JP5941734B2 - Lift chair - Google Patents

Description

  The present invention relates to an elevating seat chair that elevates and lowers an elevating unit to which a seat is attached along an elevating guide rail of a base unit.

  For example, Japanese Patent Laid-Open No. 6-90982 discloses an elevating seat chair that assists a rising motion of a seated person with weak legs. This lift chair is shown in FIGS. The lifting frame 101 to which the seat and the backrest are attached can be lifted and lowered along the left and right side guide rails 103 and 103 and the one center guide rail 104 assembled to the leg frame 102.

  Armrests 106 are attached to the left and right subframes 105, 105 of the lifting frame 101. The armrests 106 are separate left and right, and can be flipped up from the horizontal state to an angle along the backrest.

JP-A-6-90982

  However, in the above-described lift chair, the left and right armrests 106 are used separately, so the number of parts increases and the manufacturing cost increases. In particular, when an aluminum die-cast part is used, the manufacturing cost is remarkably increased.

  An object of this invention is to provide the raising / lowering chair which can hold down manufacturing cost cheaply.

In order to achieve such an object, the invention according to claim 1 is an elevator seat chair for elevating a lift unit to which a seat is attached along a lift guide rail of a base unit. The arm has a pair of left and right armrests attached to the lifting unit side frame by the mechanism, and the arm flipping mechanism is an elbow rotation shaft member attached to either the lifting unit side frame or the armrest, and the other The elbow rotary shaft member that is attached to the elbow rotary shaft member so as to rotatably support the elbow rotary shaft member, and the movable angle of the elbow rotary shaft member with respect to the elbow rotary shaft member attached to either the elbow rotary bearing member or the elbow rotary shaft member A positioning member for limiting the range, and the positioning member is mounted on the elbow rotation bearing member and the elbow rotation shaft member. The member includes a right mounting portion that positions the positioning member at a position where the movable angle range of the armrest is within the movable angle range for the right side, and a left mounting portion that positions the positioning member at a position that is within the movable angle range for the left side. both are provided, together with the elbow rotating shaft member and the elbow rotary bearing member and the positioning member is used inside out symmetrically attached selectively to either the positioning member of the right mounting portion and the left mounting portion in which the movable angle range of the elbow rotation shaft member also corresponds to the armrest right or left is located in the same position between the left and right arm rests from particular.

  In the lift chair according to claim 2, the positioning member has the first rotation-preventing convex portion, and the member to which the positioning member is not attached is one of the elbow rotation bearing member and the elbow rotation shaft member. And the elbow rotation bearing member and the elbow rotation shaft member can be rotated relative to each other within a range where the first rotation prevention projection and the second rotation prevention projection contact each other. ing.

  In the lifting / lowering chair according to claim 3, the lifting / lowering unit is removable from the base unit.

  According to a fourth aspect of the present invention, the seat is pivotably attached to the lifting unit side frame, and a turning lock mechanism is provided between the seat and the lifting unit side frame. Is to lock the swivel of the seat by inserting a convex part provided on either one of the concave part provided on either the seat side or the lifting unit side frame side, forming a concave part The surface in the turning direction is a tapered surface that narrows the width of the recess as it goes farther.

  Furthermore, the lift chair according to claim 5 includes a movable frame on which the base unit moves up and down along the lift guide rail and to which the lift unit is attached, and the lift guide rail extends in the front-rear direction. And a second guide surface along the width direction. The movable frame is provided with a first roller guided by the first guide surface and a second roller guided by the second guide surface. It is what.

