JP2780671B2 - Chair - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair suitably used in an office or a conference room.

[0002]

2. Description of the Related Art As chairs used in offices and conference rooms in recent years, there are known chairs in which a backrest can be tilted and the backrest and a seat are linked.

[0003] Conventionally, such a chair is composed of a main frame fixed to a leg, a back support rod supporting a backrest and a lower part pivotally connected to the main frame so as to be rotatable, and a seat. The main frame is provided with a seat receiving portion arranged so as to be slidable substantially horizontally in the front and rear direction, and the seat receiving portion slides forward when the back support rod is tilted rearward. It is known that a back support rod and the seat receiving portion are connected to each other so that the seat moves substantially horizontally forward as the backrest tilts rearward.

[0004] In addition, the main frame fixed to the legs,
The back support rod is pivotally attached to the lower part and the seat support part is pivotally mounted to the front part, and the back support rod is tilted rearward so that the seat support part also tilts rearward. There is also known a structure in which a support rod is connected to a rear portion of the seat receiving portion so that the seat also tilts rearward as the backrest tilts rearward.

[0005]

However, such chairs have a problem in the posture of the user when the backrest is tilted.

In other words, if the seat is tilted backward and the seat is moved substantially horizontally forward, the seat does not move in the vertical direction even if the seat back is tilted, so that the height of the line of sight does not change and Although he can concentrate on work, dialogue, meetings, etc., it is difficult to take his eyes off and take a relaxed posture. In addition, if the seat is tilted backward with the back of the seat back, the relaxed posture is easy to take, but the posture of the user is greatly inclined backward, so the height of the line of sight changes. Can't concentrate on meetings.

An object of the present invention is to solve these problems.

[0008]

In order to achieve the above object, the present invention employs the following configuration.

That is, a chair according to the present invention comprises a main frame fixed to a leg, a back support rod having an upper portion supporting a backrest and a lower portion rotatably supported by the main frame, and supporting a seat. And a seat receiving portion disposed above the main frame, a front support portion for supporting a front portion of the seat receiving portion by the main frame, and a rear portion of the seat receiving portion by the main frame. And a rear support portion supporting the seat frame, wherein the rear support portion is rotatably supported by the main frame and is connected to and supports a rear portion of the seat receiving portion. And connecting the rear connection member and the back support rod so that the rear connection member rotates with the rearward tilt of the back support rod. As the rod tilts backward, The rear coupling member rear portion of the seat receiving portion initially configured to push down next to the front, the Se支
In a position where the rod is not tilted, the rear connecting member is
To the main frame via a first rear pivot at the bottom,
At the upper part, via the second rear pivot shaft,
In front of and between the first rear rotation axis and the second rear rotation axis.
At a height position via a third rear pivot axis,
Each of which is rotatably connected to each other,
But on the main frame in front of the third rear pivot axis.
The second rear pivot shaft is pivotally mounted so as to be pivotable.
The first back pivot is located substantially directly above the rear support shaft.
The third rear pivot shaft is moved to the first rear
It is configured to rotate from the upper front to the lower front of the rotation axis.
It is characterized by having.

[0010] In addition to the above, a main frame fixed to the leg is provided.
And the upper part supports the backrest and the lower part
A back support rod rotatably supported by the in-frame and a seat
And placed above the main frame.
A seat receiving portion to be provided and the seat receiving portion by the main frame.
A front support portion for supporting a front portion of the main frame;
A rear support portion in which a rear portion of the seat receiving portion is supported by a
A chair comprising:
The seat is rotatably supported by the main frame and the seat
The rear connecting member, which is connected to and supports the rear part of the receiving part,
The rear connecting member and the back support rod,
The rear connecting member rotates with the rearward tilt of the support rod.
So that the back support rod tilts rearward,
The rear connecting member moves the rear part of the seat
In such a way that the front support portion is
Slide holder and protrusion protruding from the main frame
Front and rear at the front part of the seat receiving part at a position corresponding to the projection part.
A long hole extending in the opening direction and being open,
The front part of the seat receiving part can be slid on the slide receiver
At the same time as the projections advance into the slots.
The front part of the seat receiving part can slide only in the front-back direction
From the vicinity of the front end of the dorsal support rod.
A bearing is rotatably protruded from the side, and the bearing is
Attached to the bearing support provided on the side of the main frame
The front end of the back support rod so that it can move back and forth.
You may.

