JP2927712B2 - Lecture room 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 for a lecture room mainly used as a chair in a lecture room of a university or a chair for a reporter in a conference room.

[0002]

2. Description of the Related Art Conventionally, as a chair for a lecture room of a university or the like,
A chair in which a chair is horizontally swingably fixed to a support of a desk via an arm, such as a chair shown in "Automatic storage device of chair in desk with chair" in JP-B-56-50562. In some cases, the direction of the swing axis is swingably fixed about an axis parallel to the left-right direction. These examples are shown in FIG.

That is, the chair 101 shown in FIGS. 9A and 9B is similar to the chair disclosed in Japanese Patent Publication No. 56-50562, and FIG. 9A is a side view and FIG.
(B) is the figure seen from the back. FIG. 9 (c),
The chair 103 shown in (d) is a chair in which the direction of the swing axis is changed, and FIG. 9 (c) is a side view and FIG. 9 (d) is a view seen from the rear.

As shown in FIG. 9 (b), the chairs 101a and 101b can swing back and forth about a substantially vertical axis via arms 107a and 107b on a support 105 arranged substantially in the middle of the chairs. ing. And this arm 107
Has a built-in spring mechanism (not shown) for urging the chair 101 forward. When the user sits on the chair 101a, as shown in FIG. 9A, the user moves from the position shown by the two-dot chain line to the position shown by the solid line as shown by the arrow P,
A gap is provided between the table 109 and the top plate 111 for inserting the legs.

On the other hand, the chairs 103a and 103b
As shown in (c), the arm 127 is set with a horizontal axis 125 located below the support column 123 of the desk 121 as a fulcrum.
a, 127b so as to be able to swing back and forth. The arm 127 also has a built-in spring mechanism (not shown) for urging the chair 103 forward. And chair 101
9 (c) when the user sits on the chair 103a.
As shown in (2), swing from the position shown by the two-dot chain line to the position shown by the solid line as shown by the arrow Q to secure a gap for inserting the legs between the desk 121 and the top plate 129.

As described above, according to the chair 101 shown in FIG.
When a person passes behind the chair 101, it may be moved in the direction opposite to the arrow P. Also, when the chair 103 is moved in the direction opposite to the arrow Q, a person can pass behind.
For this reason, when many chairs and desks are arranged like a lecture room, the chairs 101 and 103 are suitable.

However, the chairs 101 and 103 have a common problem (the chair 101 will be described below, but the chair 103 also has a corresponding problem). That is, since the chair 101 is fixed to the support 105 of the desk 109 via the arm 107, it is extremely difficult for a person with the arm 107 to sit and leave. In other words, the chair 107a is obstructed from the right direction and the chair 101b is obstructed from the left direction, and it is difficult to take a seat.

Further, although the chair 101 is movable as described above, the gap between the front end 130 of the seat and the top plate 111 of the desk 109 is not so large. So, chair 10
When seated at 1, the user is forced to perform a cramped operation of sitting with his legs sunk into the gap. This cramp can be solved by extending the movable range of the chair rearward and widening the gap between the desk 109 and the chair 101, but this reduces the number of desks that can be arranged in the lecture room. Alternatively, raise the desk 109 (or lower the chair 101).
Then, the gap is widened and it is easy to take off and take a seat, but this is the balance between the dimensions of the desk and chair (for example, if the height of the
A chair with a seat height of 420 to 430 mm is considered optimal for a 00 mm desk).

As chairs for the lecture room, in addition to those shown in FIG. 9, chairs described in Japanese Patent Publication No. 58-47903, entitled "Jumping Chairs", and Japanese Patent Laid-Open Publication No. Hei 4-376622. Is well known. In these chairs, the chair in FIG. 9 was fixed to a desk used by those sitting on the chair,
The difference is that it is fixed to the desk behind the chair. An example of this type of chair is shown in FIG. FIG.
The chair 131 shown in FIG. 10A is similar to the chair disclosed in Japanese Utility Model Publication No. 58-47903, and the chair 133 shown in FIG.
Shows a standing-type chair disclosed in Japanese Patent Application Laid-Open No. 4-376622.

