JP2819110B2 - Chair lifts and chair lifts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an up-and-down seat for a chair and a lifting chair capable of lifting and lowering a seat surface, and more particularly to an up-and-down seat and a lifting chair for a chair capable of performing a smooth lifting operation. Concerning chairs.

[0002]

2. Description of the Related Art The chair lift for a chair shown in FIG. 13 has been previously proposed by the present applicant (registered utility model No. 3006221).
No.). The chair lifting table 100 has a base 10
The swing support legs 102, 102 are provided so as to be able to be raised and lowered within a range of about 90 degrees with respect to 1, a seat surface 103 supported by the swing support legs 102, 102 and capable of elevating and lowering the seat surface 103. A chair is placed on a seat surface 103 of a chair lift provided with a lifting drive unit 104 to be operated.

The lifting drive unit 1 of the chair lifting table 100
An airbag 104a is provided between the base 101 and the seat 103 so as to be extendable and contractible.
And an air supply / discharge unit 104b for supplying / discharging air to / from the apparatus.

In the chair lifting table 100, the air supply / discharge unit 104b is operated by a switch operation, and the seat surface 103 can be moved up and down by inflating and contracting the airbag 104a. On the other hand, it is possible to reduce the burden on the legs and waist when taking off and taking a seat. In particular, in the chair lift, a soft lifting operation is ensured by the airbag 104a, and the seating surface 103 moves up and down with the sliding operation back and forth. This has the advantage that the user's feet can be easily taken in and out.

[0005]

However, since the seat lift is supplied and discharged by the air supply / discharge unit, and the seat is raised and lowered by the expansion and contraction operation of the airbag,
There is a problem that the apparatus is increased in size for controlling the elevation speed of the seat surface, and that air supply / discharge sound cannot be avoided.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention firstly provides a swing support leg provided to be able to rise and fall with respect to a base, and a vertically movable support leg supported by the swing support leg. And a lifting and lowering drive unit for raising and lowering the seating surface, wherein the lifting and lowering drive unit includes an engagement portion slidably engaged with the swing support leg. And a swing arm that swings the engagement portion to raise and lower the swing support leg.

The lifting drive section comprises an engaging portion slidably engaged with the swing support leg, and a swing arm capable of swinging the engagement portion to raise and lower the swing support leg. Since the swing arm can be driven to rotate by the electric motor, the swing support leg can be smoothly and quietly raised and lowered by simple control.

[0008] Second, the mounting position of the lifting drive unit is determined in plan view when the swing support leg is folded down, and both support axes of the base-side support portion and the seat-side support portion of the swing support leg. , And the engaging portion is disposed near the bearing surface side support portion, and the swing center of the swing arm is disposed near the base side support portion and away from the base side support portion.

The distance between the swing center of the swing arm and the base-side support portion in the front-rear direction is ensured, and the engaging portion can be arranged near the seat-side support portion. The swing supporting leg can be rotated by a small driving torque by the moving arm, and therefore, driving by a small electric motor becomes possible.

Third, the swing support legs are provided on both sides of the seat surface, and a lifting drive unit is provided for each. As a result, it is possible to secure a stable lifting operation in a well-balanced manner on the left and right.

Fourthly, the engaging portion of the swing arm includes two rotatable rollers that can be guided across the swing support leg, and a roller base supporting both rollers with respect to the swing arm. Support swinging. Thereby, the assembling property can be improved while ensuring the swing guide function of the swing support leg.

Fifth, the seating surface includes a turning portion that turns between the upper surface and the lower surface. By the turning part,
Since the seat chair placed on the seat surface can be turned, it is possible to easily avoid a table or the like when taking off or taking a seat.

Sixth, a seat is connected to the swing support leg,
The seat portion is provided with a backrest having a freely inclined angle, and the backrest has a receiving portion movable along the up-down direction, a support member for supporting the rearward fall through the receiving portion, and the receiving portion. And a helical shaft for moving the vertical position.

The above-mentioned backrest can hold the upper body of the user by arbitrarily changing the inclination angle thereof by the inclination driving mechanism, and can be linked with the lifting / lowering operation of the seat portion.

