JP2573365Y2 - Desk and chair - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a large number of chairs arranged in a theater or a conference hall, etc., and in particular, a backrest can be turned to be tilted to a substantially horizontal state so that a seated person at the back can use it. The present invention relates to a chair that can be used as a desk.

[0002]

2. Description of the Related Art Conventionally, as a desk and chair of this type, those proposed in Japanese Patent Application Laid-Open No. Sho 58-69510 and Japanese Patent Publication No. Sho 61-30564 previously proposed by the present applicant have been proposed. is there.

[0003] The former proposal is to raise a backrest having a desk deck on the back surface thereof through a slider while standing upright with respect to the left and right columns, and then to lower the backrest to a substantially horizontal state. The deck of the backrest abuts on the upper ends of the right and left columns, and the stopper arm of the lock mechanism pivotally attached to the back of the deck automatically engages with the step on the rear surface of the left and right columns by the bias of the torsion spring. The back of the deck is supported at an angle like a cheek stick. With this, the deck of the backrest is held in a substantially horizontal state,
It can be used as a desk. In this state, the deck is pushed down slightly forward, and the stopper arm is turned off against the torsion spring to remove it from the stepped portion. By lowering through the slider, the deck is joined to the rear surfaces of the left and right columns, and the backrest is slightly inclined backward and returns to a state where it can be used as a chair.

In the latter proposal, a backrest with a deck is provided so as to be capable of turning up and down with respect to left and right supports by four contact links, and the center of gravity of the backrest generated by the positional relationship of the fulcrum associated with the rotation of the four contact links. Utilizing the movement, the backrest is held in an upright state in which the backrest is slightly inclined and in a substantially horizontal falling state.

[0005]

By the way, in the case of the conventional desk-cum-chair having the above-mentioned structure, in the case of the former, first, the backrest with the deck is tilted down in a substantially horizontal state, and the lock retention during the use of the desk is unstable. If someone leans against the front of the deck or accidentally pushes up the rear of the deck with your knees, etc., the deck will flutter forward and down, and the documents on the deck will slide down, and the stopper arm will step down. There is a possibility that the lock may be released from the lock state. In order to return the backrest to its original standing state as a chair, it is necessary to push down the deck to the front lowering state and turn the stopper arms on both sides on the back side against the torsion spring by hand to remove it from the step. It was necessary and the work was troublesome.

In the latter case, the backrest with the deck is held in a standing state in which it is slightly inclined backward by a four-contact link and in a substantially horizontal falling state, so that troublesome work such as unlocking operation is not required. Although it is simple, but there is no lock mechanism, the fixed holding when using the desk with the backrest with the deck in a substantially horizontal state as described above is unstable with only the 4-contact link, and the front end of the deck is pushed backward. If the back of the deck is accidentally pushed up with a knee or the like, the link may move and the backrest may tilt, and the documents on the deck may slide down. There is also a risk that play may occur due to the unstable holding and hanging of the device.

Further, in the above-mentioned conventional proposal, when the backrest with a deck is tilted in a substantially horizontal state and used as a desk, the front / rear position of the deck cannot be adjusted, and a seated person in the rear row seats cannot write or use the desk. When working too far to lean forward, or too close to be cramped, and trying to secure enough passage space between the front and rear rows, it is not possible to increase the depth of the deck There was a problem.

The present invention has been made in view of the above circumstances,
The purpose of the present invention is that the backrest with a desk deck can be easily and reliably locked and held in a tilted state slightly inclined backward and a substantially horizontal overturned state by a rotating operation. There is no inconvenience that the backrest with the deck moves out of the way, and it is extremely safe, and can be easily unlocked by operating one petal in any locked state. It is an object of the present invention to provide a desk and chair which is extremely operable and enables a backrest with a deck to be turned upside down.

A second object of the present invention is to make it possible to adjust the front-back position of the backrest with a desk deck when the desk is used in a state where the backrest with a desk deck is tilted in a substantially horizontal state. The present invention provides a desk and chair that enables a seated occupant to perform work such as writing in a comfortable posture, and that can secure a sufficient passage space between the front and rear rows even if the depth of the deck is large. It is in.

