Upright piano

Abstract

To provide an upright piano that reduces the complexity of the work involved in switching the lid between the closed and open positions. [Solution] An upright piano according to one aspect of the present disclosure comprises a right thumbboard and a left thumbboard, a front panel, a back panel, a lid panel, and a lid support mechanism. The lid support mechanism is configured to support the lid panel, which is positioned in an open position. The lid support mechanism comprises a pivot shaft, a support member, and a positioning part. The support member is pivotally supported by a pivot shaft inserted through a shaft insertion hole. The positioning part is configured to contact the support member and restrict the range of rotation of the support member. The support member is configured to rotate from a first contact position to a second contact position.

Description

Technical Field

[0001] The present disclosure relates to an upright piano.

Background Art

[0002] An upright piano including a right side plate, a left side plate, a front plate, a back plate, and a roof plate is known. Patent Document 1 discloses an upright piano including a rotary support member (top support 16). This upright piano is configured such that by changing the rotation position of the rotary support member and causing the rotary support member to support the roof plate (specifically, the opening / closing portion 12b), the roof plate can be changed from the closed position to the open position.

[0003] The rotary support member is configured to be rotatable counterclockwise from the closed position of the roof plate (the state of FIG. 1 in Patent Document 1) to a position where it abuts against the upper end portion of the front upper wall 11a (the state of FIG. 3 in Patent Document 1). Thus, by abutting the rotary support member against the upper end portion of the front upper wall 11a, the rotation position of the rotary support member can be fixed, and the roof plate can be stably supported. [[ID=2)0]]

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the above-described upright piano, in order to rotate the rotary support member from the closed position of the roof plate to a position where it abuts against the upper end portion of the front upper wall 11a, it is necessary to rotate the rotary support member by 180 degrees or more. Since the rotation angle is large, the rotation operation is complicated.

[0006] Furthermore, in order to change the roof panel from the open position to the closed position, the rotation support member must be rotated by more than 180 degrees when rotating it from the position where it abuts the upper end of the front upper wall 11a to the closed position of the roof panel, making the rotation operation cumbersome.

[0007] It is also possible to support the roof panels by rotating the pivot support member within a range smaller than 180 degrees; however, in this case, the rotation position of the pivot support member is not fixed, resulting in the roof panels being supported in an unstable state.

[0008] Therefore, one aspect of this disclosure is the desire to provide an upright piano that reduces the complexity of the work involved in switching the roof panel between a closed position and an open position. [Means for solving the problem]

[0009] An upright piano according to one aspect of this disclosure comprises a right and left thumbboard, a front panel, a back panel, a lid panel, and a lid support mechanism. The front panel is located between the right and left parent plates, on the side closer to the performer. The back panel is located between the right and left parent plates, on the side further away from the performer.

[0010] The roof panels are positioned on the right main panel, left main panel, front panel, and back panel. The roof panels are configured to move between a closed position and an open position. The closed position is the position where the upper part of the interior space formed by the right main panel, left main panel, front panel, and back panel is closed off. The open position is the position where the upper part of the interior space is open.

[0011] The roof support mechanism is configured to support the roof panels positioned in the open position. The roof support mechanism comprises a pivot shaft, a support member, and a positioning unit. The pivot axis is fixed to either the right or left parent plate.

[0012] The support member is formed in an elongated shape having a first end and a second end. The support member is provided with a shaft insertion hole located closer to the second end than to the first end. The support member is pivotally supported by a pivot shaft inserted through the shaft insertion hole.

[0013] The positioning part is fixed within the rotational range of the support member on either the right or left parent plate. The positioning part is configured to contact the support member and restrict the rotational range of the support member.

[0014] The support member is configured to rotate from a first contact position to a second contact position. The support member comprises a first contact portion and a second contact portion. The first contact portion is the portion that contacts the positioning portion when the support member is positioned at the first contact position. The second contact portion is the portion that contacts the positioning portion when the support member is positioned at the second contact position.

[0015] The support member is configured such that, when positioned at the first contact position, its first end contacts the roof panel in the open position to support the roof panel. When positioned at the second contact position, the support member is configured to be positioned lower than the upper ends of the right and left main panels.

