JPS63111815A - Chair - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a chair that is widely used for learning or office purposes.

[Prior Art] As a chair of this type, a chair is known in which a seat is disposed on leg supports via seat frame fittings, etc., and a backrest is supported by the seat via a crosspiece or the like.

However, in such a type of chair, the seat is fixed to the seat bone fitting using screw members, etc., and the cross members are fixed at multiple points on both sides of the seat using dowels, screw members, etc. It is generally fixed to the

[Problems to be Solved by the Invention] However, with this configuration, the seat cannot be tilted or the crossbars cannot be tilted. Therefore, the backrest cannot be retracted to a position other than the use position, and the backrest becomes bulky when stored, packed, and transported. In some cases, the crossbars are fastened with screws, and then they are disassembled and packed, but in the case of conventional ones, as mentioned above, each crosspiece is fastened in multiple places with screws, so it is easier to pack them. There is a problem in that it takes time and effort to assemble the crosspiece to the seat after unraveling it.

The common objective of the present invention is to solve these problems.

[Means for Solving the Problems] In order to achieve the above objects, the present invention employs the following configuration.

That is, the chair according to the first invention includes a leg provided with a seat support member at the upper end of the support, a seat that is removably placed on the seat support member of the leg, and a backrest supported by the seat. and a hinge mechanism that rotatably connects the front end of the seat to the front end of the seat support member, the seat being rotated forward from a mounting position on the seat support member. The present invention is characterized in that the front rest is configured to face the lower surface of the leg.

In addition to the above-described configuration, a second invention also provides an inclination angle adjustment between the rear end side of the seat and the seat support member for adjusting the mounting angle of the seat with respect to the seat support member. It is characterized by the interposition of a mechanism.

[Operation] With such a configuration, by pressing the backrest forward, the seat can be rotated forward together with the backrest. Then, when the seat is rotated approximately 270 degrees, the irritation will face the lower surface of the leg.

Conversely, if the seat is rotated rearward from this state to raise the backrest and the seat is placed on the leg seat support members, the configuration for use will be adjusted. Since further rearward rotation of the seat and backrest is prohibited by the seat support member, the backrest can be used with a backward load applied to it.

In addition, in the second invention, since an inclination angle adjustment mechanism is provided between the seat and the seat support member for adjusting the mounting angle of the seat with respect to the seat support member, the seat and the seat in the use state are The posture of the backrest can be adjusted.

[Example] Hereinafter, an example in which the present invention is applied to a learning chair will be described with reference to the drawings.

Embodiment 1 (Figures 1 to 5) As shown in Figures 1 and 2, this chair has a support 3 erected on the base 2 of the leg 1, and a seat support on the support 3. A member 4 is provided, a seat 5 is placed on the seat supporting member 4, horizontal bars 6 are attached to both sides of the seat 5, and a backrest 7 is provided between the upper ends of these horizontal bars 6. .

Specifically, the leg 1 has a pair of support columns 3 erected on both sides of the upper surface of the base portion 2, and a seat support member 4 made of plywood is mounted approximately horizontally on both support columns 3 via mounting brackets (not shown). It will be permanently installed.

As shown in FIG. 3, the seat 5 has a seat frame 52 provided at the lower edge of a top plate 51.
A surface covering material 54 is stretched on the outer surface of 2 with a cushioning material 53 interposed therebetween.

On the other hand, the crossbar 6 is L-shaped and has a horizontal part 61 and an upright part 62 integrally formed, and the horizontal part 61 is connected to the seat 5.
The front end 5a of the seat 5 is fixed to both sides of the seat frame 52 using screw members, dowels, etc. (not shown), and the front end 5a of the seat 5 is connected to the front end of the seat support member 4 of the leg 1 via a hinge mechanism 8. 4a
It is connected so that it can rotate.

The hinge mechanism 8 has a pair of brackets 81 extending forward and fixed on both sides of the front end 4a of the seat support member 4, and an insert nut 82 in the seat frame 52 of the seat 5.
is buried so as to be exposed on the outer surface of the horizontal bar 6, and the support shaft 83 screwed onto the insert nut 82 is attached to the bracket 81.
It is rotatably supported. That is, the support shaft 83 has a threaded portion 83a on the inner end side, and
It has a flange part 83b at the outer end, and the threaded part 8
3a onto the insert nut 82, and
The flange portion 83a is brought into sliding contact with the outer surface of the bracket 81.

