JP2000050996A - Chair and turntable therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sit down on a rotation blocked seat body and further to rotate the seat body through the simple operation of just manipulating an operating lever. SOLUTION: This rotary means of a seat body 2 supported by a leg body 1 so as to be rotated is provided with a turntable 3 having leg body side and seat body side members 31 and 32 and a sliding member 33 interposed between them. Then, the leg body side member 31 is provided with plural rotation stopping parts 40 at prescribed intervals in th rotating direction of the seat body side member 32, and the seat body side member 32 is provided with an operating lever 42, which has en engage part 41 capable of being engaged/disengaged with the rotation stopping part 40, so as to swing it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair whose seat can be rotated with respect to a leg, and a turntable used for the chair.

[0002]

2. Description of the Related Art In a chair, a seat body is provided rotatably on a leg body with a rolling wheel, and the seat body is integrated with a moving type mainly used for office work and a leg body without a rolling wheel. The stationary type, which is mainly used for a table, and the rotating type, which is mainly used for learning, in which a seat body is provided rotatably on a leg that does not have a rolling wheel. Is generally known.

[0003]

The moving type is easy to move the whole chair, and the rotating type is easy to rotate the seat, so that there are many opportunities to move the body.
Although it is convenient as a chair for learning, there is a problem that the body is not stable as a chair for a dining table and a meal or the like cannot be performed in a calm mood. Accordingly, stationary chairs are generally used as chairs for dining tables. When sitting on this stationary type of chair and eating, the knees will enter the lower area of the table, so when sitting, sit down at a position lower than the table and then move the chair closer to the table When the person leaves after finishing a meal, an operation for lowering the table back is required. For this reason, especially when a physically handicapped person uses a stationary type chair, it is difficult to perform sitting and leaving operations.

The present invention has been made in view of the above circumstances, and has a rotating table for rotating a seat, and one of a leg-side member and a seat-side member of the rotating table has a rotation stopper. Is provided, and the other is provided with an operation lever capable of engaging / disengaging with the rotation stopping portion, so that the user can sit on the seat body whose rotation has been prevented, and furthermore, is simple enough to operate the operation lever. An object of the present invention is to provide a chair and a turntable for a chair that can rotate a seat body by an operation. Further, by providing a pair of grips disposed on both sides of the seat at the other end of the operation lever, even when one of the left hand and the right hand is inconvenient, the seat can be seated in a natural posture. It is an object of the present invention to provide a chair and a turntable for a chair that can be rotated.

[0005]

The chair according to the first aspect of the present invention comprises:
In a chair whose seat is rotatably supported on its legs,
The rotation means of the seat body, the leg side member and the seat body side member,
A rotary table having a sliding member interposed therebetween; a plurality of rotation stoppers being provided on the leg side member at predetermined intervals in a rotation direction of the seat side member; An operation lever capable of engaging / disengaging with the rotation stopper is provided on the body side member so as to be movable.

A chair turntable according to a seventh aspect of the present invention comprises a leg-side member and a seat-side member, and a sliding member interposed between the leg-side member and the seat-side member. Are provided at predetermined intervals in the rotation direction of the seat-side member, and an operation lever capable of engaging / disengaging with the rotation stopper is movably provided on the seat-side member.

In the first invention and the seventh invention, the rotation of the seat-side member can be prevented by engaging the operation lever with the rotation stopper, and the operation can be prevented by operating the operation lever. Since the lever can be disengaged from the rotation stopper and the seat body can be rotated, even in the case of a physically handicapped person, it can be operated simply by moving one hand and operating the operation lever. The seat can be rotated to a required angle to seat and unseat, and the burden on the user can be reduced. In addition, when the seat is seated, the rotation of the seat can be reliably prevented, and You can eat meals and so on.

In the chair according to the second invention and the turntable for a chair according to the eighth invention, the operating lever is provided at one end thereof with an engaging portion capable of engaging / disengaging with the rotation stopping portion. The intermediate portion is pivotally supported via a lever shaft extending along the rotation range of the seat body side member.

According to the second and eighth aspects of the present invention, the seat body side member and the seat body are rotated and stopped by a simple operation of pushing the operation lever downward or pulling the operation lever upward. In addition, since the force applied to the operation lever can be reduced, the burden on the user can be further reduced.

