Clamping piece 14,44,74… Wood screw 16,18,46,48,76,78… Bolt insertion hole 20,50,80… Bolt 22,52,82… Nut 64… Stile

Claims (4)

[Claims] 1. A connecting structure for a strut of a keyboard instrument and other constituent members, wherein a mounting base portion of the connecting member is inserted through a wood screw insertion hole of the mounting base portion to a connecting portion of the other constituent member. With a wood screw that is screwed in, it is connected to the connecting portion of the above-mentioned other component member, and stands up on opposite sides of the mounting base portion 2 facing each other.
A strut connecting structure for a keyboard instrument, in which one strut is clamped to one end of a strut inserted between the two striking pieces so that the strut of the keyboard instrument is coupled to other components. 2. The strut coupling structure for a keyboard instrument according to claim 1, wherein the keyboard instrument is a piano, and the other component is a hoist, a frame or another strut. 3. A strut joining method for joining a strut of a keyboard instrument to another component, comprising a mounting base having a wood screw insertion hole, and two sandwiching pieces standing upright on opposite sides of the mounting base. A coupling member is used to couple the coupling member with the other component by inserting the wood screw through hole of the attachment base of the coupling member and screwing the wood screw into the coupling portion of the other component. Then, one end of the pillar is inserted between the two holding pieces of the coupling member, and one end of the pillar and the two holding pieces are passed through with a bolt to be bolted to the one end of the pillar. A method of connecting a strut of a keyboard instrument to a strut of the keyboard instrument by fixing the strut of the keyboard instrument to the other component by fixing the joining member. 4. The method of connecting a strut of a keyboard instrument according to claim 3, wherein the keyboard instrument is a piano, and the other component is a hoist, a frame or another strut.