JP5485629B2 - Chair - Google Patents

Description

  The present invention relates to a chair that has a base fixed to a floor surface, a column that stands up from the base, and a seat above the column and that can be changed between a use state and a non-use state by tilting the seat.

  2. Description of the Related Art Conventionally, chairs and desks that are fixed in advance on the floor of a lecture room or the like are known. Such desks and chairs are mainly used in school lecture halls and international conference halls where many people are seated, and can secure the maximum number of seats in a limited space. There are advantages such as.

For example, the chair disclosed in Patent Document 1 has a structure in which a seat is attached to a back desk via a link mechanism. In this case, the back desk is used as a backrest, so when using the chair, If there is no passage between the desks and there is a seated person at the end of the desk, there is a problem that it is not possible to go through the seated person to the middle seat of the desk.
On the other hand, the chairs disclosed in Patent Document 2 and Patent Document 3 have a configuration in which the chair is erected on a base fixed to the floor surface, and the storage state tilts to a position close to the desk. Because the seat can be changed to a sitting state separated from the desk to sit down, the seat occupant leans forward while lifting his / her waist, not only when the chair is stored but also when in use. It is possible to secure a passage.

  However, these chairs require frequent maintenance of the movable parts of the link mechanism because of the complicated link mechanisms such as the main link and front legs that stand up from the base to the seat. The link mechanism is obstructive, for example, when the foot comes into contact with the movable link mechanism, and further, the space at the foot of the seated person is narrowed, which causes a non-free sitting posture.

JP-A-4-367622 Japanese Patent No. 2927712 Japanese Patent No. 3803642

The present invention relates to a chair that is fixed and arranged in advance on the floor surface, and the seat is configured to be movable with a simple configuration without using a conventional complicated link mechanism, so that a seated person can easily sit on the seat. It is an object of the present invention to provide a chair that can take a large space under the foot.

In order to solve the above-mentioned problems, the invention according to claim 1 of the present invention has a seat on an upper portion of a support column which stands up from a base fixed to a floor surface, and the support column is pivotally supported by the base. to, a chair of the strut and inclined freely form the front and rear direction, the top of said post, providing a支杆extending in the longitudinal direction, to stretch the provided et the front-rear direction to the支杆the front end of the guide member, to the upper end of the urging member for urging the vertically telescopically disposed et Re upper direction to the post, the front and rear portions of the lower surface of the seat, which, respectively it rotating pivotally supported With that
The urging member pushes up the rear of the seat, the front portion of the seat rotates and the guide member slides backward, and the seat is inclined obliquely,
Following the movement in which the rear part of the seat descends against the urging force of the urging member, the front part of the seat rotates and the guide member slides forward so that the seat becomes substantially horizontal. The use position in the state,
The chair is characterized by being deformable .

The invention according to claim 2, in claim 1 Symbol mounting of the chair, is erected a Se杆from the rear of the支杆, characterized in that fitted with backrest on the back rod.

According to a third aspect of the present invention, in the chair according to the first or second aspect, the support is composed of a pair of left and right tubes fixed to the upper ends of the columns, and the pair of left and right guide members are slid onto the tubes. The front portion of the lower surface of the seat is pivotally supported by a shaft that is movably inserted and connects the front ends of the pair of left and right guide members.

According to the first aspect of the present invention, the seat is moved from a substantially horizontal use state to a non-use state in which the seat is tilted forward with a simple configuration without using a conventional complicated link mechanism. Can be made.
In particular, it does not require a complicated link mechanism from the base to the seat, does not require frequent maintenance of the link mechanism, and only a support is raised below the seat, which obstructs the feet when sitting on the seat Since there is no such thing, the space at the foot is not narrowed, and it is possible to sit in a free posture with a wide suspension.

Further, the tilting of the standoff can be easily deformed into a chair in the accommodated state and the use state. As a result, when the chair is not in use, it is possible to make the chair close to the desk and secure a large passage behind the chair by tilting the column forward, while when using the chair, the column is tilted backward. Therefore, it is possible to use the chair with the chair pulled out.

Further, according to the invention described in claim 2 , it is possible to attach the backrest to the rear portion of the support with a simple configuration in which the backrest is raised from the rear portion of the support.