With such a configuration, by pressing the backrest 7 forward from the state shown by the solid line in FIG. It can be tilted forward about the axis 83. As shown in FIG. 5, the backrest 7 can also be rotated to a position where it approaches and faces the lower surface of the base portion 2 of the leg 1. Therefore, the bulk of the material when stored or packed and transported can be significantly reduced compared to when in use. In addition, since the seat 5 and the backrest 7 rotate together, the backrest 7 may be thick or the lower edge of the backrest 7 may be close to the seat 5 when in use. Even if there are
This backrest 7 can be smoothly moved to the retracted position facing the lower surface 1a of the leg 1.

Then, by rotating the seat 5 from this retracted position to a position where the backrest 7 stands up, and locking the lower surface 5b of the seat 5 to the upper surface 4b of the seat support member 4, that is all that is required. As shown in FIG. 4, the backrest 7 is erected and ready for use.

In this state, the seat support member 4 prevents the seat 5 from rotating further rearward from this position, so that the backrest 7 can be used with a rearward load applied thereto. Further, even when no backward load is applied to the backrest 7, the dust 5 is appropriately pressed against the seat support member 4 due to the gravity acting on the seat 5, crosspiece 6, and backrest 7. maintains a stable posture during use.

Example 2 (Figures 6 to 9) In this example, the same chair as in Example 1 was further equipped with:
A tilt angle adjustment mechanism 9 for adjusting the mounting angle of the seat 5 with respect to the seat support member 4 is provided, and the same parts as in the first embodiment are given the same reference numerals and explanations will be omitted.

This inclination angle adjustment mechanism 9 has concave portions 91 and 92 provided on the upper surface of the rear end of the seat support member 4 and the lower surface of the rear end of the seat 5, and between the concave portions 91 and 92, a rod having a substantially right triangular cross section is provided. A material 93 is interposed therebetween.

Therefore, with such a configuration, the backrest 7 can be rotated forward together with the seat 5 to a position where the backrest 7 faces the lower surface 1a of the leg 1, as in the first embodiment. Since it can be folded, it is possible to reasonably and effectively reduce bulk when packing and transporting or storing.

Moreover, in the use state, the rod 93 constituting the inclination angle adjustment mechanism 9 is interposed between the lower surface of the rear end of the seat 5 and the upper surface of the rear end of the seat support member 4. The seat 5 can be tilted forward. Moreover, since the cross section of this bar 93 has a substantially right triangle shape as shown in FIGS. 7 to 9, the rear end of the seat 5 can be adjusted by changing the position of the bar 93. The distance between the lower surface and the upper surface of the rear end portion of the seat support member 4 can be changed into three types. Therefore, it is convenient that the seat 5 can be set at a desired angle according to the user's physique and work content.

Note that the chair according to the present invention is not limited to a chair for learning, and may be, for example, a chair for office use.

Further, the legs may be provided with extensible supports, or may be constructed entirely of a pipe frame.

Further, the seat support member provided at the upper end of the leg may be a frame-shaped member made of a metal material.

Further, the hinge mechanism is not limited to the one described above, and various modifications can be made without departing from the spirit of the present invention.

Further, the configuration of the inclination angle adjustment mechanism, which is a component of the second invention, is not limited to the above-mentioned one, and may be, for example, as shown in FIGS. 10 to 14.

That is, the inclination angle adjustment mechanism 109 shown in FIGS.
．． A bar 193 having a rectangular cross section can be selectively engaged with the seat 192, and by changing the manner of engagement of the bar 193, the angle of inclination of the seat 5 can be changed. It has become.

In addition, the inclination angle adjustment mechanism 209 shown in FIGS.
1 is hinged through a hinge 292, and the bar 2
By changing the posture of the seat 91, the inclination angle of the seat 5 can be changed. It is also possible to further increase the number of adjustment stages by using a combination of this tilt angle adjustment mechanism 209 and the tilt angle adjustment mechanism 109.