In the chair according to the third invention and the turntable for a chair according to the ninth invention, the leg side member is made of a metal plate,
A plurality of mounting seats projecting in the vicinity of the peripheral edge to the opposite side to the seat-side member, and having a mounting hole for the leg are formed at the protruding portion, and the rotation stopper is provided on the peripheral edge between the mounting seats. Are provided by notches, and the engaging portion is a protrusion.

According to the third and ninth aspects of the present invention, the mounting seat, the mounting hole, and the rotation stopper of the leg side member can be easily formed by molding and can be provided at low cost, and the mounting seat is provided. As a result, the engagement area between the engagement portion and the rotation stopping portion can be lengthened, so that it is possible to satisfactorily prevent the seat body from rotating carelessly when the operation lever is not operated by a required operation amount. Also, since the mounting seat protruding to the opposite side to the seat body side member is provided, the leg side member can be mounted on the leg body without being obstructed by the seat body side member.

In a chair according to a fourth aspect of the present invention, the operation lever has an engagement portion at one end portion capable of engaging with and disengaging from the rotation stopping portion, and the other end portion on both sides of the seat body. It is characterized in that a grip portion to be arranged is provided.

According to a tenth aspect of the present invention, in the chair turntable, the operation lever has an engagement portion at one end portion capable of engaging with and disengaging from the rotation stopper portion, and the other end portion has the seat body side. It is characterized in that gripping parts are provided on both sides of the member.

According to the fourth and tenth aspects of the present invention, since the operating lever can be operated on both sides of the seated body, even if one of the left hand and the right hand is inconvenient, the seated natural body can be operated. The seat can be easily rotated in the posture.

In the chair according to the fifth invention and the turntable for a chair according to the eleventh invention, the operation lever has a pair of other ends branched from a middle portion in a longitudinal direction.

In the fifth and eleventh aspects of the present invention, since the operating lever has a pair of other ends branched from the middle in the longitudinal direction, the operating lever has a structure as compared with the case where two operating levers are used. It can be simplified and cost can be reduced.

According to a sixth aspect of the present invention, in the chair, the operation lever has the engaging portion, and one end side member urged in a direction to be engaged with the rotation stopping portion by urging means; The other end side member having a grip portion disposed on both sides of the is separate body, the other end side member presses the one end side member by operating the grip portion, the one end side member It is characterized in that a pressing body for moving in a direction in which the engaging portion is disengaged is provided.

According to a twelfth aspect of the present invention, there is provided a chair turntable, wherein the operation lever has the engaging portion, and one end side member urged in a direction to be engaged with the rotation stopping portion by urging means;
The other end side member having grip portions disposed on both sides of the seat body side member is a separate body, and the other end side member presses the one end side member by operating the grip portion. A pressing body for moving the side member in a direction in which the engaging portion is disengaged is provided.

According to the sixth and twelfth aspects of the present invention, even if the chairs are of different types or of the same type but of different sizes, the other end member can be replaced without replacing the entire operation lever. By exchanging, the grip portion of the operation lever can be arranged at a position suitable for the chair, and the cost of the operation lever and, consequently, the overall cost can be reduced.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings showing the embodiments. Embodiment 1 FIG. 1 is an enlarged longitudinal sectional front view of a main part of a chair according to the present invention, FIG.
3 is a bottom view of only the turntable, FIG. 3 is a plan view of only the turntable, FIG. 4 is a front view of only the turntable, FIG. 5 is an enlarged cross-sectional view taken along line XX of FIG. 3, and FIG. It is.

This chair comprises a leg 1 having four legs 11... Arranged at four corners in plan view and a square connecting portion 12 connecting the upper ends thereof, and the connecting portion. Body 2 having a quadrangular seat portion 21 in plan view opposed to the rear portion 12 and a backrest portion 22 extending upward from one side thereof.
Between the leg 1 and the seat 2, the seat 2
And a turntable 3 for rotatably supporting the base 1 on the leg 1.

The turntable 3 includes a leg-side member 31 and a seat-side member 32 which are formed of a metal plate and have a substantially rectangular shape in a plan view, and a plurality of sliding members 33 interposed therebetween. The leg-side member 31 and the seat-side member 32 are provided with through holes 31a, 32a at the center and annular concave portions 31b, 32b at the peripheral edge and the intermediate portion, respectively, and a ball is provided between the annular concave portions 31b, 32b. The rotation of the seat body side member 32 is enhanced by interposing the sliding member 33 using a rolling element such as the above.

