JP2005128353A - Music stand device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a music stand device in which depth length of a music plate setting table such as a top plate or the like is reduced while the height of the music plate is sufficiently secured. <P>SOLUTION: In the music stand device on which the music plate is arranged on a setting table in a freely standing or laying manner, the device is provided with a guide member 31 which is fixed to the setting table and extended in an approaching or separating direction to/from a user, a guided member 32 which can be advanced to the approaching side to the user or retracted to the separating side from the user, a music plate 40 which is supported by the guided member 32, a turnable supporting section 50 which supports the music plate in a freely standing or laying manner in a turnable manner, and a lock mechanism 60 which holds the music plate in a standing condition and releases the holding. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a music stand device for a keyboard instrument. Examples of keyboard instruments to which the present invention can be applied include electronic keyboard instruments such as an electronic piano and an electronic organ, as well as musical instruments including a keyboard and a musical tone control operator such as an acoustic piano, a pipe organ, a harpsichord, and a Celesta.

  For a musical score board of a conventional keyboard instrument, for example, a music stand device described in JP-A-11-109947 (Patent Document 1) is known. However, in the structure of this music stand device, the height of the music plate is limited to the range of the depth length of the top plate as the music plate installation base from the rotation axis at the lower end of the music plate. In other words, when the height of the music board is larger than the depth of the top board, the music board rotates around the lower end of the music board when the music board is not used (when the music board is tilted backward). Therefore, a part of the musical score board exceeding the depth length of the top board jumps out from behind the keyboard instrument.

In recent years, the size of the keyboard instrument itself has also been made compact. Therefore, if the height of the music board is designed to match the depth of the top board, the height of the music board becomes insufficient, and when the music is placed Not stable enough. In other words, if the depth of the top board is shortened in order to design the entire keyboard instrument compactly, the height of the music board must be such that the music board does not protrude backward when the music board is tilted down. I must. In such a case, the height of the music score board is considerably lower than the standard music score board height, and it is difficult to stably place the music score.
Japanese Patent Laid-Open No. 11-109947 (paragraph 0003, FIG. 3)

  An object of this invention is to provide the music stand apparatus which can shorten the depth length of a music board installation stand, such as a top board, fully securing the height of a music board.

  In order to achieve the above-mentioned object, the present invention provides a music stand device in which a music plate is provided on the installation table so as to be able to fall freely. The guide member is fixed to the installation table and extends in a direction away from the user. The guide member that supports and slides while being guided by the guide member and capable of moving forward toward the side approaching the user and retracting toward the side away from the user, and the musical score plate are made to fall freely The music stand device is provided with a rotation support portion that is rotatably supported and a lock mechanism that holds the music plate in an upright state and can release the holding.

  In this music stand device, the guide member is attached to the installation stand, and the guided member is advanced toward the approaching side and guided to the separation side with respect to the user, and the music score plate is attached to the guided member. When using a musical score board, it may be moved rearward on the installation table along the guide member, or may be brought to an appropriate position before and after. Then, it is possible to hold the state where the musical score plate is raised by the lock mechanism around the rotation support portion. On the other hand, when the musical score board is tilted when not in use, the musical score board can be pulled forward along the guide member. Thereby, it is possible to avoid the rear end portion of the music score plate from protruding from the installation base even when the music score plate is tilted down. That is, even if the music board is made larger than the depth dimension of the installation table by a distance that allows the music board to be moved forward, the fallen music board can be prevented from protruding backward from the installation table. Therefore, it is possible to shorten the depth length of the music board installation table such as the top board while sufficiently securing the height of the music board.

  The rotation support portion includes a shaft portion serving as a rotation center and a receiving portion that receives and supports the shaft portion as a rotation support portion constituting member, and the shaft portion and the receiving portion are provided on the installation base. One of the musical score plates and the other of the musical score plates are attached to and disengaged from each other, and among the rotation support portion constituting members, the rotation support portion constituting members provided on the installation base are When the musical score plate moves to the sliding end on the side away from the user, the musical score plate engages with the rotational support portion constituting member of the musical score plate, and the musical score plate can be rotated with the guided member fixed. It is desirable that they are arranged as follows.

  As described above, when one of the shaft portion and the rotation support portion constituting member that receives and supports the shaft portion is moved to the sliding end on the side away from the user, the rotation of the music plate is performed. Since the musical score plate can be rotated while the guided member is fixed by being arranged so as to be engaged with the moving support component member, it is possible to stabilize the standing state of the musical score plate with a simple operation. Can do.

  The lock mechanism includes a holding member that holds the music plate in an upright state and a movable member that can move to a position separated from the holding position, and the music plate is in a range from a lying state to a standing state. The musical score plate is held in the standing position by setting the movable member to a position deviating from the holding position and bringing the movable member to the holding position when the musical score plate reaches the standing position. It is desirable that the musical score plate can be laid down by removing the moving member from the holding position when it is turned from the standing state to the original side and then tilted back to the original side.

  By providing this moving member, the musical score plate can be operated without being restrained by the moving member in the range from the lying down state to the standing state, and is held in the standing state when reaching the standing state. When it is further rotated from the installed state in the direction to stand up and then tilted back to the original side, it can be tilted without being restrained by the moving member. Thus, the music board can be erected and laid down with a simple operation.

