JP2012024373A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair, having a new elevating mechanism, to be precise, allowing a device for making a chair body perform other operations than elevation to be easily disposed under a seat part.SOLUTION: This chair includes: a base part 2 placed on the floor surface; the chair body A provided with the seat part 3 where at least a user is seated; and a rack-pinion elevating mechanism 7 provided between the base part 2 and the chair body A to thereby elevate the chair body A to the base part 2.

Description

  The present invention relates to a chair in which a chair main body having a seat portion on which a user sits can be raised and lowered with respect to a base portion placed on a floor surface.

  DESCRIPTION OF RELATED ART Conventionally, the chair (for example, barbershop chair) which raises / lowers the chair main body which has the seat part which a user seats with respect to the base part mounted in a floor surface is known. As an example of such a chair lifting mechanism, oil is supplied to and discharged from a hydraulic cylinder provided between a base portion and a chair body (for example, Patent Document 1).

JP 2007-151787 A

  However, the chair disclosed in Patent Document 1 requires an oil tank for storing oil and a hydraulic cylinder to which oil is supplied to raise the chair body provided with a seat, and the lifting mechanism is large. There was a problem of becoming. In addition, there is a problem that it is difficult to dispose a device (for example, a reclining device) for causing the chair body to perform another operation below the seat portion.

  Therefore, the present invention has been made to solve such a problem, and an object thereof is to provide a chair having a novel lifting mechanism instead of the lifting mechanism described in Patent Document 1.

The present invention provides a base portion placed on a floor surface, a chair body provided with at least a seat portion on which a user is seated, and provided between the base portion and the chair body. And an elevating mechanism of a rack and pinion system that elevates and lowers the chair body.
By setting it as such a structure, the apparatus (for example, the apparatus which reclines a backrest part, or the apparatus which rotates a footrest up and down etc.) which makes the chair main body other than raising / lowering arrange | positions below a seat part is arrange | positioned. It becomes easy.

The elevating mechanism includes a rack and pinion paired on the left and right sides and a pinion shaft that is a rotating shaft of the paired pinion, and a plurality of combinations of the rack and pinion and the pinion shaft are provided in the front-rear direction. It is preferable to have a set.
Alternatively, the elevating mechanism has a rack and pinion paired in front and rear and a pinion shaft that is a rotation shaft of the paired pinion, and a plurality of combinations of the rack and pinion shaft and the pinion shaft in the left-right direction. It is preferable to have a set.
By setting it as such a structure, when raising / lowering a chair main body, it can prevent that a chair main body rattles back and forth and right and left, and can raise / lower a chair main body stably.

The elevating mechanism includes a motor and a transmission member that transmits the rotational power of the motor to the pinion shaft. The transmission member includes a drive gear that is interlocked with the motor, and a plurality of the pinions. And a driven gear provided on the shaft and rotating in synchronization with the rotation of the drive gear.
With such a configuration, a plurality of pinion shafts can be rotated synchronously by a common motor, and an elevating mechanism can be realized at low cost.

The transmission member includes a first driven gear that meshes with the drive gear, and a second driven gear that meshes with the drive gear via an idle gear and rotates in a direction opposite to the first driven gear. It is preferable.
By adopting such a configuration, the first driven gear and the second driven gear can be rotated in opposite directions to each other. Therefore, the pinion provided on the pinion shaft having the first gear and the pinion having the second gear The pinion provided on the shaft can be meshed with a rack in which the tooth rows are opposite to each other. Further, the distance between both pinions can be increased. Therefore, the chair body can be moved up and down stably while suppressing rattling with respect to the base portion.

Moreover, it is preferable that the said rack is provided so that it may extend in the up-down direction at the said base part side, and the said pinion is rotatably supported via the said pinion axis | shaft at the said chair main body side.
By adopting such a configuration, the pinion (pinion shaft) can be provided near the base part (near the lower end) between the base part and the chair body, and the chair body performs other operations below the seat part. A space for arranging the device can be secured. If a pinion (pinion shaft) is provided on the base part side and a rack is provided on the chair body side, the pinion shaft must be provided near the chair body (near the upper end) between the base part and the chair body. It is difficult to secure a space for arranging devices for performing other operations.

Further, the chair body includes a backrest portion where a user can bend, and a reclining mechanism that is located below the seat portion and above the pinion shaft, and reclines the backrest portion with respect to the seat portion. It is preferable to have.
With such a configuration, the reclining mechanism can be provided without interfering with the lifting mechanism.