In these chairs 131 and 133, the chair and the desk corresponding to the chair are separated from each other.
Is not limited to the left or right direction as in the chairs 101 and 103 shown in FIG. But,
Also in the chair 131 of FIG. 10A, the gap between the tabletop 135 of the desk and the front end 139 of the seat 137 is narrow, so that a tight posture is forced as in the chair of FIG. In addition, when sitting on the chair 131, the seat 137 is first set up substantially vertically, and like the person R, stands in front of the seat 137 and then sits down.
It is necessary to perform a more cramped operation than the chairs 101 and 103 in FIG.

The chair 1 shown in FIG.
33. A significant difference between the chair 133 and the chair 131 is the movement of the seat 141. 13 in the chair 131
7 was swung with the rear part 143 as a fulcrum. On the other hand, the chair 133 has a seat 141 in which the front end 145 is directed downward and the weight is supported by a link mechanism including two arms, a seat receiver, and a bracket fixed to a desk at the rear. It is moved as shown by arrow S from a state in which the surface is directed forward (to the left in FIG. 10) to a state in which it is substantially horizontal.

When seated on the chair 133, the person T stands in front of the seat 141 in the upright state, and when the person T leans down with his / her weight on the seat 141, the seat 141 moves as shown by an arrow S, and the seat is seated. Complete. That is, at the time of seating, as with the chair 131, although the front end 145 of the seat 141 is protruded forward, the movement is performed almost without shortening the distance from the top plate 147 as indicated by the arrow S. Follower T is chair 13
There is no need to take the cramped posture of sitting on one.

[0013]

However, the chair 133
According to the above, when another person T 'is passed while seated, the seated person T'
Must stand out. That is, the chair 133
In the chair 131 as well, since the chair 133 is fixed to the desk 151 at the rear, it is necessary to secure a space between the top plate 147 and the chair 133 to pass the person T '. Also, for the same reason, the space between the front and back desks is
It is narrowed by structures 153, 155, etc. for supporting the chair 133. For this reason, the seated person T floats down,
Just moving the seat in the opposite direction of the arrow S does not ensure sufficient space for the passer T 'to pass.

Such a situation often occurs in a room where desks are often closely arranged in a horizontal direction, such as a lecture room. This is not only annoying for a person standing, but also because only one person passes, all the people sitting on the chair 133 serving as a passage stand up, and the person sitting behind has a very high front. It becomes hard to see.

This problem is caused by the chair 10 shown in FIG.
At 1,103, it does not normally occur. This is because, as already described, the entire chair including the structures corresponding to the structures 153 and 155 can move forward, and a space can be secured between the chair and the desk behind.

The present invention has been made in view of the above problems, and has the advantages of easily passing the people of the chairs 101 and 103, the advantage of being able to sit on the chairs 131 and 133 from either side, and the chair 133 alone. It is an object of the present invention to provide a chair that has the advantage of sitting down without taking a cramped posture.

[0017]

A lecture room chair according to the present invention, which has been made to achieve the above object, has a backrest and a seat, and includes a desk fixed to a floor together with a main desk. The chair for the lecture room used in the lecture room
Behind the desk, fixed to the floor at a predetermined interval from the desk,
When the fixed part supporting the chair and the backrest are supported,
In addition, the fixed part can swing back and forth around the horizontal axis.
Backrest support portion fixed to the backrest support portion
A movement restricting portion for restricting the swing angle with respect to
From the end to approximately the center of the seat in the front-rear direction, the seat is
A seat supported from the back and one end near the front end of the seat
The seat bearing about an axis parallel to the left-right direction of the seat located at
And the other end is a main ring fixed to the fixed portion so as to be swingable.
Link and one end of the seat located near the rear end of the seat receiver.
The bearing is supported around an axis parallel to the left and right direction, and the other end is
An auxiliary link swingably fixed to the backrest support portion;
The rear end of the seat supports the front end while pulling the front end of the seat back.
A substantially vertical and the seat urging unit for urging the said seat in a direction in which the unused state which is a state of being pulled upward, the moving range of the upper Symbol seat, the seat is against the back凭 as a point It is characterized by comprising a seat regulating portion for regulating between a seated state and the unused state.

