Stand, stand assembly instructions, and keyboard instrument set

Abstract

This invention provides a stand with a simple structure that improves assembly work, a method for assembling the stand, and a keyboard instrument set equipped with the stand. [Solution] The instrument comprises a horizontal member 5, a leg portion 7 that supports the front side, which is at least one of the front and rear sides of the keyboard instrument 1, and a connecting member 6 that connects the horizontal member 5 and the leg portion 7. The leg portion 7 includes a hook-shaped locking portion, which is a locking hook 7h, at one end, and the connecting member 6 has a locking recess 11f that is a locking portion corresponding to the locking hook 7h. Therefore, the hook-shaped locking hook 7h of the leg portion 7 can be locked into the locking recess 11f of the connecting member 6, so when attaching the leg portion 7 to the connecting member 6, the leg portion 7 can be positioned and held on the connecting member 6, and the leg portion 7 can be easily attached to the connecting member 6, thus improving assembly work with a simple structure.

Description

Technical Field

[0001] The present invention relates to a stand used for a keyboard instrument, a method for assembling the stand, and a keyboard instrument set including the stand.

Background Art

[0002] For example, in the stand of a keyboard instrument, as described in Patent Document 1, connecting members are provided at both ends of a horizontal member on which the keyboard instrument is arranged, and a four-leg structure in which front legs and rear legs are provided on each of these connecting members is known.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In such a four-leg structure stand, in addition to the need to individually attach two front legs and two rear legs to each connecting member provided at both ends of the horizontal member, it is necessary to attach a pedal frame to which a pedal device is fixed to the horizontal member by a connecting member, so there is a problem that the structure is complex and the assembly work is complicated.

[0005] The problem to be solved by the present invention is to provide a stand with a simple structure that can improve the assembly work, a method for assembling the stand, and a keyboard instrument set including the stand.

Means for Solving the Problems

[0006] This invention relates to a stand comprising a horizontal member, legs supporting at least one of the front and rear of a keyboard instrument, and a connecting member connecting the horizontal member and the legs, wherein the legs include a hook-shaped locking portion at one end, and the connecting member has a locking portion corresponding to the locking portion.

[0007] Furthermore, this invention is a method for assembling a stand, comprising: a first step of assembling the pedal frame; a second step of attaching connecting members, which are attached to both sides of the horizontal member, to the pedal frame while the assembled pedal frame is lying down; and a third step of attaching the legs to the connecting members attached to the pedal frame while it is lying down. [Effects of the Invention]

[0008] This invention allows for an improved assembly process with a simple structure. [Brief explanation of the drawing]

[0009] [Figure 1] This is a perspective view showing one embodiment of the present invention applied to a keyboard instrument set. [Figure 2] Figure 1 is a front view of the keyboard instrument set shown. [Figure 3] Figure 1 is a plan view of the keyboard instrument set shown. [Figure 4] Figure 1 is a side view of the keyboard instrument set shown. [Figure 5] Figure 1 is a perspective view showing the stand for the keyboard instrument set. [Figure 6] Figure 5 is a perspective view showing the stand with the pedal frame lying down, and the connecting member of the horizontal member attached to the upper end of the pedal frame. [Figure 7] Figure 6 is an exploded perspective view showing the state in which the legs are attached to the leg mounting portion of the connecting member. [Figure 8]Figure 7 shows the state in which the legs are attached to the leg mounting portion of the connecting member shown, (a) is an exploded perspective view showing the main part, (b) is an enlarged perspective view showing the main part of the right leg, and (c) is an enlarged perspective view showing the main part of the left leg. [Figure 9] Figure 8(a) is an enlarged perspective view of the main part showing the legs positioned on the leg mounting portion of the connecting member. [Figure 10] Figure 9 is a perspective view of the main part, showing the state in which the legs are attached to the leg mounting portion of the connecting member, as seen from below. [Modes for carrying out the invention]

[0010] Hereinafter, an embodiment of this invention applied to a keyboard instrument set will be described with reference to Figures 1 to 10. As shown in Figures 1 to 4, this keyboard instrument set comprises a keyboard instrument 1 and a stand 2. The keyboard instrument 1 has a long instrument case 3 that is horizontally long. The instrument case 3 has a keyboard section 4 in which multiple white keys and multiple black keys are arranged along its long side.