[0015]

FIG. 1 is a side view of a chair lift and a chair according to an embodiment of the present invention. Chair lift 1
Are swing support legs 3a, 3b provided to be able to undulate within a range of approximately 90 degrees with respect to the base 2, and the swing support legs 3a, 3b
In addition to a seating surface 4 supported by and capable of ascending and descending, a lifting / lowering drive unit 5 that moves the seating surface 4 up and down, a seating chair 6 and an operation unit (not shown) are provided. The chair is placed on the seat 4 during use.

The swing support legs 3a, 3b form parallel, equal-length links, and are rotatably connected to the base-side support portions 2a, 2b by the seat-side support portions 4a, 4b, respectively. Further, a square pipe 7 is provided on both sides of the base 2 and telescopic legs 8 are slidably fitted at the ends thereof. When the telescopic legs 8 are pulled out, the length of the base 2 is increased.
Is small, it is possible to secure stability when a load acts on the front side of the base 2.

FIG. 2 is a perspective view of the lifting drive unit. The lifting drive unit 5 includes engagement units 11 and 11, swing arms 12 and 12, a reduction gear unit 13, an electric motor 14 with a reduction gear, and the like. The engagement portions 11, 11 are slidably engaged with swing support legs 3b, 3b provided on both sides of the base 2, respectively. The swing arms 12, 12 swingably support the engagement portions 11, 11, and are connected by a support shaft 12a so as to raise and lower the swing support legs 3b, 3b. It is connected to a reduction shaft 14b of a reduction unit 14a of a motor 14 with a reduction gear via a unit 13.

FIG. 3 is a side view of the elevation drive unit, and FIG. 4 is a plan view of the elevation drive unit. Swing arm 1 of lifting drive unit 5
The arrangement positions of the swing support legs 3b, 3b in the plan view when the swing support legs 3b are folded down are the base-side support portions 2 of the swing support legs 3b.
b and a range between the two bearing axes of the bearing-side bearing 4b at the opposite end. Further, the engaging portion 11 is disposed near the bearing-side support portion 4b, and the center of the support shaft 12a of the swing arm 12 is disposed near the base-side support portion 2b and separated from the base-side support portion 2b.

Since the clearance A between the support shaft 12a of the swing arm 12 and the base-side support portion 2b in the front-rear direction is ensured, and the engaging portion 11 can be arranged near the seat-side support portion 4b. The swing support leg 3b can be rotated by a small drive torque by the swing arm 12 having a small working radius. Therefore, the size of the motor 14 with a speed reducer can be reduced. And, since the swing arm can be driven to rotate by the electric motor, it can be smoothly controlled by simple control.
In addition, the swing support leg can be made to move up and down quietly. In addition, the reduction gear section 13 can be further quietened by being formed of a helical gear.

The engaging portion 11 at one end of the swing arm 12 is provided with a roller base 21 and
And two rollers 22. Two rollers 22,
Numeral 22 stands up from the roller base 21 at an interval for rotatably sandwiching the swing support leg 3b, and supports the roller base 21 so as to be swingable with respect to the swing arm 12. The up-and-down movement of the swing support leg 3b is guided according to the tilt.

FIG. 5 is an explanatory view of the operation of the chair lifting table. By rotating the swing arm 12 of the lifting drive unit 5, the engagement unit 11 guides the swinging movement of the swing support leg 3b. At this time, the seat 4 is moved up and down as shown by the arrow B while keeping its posture horizontal by the front swing support legs 3a parallel to the swing support legs 3b. When the swing support leg 3b is swung to the upright position, the motor drive is stopped by a sensor (not shown), thereby keeping the seating surface 4 at the raised position.

FIG. 6 is a diagram showing the state of use when the seat is lowered. The elevation drive unit 5 operates according to a command from an operation unit (not shown), and the swing support legs 3a and 3b are swung to the lying position, so that the seat surface 4 is lowered while moving forward. The foot E can be easily put under the table D. Conversely, when ascending, the foot E can be easily put out by the retreat operation.

FIG. 7 is a diagram showing the state of use when the seat is raised. The lift C is operated by a command from an operation unit (not shown), and the swing support legs 3a and 3b are swung to the upright position. The foot E can be put out from under the table D, and the user can easily stand up. These lifting and lowering operations can be performed quietly and smoothly because the motors and gears are easy to control the speed and generate little noise.