Moreover, it is preferable to have an urging member that is interposed between the base portion and the chair main body and urges the chair main body in the direction of raising the chair main body.
By setting it as such a structure, the driving force required in order to raise a chair main body can be supplemented with a biasing member.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes easy to arrange | position the apparatus which performs operation | movement other than raising / lowering to a chair main body between a base part and a chair main body.

It is a perspective view of the chair concerning a 1st embodiment of the present invention. It is a side view of a chair in a non-interlocking state, the chair body is in the lower position, the backrest is upright, and the footrest is lowered. It is a side view of a chair in a non-interlocking state, the chair body is in the lower position, the backrest is tilted, and the footrest is raised. It is a side view of a chair in a non-interlocking state, the chair body is in the upper position, the backrest portion stands and the footrest is lowered. It is a perspective view of a raising / lowering base. It is a perspective view of the main body frame in the chair of a non-interlocking state. It is a perspective view of a footrest link. It is a perspective view which shows the principal part of a raising / lowering mechanism. It is a side view which shows the principal part of a raising / lowering mechanism. It is a side view of a chair in an interlocking state, the chair body is in the lower position, the backrest portion stands and the footrest is lowered. It is a side view of a chair in an interlocking state, the chair body is in the lower position, the backrest is tilted, and the footrest is raised. It is a perspective view of the main body frame in the chair of an interlocking state. It is a perspective view of a rotation base. It is a side view of the chair which concerns on 2nd Embodiment of this invention, and a chair main body is a lower position, Comprising: The backrest part inclines and the footrest has risen.

[overall structure]
Hereinafter, the whole structure of the chair 1 which concerns on 1st Embodiment of this invention is demonstrated.
FIG. 1 is a perspective view of a chair 1 according to the first embodiment of the present invention. FIG. 2 is a side view of the chair 1 in the non-interlocking state, in which the chair body A is in the lower position, the backrest portion 4 is erected, and the footrest 5 is lowered. FIG. 3 is a side view of the chair 1 in a non-interlocking state, in which the chair body A is in the lower position, the backrest 4 is tilted, and the footrest 5 is raised. FIG. 4 is a side view of the chair 1 in a non-interlocking state, in which the chair main body A is in the upper position, the backrest portion 4 is raised, and the footrest 5 is lowered.
As shown in FIGS. 1 to 4, the chair 1 supports a base portion 2 placed on the floor surface, a seat portion 3 on which a user sits, a backrest portion 4 on which the user can lean, and a user's legs. It is mainly comprised by the footrest 5 and the left-right paired armrest part 6 which supports a user's arm. And the chair main body A comprised by the seat part 3, the backrest part 4, the footrest 5, and the armrest part 6 is provided with respect to the base part 2 by the raising / lowering mechanism 7 mentioned later.
In addition, the concept of the direction in this specification is that the user seated on the chair 1 shown in FIG. 1 faces the front, the front is “front”, the rear is “rear”, and the left hand side is “left”. The right hand side is “right”, the head side is “upper”, the waist side is “lower”, and other cases will be described as appropriate.

[Configuration of base section]
Hereinafter, the configuration of the base unit 2 will be described.
FIG. 5 is a perspective view of the lifting base 8.
As shown in FIG. 1, the base part 2 supports the chair main body A so that the chair main body A can be moved up and down, and supports the lift base 8 mounted on the floor so that it can rotate horizontally with respect to the floor. And a plate-like rotary base 9. Therefore, the chair body A can be moved up and down with respect to the base portion 2 and can be rotated. In addition, the rotation mechanism 50 which rotates the raising / lowering base 8 which this chair 1 has with respect to the rotation base 9 is mentioned later.