[0011] As shown in Figures 1 to 5, the stand 2 comprises a rectangular cylindrical horizontal member 5 that is long in the left-right direction on which the keyboard instrument 1 is placed, two connecting members 6 provided at each end 5a on both sides of the horizontal member 5, two legs 7 attached to each of the connecting members 6 on both sides to support the front of the keyboard instrument 1, a pedal frame 8 attached to the connecting members 6 on both sides to support the rear of the keyboard instrument 1, and a pedal device 9 fixed to the pedal frame 8.

[0012] Each of the two connecting members 6, as shown in Figures 5 to 10, includes a horizontal mounting section 10 to which the left and right ends 5a of the horizontal member 5 are attached, a leg mounting section 11 to which the upper part of the leg 7 is attached, a frame mounting section 12 to which the upper end 8a of the pedal frame 8 is attached, and an instrument mounting section 13 to which the lower surface of the keyboard instrument 1 is positioned. The horizontal mounting section 10 is attached to the upper and lower surfaces and the front and rear sides by inserting the horizontal ends 5a of the horizontal member 5 from above and fastening them with multiple screws 5b (see Figures 2 and 7).

[0013] As shown in Figures 5 to 7 and Figure 10, the leg mounting portion 11 is formed in an L-shape when viewed from below. This leg mounting portion 11 has a first receiving surface 11a and a second receiving surface 11b that are perpendicular to each other and to which the leg portion 7 is attached. The first receiving surface 11a of the leg mounting portion 11 extends diagonally downward toward the outside in the longitudinal direction, which is the left-right direction of the keyboard instrument 1. The second receiving surface 11b of the leg mounting portion 11 extends diagonally downward toward the front in the front-back direction, which is the short-side direction of the keyboard instrument 1.

[0014] In this case, as shown in Figures 7 and 10, a plurality of reinforcing ribs 11c are provided along the vertical direction on the outer surface of the first receiving surface 11a, that is, the outer surface opposite to the first receiving surface 11a to which the leg portion 7 is attached. Two first mounting holes 11d are provided at the top and bottom of the first receiving surface 11a, respectively, positioned between the plurality of reinforcing ribs 11c. A second mounting hole 11e is provided approximately in the middle of the second receiving surface 11b in the vertical direction. In addition, an L-shaped reinforcing bracket 7a is attached to the upper corner of the leg portion 7 by a plurality of screws 7b, facing the mutually orthogonal first receiving surface 11a and second receiving surface 11b of the leg mounting portion 11.

[0015] As shown in FIGS. 7 and 8, this L-shaped reinforcing fitting 7a is provided with a first mounting surface 7d facing the first receiving surface 11a of the leg mounting portion 11 and a second mounting surface 7e facing the second receiving surface 11b of the leg mounting portion 11. On the first mounting surface 7d of this reinforcing fitting 7a, two upper and lower first screw holes 7f corresponding to the two first mounting holes 11d of the first receiving surface 11a of the leg mounting portion 11 are provided. Further, on the second mounting surface 7e of the reinforcing fitting 7a, a second screw hole 7g corresponding to the second mounting hole 11e of the second receiving surface 11b of the leg mounting portion 11 is provided.

[0016] As a result, as shown in FIGS. 7 and 8, when the upper reinforcing fitting 7a is arranged on the leg mounting portion 11 of the connecting member 6, the two surfaces of the first mounting surface 7d and the second mounting surface 7e of the reinforcing fitting 7a that are perpendicular to each other face the two surfaces of the first receiving surface 11a and the second receiving surface 11b of the leg mounting portion 11 that are perpendicular to each other. For this reason, the reinforcing fitting 7a is covered by the first receiving surface 11a and the second receiving surface 11b of the leg mounting portion 11 of the connecting member 6 that are perpendicular to each other and is hidden so as not to be visible from the outside. In this case, the two first screw holes 7f of the reinforcing fitting 7a correspond to the two first mounting holes 11d of the first receiving surface 11a, and the second screw hole 7g of the reinforcing fitting 7a corresponds to the second mounting hole 11e of the second receiving surface 11b.

[0017] Therefore, as shown in FIGS. 7, 8, and 10, for the leg portion 7, two screw members 15 on one side, which are fastening members, are screwed into the two first screw holes 7f of the first mounting surface 7d of the reinforcing fitting 7a through the respective first mounting holes 11d of the first receiving surface 11a, and the other screw member 15 is screwed into the second screw hole 7g of the second mounting surface 7e of the reinforcing fitting 7a through the second mounting hole 11e of the second receiving surface 11b. As a result, for the leg portion 7, the one screw member 15 and the other screw member 15 are respectively tightened to the reinforcing fitting 7a and are attached to the leg mounting portion 11 of the connecting member 6.