  The lock mechanism is provided on the musical score plate and the moving member supported to be able to reciprocate on the installation base in a state of receiving an urging force directed to the holding position by an elastic member, and the musical score plate is in a lying state. When the musical score plate reaches the standing state, and the abutting portion that contacts the moving member and holds the position of the moving member against the biasing force when in the range up to the standing state A restraining member having a recessed portion that is supported by the moving member by receiving the moving member that moves forward in accordance with the urging force and moves away from the abutting portion and prevents the musical score plate from falling down, and the musical score plate, A pressing portion that retracts the moving member from the holding position against the urging force of the elastic member when the plate is further rotated from the standing state to the standing position; Biased towards the member, A temporary fixing member provided with a detaching part at a part and a holding part at a rear part, and the holding part is moved backward from the holding position by the pressing part and reaches a position removed from a recessed part of the stopping member. The movable member engages with and holds the moving member, and the detaching part contacts a part of the music plate while the musical score plate is in a standing state to a lying state, and the temporary fixing member is biased. The holding portion may be provided so as to move against the moving member.

  According to this configuration, the moving member is pressed backward by the contact portion of the restraining member until the musical score plate is brought to the standing state, and the moving member is received by the recessed portion when the standing state is reached. It is supported by the member and can stably hold the standing state of the musical score plate. Further, when the musical score plate is further rotated from the standing state in the standing direction, the pressing portion of the temporary fixing member moves the moving member backward to temporarily hold the holding member, and the moving member and the restraining member are brought into contact with each other. By avoiding it, the music board can be laid down. Then, in the middle of the fall, the detaching portion acts to release the moving member from the holding portion and return to the state where it comes into contact with the contact portion of the restraining member, thereby enabling the operation to be repeated. In this way, a stable standing state of the musical score plate can be obtained and can be laid down with a simple operation.

  The lock mechanism includes a support member provided on the installation base and provided with a guide groove, and the moving member coupled to the music score plate and engaged with the guide groove. The guide groove stands the music score plate. A standing path that guides the moving member when rotating in the direction, a lodging path that guides the moving member when rotating in the direction of tilting the musical score plate, and a musical score between the standing path and the falling path A holding path for receiving a moving member so as to hold the musical score plate in an upright state, the standing side end of the standing path crossing the standing path. A second communication path extending in a direction crossing the holding path, the standing end of the holding path being at a position on the standing side of the first communication path. Is connected to the lodging pass. And the lodging path are connected to each other at the lodging side portion, and the support member and the moving member are connected to the first connection path when the moving member is positioned at the standing side end of the standing path. The elastic member interposed between the two members attaches to the holding path so that when it is located at the standing side end of the holding path, it moves to the lodging path via the second connection path. Furthermore, when the moving member is located at the connection point between the standing path and the lodging path, the moving member is allowed to move from the lodging path to the standing path, and is prevented from moving in the reverse direction. It is possible to provide direction limiting means.

  According to this configuration, the moving member of the music board is guided by the guide groove of the support member provided on the installation table, and reaches the holding path from the standing path through the first communication path during the standing operation. The standing state is maintained. When the music plate is further rotated in the direction in which the musical score plate is raised from this state, the moving member reaches the lodging pass from the holding path through the second connection pass, and the musical score plate can be laid down. The movement of the moving member through these communication paths is automatically performed when the musical score plate is operated by an elastic member acting between the supporting member and the moving member. In addition, when the moving member is located at the connection point between the standing path and the lodging path, the movement of the moving member from the lodging path to the standing path is permitted and the movement in the reverse direction is prevented by the direction limiting means. Therefore, the moving member is circulated to the standing path, the lodging path, etc. by the operation of standing and lying down the musical score board, and the repeated operation is possible. Thus, based on a simple structure, a stable standing state of the music score board can be obtained, and standing and lying down can be easily performed.

  As described above, according to the present invention, it is possible to provide a music stand device capable of shortening the depth length of a music plate installation table such as a top plate while ensuring a sufficient height of the music plate.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Note that in the drawings used for description, the same or similar parts may be denoted by the same reference numerals and description thereof may be omitted.

  FIG. 1 shows an example in which the present invention is applied to an electronic keyboard instrument. FIG. 1 is a longitudinal side view of an electronic keyboard instrument 1, which has a keyboard lid 2 that is divided into two parts in the front and rear directions and that is joined by a hinge part in the middle. The electronic keyboard instrument 1 includes a white key 3 and a black key 4, an electronic circuit for generating and controlling musical sounds, a speaker (not shown), and the like, and these are housed in the instrument body. The musical instrument body includes a shelf board 5, a mouth bar 6, a back board 7, left and right side boards 8, a top board 9, legs 19, and the like. In the case of the musical instrument body, a musical sound control device (not shown), a switch and controller, a power supply device, a liquid crystal display, a connection terminal, and the like are mounted. On the top surface of the top plate 9, there is mounted a music stand device 30 that uses the top plate as an installation stand and that allows the music plate to fall freely.

  2 is a longitudinal side view centering on the music stand device 30 in the electronic keyboard instrument, FIG. 3 is a plan view of the side portion thereof, and FIG. 4 is a sectional view taken along line IV-IV in FIG. The music stand device 30 supports the music plate 40 so as to be able to fall down and move in the front-rear direction in a lying state. In FIG. 2, a state where the musical score plate 40 is tilted and pulled forward is indicated by a solid line, and a state where the musical score plate 40 is moved backward while being tilted and a standing state are indicated by a two-dot chain line. The top plate 9 is formed with a recess that opens to the upper surface at a position corresponding to the musical score plate 40 in a standing state, and a musical score receiver 40a is provided therein.