[0016] In an upright piano with this configuration, the range of rotation of the support member is restricted to the range from the first contact position to the second contact position. As a result, when changing the roof panel from a closed position to an open position, the support member can be easily set to a position where it can support the roof panel by rotating the support member to the first contact position.

[0017] Furthermore, when changing the roof panel from an open position to a closed position, the support member can be easily set to a position where the entire support member is housed within the internal space by rotating the support member to the second contact position.

[0018] Therefore, according to the upright piano of the present disclosure, when switching the roof panel between the closed position and the open position, the complexity of the operation can be reduced. The roof support mechanism may include a cylindrical spacer. The cylindrical spacer may be configured in a cylindrical shape. The inner diameter dimension of the cylindrical spacer may be formed to be large enough to allow the rotation axis to pass through. The shaft insertion hole of the support member may be formed with an inner diameter dimension large enough to allow the cylindrical spacer to pass through. The support member may be pivotally supported by the rotation shaft inserted through the shaft insertion hole and the cylindrical spacer.

[0019] In the above upright piano, in a free state where no external force is applied, the support member may be pivotally supported in a state where the first end can move to a position lower than the upper ends of the right and left main plates by gravity.

[0020] Thereby, when changing the roof panel from the open position to the closed position, the user can lift the roof panel upward and separate it from the support member, so that the user does not touch the support member, and the support member rotates by gravity and stops at the second contact position where the second contact portion contacts the positioning portion.

[0021] In the above upright piano, the support member may have an elongated shape extending from the first end to the second end. The first contact portion may be configured to contact a position of the positioning portion facing the roof panel.

[0022] With such a support member, when the first contact portion contacts the positioning portion, the external force from the roof panel received at the first end can be supported not only by the rotation shaft but also by the positioning portion. Thereby, the roof panel can be supported more stably.

[0023] In the above upright piano, the support member may be configured such that the first end rotates within a movement range located on the back side of the rotation axis. Thus, when changing the roof panel from the open position to the closed position, the user only needs to lift the roof panel, and without the user touching the support member, the support member rotates by gravity until the second contact portion comes into contact with the positioning portion.

[0024] In the upright piano described above, the support member may be formed such that the rotation range of the support member from the first contact position to the second contact position is smaller than 90 degrees. Thereby, it is possible to suppress the movement distance (in other words, the rotation distance) of the support member from the first contact position to the second contact position from becoming too large. For this reason, when changing the roof panel from the closed position to the open position, it is possible to suppress the burden of the operation work of the support member from becoming too large.

[0025] In the upright piano described above, the roof panel may be composed of a single plate. Also, in the upright piano described above, the roof panel may be configured to include two plates.

[0026] In the upright piano described above, the roof panel may include a contact member on the bottom surface of the roof panel. The contact member may have a concave portion sized to accommodate the first end of the support member. The roof panel provided with such a contact member can suppress the relative position of the support member and the roof panel from shifting when the first end abuts against the concave portion. Therefore, the support state of the roof panel by the support member can be stabilized.

Brief Description of the Drawings

[0027] [Figure 1] It is a perspective view showing the appearance of an upright piano in which the roof panel is in the closed position in the first embodiment. [Figure 2] It is a perspective view showing the appearance of an upright piano in which the roof panel is in the open position in the first embodiment. [Figure 3] It is an exploded perspective view of the support member, roof panel, etc. of the upright piano. [Figure 4]This is a partial cross-sectional view of an upright piano showing the state of the support members when the roof panel is in the closed position. [Figure 5] This is a partial cross-section of an upright piano showing the state of the support members when the roof panel is in the open position. [Figure 6] This is an explanatory diagram showing the back side of the support member. [Figure 7] Figure 6 is a perspective view showing the VII-VII cross-section of the support member. [Figure 8] This is a perspective view showing the appearance of an upright piano in the second embodiment, with the lid in the open position. [Modes for carrying out the invention]

[0028] Embodiments to which this disclosure applies will be described below with reference to the drawings. Furthermore, this disclosure is not limited in any way to the embodiments described below, and it goes without saying that it can take various forms as long as they fall within the technical scope of this disclosure. [1. Embodiments] [1-1. Overall Structure] As shown in Figures 1 and 2, the upright piano 1 of this embodiment (hereinafter also simply referred to as piano 1) comprises a left thumbboard 11, a right thumbboard 13, an upper front panel 15, a lower front panel 17, a back panel 19, a lid panel 21, a keyboard lid 23, pedals 25, and a lid support mechanism 40.

