JPH06996Y2 - Seat height adjustable chair - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a chair with adjustable seat height that is widely used for learning or office work.

[Prior Art] Recently, as a chair of this kind, a pair of columns that are mutually connected through a horizontal member and expand and contract in conjunction with each other by operating force applied to a single operating handle, and on these columns. And a seat supported via a seat bracket, and the seat height can be adjusted by the simultaneous expansion and contraction of the columns. Thus, in this structure, for example, a screw jack type lifting position adjusting mechanism is provided in each of the columns, and an operating force applied to the operation handle is provided inside the horizontal member to raise and lower the positions of the columns. It has a crank type transmission mechanism for transmitting to each. In such a system, a notch is provided at an intermediate position on both sides of the seat frame of the seat, and both ends of the horizontal member are positioned in the notch. Then, seat receiving fittings having an L-shaped cross section are attached to both sides of the seat frame so as to straddle the notch, and the seat receiving fittings are fixed to the seat frame by a screw member or the like, whereby the seat is fixed. It is supported on a pillar.

[Problems to be solved by the invention] However, in such a structure, both side portions of the seat frame of the seat are separated into front and rear through the notches, and the front frame portion and the rear frame of the seat frame are separated. Each of the parts is indirectly supported by the seat bracket through the separated half parts of both side parts. Therefore, there is a problem that it is relatively weak against the load that tends to tilt the seat back and forth.

In addition, usually, the upholstery material that covers the surface of the seat is wound up to the bottom surface of the seat frame and stretched, but in the above configuration, the upholstery material is provided between the seat frame and the seat bracket. If the seat cover loses elasticity due to aging, the seat bracket will be loosened and the seat will rattle.

Further, in such a structure, the columns must be arranged near both ends of the seat frame without fail, and there is a disadvantage in that there are many restrictions on the functional design and design design.

The present invention aims to solve such problems at once.

[Means for Solving Problems] The present invention adopts the following configuration in order to achieve the above objects.

That is, the chair with adjustable seat height according to the present invention comprises a pair of columns that are connected to each other through a horizontal member and expand and contract in conjunction with each other by an operating force applied to a single operating handle, and a pair of columns on the columns. A chair with adjustable seat height, comprising a seat supported through a seat bracket and having a surface tension member stretched on the surface, wherein the seat bracket of each of the columns is elongated in the front-rear direction. Mounting pieces are provided at both ends thereof, and the seat brackets of each of the columns are mutually connected by the horizontal member to form an H-shaped structure in plan view by the horizontal member and the seat bracket on the upper surface of the column. With the entire upper surface of the H-shaped structure in contact with the lower surface of the seat, the mounting piece on the front end side of the seat bracket is attached to the inner surface facing the rear frame section of the front frame section of the seat. It is characterized in that the mounting pieces on the end side are respectively fixed to the inner surfaces of the seat frame of the seat facing the front frame part of the rear frame part.

[Operation] With such a structure, the H-shaped structure in plan view is formed by the seat bracket and the horizontal member, and the entire upper surface of the H-shaped structure is in contact with the lower surface of the seat. Since the front frame portion and the rear frame portion of the seat frame of the seat can be directly coupled by the seat receiving metal fittings on the respective inner surfaces facing each other, the load applied to the seat is supported by the seat receiving metal fitting and the horizontal member. It is possible to prevent the load from being concentrated on a specific member or site. At the same time, since the front and rear ends of the seat bracket are directly connected to the front and rear seat frames,
It is possible to effectively receive and support the load that tends to tilt the seat back and forth. In this case, the seat bracket can also serve as a reinforcing member that replaces both sides of the seat frame.

Also, since the upholstery material that covers the surface of the seat does not intervene between the seat bracket and the front and rear frame portions of the seat frame, when the upholstery material loses elasticity due to aging, It is possible to prevent the seat bracket from being loosely attached to the frame.

Moreover, since it is not necessary to attach such a seat bracket to both ends of the seat frame, the distance between the columns is not restricted by the lateral width of the seat.