  The music stand device 30 is fixed to the top plate 9 and extends in the approaching / separating direction (front-rear direction) with respect to the user, and slides while being guided by the guide member and advanced toward the side approaching the user. And a guided member 32 capable of retreating to the side to be separated.

  The guided member 32 is a long and narrow plate, and is arranged such that the longitudinal direction thereof is in the front-rear direction of the top plate 9. The guide member 31 includes a sheath portion 31a that surrounds the guided member 32 in the width direction and the thickness direction, and a bottom wall 31b. The bottom wall 31b is fixed to the top plate 9 with screws 31c. The guided member 32 is supported by the guide member 31 so as to be slidable in the direction of entering and exiting the sheath portion 31a.

  An attachment member 41 for coupling to the musical score plate 40 is fixed to the distal end portion of the guided member 32. The mounting member 41 is integrally formed so that a flat plate portion 41a in contact with the musical score plate 40 and a projecting piece 41b extending vertically from the center of the flat plate portion are formed in a T shape, and the musical score plate 40 in a lying state. The protruding piece 41b is attached to the flat plate portion 41a. The protruding piece 41b is fixed to one surface (in this example, the left surface in FIG. 3) of the guided member 32 with a screw or the like. The musical score plate 40 is thus supported by the guided member 32 via the attachment member 41.

  A shaft portion 51 is attached to the surface of the guided member 32 on the side opposite to the protruding piece 41b attachment side. The shaft portion 51 is an elongated small piece, and is fixed to the guided member 32 with screws or the like so that the longitudinal direction is horizontal when the musical score plate is in a lying state, and both end surfaces are within the receiving portion 52 described later. It has an arc shape that can rotate.

  Corresponding to the shaft portion 51, a receiving portion 52 is attached to the top plate 9 in front of the guide member 31. The receiving portion 52 is L-shaped in front view by two portions perpendicular to each other, and one flat plate portion 52a is fixed to the top plate 9, and the other is C-shaped at the tip of the standing upright portion 52b. A portion 52c is provided. The C-shaped part 52c has a shape in which an opening 52d is provided in a part of a circle. Of the portion facing the opening 52d in the C-shaped portion 52c, a projecting portion 52e inward in the radial direction is provided in an upper portion. This is for locking the rotation of the shaft portion 51 in the holding position described later.

  The shaft portion 51 of the musical score plate 40 is guided by the guide member 31 together with the guided member 32 and the musical score plate 40 and moves in the depth direction. The receiving part 52 is provided at a position for receiving the shaft part 51 when the musical score plate 40 moves to the rear end (sliding end on the side away from the user). FIG. 5 shows a state where the receiving portion 52 receives the shaft portion 51 and supports the shaft portion 51 so as to be rotatable. That is, FIG. 5A shows a state where the musical score plate 40 is moved backward while the music score plate 40 is tilted and before the shaft portion 51 reaches the receiving portion 52, and FIG. FIG. 5 (c) shows a state in which the receiving portion 52 is reached and is received in the C-shaped portion 52c from the opening 52d, and in FIG. 5C, the shaft portion 51 rotates in the C-shaped portion 52c together with the turning operation for raising the musical score plate 40. Shows the state. Thus, the shaft portion 51 and the receiving portion 52 constitute a rotation support portion 50 that is the center of rotation of the musical score plate 40.

  The music stand device further includes a lock mechanism 60 that holds the music plate in an upright state and can release the holding. The lock mechanism 60 holds a moving member 61 as a main lock member, a compression spring 63 as an elastic member used to allow movement in the depth direction when moving immediately before locking and unlocking, and the like. A locking function member including the frame portion 62, a temporary fixing member 64 for temporarily fixing a locking member (moving member 61) provided with the detaching portion 64b and the holding portion 64a, a restraining member 66, and a pressing portion 67. doing.

  The moving member 61 is a rectangular parallelepiped block, and is guided by a frame portion 62 fixed to the sheath portion 31 a of the guide member 31 so as to be slidable in the front-rear direction of the top plate 9. It is urged | biased ahead by the compression coil spring 63 arrange | positioned between a part and the frame 62 62 rear end surface.

  A temporary fixing member 64 is disposed immediately below the moving member 61. In this example, a recess 60a that opens on the top surface is formed in the top plate 9, and the temporary fixing member 64 is supported by a rotating shaft 65 supported on the side wall of the recess 60a and is rotated in the vertical direction. It is made possible and is urged upward by a compression coil spring 68 provided between the bottom surface of the temporary fixing member and the bottom of the recess 60a.

  The temporary fixing member 64 has a width on which the moving member 61 is placed and a length that allows the moving member to slide in the front-rear direction, and has a flat plate shape as a whole. On the upper surface of the temporary fixing member 64, a holding portion 64a and a detaching portion 64b that protrude upward are formed. Details of these will be described later.

  The locking mechanism further includes a restraining member 66 and a pressing portion 67 that cooperate with the moving member 61 as components. In this example, the restraining member 66 is formed integrally with the rear portion of the mounting member 41 described above, and operates together with the music score plate 40. The restraining member 66 is provided so as to perform the following action in a state where the musical score plate is moved to the rear end portion and the shaft portion 51 is received by the receiving portion 52. That is, as shown in FIG. 5, when the musical score plate 40 is in a lying state (FIG. 5A), the rear end surface of the restraining member 66 hangs linearly from the flat plate portion 42 of the mounting member 41 and starts from its lower end. It extends in an arc shape around the rotation axis of the music plate. When the shaft portion 51 is received by the receiving portion 52 (FIG. 5B), the linear portion and the arc-shaped portion are within the range from the lying down state to the standing state. The contact portion 66a pushes the moving member 61 backward.

