JP3179986U - Piano chair. - Google Patents

Abstract

The present invention provides a piano chair that can be adjusted in a stable and quick manner, and that the optimum height adjustment can be performed even when the chair is hung on the chair.
Ball screw rods B1, B2, etc. are arranged along leg portions 2 arranged vertically at the four corners of the chair, and the top ends B5, B6, etc. of the ball screw rods support a seat portion 11 and are fitted to the ball screw rods. 6A, 6B and the like are rotatably supported vertically on the main body 10 of the chair, and timing pulleys 5A, 5B and the like provided on each outer periphery of each of the female screw rings are wound around a timing belt 13 connected to a drive motor M, The piano chair 100 is configured such that the seat portion is moved up and down by the normal rotation / reverse rotation of each female screw ring by the forward / reverse drive of the drive motor.
[Selection] Figure 1

Description

  The present invention relates to a piano chair in which the height of a seat portion can be adjusted, and more particularly to a piano chair in which the height of the chair can be adjusted stably and quickly.

  For example, organ and piano chairs are configured so that the height of the seat can be adjusted by the difference in height and sitting height, because the performer is used by various people from children to adults. Specific examples of this will be introduced. Its configuration is a performance seat position adjustment chair that allows the performer to adjust the position of the seat plate quickly and safely even while playing a musical instrument such as a piano. It has side lock pin operation levers etc. extended in a substantially U shape on both the left and right sides of the chair body, connected to the back lock pin operation lever (upper) that advances and retracts the pin toward the step groove of the lock plate This is a performance seat position adjustment chair (for example, Patent Document 1).

  Another chair is easy to adjust the height, easy to return to the original height with reproducibility, and can easily determine the height of the top. It was. The structure is a height adjustment mechanism for the top plate in which a link mechanism is provided between the top plate and the base, and the height of the top plate is changed by changing the crossing angle of the link mechanism. The lower end of the link is pivotally supported by the base and the upper end is slidably supported by the top plate, and the upper end of the second link is pivotally supported by the top plate and the lower end is based on the base plate. A locking rod that is slidably supported by the base and extends laterally from the vicinity of the upper end of the first link substantially perpendicular to the sliding direction, and engages with the locking rod to restrict sliding of the locking rod. A plurality of locking grooves along the sliding direction of the locking bar, and the locking groove includes a locking piece that detachably engages with the locking bar, the end of the locking bar being a top plate or a base (For example, patent document 2).

  In another piano chair, the seat portion is composed of a box portion and a lid portion that is swingably connected to the box portion via a butterfly plate, and the swingable support piece is a support plate. The tilt angle of the lid can be adjusted by changing the height of engagement (for example, Patent Document 3).

  In addition, the chair with another back is an electric chair that can be tilted backwards and can take an appropriate sitting posture, so that the upper body and the lower body have a comfortable and comfortable sitting state. Electric lift chair to be maintained. The structure is an electric lifting chair that can be lifted and lowered by a lifting part having a seat part and a back part. When the elevating part reaches a predetermined low position, a rearward tilt mechanism is provided for tilting the back part backward. The rear tilt mechanism is a mechanism in which the seat swing center and the back swing center are made different so that the back portion is tilted rearward and the seat portion is tilted backward (for example, Patent Document 4).

  Utility Model Registration No. 3172906   JP 2011-41664 A   JP 2000-262353 A   JP 2005-6899 A

  In the above-described known example, a mechanism in which the lock plate and the step groove are used to raise and lower stepwise is provided, or a link mechanism is provided between the top plate and the base, and the screw rod is rotated and raised continuously. Furthermore, the seat part is a box part that can be swung through a butterfly plate so that the inclination angle with the front side of the seat part lowered can be adjusted, and the lifting part that has the seat part and the back part is raised and lowered. It is a possible electric lift chair. The height adjustment mechanism of the seat part of each chair described above is poor in operability because it is necessary to check the height again after standing up from the chair and re-adjusting each time the height is adjusted. Can't get the exact height position. Even if the seat height adjustment mechanism is electrically operated, the seat is cantilevered and lacks the ability to support the weight applied to the front edge of the seat.