[0029] In the following explanation, when viewing Piano 1 from the performer's perspective, the front side (see Figure 1) will be referred to as "front," the back side as "back," the top side as "top," the bottom side as "bottom," the left side as "left," and the right side as "right."

[0030] The left front panel 11 is a panel located on the left side of piano 1. The right front panel 13 is a panel located on the right side of piano 1. The upper front panel 15 is a panel located on the upper front side of piano 1. The lower front panel 17 is a panel located on the lower front side of piano 1. The back panel 19 is a panel located on the rear side (in other words, the back) of piano 1.

[0031] The roof panel 21 is a board positioned on top of the left main panel 11, the right main panel 13, the upper front panel 15, and the back panel 19. As shown in Figures 3 to 5, the roof panel 21 is attached to the back panel 19 via hinges 31. The roof panel 21 is provided to be openable and closable by the hinges 31. The roof panel 21 is configured to move at least between a closed position and an open position by the rotational movement of the hinges 31.

[0032] Figures 4 and 5 show cross-sections of each part of the roof panel 21 when viewed in the direction of arrow IV-IV, corresponding to the position indicated by the dashed line 21a in Figure 3. As shown in Figures 3 to 5, the hinge 31 comprises a first wing 31a, a second wing 31b, and a pin 31c. The first wing 31a and the second wing 31b are connected by the pin 31c and are configured to rotate around the pin 31c as a central axis. The first wing 31a is fixed to the roof panel 21 by mounting screws 33. The second wing 31b is fixed to the back panel 19 by mounting screws 33.

[0033] As a result, the roof panel 21 is connected to the back panel 19 via a hinge 31, thereby being fixed to the back panel 19 in a rotatable manner. Figures 1 and 4 show the state in which the roof panel 21 is positioned in the closed position. When the roof panel 21 is positioned in the closed position, it closes the upper opening of the internal space formed by the left main panel 11, the right main panel 13, the upper front panel 15, and the back panel 19.

[0034] Figures 2 and 5 show the roof panel 21 in the open position. When the roof panel 21 is positioned in the open position, it opens the upper opening of the interior space formed by the left main panel 11, the right main panel 13, the upper front panel 15, and the back panel 19.

[0035] The keyboard cover 23 is a component configured to cover the keyboard (not shown). Although not shown, the keyboard cover 23 is configured to move between an open position that exposes the keyboard and a closed position that covers the keyboard. The keyboard cover 23 is rotatably mounted via a hinge (not shown). The keyboard cover 23 is configured to rotate between the open position and the closed position around the hinge.

[0036] The pedal 25 is located below the lower front panel 17. The pedal 25 extends forward from below the lower front panel 17. The piano 1 is equipped with three pedals 25. The roof support mechanism 40 is configured to support the roof panel 21 when it is in the open position. When the roof panel 21 is in the closed position, the roof support mechanism 40 is configured to be housed inside the upright piano 1 (in other words, the internal space formed by the left thumbboard 11, the right thumbboard 13, the upper front panel 15, and the back panel 19).

[0037] [1-2. Roof support mechanism] Let me explain the roof support mechanism 40. As shown in Figures 3 to 5, the roof support mechanism 40 comprises a support member 41, a pivot shaft 43, a cylindrical spacer 44, and a positioning part 45.

[0038] The pivot shaft 43 is a long, elongated member fixed to the right parent plate 13. The pivot shaft 43 is constructed using a male screw. The pivot shaft 43 comprises a head portion 43a and a shaft portion 43b. The right parent plate 13 is provided with a first fixing hole 13a configured to fix the pivot shaft 43. The first fixing hole 13a is configured to screw into the shaft portion 43b of the pivot shaft 43.