[0010]

In order to achieve the first object, the desk and chair of the first invention are separated from each other.
A flip-up seat that stands upright and a post at the back of this seat
It is pivotally mounted so that it can be turned up and down.
A backrest with a desk deck that can be tilted almost horizontally
Combined seats are arranged in multiple rows in the front-rear direction across the passage
A backrest with a desk deck in the front row is connected to the back row.
Rear row by falling down almost horizontally to block the road
Desk and chair, which is the desk of the person sitting on the desk
Lock the backrest with deck in the upright and horizontal positions
Lock mechanism and the petal surface under the upright seat
Before facing open and opening upright
Petal where the stepping operation is performed from one side and this petal operation
To unlock the lock mechanism, and
For desks that are positioned at the rear upright and horizontal positions
An unlocking mechanism to unlock the backrest with deck
It is characterized by having .

In such a chair that also serves as a desk, when the backrest with the desk deck is rotated, the locking device automatically turns the backrest with the desk deck into a slightly inclined state and a substantially horizontal falling state. Respectively, can be easily and reliably locked, and in any of the two locked states, the inconvenience that the backrest with the desk deck moves unnecessarily is eliminated,
Keep stable. In any of the locked states, the lock can be easily unlocked by operating one petal, and the backrest with the desk deck can be turned upside down. I
Front seat side to unlock the backrest with desk deck
Of the rear row seats
Cannot perform the lock release operation, and the pedal on the rear row side
Uses a desk, also placed under the seat
The place where the upper part is blocked by the seat
You will not know where you are,
This prevents the backrest of the seat from being operated unnecessarily. to this
More useless switching of the backrest by the person using the desk
Can be prevented.

In order to achieve the second object, the desk and chair of the second invention has a substantially horizontal shape so as to block the passage in the rear row.
A passage that blocks the backrest with the desk deck in the front row
Is slidably supported in the front and rear directions of opening and closing .

[0013] With such the desk also serves as chair, at the desk using state Killed in a substantially horizontal state of the backrest with a desk for the deck, if the position after adjustment before the rest the back with a desk for the deck, the back row seat seated person together so that we can make the work of writing, such as in a comfortable position, even if largely take the deck depth, before passage space between the back row is sufficiently secured, through the people is easier.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. Here, as an example of a chair that also serves as a desk, a connected chair for a conference hall arranged in a large number in a theater or a conference hall is exemplified. First, FIGS. 2 and 3
As shown in FIG. 1, a connecting pipe (penetration member) 2 made of a square steel pipe is fixed on a plurality of supporting legs 1 and a plurality of seats 3A, 3B, 3C are adjacent to the connecting pipe 2 in the left-right direction. Are arranged in a line. Each of these seats 3A, 3B, 3
C is a column 4 which is provided at equal intervals in the longitudinal direction of the connecting pipe 2 and is slightly erected in a rearward direction, and a core member 5a such as a steel plate projecting from the front surface of each column 4 (see FIG. 1). ), Armrests and side plates 5 attached thereto, seats 6 disposed between the side plates 5, and backrests 7 disposed between the columns 4, so that one person can be seated. It has been. The rows of the seats 3A to 3C sandwich the passage A.
It is installed in multiple rows in the front-back direction.

The seat 6 of each of the seats 3A, 3B, 3C.
Is slidable in a range from a substantially horizontal overturning state to an obliquely upright state by a well-known automatic rotary jumping mechanism (not shown) pivotally supported between the left and right side plates 5 and 5, and Is supported so as to be automatically erected by the spring force when the user leaves the seat.

The backrest 7 of each of the seats 3A, 3B, 3C.
Has a structure in which a molded cushion body 8 and a desk deck 9 are integrated by being superposed on both sides as shown in FIGS.
The backrest 7 is attached to the left and right columns 4 and 4 so as to be capable of turning up and down by a support structure described later. That is, the backrest 7 can be used as the original backrest of the chair.
It can be turned up and down so that it can be switched to a horizontal position with an appropriate height above the left and right columns 4, 4 so that the occupant in the back row can use it as a desk. Installed.