[0018]

Further, the lecture room chair according to claim 2 is
The lecture room chair according to claim 1, further comprising a backrest urging portion for urging the backrest forward in a direction in which the backrest moves, via the backrest support portion. It is characterized by having.

Further, further lecture room chair according to claim 3, in lecture room chair according to claim 1 or claim 2, is swung over Kise凭backward the seat the seat In the state, the main link takes a substantially vertical posture.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A lecture chair (hereinafter, also simply referred to as a chair) according to the first aspect of the present invention is a chair of a type having a seat and a backrest and fixed to a floor surface by a fixing portion. It has a basic configuration. Features include a mechanism for moving substantially the entire chair back and forth, a mechanism for moving only the seat in a seated state substantially perpendicular to the backrest, and a mechanism for moving the seat to an unused state (unused state). There are two moving mechanisms.

In the unused state, the seat is pulled up rearward with the front end as a fulcrum while the front end is pulled rearward. A mechanism for moving the entire chair includes a moving unit, while a mechanism for moving the seat includes a seat supporting unit that supports the seat so that the seat can be shifted to at least two states of a seated state and an unused state. A seat urging portion that urges the seat in a direction in which the seat becomes unused through the seat support portion, and a movement range of the seat via the seat support portion, a seated state,
And a seat regulating portion that regulates between the unused state. The moving part supports a fixed part supporting the chair and a backrest.
As well as swinging back and forth with respect to the fixed part.
And a backrest support portion. The movement restriction section
By regulating the swing angle of the backrest support with respect to the fixed part
And regulate the amount of movement of the entire chair in the front-rear direction. Fixed part
Is fixed to the floor at a specified interval behind the desk.
The pivot axis of the backrest support is oriented in the left-right direction,
The angle of the backrest when swung back is adjusted to the angle when seated
Become. The seat support mainly consists of the following three parts
Have been. That is, the first is the front-back direction from the front end of the seat
With a seat support that supports the seat from the back side of the seat surface almost to the center
Yes, the second one is located near the front end of the seat, left
The bearing is supported around an axis parallel to the right direction, and the other end is
The main link is fixed to be swingable.
Around the axis parallel to the left and right direction near the rear end of the seat
Axle is supported, and the other end is swingably fixed to the backrest support.
It is a supplementary link that has been set. In other words, the seat support is 3
And the back supporting the main link and auxiliary link
A link mechanism is constituted by the back support.

The method of seating on an unused chair is as follows. First, the entire chair positioned in front is moved backward. This movement is performed by the moving unit,
Since the moving unit is disposed below the seat, there is no obstacle on the left and right, such as the arm 107b of the chair 101a in FIG. In addition, the rear end of the seat is pulled up by the seat urging portion. Accordingly, a large space is created between the desk and the chair.

Next, the user walks into this space from any direction on either side of the chair. As described above, since this space is large, there is no need to slide the legs into the gap between the desk and the chair when walking. Also, it is possible to stand upright after entering, and it is not necessary to bend down. When standing facing forward, the seating surface (the surface that supports the hips when seated) faces the hip direction.

Then, the buttocks are brought into contact with the seat surface, and the seat is made substantially perpendicular to the backrest while lowering the hips. In this case, an operation of setting the seat to the seated state is performed, and the seating is performed simultaneously. Of course, the operation of putting the seat in the seated state may be performed by hand. Thus, the seating is completed. When a person passes behind while seated, the seated person lifts his hips and moves the entire chair forward. Then, the entire chair including the structure supporting the backrest and the seat corresponding to the structures 153 and 155 shown in FIG. 10 is moved, so that a space equivalent to the unused state is created behind the chair, and the person can be moved. You can pass.

To leave the seat, it is sufficient to reverse the seating. That is, first, when the user stands up, the seat is brought into an unused state by the seat urging unit. Then, it is only necessary to step out from any direction on either side. When the entire chair is moved forward, it returns to the initial state.

As described above, according to the chair of the first aspect, it is possible to take a seat or leave a seat from either side. When the seat is not seated, the front end of the seat is pulled rearward by the seat urging portion, and the rear end is in a state of being flipped upward. A large space is created between the desk and the desk, making it very easy to sit. Furthermore, when another person passes behind while seated, the seated person only has to sit down and move the entire chair forward, and does not need to stand up.