  Further, the portion located at the rear end of the restraining member 66 when the musical score plate is in the standing state (FIG. 5C) is the shaft portion 51 in the horizontal direction from the lower end of the arc-shaped portion of the contact portion 66a. It extends to the side, extends vertically downward before the shaft portion 51, and forms a recessed portion 66b surrounded by the horizontal portion and the vertical portion. The recessed portion 66b receives the moving member 61 that moves away from the contact portion 66a and moves forward according to the urging force of the spring 63 when the musical score plate 40 reaches the standing state. The moving member 61 is prevented from advancing with the front surface in contact with the vertical portion of the recessed portion 66b. On the other hand, in the restraining member 66, the horizontal portion of the recessed portion 66b is in contact with the upper surface of the moving member 61 and is prevented from rotating in the direction of the music board lying down, so that the music board 40 is kept standing. At this time, the shaft portion 51 comes into contact with the protruding portion 52e of the C-shaped portion 52c. Thereby, the axial part 51 and a musical score board are prevented from moving to the front. The position at which the moving member 61 has thus engaged with the recessed portion 66b is referred to as a holding position.

  When the musical score plate 40 is in the standing state, the tip of the portion of the attachment member 41 that extends downward serves as a pressing portion 67. By sufficiently taking a distance from the center of the shaft portion 51 to the pressing portion 67, when the shaft portion 51 is received by the receiving portion 52 and the musical score plate is further rotated from the standing state, the pressing portion 67 retreats the moving member 61 from the holding position against the urging force of the spring 63.

  The temporary fixing member 64 described above is configured as follows in relation to these operations. 6A to 6B show the movement of each part when the musical score plate 40 changes from the lying down state to the standing state and again from the lying down state with the shaft portion 51 being received by the receiving portion 52. . FIG. 6B (3) shows a state corresponding to FIG. 5C, and the moving member 61 is in the holding position. When the musical score plate 40 is further rotated from this state in the direction in which the musical score plate 40 is raised, the moving member 61 is moved backward from the holding position by the pressing portion 67 formed on the mounting member 41 as shown in FIG. 6B (4). And as shown to FIG. 6C (5), the above-mentioned holding | maintenance part 64a is provided in the location in which the moving member 61 is located when it rotates further. The holding portion 64a has a rear end surface of the protruding portion formed vertically, and engages with a front end surface of the moving member 61 to prevent the moving member from moving forward. The position of the holding portion 64a does not contact the contact portion 66a of the restraining member 66 even if the moving member 61 that is engaged with the holding portion and holds the position rotates in the direction in which the musical score plate 40 is tilted again. Decided. Further, it is desirable that the amount of rotation of the musical score plate 40 necessary for this operation is such that the user can clearly be aware of the rotation operation from the normal standing state and the rotation angle is not so large that the operation is troublesome. This can be, for example, turning the music board to a substantially vertical state.

  The detachment part 64b of the temporary fixing member 64 is determined as follows. 6C (5), when the musical score board 40 is then tilted back, the pressing portion 67 formed on the attachment member 41 is separated from the moving member 61 as shown in FIG. 6C (6). . At this time, the position of the moving member 61 is held by the holding portion 64a. Further, a detaching portion 64b is provided at a position where the musical score plate 40 is engaged with the distal end portion of the attachment member 41 when the musical score plate 40 is tilted. The amount of protrusion upward of the detachable portion 64b is such that when the engaged mounting member 41 gets over the detachable portion 64b, the temporary fixing member 64 is rotated downward around the rotation shaft 65 against the spring 68. As a result, the moving member 61 is set to be detached from the holding portion 64a.

  Hereinafter, the usage method of the music stand apparatus which concerns on this embodiment is demonstrated. When the musical score board is not used, the musical score board is normally in a fallen state and moved to the front (user side) end of the guide member 31 as shown by the solid line portion in FIG. From this state, the user moves the music score board 40 backward (separated side) by hand. This movement is performed along the guide member 31, and the shaft portion 51 attached to the musical score plate 40 reaches a position where it is received by the receiving portion 52 (FIG. 6A (1)). At this time, the moving member 61 positioned forward by the spring 63 is pushed slightly rearward by the contact portion 66a at the rear end portion of the mounting member 41.

  At this position, the user raises the musical score board 40 (FIG. 6A (2)). Until the musical score plate 40 reaches the standing state, the moving member 61 is in contact with the contact portion 66a. When the musical score plate 40 reaches the standing state, the moving member 61 is disengaged from the contact portion 66a and takes the holding position engaged with the recessed portion 66b (FIG. 6B (3)). Thereby, the musical score board 40 maintains an upright state.

  When the musical score plate 40 is tilted from this state, the musical score plate 40 is further rotated in the direction in which the musical score plate 40 is raised. Thereby, the moving member 61 is moved back by the press part 67 (FIG. 6B (4)). When the musical score plate 40 is further raised, the moving member 61 pushed by the pressing portion 67 engages with the holding portion 64a of the temporary fixing member 64, and the position is held (FIG. 6C (5)). The user can feel that the moving member 61 is engaged with the holding portion 64a with a click feeling transmitted to the musical score plate 40.