  The present invention has been made in view of the problems of the various chair height adjustment mechanisms. The purpose is to enable the chair height to be adjusted stably and quickly, and the optimal height adjustment can be performed while the performer is hung on the chair. A piano chair that can be adjusted while checking its position on the display is provided.

  In order to achieve the above object, a piano chair according to claim 1 of the present invention has a ball screw rod vertically arranged along legs vertically arranged at four corners of the chair, and the top end of the ball screw rod supports a seat portion. A female screw ring that fits into the chair is vertically supported rotatably on the body of the chair, and a timing pulley provided on each outer periphery of each female screw ring is wound around a driving-side timing pulley of the drive motor by a timing belt. The ball screw rod is moved up and down by the normal rotation and reverse rotation of each female screw ring by normal rotation and reverse rotation driving, and the seat portion is adjusted up and down.

  According to a second aspect of the present invention, there is provided a piano chair according to the first aspect, wherein the drive motor includes a worm reduction gear, and a driving timing pulley is provided on the low-speed rotation shaft. It is characterized by that.

  The piano chair according to claim 3 of the present invention is the piano chair according to claim 1 or 2, wherein the drive motor comprises a storage battery provided in the main body of the chair as a power source, and is normally rotated by a lift switch. Each female screw ring is reversely rotated in the forward and reverse directions, and the ball screw rod is moved up and down, and the height of the seat is slightly moved up and down to stop at an arbitrary position.

  The piano chair according to claim 4 of the present invention is the piano chair according to claim 1 or 2, wherein the drive motor is connected to an external power source such as a 100-volt commercial power source and is rotated forward / reversely by a lift switch. The seat portion is configured to stop at an arbitrary position while slightly raising and lowering the height of the seat portion.

  According to a fifth aspect of the present invention, there is provided a piano chair according to the first aspect, wherein one of the legs vertically arranged at the four corners of the chair in the piano chair according to the first aspect has a display portion indicating a height position of the seat according to height. And a pointer indicating the height position of the seat to the display unit is provided on the lower end side of the ball screw rod arranged vertically inside the leg unit including the display unit.

  According to the piano chair of claim 1, the height adjustment of the seat portion can be stably and quickly moved up and down by the normal rotation and reverse rotation of each female screw ring by the normal rotation and reverse rotation drive of the drive motor. Up and down adjustment is possible. In addition, the height of the seat can be adjusted even when the performer is sitting on the seat, and the height can be finely adjusted to a just fit.

  Further, according to the piano chair of the second aspect, even if the weight of the human body that is a heavy load is applied to the seat portion, the timing of the driving side timing pulley and the female screw ring attached to the low speed rotation shaft of the worm speed reducer Even if the timing belt around which the pulley is wound is pressed by the weight of the human body, it is not reversed, and the deceleration function and the braking force when the seat is moved up and down can be exhibited.

Further, according to the piano chair of claim 3, since the drive motor is powered by the storage battery provided in the main body of the chair, the height of the seat can be adjusted even in a piano classroom or performance venue without a power source. Not only can it be simplified, the height of the seat can be adjusted while the performer is sitting on the seat, and the height can be fine-tuned to a just fit.
Further, according to the piano chair of the fourth aspect, the drive motor is connected to an external power source such as a 100-volt commercial power source, and is normally rotated and reversed by the elevation switch, so that the height of the seat portion is finely moved up and down strongly. However, not only can it be positioned at an arbitrary height position, the height of the seat can be adjusted while the performer is sitting on the seat, and the height can be fine-tuned to just fit.