  In the lifting and lowering chair according to claim 1, since the arm flipping mechanism can be adapted to either the left or right armrest by selecting the mounting portion, the same common armrest flipping mechanism is used for the left and right armrests. can do. That is, when the left and right armrests can be flipped up, the left and right armrests have different rotational directions, and therefore, the left and right arm flipping mechanisms need different structures. Therefore, in general, separate elbow raising mechanisms are required for the left and right armrests, which increases the number of parts and increases the cost. In particular, since the elbow flip-up mechanism uses expensive aluminum die-cast parts, the increase in the number of parts greatly increases the cost. On the other hand, in the lift chair of the present invention, the same elbow raising mechanism can be used for the left and right armrests, so the types of parts can be reduced and the manufacturing cost can be reduced. . Moreover, since the amount of use of one component is doubled, the production cost per component can be reduced due to the mass production effect.

  In the lift chair according to claim 2, relative rotation between the elbow rotation bearing member and the elbow rotation shaft member is performed within a range in which the first rotation prevention convex portion and the second rotation prevention convex portion abut. Since it is possible, the relative rotation of the elbow rotation bearing member and the elbow rotation shaft member can be limited by the degree of contact between the convex portions, and the left and right armrests can be securely held in a horizontal state when used. .

  In the lifting / lowering chair according to claim 3, since the lifting / lowering unit is detachable from the base unit, the lifting / lowering unit can be easily attached and detached, and the lifting / lowering chair can be easily moved. For example, you can easily attach the lifting unit to the base unit at the destination and assemble the lifting chair, so if it is separate, move the lifting chair in a state of being divided into units that are easy to move Can be handled easily.

  Moreover, in the lifting / lowering seat chair of Claim 4, a convex part can be applied to a taper surface by inserting a convex part to the back of a recessed part, and the rattling at the time of a lock | rock can be prevented.

  Furthermore, in the lifting / lowering seat chair according to claim 5, the rattling between the lifting guide rail and the movable frame is caused by applying a first roller to the first guide surface, thereby causing rattling in the left-right direction. In addition to being able to prevent, rattling in the front-rear direction can be prevented by applying the second roller to the second guide surface. Since the first guide surface and the second guide surface are provided on the same elevating guide rail, it is possible to prevent both the rattling in the left-right direction and the shakiness in the front-rear direction using the same elevating guide rail. The manufacturing cost can be reduced compared with the case where separate guide rails are provided.

It is a perspective view which shows embodiment of the raising / lowering chair of this invention. It is the perspective view of the state which removed the seat of the same seat chair, a backrest, and various covers. It is the side view of the state which removed the seat of the same seat chair, a backrest, and various covers. It is the perspective view which looked at the base unit from diagonally forward. It is the perspective view which looked at the base unit from diagonally backward. It is the perspective view which looked at the raising / lowering unit from diagonally forward. It is the perspective view which looked at the raising / lowering unit from diagonally backward. It is a figure which shows the relationship between the 1st and 2nd guide surface and the 1st and 2nd roller. It is a disassembled perspective view which shows a turning mechanism and a turning lock mechanism. It is sectional drawing which shows a turning mechanism and a turning lock mechanism. It is a top view which shows a rotation lock mechanism. It is a disassembled perspective view which shows the armrest flip-up mechanism on the left side. It is a disassembled perspective view which shows the principal part of the armrest flip-up mechanism on the right side. It is a disassembled perspective view which shows the principal part of the left armrest flip-up mechanism. It is a side view of the elbow rotation bearing member which shows the attachment part for right, and the attachment part for left. It is a side view of the elbow rotation bearing member which shows a mode that the positioning member was attached to the attachment part for right. It is a side view of the elbow rotation bearing member which shows a mode that the positioning member was attached to the attachment part for left. It is a perspective view which shows a connection mechanism. It is the perspective view which looked at the movable frame from the front. It is a perspective view of the conventional raising / lowering seat chair. It is a front view of the conventional lift chair.

  Hereinafter, the configuration of the present invention will be described in detail based on the form shown in the drawings.

  FIGS. 1-19 shows an example of embodiment of the raising / lowering chair of this invention. The elevating seat chair elevates the elevating unit 2 to which the seat 1 is attached along the elevating guide rail 4 of the base unit 3. The base unit 3 is fixed to the leg frame 5 and the leg frame 5. 4 is provided.