[0039] The cylindrical spacer 44 is a cylindrical metal component. The cylindrical spacer 44 is sized to allow the shaft portion 43b of the pivot shaft 43 to pass through it. As shown in Figures 3, 4, 5, 6, and 7, the support member 41 has a first end 41a and a second end 41b. The support member 41 is elongated, extending from the first end 41a to the second end 41b. The support member 41 is provided with a shaft insertion hole 41c. The shaft insertion hole 41c is located closer to the second end 41b than to the first end 41a in the support member 41. The shaft insertion hole 41c is formed as a through hole that penetrates the support member 41. The shaft insertion hole 41c has an inner diameter that allows the cylindrical spacer 44 to be inserted through it. In other words, the support member 41 is rotatably supported by the pivot shaft 43 and the cylindrical spacer 44 inserted through the shaft insertion hole 41c.

[0040] In detail, the cylindrical spacer 44 is fixed in a state where it is sandwiched between the head 43a of the pivot shaft 43 and the right parent plate 13. The support member 41 rotates as the inner surface of the shaft insertion hole 41c slides against the outer surface of the cylindrical spacer 44.

[0041] The positioning portion 45 is fixed within the rotational range of the support member 41 on the right parent plate 13. The positioning portion 45 comprises a long axis 45a and a buffer portion 45b. The long shaft 45a is an elongated member. The long shaft 45a is constructed using a male screw. The long shaft 45a comprises a head portion 45a1 and a shaft portion 45a2.

[0042] The cushioning portion 45b is a cylindrical member made of an elastic material (for example, rubber, resin, etc.). The inner diameter of the cushioning portion 45b is sized to allow the shaft portion 45a2 of the long axis 45a to pass through. Specifically, the inner diameter of the cushioning portion 45b is the same size as the outer diameter of the shaft portion 45a2, or larger than the outer diameter of the shaft portion 45a2. The cushioning portion 45b is provided to mitigate the impact that occurs between the support member 41 and the long axis 45a when the support member 41 is supported by the long axis 45a.

[0043] The right parent plate 13 is provided with a second fixing hole 13b configured to fix the positioning portion 45 (specifically, the long axis 45a). The second fixing hole 13b is configured to screw into the shaft portion 45a2 of the long axis 45a.

[0044] The positioning unit 45 is configured to contact the support member 41 and restrict the rotation range of the support member 41. More specifically, the positioning unit 45 restricts the rotation range of the support member 41 to a predetermined range (specifically, the range from the rotation position shown in Figure 4 to the rotation position shown in Figure 5).

[0045] The support member 41 is configured to rotate from the rotation position shown in Figure 5 (hereinafter also referred to as the first contact position TP1) to the rotation position shown in Figure 4 (hereinafter also referred to as the second contact position TP2).

[0046] As can be seen from Figures 4 and 5, the support member 41 is formed such that the range of rotation of the support member 41 from the first contact position TP1 to the second contact position TP2 is less than 90 degrees.

[0047] The support member 41 includes a first contact portion 41d and a second contact portion 41e. The first contact portion 41d and the second contact portion 41e are portions of the support member 41 that contact the positioning portion 45. The first contact portion 41d is the portion that contacts the positioning portion 45 when the support member 41 is positioned at the first contact position TP1. The second contact portion 41e is the portion that contacts the positioning portion 45 when the support member 41 is positioned at the second contact position TP2.

[0048] As shown in Figures 3 to 5, the roof panel 21 is provided with a contact member 47. The contact member 47 is formed in a bottomed cylindrical shape. The contact member 47 is provided with a recess 47a. The recess 47a is formed to a size that can accommodate the first end 41a of the support member 41.

[0049] The roof panel 21 is provided with a recessed hole 21b for embedding the abutment member 47. The recessed hole 21b is formed in the bottom surface 21c of the roof panel 21. The bottom surface 21c is the surface of the roof panel 21 that faces the internal space formed by the left main panel 11, the right main panel 13, the upper front panel 15, and the back panel 19.

[0050] The contact member 47 is embedded in the embedded hole 21b with its recess 47a facing the support member 41. As shown in Figure 5, the support member 41 is configured such that, when positioned at the first contact position TP1, its first end 41a contacts the roof panel 21 in the open position to support the roof panel 21. More specifically, the first end 41a contacts the recess 47a of the contact member 47 of the roof panel 21 in the open position.