[0018] That is, as shown in FIGS. 5 to 8 and FIG. 10, when the two legs 7 are respectively attached to the leg attachment portions 11 of the respective connecting members 6 located on both sides of the cross member 5 by one screw member 15 and the other screw member 15, as shown in FIGS. 3 and 4, they extend obliquely downward respectively toward the outer sides on both sides in the longitudinal direction of the keyboard instrument 1 and forward in the front-rear direction which is the short side direction of the keyboard instrument 1, and are expanded to the outside and the front of the keyboard instrument 1.

[0019] Further, as shown in FIGS. 7 to 9, a locking hook 7h which is a hook-shaped locking portion is provided at the upper end portion of the first mounting surface 7d of the reinforcing metal fitting 7a. This locking hook 7h is locked to a locking recess 11f which is a locked portion provided at the upper end portion of the first receiving surface 11a of the leg attachment portion 11, and positions the leg 7 to the leg attachment portion 11. In this case, the upper end portion of the leg 7 and the upper main surface (the upper surface of the instrument mounting portion 13) of the connecting member 6 are substantially at the same height in a plan view from the side.

[0020] As shown in FIGS. 7 to 9, the locking hook 7h has a first portion 7h1 substantially parallel to the upper main surface (the upper surface of the instrument mounting portion 13) of the connecting member 6 and a second portion 7h2 substantially perpendicular to the upper main surface (the upper surface of the instrument mounting portion 13) of the connecting member 6 in a plan view from the side. The locking recess 11f has a first groove portion 11f1 corresponding to the first portion 7h1 of the locking hook 7h and a second groove portion 11f2 corresponding to the second portion 7h2 of the locking hook 7h.

[0021] In this case, as shown in Figures 6, 7, and 10, when the pedal frame 8 is positioned such that the upper main surface of the connecting member 6 is almost perpendicular to the mounting surface S, that is, when the pedal frame 8 is laid down and the leg mounting portion 11 extends diagonally upward at an inclination angle of approximately 30 degrees, and the leg portion 7 is placed on the leg mounting portion 11 of the connecting member 6 and the locking hook 7h of the reinforcing fitting 7a of the leg portion 7 is locked into the locking recess 11f of the leg mounting portion 11, the second portion 7h2 of the locking hook 7h is locked into the second groove 11f2 of the locking recess 11f by the rotational moment of the leg portion 7 acting vertically due to gravity from its center of gravity. As a result, when the leg portion 7 is placed on the leg mounting portion 11, the leg portion 7 does not fall off the leg mounting portion 11 due to its rotational moment, and the locking hook 7h is locked into the locking recess 11f, positioning and holding it on the leg mounting portion 11. Furthermore, in order to increase the force with which the second portion 7h2 is locked into the second groove 11f2 of the locking recess 11f, it is preferable that the center of gravity of the leg portion 7 be set at a location where the leg portion 7 is not in contact with the leg mounting portion 11 (first receiving surface 11a and second receiving surface 11b).

[0022] Furthermore, as shown in Figures 6, 7, and 10, the static friction force component between the leg portion 7 and the leg mounting portion 11 in the direction in which the pedal frame 8 maintains the upper main surface of the connecting member 6 almost perpendicular to the installation surface S, that is, when the pedal frame 8 is laid down and the leg mounting portion 11 extends diagonally upward at an inclination angle of approximately 30 degrees, that is, the resultant force of the static friction force component between the first mounting surface 7d and the second mounting surface 7e of the reinforcing fitting 7a of the leg portion 7 and the opposing first receiving surface 11a and second receiving surface 11b of the leg mounting portion 11, respectively, is set to be larger than the gravitational component of the leg portion 7 in the direction in which the leg mounting portion 11 extends (the component of the force acting vertically from the center of gravity of the leg portion 7).

[0023] As a result, when the leg portion 7 is placed on the leg mounting portion 11, the leg portion 7 is positioned and held on the leg mounting portion 11 by the static friction force component, without sliding down due to its gravitational component. In this embodiment, the static friction force component is adjusted by the magnitude of the force that engages the second portion 7h2 of the locking hook 7h with the second groove portion 11f2 of the locking recess 11f, and the resulting forces that are directed toward the first mounting surface 7d and the second mounting surface 7e of the leg portion 7 toward the first receiving surface 11a and the second receiving surface 11b, respectively. The static friction force component can also be adjusted by adjusting the angles of the first receiving surface 11a and the second receiving surface 11b, or by applying a coating to the surface of the leg portion 7.