The backrest 7 has a molded cushion body 8.
Is about the size of the upper half of the original backrest,
When this is turned upright, it is connected to the upper side of the lower backrest-formed cushion body 10 fixed between the left and right columns 4, 4, and the upper and lower formed cushion bodies 8, 10 support the back of the seated person. I am going to receive it. The desk deck 9 is a large flat plate that covers the entire back surface of the molded cushion body 8 like a back plate of a chair and extends further downward to cover the back surface of the lower backrest molded cushion body 10. It is set to a depth sufficient to be used as a deck. In addition, another lower back decorative plate 11 is attached and fixed to the left and right columns 4, 4 on the lower side that cannot be covered by the deck 9.

Here, the support structure for mounting the backrests 7 on the left and right columns 4 will be described with reference to FIGS. 1 and 4 to 8. A pair of left and right angled hinge brackets 13, 13 are attached to the right and left back surfaces of the deck 9 via front and rear slide mechanisms 12, 12, which are directed outward from upper left ends of the left and right hinge brackets 13, 13. Pivots 14, 14 are protruded, and these left and right pivots 14, 14 are provided.
Bearing portions 4 which are formed at the upper ends of the left and right columns 4 and 4
The backrest 7 with the deck 9 is attached so as to be able to be turned upside down by being fitted to a, 4a.

Further, when the backrest 7 with the deck 9 is rotated in the upright direction, the backrest 7 is automatically locked and held in a slightly backwardly inclined upright state, and conversely, the backrest 7 is turned in the falling direction. A lock device is provided which automatically locks and holds the backrest 7 in a substantially horizontal overturned state when moved, and releases the lock by operating one petal in any of the locked states.

The lock device includes an upright lock mechanism 21 for locking and holding the backrest 7 in an upright state, and a falling lock mechanism 22 for locking and holding the backrest 7 in a substantially horizontal overturned state.
And a petal lock release mechanism 23 for releasing the locks of the lock mechanisms 21 and 22. Each of the mechanisms 21, 22, and 23 has a series of configurations.

That is, the upright lock mechanism 21 is provided with a rectangular tubular guide 26 provided on the front surface of the upper end of an L-shaped support plate 25 fixed on the connecting pipe 2, and is slidably movable up and down on the tubular guide 26. A lifting rod 27 fitted thereto, and the lifting rod 27
And a hook 28 having a substantially arrowhead-like shape attached rearward to the upper end of the upper surface, and a U-shaped locking rod 29 provided at a lower end portion of the back surface of the deck 9.

The hook 28 is always urged up to a predetermined height by a return spring 30 to be described later together with the lifting rod 27, and a U-shaped locking rod 29 near the lower end of the back surface of the deck 9 of the backrest 7 is provided. Gets over the front side and locks.

The overturning lock mechanism 22 is attached to a lateral beam 31 extending slightly upward from the middle between the left and right columns 4 and 4 via a substantially lip Z-shaped reinforcing member 32.
A pair of left and right vertically elongated guide plates 3 vertically installed in parallel with
3, 33, and a vertically long guide groove 3 formed from the lower end to the upper end of the left and right guide plates 33, 33.
One slide shaft 35 slidably fitted on the slide shafts 4 and 34, the lower ends of the slide shafts 35 being fitted to both ends of the slide shaft 35, and the upper ends being the lower ends of the left and right brackets 13 and 13 on the back surface of the deck 9. A pair of right and left link arms 37, 37 pivotally connected to each other via a shaft 36, and a guide member 39 rotatably pivotally mounted via a shaft 38 near the upper end between the left and right guide plates 33, 33. ,
A lock member 41 pivotally mounted via a shaft 40 above the lock member 41 is provided.