[Composition of the chair body]
Hereinafter, the configuration of the chair body A will be described.
FIG. 6 is a perspective view of the main body frame 10 in the chair 1 in an unlinked state. FIG. 7 is a perspective view of the footrest link 13.
As shown in FIG. 6, the chair body A includes a front member 10a extending in the left-right direction, a side member 10b extending rearward from both left and right ends of the front member 10a, and a front-rear first member extending in the left-right direction connecting both side members 10b. The connecting member 10c, the pair of left and right vertical members 10d extending downward from the lower surface of the rear first connecting member 10c, the second connecting member 10e for connecting both the vertical members 10d, and the front member 10a and the first connecting member on the front side. The main body frame 10 includes a third connecting member 10f that connects the member 10c, and the seat 3, the backrest 4, the footrest 5, and the armrest 6 are assembled to the main body frame 10. It is configured. Specifically, a seat portion 3 having a cushioning property is provided on the upper portion of the main body frame 10, and a backrest portion 4 is provided around the axial center C1 in the left-right direction at the rear portion (rear end portion of the side member 10b) of the main body frame 10. The footrest 5 is provided at the front portion of the main body frame 10 so as to be able to be reclined (see FIGS. 2 and 3), and the left and right side portions (left and right sides) of the main body frame 10 are provided. The armrest 6 is provided on the member 10b). As shown in FIGS. 2 and 3, the footrest 5 has a footrest base 11 provided so as to be pivotable up and down around the axis C <b> 2 in the left-right direction with respect to the front member 10 a of the main body frame 10, and the footrest base 11. A footrest body 12 provided to be slidable in the length direction of the legs and a third connecting member 10f of the body frame 10 are provided so as to be rotatable up and down around the left and right axial centers C3 and C4. And a footrest link 13 that makes the footrest base 11 and the footrest body 12 turn up and down by abutting from the rear.

  As shown in FIG. 1, the seat portion 3, the backrest portion 4, and the footrest 5 are provided with a plurality of air cells 14 as massage portions that expand and contract by air supply / exhaust and press against the treatment portion. . Air supply / exhaust to / from these air cells 14 is performed by an air unit 15 including a pump 15a and a valve 15b. The pump 15a is provided on a lift base 8 on the base portion 2 side (FIGS. 4 and 5). The valve 15b is provided on the inner side of the vertical member 10d in the main body frame 10 on the chair main body A side (see FIG. 6).

  As shown in FIGS. 2 to 4 and 6, the chair body A includes a backrest actuator 16 that reclines the backrest 4 in the front-rear direction and a footrest actuator 17 that rotates the footrest 5 in the vertical direction. And have. That is, the state of the chair 1 shown in FIGS. 2 to 4 and 6 is a non-interlocking state in which the reclining of the backrest portion 4 and the vertical rotation of the footrest 5 are performed individually. The backrest actuator 16 and the footrest actuator 17 are constituted by a direct acting actuator that expands and contracts by a motor drive. The backrest portion actuator 16 is attached to the backrest portion actuator first attachment portion 18 provided at the front end portion of the first connecting portion 10 c of the main body frame 10, and the rear end portion is the lower end portion of the backrest portion 4. Is attached to the backrest actuator second mounting portion 19 provided on the backrest portion. The footrest actuator 17 is attached to the footrest actuator first attachment portion 20 provided at the rear end portion thereof on the second connecting portion 10e of the main body frame 10, and the front end portion thereof is provided on the footrest 5 (footrest link 13). It is attached to the footrest actuator second attachment portion 21 (see also FIG. 7). Although details will be described later, the footrest actuator 17 is detachable from the chair body A.

  As shown in FIG. 7, the footrest link 13 has an upper end portion rotatably connected to the third connecting member 10 f of the main body frame 10, and an axial center C <b> 3 located behind the axial center C <b> 2 of the footrest base 11. And it is configured to be able to rotate up and down around C4. Hereinafter, the structure of the footrest link 13 will be specifically described. The footrest link 13 has an upper end pivotally supported around the axis C3 at the third connecting portion 10f, and is attached to the footrest actuator second mounting portion 21 provided in the middle in the vertical direction. A first link 13a with a tip attached, a second link 13b pivotally supported about an axis C4 positioned above the axis C3 in the third connecting portion 10f, and a first link 13a A third link 13c pivotally supported around the axis C5 at the lower end, and a midway in the vertical direction pivotally supported about the axis C6 at the lower end of the second link 13b. It is configured. At the upper end of the third link 13c, a roller 13d that abuts the footrest base 11 from the rear and rolls in the vertical direction is provided.

  In the third link 13c, the axis C6 on which the second link 13b is supported is positioned above the axis C5 on which the first link 13a is supported, and the first link 13a Since the axis C4 that is the rotation fulcrum of the second link 13b is located above the axis C3 that is the rotation fulcrum, the footrest actuator 17 is extended to rotate the first link 13a upward. When moved, the upper end of the third link 13c rises forward as shown in FIG. Therefore, the rotation angles of the footrest body 12 and the footrest base 11 are larger than the rotation angle of the first link 13a, and the footrest 5 can be efficiently rotated up and down.