According to the invention described in claim 3 , it is possible to form a shaft for rotatably mounting the seat between the front ends of the pair of left and right guide members, and to form a substantially U-shaped guide portion. It is possible to integrally form a smooth sliding mechanism and a rotating mechanism of the seat.

Further , it is possible to pivotally support the front and the rear of the seat by a simple configuration in which a seat receiving plate having downward support pieces at the front and rear ends is formed on the lower surface of the seat.

Further, without exposing the urging member inside the standoff, it is possible to provide a high designability chair. Further, it is possible to prevent foreign matter from entering the inside of the column and to prevent foreign matter from adhering to the movable portion of the urging member.

It is a figure which shows the chair of this invention. (A) It is a figure which shows the accommodation state of a chair. (B) It is a figure which shows the drawer state of a chair. (C) It is a figure which shows the seating state of a chair. It is an exploded view of a chair. It is explanatory drawing which shows the non-use state of a seat. It is explanatory drawing which shows the motion of a seat. It is explanatory drawing which shows the use condition of a seat. It is a partially cutaway view showing the storage state of the chair. It is sectional drawing which shows the storage state of a chair. It is a partial cutaway figure which shows the drawer state of a chair. It is sectional drawing which shows the drawer state of a chair. It is a partial cutaway figure which shows the seating state of a chair. It is sectional drawing which shows the seating state of a chair. It is sectional drawing which shows the motion of a seat. It is sectional drawing which shows the motion of a seat.

As an example of the chair 1 of the present invention, as shown in FIGS. 1A, 1 </ b> B, and 1 </ b> C, a prismatic column 51 that stands up with respect to a base 91 fixed to the floor surface is provided in front of the base 91. A shaft 53 is pivotally supported by a pivot 99 so as to be tiltable forward and backward, and a back rod 53 is formed in a substantially vertical direction behind a support 54 formed in a substantially horizontal direction above the column 51. The chair 1 has a backrest 21 formed above the backrest 53, and the rear portion of the seat 31 located above the support column 51 is formed to be movable up and down, and the front portion of the seat 31 slides back and forth. By being formed freely, the seat 31 can be moved from a substantially horizontal use state to a non-use state in which the seat 31 is tilted forward, and (a) the chair 1 is stored by tilting the column 51 forward and backward. From the state 1a, (b) the chair 1 is pulled out 1b, and (c To the seating state 1c seated on the seat 31, a chair 1 which is capable of deformation.
In particular, the chair of the present invention has a simple structure for moving the seat 31 and has an advantage of not using a complicated link mechanism for moving the seat by following the inclination of the conventional support column.

Hereinafter, the configuration of the chair 1 of the present invention will be described in detail.
As shown in FIG. 2, the chair 1 of the present invention includes a member (left side in the figure) related to the movement of the seat 31, which includes a seat 31, a seat receiving plate 32, and a U-shaped guide portion 40, and a support 51 The body 50 (center in the figure) integrally formed with the support rod 54 and the back rod 53, the base 91, the tilting member 81, the urging member 70 (gas spring 70), and the cover member 61. It is roughly divided into a lifting member (right side in the figure).

First, each member arranged on the left side of the figure and its relationship will be described.
A substantially flat seat 31 on which a user is seated is fixed to a seat receiving plate 32 positioned immediately below the seat 31 in a state where the central portion of the seat 31 abuts.
The seat receiving plate 32 has a seat 31 attached to the upper surface thereof, and support pieces 36 and 37 that protrude downward are provided on the front and rear sides of the seat receiving plate 32, respectively. The shaft holes 33 and 34 penetrating through are respectively provided.

In the shaft hole 33 provided in the support piece 36 of the seat receiving plate 32, a horizontal cylindrical member (pivot 41) of the guide portion 40 made of a substantially U-shaped cylindrical body is pivotally supported. The front 32a of the seat receiving plate 32 is rotatably attached to 41.
Further, horizontal cylindrical members (guide members 42) are attached from the left and right ends of the pivot 41 via the holding portions 43, respectively, and are slidable back and forth into the interior 55 (cavity 55) of the support 54 described later. It is inserted.

