JP4792233B2 - Chair - Google Patents

Description

The present invention relates to a rocking (reclining) chair in which a seat and a backrest are supported by a frame material .

  In a chair in which a seat and a backrest are supported by a frame structure composed of a bar material or a pipe material, the back tilt of the backrest is allowed by using elastic deformation of the frame structure. An example thereof is described in Patent Document 1.

In other words, in the chair of Patent Document 1, the frame structure includes left and right lower horizontal portions that are longitudinally placed on the floor, left and right forefoot portions that rise upward from the front end of the lower horizontal portion, and rearward from the upper ends of the left and right foot portions. The upper horizontal part that extends to the left and right and left hind legs raised from the rear end of the lower horizontal part. The seat is mounted on the upper horizontal part of the left and right, and the rear end of the upper horizontal part of the left and right is raised upward Connect the lower horizontal part to the lower back of the backrest, and connect the upper ends of the left and right hind legs to the upper horizontal part and connect the upper horizontal part to the mid-height back of the backrest. The backrest is tilted backward mainly by tilting the rear foot against the elasticity.
Japanese Patent Publication No. 8-15446

  By the way, in the rocking state (or reclining state) where the seated person is leaning on the backrest, when the seat moves forward in addition to the backrest tilting backward, the body of the person becomes easier to grow and relaxed and comfortable. Can be improved. And in the chair of Patent Document 1, when the backrest tilts backward, the seat also moves forward. However, in the configuration of Patent Document 1, the seat and the backrest are basically separated, so the advance distance of the seat is very small. It can be said that it is not effective enough to provide comfort to the seated person.

  The present invention has been made to improve the current situation.

The chair of the present invention comprises a seat and a backrest, a seat frame made of a bar material or a pipe material to which the seat is attached, and a back support frame made of a bar material or a pipe material to which the backrest is attached, together are integrally connected to the lower end of the rear end and backrest of the seat, the connection between the seat and backrest as whole or upper most portion of the backrest can be relatively after tilting relative to the seat part or are bent allowance portion in the lower part of the backrest forms, Thus, the backrest and a seated occupant leans on the backrest before Symbol seat and rear tilt is advanced dynamic by the same dimensions as the lower end of the backrest, that Basic configuration.

According to the first aspect of the present invention, in the basic configuration described above, the seat support frame is attached to a base frame that extends long below the seat in a side view and has a lower end that is grounded. The seat is moved back and forth by elastically deforming and pivoting back and forth with the lower end as a fulcrum, while the back support frame is provided on support frames arranged on the left and right sides of the seat or rises from a grounded base frame By making the back support frame and the support frame difficult to elastically deform than the seat support frame, when the seated person leans on the backrest, the backrest tilts backward and the seat moves forward. If possible.

According to a second aspect of the present invention, in the above basic configuration, the chair is arranged on both the left and right sides of the seat so that a column frame that stands up from a grounded base frame or is provided on a leg device extends above the seat surface. A seat support frame for supporting the seat is provided in a pendulum state at the upper ends of the left and right support frames, and the seat support frame rotates back and forth with the upper end as a fulcrum. The back support frame stands up from a base frame that is provided on the support frame or is grounded, and the support frame and the back support frame are elastically deformed even if a seated person leans on the backrest. However, the seat support frame is set to have such a strength that it can be easily rotated.

According to the invention of the present application, the seat can be moved forward in synchronization with the back tilt of the backrest while the chair is provided with a locking function by utilizing the elastic deformation of the frame material , so that the rocking can be achieved while having a simple structure. Comfort in the state can be improved.

Various modes are conceivable for the means for advancing the seat in conjunction with the rearward tilting of the backrest. When configured as in claim 1 , the seat support frame extends in the vertical direction in a side view and is easy to rotate. Thus, the seat can be easily deformed so as to rotate in the front-rear direction while supporting the seat, and therefore, the rearward tilting of the backrest and the forward movement of the seat can be performed smoothly.