[Embodiment] An embodiment in which the present invention is applied to a chair for learning will be described below with reference to the drawings.

In this chair, as shown in FIG. 1, a pillar 3 is erected on a base portion 2 of a leg 1, a seat 4 is supported on an upper end portion of the pillar 3, and a crossbar 5 is attached to both side surfaces of the seat 4. Set up these 5 horizontal bars
A backrest 6 is provided between the upper ends of the.

More specifically, the leg 1 is formed by vertically arranging a pair of columns 3 on both sides of the upper surface of the base 2. The support column 3 is a combination of an inner column member 31 and an outer column member 32 slidably in a telescope shape, and a mounting bracket 33 having a U-shaped cross section is fixed to the lower end of the inner column member 31. A seat bracket 34 having an L-shaped cross section is fixed to the upper end of the outer column member 32, and a horizontal member 7 is installed between the upper ends of the outer column member 32. That is, the horizontal member 7 connects the support columns 3 of the legs 1 to each other, and also connects the seat brackets 34 to each other, and functions together with the seat brackets 34 as a seat support member having an H-shaped structure in plan view. is doing. Further, a screw jack type elevation position adjusting mechanism (not shown) for changing the vertical relative positions of the inner column member 31 and the outer column member 32 is incorporated in the column 3, respectively.
A crank type transmission mechanism (not shown) for accommodating the rotary operation force applied to the single operation handle 8 to the both elevating position adjusting mechanisms to elevate and lower the seat 4 is housed inside the horizontal member 7. I am doing it.

The seat 4 is a wooden seat frame 4 on the lower edge of the top plate 41 made of plywood.
2 is attached, and its top plate 41 and seat frame 42
A cushion material (not shown) is provided on the outer surface side of the upholstery material 4
3 is stretched. It should be noted that this seat frame 42 corresponds to the top plate 4 described above.
1, the front frame portion 42a fixed to the lower surface front edge portion and the top plate 4
1 and a rear frame portion 42b fixed to the rear edge portion of the lower surface of 1.
Both side frame parts are omitted.

The cross bar 5 is fixed to both end surfaces of the front frame part 42a and the rear frame part 42b of the seat frame 42 by using cross bar fixing screw members 51 and 52, respectively.

Further, the seat 4 is fixed to the seat receiving metal fitting 34 of the pillar 3 by using screw members 45 and 46 for fixing the seat. That is, the seat bracket 34 fixed to the upper end of the column 3 is the horizontal piece 3
4a and an upright piece 34b, which has an L-shaped cross section and whose front-rear dimension is the front frame portion 42 of the seat frame 42.
The length is set to be long corresponding to the distance between the a and the rear frame portion 42b. Then, the tongue-shaped mounting pieces 34c, 3 having screw holes 35, 36 at the front and rear ends of the seat bracket 34, respectively.
4d are integrally provided, and the mounting member 34c on the front end side is fixed to the inner surface of the front frame portion 42a of the seat frame 42 by the screw member 45 inserted through the screw hole 35, and the mounting member on the rear end side is attached. 34d is fixed to the inner surface of the rear frame portion 42b of the seat frame 42 via a screw member 46 which is inserted through the screw hole 36. In this case, the seat bracket 34 and the horizontal member 7 are fixed in contact with the lower surface of the seat 4.

With such a structure, the seat receiving metal fitting 34 and the horizontal member 7 form an H-shaped structure in plan view, and the entire upper surface of the seat receiving metal fitting 34 is in contact with the lower surface of the seat 4. The seat frame 4 of the seat 4
Since the front frame portion 42a and the rear frame portion 42b of No. 2 can be directly coupled to each other on the inner surfaces facing each other, the load applied to the seat 4 is supported by the seat bracket 34 and the horizontal member 7, and The load is not concentrated on the members or parts of. At the same time, the front and rear ends of the seat bracket 34 are the front and rear seat frame portions 4.
Since the seat 4 is directly connected to the seats 2a and 42b, it is possible to effectively receive and support the load that tends to tilt the seat 4 back and forth. In this case, the seat bracket 3
4 can also serve as a reinforcing member to replace both side portions of the seat frame 42, so that both side portions can be omitted as in this embodiment. Therefore, it is possible to effectively prevent the inconvenience that the support structure of the seat 4 is weakened by the presence of the horizontal member 7 having the transmission mechanism for simultaneously expanding and contracting the plurality of columns 3 and ensure high durability. .