[0011] Specific embodiments of the front support portion
When supported rotatably by the main frame
Both are connected to and support the front part of the seat receiving part.
A front connecting member, and a lower portion of the front connecting member
The upper part of the main frame through the front pivot shaft
To the front part of the seat receiving part via the front rotation shaft of
And the back support rod is tilted.
The second front pivot axis is in the first previous position
It is configured so that it is located just above and slightly behind the drive shaft.
Can be mentioned.

[0012]

With the chair having such a structure, when the back support rod is tilted rearward, the seat receiving portion moves substantially horizontally forward until halfway, and thereafter tilts rearward. By adjusting the manner of leaning on the backrest, it is possible to select whether the seat should be moved substantially horizontally forward with the backward tilt of the backrest, or further tilted backward. This allows you to relax and continue working, interacting,
It is possible to select a posture in which the user can concentrate on the meeting or the like and a posture in which the height of the line of sight is changed and the mind is changed while changing the thinking, so that productivity in work, dialogue, a meeting, and the like can be improved.

[0013] Further, the rear support portion may be connected to the rear connecting member.
The main frame and the seat
And the back support rod are rotatably connected to each other.
Therefore, the rotation of the rear connecting member accompanying the tilting of the back support rod
Therefore, the rear part of the seat receiving part moves substantially horizontally forward halfway.
And then can be moved down, simple configuration
The angle between the backrest and the seat can be linked. Ma
In the position where the back support rod is not tilted, the second rearward rotation
The moving shaft is positioned substantially directly above the first rear rotation shaft.
The rear connecting member is rotated by the load from above.
And the rear part of the seat
Can be properly connected.

[0014] Further, the front support portion is provided with the slide receiver.
The front part of the seat receiving part is slidably supported in the front-rear direction through
In the case of a configuration that can be held,
Regardless of the height of the front part of the seat
it can. Further, the front support portion may be set so that the second support rod is not tilted via the front connection member at the position where the back support rod is tilted.
The front rotation axis is located immediately above and slightly behind the first front rotation axis.
When the main frame and the seat receiving portion are connected in this positional relationship, the front portion of the seat receiving portion does not move downward with the operation of the rear portion of the seat receiving portion. Can be properly supported.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

The chair in this embodiment is shown in FIGS.
As shown in FIG. 1, a main frame 1 fixed to a leg, left and right back support rods 3 for supporting a backrest 2, and a seat receiving portion 5 for supporting a seat 4, a front connecting member constituting a front supporting portion 8. The front link 6 is connected to the rear link 6 via a rear link 7 as a rear connecting member constituting the rear support portion 9.

The main frame 1 is fixed to an upper end of a leg, a beam 11 for continuously fixing left and right chairs, and the like, and has a housing shape with an open upper surface. From the side surface 1a, a front rotation shaft 12, which is a first front rotation shaft, and a rear rotation shaft 13, which is a first rear rotation shaft, extending horizontally horizontally are respectively projected outward.

The back support rod 3 is a pipe material having a substantially L-shape in a side view, and supports the backrest 2 via a backrest support portion 31 protruding inwardly and laterally from an upper portion 3a. The lower part 3 b forms a back support rod 32 and is connected to the main frame 1. A front pivot shaft hole 33 is formed near the front end of the back support rod portion 32, and a long rear link shaft hole 34 extending in the front-rear direction is formed further rearward.

The seat receiving portion 5 has a U-shaped cross section fixed to the lower surface of the seat 4 and has a front portion 5a and a rear portion 5b. Support part 51
Further, the rear shaft support portion 52 as a second rear rotation shaft is suspended. From the front shaft supporting portion 51 and the rear shaft supporting portion 52, a front seat receiving portion shaft 53 and a rear seat receiving portion shaft 54 project outward.

The front link 6 is an elliptical plate, and has a front rotation shaft hole 61 at a lower portion and a front seat receiving portion shaft hole 6 at an upper portion.
2 are drilled respectively.