When Tsu支seat with seat support frame as 請 Motomeko 2, by a like motion of the seat is so to speak the pendulum, it is carried out more smoothly advancing movement in conjunction with the backrest. In addition, there is an advantage that an armrest or a memo stand can be attached using a support frame.

  Next, an embodiment of the present invention will be described with reference to the drawings.

(1). First embodiment (FIGS. 1 and 2)
1 and 2 show a first embodiment which is a specific example of the invention of claim 2 . 1A is a perspective view of the chair, and as can be understood from this figure, the chair includes a seat 1, a backrest 2, and a frame structure 3 that supports the seat.

The rear end of the seat 1 and the lower end of the backrest 2 are integrally connected. FIG. 2A is a longitudinal side view of the chair. As shown in this figure, the seat plate 1 and the backrest 3 have cushions 1b and 2b on shell plates (seat plates and back plates) 1a and 2a , respectively. It has a structure. Of course, it is also possible to use only the shell plates 1a and 2a without the cushions 1b and 2b.

The backrest 2 tilts backward as a whole in a free state where no load is applied, and the lower part of the shell plate 2a (a height position at which a waist of a seated person hits) extends horizontally in front view. It is formed with a part 4 and the rearward tilt angle of the upper part is increased with the bending allowable part 4 interposed therebetween. Needless to say, the backrest 2 is bent around the bending allowable portion 4 in a side view, and as a result, most of the backrest 2 tilts backward relative to the seat 1.

  As means for constituting the bending allowance portion 4, the bending strength at the location of the bending allowance portion 4 may be reduced. Specifically, a horizontal thin portion may be formed, or a horizontal cut or slit may be formed. It is also possible to divide the shell plate 2b on the upper and lower sides sandwiching the bending allowance portion 4. Alternatively, it is possible to separate the backrest into two upper and lower members and connect them with pins (shafts) or hinges. Further, the connecting portion between the shell plate 1a of the seat 1 and the shell plate 2a of the backrest 2 may be a weakened portion or a pin connecting portion, whereby the connecting portion between the seat 1 and the backrest 2 may be bent. Is possible.

  The frame structure 3 is made of a steel round bar, and a support frame 5 rising above the seat 1 on the left and right outer sides of the seat 1, a base frame 6 continuous to the lower end of the support frame 5, and the support frame 5 A back support frame 7 that extends rearward from the vicinity of the upper end portion and wraps around the upper back of the backrest 2, a seat support frame 8 that extends downward from the vicinity of the upper end portion of the column frame 5 and wraps around the lower surface of the seat 1, and the rear of the base frame 6 There is provided an auxiliary frame 9 that rises forward from the end in a side view and extends horizontally in a portion of the back surface of the backrest 2 slightly above the bending allowance portion 4.

The front end portion of the base frame 6 extends to the vicinity of the front end of the seat 1, and the support frame 5 is inclined backward as viewed from the side. The support frame 5 and the base frame 6 are connected by a side reinforcing frame 10 that is inclined forward in a side view. Therefore, strut frame 5 is hardly elastically deformed (somewhat no problem be modified.). Further, the left and right support frame 5 are connected by a front reinforcing stay 11 at a position slightly below the seat 1.

  As shown in FIG. 1B, the upper end of the support frame 5, the upper end of the seat support frame 8, and the front end of the back support frame 7 are bent sideways, and three of these horizontal bent portions 5c, 7c, 8c are bent. The person is fixed to the joint member 12 by welding or the like. An armrest 13 is attached to the connecting plate 12.

It a front end of the upper end and the back support frame 7 of the upper end and the seat support frame 8 of the strut frame 5 may be welded together, also separates the joint member 12 in the vertical two parts, each in the upper and lower parts The bent portions 5c, 7c, and 8c may be sandwiched and fixed. Further, as shown in FIG. 1C, the back support frame 7 and the seat support frame 8 are integrated, or although not shown, the support frame 5 and the back support frame 8 are integrated, or the support frame 5 And the seat support frame 8 can be integrated.