[Configuration of lifting mechanism]
Hereinafter, the configuration of the lifting mechanism 7 will be described.
FIG. 8 is a perspective view showing a main part of the lifting mechanism 7. FIG. 9 is a side view showing the main part of the lifting mechanism 7.
As shown in FIGS. 5, 8, and 9, the elevating mechanism 7 includes a rack 22 provided on the base portion 2 (elevating base 8) and extending upward, and a rack 22 provided on the chair main body A (main body frame 10). It is mainly comprised by the pinion 23 which meshes. That is, the elevating mechanism 7 in this embodiment employs a rack and pinion system.

  As shown in FIG. 5, a guide rail 24 and a rack 22 that extend upward are provided on the upper surface of the elevating base 8, and the guide rail 24 and the rack 22 are paired on the left and right. A plurality of pairs of guide rails 24 and racks 22 are provided in the front-rear direction (two pairs in this embodiment). The guide rail 24 has a rolling surface 24a on which a guide roller 25 included in a pinion 23, which will be described later, rolls back and forth, and is attached to attach a rack 22 extending in the front-rear direction from the inner end of the rolling surface 24a. It has a surface 24b and is configured in a generally U shape in plan view with the left and right inner sides open as a whole. The teeth of the front rack 22 and the rear rack 22 are opposite to each other in the front-rear direction. Specifically, the teeth of the front rack 22 face frontward and the teeth of the rear rack 22 face each other. Is facing backwards. In addition, a guide member 26 is provided on the surface opposite to the rolling surface 24 a so as to abut on the longitudinal member 10 d of the main body frame 10 from the front-rear direction and guide the lifting operation of the main body frame 10. The lift base 8 is provided with a lift sensor 27 that detects the vertical position of the chair main body A between the front and rear guide rails 24 at the upper part thereof. The lift sensor 27 detects the vertical position of the main body frame 10 by detecting the position of the detection body 28 made of a magnet provided on the vertical member 10 d of the main body frame 10. Specifically, as shown in FIGS. 2 and 4, the detection bodies 28 are provided at both upper and lower end portions of the vertical member 10 d, and the lower position (state of FIG. 2) and the upper position (FIG. 4) is detected.

  As shown in FIGS. 8 and 9, the pinion 23 is provided at both end portions of the pinion shaft 29 extending in the left-right direction, is paired on the left and right, and is rotatably supported by the pinion support member 30 connected to the body frame 10. Has been. Specifically, the left and right outer surfaces of the pinion support member 30 are attached to the left and right inner surfaces of the vertical member 10d. A plurality of pairs (two pairs in the present embodiment) of the left and right pair of pinions 23 are provided in the front-rear direction, and the pair of left and right pinions 23 respectively mesh with the pair of left and right racks 22 described above. Further, on the left and right outer surfaces of the pinion 23, a guide roller 25 is provided that contacts the rolling surface 24a of the guide rail 24 and rolls on the rolling surface 24a as the pinion 23 rotates. The front and rear guide rollers 25 are in pressure contact with the corresponding guide rails 24 in opposite directions, and specifically, the front left and right pair of guide rollers 25 roll rearward in the front guide rail 24. The pair of left and right guide rollers 25 in pressure contact with the surface 24 a are in pressure contact with the front rolling surface 24 a of the rear guide rail 24.

  As shown in FIG. 9, the pinion 23 (pinion shaft 29) is provided below with a predetermined distance with respect to the seat portion 3 provided on the upper part of the main body frame 10. That is, a space S is formed between the pinion shaft 29 and the seat portion 3, and the backrest portion actuator 16, the footrest actuator 17, or the backrest portion 4 and the footrest 5 described later are connected to this space S. A link member 38 is accommodated. As described above, since the lifting and lowering mechanism 7 in the present embodiment adopts the rack and pinion method, a device that causes the chair body A to perform other operations other than lifting and lowering below the seat portion 3 (in this embodiment, the backrest is supported). It is easy to dispose the part actuator 16, the footrest actuator 17, and the link member 38).

As shown in FIG. 9, the pinion support member 30 includes a motor 31, a worm 32 coupled to the motor 31 via a pulley, a worm wheel 33 meshing with the worm 32, and a rotation axis of the worm wheel 33 coaxially. A drive gear 34 that is provided and rotates with the worm wheel, a front and rear driven gear 35 that is provided so as not to rotate with respect to the front and rear pinion shafts 29 and rotates in synchronization with the rotation of the drive gear 34, and the drive gear 34 and the driven gear 35. And an idle gear 36 which is located between and meshes with each other.
The driven gear 35 will be described in detail. A driven gear 35 (first driven gear 35F) provided on one side (front side) pinion shaft 29 meshes with the drive gear 34, and the other side (rear side) pinion shaft 29. A driven gear 35 (second driven gear 35R) provided in the first gear is engaged with the idle gear 36, and the first driven gear 35F and the second driven gear 35R are configured to rotate in opposite directions. The worm 32, the worm wheel 33, the drive gear 34, the driven gear 35, and the idle gear 36 constitute a transmission member that transmits the rotational power of the motor 31 to the pinion shaft 29.