[0028] Incidentally, the term "substantially the entire chair", the solid of constant section or the like, and mechanisms for fixing the chair to the floor, the remaining major portion excluding the armrest or the like, but is not taken up e.g. small in the present ( Seats, backrests, and configurations that support them). In addition to the above, as long as the effects described below are not impaired, a configuration that does not move back and forth may be increased, or the armrest may be moved back and forth.

[0029]

[0030]

[0031]

Note that the fixed portion is installed on the floor because the backrest support portion is required to have a space for passing a passer behind when the backrest support portion is swung forward. The area immediately below the rear end (the front end for the occupant) is appropriate.
In this case, the backrest support portion stands substantially vertically on the floor when not in use, and is inclined rearward when seated.

The lecture room chair according to the second aspect of the present invention is further provided with a backrest urging portion for urging the backrest forward through the moving portion. Therefore, as long as no external force is applied, the chair is moved substantially entirely forward. Therefore, in the chair described in claim 1, when a passer is passed behind, it is necessary to not only lift the hip but also move the backrest forward. Since the backrest urging portion moves the backrest forward, there is no need for the user or passer to move the backrest.

Further, since the backrest biasing portion is biased, when the user stands in the space between the desk and the chair, the seat comes into contact with the buttocks. When the subordinate seat is changed from the unused state to the seated state, there is no need for the user to positively push the buttocks rearward against the seat. In other words, it is easier to take a seat.

The chair lecture room of claim 3, claim
In 1 or claim 2 chairs, in the seated state
Is arranged so that the main link takes a substantially vertical posture.
You.

[0036]

Therefore, the chair according to the third aspect has a structure that is advantageous for supporting the weight of the occupant. That is, for example, in the chair 131 shown in FIG. 10, the seat 137 is in a state close to a cantilever when seated, and the portion 1 supporting the seat 137 is provided.
A large moment is applied to 43 depending on the weight of the person sitting thereon. On the other hand, according to the chair, the main link is substantially vertical in the seated state.

[0038]

An embodiment of the present invention will be described below with reference to the drawings. First, FIG. 1 is a three-view drawing showing a chair 1 for a lecture room (hereinafter simply referred to as chair 1) according to an embodiment of the present invention. 1A is a front view, FIG. 1B is a right side view, and FIG. 1C is a plan view. And FIG.
In (a), the left chair 1a represents an unused state, and the right chair 1b represents a seated state.

As shown in this figure, the chair 1 is a chair used together with a desk 7 having a top plate 5 fixed to the floor via a support 3, and the chair 1 itself is also fixed to the floor by a fixing portion 9. ing. The fixing section 9 is fixed to the floor slightly behind the front end of the desk 7. The chair 1 has a backrest 11,
The backrest 11 can swing together with the backrest support portion 13,
It is supported by. The seat 15 to which the buttocks abut when seated,
It is movable with respect to the backrest 11, and is substantially perpendicular to the backrest as shown at 15b.
The posture can be changed to two states, that is, a state of facing in the same direction as 1a. In addition, although there are also conventional chairs in which the seat is made variable with respect to the backrest, many of them are flipped up so that the front end of the seat faces upward. On the other hand, the seat 15 of the chair 1 is greatly different in that the rear end thereof is flipped up so as to be directed substantially upward, and the front end thereof is drawn toward the backrest support portion.

Next, details of the chair 1 will be described with reference to FIG. FIG. 2 is an exploded perspective view of the chair 1 as appropriate. As shown in the figure, the backrest 11 is fixed with a hollow backrest support portion 13 having a hollow prism shape.
A rotating box 21 formed by bending a sheet metal into a substantially U-shape is fixed. A through hole is formed in the rotating box 21, and the rotating box 21 is swingably fixed to the fixed portion 9 by the main shaft 23. A key groove (not shown) is formed in the main shaft 23. By aligning this key groove with a key groove (not shown) formed in the fixing portion 9 and hitting a key, the main shaft 23 itself is formed. It is impossible to rotate. A main link 25 is also supported on the main shaft 23 in addition to the rotary box 21. The main link 25 is a hollow prism-shaped member, and has a bracket 27 at the lower end for inserting the main shaft 23. The bracket 27 in which the coil spring 29 as the backrest urging portion of the present invention is inserted is put into the inside of the rotating box 21, and the rotating box 21 and the bracket 27 are positioned by the rotating bush 31. It is mounted on the fixed part 9 and supported by the main shaft 23. Here, one end of the coil spring 29 is hung in a hook hole 33 formed in the rotating box 21, and the other end is fixed to the main shaft 23 with a screw 35. It is biased in the direction of swinging.