The left and right guide plates 33, 3
The third guide grooves 34, 34 have inclined grooves 34a, 34a which are bent forward and downward at the upper ends. The guide member 39 is formed by integrally connecting a pair of left and right rectangular plates to each other with a connecting plate. The front lower corner of the lower end is pivotally attached to a shaft 38 and tilts forward so as to block the guide grooves 34, 34. It has become. Further, the lock member 41 is formed by integrally combining a pair of left and right plate members bent in a slightly U-shape with a U-shaped member at the front half thereof, and an intermediate portion is rotatably fitted to the shaft 40, It rotates in the forward downward direction due to its own weight balance, and blocks the inclined grooves 34a, 34a. The rotation of the lock member 41 is restricted within a predetermined range by a stopper shaft 42 extending between the left and right guide plates 33, 33.

The petal lock release mechanism 23 is rotatably mounted between a pair of left and right bearing plates 43, 43 standing on a bottom plate of an L-shaped support plate 25 fixed on the connecting pipe 2. Petal 44 in the shape of a substantially U-shape, and this petal 4
4 and a series of pull-down links 46 and 47 for interlocking a receiving member 45 provided at the lower end of the elevating rod 27 of the upright lock mechanism section 21, and the lower end of the receiving member 45 via the first free shaft 48. An inverted U-shaped interlocking member 49 pivotally connected and an adjuster 50 connected to the upper end thereof
A pair of left and right vertically interlocking bars 52, 52 having lower ends pivotally connected to the upper end of the adjuster 50 via a second free shaft 51, the upper ends of these interlocking bars 52, 52 and the overturning lock mechanism And a third free shaft 53 pivotally connected to the rear end of the lock member 41 of the first and second lock members 41. The left and right sides described above are provided between the second free shaft 51 and the stopper shaft 42 above the second free shaft 51. A pair of return springs 30 are provided. The return spring 30 is a tension coil spring, and is configured to constantly pull and urge the various members 44 to 50 below the second free shaft 51. Further, the second free shaft 51
Is also penetrated through the lower rear corner of the guide member 39, and is always urged by the return spring 30 so that the guide member 39 tilts forward. The left and right interlocking bars 52, 52 have oblique slots 52a at their lower ends, and are slidably fitted on the second free shaft 51 so as to be movable up and down within a predetermined range.

Here, the petal 44 has a petal surface facing forward.
The rear end of the seat 6, which is flipped up (standing) so as to face
It is located on the lower side. And put this petal 44 in the front row
By stepping on from the seat side , a series of interlocking links 46,
The hook 28 is pulled down together with the lifting rod 27 via the first free shaft 47 and the first free shaft 48, and at the same time, the second free shaft 5 is connected via the interlocking member 49 and the adjuster 50.
1, the guide member 39 is rotated rearward, and the left and right interlock bars 52, 52 are lowered to rotate the lock member 41 in the upward direction. Toes
The lock can be released.

The front and rear slide mechanisms 12, 12 provided on the left and right portions of the back surface of the deck 9 of the backrest 7 are used as draw-out slide rails of an ordinary office desk. As shown in FIG. 8, a long lip groove-shaped outer rail 55 fixed to the back surface of the deck 9 by screws or the like, and an inner slideably slidably fitted thereto via a retainer and a steel ball (not shown). The inner rail 56 and the bracket 13 are connected by screws. Thus, the entire backrest 7 with the deck 9 is supported by the left and right brackets 13 so as to be slidable back and forth. In this support structure
Thus, the backrest 7 that is folded down so as to block the passage A is blocked.
Can slide along the direction of opening and closing passage A (front and rear)
It is like that. In addition, a ball catch is provided as an end stopper of the front and rear slide mechanisms 12 and 12. This is a pair of a concave female member 57 with a built-in ball and a convex male member 58 removably fitted to the female member 57. Each male member 58 is attached to the bracket 13
It is attached to the front and rear of the arm 59 protruding from the front. In addition,
In addition to the ball catch type, the end stopper may be a roller catch type used for furniture doors or the like, or a magnet catch type.

According to the desk / chair having the above-described structure, when the backrest 7 with the desk deck 9 is rotated from the horizontal state shown by the imaginary line in FIG. 5 to the upright state shown by the solid line in FIG.
(A) As shown in FIG.
The U-shaped locking rod 29 of FIG.
Is locked and held in an upright state slightly inclined backward in parallel with the left and right columns 4 and 4. As a result, the backrest 7 can be reliably stood up and held without any play, and can be used as an original chair on which a person can sit.