  Thus, since the first driven gear 35F meshes with the drive gear 34 and the second driven gear 35R meshes with the drive gear 34 via the idle gear 36, a pair of front and rear pinion shafts are driven by one motor. 29 can be rotated synchronously. Therefore, the lifting mechanism 7 can be realized at a low cost. Further, by interposing the idle gear 36 between the drive gear 34 and the second driven gear 35R, the first driven gear 35F and the second driven gear 35R can be rotated in opposite directions, so that the tooth rows are mutually connected. The front and rear pinions 23 can be engaged with the front and rear racks 22 facing in the reverse direction. In addition, the distance between the front and rear pinions 29 can be increased. Therefore, the chair body A can be lifted and lowered stably while suppressing the backlash of the chair body A with respect to the lifting base 8 in the front-rear direction. Moreover, since the raising / lowering operation | movement of the chair main body A is performed by motor drive, the setting of the raising / lowering speed is easy. Further, since the pinion shaft 29 having an axial direction in the left-right direction moves up and down together with the chair body A without changing the relative position in the vertical direction with respect to the chair body A, the pinion shaft 29 is provided before and after the seat portion 3 is provided below. It is possible to prevent interference with the backrest actuator 16 and the footrest actuator 17 that are long in the direction and expand or contract, or the link member 38 that is long in the front-rear direction.

  As shown in FIGS. 2 to 4, an urging member 37 that constantly urges the chair body A in the direction of raising the chair body A is provided between the base portion 2 and the chair body A. The urging member 37 is composed of a fluid pressure cylinder or the like configured in a vertically long bar shape, and a lower end portion of the urging member 37 is attached to the elevating base 8. It is attached (see also FIG. 6). Therefore, the driving force required to raise the chair body A can be supplemented by the biasing member 37, and the rising speed and the lowering speed of the chair body A can be substantially matched even when the user is seated. Can do.

[Switch between linked / unlinked status]
In the chair 1 according to the first embodiment of the present invention, the interlocking state in which the reclining of the backrest portion 4 and the vertical rotation of the footrest 5 are interlocked, and the reclining of the backrest portion 4 and the vertical rotation of the footrest 5 are performed individually. It is configured to be switchable to an unlinked state. Hereinafter, the switching operation between the linked state and the unlinked state will be described.

As described above, the chair 1 shown in FIGS. 2 to 4 shows a non-interlocking state. FIG. 10 is a side view of the chair 1 in an interlocked state, in which the chair body A is in the lower position, the backrest portion 4 is erected, and the footrest 5 is lowered. FIG. 11 is a side view of the chair 1 in an interlocked state, in which the chair body A is in the lower position, the backrest 4 is tilted, and the footrest 5 is raised. FIG. 12 is a perspective view of the main body frame 10 in the chair 1 in the interlocked state. In FIGS. 10 and 11, some members such as the guide rail 24 are omitted in view of visibility.
As shown in FIGS. 2 to 4, the non-interlocked chair 1 includes a backrest actuator 16 and a footrest actuator 17, and the expansion and contraction operations of the actuators 16 and 17 are controlled by a control unit (not shown). ) To be controlled individually. When the backrest actuator 16 is shortened, the backrest 4 tilts backward around the axis C1, and when the backrest actuator 16 extends, the backrest 4 rises forward around the axis C1. Further, when the footrest actuator 17 is extended, the footrest 5 is rotated upward via the footrest link 13, and when the footrest actuator 17 is shortened, the footrest link 13 is rotated downward, so that the footrest 5 is rotated downward by its own weight.