  The leg frame 5 is formed by connecting left and right vertical frames 5a with two horizontal frames 5b, and is placed on the floor in a tilted state. The left and right wheels 6 are attached to the rear horizontal frame 5b, and when moving, the grip portion 5c at the front of the left and right vertical frames 5a is lifted so that the entire lift chair is tilted rearward to resemble a wheelbarrow. It is possible to run. When the leg frame 5 is placed on the floor, the wheels 6 are floating from the floor.

  In the present embodiment, the lifting guide rails 4 are provided on the left and right, but the present invention is not limited to this. The left and right lifting guide rails 4 are attached to the rear portions of the left and right vertical frames 5a. The upper ends of the left and right lifting guide rails 4 are connected by a horizontal plate 7. A handle 8 is attached to the upper ends of the left and right lifting guide rails 4. The raising / lowering guide rail 4 has the 1st guide surface 4a along the front-back direction of a raising / lowering chair, and the 2nd guide surface 4b along the width direction. In the present embodiment, as shown in detail in FIG. 8, the lifting guide rail 4 is formed by a square pipe having a slit 4d provided on the inner side plate 4c, and the outer surface of the inner side plate 4c is the first guide surface 4a. The inner surfaces of the front and rear side plates 4e and 4f are second guide surfaces 4b.

  The base unit 3 includes a movable frame 9 that moves up and down along the lifting guide rail 4 and to which the lifting unit 2 is attached. In the present embodiment, the movable frame 9 is configured by connecting the upper and lower two horizontal frames 9a with the four vertical frames 9b. However, the present invention is not limited to this. The movable frame 9 is disposed between the left and right lifting guide rails 4.

  The movable frame 9 is provided with a first roller 11 guided by the first guide surface 4a and a second roller 12 guided by the second guide surface 4b. In the present embodiment, the first roller 11 is provided on the front surface of the left and right vertical frames 9b of the movable frame 9, and the second roller 12 is provided on the side surfaces of the left and right vertical frames 9b. The first roller 11 is disposed outside the lifting guide rail 4, while the second roller 12 is disposed inside the lifting guide rail 4. The rotation shaft of the second roller 12 passes through the slit 4d of the lifting guide rail 4 and is connected to the vertical frame 9b. In the present embodiment, the first roller 11 and the second roller 12 are provided in the top and bottom two on each of the left and right, but the present invention is not limited to this.

  About the rattling between the raising / lowering guide rail 4 and the movable frame 9, while the 1st roller 11 is applied to the 1st guide surface 4a, while the rattling of the raising / lowering chair is prevented in the left-right direction, By shaking the second roller 12 against the second guide surface 4b, the back-and-forth movement of the lift chair is prevented. Since the first guide surface 4a and the second guide surface 4b are provided on the same elevating guide rail 4, both the left and right direction shakiness and the forward and backward shakiness using the same elevating guide rail 4 are provided. The manufacturing cost can be reduced as compared with the case where separate guide rails are provided.

  The base unit 3 includes a drive unit 10. The drive unit 10 moves the slider 13 up and down along the drive rail 10a, and an electric motor for moving the slider 13 up and down is accommodated in the motor case 10b. The electric motor is operated by an operation switch 15 provided on the left and right armrests 14. The slider 13 is connected to the movable frame 9, and when the slider 13 moves up and down along the drive rail 10a, the movable frame 9 moves up and down along the left and right lifting guide rails 4, and the lifting unit 2 moves up and down.

  The lift unit 2 includes a seat back frame 17 to which the seat 1 and the backrest 16 are attached, and a support frame (lift unit side frame) 18 that supports the seat back frame 17. The support frame 18 of the present embodiment is formed by connecting a pair of left and right vertical frames 18a with five horizontal frames 18b, and the rear part of the left and right vertical frames 18a rises along the lifting guide rail 4, and this rising part An extending portion 18d is configured to extend substantially horizontally from the lower end of 18c toward the front.