[0024] In other words, as shown in Figures 6 and 7, when the leg portion 7 is placed on the leg mounting portion 11, the leg portion 7 is positioned and held on the leg mounting portion 11 by the locking hook 7h engaging with the locking recess 11f due to its rotational moment, and is also positioned and held on the leg mounting portion 11 by the static friction force component between the leg portion 7 and the leg mounting portion 11. As a result, when the leg portion 7 is placed on the leg mounting portion 11, it is held on the leg mounting portion 11 without falling off or sliding down, and is attached to the leg mounting portion 11 of the connecting member 6 by the screw member 15, which is a fastening member.

[0025] In this case, the legs 7 and connecting member 6 that support the two front points on the left and right sides of the keyboard instrument 1 are provided with indicator parts R and L, respectively, as shown in Figures 6 to 9, to indicate which is which member. Specifically, of these indicator parts R and L, indicator part R is provided on the second mounting surface 7e of the reinforcing bracket 7a on the right leg 7 and on the upper surface of the lateral mounting part 13b of the instrument mounting part 13 on the right connecting member 6. In addition, indicator part L is provided on the second mounting surface 7e of the reinforcing bracket 7a on the left leg 7 and on the upper surface of the lateral mounting part 13b of the instrument mounting part 13 on the left connecting member 6. These indicator parts R and L are covered by the leg mounting part 11 and the keyboard instrument 1 when the legs 7 are attached to the connecting member 6 and the keyboard instrument 1 is placed on the instrument mounting part 13 of the connecting member 6.

[0026] On the other hand, the frame mounting portion 12 of the connecting member 6 is equipped with a retaining bracket 12a that presses down on the upper end of the pedal frame 8, as shown in Figures 5 to 7. This retaining bracket 12a is attached to the frame mounting portion 12 by a plurality of screws 12b while the upper end 8a of the pedal frame 8 is positioned and pressed against the frame mounting portion 12. In this case, the upper end 8a of the pedal frame 8 is provided with a positioning hole 8b, and the frame mounting portion 12 is provided with a positioning pin 13d that is inserted into the positioning hole 8b. As shown in Figure 2, the pedal frame 8 consists of two rod-shaped members that extend upward in a roughly inverted trapezoidal shape from both sides in the longitudinal direction of the pedal device 9 when viewed from the front of the keyboard instrument 1. As shown in Figures 3 and 4, these pedal frames 8 are positioned behind the leg portion 7 and expand outwards to the rear side of the keyboard instrument 1.

[0027] Furthermore, as shown in Figure 2, these pedal frames 8 are formed to be sufficiently long such that the width of the keyboard instrument 1 in the longitudinal direction approaches the width of the legs 7. In other words, these pedal frames 8 are formed to be slightly shorter in length than the width of the legs 7 in the longitudinal direction of the keyboard instrument 1. In addition, anti-slip members 14 are provided at two locations on the pedal frames 8 located on both sides in the left-right direction, which is the longitudinal direction of the pedal device 9. These anti-slip members 14 are positioned in contact with the mounting surface S on which the stand 2 is installed, and prevent the stand 2 from slipping.

[0028] As shown in Figures 1 to 5, the pedal device 9 comprises a box-shaped device body 9a that is elongated in the longitudinal direction of the keyboard instrument 1, and three pedals 9b that are arranged along the longitudinal direction of the device body 9a and protrude from the front of the device body 9a. On the underside of each of these three pedals 9b, there is a projection 9c that extends forward from the device body 9a. These projections 9c are provided with an installation adjustment member (not shown) for adjusting contact with the installation surface S.

[0029] Furthermore, as shown in Figures 5 to 8, each instrument mounting portion 13 of the two connecting members 6 that mount the keyboard instrument 1 includes a front mounting portion 13a extending toward the front of the keyboard instrument 1 and a lateral mounting portion 13b extending in the lateral direction, which is the longitudinal direction of the keyboard instrument 1. Each of the two front mounting portions 13a is provided with a fixing hole 13c for screwing the lower surface of the end of the keyboard instrument 1 in the longitudinal direction. Each of the two lateral mounting portions 13b is provided with a positioning pin 13d for positioning the lower surface of the keyboard instrument 1.