  When using the joint member 12 as in the embodiment, the present invention is not limited to fixing the three members of the frames 5, 7, and 8 to the joint member 12, and a. The back support frame 7 and the seat support frame 8 are fixed to the joint member 12, and the support frame 5 is attached to the joint member 12 so as to be relatively rotatable; b. The seat support frame 8 is fixed to the joint member 12, and the back support frame 7 and the support frame 5 are attached so as to be relatively rotatable; c. The back support frame 7 may be fixed to the joint member 12, and the seat support frame 8 and the support frame 5 may be attached so as to be relatively rotatable. An optimal combination may be selected so that an appropriate elastic resistance is provided while ensuring an accurate back tilt of the backrest 2 and an accurate forward movement of the seat 1.

  Of the back support frame 7, the laterally long portion 7 a that wraps around the back of the backrest 2 is fixed to the back of the backrest 2, and among the seat support frame 8, the laterally long portion 8 a that wraps around the bottom of the seat 1 is the bottom surface of the seat 1. The laterally long portion 9 a which is fixed to the auxiliary frame 9 and located at the back portion of the backrest 2 is attached to the back surface of the backrest 2.

  As a means for attaching each of the horizontally long portions 7a, 8a, 9a, as shown in FIG. 2 (B), the holder member 14 fitted to the horizontally long portions 7a, 8a, 9a is fixed to the shell plates 1a, 2a with screws 15. As shown in FIG. 2 (C), it is fixed with screws 15 via a pressing member 16 that overlaps the laterally long portions 7a, 8a, 9a from the outside. As shown in FIG. 2 (D), the shell plate 1a , 2a, various methods can be employed, such as pressing and holding the boss portion 17 with the pressing plate 18. Each of the horizontally long portions 7a, 8a, and 9a may be attached in a state of being relatively rotatable with respect to the shell plates 1a and 2a.

In the above configuration, when a person who is seated leans on the backrest 2, as shown by a chain line in FIG. 2 (A), the auxiliary frame 9 is inclined motion before about its lower end, the back support frame 5 is slightly Further, the seat support frame 8 pivots forward with the upper end as a fulcrum so that the pendulum (or swing) swings, and thereby the seat 1 moves forward while the backrest 2 tilts backward. .

  In this case, since the rear end of the seat 1 and the lower end of the backrest 2 are integrally connected, the lower end of the backrest 2 and the seat 1 advance by the same distance (dimension). As shown in FIG. 2A, a stopper 19 that contacts the front reinforcing stay 11 is provided on the lower surface of the seat 2 in order to regulate the rearward tilt angle of the backrest 1 and the forward movement position of the seat 2.

In the present embodiment, the back support frame 7 and the seat support frame 8 and the auxiliary frame 9 is in elastic deformation portion, the auxiliary frame 9 is elastically deformed with a small force since the length (span) is long, also The seat support frame 8 is in a pendulum-like posture and is elastically deformed with a light force. Since the upper end 9a of the auxiliary frame 9 is located on the front side of the rear end 7a of the back support frame 7, when the seated person leans on the backrest 2, the lower portion of the backrest 2 moves to the front. As a result, the seat 1 reliably moves forward.

Note that the fact that the seat 1 is only supported by the seat support frame 8 and is not in contact with the front reinforcement stay 11 also contributes to the smooth forward movement of the seat 1 (the seat is interposed via a slider or roller). 1 can be supported by the front reinforcing stay 11 or the like.) Further, since the seat support frame 8 has a posture extending in the vertical direction when viewed from the side, the seat 1 hardly swings back and forth in the non-locking state, and therefore, stability in the non-locking state is also ensured. Can do.