A shaft 34 having a flange at one end is inserted through the through-holes 31a and 32a from the side of the seat-side member 32, and a seat plate 35 and a rolling element retainer 36 are inserted and supported at the other end. A plurality of rolling elements 37 are interposed between the seat plate 35 and the rolling element retainer 36 and the other end of the shaft body 34 is swaged to connect the leg side member 31 and the seat body side member 32, and The rotation of the seat body side member 32 is prevented from lowering due to the rotation of the seat body side member 32, and the rotation performance of the seat body side member 32 can be further enhanced.

The leg side member 31 and the seat side member 32
In the peripheral edge portion, the opposing interval is wider than the opposing interval on the center side, and mounting holes 31c, 32c are provided at four corners of the leg-side member 31 and the seat-side member 32, and these mounting holes 31c,
The leg-side member 31 and the seat-side member 32 are detachably attached to the connecting portion 12 and the seat portion 21 by attachment screws 38 and 39 inserted through 32c. A mounting seat 31e is formed at a corner of the leg-side member 31 so as to protrude in a direction opposite to the seat-side member, and the mounting hole 31c is formed in a protruding portion of the mounting seat 31e.

The four sides of the periphery of the leg side member 31 are provided with concave rotation stoppers 40 with a phase difference of about 90 ° by notches.

On one side of the seat body side member 32, a lever support piece 32d having a substantially U-shaped cross section is protrudingly provided.
An intermediate portion of an operation lever 42 having a protruding engagement portion 41 capable of engagement / disengagement with zero is provided in a thickness direction of the seat-side member 32 via a lever shaft 43 extending along a rotation range of the seat-side member. The operation lever 42 is swingably mounted.
There is provided an urging member 44 using a linear spring for urging the engaging portion 41 in a direction in which the engaging portion 41 always engages with the rotation stopping portion 40. Further, a lever guide piece 32e is formed at the base end of the lever support piece 32d by cutting and raising, and guides the operation lever 42 that swings by a downward pressing operation, thereby forming the engagement portion 41. Engagement / disengagement with the rotation stopper 40 can be performed well.

The operation lever 42 is connected to the lever support piece 32.
and a lever main body 42a having an engagement portion 41 at one end thereof, and an operating portion 42 connected to the other end of the lever main body 42a.
b, the other end of the lever main body 42a is attached to the lever shaft 43, and the engaging portion 41 side portion is located within the opposing interval in the outer peripheral portion of the leg side member 31 and the seat side member 32. It can be operated.

In FIG. 1, reference numeral 45 denotes a closing ring made of a synthetic resin for closing a gap between the leg-side member 31 and the seat-side member 32.

In the chair configured as described above, the turntable 3 is formed by the mounting screw 38 inserted through the mounting hole 31c of the leg side member 31 and the mounting screw 39 inserted through the mounting hole 32c of the seat side member 32. It is attached to the leg 1 and the seat 2. In this case, since the mounting hole 31c is provided in the mounting seat 31e protruding to the opposite side to the seat body side member 32, the head of the mounting screw 38 is disposed in the inner concave portion of the mounting seat 31e, so that the leg side is provided. The member 31 can be attached to the leg 1 without being disturbed by the seat-side member 32. Further, since the operating lever 42 is urged in the direction of the seat body side member 32 by the urging member 44 and the engaging portion 41 is always engaged with the rotation stopping portion 40, the rotation of the seat body 2 is reliably prevented. Have been.

For example, when a person with a physical disability is used as a table chair, for example, the backrest 22 is arranged so as to intersect with the table in a normal state in which the backrest 22 faces the table. 2, the user grips the operating portion 42b of the operating lever 42 and pushes the operating portion 42b downward.
The operation lever 42 swings, and the rotation stopping portion 4 of the engagement portion 41 is rotated.
0 is disengaged, and the seat 2 becomes rotatable. Accordingly, the user operates the operation lever 42 in a seated state to move the body 9
Just by moving it by 0 °, the seat body 2 provided with the operation lever 42 rotates, and the knee can be put in the lower area of the dining table to take a posture for eating. By removing the operation lever 42 in this state, the operation lever 42 swings by the force of the urging member 44, and the engagement portion 41 engages with the rotation stopper 40 having a phase difference of 90 °. The rotation of the seat 2 is prevented. Therefore, it is possible to eat with a calm mood with the seat 2 fixed.