[0030] Next, we will explain how to assemble such a keyboard instrument set. In this case, the stand 2 is assembled first. The method for assembling the stand 2 includes a first step of assembling the pedal frame 8, a second step of attaching the connecting members 6, which are attached to both sides of the horizontal member 5, to the pedal frame 8 while the assembled pedal frame 8 is lying down, and a third step of attaching the legs 7 to the connecting members 6 attached to the pedal frame 8 while it is lying down. In the first step, the pedal device 9 is attached to the pedal frame 8, and anti-slip members 14 are attached to both sides of the pedal frame 8 located on either side of the pedal device 9.

[0031] In the second step, the pedal frame 8 is laid flat on a mounting surface S such as the floor, with the upper ends 8a on both sides of the pedal frame 8 facing upward. That is, the pedal frame 8 maintains the upper main surface of the connecting member 6 almost perpendicular to the mounting surface S. In this state, the frame mounting portions 12 of the two connecting members 6 of the horizontal member 5 are attached to the upper ends 8a of the pedal frame 8 on both sides. In this case, the connecting members 6 are attached to the left and right ends 5a of the horizontal member 5 in advance. At this time, the ends 5a on both sides of the horizontal member 5 are fitted from above into the horizontal mounting portions 10 of the two connecting members 6, and in this state, the ends 5a on both sides of the horizontal member 5 are attached to the upper and lower surfaces and the front and rear sides of the horizontal mounting portion 10 with multiple screws 5b.

[0032] In this second step, the pedal frame 8 is laid down on a mounting surface S (see Figure 2), such as the floor, with the upper main surface of the connecting member 6 being kept almost perpendicular to the mounting surface S. The horizontal member 5 is then attached to the pedal frame 8 via the two connecting members 6. At this time, the positioning pin 13d of the frame mounting portion 12 of the connecting member 6 is inserted into the positioning hole 8b of the upper end 8a of the pedal frame 8, positioning the upper end 8a of the pedal frame 8 on the frame mounting portion 12 of the connecting member 6 and securing it with the retaining bracket 12a. In this state, the retaining bracket 12a is attached to the frame mounting portion 12 with multiple screws 12b. In this case, with the pedal frame 8 laid down on a mounting surface S such as the floor, the leg mounting portions 11 of the two connecting members 6 are positioned at an angle of approximately 30 degrees upwards.

[0033] In this second step, the legs 7 are attached to each leg mounting portion 11 of the two connecting members 6 attached to both ends of the horizontal member 5. At this time, L-shaped reinforcing brackets 7a are attached to the corners of the upper part of the legs 7 in advance using multiple screws 7b. In this case, the L-shaped reinforcing brackets 7a that have been pre-attached to the upper part of the legs 7 are positioned inside the L-shaped leg mounting portion 11 of the connecting member 6, so that the two mutually orthogonal first mounting surfaces 7d and second mounting surfaces 7e of the reinforcing bracket 7a face the two mutually orthogonal first receiving surfaces 11a and second receiving surfaces 11b of the leg mounting portion 11. In this state, the two first screw holes 7f of the reinforcing bracket 7a correspond to the two first mounting holes 11d of the first receiving surface 11a, and the second screw hole 7g of the reinforcing bracket 7a corresponds to the second mounting hole 11e of the second receiving surface 11b.

[0034] As a result, the reinforcing bracket 7a and the marking parts (R, L) are covered by the mutually orthogonal first receiving surface 11a and second receiving surface 11b of the leg mounting part 11 of the connecting member 6, and are hidden from view from the outside. At this time, the leg part 7 is positioned and held on the leg mounting part 11 with its rotational moment causing the locking hook 7h to engage with the locking recess 11f, and is also positioned and held on the leg mounting part 11 by the static friction force component between the leg part 7 and the leg mounting part 11. As a result, the leg part 7 is attached to the leg mounting part 11 of the connecting member 6 by the screw member 15, which is a fastening member, without falling off or sliding down from the leg mounting part 11.

[0035] In this case, the two screw members 15) that are fastening members are screwed into the two first screw holes 7f provided in the first mounting surface 7d of the reinforcing bracket 7a through the first mounting holes 11d of the first receiving surface 11a, and the other screw member 15 is screwed into the second screw hole 7g through the second mounting hole 11e of the second receiving surface 11b. When one screw member 15 and the other screw member 15 are tightened in this state, the leg portion 7 is attached to the leg mounting portion 11 of the connecting member 6. In this way, the stand 2 that supports the front and rear of the keyboard instrument 1 is assembled by these two leg portions 7 and the pedal frame 8.