  The footrest actuator 17 is configured to be detachable from the chair body A. Hereinafter, the attachment / detachment structure of the footrest actuator 17 will be specifically described. As described above, the footrest actuator 17 has a rear end portion attached to the footrest actuator first attachment portion 20 and a front end portion attached to the footrest actuator second attachment portion 21 (FIGS. 6 and 6). 7). As shown in FIG. 6, the footrest actuator first mounting portion 20 is provided at the approximate center in the left-right direction of the second connecting portion 10 e in the main body frame 10. It is located at a position substantially coinciding with the second actuator portion for bending portion) and the second link attachment portion 21. The footrest actuator first mounting portion 20 has a pair of left and right plate-like brackets 39 having through holes penetrating in the left-right direction, and the rear end portion of the footrest actuator 17 is positioned between the pair of left and right brackets 39, 39. In this state, the pin 40 is inserted into the pair of brackets 39 and the footrest actuator 17 in a skewered manner from the through hole.

  As shown in FIG. 7, the footrest actuator second mounting portion 21 is provided in the middle of the footrest link 13 in the vertical direction of the first link 13 a. As with the footrest actuator first mounting portion 20, the footrest actuator second mounting portion 21 includes a pair of left and right plate-like brackets 41 having through holes in the left-right direction, and the pair of left and right brackets 41, 41. The pin 42 is inserted into the pair of brackets 41 and the footrest actuator 17 in a skewered manner from the through hole with the front end portion of the footrest actuator 17 positioned.

  The footrest actuator 17 can be attached to and detached from the chair body A by an operation of inserting and removing the pins 40 and 42. The footrest actuator 17 is removed from the chair 1 in the non-interlocking state shown in FIGS. 2 to 4 by removing the pins 40 and 42, and the link member 38 is attached to the chair body A instead. It can switch to the chair 1 of the interlocking state shown in FIG.

  As shown in FIGS. 10 to 12, the chair 1 in the interlocking state includes the backrest portion actuator 16 and the link member 38 that connects the backrest portion 4 and the footrest 5. The expansion / contraction operation is configured to be controlled by a control unit (not shown). When the backrest actuator 16 is shortened, the backrest 4 tilts backward about the axis C 1, and the footrest 5 rotates upward via the footrest link 13 in conjunction with the backward tilt of the backrest 4. . Further, when the backrest actuator 16 extends, the backrest 4 rises forward around the axis C1, and the footrest link 13 rotates downward in conjunction with the forward rise of the backrest 4 so that the footrest 5 Rotates downward due to its own weight.

  As shown in FIGS. 10 to 12, the link member 38 has a long plate shape in the front-rear direction, and is configured in a pair on the left and right. Further, like the footrest actuator 17, the chair body A is configured to be detachable. Hereinafter, the attachment / detachment structure of the link member 38 will be specifically described. The link member 38 has a rear end portion attached to a link first attachment portion 19 provided on the backrest portion 4, and a front end portion attached to a link second attachment portion 21 provided on the footrest 5. . In the interlocked state, the footrest actuator first mounting portion 20 is a surplus mounting portion that is not used.

  The first link attachment portion 19 is a lower end portion of the backrest portion 4 and is provided substantially at the center in the left-right direction. The link first mounting portion 19 is a pair of left and right plate-like brackets 43 having through holes penetrating in the left-right direction, and the rear end portion of the backrest portion actuator 16 is positioned between the pair of left and right brackets 43, 43. And the pair of bracket members 43, the pair of link members 38, and the backrest portion actuator 16 in the state where the rear end portions of the pair of left and right link members 38 are positioned on both outer sides of the pair of left and right brackets 43. And a pin 44 inserted like a skewer. In the present embodiment, the link first mounting portion 19 and the backrest portion actuator second mounting portion 19 are composed of the same member, and the pair of link members 38 and the backrest portion actuator 16 have a common pin 44. Since it is supported by the backrest part 4, it contributes to the reduction of the number of parts. Further, since the pair of link members 38 are arranged so as to be sandwiched between the left and right sides of the backrest portion actuator 16, the footrest 5 can be stably rotated up and down.

  As shown in FIGS. 7 and 12, the link second attachment portion 21 is provided in the middle of the footrest link 13 in the vertical direction of the first link 13 a. The link second mounting portion 21 is the same member as the footrest actuator second mounting portion 21, and a pair of left and right plate-like brackets 41 having through holes in the left-right direction and the pair of left and right brackets 41, 41. The pin 42 is inserted into the pair of brackets 41 and the pair of link members 38 in a skewered manner from the through holes with the front end portions of the pair of link members 38 positioned. In this embodiment, since the link 2nd attachment part 21 and the actuator 2nd attachment part 21 for footrests are comprised with the same member, it has contributed to reduction of a number of parts.