The opposite side of the main link 25 from the bracket 27 is pivotally supported by a seat 37 for supporting the seat 15. Seat 3
Numeral 7 supports the seat 15 from the side opposite to the seating surface 19 (that is, substantially below the seated state). The walls are erected at intervals. The main link 25 is sandwiched between the two plate-like members, and is supported by a square shaft 39. The hole into which the square shaft 39 is inserted is the main link 2
5 has a substantially square shape corresponding to the cross-sectional shape of the square shaft 39, and the seat receiver 37 has a circular shape large enough to allow the square shaft 39 to be loosely inserted.

At each end of the square shaft 39 loosely inserted into the circular hole, one coil spring 41 is fitted from the outside of the two plate-like members of the seat 37, and the cover 43 is further fitted from the outside. Is covered. The cover 43 includes a bottomed cylindrical member (hereinafter, referred to as a cap 45) and a columnar member (hereinafter, referred to as a column portion 47) disposed therein. The cap 45 covers the coil spring 41 and has a hole in which one end of the coil spring 41 is locked. The outer diameter of the cylindrical portion 47 is slightly smaller than the circular hole of the seat 37, and a square hole for inserting the square shaft 39 is formed in the shaft portion. The other end of the coil spring 41 is inserted into a hole formed in the plate member of the seat receiver 37,
As a result, the coil spring 41 urges the seat receiver 37 against the cover 43 in a direction in which the rear portion of the seat receiver 37 flips upward.

That is, the main link 25, the square shaft 39, and the cover 43 are integrated, while the seat 37 is swingable with respect to the three members. It is biased in the direction of flipping up the rear. At the rear of the two plate-shaped members of the seat 37, another pair of through holes is provided in parallel with the circular hole through which the square shaft 39 passes. An auxiliary link 51 is pivotally supported by the round shaft 53 in this through hole. The auxiliary link 51
Is pivotally supported by an auxiliary shaft 57 on a substantially U-shaped bracket 55 provided substantially at the center of the backrest support portion 13 in the longitudinal direction. Both ends of the auxiliary shaft 57 are supported without applying an urging force with respect to the seat support 37 and the backrest support portion 13 which are respectively supported.

According to the above description, the seat 37 (and thus the seat 15) forms a link mechanism with the main link 25, the backrest support 13, the auxiliary link 51, and the seat 37 itself. However, the length of these four members (specifically, the length between each shaft support position)
Are different from each other and are arranged in the order of the seat support 37, the auxiliary link 51, the backrest support portion 13, and the main link 25.
Is moved while changing the posture.

The stoppers are provided so that each part which is urged by the coil springs 29 and 41 has a constant posture. The coil spring 29 urges the four members forming the link mechanism forward (toward the desk 7), and the stopper 61 provided on the fixed portion 9 regulates the swing angle in this direction. The stopper 63 provided on the fixed part 9 also regulates the swing angle in the opposite direction.
It is. The rotating box 2 is attached to these stoppers 61 and 63.
The swing angle in the unused state and the swing angle in the seated state are defined by the abutment of 1. On the other hand, stoppers for defining the attitude of the link mechanism are provided on the seat 37, which will be described later.

The movement of the chair 1 having the above configuration will be described with reference to FIG. 3 are side views of the chair 1, and FIG. 3A shows an unused state.
3B shows a state in which the backrest support portion 13 is swung rearward (to the right in this drawing), and FIG. 3C shows a state in which the seat 15 is further moved from the state shown in FIG. 2 shows a state in which the user is moved relatively to the vehicle and is seated. Although these three figures are independent from each other, they are arranged so that three sets of desks and chairs in the lecture room can be regarded as being arranged vertically in the lecture room.