[0036] In this state, the stand 2 is erected on a mounting surface S such as the floor by the two legs 7 and the pedal frame 8, and in this state, both sides of the lower surface of the keyboard instrument 1 in the left-right direction, which is the longitudinal direction, are placed on the instrument mounting parts 13 provided on the two connecting members 6 of the stand 2. At this time, the lower surfaces of both sides of the keyboard instrument 1 in the left-right direction are positioned by the positioning pins 13d provided on the lateral mounting parts 13b of the two instrument mounting parts 13. In this state, when screw members (not shown) are screwed into the lower surface of the keyboard instrument 1 from below through the fixing holes 13c of the two front mounting parts 13a, the keyboard instrument 1 is attached to the stand 2.

[0037] In this state, the contact state of the pedal device 9 with the mounting surface S is adjusted by the mounting adjustment member (not shown) of the pedal device 9. This assembles the keyboard instrument set. In this state, as shown in Figures 3 and 4, the two legs 7 extend diagonally downward on both sides in the longitudinal direction of the keyboard instrument 1 and forward in the front-to-back direction, which is the short direction of the keyboard instrument 1, and expand outwards and forwards of the keyboard instrument 1. As a result, the two legs 7 expand diagonally forwards of the keyboard instrument 1, securely supporting the front of the keyboard instrument 1 in a stable state. At this time, the two pedal frames 8 are positioned behind each leg 7 and expand toward the rear of the keyboard instrument 1, securely supporting the rear of the keyboard instrument 1 in a stable state.

[0038] Thus, the stand 2 of this keyboard instrument set comprises a horizontal member 5, a leg 7 that supports the front of the keyboard instrument 1 (at least one of the front and rear sides), and a connecting member 6 that connects the horizontal member 5 and the leg 7. The leg 7 includes a hook-shaped locking portion, a locking hook 7h, at one end, and the connecting member 6 has a locking recess 11f that is a locking portion corresponding to the locking hook 7h. This allows for a simple structure and improved assembly work.

[0039] In other words, in the stand 2 of this keyboard instrument set, the hook-shaped locking hook 7h of the leg portion 7 can be locked into the locking recess 11f of the connecting member 6. Therefore, when attaching the leg portion 7 to the connecting member 6, the leg portion 7 can be positioned and held in place on the connecting member 6. This makes it easy to attach the leg portion 7 to the connecting member 6, thus improving assembly work with a simple structure.

[0040] Furthermore, in the stand 2 of this keyboard instrument set, one end of the leg portion 7 has a plane that is substantially parallel to the upper surface of the instrument mounting portion 13 of the connecting member 6, which is the mounting surface for the keyboard instrument 1. The locking hook 7h, which is the locking portion, is positioned at a level below the plane that is substantially parallel to the upper surface of the instrument mounting portion 13 of the connecting member 6, which is the mounting surface for the keyboard instrument 1, when viewed from the side. This prevents the locking hook 7h from getting in the way when the keyboard instrument 1 is placed on the upper surface of the instrument mounting portion 13, and also increases the mounting area of ​​the keyboard instrument 1, thereby allowing the keyboard instrument 1 to be placed in a stable position.

[0041] Furthermore, in the stand 2 of this keyboard instrument set, one end of the leg portion 7 and the upper main surface of the connecting member 6 are at approximately the same height when viewed from the side in plan view. The hook-shaped locking hook 7h has a first portion 7h1 that is approximately parallel to the upper main surface of the connecting member 6 and a second portion 7h2 that is approximately perpendicular to the upper main surface of the connecting member 6 when viewed from the side in plan view. The locking recess 11f has a first groove 11f1 corresponding to the first portion 7h1 and a second groove 11f2 corresponding to the second portion 7h2. As a result, the locking hook 7h can be securely and effectively locked into the locking recess 11f of the connecting member 6 without the locking hook 7h protruding upward from the upper main surface of the connecting member 6, and without the leg portion 7 and the locking hook 7h shifting from side to side.

[0042] Furthermore, in the stand 2 of this keyboard instrument set, the leg portion 7 is diagonally extended forward, which is at least one of the front and rear of the keyboard instrument 1 when viewed from above, and the connecting member 6 is provided with a leg mounting portion 11 that supports one end of the leg portion 7, and the leg portion 7 is positioned by the locking hook 7h and the leg mounting portion 11, so that the leg portion 7 can be positioned by the locking hook 7h and the leg mounting portion 11 with the leg portion 7 diagonally extended forward of the keyboard instrument 1, thereby allowing the leg portion 7 to be attached to the leg mounting portion 11 accurately and well.