When the backrest 7 is turned over from this state to be usable as a desk, first, the petal 44 of the petal lock release mechanism 23 of the lock device is moved to the position shown in FIGS.
As shown in (b), the user steps on the foot once from the front side. This allows a series of interlocking links 46, 47 and the first free shaft 4
8, the hook 28 descends together with the lifting rod 27,
The U-shaped locking rod 29 is released, and the lock is released. In this state, the backrest 7 is rotated in the falling direction. On this occasion,
When the foot is released from the petal 44, the fall lock mechanism 22 and the petal lock release mechanism 23 are brought into the state shown in FIG.

When the backrest 7 is turned in the overturning direction in this manner, a pair of left and right link arms 37, 37 are pulled obliquely rearward by the left and right brackets 13 which turn together with the deck 9, and the slide shaft 35 at the lower end thereof is moved. The slide shaft 35 rises along the left and right guide grooves 34, 34, and pushes the guide member 39 backward once, gets over the upper side thereof, and hits the upper ends of the guide grooves 34, 34. Here, when the hand is released from the backrest 7, the slide shaft 35 descends by its weight. At this time, the slide shaft 35 is guided by the upper side of the guide member 39 and the lock member 4 is moved.
The lock member 41 is guided downward into the inclined groove portions 34a, 34a while pushing up the lock member 41, and then the lock member 41 rotates downward by its own weight.
Is held so as to be pressed into the inclined groove portions 34a, 34a. The slide shaft 35 is now in a stationary state,
The left and right link arms 37, 37 function like cheek sticks,
The deck 9 is securely locked and held in a substantially horizontal overturning state without freely moving on the left and right columns 4 and 4. Thus, the rear seats can be used as desks.

That is, the seat 6 in the back row seat is defeated and the seat 6 is seated.
For example, the backrest 7 of the front row seat was formed in front of the seated person.
A desk is placed. At this time, the petals 44 in the front row seats
6 is located underneath and unlocked from the back row
And the pedal 44 in the back row seats
The upper part is blocked by the seat 6 on which
You. Therefore, the user sits on the seat 6 in the rear row and the backrest 7 in the front row.
When using the desk as a desk, the person using the desk
The backrests of the seats 3A to 3C are operated unnecessarily.
Useless backrest by the person using the desk
7 can be prevented from switching. Moreover, when the use state as the desk, the deck 9 of a fall in a substantially horizontal state, slide mechanism 1
Slide 2 and 12 to adjust the front and rear position
From being freely supported, by pulling forward (backward) the deck 9 as shown in FIG. 8 of (a), Ru as Na seated person rear seat can perform the work of writing such as in a comfortable posture. Pressing Conversely deck 9 as shown in FIG. 8 (b) forward, block the passage A
Which was deck 9 is retracted, passage A is seated person is comfortably Away
It is possible to secure a sufficient passage space that can pass through . For this reason, even if the deck 9 has a sufficiently large depth as a desk to facilitate writing work or the like, there is no problem in securing a passage space between the front and rear rows. In addition, the deck 9 is stopped by the engagement of the male and female members 57 and 58 of the ball catch which is the end stopper at the front and rear sliding position.

Next, the backrest 7 with the deck 9 in the overturned state.
To return to the usable state as a chair, first, the petal 44 of the petal lock release mechanism 23 is depressed with the foot from the front side as in the previous case. 7B, the second free shaft 51 is pulled down via the series of interlocking links 46 and 47, the first free shaft 48, the interlocking member 49, and the adjuster 50, whereby the guide member 39 is moved. The guide grooves 34, 34 are opened by pivoting rearward, and the left and right interlocking bars 52, 52 are pulled down, so that the lock member 41 pivots in the upward direction to open the inclined grooves 34a, 34a. In this state, the backrest 7 is slightly unlocked in the unlocked state.
4a, 34a once rises and descends in the guide grooves 34, 34. When the slide shaft 35 comes below the guide member 39, the foot is released from the petal 44, and the backrest 7 is further turned upright as it is. Locking rod 29
Is pushed down on the hook 28 once, gets over the front side and is locked, so that the backrest 7 is automatically locked and held in an upright state in which the backrest 7 is slightly inclined backward in parallel with the left and right columns 4 and 4.