  In addition, according to the piano chair of claim 5, since the optimum height position can be confirmed on the display unit according to the height before the optimum height adjustment of the seat part is put on the chair, the height of the seat part prior to the piano performance is confirmed. The presence or absence of adjustments can be confirmed, and the optimal height position of the seat by height can be determined, so the piano player's posture is not found in a chair that simply has the function of adjusting the height of the seat. Can be set optimally.

  It is a front sectional view of a piano chair in the first embodiment of the present invention.   In 1st Embodiment of this invention, it is the sectional view on the AA line of a piano chair.   It is a 1st embodiment of the present invention and is a top view of the seat part of a piano chair.   It is a 1st embodiment of the present invention, and is a perspective view of a raising / lowering mechanism of a piano chair.   It is sectional drawing of the raising / lowering effect | action of a piano chair in 1st Embodiment of this invention.   In the 2nd Embodiment of this invention, it is a perspective view of the raising / lowering mechanism of a piano chair.   In 3rd Embodiment of this invention, it is a front view provided with the height display part in the raising / lowering mechanism of the piano chair.

  The piano chair according to the first embodiment of the present invention will be described below with reference to FIGS. Examples will be described below.

  The piano chair 100 of the present invention is configured as shown in FIGS. In a piano chair 100, a main body 10 in which legs 2 are vertically arranged at four corners of a square frame 1, and a support plate 4 having the same shape is fitted inside the square frame 1. Four ball screw rods B1 to B4 are vertically arranged at the four corners of the support plate 4 along the leg portion 2, and the top ends B5 to B8 of the ball screw rod are fixed to the lower surface 11A of the seat portion 11 so that the seat portion is in a horizontal posture. Is supporting. The ball screw rods B1 to B4 are protected by a bellows G, and ball bearings 8A to 8D and thrust bearings 7A, in which female screw rings 6A to 6D having timing pulleys 5A to 5D fitted on the outer circumference are arranged on the lower side. It is vertically supported rotatably on the support plate 4 through ˜7D. Further, as shown in FIGS. 2 and 4, a drive motor M with a worm reduction gear UG is attached to the lower surface of the support plate 4 at a substantially central position, and the low-speed rotating shaft 9 is connected to the support plate 4. The driving side timing pulley 12 is attached to the low-speed rotating shaft 9. Further, two tension pulleys T are arranged on both sides of the driving side timing pulley 12. As a result, the driving timing pulley 12, the timing pulleys 5 </ b> A to 5 </ b> D of the ball screw rods B <b> 1 to B <b> 4, and the tension pulley T are wound around the timing belt 13.

  Thus, timing pulleys 5A to 5D provided on the outer circumferences of the female thread rings 6A to 6D are connected to one drive motor M via a worm speed reducer UG, and the drive motor is rotated in the forward and reverse directions. The seat portion 11 is adjusted up and down by synchronized forward and reverse rotation of each female screw ring by reverse drive. The drive motor M uses a storage battery B0 provided on the lower surface of the support plate 4 in the main body 10 of the piano chair 100 as a power source, and is rotated forward / reversely by the lift switches S1 and S2 to finely move the height of the seat 11. It is configured to stop at an arbitrary position while being raised and lowered. That is, in FIG. 2, when the drive motor M rotates in the forward direction, the timing belt 13 rotates clockwise (in the direction of the solid arrow) to raise the seat 11, and during reverse rotation, the timing belt 13 rotates in the counterclockwise direction (dashed arrow). The seat 11 is moved downward in the direction of. In addition, an external power source such as a 100-volt commercial power source may be provided to provide a charging function for the storage battery B0, and a dual power source system may be used.