Next, each member arranged in the center of the figure and its relationship will be described.
First, a body 50 serving as a chassis of the chair includes a prismatic column 51 that stands substantially vertically, a trapezoidal mounting member 56 that is integrally disposed above the column 51, and left and right of the mounting member 56. It consists of a pair of left and right support rods 54 extending in the horizontal direction and a back rod 53 extending gently upward from the rear of the support rod 54, and the backrest 21 is attached above the back rod 53.

  In particular, a hollow 55 is formed in the support rod 54 from the front end to the rear of the support rod 54, and the guide member 42 of the guide portion 40 is inserted into the inside 55 of the support rod 54. . Thereby, the U-shaped guide part 40 is formed to be slidable back and forth to the support 54.

In addition, a cavity 59 that penetrates the support column 51 in the vertical direction is formed inside the support column 51, and is configured to insert a biasing member 70 such as a gas spring 70, which will be described later.

Next, each member arranged on the right side of the figure and its relationship will be described.
A base member 91 (base 91) disposed in the lower part of the figure includes a flat plate-like fixing plate 96 and a cover portion 95 erected above the fixing plate 96.
The fixing plate 96 has mounting holes 97 at four corners, and the base member 91 is fixed to the floor surface using anchors 94 or the like.

Further, a tilt member 81 having a shoe shape is provided immediately above the base member 91, and a lateral shaft hole 82 formed in front of the tilt member 81 is formed in front of the cover portion 95 of the base member 91. A pivot shaft 99 is used to support the shaft hole 93 in the horizontal direction.

Inside the tilting member 81, there is a cavity 84 in the vertical direction. The gas spring 70 is inserted into the cavity 84, and a shaft support portion 74 provided at the lower end of the gas spring is formed inside the base member 91. The bearing 92 is pivotally supported using a pivot 98.

The gas spring 70 includes a cylindrical member (cylinder main body 72) that is long in the vertical direction and a rod 73 that protrudes downward from the inside of the cylindrical main body 72 to the outside. Oil etc. are sealed.
And the inside of the cylinder main body 72 is divided into two chambers by a piston 75 having an orifice (not shown), thereby generating a biasing force in a direction in which the rod 73 extended from the piston 75 always extends.

Therefore, by supporting the shaft support portion 74 at the tip of the rod 73 on the bearing 92 of the base 91, the gas spring 70 is rotatably supported in the front-rear direction and the cylinder body 72 always extends upward. An energizing force is generated.

On the other hand, the cylinder main body 72 and the shaft support portion 71 above the gas spring 70 are accommodated in a prismatic cover member 61 having a cavity inside. As a result, it is possible to prevent foreign matter from entering the support column 51 without exposing the biasing member 70 in the support column, and to prevent foreign matter or the like from adhering to the movable portion of the biasing member 70. It is.

In this state (the gas spring 70 is covered with the cover member 61), the shaft support portion 72 above the cover member 61 and the gas spring 70 is inserted above the support 51 after being inserted into the support 51. In the state of protruding to the shaft receiving portion 32, the shaft is integrally supported by using the pivot 35 to the shaft hole 34 of the support piece 37 formed at the rear 32 b of the seat receiving plate 32.

In other words, the gas spring 70, the cover member 61, and the seat receiving plate 32 are pivotally supported, and in particular, the rear portion 32b of the seat receiving plate 32 is caused by the upward biasing force of the gas spring 70. In this configuration, it is always pushed upward.

Further, an outwardly protruding stopper 62 formed at the lower end of the cover member 61 is regulated inside the support column 51 to prevent the cover member 61 from jumping upward and falling off. Yes.
Similarly, an outwardly protruding stopper 45 formed at one end of the guide member 42 is restricted by a stopper 58 (not shown) formed in the interior 55 of the support rod 54, and the guide member 42 is outward. It is prevented from jumping out and falling off.

Next, the operation of the seat 31 in the chair of the present invention will be described.
As shown in FIG. 3, a shaft support portion 74 provided on the rod 73 of the gas spring 70 is supported by a pivot shaft 98 to a bearing 92 inside the base (not shown), and rotates with respect to the base 91. The cylinder body 72 that is freely (tiltable) and above the gas spring 70 generates an urging force upward.
On the other hand, the shaft support portion 71 provided on the cylinder main body 72 above the gas spring 70 is pivotally supported by the pivot shaft 35 in the shaft hole 34 at the rear 32b of the seat receiving plate 32 while being accommodated in the cover member 61. The rear 32b of the seat receiving plate 32 is pivotable and always pushed upward.