The rear link 7 is a substantially right-angled triangular plate member. A rear rotation shaft hole 71 is formed in a lower portion, and a rear seat receiving portion shaft hole 72 is formed in an upper portion. A rear link shaft 73, which is a third rear rotation shaft, is projected outward at a height in front of and between the rear seat receiving portion shaft hole 72 and the rear seat shaft hole 72.

The connection of each member is performed as shown in FIG. First, the seat receiver 5 is arranged above the main frame 1. Next, the front link 6 is inserted through the front pivot shaft hole 61, the front pivot shaft 12 of the main frame 1 is inserted through the front pivot shaft hole 61, and the front seat receiving shaft 53 of the seat receiving unit 5 is inserted through the front seat receiving shaft hole 62. 1 and the seat receiving portion 5, and the rear link 7 is inserted into the rear rotation shaft hole 71 through the rear rotation shaft 1 of the main frame 1.
3 and the front seat receiving shaft 5 of the seat receiving portion 5 in the rear seat receiving shaft hole 72.
3 are attached to the main frame 1 and the seat receiving portion 5 while being inserted respectively. And the back support rod 32 of the back support rod 3
The front turning shaft 12 of the main frame 1 is
Into the rear link shaft hole 34 and the rear link shaft 73 of the rear link 7.
Are respectively attached to the front link 6 and the rear link 7 while being inserted. Lastly, a C-ring, an E-ring, or the like is fitted to the distal ends of the front rotation shaft 12, the rear rotation shaft 13, the front seat receiving shaft 53, the rear seat receiving shaft 54, and the rear link shaft 73, thereby connecting each connection. Hold the part. In this connection, at the position where the back support rod 3 is not tilted, the front seat receiving shaft 53 is slightly behind the front rotation shaft hole 61, and the rear seat receiving shaft 54 is slightly above the rear rotation shaft 13. The main frame 1, the back support rod 3, the seat receiving part 5, the front link 6, and the rear link 7 are respectively configured to be located rearward.

The operation of the chair configured as described above is performed as follows. When the back support rod 3 is tilted slightly backward, as shown in FIG. 4, the back support rod 3 rotates about the front rotation shaft 12, so that the rear link shaft 73 moves forward in the rear link shaft hole. While being moved downward, the rear link 7 is rotated counterclockwise in FIG. 4, so that the rear seat shaft 54 moves substantially horizontally forward with slight vertical movement. For this reason, since the seat receiving part 5 is pushed forward by the rear part 5 b, the entirety moves forward while the height of the front part 5 a is restricted via the front link 6. Further, when the back support rod 3 is further tilted rearward, as shown in FIG. 5, the rear link shaft 73 is pushed further downward to rotate the rear link 7, so that the rear seat receiving portion shaft 5
4 is moved downward until it is substantially the same height as the rear rotating shaft 13. Therefore, the rear portion 5b of the seat receiving portion 5 is pushed downward, and the front portion 5a is restrained in height via the front link 6, so that the seat receiving portion 5 tilts rearward.

In the chair having such a configuration, when the user tilts the backrest 2 backward, the seat 4 moves substantially horizontally forward halfway, and thereafter tilts rearward. By adjusting the manner in which the backrest 2 leans, it is possible to select whether the seat 4 should be moved substantially horizontally forward with the backward movement of the backrest 2 or the seat 4 should be further tilted backward. . For this reason, the original posture and the posture that can relax slightly without changing the height of the eyes and continue to concentrate on work, dialogue, meetings, etc.
By changing the height of the line of sight, it is possible to select a posture to relax while changing the thinking, and it is possible to improve productivity in work, dialogue, meetings, and the like. Further, the angle between the backrest 2 and the seat 4 can be appropriately linked with a simple configuration without having to largely change the conventional configuration. Further, when the back support rod 3 is not tilted, the rear seat receiving portion shaft 54 is located almost directly above the rear rotation shaft 13 in the rear link 7, so that the rear link 7 is rotated by a load from above. It is possible to appropriately support the rear portion 5b of the seat receiving portion 4 without raising the rear portion of the seat 4 with the initial movement. Further, when the back support rod 3 is not tilted, the front seat receiving portion shaft 53 is located slightly behind the front rotation shaft hole 61 in the front link 6, so that the rear link 7
Is rotated substantially 90 degrees and the rear portion 5b of the seat receiving portion 5 moves greatly, but the front link 6 also rotates greatly and the front portion 5 of the seat receiving portion 5 moves.
It is possible to link the predetermined backrest 2 and the seat 4 while maintaining the height of the front portion of the seat 4 appropriately without lowering the height of a.