  Thereafter, the user falls down the musical score board 40 in the original direction (FIG. 6C (6)). Since the moving member 61 is engaged with the holding portion and is held in position, the moving member 61 does not come into contact with the contact portion 66a of the restraining member 66 even if the moving member 61 is rotated in the direction of tilting the musical score plate. When the musical score plate is tilted to some extent, the tip of the attachment member 41 engages with the detachable portion 64b (FIG. 6D (7)). Along with this, the temporary fixing member 64 rotates downward around the rotation shaft 65. When the musical score plate is further tilted, the tip of the attachment member 41 gets over the detachable portion 64b. At this time, the moving member 61 is detached from the holding portion 64a and moves forward by the action of the spring 63, and the contact portion 66a of the attachment member 41 is reached. (FIG. 6D (8)).

  Thereafter, the user rotates the musical score plate 40 in the direction of further tilting, and accordingly, the moving member 61 moves the contact portion with the contact portion 66a along the arc-shaped portion (FIG. 6E (9 ) To FIG. 6F (12)). When the musical score plate 40 is in the lying state, the moving member 61 comes into contact with the linear portion of the contact portion 66a (FIG. 6G (13)). In this state, the musical score plate 40 is at the rear end of the sliding range on the top plate 9. The user pulls the musical score plate 40 forward along the guide member 31 and reaches the sliding front end, thereby completing the overturning operation. In this way, the musical score board 40 can be brought to a forward state from the standing state in the lying state, so that the height of the musical score board 40 is made larger than the depth dimension of the top board 9 to stably support the musical score. Even if it can do, it can avoid that a musical score board protrudes back from the rear end of the top plate 9 at the time of lying down.

  In this example, the abutment portion 66a and the pressing portion 67 are formed by a part of the attachment member 41, but these portions may be separate members. Moreover, although the moving member 61 is attached to the side surface of the guide member 31, you may provide separately.

  Next, another embodiment of the present invention will be described.

  7 and 8 show another embodiment of the present invention. FIG. 7 shows a state in which the musical score plate 40 is raised, and FIG. 8 shows a state in which the musical score plate 40 is tilted. The music stand device 30a is provided on the top plate 9 of a musical instrument main body (not shown) as an installation stand.

  The music stand device 30a is provided with a guide member 70 that has a width approximately equal to the width of the music score plate 40 and extends in the front-rear direction (the direction toward and away from the user) and is fixed to the top plate 9. The guide member 70 has a front and rear end protruding upward to form a stopper 71, and a top surface provided with a pair of guide rails 72 extending in the front-rear direction.

  A guided member 80 is placed on the guide member 70. The guided member 80 also has a flat plate shape, has a width substantially equal to the width of the music score plate 40, and has a length in the front-rear direction shorter than that of the guide member 70, and is a slide for storing the tilted music score plate 40 on the top plate 9. It forms a stand. A pair of sliding grooves 81 extending in the front-rear direction is formed on the bottom surface of the guide member 70 and is fitted to the guide rail 72 to guide sliding of the musical score plate. At the front end portion of the guided member 80, a support plate 82 is provided that extends upward to a height necessary for horizontally storing the folded music score plate 40.

  The musical score plate 40 is supported by the upper end portion of the support plate 82 with the hinge 44 at the lower end as a rotating portion, and can be tilted freely. The musical score plate 40 has a plate-like main body, and is integrally provided with a musical score receiver 45 extending forward at the lower end.

  A support bar 91 is coupled to the center of the back surface of the musical score plate 40 by a pivot shaft 92 so as to be pivotable in the vertical direction. Further, on the upper surface of the guided member 80, locking plates 94 provided with locking projections 93 are fixed at a plurality of positions in the front-rear direction (two positions in this example). The support bar 91 locks the lower end to any one of the locking protrusions 93 to bring the musical score plate 40 upright with different inclination angles. If the support bar 91 is rotated forward without being engaged with the locking projection 93 and is moved along the music score board 40, the music score board can be tilted backward. As described above, the support bar 91, the rotation shaft 92, the locking projection 93, and the support plate 94 serve as a lock mechanism 90 that holds the musical score plate in an upright state and releases the hold.

  When the music stand device 30a is used in a state in which the music score plate 40 is erected, as shown in FIG. 7, the music score plate 40 is placed upright by the lock mechanism 90, and the guided member 80 is moved backward on the guide member 70. It can be at the edge or at any position. On the other hand, the guided member 80 can be placed on the front end portion of the guide member 70 when the musical score plate 40 is in a lying state.

  Therefore, even if the height of the music score board 40 is made larger than the depth dimension of the top board 9 so that the music score can be supported stably, the music score board 40 can be slid to the front end of the guided member 80 in a lying state. Since it can do, it can avoid that a musical score board protrudes back from the rear end of the top plate 9 at the time of lying down.

  FIG. 9 shows a music stand device 30b according to still another embodiment of the present invention. The music stand device 30b includes a guide member 70 similar to that shown in the embodiment of FIGS. 7 and 8, and the top plate 9 is provided as an installation stand. A flat guided member 100 is placed on the guide member 70, and the sliding groove of the guided member 100 is fitted to the guide rail of the guide member 70 as in the embodiment of FIGS. The guided member is slidable in the front-rear direction.