When the user leaves after finishing the meal, the operation lever 42 is swung by grasping the operation portion 42b of the operation lever 42 and pushing it downward, whereby the rotation stop portion 40 of the engagement portion 41 is rotated. Is disengaged, and the seat body 2 becomes rotatable. Accordingly, the seat 2 can be rotated only by operating the operation lever 42 and moving the body by 90 ° in a seated state, and the knees can be brought out of the lower area of the dining table to be in the outgoing posture. By removing the operation lever 42 in this state, the operation lever 42 swings by the force of the urging member 44, and the engagement portion 41 engages with the rotation stopper 40 having a phase difference of 90 °. The rotation of the seat 2 is prevented. Therefore, it is possible to safely leave the seat 2 in a fixed state. The leg-side member 31 provided with the rotation stopper 40 has a mounting seat 3 protruding to the opposite side to the seat-side member 32.
Since 1e is provided, the engagement area between the engagement portion 41 and the rotation stopping portion 40 can be lengthened, and the seat body 2 rotates carelessly when the operation lever 42 is not operated by a required operation amount. Can be satisfactorily prevented. The leg side member 31 includes an annular concave portion 31b, a mounting hole 31c, and a mounting seat 31.
Since e and the rotation stopper 40 can be easily formed by molding, they can be provided at low cost.

Embodiment 2 FIG. 7 is an enlarged vertical sectional front view of a main part of a chair according to the present invention, and FIG.
Is a bottom view of the turntable for the chair. In this chair, instead of the operation lever 42 being pivotally supported by the lever shaft 43 to be swingable, the operation lever 42 is configured to be slidable, and the operation lever 42 is moved by a sliding operation in the sliding direction. The joining portion 41 can be engaged / disengaged from the rotation stopping portion 40. Other configurations and operations are the same as those of the first embodiment shown in FIGS. The same reference numerals are given to the components, and the detailed description and operation thereof will be omitted.

Operation lever 42 according to the second embodiment
Is to make the shaft hole 42c through which the lever shaft 43 is inserted into an elongated hole, and to allow sliding along this shaft hole.
Further, an urging member 44 using a coil spring for urging the operation lever 42 to one side in the sliding direction is provided.

Embodiment 3 FIG. 9 is a perspective view of a chair, FIG. 10 is a plan view of a turntable for a chair,
FIG. 11 is an enlarged vertical sectional front view of a main part of the chair, and FIG. 12 is a front view of a chair turntable. In this chair, instead of arranging a grip portion (operation portion) 42b provided at the other end of the operation lever 42 on one of the one side and the other side of the seat 2, the operation lever 4 is provided.
2 is provided with a pair of other ends, a pair of other ends provided with gripping portions 42b arranged on both sides of the seat 2, and the operation lever 42 is operated on both sides of the seat 2 seated. Since the other components and operations are the same as those of the first embodiment, the same reference numerals are given to the common components, and the detailed description and operations thereof will be omitted.

Operation lever 42 in the third embodiment
Is an end member 4a having the lever body 42a,
The lever body 42a is separated from the other end member 4b having the grip portion 42b, and the lever body 42a is the same as that of the first embodiment.

The other end-side member 4b includes a first rod portion 46a extending in a direction intersecting the longitudinal direction of the lever body 42a, and a pair of second rods bent at right angles from both ends of the first rod portion 46a in the same direction. The first rod portion 46a and a pressing body 46c extending along the lever body 42a from the longitudinal center of the first rod portion 46a;
46b is a grip portion 42b.

The other end side member 4b rotatably supports a portion of the first rod portion 46a in the vicinity of the pressing body on an opposing wall of the lever support piece 32d having a substantially U-shaped cross section. The grips 42b, 42b are arranged on both sides of the seat 2, and the pressing body 46c is arranged below the lever body 42a,
The tip of the pressing body 46c is brought into contact with the lower surface of the lever body 42a to prevent the other end side member 4b from rotating freely. The other end member 4b is divided at the center in the longitudinal direction, and the divided end portion is inserted into a through hole provided in the lever support piece 32d.
c is integrated by a joining means such as welding.

In the third embodiment, since the grips 42b are disposed on both sides of the seat 2, the user holds the seat 2 and holds the left grip 42b or the right grip 42b of the operation lever 42.
Is gripped and pulled upward, the other end side member 4b swings, and the pressing body 46c pushes the lever body 42a upward, the lever body 42a swings, and the engaging portion 41 is disengaged from the rotation stopper 40, and the seat body 2 becomes rotatable. As described above, since the operation lever 42 can be operated on both sides of the seat body 2 seated, even when one of the left hand and the right hand is inconvenient, the seat body 2 can be easily rotated in a natural sitting posture. Can be done.