[0043] In this case, the stand 2 of this keyboard instrument set includes a leg 7 that supports the front, which is at least one of the front and rear of the keyboard instrument 1, and a pedal frame 8 that supports the rear, which is at least the other of the front and rear of the keyboard instrument 1. When the pedal frame 8 is in a state in which the upper main surface of the connecting member 6 is kept almost perpendicular to the installation surface S, that is, when the pedal frame 8 is laid down, the static friction force component between the leg 7 in the direction in which the leg mounting portion 11 extends and the leg mounting portion 11 is greater than the gravitational force component of the leg 7 in the direction in which the leg mounting portion 11 extends. As a result, even if the leg mounting portion 11 is inclined at an angle, the leg 7 can be held in place on the leg mounting portion 11 by the static friction force component so that the leg 7 does not slip off the leg mounting portion 11 when the leg 7 is placed on the leg mounting portion 11. Therefore, by simply placing the leg portion 7 on the leg mounting portion 11, it is possible to prevent it from falling off. In conventional designs, the leg portion 7 would slip and it would be difficult to properly fasten the screws, but with this invention, it is easy to fasten the screws on the leg portion 7. In addition, the leg portion 7 is generally heavy and conventional designs were difficult for one person to assemble, but with this invention, one person can easily assemble it.

[0044] Furthermore, the stand 2 of this keyboard instrument set includes a leg 7 that supports the front of the keyboard instrument 1, which is at least one of the front and rear of the keyboard instrument 1, and a pedal frame 8 that supports the rear of the keyboard instrument 1, which is at least the other of the front and rear of the keyboard instrument 1. When the pedal frame 8 is in a state where the upper main surface of the connecting member 6 is kept almost perpendicular to the installation surface S, that is, when the pedal frame 8 is laid down, the locking hook 7h of the leg 7 is locked into the locking recess 11f of the connecting member 6 by the rotational moment of the leg 7 with respect to the center of gravity of the leg 7. As a result, even if the leg mounting part 11 is tilted at an angle, when the leg 7 is placed on the leg mounting part 11, the leg 7 is held securely in place by the locking hook 7h of the locking recess 11f, so that the leg 7 does not fall off the leg mounting part 11 due to the rotational moment of the leg 7.

[0045] Furthermore, in the stand 2 of this keyboard instrument set, the legs 7 support the keyboard instrument 1 at two points on the left and right sides of the front, which is at least one of the front and rear of the keyboard instrument 1. Each of the legs 7 is provided with an indicator part R and an indicator part L to indicate whether it is the left or right member. When the legs 7 are attached to the connecting member 6, the indicator parts R and L are covered by the leg mounting part 11. This allows the right and left legs 7 to be distinguished by the indicator parts R and L, even if the shapes of the right and left legs 7 are different, thereby preventing installation errors of the legs 7. In addition, the indicator parts R and L can be covered by the leg mounting part 11 after the legs 7 are attached, thus enhancing the design.

[0046] Furthermore, the assembly method of this stand 2 includes a first step of assembling the pedal frame 8, a second step of attaching the connecting members 6, which are attached to both sides of the horizontal member 5, to the pedal frame 8 while the assembled pedal frame 8 is lying down, that is, while the pedal frame 8 maintains the upper main surface of the connecting member 6 almost perpendicular to the installation surface S, and a third step of attaching the legs 7 to the connecting members 6 attached to the pedal frame 8 in the lying-down position. As such, it is possible to improve the assembly work with a simple structure.

[0047] In other words, in this assembly method for stand 2, in the second step, the connecting member 6 of the horizontal member 5 is attached to the pedal frame 8 while the pedal frame 8 is lying down, so the connecting member 6 can be easily and quickly attached to the pedal frame 8 by one worker, thereby improving assembly efficiency. Furthermore, in the third step, the legs 7 are attached to the connecting member 6, so the legs 7 can be easily and quickly attached to the connecting member 6 by one worker, thereby improving assembly efficiency.

[0048] In this case, the assembly method of the stand 2 involves attaching the leg portion 7 to the connecting member 6 while the hook-shaped locking hook 7h provided at one end of the leg portion 7 is locked into the locking recess 11f provided in the connecting member 6 during the third step. This allows the leg portion 7 to be positioned and held on the connecting member 6 by locking the locking hook 7h of the leg portion 7 into the locking recess 11f of the connecting member 6. Since the leg portion 7 is attached to the connecting member 6 in this state, one worker can easily and quickly attach the leg portion 7 to the connecting member 6, thereby improving the efficiency of the assembly process.