[0051] As shown in Figure 4, the support member 41 is configured to be positioned lower than the upper end of the right parent plate 13, in accordance with its placement at the second contact position TP2. In a free state where no external force is applied, the support member 41 is pivotally supported in such a way that its first end 41a can move to a position lower than the upper end of the right main plate 13 due to gravity. Specifically, the inner diameter of the shaft insertion hole 41c is formed to be larger than the outer diameter of the cylindrical spacer 44. This reduces the frictional force between the inner surface of the shaft insertion hole 41c and the outer surface of the cylindrical spacer 44, allowing the support member 41 to move to a position lower than the upper end of the right main plate 13 due to gravity in a free state. Therefore, when changing the roof plate 21 from an open position to a closed position, the user lifts the roof plate 21 upward, separating it from the support member 41. This causes the support member 41 to rotate due to gravity and come to rest in a position where the second contact portion 41e contacts the positioning portion 45.

[0052] The support state of the support member 41 by the pivot shaft 43 and cylindrical spacer 44 is not limited to this configuration. For example, the inner diameter of the shaft insertion hole 41c and the outer diameter of the cylindrical spacer 44 may be adjusted so that a slight frictional force is generated between the inner surface of the shaft insertion hole 41c and the outer surface of the cylindrical spacer 44, such that the support member 41 cannot move due to gravity alone. In this case, the user can change the rotational position of the support member 41 by manipulating the support member 41.

[0053] As shown in Figures 6 and 7, the support member 41 has a protruding portion 41f on the side opposite to the side shown in Figures 4 and 5. The protruding portion 41f is formed to protrude from the surface of the support member 41. The protruding portion 41f is formed as part of the circumferential direction centered on the shaft insertion hole 41c. In other words, the protruding portion 41f is formed in an arc shape as part of the circumferential direction, rather than the entire circumference of a circle centered on the shaft insertion hole 41c. By having the protruding portion 41f, the support member 41 can reduce the contact area with the right parent plate 13, thereby suppressing excessive frictional force between the support member 41 and the right parent plate 13.

[0054] The first contact portion 41d is configured to contact the position of the positioning portion 45 at a position facing the roof panel 21. In this type of support member 41, the first contact portion 41d abuts against the positioning portion 45, allowing the external force from the roof panel 21 received at the first end 41a to be supported not only by the pivot shaft 43 but also by the positioning portion 45. In other words, the support member 41 is configured to support the roof panel 21 while being supported at two points: the pivot shaft 43 and the positioning portion 45. As a result, the support member 41 can support a heavier object compared to a configuration where it is supported at only one point (for example, the pivot shaft 43), thus providing more stable support for the roof panel 21.

[0055] As shown in Figures 4 and 5, the support member 41 is configured to rotate within a range of motion AR1 in which the first end 41a is located behind (in other words, on the rear side of) the pivot axis 43.

[0056] As a result, when the roof panel 21 in the state shown in Figure 5 is moved upward, the support member 41 rotates naturally due to gravity without any external force being applied to it, and moves until the second contact portion 41e contacts the positioning portion 45.

[0057] Therefore, when moving the roof panel 21 from the open position to the closed position, the user simply moves the roof panel 21 upwards (in other words, lifts it), and the support member 41 moves from the first contact position TP1 (see Figure 5) to the second contact position TP2 (see Figure 4) without the user touching the support member 41. After this, the user can move the roof panel 21 from the open position to the closed position by lowering it to the closed position.

[0058] This allows the user to move the roof panel 21 from the open position to the closed position using only one hand, thereby reducing the user's workload. Furthermore, the support member 41 has a decorative finish on its surface. Specifically, the support member 41 is plated with gold. This decorative finish enhances the luxurious feel of the support member 41 and improves the overall aesthetic appearance of the upright piano 1.

[0059] [1-3. Effects] According to the embodiments described in detail above, the following effects can be obtained. In the upright piano 1 of this embodiment, when changing the lid panel 21 from a closed position to an open position, the support member 41 can be easily set to a position where it can support the lid panel 21 by rotating the support member 41 to a first contact position TP1.

[0060] Furthermore, when changing the roof panel 21 from an open position to a closed position, the support member 41 can be easily set to a position where the entire support member 41 is housed within the internal space by rotating the support member 41 to the second contact position TP2.