  The switching operation from the non-interlocking state to the interlocking state has been described above. Conversely, the switching operation from the interlocking state to the non-interlocking state will be described. The link member 38 can be attached to and detached from the chair main body A by an operation of inserting and removing the pins 42 and 44. The link member 38 is removed from the chair 1 in the interlocked state shown in FIGS. 10 to 12 by removing the pins 42 and 44, and the footrest actuator 17 is attached to the chair body A instead. 4 can be switched to the non-interlocked chair 1 shown in FIG. That is, by attaching the footrest actuator 17 to the chair body A using the footrest actuator first mounting portion 20 which is an excess mounting portion in the interlocked chair 1, the interlocked chair 1 is not interlocked. The chair 1 can be changed. And since the 1st attachment part 20 for footrests and the link 2nd attachment part 21 are located in the position which substantially corresponds in the left-right direction, the direct-acting thing can be employ | adopted as the actuator 17 for footrests.

  Since the interlocking state and the non-interlocking state can be switched in this way, the user or facility who desires a chair in which the reclining of the backrest part 4 and the vertical rotation of the footrest 5 are interlocked, and the backrest part 4 And the footrest 5 can respond to each request of a user or a facility who desires a chair that reclines and pivots up and down individually. For example, when the chair 1 of the present invention is provided to a facility such as a barber shop or a beauty salon by order production, a state corresponding to the space situation in each facility (the linked state or the unlinked state) is eliminated. It is advantageous in that a chair can be provided. Further, since the switching between the interlocking state and the non-interlocking state is performed by detaching the link member 38 and the footrest actuator 17, the structure of the link member 38 can be simplified.

[Configuration of rotating mechanism]
Hereinafter, the configuration of the rotation mechanism 50 will be described.
FIG. 13 is a perspective view of the rotation base.
As shown in FIGS. 5 and 13, a rotation mechanism 50 is provided between the upper surface of the rotation base 9 and the lower surface of the lift base 8 to connect the lift base 8 to the rotation base 9 so as to be rotatable. Specifically, the rotating mechanism 50 is fixed to the first rotating plate 51 fixed to the upper surface of the rotating base 9 and the lower surface of the elevating base 8, and is about the vertical axis with respect to the first rotating plate 51. It is comprised by the 2nd rotation board 52 which can rotate, and the rotating shaft C7 of the up-down direction which connects both the rotation boards 51 and 52 rotatably. Therefore, the elevating base 8 to which the second rotating plate 52 is attached is rotatable about the rotation axis C7 with respect to the rotating base 9 to which the first rotating plate 51 is attached.

  The chair 1 also has a lock mechanism 60 that restricts the rotation of the elevating base 8. Hereinafter, the configuration of the lock mechanism 60 will be described. On the upper surface of the rotation base 9, there are provided engaged portions 61 having recessed portions that are recessed downward. A plurality of the engaged portions 61 are provided on the concentric circle of the rotation shaft C7 (three in this embodiment). Is provided. An engaging portion 62 having a projecting portion protruding downward is provided at the rear portion of the elevating base 8, and this engaging portion 62 is from an air cell that expands and contracts by supplying and exhausting air from the air unit 15 described above. It is possible to move up and down by the driving unit 63. Engagement / disengagement of the engaging part 62 with respect to the engaged part 61 locks / unlocks the rotation of the elevating base 8 with respect to the rotating base 9.

Hereinafter, the structure of the chair 100 which concerns on 2nd Embodiment of this invention is demonstrated.
FIG. 14 is a side view of the chair 100 according to the second embodiment of the present invention, in which the chair body A is in the lower position, the backrest 4 is tilted, and the footrest 5 is raised. In addition, the structure different from the chair 1 of 1st Embodiment is only the structure of the link member 70, about the other structure, the same number as the chair 1 of 1st Embodiment is attached | subjected, and the description is abbreviate | omitted. In FIG. 14, some members such as the guide rail 24 are omitted in view of visibility.
As shown in FIG. 14, the link member 70 of the chair 100 according to the second embodiment can be switched between a stretchable state in which the length in the front-rear direction is variable and a non-stretchable state in which the length in the front-rear direction is unchanged. It is configured. The link member 70 includes a first link member 71 whose rear end portion is attached to the backrest 4 side, and a second link member 72 whose front end portion is attached to the footrest 5 side. The second link member 72 can be switched between a stretchable state and a non-stretchable state by an operation such as attachment / detachment of a fixing member 73 made of a pin or the like. The link member 70 has a rear end portion attached to a link first attachment portion 19 provided on the backrest portion 4, and a front end portion thereof is attached to the footrest base 11 (or the footrest body 12) unlike the footrest actuator 17. It has been.