At this time, the front 32a of the seat receiving plate 32 is pivotally supported to the pivot 41 of the guide portion 40, and the seat receiving plate 32 pivots upward with the pivot 41 of the seat receiving plate 32 as a fulcrum. As a result, the guide member 42 of the seat receiving plate 32 is slid toward the inner rear side of the support 54, and as a result, the seat 31 and the seat receiving plate 32 are maintained in a substantially upright state.

Thus, the shaft 41 for rotatably mounting the seat 31 between the front ends of the guide member 42 by slidably mounting the pair of left and right guide members 42 to the pair of left and right pipe members (supports 54). It is possible to form the sliding mechanism and the rotation mechanism of the seat 3 integrally with the substantially U-shaped guide portion 40.

Further, the front and rear of the seat 31 can be pivotally supported by a simple structure in which the seat receiving plate 32 having the downwardly supporting pieces 36 and 37 at the front and rear ends is formed on the lower surface of the seat 31, respectively. It is.

Next, when the seat 31 and the seat receiving plate 32 are erected, when the rear of the seat 31 is pushed down, as shown in FIG. 4, the cylinder main body 72 of the gas spring 70 is pushed down and contracted, and the seat receiving plate 32. The rear part 32b of this will descend.
Along with this, the front 32a of the seat receiving plate 32 rotates about the pivot 41 and a force for moving the seat receiving plate 32 forward is generated, so that the guide member 42 of the seat receiving plate 32 is supported by the support 54. The inside 55 is slid forward.

Further, as the seated person sits, as shown in FIG. 5, the seat 31 is lowered, the cylinder main body 72 of the gas spring contracts, and a stopper 45 formed at the rear end of the guide member 42 is provided with a support. By abutting against a stopper 58 formed in front of the inside 55 of 54, the sliding of the seat receiving plate 32 is restricted, and the seat 31 and the seat receiving plate 32 are in a substantially horizontal state.

Thus, the operation of the seat 31 follows the operation in which the rear of the seat 31 descends, and the front of the seat 31 moves forward, so that the seat 31 is movably deformed (variable) into a substantially horizontal state. It is.
On the other hand, when standing up from the seating state, it goes without saying that the seat 31 returns to a substantially vertical state by following the movement of the rear of the seat 31 moving backward and moving forward.

Next, a series of operations from the retracted state 1a of the chair through the pulled-out state 1b to the sitting state 1c due to the tilt of the support column 51 and the tilt of the seat 31 will be described.

First, the stowed state 1a of the chair will be described.
As shown in FIG. 6, the chair storage state 1 a herein refers to a non-use state in which the seat 31 stands substantially vertically and a state in which the support column 51 is tilted forward with respect to the base 91. In this state (stored state), since the entire chair enters the space below the desk surface located in front of the chair, a passage through which a person can pass is secured behind the chair.

Generally, in a lecture room where a plurality of desks are continuously arranged in the front-rear direction, it is necessary to minimize the distance between the front and rear desks and accommodate the maximum number of people in a limited space. However, if a plurality of desks are arranged in the front-rear direction, the distance between the front and back desks is inevitably reduced, so that it is difficult to secure a space (passage) for a person to pass between the chair and the desks behind. .
Therefore, by tilting the unused chair forward, it is possible to store the unused chair close to the desk and to secure a large passage behind the chair. And it is efficient that the user of a chair pulls out an unused chair (chair in a storage state) and sits down each time.

That is, the storage state 1a in the chair of the present invention is a state in which the gas spring 70 pivotally supported by the base 91 extends upward as shown in FIGS. The rear 32b is lifted to hold the seat 31 substantially vertically, and the tilting member 81 in the base 91 is pivotally supported 99 in front of the pivotal support 74 of the rod 73 of the gas spring. As a result, the tilting member 81 is axially rotated forward, and as a result, the entire chair maintains a forward tilting posture.

In this case, since the seat 31 of the chair enters the lower side of the desk surface 15 and the back surface 21 of the chair is located in front of the rear end position of the base 91, a large space (passage) is formed behind the chair. is there.