In the unused state as shown in FIG.
The backrest support portion 13 urged by the coil spring 29 is swung toward the desk 7. This swing angle is at a position where the tip of the rotating box 21 contacts the stopper 61. At this time, the seat 15 is biased by the coil spring 41 and is in a posture substantially parallel to the backrest support portion 13. A large space is created behind the chair 1 between the chair 1 and the desk.

In this state, when the backrest 11 is swung as shown by the arrow U against the bias of the coil spring 29, the state becomes as shown in FIG. This swing angle is at a position where the rear part of the rotating box 21 contacts the stopper 63. Even in this state, the seat 15 is
1 and is substantially parallel to the backrest support portion 13.

When the seat 15 is moved relative to the backrest support portion 13 by the link mechanism from the state of FIG. 3B against the bias of the coil spring 41 as shown by the arrow V in FIG. As shown in c), the seat 15 is substantially perpendicular to the backrest 11, and is in a seated state. At this time, the main link 25 takes a substantially vertical posture.

With respect to the chair 1 capable of such movement,
Stoppers for restricting the position and posture of the seat 15 with respect to the backrest support portion 13 will be described with reference to FIG. FIG. 4 is a view in which the chair 1 is cut at a plane bisecting the chair 1 in the left-right direction and the periphery of the seat 37 is enlarged. In FIG. 4, in order to clarify the function of the stoppers, the stopper 37 is used as a reference.
That is, as shown in FIGS.
Is moved by a link mechanism or the like together with the seat 15 (not shown in the figure). In this figure, the seat receiver 37 is fixed on the figure, and only the movement of the main link 25 and the auxiliary link 51 is shown. The solid line shows the angles of the main link 25 and the auxiliary link 51 in the seated state and the two-dot chain line shows the unused state.

The stopper is formed between two plate-like members 37d (only one in the back direction is shown in the figure) standing upright on the seat 37 described above. The stopper 65 is a plate-like member bent in an L-shape, and is disposed at the rear end of the plate-like member 37d. Auxiliary link 5 when seated
1 comes into contact with the stopper 65 and is restricted to the angle shown by the solid line. On the other hand, the stopper 67 is provided with a buffer member 70 substantially at the center of the flat plate 69,
It is arranged substantially at the center in the front-rear direction of 7d. In an unused state, the auxiliary link 51 comes into contact with the stopper 67 and is regulated at an angle as shown by a two-dot chain line.

By restricting the swing angle of the auxiliary link 51 in this way, the backrest support portion 13
The postures of the main link 25 and the seat 15 are also uniquely determined. That is, when the auxiliary link 51 comes into contact with the stopper 65, the angle with respect to the backrest 11 is kept substantially vertical, and when the auxiliary link 51 comes into contact with the stopper 67, the seat 15
Is substantially parallel to the backrest support portion 13.

FIG. 5 shows an example of use of the chair 1. 5 are side views of the chair 1, and FIG.
(A) is a situation when the person M is seated, and (b) of FIG.
FIG. 5C shows a state in which the person M is seated, FIG. 5C shows a state in which another person N passes behind the person M while sitting in the chair 1, and FIG. The chair 1 in the state is shown.

First, when seating as shown in FIG. 5A, the backrest 11 is swung in the direction of arrow W. When the backrest 11 is swung, not only the backrest 11 but also the entire chair 1 excluding the fixing portion 9 swings, so that a space where M can walk between the desk 7 and the chair is created. This space is larger than a normal chair because the front end of the seat 15 is drawn toward the backrest support 13 by the bias of the coil spring 41.

When entering the space, the coil spring 29
As a result, the entire chair 1 excluding the fixing portion 9 is swung toward the desk, and the seat 15 comes into contact with the buttocks of M. When M puts weight on the seat 15 and falls down, the seat 15 is moved against the bias of the coil spring 41, and the state shown in FIG. In this state, the auxiliary link 51 is
5, and the seat 15 is in an extremely stable state.

When leaving the seat, the reverse may be performed. That is, when M rises, the seat 15 is folded by the urging of the coil spring 41, and the link mechanism is folded.
The state shown in FIG. In this state, since the gap between the seat 15 and the top plate 5 of the desk 7 is wide, the user can easily stand up and easily walk to either the left or right side of the chair. When M starts to walk from the front of the chair 1, the entire chair 1 swings in the direction of the desk 7 around the fixed portion 9 by the bias of the coil spring 29.