  The seat back frame 17 of the present embodiment is formed by connecting a pair of left and right vertical frames 17a with five horizontal frames 17b, a seat receiving portion 17c whose front half is substantially horizontal, and a back attachment whose rear half is almost vertical. It is part 17d. The seat 1 is attached to the seat receiving portion 17c, and the backrest 16 is attached to the back mounting portion 17d. The backrest 16 is attached to, for example, the upper two horizontal frames 17b.

  The seat 1 is pivotally attached to the support frame 18. In this embodiment, by providing a turning mechanism 19 between the seat back frame 17 and the support frame 18, the seat 1 is attached to the support frame 18 so as to be turnable.

  The turning mechanism 19 is shown in detail in FIGS. The swivel mechanism 19 sandwiches the slide bearing 22 between the lower plate 20 fixed to the extending portion 18d of the support frame 18 and the upper plate 21 fixed to the seat receiving portion 17c of the seat back frame 17 and The side plate 20 and the upper plate 21 are rotated around the center shaft 23. The center shaft 23 is attached to the upper plate 21 side and is relatively rotatable with the lower plate 20 side. A sleeve 24 is interposed between the center shaft 23 and the upper plate 21, and rattling between the center shaft 23 and the upper plate 21 is prevented. Further, a sleeve 26 is interposed between the center shaft 23 and the bearing sleeve 25 attached to the lower plate 20, and rattling between the center shaft 23 and the lower plate 20 is prevented. . The sliding bearing 22 is, for example, a resin plate having a small friction coefficient, but is not limited thereto. In the present embodiment, a fixed disk 27 attached to the lower plate 20 is provided between the sliding bearing 22 and the lower plate 20, and the upper plate 21 is provided between the sliding bearing 22 and the upper plate 21. A swivel disk 28 attached to each is provided. By rotating the upper plate 21 with respect to the lower plate 20, the seat back frame 17 to which the seat 1 and the backrest 16 are attached can be turned with respect to the support frame 18. Although turning is performed by human power, it may be performed by electric drive.

  Further, a turning lock mechanism 29 is provided between the seat 1 and the support frame 18. In this embodiment, a turning lock mechanism 29 is provided between the seat receiving portion 17 c of the seat back frame 17 to which the seat 1 is attached and the extending portion 18 d of the support frame 18, that is, in the vicinity of the turning mechanism 19. By providing the turning lock mechanism 29 in the vicinity of the turning mechanism 19, the structure can be simplified. The turning lock mechanism 29 is provided in one of the recesses 30 provided on either the seat receiving portion 17c side of the seat back frame 17 to which the seat 1 is attached or the extending portion 18d side of the support frame 18 on the other side. The turning of the seat 1 is locked by inserting the convex portion 31.

  The turning lock mechanism 29 is shown in detail in FIGS. In the present embodiment, the concave portion 30 is provided on the extended portion 18d side of the support frame 18 and the convex portion 31 is provided on the seat receiving portion 17c side of the seat back frame 17 (fixed side: concave portion 30, swivel side: convex The portion 31) may be provided with the concave portion 30 on the seat receiving portion 17c side, and the convex portion 31 may be provided on the extending portion 18d side (fixed side: convex portion 31, turning side: concave portion 30).

  The recess 30 is provided at the edge of the fixed disc 27 fixed to the lower plate 20. The number of recesses 30 may be one, but a plurality of recesses 30 may be provided when locking at a plurality of turning angles. In the present embodiment, the seat back frame 17 is turned to the front (front) (turning angle: 0 degree), the position can be turned by 45 degrees left and right, and the position can be locked by 90 degrees left and right. The recesses 30 are provided at a total of five positions that can be locked.