Moreover, since it is not necessary to attach such seat receiving fittings 34 to both side portions of the seat frame 42, the distance between the pair of columns 3 is not restricted by the lateral width of the seat 4. Therefore, as in this embodiment, it is also possible to easily adopt a form in which both the support columns 3 are located inside the left and right side edges of the seat 4 considerably.

The chair according to the present invention is not limited to a chair for learning, and may be, for example, an office chair.

[Effects of the Invention] As described in detail above, according to the present invention, the entire upper surface of the H-shaped structure in plan view formed by the horizontal member connecting the columns and the seat bracket is brought into contact with the lower surface of the seat. In this state, the seat bracket is made long and fixed to the front and rear frames of the seat frame, so the load applied to the seat can be distributed, and the load is evenly distributed to the columns. As a result, the stability of the seat can be increased, and the load or the like that tilts the seat in the front-rear direction can be directly and reasonably received. Therefore, even if it is handled roughly, it is hard to break and high durability can be secured.

Moreover, since it is not necessary to attach such a seat bracket to both sides of the seat frame, the distance between the columns is not restricted by the lateral width of the seat. Therefore, from the viewpoint of ease of use and design, it is also possible to adopt a form in which both columns are located inside the left and right side edges of the seat. That is, according to such a configuration, it is possible to obtain the effect of increasing the degree of freedom in functional design and design design. In addition, since the upholstery material that covers the surface of the seat does not exist between the seat bracket and the front and rear frame portions of the seat frame, when the upholstery material loses elasticity due to secular change, The seat bracket can be prevented from being loosely attached to the rear frame portion, and the durability is improved.

Further, in such a case, the seat bracket can also serve as a reinforcing member that substitutes for both side portions of the seat frame, so that both side portions of the seat frame can be omitted. Therefore, the seat can be appropriately deformed and assembled so as to correspond to the shape of the seat receiving bracket or the crossbar. Therefore, it is possible to easily deal with various specifications, that is, specifications in which the upper surface of the seat is inflated, specifications in which the upper surface of the seat is dented, and the like, by using one type of seat.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is an overall perspective view, and FIG. 2 is an exploded perspective view observed from the back surface of a seat. DESCRIPTION OF SYMBOLS 1 ... Leg 2 ... Base part 3 ... Strut 4 ... Seat 7 ... Horizontal member 8 ... Operation handle 31 ... Inner pillar member 32 ... Outer pillar member 34 ... Seat bracket 34c ... Mounting piece 34d ... Mounting piece 42 ... Seat frame 42a ... front frame part 42b ... rear frame part 43 ... upholstery material

Claims (1)

[Scope of utility model registration request] 1. A pair of struts connected to each other through a horizontal member and extending and contracting in conjunction with each other by an operating force applied to a single operating handle, and a pair of struts supported on these struts via a seat bracket. A chair with adjustable seat height, comprising a seat on which a surface covering is stretched, wherein the seat brackets of each of the columns are elongated in the front-rear direction and mounting pieces are provided at both ends thereof. Provided, the seat brackets of each of the columns are interconnected by the horizontal member to form an H-shaped structure in plan view on the upper surface of the column by the horizontal member and the seat bracket, and the entire upper surface of the H-shaped structure is formed. With the seat abutting against the lower surface of the seat, the mounting piece on the front end side of the seat bracket is attached to the inner surface facing the rear frame part of the front frame part of the seat frame of the seat, and the mounting piece on the rear end side of the seat A chair with adjustable seat height, which is fixed to an inner surface of the rear frame portion of the seat frame facing the front frame portion, respectively.