  As shown in the figure, support members 120 that rotatably support the musical score plate 110 are provided at both ends in the width direction of the guided member 100. The support member 120 is inclined so that the front surface 121 is flush with the front surface of the standing musical score plate. The side surfaces where the support members 120 face each other constitute a rotation support portion that receives the shaft 111 of the music plate 110 and supports it in a rotatable manner, and allows the music score plate to fall freely. The back surface 122 of the support member 120 is an arc surface centered on the axis 111 of the music score plate 110.

  The musical score plate 110 is notched so that both ends at the lower end receive the support member 120, and a small columnar moving member 131 extends downward from the upper end surface of the notch.

  A guide groove 132 for guiding the moving member 131 is formed on the back surface 122 of the support member 120. The guide groove 132 has a standing path 132a that guides the moving member 131 when rotating in the direction in which the musical score plate 110 is raised, and a lying down path 132b that guides the moving member 131 when rotating in the direction in which the musical score plate is tilted. And a holding path 132c for receiving the moving member 131 so as to hold the music board in an upright state, which is formed near the end of the music board standing side between the standing path 132a and the lying down path 132b. . The standing side end of the standing path 132a is connected to the holding path 132c by a first communication path 132d extending in a direction crossing the standing path. The standing side end of the holding path 132c is located on the standing side with respect to the first connection path 132d, and is connected to the lodging path 132b by a second connection path 132e extending in a direction crossing the holding path 132c. Further, the standing path 132a and the lodging path 132b are connected to each other at the lodging side portion.

  Further, leaf springs 133 and 134 are attached to the side surfaces where the pair of support members 120 face each other. A leaf spring 133 is attached to one support member 120 (on the right side in the figure) on the front side of the side surface. The leaf spring 133 is in contact with the side surface of the notch of the musical score plate and presses the musical score plate 110 toward the other support member 120 when the musical score plate 110 is in the standing state. In order to make the contact with the side surface of the musical score plate notch smooth, the leaf spring 133 is inclined so as to gradually separate from the side surface of the support member 120 from the lying side to the standing side of the musical score plate. As a result of this pressing, the moving member 131 moves to the holding path 132c via the first connection path 132d when it is positioned at the standing side end of the standing path 132a, along with the movement of the musical score plate. When it is located at the installation side end portion, it moves to the lodging pass 132b through the second communication path 132e.

  A leaf spring 134 is attached to the other support member 120 (left side in the figure) near the back surface of the side surface. The leaf spring 134 is in contact with the side surface of the notch of the musical score plate and presses the musical score plate 110 toward the support member 120 on the opposite side when the musical score plate 110 is in a lying state. In order to make the contact with the side surface of the musical score plate notch smooth, the leaf spring 134 is also inclined so as to gradually move away from the side surface of the support member 120 from the standing side of the musical score plate toward the lodging side. By this pressing, when the moving member 131 is located at the connection point between the standing path 132a and the lying path 132b, the moving member is allowed to move from the lying path 132b to the standing path 132a and is prevented from moving in the reverse direction. Direction restricting means is formed.

  In this manner, the moving member 131, the guide groove 132, and the leaf springs 133 and 134 constitute a lock mechanism 130 that holds the musical score plate in an upright state and can release the holding.

  In order to use the music stand device 30b, first, the musical score plate 110 in a lying state may be raised by hand and rotated to the standing position. As a result, when the moving member 112 moves together with the music score plate and reaches the standing side end of the standing path 132a of the guide groove 132, the leaf spring 133 acts to reach the holding path 132c via the first connection path 132d. . Here, when the hand is released, the moving member 131 moves to the lower end of the holding path 132c due to the weight of the music plate 110. Thereby, the standing state is stably maintained. Next, when the music board 110 is tilted, it is rotated again in the direction of raising the music board. As a result, the moving member 131 also moves and reaches the upper end portion of the holding path 132c, and by the action of the leaf spring 133 again, reaches the lodging path 132b via the second connection path 132e. When the musical score board 110 is tilted, the moving member 131 moves down the lodging path 132b. When the musical score board 110 reaches the fallen state, the moving member 131 reaches the lower end of the fallen path 132b. At this position, the moving member receives a biasing force toward the standing path 132a via the music score plate 110 by the action of the leaf spring 134. Therefore, when the musical score plate 110 is rotated again to be raised, the moving member 131 reliably follows the standing path 132a.

  Since the music board 110 is slidable in the front-rear direction together with the guided member 100, the music board is moved backward from the rear end of the top board 9 when lying down by pulling forward in the lying state as in the above-described embodiment. It is possible to avoid projecting to.

  In this embodiment, the leaf spring can be provided on the side surface of the notch portion of the musical score plate 110 instead of the support member 121. Moreover, the structure using various elastic members, such as the combination of the contact member and coil spring which have the same inclination as a leaf | plate spring, is employable. Furthermore, the direction restricting means constituted by the leaf spring 134 can employ various means instead of this. For example, the direction control means is attached to the guide groove 132 at a location from the lying down path 132b to the standing path 132a and bends to the standing path side to pass the moving member 131, but moves with the bending in the reverse direction being restricted. The member 131 may be configured by a leaf spring piece that prevents the member 131 from entering the lying path 132b from the standing path 132a.

  FIG. 10 shows still another example of the music stand device according to the present invention. The music stand device 30c is mounted on a guided member 100 guided by a guide member (not shown) similar to the embodiment of FIG. As shown in FIG. 10A, the musical score plate 150 has a flat plate shape, and a lower end portion is attached to the guided member 100 so as to be rotatable in the front-rear direction by a hinge 151 that is a rotation support portion.