  The recessed part 30 is expanded and shown in FIG. In FIG. 11, arrows CW and CCW are turning directions of the seat 1. The surface in the turning direction that forms the recess 30, in this embodiment, the left and right surfaces of the cutout of the fixed side disk 27 are tapered surfaces 32 that narrow the width W <b> 1 of the recess 30 toward the back. In the present embodiment, both the left and right surfaces are tapered surfaces 32, but only one of them may be the tapered surface 32. In the present embodiment, the inclination angle θ of the tapered surface 32 is set to 5 degrees, but is not limited thereto. The width W1 of the concave portion 30 is wider than the width W2 at the tip of the convex portion 31 at the opening portion of the concave portion 30, and is narrower than the width W2 at the tip of the convex portion 31 at the back portion. When inserted, the convex portions 31 hit the left and right tapered surfaces 32. Therefore, rattling at the time of locking can be prevented, and comfort can be improved.

  The convex portion 31 is accommodated in a holder 33 provided on the bottom surface of the upper plate 21, and has a tip projecting toward the concave portion 30. A return spring 34 is provided between the holder 33 and the convex portion 31, and the convex portion 31 is always biased in a protruding direction. The protrusion 31 is provided with a hole 31a into which the operation pin 35 is inserted. A receiving pin 36 is provided in the hole 31a. When the operating pin 35 swings and pushes the receiving pin 36, the convex portion 31 faces the back of the holder 33 against the spring force of the return spring 34. It moves and the tip is pulled out from the recess 30. The operation pin 35 is attached to a rotation lever 38 connected to the operation lever 37. In this embodiment, the operation lever 37 is provided on both the left and right sides of the seat 1.

  By operating the operation lever 37, the rotation lever 38 rotates and the operating pin 35 pulls out the convex portion 31 from the concave portion 30. On the other hand, when the hand is released from the operation lever 37, the convex portion 31 is pushed out by the spring force of the return spring 34 and inserted into the concave portion 30.

  In the present embodiment, a turning angle limiting mechanism that limits the angle at which the seat back frame 17 can turn is provided. The turning angle limiting mechanism enables the seat back frame 17 to turn within a range in which the stopper 40 provided on the fixed side disk 27 hits the two stoppers 41 provided on the turning side disk 28. In the present embodiment, when the seat back frame 17 turns 90 degrees in both the left and right directions, the stop portions 41 are provided at positions where they come into contact with the stopper 40, but the present invention is not limited thereto.

  The lifting unit 2 includes a pair of left and right armrests 14. The left and right armrests 14 are respectively attached to the seat back frame 17 by an armrest jumping mechanism 42 that is common to the left and right. The armrest flip-up mechanism 42 is mounted on either the seat back frame 17 side or the armrest 14 side, and the elbow rotation shaft member 43 is mounted on either one, and rotatably supports the elbow rotation shaft member 43. An elbow rotation bearing member 44, and a positioning member 45 that is attached to one of the elbow rotation bearing member 44 and the elbow rotation shaft member 43 and limits the movable angle range of the elbow rotation shaft member 43 relative to the elbow rotation bearing member 44 are provided. ing. In this embodiment, the elbow rotation shaft member 43 is attached to the armrest 14, and the elbow rotation bearing member 44 is attached to the armrest frame 46 connected to the seat back frame 17. In this embodiment, the positioning member 45 is attached to the elbow rotation shaft member 43.

  The elbow rotation shaft member 43 is provided with a rotation shaft portion 43a that protrudes in a columnar shape, and the elbow rotation bearing member 44 is provided with a bearing portion 44a that protrudes in a cylindrical shape, with the positioning member 45 interposed therebetween. The elbow rotation shaft member 43 and the elbow rotation bearing member 44 are combined by fitting the rotation shaft portion 43a into the bearing portion 44a. Further, the elbow rotation bearing member 44 is provided with a locking projection 44b, and the locking projection 44b is passed through the hole 43b of the elbow rotation shaft member 43 so that the presser washer 47 is fitted and screwed. The elbow rotation shaft member 43 and the elbow rotation bearing member 44 are assembled so as to be relatively rotatable. A disc spring 48 is interposed between the elbow rotation shaft member 43 and the presser washer 47 and between the elbow rotation shaft member 43 and the elbow rotation bearing member 44. Further, a blindfold plate 49 is attached to the elbow rotation shaft member 43 so that the locking convex portion 44b and the screw cannot be seen.