  It is also possible to suspend the seat 1 with a plurality of seat support frames 8. Further, the bending allowance portion 4 may be positioned at a location where the seat 1 and the backrest 2 are connected. Since the backrest 2 tilts backward about the laterally long portion 7a of the back support frame 7 (the laterally long portion 7a also moves), the advance distance of the seat 1 increases as the position of the laterally long portion 7a increases. Therefore, the position of the horizontally long portion 7a may be set so that the forward distance of the seat 1 has a suitable dimension while taking into account the certainty of the backward tilting of the backrest 2.

(2). Second embodiment (FIG. 3)
FIG. 3 shows a second embodiment which is a specific example of claim 1 . (A) is a partially broken side view, (B) is a partial front view. In this embodiment, the seat 1 and the backrest 2 are schematically shown. In this embodiment, the frame structure 3 includes a support frame 5 that is arranged to be biased toward the rear side of the chair, and the support frame 5 is reinforced by a rear reinforcing frame 21.

As a feature of this embodiment, the seat 2 is supported from below by a seat support frame 8. When the seat support frame 8 tilts forward with its lower end as a fulcrum, backward tilt of the backrest 2 and forward movement of the seat 2 are allowed. Seat support frame 8 is attached through a stay 22 to the base frame 6 (or may be directly attached.). The base frame 6, the forefoot frame 23, the side frame 24, and the rear reinforcing portion 21 constitute a leg portion having a trapezoidal shape in side view.

(3). Third to fourth embodiments (FIGS. 4 to 5)
FIG. 4 shows a third embodiment which is a specific example of claim 2 . (A) is a schematic side view, (B) is a schematic front view.

In this embodiment, the seat support frame 8 is suspended from the upper end of the front column frame 5a in a rearward tilted position in a side view, and the back support frame 7 is mounted on the upper end of the rear column frame 5b that extends substantially vertically in a side view. Provided integrally. In this embodiment, rear support frame 5b is set to an intensity that hardly elastically deformed (it is also possible to provide a reinforcing member so difficult to elastically deform.). Seat support frame 8 is formed by bending the upper end of the front strut frame 5a to the rear filtrate side. Reference numeral 11a denotes a rear reinforcing stay.

FIG. 5 shows a fourth embodiment. This is also a specific example of claim 2. (A) is a schematic side view, (B) is a schematic front view. This embodiment is a modification of the third embodiment, and the difference from the third embodiment is that the seat support frame 8 is formed by bending the upper end of the front column frame 5a to the left and right inside, The upper portion of the rear column frame 5b is bent in an inverted L shape when viewed from the front.

In the embodiment of FIG. 4, the seat 1 is allowed to move forward by bending and deforming the seat support frame 8, but in the embodiment of FIG. 5, the seat 1 is moved forward by the seat support frame 8 and the front strut frame. This is allowed by torsional deformation (shearing) of the connecting portion 26 with 5a, and therefore, the seat support frame 8 is smoothly rotated back and forth with a light force. Therefore, a large chair child elastic resistance is the arrangement of FIG. 4, chair child elastic resistance small can I structure of Figure 5.

(4). Fifth to sixth embodiments (FIGS. 6 to 7)
FIG. 6 shows a fifth embodiment in which claim 2 is embodied . (A) is a schematic side view, (B) is a schematic front view. In this embodiment, the frame structure 3 is attached to a leg device 27 with casters, and the leg device 27 includes a foot material 27a made of a metal pipe (may be made of a bar material ). It has a four-leg system.

  On the other hand, the frame structure 3 includes front and rear support frames 5a and 5b, a back support frame 7 and a seat support frame 8, and the configuration thereof is basically the same as that of the third embodiment of FIG. 4 is different from FIG. 4 in that the front column frame 5a is inclined in a side view while the front column frame 5a is in a vertical posture in a side view in this embodiment. .

6th Embodiment shown in FIG. 7 is a modification of 5th Embodiment, (A) is a schematic side view, (B) is a schematic front view. The difference between the seventh embodiment and the sixth embodiment is that the support frames 5a and 5b, the back support frame 7 and the seat support frame 8 in the sixth embodiment are almost the same as in FIG. Te, in FIG. 7, the strut frame 5a, 5b and the back support frame 7 and the seat support frame 8 Togazu 5 is that it is almost the same form.