  A pair of sandwiching plates 161 are provided upright in the center of the back surface of the music score plate 150, and a support bar 163 sandwiched between the sandwiching plates 161 is supported by a pin 162 so as to be rotatable in the vertical direction. Yes.

  On the guided member 100 that supports the musical score plate 150, a flat plate-like support member 170 is horizontally attached. A guide groove 171 for guiding the lower end portion of the support bar 163 is formed on the upper surface of the support member 170. As shown in FIG. 10 (b), a retaining ring 164 is fitted to the lower end of the support bar 163. The guide groove 171 has a width that allows the lower part to receive the retaining ring 164, and an upper part that supports the support bar. The width is slightly wider than 163, and the lower end of the support bar 163 is held in the groove. Therefore, the support bar 163 functions as a moving member that moves in the guide groove. The guide groove 171 includes a standing path 171a that guides the support bar 163 when rotating in the direction in which the musical score plate 150 is raised, and an overturn path 171b that guides the support bar 163 when rotating in the direction of tilting the musical score plate. And a holding path 171c that is formed in the vicinity of the end portion on the musical score plate standing side between the standing path 171a and the lying down path 171b and that receives the support bar 163 so as to hold the musical score plate in the standing state. . The standing side end of the standing path 171a is connected to the holding path 171c by a first communication path 171d extending in a direction crossing the standing path. The standing side end of the holding path 171c is located on the standing side with respect to the first connection path 171d, and communicates with the lodging path 171b by a second connection path 171e extending in a direction crossing the holding path. Further, the standing path 171a and the lodging path 171b are connected to each other at the lodging side portion.

  The support member 170 is attached to the guided member 100 so as to be rotatable about a vertical axis by a shaft 172 that extends vertically and reaches the guided member 100. The support member 170 is given a biasing force so as to rotate the support member toward the first communication path when viewed from the second connection path. In this embodiment, the leaf springs 173a and 173b are arranged on the side of the support member 170 near the holding path and on the side of the supporting member 170 near the holding path and the part of the side wall near the standing path 171a near the connecting path. Each is fixed to the guided member 100 and presses the support member 170.

  As a result, the support bar 163 moves to the holding path 171c via the first connection path 171d when it is positioned at the standing side end of the standing path 171a along with the movement of the musical score plate, and the standing path 171c is set up. When it is located at the side end, it moves to the lodging pass 171b via the second communication path 171e. Further, since the support member 170 tries to rotate clockwise in the drawing by the leaf springs 173a and 173b, when the support bar 163 is at the connection point between the standing path 171a and the fall path 171b, the fall of the moving member Movement from the path 171b to the standing path 171a is allowed and movement in the reverse direction is prevented, thereby forming a direction limiting means.

  In this manner, the support bar 163, the support member 170, the guide groove 171 thereof, the shaft 172, and the leaf springs 173a and 173b constitute a lock mechanism 160 that holds the musical score plate in an upright state and can release the hold. doing.

  In order to use the music stand device 30c, first, the musical score plate 150 in a lying state is raised by hand and rotated to the standing position. As a result, when the support bar 163 moves together with the music score plate and reaches the standing side end of the standing path 132a of the guide groove 171, the leaf spring acts to reach the holding path 171c via the first connection path 171d. Here, when the hand is released, the support bar 163 moves the support bar 163 to the rear end of the holding path 171c by the weight of the music plate 150. Thereby, the standing state is stably maintained. Next, when the musical score plate 150 is tilted, it is rotated again in the direction of raising the musical score plate. As a result, the support rod 163 also moves and reaches the front end of the holding path 171c, and again reaches the lodging path 171b via the second connection path 171e by the action of the leaf spring. When the musical score plate 150 is tilted, the support bar 163 moves backward on the lodging path 171b. When the musical score plate 150 reaches the fallen state, the support bar 163 reaches the rear end of the fallen path 171b. At this position, the support member 170 receives a biasing force to move the standing path 171a toward the support bar 163 by the action of the leaf spring. Therefore, when the music board 110 is rotated again to raise, the support bar 163 reliably follows the standing path 171a.

  Since the musical score plate 150 is slidable in the front-rear direction together with the guided member 100, the musical score plate is moved backward from the rear end of the top plate 9 when lying down by pulling forward in the lying state as in the above-described embodiment. It is possible to avoid projecting to.

  In this embodiment, the leaf spring can be provided at one place or three or more places of the support member 170. Moreover, it can replace with a leaf | plate spring and can use various elastic members, such as a coil spring. Further, various means can be adopted as the direction limiting means configured using the urging force of the leaf spring instead. For example, the direction control means is attached to a portion of the guide groove 171 from the lodging path 171b to the standing path 171a and bends to the standing path side to pass the support bar 163, but is supported by limiting the bending in the reverse direction. The bar 163 may be configured by a leaf spring piece that prevents the rod 163 from entering the lying path 171b from the standing path 171a.

  In each of the above embodiments, the lock mechanism, that is, when the musical score plate reaches the standing state, the musical member is held in the standing state by bringing the moving member to the holding position, and the musical score plate is After turning in the standing direction from the standing state, when focusing on the mechanism that allows the music plate to fall down by removing the moving member from the holding position when tilting to the original side, the guide member and guided member should be It can be omitted, and the musical score board can be directly mounted on an installation table such as a top board with the musical score board fixed in the front-rear direction.