  The positioning member 45 is an arc-shaped member, and is attached to both ends of the surface of the elbow rotation bearing member 44 and the elbow rotation shaft member 43 to which the positioning member 45 is attached (in this embodiment, the elbow rotation bearing member 44). A convex portion 45a is provided. Moreover, the 1st rotation prevention convex part 45b is provided in the both ends of the surface on the opposite side.

  Of the elbow rotation bearing member 44 and the elbow rotation shaft member 43, the movable angle range of the armrest 14 is the movable angle range for the right side of the member to which the positioning member 45 is attached (the elbow rotation bearing member 44 in this embodiment). Both a right mounting portion 50 that positions the positioning member 45 at a position and a left mounting portion 51 that positions the positioning member 45 at a position that falls within the movable angle range for the left side are provided. In the present embodiment, the attachment portions 50 and 51 are provided on the assembly surface 44 c of the elbow rotation bearing member 44. At two locations on the same circumference and the same diameter of the assembly surface 44c, mounting concave portions 44d for fitting the mounting convex portions 45a of the positioning member 45 are provided. The mounting convex portions 45a and the mounting concave portions 44d are provided. The attachment portions 50 and 51 to which the positioning member 45 is attached can be selected by changing the combination. When the right armrest 14 is attached, the positioning member 45 is attached to the right mounting portion 50 as shown in FIG. 16, and when the left armrest 14 is attached, the positioning member 45 is positioned to the left attachment portion 51 as shown in FIG. The member 45 is attached.

  A second anti-rotation convex portion 43 d is provided on the assembly surface 43 c of the elbow rotation shaft member 43 with the elbow rotation bearing member 44. In the present embodiment, second anti-rotation projections 43d are provided at two locations corresponding to the first anti-rotation projection 45b. The second anti-rotation projections 43d and the first anti-rotation projections 45b are alternately arranged, and the elbow is within a range where the second anti-rotation projections 43d hit the first anti-rotation projections 45b on both sides. The rotary shaft member 43 is rotatable with respect to the elbow rotary bearing member 44. When the positioning member 45 is attached to the right mounting portion 50 of the elbow rotation shaft member 43, the elbow rotation shaft member 43 can be rotated from the substantially horizontal state to an angle along the backrest 16, while the elbow rotation shaft member 43 can rotate. When the positioning member 45 is attached to the left mounting portion 51 of the elbow rotation shaft member 43, the elbow rotation shaft member 43 can rotate from the substantially horizontal state to an angle along the backrest 16 from the substantially horizontal state.

  As described above, since the armrest flip-up mechanism 42 can correspond to either the left or right armrest 14 by selecting the mounting portions 50 and 51, the same common armrest flip-up mechanism 42 is used for the left and right armrests 14. can do. That is, when the left and right armrests 14 can be flipped up, the left and right armrests 14 have different rotation directions, and therefore, the left and right elbow lifting mechanisms need different structures. Therefore, in general, separate elbow flipping mechanisms are required for the left and right, and the number of parts increases, resulting in high costs. In particular, since the elbow flip-up mechanism uses expensive aluminum die-cast parts, the increase in the number of parts greatly increases the cost. On the other hand, in the present invention, since the same arm flip-up mechanism 42 is used for the left and right armrests 14, the types of parts are reduced and the manufacturing cost can be reduced. Moreover, since the amount of use of one component is doubled, the production cost per component can be reduced due to the mass production effect.

