JPS63112Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a desk with a chair.

For example, there is a long desk in a lecture room, etc., in which seat bodies of chairs are provided at required intervals so as to be retractable on the desk side. Two examples are a structure in which a seat support arm is attached to a desk support arm and is moved in an arcuate trajectory in a horizontal plane around this support arm, as disclosed in Japanese Patent Application Laid-Open No. 54-150257, and a prior art document is omitted, but
There is a configuration in which the lower end of the seat support arm is attached to the support of the desk, and the seat support arm is moved in an arcuate trajectory in a vertical plane in the front and back direction. These include the inability to place items on the seat next to an empty seat, the relative positional relationship with the desk that changes when adjusting the seat back and forth during use, such as sideways movement and front-back tilt of the seat, and There are disadvantages such as restrictions and poor appearance at the time of closing. Furthermore, in the case of arcuate locus movement within the horizontal plane, a space is required to allow the arcuate movement to the left or right side.

In order to solve the above problems, a sliding mechanism using rails has been considered, but there is a problem that a sufficient sliding amount cannot be secured within the dimensions of the back of the seat surface.

The present invention is a device that stores the seat on the desk side by rotating the seat support arm in a horizontal plane, and uses two combined parallel crank link mechanisms to store the seat by approximately linear movement relative to the desk. and in use condition.

Embodiments of the present invention will be described below with reference to the drawings.
Although FIGS. 1 and 2 are actual structural diagrams of the present invention, it is easier to understand by referring to the basic principle diagram of FIG. 3.

In FIGS. 1 and 2, reference numeral 3 denotes a desk, which is fixed by a large support 2 erected on a base plate 1. Reference numeral 4 denotes a small support column erected on the base plate 1 for supporting the seat body of the chair. A bracket 5 is fixed to the upper end of this small support 4. One ends of a pair of parallel first links 6 and second links 7 are pivotally connected to this bracket 5 by pins 8 and 9. The other ends of the first link 6 and the second link 7 are pivotally connected by a third link 10 with pins 12 and 13, and the bracket 5, the first link 6, the second link 7, and the third
The link 10 constitutes a first parallel crank link mechanism.

Further, one ends of a pair of parallel fourth links 14 and fifth links 15 are pivotally connected to the pins 12 and 13, and the other ends are connected to the triangular chair seat support plate 16 by pins 17 and 18. Connected,
3rd link 10, 4th link 14, 5th link 1
5 and the seat support plate 16 constitute a second parallelogram link connected to the first parallel crank link mechanism.

Further, a slider 19 is slidably attached to the first link 6. The slider and the seat support plate 16 are connected by a pivot 20 at a position forming a triangle with the pins 17 and 18, and a seat body 23 has a seat portion and a backrest portion formed on the seat support plate 16. It has a fixed structure. The second link 7 has a curved stopper part 21 that comes into contact with the hinge part of the first link 6 attached to the bracket 5 when the seat body 23 is stored, and a curved stopper part 22 that comes into contact with the pin 12 when the seat body 23 is used. and is formed.

Since the present invention has the above-described structure, the first parallel crank link mechanism performs an arc locus motion using the pins 8 and 9 provided in the bracket 5 as fulcrums. Due to the arc locus movement of the first parallel crank link mechanism, the seat support plate 16 forming the second parallel crank link mechanism always maintains a parallel state to the bracket 5, and the sliding displacement of the slider 19 causes the bracket 5 to move. It performs a relief action on the circular locus motion and converts it into an approximate linear motion.

That is, the position of the seat body 23 indicated by the solid line in FIGS. 1 and 2 is in the used state, and the curved stopper portion 22 formed on the second link 7 contacts the pin 12 to regulate the position in the used state. There is. When the seat body 23 is pushed toward the desk 3 side in this state, the seat body 23 moves linearly forward toward the desk 3 side due to the above-mentioned action.
It is stored under the desk 3 as shown by the imaginary line.

In this way, according to the present invention, the member corresponding to the support arm of the seat body moves in a circular arc in the horizontal plane, but the seat body always moves linearly back and forth with respect to the desk. , there are no restrictions on the direction of entry and exit of the seated person, the turning space is smaller compared to conventional horizontal swivel chairs, and there is no sideways wobbling or front-to-back tilting when the seat is adjusted back and forth during use, making it easier to use with desks. It has the advantage of being able to obtain a relative positional relationship between the two, and allowing items to be placed in adjacent vacant seats.

[Brief explanation of the drawing]

FIG. 1 is a side view of the present invention, FIG. 2 is a plan view, and FIG. 3 is a diagram of the basic principle of the present invention. 1...Base plate, 2...Large pillar, 3...
desk, 4... small support, 5... bracket, 6... first link, 7... second link, 8, 9... pin,
10...Third link, 12, 13...Pin, 14
...4th link, 15...5th link, 16...
Seat support plate, 17, 18...pin, 19...
...Slider, 20...Axis, 21, 22...Second
Stopper part of link 7, 23... seat body.

Claims (1)

[Scope of utility model registration request] A desk 3 is fixed on the base plate 1 via a large support 2, and a small support 4 for supporting the seat of the chair is erected on the base plate 1, and a bracket 5 is fixed to the upper end of this small support 4. and the first pair of parallel
Connect one end of the link 6 and the second link 7 to the bracket 5.
The bracket 5, the first link 6, the second link 7 and the third link 10 are pivotally connected to each other by pins 8 and 9, and the other end is pivotally connected by a third link 10 and pins 12 and 13. A first parallel crank link mechanism is configured, and one end of a pair of parallel fourth links 14 and fifth links 15 is connected to the pin 1.
2 and 13, and the other end is pivotally connected to the triangular chair seat support plate 16 by pins 17 and 18, thereby forming a third link 10, a fourth link 14, and a fifth link 15. A second parallel crank link mechanism is configured by the seat support plate 16 and a slider 19 is slidably attached to the first link 6, and the slider 19 and the seat support plate 16 are connected to the pin 17, 18 by a pivot shaft 20 at a position forming a triangle, and a seat body 23 is fixed on a seat body support plate 16, so that the seat is housed linearly.