In addition, the stopper 62 formed at the lower end of the cover member 61 that covers the cylinder main body 72 of the gas spring comes into contact with the stopper (inwardly protruding portion) inside the column 51, so that the cover member 61 comes off the column 51. This can be prevented, and further, the extension of the gas spring 70 can be restricted.

Next, the chair drawer state 1b will be described. As shown in FIG. 8, the chair pull-out state 1 b here refers to a non-use state where the seat 31 stands substantially vertically and a state where the support column 51 is tilted backward with respect to the base 91.
The seated person holds the chair back 21 tilted forward in the stowed state 1a and pulls it backward, so that the tilting member 81 inside the base is pivoted about the pivot 99 as shown in FIGS. Rotate backward (tilt), and the entire chair tilts backward via the column 51. At this time, the gas spring 70 is slightly contracted, and the lower surface of the tilting member 81 is brought into contact with the lower surface of the base 91 to restrict the backward tilt of the chair 1.

At this time, the seat 31 stands substantially vertically with respect to the support column 51. However, since the support column 51 tilts backward as the chair tilts backward, the standing angle of the seat 31 becomes gentle and about 45 degrees in side view. Is set to an angle of In this state, the seated person enters the front of the seat 31 and sits with the buttocks in contact with the seat 31, so that the rear 31b of the seat 31 is pushed down and the front 31a of the seat 31 moves forward. As shown in FIG. 10, the seat 31 is in a substantially horizontal use state.

  In the chair pulled out state 1b, the gas spring 70 still exerts an urging force, and the stopper 62 of the cover member 61 of the gas spring is regulated inside the column 51, so that the tilt member of the column 51 is tilted. 81 has the force which rotates the front axis | shaft 99 as a fulcrum. For this reason, when the hand is released from the chair in the pulled-out state 1b, the chair is again tilted forward and returned to the stored state 1a.

Next, the sitting state 1c of the chair will be described.
In the state where the chair is pulled out, the seated person stands in front of the chair and sits on the seat, so that the seat is lowered and the gas spring 70 is most contracted, as shown in FIGS. Is the horizontal state of the seat 31, that is, the seated state.
As the rear 31b of the seat 31 descends, the gas spring 70 contracts, and the guide member 42 inside the support rod 54 moves forward to bring the seat 31 into a horizontal state. It is possible to sit at a great distance.
When the seated person stands up and leaves the seat, the seat 31 is automatically lifted substantially vertically by the upward biasing force of the gas spring 70, and the storage state 1a in which the column 51 tilts forward. It goes without saying that it will be migrated.

Thus, when the chair is not used, the chair 51 of the present invention can be tilted forward so that the chair is close to the desk and a large passage can be secured behind the chair, while the chair is used. Sometimes it is possible to seat the column 51 tilted backwards.
In particular, the seat 31 can be configured to be movable with a simple configuration without using a conventional complicated link mechanism, so that a seated person can easily sit down, and a large space can be taken even after sitting. Furthermore, since only one support is required from the base 91 to the seat 31, it is possible to provide the chair 1 with a simple design and high design.

Furthermore, the chair 1 of the present invention can easily form a passage behind the chair 1 by horizontally moving the seat 31 forward in the sitting state 1c.
For example, a rear desk is located behind the seated chair 1, and when a person tries to pass behind the seated person, it is necessary to secure a passage between the chair and the desk.
In this case, it is difficult to secure the passage unless the seated person stands up and returns the chair 1 to the stowed state 1a, but the chair 1 of the present invention is slightly forward with the seated person sitting. By bending, the column 51 tilts forward following the movement of the seated person, so that the backrest 21 tilts greatly and a large passage can be formed behind the chair 1.

That is, as shown in FIG. 12, by the action of the gas spring 70, an urging force that tilts the column 51 forward is exerted together with an urging force that pushes up the seat 31. Therefore, when the seated person leans forward, the support column 51 tilts forward, the front of the seat 31 tilts forward, and the rear of the seat 31 slightly lowers. As a result, the seat 31 slides in the horizontal direction. It becomes.