  In addition, the relative rotation between the elbow rotation bearing member 44 and the elbow rotation shaft member 43 can be limited by the degree of contact between the rotation-preventing convex portions 45b and 43d, and the left and right armrests 14 can be brought into a substantially horizontal state when used. You can stop firmly. Therefore, when a seated person puts an elbow on the armrest 14, it can be received firmly, and it is excellent in stability and can improve sitting comfort.

  The elevating unit 2 is detachably attached to the base unit 3 via a coupling mechanism 52. The coupling mechanism 52 includes a seat receiver 53 attached to the movable frame 9 of the base unit 3 and a seat fixture 54 attached to the support frame 18 of the elevating unit 2. In the present embodiment, the combination of the seat receiver 53 and the seat fixture 54 is provided on the left and right, but is not limited thereto.

  The seat receiver 53 is fixed to the front surface of the vertical frame 9b of the movable frame 9. The seat receiver 53 is provided with a receiving recess 53a that opens upward and a hole 53b through which the locking bolt 55 passes. A weld nut (not shown) is provided on the back side of the hole 53b. On the other hand, the seat fixture 54 is fixed to the rear surface of the rising portion 18 c of the vertical frame 18 a of the support frame 18. The seat fixture 54 is provided with a shaft 54a hooked on the receiving recess 53a and a hole 54b through which the locking bolt 55 passes.

  When the support frame 18 of the elevating unit 2 is attached to the movable frame 9, the elevating unit 2 is lifted and the shaft 54 a of the seat fixture 54 is dropped (hanged) into the receiving recess 53 a of the seat receiver 53 from above. As a result, the positions of the holes 53b of the seat receiver 53 and the holes 54b of the seat fixture 54 coincide with each other, so that the holes 53b and 54b are screwed into the weld nuts through the locking bolts 55 and fixed. Thereby, the support frame 18 is attached to the movable frame 9. It is only necessary to lift the lifting unit 2 and hook the shaft 54a into the recess 53a and stop the locking bolt 55, so that the lifting unit 2 can be easily attached. The load of the lifting unit 2 is transmitted from the seat fixture 54 to the seat receiver 53. The front surface of the seat fixture 54 and the rear surface of the seat receiver 53 are flat surfaces having a certain area, and the seat receiver 53 can firmly receive the loads of the lifting unit 2 and the seating person.

  When the support frame 18 is removed from the movable frame 9, an operation opposite to the operation for attachment is performed. That is, after the locking bolt 55 is removed, the lifting unit 2 is lifted to remove the shaft 54 a of the seat fixture 54 from the receiving recess 53 a of the seat receiver 53. Since it can be removed simply by removing the locking bolt 55 and lifting the lifting unit 2, the lifting unit 2 can be easily removed.

  Thus, since attachment and removal of the elevating unit 2 are simple, the elevating seat chair can be easily moved. That is, since the elevating unit 2 can be easily assembled to the base unit 3 at the moving destination, it can be moved in a state of being divided into units having a weight that can be easily moved if they are separated.

  In the state where the elevating unit 2 is lowered, it can be used as a seat chair. When a seated person rises, the operation switch 15 is operated to operate the drive unit 10 to raise the elevating unit 2, thereby assisting the rising operation. After the elevating unit 2 is stopped at a predetermined height, the operation lever 37 of the turning lock mechanism 29 is operated to pull out the convex portion 31 from the concave portion 30 to release the lock. Thereby, the seat back frame 17 can be turned. The seat 1 can be turned sideways by turning the seat back frame 17. Since the convex portion 31 of the turning lock mechanism 29 is always urged in the direction in which it protrudes by the return spring 34, when the convex portion 31 faces any one of the five concave portions 30, the convex portion 31 is inserted into the concave portion 30. The turning is locked. In this state, the seated person gets down from the seat 1 and stands up. Since the elevating unit 2 is raised to a certain height, it is easy for a seated person with weak legs to stand up.