[0049] In the embodiments described above, the pedal frame 8 is formed in a substantially inverted trapezoidal shape. However, this invention is not limited to this, and it may be formed in other shapes such as a square or rectangular shape.

[0050] Furthermore, although the above-described embodiment described a case in which the pedal frame 8 is formed by two rod-shaped members, the invention is not limited to this, and the pedal frame may also be formed by plate-shaped members. [Explanation of Symbols]

[0051] 1 Keyboard instrument, 2 Stand, 3 Instrument case, 4 Keyboard section, 5 Horizontal frame member, 5a End section, 5b Screw, 6 Connecting member, 7 Leg section, 7a Reinforcement fitting, 7b Screw, 7d First mounting surface, 7e Second mounting surface, 7f First screw hole, 7g Second screw hole, 7h Locking hook, 7h1 First part, 7h2 Second part, 8 Pedal frame, 9 Pedal device, 9a Device body, 9b Pedal, 9c Projection, 10 Horizontal frame mounting section, 11 Leg mounting section, 11a First receiving surface, 11b Second receiving surface, 11c Reinforcement rib, 11d First mounting hole, 11e Second mounting hole, 11f Locking recess, 11f1 First groove, 11f2 Second groove, 12 Frame mounting section, 12a Retaining bracket, 12b Screw, 13 Instrument mounting section, 13a Front mounting section, 13b Side mounting section, 13c Fixing hole, 13d Positioning pin, 14 Anti-slip member, 15 Screw member

Claims

1. Horizontal members and Legs supporting at least one of the front and rear of the keyboard instrument, It comprises a connecting member that connects the horizontal member and the leg portion, The leg portion includes a hook-shaped locking portion at one end, The connecting member has a locking portion that corresponds to the hook-shaped locking portion, stand.

2. The one end of the leg has a plane that is substantially parallel to the surface on which the keyboard instrument is placed. The locking portion is provided in a position at or below a plane substantially parallel to the aforementioned mounting surface when viewed from the side. The stand according to claim 1.

3. The one end of the leg and the upper main surface of the connecting member are at approximately the same height when viewed from the side in a plan view. The hook-shaped locking portion has, in a plan view from the side, a first portion that is substantially parallel to the upper main surface of the connecting member, and a second portion that is substantially perpendicular to the upper main surface of the connecting member. The locking portion has a first groove corresponding to the first portion and a second groove corresponding to the second portion. The stand according to claim 2.

4. The aforementioned legs are obliquely extended toward at least one of the front and rear of the keyboard instrument when viewed from above. The connecting member includes a leg support portion that supports one end of the leg portion, The leg portion is positioned by the locking portion and the leg support portion. The stand according to claim 1.

5. The keyboard instrument comprises legs that support at least one of the front and rear of the keyboard instrument, and a pedal frame that supports at least the other of the front and rear of the keyboard instrument, In a state in which the pedal frame maintains the upper main surface of the connecting member substantially perpendicular to the stand mounting surface, the static friction force component between the leg and the leg support in the direction in which the leg support extends is greater than the gravitational force component of the leg in the direction in which the leg support extends. The stand according to claim 4.

6. The keyboard instrument comprises legs that support at least one of the front and rear of the keyboard instrument, and a pedal frame that supports at least the other of the front and rear of the keyboard instrument, In a state in which the pedal frame maintains the upper main surface of the connecting member substantially perpendicular to the stand mounting surface, the locking portion of the leg is engaged with the locked portion of the connecting member by a rotational moment of the leg acting vertically from the center of gravity of the leg. The stand according to claim 4.

7. The legs support the keyboard instrument at two locations, on the left and right sides, at least one of the front and rear of the keyboard instrument. Each of the aforementioned legs is provided with an indicator to show whether it is the left or right member. The sign portion is covered by the leg support portion when the leg portion is attached to the connecting member. The stand according to claim 4.

8. The first step is to assemble the pedal frame, With the assembled pedal frame lying down, the second step is to attach the connecting members, which are attached to both sides of the horizontal member, to the pedal frame. A third step involves attaching the leg portion to the connecting member that is attached to the pedal frame in the aforementioned lying-down position, How to assemble a stand equipped with this feature.

9. In the third step described above, the leg is attached to the connecting member with the hook-shaped locking portion provided at one end of the leg locked to the locking portion provided on the connecting member. The method for assembling the stand according to claim 8.

10. A keyboard instrument set equipped with the stand described in claim 1.

Images