FIG. 8 is a side view of the lift-type chair according to the present invention. The same members as those in the embodiment of the lift table are denoted by the same reference numerals, and description thereof is omitted. The lift-type seating chair 31 has a seat 30 attached to the swing support legs 3a and 3b, and the seat 30
Above, a backrest 32 that can be freely tilted by a motor drive
Is provided. The backrest 32 is connected by a support 33 provided at the rear of the seating surface 4. This backrest 32
A tilting mechanism is provided which includes a receiving portion 34 whose position in the vertical direction is movable, and a support member 35 that supports the rearward fall through the receiving portion 34. This support member 35 is provided on the support 3
It is connected to the seat portion 30 via a 5a so as to be able to move up and down.

FIG. 9 is a rear view of the internal mechanism of the backrest. A horizontal member 36a, 36b is provided on the frame 36, and two slide bars 3 are provided by these horizontal members 36a, 36b.
7, 37 and a rotatable helical shaft 38 at the center thereof are provided in parallel in the vertical direction. The helical shaft 38 has a motor 39 with a speed reducer at the lower part thereof.

FIG. 10 is a detailed perspective view of the tilting mechanism of the backrest. The receiving portion 34 slidably penetrates the slide bars 37, 37 and is screwed with the spiral shaft 38. Thus, the receiving unit 34 is moved up and down in accordance with the rotation of the motor 39. The receiving portion 34 has an engaging portion 40 protruding rearward, and the upper portion of the support member 35 is detachably engaged with a notch 40 a having a part cut out in a groove shape. By engaging the support member 35 with the notch 40a, the inclination angle of the backrest portion can be changed with the vertical movement of the receiving portion 34.

FIG. 11 is a view showing a use state when the backrest is inclined. Elevating chair 31 configured as above
The lifting / lowering drive unit 5 is operated by a command from an operation unit (not shown), and the swing support legs 3b, 3b are swung to the lying position, whereby the seat unit 30 is lowered while moving forward. This allows
User C can put foot E under table D,
Further, the backrest 32 can be tilted by a switch (not shown) to adjust the tilt, and the upper body F can be held in a comfortable posture.

FIG. 12 is a diagram showing the state of use when the backrest is raised. The elevation drive unit 5 operates according to a command from an operation unit (not shown), and the swing support legs 3b, 3b are swung to the upright position, so that the seat unit 30 moves up while retracting. Thus, the user C can put out the foot E from under the table D. At this time, the user C can easily stand up by adjusting the inclination of the backrest 32 and raising the upper body F.

In this case, the lifting of the seat 30 and the backrest 3
By interlocking with the upright operation of the second step, the user can stably stand up without being bothered by the switch operation.

In the above embodiment, by dividing the seat portion 30 into upper and lower members and interposing a turning portion therebetween,
If the body is turned sideways when taking off or taking a seat, a table or the like can be easily avoided. Specifically, the seat is divided into a support base that supports the swing support leg and a cushion part,
The swivel portion, which can be configured by providing a swivel portion that is rotatably connected to the support base below the cushion portion, can easily turn the body to the side. Can be easily avoided.

In addition, the cushion portion is made compatible with the support base so that various forms can be selected, so that it can meet a wide range of needs in addition to the advantage of mass production on the support base side.

[0032]

According to the present invention, the lift drive unit of the chair lift according to the first aspect of the present invention includes an engaging portion slidably engaged with the swing support leg, and this engaging portion. The swing arm can be swung up and down so that the swing support leg can be raised and lowered, so that the swing arm can be rotationally driven by the electric motor, so that the swing can be smoothly and quietly controlled by simple control. The moving support leg can be raised and lowered.

According to a second aspect of the present invention, the position of the lifting drive unit is such that both the base-side support portion and the seat-side support portion of the swing support leg are viewed in plan when the swing support leg is folded down. The swing center of the rocking arm is located between the axes, and the engaging portion is located near the bearing portion on the seat side, and the swing center of the swing arm is located near the support portion on the base side. The distance in the front-rear direction between the base and the base-side support is ensured, and the engaging portion can be arranged near the seat-side support. The legs can be pivoted, and thus can be driven by a small electric motor.