When another person passes behind the chair 1 while seated, the arrangement shown in FIG. When the user sits down as M does, the entire chair 1 swings in the direction of the desk 7 to make room behind the chair 1. That is, there is no need to stand up every time another person N passes, as in the chair shown in FIG.

In the unused state, a space is created behind the chair 1 such that the people N1 and N2 can pass each other as shown in FIG. 5D. As described above, the chairs 1 and 10 shown in FIG.
3 has the effect of the chair 133 shown in FIG. 10B, in which the seat can be taken off and on from the left and right, and the user can sit without taking a cramped posture.

The chair 1 is advantageous as a structure for supporting the weight of the occupant. That is, the chair 13 shown in FIG.
In 1, the seat 137 is in a state close to a cantilever when seated, and a large moment is applied to the portion 143 supporting the seat 137 due to the weight of the person sitting thereon. On the other hand, according to the chair 1, since the main link 25 is substantially vertical in the seated state, a large moment is not applied as in the chair 131, and the sitting state is stabilized.

In the lecture room and the press conference room, desks and chairs are arranged in a matrix on a rectangular horizontal floor, as well as floors with slopes and tiers. The chair 1 can easily cope with such a floor shape, although the desk and the chair are arranged in an arc shape in a plan view. That is, in the chair 133 as shown in FIG. 10, since the chair 133 is supported by the desk 151 on the rear side, the mounting position of the chair 133 and the desk 151 when the floor has a slope or a stepped shape is provided. Need to be changed. In addition, if it is a fan shape, the number of desks before and after does not match, or the desk at the rear may not be directly behind the desk, and it is difficult to arrange the chairs as shown in FIG. . On the other hand, the chair 1 is fixed to the floor and the fixed position is close to the desk, so that it can be applied in the same manner as a horizontal floor if it is a tiered floor, and a case where the slope floor is very steep. Except as it can be applied. Even in the case of arranging them in an arc shape, they can be arranged without any problem because they have nothing to do with the desk behind.

Although the chair 1 according to one embodiment of the present invention has been described above, the present invention is not limited to this embodiment and can be implemented in various modes. Chair child 1 and substantially the same
Shows the chair to achieve the effect in FIG. In the chair 71 shown in FIG. 6 (a), the seat support is replaced with the backrest support 7 in the form of a sheath.
3 and an arm 75 slid in the backrest support portion 73
And a main link 77. On the other hand, FIG.
In the chair 81 shown in (b), the seat support is eliminated, and the seat 89 is received by the frames 87c and 87d supported by the main link 83 at the front end and the backrest 85 at the rear end. The backrest 85 has the rear ends of the frames 87c and 87d,
Guide portions 91c and 91d for guiding along the backrest 85 are provided.

FIG. 7 shows an example of use of the chair 71. 4 are side views of the chair 71, and FIG.
FIG. 7A shows a state in which a person M is seated on a chair 71, FIG.
FIG. 7B shows a state where the person M is seated, FIG.
FIG. 7D shows a state in which another person N passes behind when the person M is seated, and FIG. 7D shows the chair 81 in an unused state.

As shown in the figure, the chair 71 can be used similarly to the chair 1. That is, in the unused state, the seat 93 is flipped up so that the rear end thereof is upward, and the seat 93 can be seated (and left) in an easy posture as shown in FIG. In the chair 71, the backrest support portion 73 is urged in the same manner as the backrest support portion 13, but the seat 93 is urged by the coil spring 95 charged in the backrest support portion 73. This is achieved by urging the protrusion 75 in the direction in which it protrudes.

Accordingly, if the weight is applied as shown in FIG. 7 (b), it is possible to sit down in a stable state as in the chair 1, and as shown in FIG. Another person N can pass behind the chair. In the unused state, a space is created behind the chair 71 such that the people N1 and N2 can pass each other as shown in FIG. 7D. The coil spring 95 is used in the chair 71 as the backrest urging unit, but another urging member such as a gas spring may be used.