[0061] Therefore, according to the upright piano 1, the complexity of the work involved in switching the lid panel 21 between the closed and open positions can be reduced. Furthermore, in the upright piano 1, when changing the lid panel 21 from the open position to the closed position, the user lifts the lid panel 21 upwards, separating it from the support member 41. This allows the support member 41 to rotate due to gravity without the user touching it. The support member 41 then comes into contact with the positioning part 45, and the support member 41 comes to rest at the second contact position TP.

[0062] Furthermore, in the upright piano 1, the support member 41 is configured to support the lid 21 while being supported at two points: the pivot shaft 43 and the positioning part 45. As a result, the support member 41 can support a heavier object compared to a configuration where it is supported at only one point (for example, the pivot shaft 43), thus providing more stable support for the lid 21.

[0063] Furthermore, in the upright piano 1, the support member 41 is formed such that the range of rotation of the support member 41 from the first contact position TP1 to the second contact position TP2 is less than 90 degrees. This prevents the distance traveled by the support member 41 from the first contact position TP1 to the second contact position TP2 (in other words, the rotation distance) from becoming too large. Therefore, when changing the lid panel 21 from the closed position to the open position, it is possible to prevent the burden of operating the support member 41 from becoming too great.

[0064] Furthermore, in the upright piano 1, the lid 21 is equipped with a contact member 47, and the first end 41a contacts the recess 47a of the contact member 47, thereby suppressing misalignment of the relative position between the support member 41 and the lid 21. As a result, the upright piano 1 can stabilize the support state of the lid 21 by the support member 41.

[0065] [1-9. Correspondence of Terms] The upper front panel 15 and the lower front panel 17 correspond to examples of front panels in this disclosure. [2. Other Embodiments] While embodiments of this disclosure have been described above, it goes without saying that this disclosure is not limited to the embodiments described above and can take various forms as long as they fall within the technical scope of this disclosure.

[0066] (2A) In the above embodiment, a configuration in which the roof panel 21 is made of a single panel has been described, but the upright piano of this disclosure is not limited to this configuration. For example, as shown in Figure 8, the roof panel may be made of two panels.

[0067] The second upright piano 101 shown in Figure 8 is constructed in which the lid panel 21 of the upright piano 1 in the first embodiment is replaced with a second lid panel 121. The second roof panel 121 comprises a movable panel 121a and a fixed panel 121b. The movable panel 121a is positioned on the front side of the upper part of the internal space formed by the left main panel 11, the right main panel 13, the upper front panel 15, and the back panel 19. The fixed panel 121b is positioned on the rear side (in other words, the back side) of the upper part of the internal space formed by the left main panel 11, the right main panel 13, the upper front panel 15, and the back panel 19.

[0068] The fixed plate 121b is fixed to the left parent plate 11, the right parent plate 13, and the back plate 19. The movable plate 121a is attached to the fixed plate 121b via a hinge (not shown). The movable plate 121a is provided to be openable and closable by the hinge. The movable plate 121a is configured to move to at least a closed position and an open position by the rotational movement of the hinge.

[0069] The second upright piano 101 is equipped with a roof support mechanism 40 similar to that of the first embodiment. As shown in Figure 8, in the second upright piano 101, the movable plate 121a of the second roof plate 121 is configured to be held in the open position by the roof support mechanism 40.

[0070] Although not shown in the diagram, the movable plate 121a of the second roof panel 121 is configured to be positioned in a closed position that closes the upper part of the internal space formed by the left main plate 11, the right main plate 13, the upper front plate 15, and the back plate 19 by rotation via a hinge.

[0071] Thus, even in the second upright piano 101, which is equipped with a second roof plate 121 comprising two plates (movable plate 121a and fixed plate 121b), the same effects as those of the upright piano 1 in the first embodiment can be achieved by providing a roof support mechanism 40.

[0072] (2B) In the above embodiment, a configuration in which the roof support mechanism 40 is provided on the right parent plate 13 has been described, but the upright piano of this disclosure is not limited to this configuration. For example, the roof support mechanism 40 may be provided on the left parent plate 11.

[0073] (2C) In the above embodiment, a decorative form of gold plating was described as a decorative form of the support member, but the decorative form of the support member in the upright piano of this disclosure is not limited to such a decorative form. For example, it may be a decorative form of silver plating, or a decorative form of plating that includes both gold and silver.