As another embodiment of the present invention, as shown in FIG. 6 and FIG.
A projection 81 projecting upward from the main frame 1, an elongated hole 82 extending in the front-rear direction to the front portion 5 a of the seat receiving portion 5 at a position corresponding to the projection 81, and projecting upward from the main frame 1. And a slide receiver 83. The slide receiver 83 supports the front part 5a of the seat receiving part 5 so as to be slidable. In addition, the protrusion 81
The main frame 1 and the front portion 5a of the seat receiving portion 5 are connected to each other by entering and engaging with the long holes 82, and the sliding operation of the front portion 5a of the seat receiving portion 5 is performed only in the front-rear direction. .

With the chair having such a configuration, as shown in FIG. 8, even if the back support rod 3 is tilted, the front part 5a of the seat receiving part 5 slides only forward and backward while being attached to the slide receiver 83. Since it does not move and does not move up and down, it is possible to interlock the predetermined backrest 2 and the seat 4 while maintaining the height of the front part of the seat 4 appropriately. In this embodiment, the back support rod 3 is used.
Is rotatably connected to the rear link shaft 73 without using the rear link shaft hole 34 as an elongated hole, and a bearing 35 is rotatably protruded from the vicinity of the front end of the back support rod 3 to the side. Is attached to a bearing support 14 provided on the side surface of the main frame 1 so as to be movable back and forth. With such a configuration, when the back support rod 3 is tilted rearward, the rear link shaft hole 3
4 moves forward and downward, the front end of the back support rod 3 moves forward with the rolling of the bearing 35, but other operations are the same as those of the former embodiment, and the same operation and effect can be obtained. is there.

The structure of the present invention is not limited to the above-described structure. For example, in the former embodiment, the rear link shaft hole 34 of the back support rod 3 may not be a long hole, and the front rotation shaft hole 33 may be a long hole extending forward and backward. In the former embodiment, the front seat receiving shaft 53 may be a projection 81, and the main frame 1 may be provided with an elongated hole 82 at a position corresponding to the front seat receiving shaft 53, and may be slidably supported on the side surface . In addition, various modifications can be made without departing from the present invention.

[0028]

As described in detail above, the chair of the present invention
By adjusting how the user leans on the back,
The seat moves almost horizontally forward with the backrest tilting backward
Or tilt the seat further backwards.
You can choose between the original posture and the height of the line of sight.
Work a little relaxed without changing the
Change your posture to focus on talking, meetings, etc.
To change your thoughts and relax
Work, dialogue, and meeting productivity
It is possible to do. Also, the conventional configuration is greatly changed.
Suitable backrest and seat angle with simple configuration
It can be linked to. Also, the back support rod is tilted.
In the position where the second rear pivot shaft is not moved,
Structured to be located directly above the rotation axisBecause, Upward
The rear connecting member does not rotate due to the load from
And the rear of the seat receiving part does not rise
It becomes possible to connect appropriately. Also, the front support portion
The front part of the seat receiving part forward and rearward through the slide receiver.
By slidably supporting
Height of the front of the seat, regardless of the movement of the rear of the seat
Can be kept substantially constant.In addition, before
The support portion is provided in a predetermined positional relationship by the front connection member.
It is configured to connect the main frame and the seat receiving portion.
As a result, the front part of the seat
Can be properly supported so that it does not move downward.
Become.

As described above, the present invention has a special effect that the user can select whether the seat should be moved substantially horizontally or tilted together with the tilting of the backrest with a simple configuration. It is.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment of the present invention.

FIG. 2 is a plan view of the embodiment.

FIG. 3 is an exploded perspective view showing the connection of the embodiment.