Thereby, since the backrest 21 inclines forward greatly, it is possible to ensure a big channel | path between the backrest 21 and a back desk. In particular, it is possible to move the seat horizontally without substantially changing the height of the seat 31, and in a state where a natural seating posture is maintained, the entire chair is moved forward to secure a passage in the rear. It is possible.

Further, the chair 1 of the present invention may be configured such that a large space can be formed in front of the chair when the chair 1 is pulled out and then inserted between the desk and the chair. For example, FIG. As shown in Fig. 1, after the chair 1 is pulled out, the seat 31 is inserted between the desk and the chair, and then the front end 31a of the seat 31 protruding forward is pushed backward by the seated person's calf. The tip 31a of 31 may be pushed further backward to form a space between the seat plate and the desk.

That is, the guide member 42 is configured to be slidable further rearward by providing an allowance for the amount of insertion of the guide member 42 into the support 54 in the normal drawer state 1b, so that the chair is pulled out. The tip 31a of the seat 31 can be moved further backward. At this time, the gas spring 70 is further extended upward, whereby the rear end portion 31b of the seat 31 is pushed up and rotated forward to make the seat 31 more vertical.

As a result, the seated person can stand between the desk and the chair. When the user sits again, the seat 31 naturally returns to its original state if the leg is removed from the tip 31a of the seat 31. Since it returns and faces upward diagonally, the seated person can sit down smoothly.

As described above, the chair of the present invention moves the seat 31 from a substantially horizontal use state to a non-use state in which the seat 31 is tilted forward with a simple configuration without using a conventional complicated link mechanism. be able to. In particular, there is no need for a complicated link mechanism from the base 91 to the seat 31, and frequent maintenance of the link mechanism is not required, and only when the support column 51 is erected below the seat 31, Because it does not get in the way of your feet, you can sit in a free posture with your legs wide, without narrowing the space at your feet.

In any case, the chair 1 of the present invention is configured such that the front 31a of the seat 31 is configured to slide forward and backward and rotate, and the rear 31b of the seat 31 is configured to move up and down and rotate freely. The present invention is not limited to the above-described embodiment as long as the seat 31 can be changed to a storage state 1a in which the seat 31 is in a substantially vertical state and a seating state in which the seat 31 is in a substantially horizontal state. Various changes can be made without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 1 Chair 21 Back 31 Seat 31a Seat front 31b Seat rear 32 Seat receiving plate 32a Seat receiving plate front 32b Seat receiving plate rear 33 Axle hole 34 Axle hole 35 Axis 36 Support piece 37 Support piece 40 Guide part 41 Axis 42 Guide member 43 Holding part 50 Body 51 Post 53 Back support 54 Support 55 Inside of support (hollow)
56 Shaft support member 58 Stopper 59 Cavity 61 Cover 62 Stopper 70 Biasing member (gas spring)
71 Axis support 72 Cylindrical body 73 Rod 74 Axis support 81 Inclining member 82 Axis hole 84 Cavity 91 Base 92 Bearing 93 Axis hole 95 Cover part 96 Fixing plate 97 Mounting hole 98 Axis 99 Axis

Claims (3)

A chair having a seat on an upper portion of a support column standing up from a base fixed to a floor surface, pivotally supporting the support column on the base, and tilting the support column in a front-rear direction, the top of said post, providing a支杆extending in the longitudinal direction, a front end of the guide member which expands and contracts to provided et the front-rear direction to the支杆, the strut vertically to telescopically disposed al Re on to the upper end of the urging member for urging in a direction, the front and rear portions of the lower surface of the seat, their respective rotating freely by pivotally supported,
The urging member pushes up the rear of the seat, the front portion of the seat rotates and the guide member slides backward, and the seat is inclined obliquely,
Following the movement in which the rear part of the seat descends against the urging force of the urging member, the front part of the seat rotates and the guide member slides forward so that the seat becomes substantially horizontal. The use position in the state,
The chair is characterized by being deformable . Wherein from the rear of支杆is erected the Se杆, characterized in that attached to the backrest to the back rod, according to claim 1 Symbol mounting chair. The support is composed of a pair of left and right tubes fixed to the upper portion of the support column, and a pair of left and right guide members are slidably inserted into the tubes, and the seats are connected to shafts connecting the front ends of the pair of left and right guide members. characterized in that for supporting the front portion of the lower surface of the chair of claim 1 or 2.

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