  However, in FIG. 5, the front column frame 5 a is in a rearward inclined posture in a side view, whereas in FIG. 7, the front column frame 5 a is in a vertical posture in a side view. The part support frame 5a and the seat support frame 8 overlap each other in a side view.

(5). Seventh to eighth embodiments (FIGS. 8 to 9)
FIG. 8 shows a seventh embodiment which is a specific example of claim 2 . (A) is a schematic side view, (B) is a schematic front view. In this embodiment, the frame structure 3 is attached to the leg device 27, and the leg device 27 has a configuration in which a pedestal comprising a gas cylinder 28 is supported by a plurality of branch rods 29, The frame structure 3 is attached to a support base 30 provided at the upper end of the cylinder 28. The frame structure 3 has the same form as that in FIG.

  FIG. 9 shows an eighth embodiment, where (A) is a schematic side view and (B) is a schematic front view. This embodiment is a modification of the seventh embodiment, in which the frame structure 3 of the seventh embodiment is replaced with the frame structure 3 of FIG. As can be understood from FIGS. 8 and 9, the present invention can also be applied to a swivel chair that can adjust the height of the seat 1 and the backrest 2. Although not shown, the present invention can also be applied to a fixed chair such as a theater chair or a stadium chair.

(6). Ninth embodiment (Fig. 10)
FIG. 10 shows a ninth embodiment in which claim 2 is embodied . (A) is the perspective view which displayed the seat 1 and the backrest 2 with the virtual line, (B) is a schematic side view. This embodiment is similar to the sixth embodiment shown in FIG. 7. The major difference from FIG. 7 is that the front support frame 8a is integrally provided on the front support frame 5a, and the rear support frame 5b. Further, the rear seat support frame 8 is provided, and the seat 1 is suspended by the front and rear seat support frames 8 'and 8.

  In this embodiment, the joint member 12 connects the laterally bent portion 5c at the upper end of the rear column frame 5b, the laterally bent portion 7c of the back support frame 7 and the laterally bent portion 8c of the seat support frame 8 with the back support. The laterally bent portion 7c of the frame 7 and the laterally bent portion 8c of the seat support frame 8 are formed to face each other, and both the bent portions 7c and 8c are arranged concentrically. Therefore, the seat support frame 8 is disposed inside the back support frame 7.

  In this case, both the back support frame 7 and the seat support frame 8 are preferably attached to the joint member 12 so as to be relatively rotatable. In this case, the elastic restoring force for returning the backrest 2 and the seat 1 from the locked state to the original state is mainly the front. Secured by the seat support frame 8. Note that various combinations of the frames 5, 7, and 8 can be attached to the joint member 12 as in the first embodiment.

In the present embodiment, the seat 1 is configured to be able to flip up and rotate most of the front side around the rear end portion (thus, the seat 1 is separated into two front and rear members ). For this reason, it is possible to stack a plurality of chairs back and forth (in order to prevent the legs of the front and back chairs from interfering with each other, as in FIG. 7, the left and right intervals of the front legs 27a and the left and right intervals of the rear legs) Are different. ).

  Further, the lower surface of the seat 1 is fitted into and removed from the horizontally long portion 8a ′ of the front seat support frame 8 so that the seat 1 can be supported by the front seat support frame 8 in a state in which the seat 1 is allowed to flip up and rotate. A concave engaging portion 32 is provided. When the center of rotation of the seat 1 is located behind the horizontally long portion 8a of the rear seat support frame 8, the concave engagement portion 32 is fitted to and detached from the horizontally long portion 8a of the rear seat support frame 8. good.

(7). Tenth embodiment (Fig. 11)
FIG. 11 shows a tenth embodiment in which claim 1 is embodied . In this embodiment, the backrest 2 is attached to the upper end of the back support frame 7 that rises upward so that it can tilt forward and backward, and the seat 1 is supported by the two front and back seat support frames 8.