The piano chair 100 according to the first embodiment of the present invention is configured as described above, and operates as follows.
First, according to the piano chair 100, as shown in FIGS. 1, 4 and 5, the ball screw rods B1 to B4 are arranged along the leg portions 2 arranged vertically at the four corners of the chair, and the top ends B5 to B8 are The seat 11 is supported. The timing pulleys 5A to 5D provided on the outer circumferences of the female screw rings 6A to 6D fitted to the ball screw rods B1 to B4 are rotationally driven by the timing belt 13 all at once. The forward / reverse drive of the drive motor M obtains high torque by deceleration by the worm speed reducer UG, and each female screw ring is rotated forward / reversely in synchronization by the lift switches S1, S2 to adjust the height of the seat 11 Is stably and quickly moved up or down. Further, the height of the seat can be adjusted even when the performer is sitting on the seat 11, and the fine adjustment of the just fit height can be smoothly performed. Furthermore, in order to finely adjust the raising / lowering stroke of the seat portion 11 within a range that can be fitted to the height and foot length of an infant to an adult, for example, as shown by a solid seat portion 11 and a dashed seat portion 11 ′. In addition, a lifting stroke of about 250 mm (25 centimeters) is set. Of course, the stroke is not limited to the above numerical values, and can be freely changed.

  The piano chair 100 is provided with a drive motor M with a worm reducer UG, so that the worm reducer can be applied even when a heavy load is applied to the seat 11. The ball screw rods B1 to B4 are not reversed by the timing belt around which the driving-side timing pulley attached to the low-speed rotating shaft and the timing pulley of each female screw are wound, and when the seat is moved up and down by the worm reducer UG The deceleration function and the braking force are demonstrated. Furthermore, since the drive motor uses a storage battery in the chair body as a power source, the height of the seat can be simply adjusted even in a piano classroom or performance venue without a power source.

According to the first embodiment, the following actions and effects can be obtained.
First, the height adjustment of the seat portion can be stably and quickly moved up and down by the normal rotation and reverse rotation of each female screw by the normal rotation and reverse rotation drive of the drive motor M, and precise elevation adjustment is possible. In addition, the height of the seat can be adjusted even when the performer is sitting on the seat, and the height can be finely adjusted to a just fit.

  In addition, since the drive motor is equipped with a worm speed reducer, even if the weight of the human body, which is a heavy load, is applied to the seat, the driving side timing pulley attached to the low speed rotating shaft of the worm speed reducer and each The timing belt wound around the timing pulley of the female thread ring is not reversed by being pushed by the weight of the human body, and the deceleration function and the braking force can be exhibited when the seat is moved up and down.

  In addition, since the drive motor is powered by a storage battery in the body of the chair, the height of the seat can be adjusted concisely even in a piano classroom or performance venue where there is no power, The height of the seat can be adjusted even while sitting on the chair, allowing fine adjustment of the height that is just-fit.

  The piano chair 100 according to the first embodiment of the present invention is not limited to the above configuration. That is, the power source of the piano chair 200 shown in FIG. 6 may be used. That is, the drive motor M is connected to an external power source such as a 100-volt commercial power source by a cord C, and is rotated forward and backward by the lift switches S1 and S2, and stopped at an arbitrary position while slightly raising and lowering the height of the seat portion 11. It is configured to do. In other configurations, the storage battery B0 is omitted in order to improve the cost performance of the chair. Other configurations are the same as those of the piano chair 100 according to the first embodiment. Moreover, although the said support plate 4 is comprised by 1 sheet and each components 5A-B0 etc. are attached to this, you may divide | segment for every component.

  With the above configuration, the drive motor M is connected to an external power source such as a 100-volt commercial power source and is rotated forward and reverse by the lift switches S1 and S2, so that the height of the seat portion 11 can be arbitrarily increased while slightly moving up and down. Not only can it be positioned in the vertical position, the height of the seat can be adjusted while the performer is sitting on the seat, and the height can be fine-tuned to a just fit. Further, since the storage battery B0 is unnecessary, the maintenance becomes free.