In the third embodiment, instead of rotatably supporting the other end side member 4b on the seat body 2, it is slidable as in the second embodiment, and the grips disposed on both sides of the seat body 2 are provided. The contact position of the pressing body 46c with the one end side member 4a is changed by pushing and pulling the portions 42b, 42b, the lever body 42a is swung, and the engaging portion 41 is rotated by the rotation stopping portion 40.
May be configured to be engaged / disengaged.

Fourth Embodiment FIG. 13 is a bottom view of a turntable for a chair. In this chair, in a configuration in which the gripping portions 42b of the operation lever 42 are arranged on both sides of the seat body 2, instead of separating the operation lever 42 into the one end member 4a and the other end member 4b, the other end is attached to the one end member 4a. The end member 4b is joined by joining means such as welding.
Since they are the same as 2 and 3, the same reference numerals are given to the common components, and detailed description and operation thereof will be omitted.

In the fourth embodiment, the operating lever 42 is slidable as in the second embodiment, and the engaging portion 41 is pushed and pulled by the grip portions 42b, 42b arranged on both sides of the seat 2. May be configured to engage / disengage with the rotation stopper 40.

In the first to fourth embodiments described above, the rotation stopper 40 is formed in a concave shape, and the operation lever 42 is provided with the protruding engagement portion 41.
0 may be formed in a projecting shape, and the operating lever 42 may be provided with a concave engaging portion 41. Also, the rotation stopper 40 is about 9
In addition to being provided with a phase difference of 0 °, a plurality may be provided continuously on an arc concentric with the rotation center of the seat body side member 32, or may be provided in a concave or projecting manner at a predetermined interval. The number and shape are not particularly limited.

The chair of the present invention is preferably used especially for a physically handicapped person, but its use is not particularly limited.

[0044]

According to the chair of the first invention and the chair turntable of the seventh invention, the rotation of the seat-side member can be prevented by engaging the operation lever with the rotation stopper. By operating the operation lever, the operation lever can be disengaged from the rotation stopping portion and the seat body can be rotated, so that even when used by a physically handicapped person, one hand can be moved. By simply rotating the seat at a required angle by simply operating the operation lever, the seat can be easily seated and retreated, and the burden on the user can be reduced. Rotation can be reliably prevented, and a meal or the like can be performed in a calm mood.

According to the chair according to the second invention and the chair turntable according to the eighth invention, the operation lever is pushed downward,
Alternatively, the seat body side member and the seat body can be rotated and stopped by a simple operation of merely pulling upward, and the force applied to the operation lever can be reduced, thereby reducing the burden on the user. It can be even smaller.

According to the chair of the third invention and the turntable for the chair of the ninth invention, the mounting seat, the mounting hole and the rotation stopping portion of the leg side member can be easily formed by molding and provided at low cost. Further, by providing the mounting seat, the engagement area between the engagement portion and the rotation stopping portion can be lengthened, so that the seat body rotates carelessly when the operation lever is not operated by a required operation amount. And the mounting seat protruding to the opposite side of the seat-side member is provided, so that the leg-side member can be mounted on the leg without being obstructed by the seat-side member.

According to the chair according to the fourth aspect and the chair turntable according to the tenth aspect, since the operation lever can be operated on both sides of the seated body, one of the left hand and the right hand is inconvenient. Also in this case, the seat body can be easily rotated in a natural posture in which the user sits.

According to the chair of the fifth aspect and the chair turntable of the eleventh aspect, since the operating lever has a pair of other ends branched from the middle in the longitudinal direction, the structure of the operating lever is reduced. This can be performed more easily and cost can be reduced as compared with the case where two are used.

According to the chair according to the sixth aspect of the invention and the chair turntable according to the twelfth aspect of the present invention, the entire operation lever is exchanged even when the chairs are of different types or of the same type but of different sizes. Without replacing the other end member having the grip portion, the grip portion of the operation lever can be arranged at a position suitable for the chair, so that the cost of the operation lever and the overall cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an enlarged vertical sectional front view of a main part showing a first embodiment of a chair according to the present invention.

FIG. 2 is a bottom view showing the first embodiment of the chair swivel according to the present invention.

FIG. 3 is a plan view showing the first embodiment of the chair swivel according to the present invention.

FIG. 4 is a front view showing Embodiment 1 of the chair turntable according to the present invention.

FIG. 5 is an enlarged sectional view taken along line XX of FIG. 3;

FIG. 6 is a perspective view showing Embodiment 1 of the chair according to the present invention.