It is a vertical side view which shows roughly the keyboard instrument which has the music stand apparatus which concerns on one Embodiment of this invention. It is a vertical side view mainly showing the music stand device of the keyboard instrument of FIG. It is a top view which shows centering on the music stand apparatus of the keyboard musical instrument of FIG. It is sectional drawing which follows the IV-IV line of FIG. It is explanatory drawing which shows the detail of the principal part of the music stand apparatus shown in FIG. 1 with the operation | movement. It is explanatory drawing which shows order for operation | movement of the music stand apparatus shown in FIG. It is explanatory drawing which shows order for operation | movement of the music stand apparatus shown in FIG. It is explanatory drawing which shows order for operation | movement of the music stand apparatus shown in FIG. It is explanatory drawing which shows order for operation | movement of the music stand apparatus shown in FIG. It is explanatory drawing which shows order for operation | movement of the music stand apparatus shown in FIG. It is explanatory drawing which shows order for operation | movement of the music stand apparatus shown in FIG. It is explanatory drawing which shows order for operation | movement of the music stand apparatus shown in FIG. It is a side view which shows the music stand apparatus which concerns on other embodiment of this invention in the music board standing state. It is a side view which shows the music stand apparatus shown in FIG. It is a perspective view which shows the music stand apparatus which concerns on other embodiment of this invention in the music board standing state. It is a perspective view which shows the music stand apparatus which concerns on other embodiment of this invention in the music board standing state.

Explanation of symbols

1: Electronic keyboard instrument 2: Keyboard lid 9: Top plate (installation stand) 30, 30a, 30b, 30c: Music stand device 31, 70: Guide member 32, 80, 100: Guide member 40 110, 150: Musical plate, 41: Mounting member, 50, 44, 111, 151: Rotating support part, 51: Shaft part, 52: Receiving part, 60, 90, 130, 160: Lock mechanism, 61, 91 131, 163: moving member, 63: compression spring (elastic member), 64: temporary fixing member, 64a: holding portion, 64b: detaching portion, 66: restraining member, 66a: abutting portion, 66b: recessed portion, 67: Pressing part, 132, 171: Guide groove, 120, 170: Support member, 132a, 171a: Standing path, 132b, 171b: Lodging path, 132c, 171c: Holding path

Claims (5)

A music stand device in which a music board is provided on an installation stand so as to fall freely.
A guide member that is fixed to the installation base and extends in a direction toward and away from the user;
A guided member that supports the musical score plate, slides while being guided by the guide member, and is capable of moving forward toward the user and retreating away from the user;
A rotation support portion that rotatably supports the musical score plate so as to be freely tilted;
A music stand device comprising a lock mechanism that holds the music plate in an upright state and can release the holding.   The rotation support part includes a shaft part serving as a rotation center and a receiving part that receives and supports the shaft part as a rotation support part constituting member, and the shaft part and the reception part are provided on the installation base. One of the musical score plates and the other of the musical score plates are attached to and disengaged from each other, and among the rotation support portion constituting members, the rotation support portion constituting members provided on the installation base are When the musical score plate moves to the sliding end on the side away from the user, the musical score plate engages with the rotation support portion constituting member provided on the musical score plate and rotates the musical score plate with the guided member fixed. The music stand device according to claim 1, wherein the music stand device is arranged to be movable.   The lock mechanism includes a holding member that holds the music plate in an upright state and a movable member that can move to a position separated from the holding position, and the music plate is in a range from a lying state to a standing state. The musical score plate is held in the standing position by setting the movable member to a position deviating from the holding position and bringing the movable member to the holding position when the musical score plate reaches the standing position. 3. The music board can be laid down by removing the moving member from the holding position when the sheet is further tilted to the original side after being turned in the standing direction from the standing state. The music stand device described. The locking mechanism is
The moving member supported to be able to reciprocate on the installation base in a state of receiving an urging force directed to the holding position by an elastic member;
Provided on the musical score plate, when the shaft portion and the receiving portion are engaged, when the musical score plate is in the range from the lying down state to the standing state, the moving member abuts against the urging force. The moving member that holds the position of the moving member and the moving member that moves forward in accordance with the urging force when the musical score plate is in a standing state and moves away from the contacting portion according to the urging force. A restraining member having a recessed portion that is supported and restrains the fall of the music plate;
A pressing portion that is provided on the musical score plate and retreats the moving member from the holding position against the urging force of the elastic member when the musical score plate is further rotated from the standing state in a direction to stand up;
A detachable part at the front part and a temporary fixing member provided with a holding part at the rear part;
The holding portion is engaged with the moving member that has been retracted from the holding position by the pressing portion and has come out of the recessed portion of the stop member to hold the moving member, and the detaching portion is In the middle of the musical score plate from the standing state to the lying state, the temporary fixing member is moved against the urging force by contacting a part of the musical score plate so that the holding portion is disengaged from the movable member. The music stand device according to claim 3, wherein the music stand device is provided. The locking mechanism is
A support member for supporting the musical score plate, a guide groove provided on the support member and having a plurality of paths,
A movable member coupled to the musical score plate, engaged with the path, and movable within the path;
The guide groove includes a standing path that guides the moving member when the musical score plate is erected, a lodging path that guides the moving member when lying down, and a holding path provided between the two paths, and the moving member is Formed to circulate along the guide groove,
The guide groove receives the moving member in the holding path by holding the music board slightly from the standing side to the lying side, holds the music board in the standing state, and rotates the music board again to the standing side. The music stand apparatus according to claim 1, wherein the music plate is configured to be able to fall by moving the moving member from the holding path to the lodging path.

Images