According to the third aspect of the present invention, the swinging support legs are provided on both sides of the seat surface, and the respective lifting drive units are provided to ensure a stable lifting operation with good balance between the left and right sides. can do.

According to a fourth aspect of the present invention, the engaging portion of the swing arm swings two rollers capable of being guided with the swing support leg therebetween and a roller base supporting both rollers with respect to the swing arm. To support. Thereby, the assembling property can be improved while ensuring the swing guide function of the swing support leg.

According to the fifth aspect of the present invention, the seating surface includes a swivel portion which is connected to be able to swivel up and down.

According to a sixth aspect of the present invention, there is provided an up-and-down type seat chair, wherein a back portion having a tilt angle is provided on a seat portion, and the back portion is provided with a receiving portion movable along the up-down direction and a rear portion through the receiving portion. The backrest can be arbitrarily changed its inclination angle by the inclination driving mechanism, since the receiving part is provided with an inclination driving mechanism including a support member that supports falling down and a helical shaft that moves the receiving part in the vertical direction. Therefore, the upper body of the user can be held in a comfortable posture, and can be linked with the lifting / lowering operation of the seat.

[Brief description of the drawings]

FIG. 1 is a side view of an embodiment of a chair lift.

FIG. 2 is a perspective view of a lifting drive unit.

FIG. 3 is a side view of a lifting drive unit.

FIG. 4 is a plan view of a lifting drive unit.

FIG. 5 is an explanatory diagram of an operation of a lifting drive unit.

FIG. 6 is a diagram showing a use state when the seat is lowered.

FIG. 7 is a view showing a use state when the seat surface is raised.

FIG. 8 is a side view of the lifting chair according to the present invention.

FIG. 9 is a rear view of the backrest.

FIG. 10 is a detailed perspective view of a backrest.

FIG. 11 is a view showing a use state when the backrest is inclined.

FIG. 12 is a use state diagram when the backrest is raised.

FIG. 13 is a side elevational view of a conventional lift-type seat chair when it is raised.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Chair lift 2 Base 2a, 2b Support part 3a, 3b Swing support leg 4 Seat surface 4a, 4b Support part 5 Elevation drive part 6 Seat chair 7 Square pipe 8 Telescopic leg 11 Engagement part 12 Swing Arm 12a Support shaft 13 Reduction gear section 14 Motor with reduction gear 21 Roller base 22 Roller 30 Seat section 31 Elevating chair 32 Backrest 33 Support section 34 Receiving section 35 Support member 34a Support section 36 Frame 37 Slide bar 38 Spiral shaft 39 Motor with reducer 40 Engagement part 40a Notch A Escape dimension C User D Table E Foot F Upper body

Claims (6)

(57) [Claims] An oscillating support leg provided so as to be able to move up and down with respect to a base, a seat surface supported by the oscillating support leg and capable of elevating and lowering, and an elevating drive unit for elevating the seat surface. In the chair lifting platform, the lifting drive unit includes an engagement portion slidably engaged with the swing support leg, and a swingable swingable swingable leg that swings the engagement portion. An elevator for a seat and chair, comprising a moving arm. 2. The disposition position of the lifting / lowering drive unit is defined between a support axis of the base-side support portion and a bearing surface-side support portion of the swing support leg in plan view when the swing support leg is folded down. Range, and
2. The device according to claim 1, wherein the engaging portion is disposed near the bearing surface side support portion, and the swing center of the swing arm is disposed near the base side support portion and separated from the base side support portion. Chair lift. 3. The chair lift according to claim 1, wherein the swing support legs are provided on both sides of the seat surface, and a lift drive unit is provided on each of the swing support legs. 4. An engaging portion of the swing arm swings two rollable rollers that can be guided across a swing support leg and a roller base that supports both rollers with respect to the swing arm. The chair lift for a chair according to claim 1, wherein the lift is supported as possible. 5. The seat according to claim 1, wherein the seat has a turning portion that turns between an upper surface and a lower surface.
Elevating chair described. 6. A seat is connected to the swing support leg of the chair lift according to claim 1, and a back is provided on the seat with a tiltable angle. A movable portion, a support member for supporting the rearward fall through the receiving portion, and a tilting drive mechanism including a spiral shaft for moving the vertical position of the receiving portion. Elevating chair.