FIG. 4 is a side view showing the operation of the embodiment.

FIG. 5 is a side view showing the operation of the embodiment.

FIG. 6 is a side view showing another embodiment of the present invention.

FIG. 7 is a plan view of the embodiment.

FIG. 8 is a side view showing the operation of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Main frame 2 ... Backrest 3 ... Back support rod 3a ... Upper part 3b ... Lower part 4 ... Seat 5 ... Seat receiving part 5a ... Front part 5b ... Rear part 6 ... Front connection member (front link) 7 ... Rear connection member (rear link) 8) Front support portion 9 Rear support portion 12 First front rotation shaft 13 First rear rotation shaft 53 Second front rotation shaft 54 Second rear rotation shaft 73 Third Rear rotating shaft 81: Projecting portion 82: Long hole 83: Slide receiver

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A47C 1/02-1/038 A47C 7/44

Claims (3)

(57) [Claims] 1. A main frame fixed to a leg, a back support rod which supports a backrest at an upper portion and is rotatably supported at a lower portion by the main frame, and a main frame which supports a seat and supports the seat. A seat support portion disposed above the front frame, a front support portion configured to support a front portion of the seat support portion by the main frame, and a rear support configured to support a rear portion of the seat support portion by the main frame. And a rear connecting member, wherein the rear supporting portion is rotatably supported by the main frame and is connected to and supports a rear portion of the seat receiving portion. The rear connection member and the back support rod are connected so that the rear connection member pivots together with the back support rod tilting rearward, and the rear support member is tilted rearward. Accompanying the rear connecting member is a rear portion of the seat receiving portion. At first, it is configured to push forward and then downward, and in a position where the back support rod is not tilted, the rear connection
The member is connected to the main frame via a first rear pivot shaft at a lower portion.
At the upper part, behind the seat receiving part via the second rear pivot shaft
The first rear pivot axis and the second rear pivot axis,
At the height of the back support via a third rear pivot axis
The rod is connected to each other so that it can rotate.
The main support rod is positioned in front of the third rear pivot shaft.
The second rear pivot
A shaft is located substantially directly above the first rear rotation shaft , and the third rear rotation shaft is moved with the tilting operation of the back support rod.
Is rotated from the upper front to the lower front of the first rear rotation shaft.
A chair characterized in that it is configured so as to: 2. A main frame fixed to a leg, a back support rod which supports a backrest at an upper part and is rotatably supported at a lower part by the main frame, and a main frame which supports a seat and supports the seat. A seat support portion disposed above the front frame, a front support portion configured to support a front portion of the seat support portion by the main frame, and a rear support configured to support a rear portion of the seat support portion by the main frame. And a rear connecting member, wherein the rear supporting portion is rotatably supported by the main frame and is connected to and supports a rear portion of the seat receiving portion. The rear connection member and the back support rod are connected so that the rear connection member pivots together with the back support rod tilting rearward, and the rear support member is tilted rearward. Accompanying the rear connecting member is a rear portion of the seat receiving portion. At first, it is configured to be pushed forward and then downward, and the front support portion is provided with a slide receiver and a projection portion projecting from the main frame, and the seat receiving portion at a position corresponding to the projection portion. The front part has a long hole that extends and opens in the front-rear direction, the front part of the seat receiving part is placed on the slide receiver and slidably supported, and the projection part is The front portion of the seat receiving portion is configured to be slidable only in the front-rear direction by entering the long hole, and a bearing is rotatably protruded laterally from near the front end of the back support rod. A chair in which a bearing is attached to a bearing receiver provided on a side surface of a main frame to support a front end of a back support rod so as to be able to move back and forth. 3. The front support section is mounted on the main frame.
Movably supported and coupled to the front of the seat receiver
A front connecting member supporting the lever,
The lower portion of the connecting member is connected to the main frame via a first front rotation shaft.
Frame, the upper part of the seat receiving part via a second front rotation shaft.
It is connected to the front part so that it can rotate
The second previous position at a position where the back support rod is not tilted.
The moving shaft is located just above and slightly behind the first front rotation shaft.
The chair according to claim 1 , wherein the chair is configured to be configured as described above.