In this embodiment, the back support frame 7 is held by the auxiliary rod 33 so as not to rotate and is essentially a rigid structure , and the elastic deformation that allows the back tilt of the backrest 2 and the forward movement of the seat 1 is not performed. The seat support frame 8 is mainly responsible. Accordingly, the seat support frame 8 is in elastic deformation portion. In this embodiment, the seat support frame 8 is provided with a bent portion 8a that allows the seat support frame 8 to expand and contract in the axial direction.

(8). Others The present invention can be embodied in various ways other than the above embodiment. For example, the forms of the back support frame and the seat support frame can be variously embodied as necessary. In addition, as a method for supporting the seat, it is possible to use a seat support frame suspended from above and a seat support frame supported from below. It is also possible to arrange a plurality of back support frames.

  Further, the rear end of the seat and the lower end of the backrest do not necessarily have to be connected over the entire length in the left-right direction, and may be connected in a state of jumping along the left-right direction. Further, the seat and the backrest may be manufactured separately and connected by another connecting tool.

When the back support frame, the seat support frame, and the reinforcing frame are provided as in the first embodiment, the horizontally long portion does not necessarily have to extend long over the entire length of the backrest or the seat.

It is a figure which shows 1st Embodiment. It is a figure which shows 1st Embodiment. It is a figure which shows 2nd Embodiment. It is a figure which shows 3rd Embodiment. It is a figure which shows 4th Embodiment. It is a figure which shows 5th Embodiment. It is a figure which shows 6th Embodiment. It is a figure which shows 7th Embodiment. It is a figure which shows 8th Embodiment. It is a figure which shows 9th Embodiment. It is a figure which shows 10th Embodiment.

DESCRIPTION OF SYMBOLS 1 Seat 2 Backrest 3 Frame structure 4 Bending allowance part 5,5a, 5b Post frame 7 Back support frame 8 Seat support frame 9 Auxiliary frame 13

Claims (2)

A seat and a backrest, a seat frame made of a bar material or a pipe material to which the seat is attached, and a back support frame made of a bar material or a pipe material to which the backrest is attached;
With the lower end of the rear end and backrest of the seat are connected together, the entire or upper most portion of the backrest of the seat and backrest so as to relatively after tilting relative to the seat It is bent allowance portion in the lower portion of the connecting portion or the backrest form, Therefore, the backrest and a seated occupant leans on the backrest before Symbol seat and rear tilt is advanced dynamic by the same dimensions as the lower end of the backrest,
The structure
The seat support frame is extended to the lower side of the seat in a side view and the lower end is attached to a grounded base frame, and the seat moves back and forth as the seat support frame rotates back and forth.
The back support frame is provided on a support frame arranged on the left and right sides of the seat or is raised from a grounded base frame, and has a strength that makes the back support frame and the support frame difficult to elastically deform than the seat support frame. By doing so, when the seated person leans on the backrest, the backrest tilts backward and the seat can be advanced,
Chair. A seat and a backrest, a seat frame made of a bar material or a pipe material to which the seat is attached, and a back support frame made of a bar material or a pipe material to which the backrest is attached;
The rear end of the seat and the lower end of the backrest are integrally connected, and the seat and the backrest are arranged so that the whole or most of the backrest can tilt backward relative to the seat. A bendable portion is formed at the lower part of the connecting portion or the backrest, and therefore when the seated person leans against the backrest, the backrest tilts backward and the seat moves forward by the same dimension as the lower end of the backrest.
The structure
On both the left and right sides of the seat, a column frame that stands up from a grounded base frame or that is provided on a leg device is arranged to extend above the seat surface, and the seat is suspended from the upper ends of the left and right column frames. The supporting seat support frame is provided in a pendulum-like state, and while the seat support frame rotates back and forth, the seat moves back and forth,
The back support frame is provided on the support frame or stands up from a grounded base frame. The frame is set to the strength to rotate easily,
Chair.

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