[0033]

According to the first aspect of the present invention, since the desk and chair are configured as described above, the backrest with the desk deck can be easily and reliably turned into a tilted state in which the backrest with the desk deck is slightly tilted rearward by a rotating operation and a substantially horizontal falling state. There is no inconvenience that the backrest with the desk deck moves in any of the two locked states, and it is extremely safe, and one pedal can be used in any of the locked states. By this operation, the lock can be easily released, and the backrest with the desk deck can be turned upside down. In addition, the backrest lock with desk deck
The petals on the front row to be released are placed under the seat
As a result, the unlock operation cannot be performed from the back row seat side,
The rear row pedals are located below the seats, allowing
With the movement of the person using the
I'm using a desk because I'm blocked and can't find where
When the backrest of the seat is inadvertently operated by
Unnecessary backrest that can be evacuated and used by desk users
Switching can be prevented. In addition , the desk and chair of the second aspect opens and closes a passage obstructed by the backrest with the desk deck.
2. The effect of claim 1 because the support is slidable in any direction.
In addition to the above, the back-seat seated
What is possible, to secure sufficient passage space between the front and rear rows
It has the effect that it can be done.

Further, when the backrest with the desk deck is used in a state where the backrest with the desk deck is tilted in a substantially horizontal state, the front and back positions of the backrest with the desk deck can be adjusted, so that the occupant in the rear row seat can write in a comfortable posture. Can be performed, and even if the depth of the deck is made large, the effect of sufficiently securing the passage space between the front and rear rows can be obtained.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part showing an embodiment of a desk and chair of the present invention.

FIG. 2 is a view showing the entire chair of the embodiment, with the left half viewed from the back and the right half viewed from the front;

FIG. 3 is a side view of front and rear rows of chairs of the embodiment.

FIG. 4 is an enlarged front view of one seat portion of the chair of the embodiment.

FIG. 5 is an enlarged side view of the embodiment.

FIG. 6 is a front view showing the configuration of the lock device of the embodiment.

FIGS. 7A and 7B are cross-sectional views taken along the line AA of FIG. 6 showing a locked state and an unlocked state of the lock device.

FIGS. 8A and 8B are cross-sectional views showing a front-back sliding mechanism of the deck.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 4 ... prop, 6 ... seat, 7 ... backrest, 8 ... molded cushion body, 9 ... desk deck, 12 ... front-back slide mechanism, 13 ... hinge bracket, 21, 22, 23 ... locking device (21)
... Standing lock mechanism, 22 ... Tumble lock mechanism, 23 ...
Petal lock release mechanism), 44 ... Petal.

Claims (2)

(57) [Scope of request for utility model registration] (1)A flip-up seat that stands up as you leave
And on the post at the back of this seatPivotally pivotableIsSomewhat later
Rotate from tilted state to fall to almost horizontal stateIs possible
A seat combined with a backrest with a desk deck
And arranged in multiple rows in the front-rear direction.
Fall down so that the backrest obstructs the passage to the back row.
To form a desk for the person sitting in the back rowdesk
In the dual-purpose chair,The backrest with the desk deck is tilted to the rear upright position, the horizontal
Lock mechanism to lock in position The saidThe petal surface faces forward under the upright seat
Stepped from the front, which is open when the seat is standing
The petals on which the operation takes place, The petal operation unlocks the lock mechanism,
The rearwardly standing upright position at the rear of the upright seat, the water
Lock the backrest with the desk deck positioned in a flat position.
Lock release mechanism to release the lock Equipped with Features
And desk and chair. 2. The apparatus is tilted in a substantially horizontal state so as to block the rear row of passages.
Back row with desk deck in the front row
It is characterized by being slidably supported in the opening and closing directions.
2. The desk / chair according to claim 1, wherein