FIG. 7 is an enlarged longitudinal sectional front view of a main part showing a second embodiment of the chair according to the present invention.

FIG. 8 is a bottom view showing a second embodiment of a chair swivel according to the present invention.

FIG. 9 is a perspective view showing Embodiment 3 of the chair according to the present invention.

FIG. 10 is a plan view showing a third embodiment of a chair swivel according to the present invention.

FIG. 11 is an enlarged vertical sectional front view of a main part showing a third embodiment of the chair according to the present invention.

FIG. 12 is a front view showing a third embodiment of a turntable for a chair according to the present invention.

FIG. 13 is a bottom view showing a fourth embodiment of a turntable for a chair according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Leg 2 Seat 3 Turntable 31 Leg side member 32 Seat side member 33 Sliding member 40 Rotation stop part 41 Engagement part 42 Operation lever 42b Operation part

Claims (12)

[Claims] 1. A chair in which a seat is rotatably supported by a leg, wherein the means for rotating the seat comprises a leg-side member, a seat-side member, and a sliding member interposed therebetween. A plurality of rotation stoppers are provided on the leg-side member at predetermined intervals in the rotation direction of the seat body-side member, and the rotation-stop portion engages with the seat body-side member.
A chair characterized in that a detachable operation lever is movably provided. 2. The operation lever according to claim 1, further comprising an engagement portion provided at one end thereof, the engagement portion being capable of engaging with and disengaging from the rotation stopping portion, and an intermediate portion having a lever shaft extending along a rotation range of the seat-side member. 2. The chair according to claim 1, wherein the chair is pivoted through the arm. 3. The leg-side member is made of a metal plate,
A plurality of mounting seats projecting in the vicinity of the peripheral edge to the opposite side to the seat-side member, and having a mounting hole for the leg are formed at the protruding portion, and the rotation stopper is provided on the peripheral edge between the mounting seats. 3. The chair according to claim 2, wherein the notch is provided by a notch, and the engaging portion is a protrusion. 4. The operating lever has an engaging portion at one end portion capable of engaging with and disengaging from the rotation stopping portion, and a grip portion disposed on both sides of the seat body at the other end portion. 2. The chair according to claim 1, wherein the chair is provided. 5. The chair according to claim 4, wherein the operation lever has a pair of other end portions branched from a middle in a longitudinal direction. 6. The operating lever has the engaging portion,
One end member urged by the urging means in a direction to engage with the rotation stopper is separated from the other end member having grips disposed on both sides of the seat body. 5. The chair according to claim 4, wherein the side member is provided with a pressing body that presses the one end member by operating the grip portion, and moves the one end member in a direction in which the engagement portion is disengaged. 7. A leg-side member and a seat-side member, and a sliding member interposed between the leg-side member and the seat-side member, wherein a plurality of rotation stoppers are provided on the leg-side member in a rotation direction of the seat-side member. A chair turntable, characterized in that an operation lever capable of engaging with and disengaging from the rotation stopper is movably provided on the seat body side member. 8. The operating lever has an engaging portion at one end portion capable of engaging with and disengaging from the rotation stopping portion, and an intermediate portion has a lever shaft extending along a rotation range of the seat-side member. The rotating table for a chair according to claim 7, wherein the rotating table is pivotally supported through a shaft. 9. The leg-side member is made of a metal plate,
A plurality of mounting seats projecting in the vicinity of the peripheral edge to the opposite side to the seat-side member, and having a mounting hole for the leg are formed at the protruding portion, and the rotation stopper is provided on the peripheral edge between the mounting seats. The turntable for a chair according to claim 8, wherein a notch is provided, and the engaging portion is a protrusion. 10. The operating lever has an engaging portion at one end portion capable of engaging with and disengaging from the rotation stopping portion, and a grip portion disposed at both ends of the seat body side member at the other end portion. The turntable for a chair according to claim 7, further comprising: 11. The rotating table for a chair according to claim 10, wherein the operating lever has a pair of other ends branched from a middle portion in a longitudinal direction. 12. The operating lever has the engaging portion, and is disposed on both sides of the one end side member urged in a direction to be engaged with the rotation stopping portion by urging means, and both sides of the seat body side member. The other end member having a grip portion is separate from the other end member, and the other end member presses the one end member by operating the grip portion, and the engaging portion is disengaged from the one end member. 11. A pressing body for moving in a moving direction is provided.
The turntable for the chair described.