FIG. 8 shows an example of using the chair 81. The four diagrams shown in FIG. 8 correspond to the four diagrams of FIG.
That is, FIG. 8A shows a state where the person M is seated on the chair 81, FIG. 8B shows a state where the person M is seated, and FIG. FIG. 8 (d) shows the chair 81 in an unused state when the other person N passes behind.

As shown in this figure, when the chair 81 is not in use, the ends of the frames 87c and 87d are
Is jumped up along. That is, the main link 83, the frames 87c and 87d, and the guide portions 91c and
The link mechanism is composed of the backrest support portion 97 and the backrest support portion 97. In the chair 81, the backrest support portion 97 and the seat 89 are urged in the same manner as the chair 1. Follow Chair 8
1 can be used similarly to the chair 1. That is,
In the unused state, the seat 89 is flipped up, and the user can sit (and leave) in an easy posture as shown in FIG.

When the weight is applied as shown in FIG. 8B, the user can sit down in a stable state as in the chair 1. Moreover, in the chair 81, the seat 89 is connected to the main link 8
3 and the guide portions 91c and 91d, which are more stable and superior in strength as compared with the chairs 1 and 71.

As shown in FIG. 8C, another person N can pass behind the chair 81 only by lifting the hips of the chair 81. In the unused state, the chair 81 can be moved as shown in FIG. 8D. People can easily pass behind.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a chair 1 according to one embodiment of the present invention.

FIG. 2 is an exploded perspective view showing the structure of the chair 1 of the embodiment.

FIG. 3 is an explanatory view showing a state in which the chair 1 of the embodiment swings.

FIG. 4 is an explanatory view showing the operation of stoppers 65 and 67 of the chair 1 of the embodiment.

FIG. 5 is an explanatory view showing how to use the chair 1 of the embodiment.

6 is a perspective view showing an overview of chair child 71 and 81.

FIG. 7 is an explanatory view showing an example of use of a chair 71.

FIG. 8 is an explanatory view showing a usage example of a chair 81.

FIG. 9 is an explanatory view showing conventional chairs 101 and 103 and examples of their use.

FIG. 10 is an explanatory view showing conventional chairs 131 and 133 and examples of their use.

[Explanation of symbols]

1 ... Lecture room chair 3 ... Prop 5 ... Top plate
7 ... desk 9 ... fixed part 11 ... backrest 13 ... backrest support part 15 ... seat 19 ... seat surface 25 ... main link 29, 41 ... coil spring 37 ... seat support 51 ... auxiliary link 61, 63, 65, 67 ... Stopper

Claims (3)

(57) [Claims] 1. A lecture room chair mainly provided in a lecture room, comprising a backrest and a seat, and a desk fixed to the floor, wherein the chair is fixed to the floor behind the desk at a predetermined distance from the desk. Sa
And a fixing portion for supporting the chair and the backrest, and the fixing portion has a left-right direction.
A backrest support portion fixed to be swingable back and forth around an axis, and a swing angle of the backrest support portion with respect to the fixed portion is regulated;
A movement restricting portion, extending from a front end of the seat to a substantially center in the front-rear direction of the seat,
A seat support that supports the seat from the back side of the seat surface, and one end of the seat is located near the front end of the seat support in the left-right direction.
The bearing is supported around an axis parallel to
A main link fixed to be swingable to the left and right ends of the seat positioned near the rear end of the seat receiver.
The bearing is supported around an axis parallel to
An auxiliary link swingably fixed to the holding portion, and the rear end of the seat is pulled forward while the front end of the seat is pulled rearward.
A seat urging unit for urging the said seat in a direction in which the unused state which is a state of being pulled upward as a fulcrum, the movement range of the upper Symbol seat, substantially perpendicular the seat is against the back凭
A chair for a lecture room, comprising: a seat control portion that controls the seat between a seated state and an unused state. 2. A chair lecture room of claim 1, through the upper Symbol backrest support section, the back凭付pressing portion which is the back凭forward biases the the back凭the direction of movement A chair for a lecture room, further provided. 3. An apparatus according to claim 1 or lecture hall chair according to claim 2, when the seat is swung over Kise凭rearward to the seated state, the main link, a substantially vertical posture A chair for a lecture room, which is adapted to be taken.