  Since the interlocking state and the non-interlocking state can be switched as described above, the chair in which the reclining of the backrest portion 4 and the vertical rotation of the footrest 5 are interlocked as in the chair 1 according to the first embodiment. It is possible to respond to the respective demands of the desired user or facility and the user or facility that desires a chair in which the backrest 4 and the footrest 5 are individually reclined and turned up and down. Moreover, since the switching between the interlocking state and the non-interlocking state is performed by switching the expansion / contraction state of the link member 70, the attaching / detaching work of the link member 70 or the footrest actuator 17 is not required. Therefore, the switching operation between the interlocking state and the non-interlocking state is facilitated.

The chairs 1 and 100 of the present invention are not limited to the illustrated form, and may be in other forms within the scope of the present invention.
For example, the rack 22 and the pinion 23 may be configured as a pair in front and rear. In this case, pinions 23 are provided at both front and rear end portions of the pinion shaft 29 whose axial direction faces the front-rear direction. A plurality of combinations of the rack 22, the pinion 23, and the pinion shaft 29 are provided in the left-right direction.
Moreover, the link 1st attaching part 19 which attaches the link member 38 may be attached to the movable part (part which expands / contracts) in the backrest part actuator 16.
Moreover, the link 2nd attachment part 21 and the actuator 2nd attachment part 21 for footrests may be provided in the footrest 5 (footrest link 13) as another member. In this case, it is preferable that the footrest actuator first mounting portion 20 and the footrest actuator second mounting portion 21 are located at substantially the same position in the left-right direction.
Moreover, as a massage part provided in the seat part 3, the backrest part 4, and the footrest 5, instead of or in addition to the air cell 14, for example, a roller, a vibrator, or a treatment element that performs itching or hitting may be provided. .

  The present invention can be applied to a chair having a novel lifting mechanism instead of the lifting mechanism described in Patent Document 1.

DESCRIPTION OF SYMBOLS 1 Chair 2 Base part 3 Seat part 4 Backrest part 5 Footrest 7 Lifting mechanism 16 Backrest part actuator 17 Footrest actuator 18 Backrest part actuator first attachment part 19 Backrest part actuator second attachment part (1 mounting part)
20 Footrest actuator first mounting portion 21 Footrest actuator second mounting portion (link second mounting portion)
22 rack 23 pinion 29 pinion shaft 31 motor 34 drive gear 35F driven gear (first driven gear)
35R driven gear (second driven gear)
36 Idle gear 37 Biasing member 38, 70 Link member 39, 41, 43 Bracket 40, 42, 44 Pin A Chair body

Claims (8)

A base part placed on the floor;
At least a chair body provided with a seat on which a user is seated;
A rack and pinion type lifting mechanism provided between the base portion and the chair main body and moving the chair main body up and down with respect to the base portion. The lifting mechanism is
A rack and pinion paired on the left and right, and a pinion shaft that is a rotation axis of the paired pinion,
The chair according to claim 1, wherein a plurality of combinations of the rack and pinion and the pinion shaft are provided in the front-rear direction. The lifting mechanism is
A rack and pinion paired in front and rear, and a pinion shaft that is a rotation axis of the paired pinion,
The chair according to claim 1, wherein a plurality of combinations of the rack and pinion and the pinion shaft are provided in a left-right direction. The lifting mechanism is
A motor, and a transmission member that transmits the rotational power of the motor to the pinion shaft,
The transmission member is
A drive gear linked to the motor;
4. The chair according to claim 2, further comprising a driven gear provided on the plurality of pinion shafts and rotating in synchronization with rotation of the drive gear. The transmission member is
A first driven gear meshing with the drive gear;
The chair according to claim 4, further comprising a second driven gear that meshes with the drive gear via an idle gear and rotates in a direction opposite to the first driven gear. The rack is provided so as to extend in the vertical direction on the base portion side,
The chair according to any one of claims 2 to 5, wherein the pinion is rotatably supported on the chair main body side via the pinion shaft. The chair body is
A backrest where a user can drown;
The chair according to claim 6, further comprising: a reclining mechanism that is positioned below the seat portion and above the pinion shaft and that reclines the backrest portion with respect to the seat portion.   The chair according to any one of claims 1 to 7, further comprising a biasing member that is interposed between the base portion and the chair main body and biases the chair main body in a direction of raising the chair main body.

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