[0074] (2D) In ​​the above embodiment, a configuration in which the roof panel 21 is provided with a contact member 47 has been described, but the upright piano of this disclosure is not limited to this configuration. For example, the roof panel may not be provided with a contact member 47, and the first end 41a of the support member 41 may be in contact with the embedded hole 21b.

[0075] (2E) In the above embodiment, a configuration comprising a cylindrical spacer 44 has been described, but the upright piano of this disclosure is not limited to this configuration. For example, there may be a configuration in which only the pivot shaft 43 is inserted through the shaft insertion hole 41c of the support member 41, without the provision of a cylindrical spacer. The shaft insertion hole 41c may be formed with an inner diameter dimension large enough to allow the pivot shaft 43 to be inserted. In other words, the support member 41 may be pivotably supported by the pivot shaft 43 inserted through the shaft insertion hole 41c. Furthermore, the pivot shaft 43 may be screwed into the first fixing hole 13a of the right parent plate 13 when the distance dimension between the head 43a and the right parent plate 13 is greater than the thickness dimension of the support member 41. As a result, when changing the roof panel 21 from the open position to the closed position, the user lifts the roof panel 21 upward, separating it from the support member 41. This causes the support member 41 to rotate due to gravity and come to rest in a position where the second contact portion 41e contacts the positioning portion 45.

[0076] However, the support state of the support member 41 by the pivot shaft 43 alone is not limited to this configuration. For example, the screwed state of the pivot shaft 43 in the first fixing hole 13a may be adjusted so that the support member 41 is held between the head 43a and the right main plate 13 with light force. In other words, the screwed state of the pivot shaft 43 in the first fixing hole 13a may be adjusted so that a light frictional force is generated between the head 43a and the support member 41, and between the right main plate 13 and the support member 41. In this case, the user can change the rotational position of the support member 41 by operating the support member 41.

[0077] (2F) Multiple functions of one component in the above embodiment may be realized by multiple components, or one function of one component may be realized by multiple components. Also, multiple functions of multiple components may be realized by one component, or one function realized by multiple components may be realized by one component. Furthermore, some of the configuration of the above embodiment may be omitted. Furthermore, at least some of the configuration of the above embodiment may be added to or replaced with the configuration of other above embodiments. [Technical Concept Disclosed in This Specified Specification] [Item 1] It is an upright piano, Right parent plate and left parent plate, A front plate provided between the right and left parent plates, on the side closer to the performer, A back panel provided between the right and left parent plates, on the side furthest from the performer, A roof panel is positioned on the right main panel, the left main panel, the front panel, and the back panel, and is configured to move between a closed position that closes the upper part of the internal space formed by the right main panel, the left main panel, the front panel, and the back panel, and an open position that opens the upper part of the internal space. A roof support mechanism configured to support the roof panel positioned in the open position, Equipped with, The aforementioned roof support mechanism is A pivot shaft fixed to the right parent plate or the left parent plate, A support member formed in an elongated shape having a first end and a second end, comprising a shaft insertion hole provided at a position closer to the second end than the first end, and rotatably supported by the pivot shaft inserted through the shaft insertion hole, A positioning part is fixed within the rotational range of the support member on the right parent plate or the left parent plate, and is configured to contact the support member and restrict the rotational range of the support member, Equipped with, The support member is configured to rotate from a first contact position to a second contact position. The aforementioned support member is The support member has a first contact portion that contacts the positioning portion when the support member is positioned at the first contact position, The support member has a second contact portion that contacts the positioning portion when it is positioned at the second contact position, Equipped with, The support member is configured such that, when positioned at the first contact position, its first end contacts the roof panel in the open position to support the roof panel. The support member is configured to be positioned lower than the upper ends of the right and left parent plates, depending on its placement at the second contact position. Upright piano. [Item 2] The upright piano described in item 1, In a free state where no external force is applied, the support member is pivotally supported such that its first end can move by gravity to a position lower than the upper ends of the right and left parent plates. Upright piano. [Item 3] An upright piano as described in item 1 or item 2, The support member has an elongated shape extending from the first end to the second end, The first contact portion is configured to contact the position of the positioning portion that is opposite to the roof panel. Upright piano. [Item 4] An upright piano that is described in any one of items 1 through 3, The support member is configured such that its first end rotates within a range of motion located on the rear side of the pivot axis. Upright piano. [Item 5] An upright piano that is described in any one of items 1 through 4, The support member is formed such that the range of rotation of the support member from the first contact position to the second contact position is less than 90 degrees. Upright piano. [Item 6] An upright piano that is listed in any one of items 1 through 5, The aforementioned roof panel is made of a single sheet of material. Upright piano. [Item 7] An upright piano that is described in any one of items 1 through 6, The aforementioned roof panel is composed of two panels. Upright piano. [Item 8] An upright piano that is described in any one of items 1 through 7, The roof panel is provided with a contact member having a recess on its bottom surface that is large enough to accommodate the first end of the support member. Upright piano. [Explanation of Symbols]