  In addition, the elevator chair can be seated in a standing state. After the seated person sits on the seat 1 and locks the seat 1 in the front direction, the operation unit 15 is operated to operate the drive unit 10 to lower the elevating unit 2 so that the seat chair is lowered. Sitting is assisted. Since the seated person can sit on the seat 1 at a high position, even a seated person with weak legs can easily sit down on the seat chair.

  The seat 1 can be turned by a turning mechanism 19 and can be turned by a turning lock mechanism 29. In the present embodiment, the turn of the seat 1 can be locked at a position of front (0 degree), 45 degrees to the left and right, and 90 degrees to the left and right.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Seat 2 Lifting unit 3 Base unit 4 Lifting guide rail 4a 1st guide surface 4b 2nd guide surface 9 Movable frame 11 1st roller 12 2nd roller 14 Left and right armrest 18 Support frame (lifting unit side frame)
29 Turning lock mechanism 30 Concave portion 31 Convex portion 32 Tapered surface (surface in the turning direction forming the concave portion)
42 Elbow Bounce Mechanism 43 Elbow Rotation Shaft Member 44 Elbow Rotation Bearing Member 45 Positioning Member 50 Right Attachment 51 Left Attachment

Claims (5)

In the lift seat chair that lifts and lowers the lift unit to which the seat is attached along the lift guide rail of the base unit,
The elevating unit includes a pair of left and right armrests attached to the elevating unit side frame by a common left and right armrest flip-up mechanism,
The armrest flip-up mechanism is attached to one of the lifting unit side frame side and the armrest side, and is attached to one of the other, and rotatably supports the elbow rotation shaft member. An elbow rotation bearing member; and a positioning member that is attached to one of the elbow rotation bearing member and the elbow rotation shaft member and limits a movable angle range of the elbow rotation shaft member with respect to the elbow rotation bearing member,
Of the elbow rotation bearing member and the elbow rotation shaft member, the member to which the positioning member is attached is mounted on the right side in which the positioning member is disposed at a position where the movable angle range of the armrest becomes the movable angle range for the right side. And a left mounting portion that arranges the positioning member at a position that becomes a movable angle range for the left side,
Wherein with used upside down symmetrically from the elbow rotating shaft member and the elbow rotation bearing member and the positioning member, the positioning member is selectively be attached to either of the left mounting portion and said right mounting portion lift chair seat, wherein the more the movable angle range of the elbow rotation axis member corresponding to armrest right or left is located in the same position between said left and right armrest to.   The positioning member has a first rotation-preventing convex portion, and the member to which the positioning member is not attached among the elbow rotation bearing member and the elbow rotation shaft member has a second rotation-preventing convex portion. The elbow rotation bearing member and the elbow rotation shaft member are rotatable relative to each other within a range in which the first rotation prevention convex portion and the second rotation prevention convex portion are in contact with each other. The lift chair according to claim 1.   The lift chair according to claim 1 or 2, wherein the lift unit is removable with respect to the base unit.   The seat is pivotably attached to the lift unit side frame, and a turn lock mechanism is provided between the seat and the lift unit side frame, and the turn lock mechanism is connected to the seat side and the lift unit. The turn of the seat is locked by inserting the convex part provided on either side into the concave part provided on either side of the unit side frame side, and the surface in the turning direction forming the concave part The elevating seat chair according to any one of claims 1 to 3, wherein the elevating seat has a tapered surface that narrows the width of the concave portion toward the back.   The base unit includes a movable frame that moves up and down along the lifting guide rail and to which the lifting unit is attached. The lifting guide rail includes a first guide surface along the front-rear direction and a second guide along the width direction. The movable frame is provided with a first roller guided by the first guide surface and a second roller guided by the second guide surface. The elevating seat chair according to any one of claims 1 to 4.

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