  The piano chair 100 according to the first embodiment of the present invention is not limited to the above configuration. Like the piano chair 300 according to the third embodiment shown in FIG. 7, a display unit P that displays the optimum height position of the seat according to height is provided. The structure is such that one of the leg portions 2 arranged vertically at the four corners of the chair has a display portion P indicating the height of the seat portion by height (from infants to children, elementary school students, junior high school students, adults, tall adults, etc.). I have. A pointer Q is provided on the lower end side of the ball screw rod B2 which is vertically arranged inside the leg portion 2 provided with the display portion and moves up and down to instruct the display portion P of the height position of the seat portion 11. The above display part P can be used as a specific display method for each height (for infants, children, elementary school students, junior high school students, adults, tall adults, etc.), or for specific height values. You may write it.

  According to the piano chair 300 according to the third embodiment, the optimal height adjustment of the seat portion 11 can be confirmed on the display portion P according to the height before the seat portion 11 is put on the chair 300. It is possible to confirm whether or not the height of the seat portion 11 needs to be adjusted, and since the optimum height position of the seat portion 11 is determined according to the height, only the function of adjusting the height of the seat portion 11 is provided. You can set an optimal posture for piano players who are not in a chair. Moreover, the adjustment range is displayed as an infant at the lowest position 11 'to a child, elementary school student, junior high school student, adult, and the highest position of the seat 11 as a tall adult. Can be adjusted concisely even if there are various height differences.

  Furthermore, the design of the display part P that displays the optimum height position of the seat part can be changed. Specifically, the display portion P having a linear structure is a clock type (dial type) that is displayed with a display needle that decelerates and swivels when the ball screw rod B2 moves up and down, or the amount of elevation movement of the ball screw rod B2 is detected electronically. The height of the seat may be displayed digitally, and this display may also be displayed by physique such as by height (infant, child, elementary school student, junior high school student, adult, tall adult, etc.).

  Although the present invention has been described in the embodiment limited to the piano chair, it is not limited to the piano chair, but can be widely applied to various chairs, for example, children's learning chairs, organ chairs, orchestra members' chairs, etc. Is possible.

DESCRIPTION OF SYMBOLS 1 Square frame 2 Leg part 4 Support plate 5A-5D Timing pulley 6A-6D Female thread ring 7A-7D Thrust bearing 8A-8D Ball bearing 9 Low-speed rotating shaft 10 Main body 11, 11 'Seat part 11A Lower surface 12 Driving side timing pulley 13 Timing belt 100, 200 Piano chair 300 Piano chair B0 Batteries B1-B4 Ball screw rods B5-B8 Top end C Code G Bellows H Through-hole M Drive motor P Display part Q, Q 'Pointer S1, S2 Lift switch T Tension pulley UG Worm reducer

Claims (5)

  A ball screw rod is vertically arranged along the legs vertically arranged at the four corners of the chair, and the top end of the ball screw rod supports the seat portion, and a female screw ring fitted to the ball screw rod is vertically supported by the main body of the chair so as to be rotatable. A timing pulley provided on each outer periphery of each female screw ring is wound around a driving-side timing pulley of the drive motor by a timing belt, and each female screw ring is rotated in the normal rotation / reverse rotation by the forward / reverse drive of the drive motor. A piano chair characterized in that each ball screw rod is moved up and down to adjust the seat.   2. The piano chair according to claim 1, wherein the drive motor includes a worm speed reducer and a driving timing pulley is provided on the low-speed rotation shaft.   The drive motor uses a storage battery provided in the chair body as a power source, and rotates and reverses each female screw ring by rotating forward and backward by a lift switch. 3. The piano chair according to claim 1, wherein the piano chair is stopped at an arbitrary position while being slightly moved up and down.   The drive motor is connected to an external power source such as a 100-volt commercial power source, and is forwardly / reversely rotated by a lift switch to stop at an arbitrary position while slightly raising and lowering the height of the seat portion. Item 3. The piano chair according to item 1 or 2.   One of the legs vertically arranged at the four corners of the chair is provided with a display part indicating the height position of the seat part by height, and the lower end side of the ball screw rod vertically arranged inside the leg part provided with the display part The piano chair according to claim 1, further comprising a pointer for indicating the height position of the seat portion to the display portion.

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