[0078] 1...Upright piano, 11...Left parent plate, 13...Right parent plate, 15...Upper front plate, 17...Lower front plate, 19...Back plate, 21...Roof plate, 21b...Recessed hole, 21c...Bottom surface, 31...Hinge, 40...Roof support mechanism, 41...Support member, 41a...First end, 41b...Second end, 41c...Shaft insertion hole, 41d...First contact part, 41e...Second contact part, 41f...Protruding part, 43...Rotating shaft, 43a...Head, 43b...Shaft part, 45...Positioning part, 45a...Long axis, 45b...Cushioning part, 47...Contact member, 47a...Recess, 101...Second upright piano, 121...Second roof plate, 121a...Movable plate, 121b...Fixed plate, AR1...Range of movement.

Claims

1. It is an upright piano, Right parent plate and left parent plate, A front plate provided between the right and left parent plates, on the side closer to the performer, A back panel provided between the right and left parent plates, on the side furthest from the performer, A roof panel is positioned on the right main panel, the left main panel, the front panel, and the back panel, and is configured to move between a closed position that closes the upper part of the internal space formed by the right main panel, the left main panel, the front panel, and the back panel, and an open position that opens the upper part of the internal space. A roof support mechanism configured to support the roof panel positioned in the open position, Equipped with, The aforementioned roof support mechanism is A pivot shaft fixed to the right parent plate or the left parent plate, A support member formed in an elongated shape having a first end and a second end, comprising a shaft insertion hole provided at a position closer to the second end than the first end, and rotatably supported by the pivot shaft inserted through the shaft insertion hole, A positioning part is fixed within the rotational range of the support member on the right parent plate or the left parent plate, and is configured to contact the support member and restrict the rotational range of the support member, Equipped with, The support member is configured to rotate from a first contact position to a second contact position. The aforementioned support member is The support member has a first contact portion that contacts the positioning portion when the support member is positioned at the first contact position, The support member has a second contact portion that contacts the positioning portion when it is positioned at the second contact position, Equipped with, The support member is configured such that, when positioned at the first contact position, its first end contacts the roof panel in the open position to support the roof panel. The support member is configured to be positioned lower than the upper ends of the right and left parent plates, depending on its placement at the second contact position. Upright piano.

2. An upright piano according to claim 1, In a free state where no external force is applied, the support member is pivotally supported such that its first end can move by gravity to a position lower than the upper ends of the right and left parent plates. Upright piano.

3. An upright piano according to claim 2, The support member has an elongated shape extending from the first end to the second end, The first contact portion is configured to contact the position of the positioning portion that is opposite to the roof panel. Upright piano.

4. An upright piano according to claim 3, The support member is configured such that its first end rotates within a range of motion located on the rear side of the pivot axis. Upright piano.

5. An upright piano according to claim 4, The support member is formed such that the range of rotation of the support member from the first contact position to the second contact position is less than 90 degrees. Upright piano.

6. An upright piano according to claim 5, The aforementioned roof panel is made of a single sheet of material. Upright piano.

7. An upright piano according to claim 5, The aforementioned roof panel is composed of two panels. Upright piano.

8. An upright piano according to any one of claims 1 to 7, The roof panel is provided with a contact member having a recess on its bottom surface that is large enough to accommodate the first end of the support member. Upright piano.

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