The inclination angle adjustment mechanism 309 shown in FIG.
A screw shaft 392 is screwed into a nut 391 fixed to the rear end, and the upper end of the screw shaft 392 abuts and supports the lower surface 5b of the seat 5. Then, the screw shaft 3
An operating handle 393 is provided at the lower end of the seat 92, and the inclination angle of the seat 5 can be adjusted steplessly by rotating the operating handle 393 and screwing the screw shaft 392 up and down. It looks like this.

[Effects of the Invention] Since the first and second inventions have the above-described configurations, the backrest can be rotated together with the seat about the pivot point provided by the hinge mechanism. The backrest can then be moved to a position facing the lower surface of the legs.

Therefore, it is possible to significantly reduce the bulk when storing the product at a required location or when packaging and transporting the product.

In addition, if the backrest can be folded down to the top of the seat, the cushioning material for the backrest and seat may be thick, or the vertical dimension of the backrest may be large and the lower edge of the seat may be close to the seat. In such a case, the backrest may not be able to be tilted sufficiently, which would be an inconvenience. However, in the case of the present invention, the backrest and the seat are movable as one, so if the backrest is somewhat large and thick, Even if it is a small piece, it can be smoothly moved to the position of the lower surface of the leg without interfering with other members, and the whole can be made into a particularly compact form.

Furthermore, from this state, the seat is rotated rearward to raise the backrest, and the lower surface of the seat is engaged with the upper surface of the leg seat support member, thereby making it possible to use the device. Therefore, the effect of handling during use is much simpler compared to a case where the cross members to be fixed with bolts or the like are removed from the seat and then packed and transported.

Furthermore, in the second aspect of the invention, since the inclination angle adjustment mechanism is interposed between the dust and the seat support member, the inclination angle of the seat in the front-rear direction in the use state can be adjusted as appropriate. Therefore, when working at a desk for a long period of time, the seat can be tilted relatively far forward, allowing the user to take the optimal configuration depending on the mode of use. That is, according to such a configuration, an excellent effect can be obtained in that the so-called back pressure angle can be adjusted as appropriate depending on the physique and the content of the work.

[Brief explanation of the drawing]

1 to 5 show one embodiment of the present invention, FIG. 1 is an overall perspective view, FIG. 2 is an overall exploded perspective view, and FIG. 3 is an enlarged sectional view showing a hinge mechanism part. FIG. 4 and FIG. 5 are action explanatory diagrams. 6 to 9 show other embodiments of the present invention, in which FIG. 6 is a side view, FIG. 7, FIG. 8, and FIG.
The figure is an enlarged sectional view showing a portion of the inclination angle adjustment mechanism. FIGS. 10 and 11 are enlarged sectional views of a tilt angle adjusting mechanism portion showing still another embodiment. FIGS. 12 and 13 are enlarged sectional views of a tilt angle adjusting mechanism portion showing still another embodiment. FIG. 14 is an enlarged sectional view of a tilt angle adjusting mechanism portion showing still another embodiment. 1... Leg 3... Support 4... Seat support member 4a... Front end 5... Seat
5a... Front end 6... Crossbar 7
...Backrest 8...Hinge mechanism

Claims (2)

[Claims] (1) A leg with a seat support member provided at the upper end of the support, a seat removably placed on the seat support member of the leg, a backrest supported by the seat, and a front end of the seat. a hinge mechanism rotatably connected to the front end of the seat support member, the seat is rotated forward from the mounting position on the seat support member, and the backrest is placed between the legs. A chair characterized in that it is configured so that its lower surface can face each other. (2) A leg with a seat support member provided at the upper end of the support, a seat removably placed on the seat support member of the leg, a backrest supported by the seat, and a front end portion of the seat. a hinge mechanism rotatably connected to the front end of the seat support member; and a hinge mechanism interposed between the rear end of the seat and the seat support member for adjusting the mounting angle of the seat relative to the seat support member. and an inclination angle adjustment mechanism, the seat being configured to be able to rotate the seat forward from the position where it is placed on the seat support member so that the backrest can face the lower surface of the leg. A chair.