JPH0246759Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to a rotating mechanism for a chair seat.

(B) Prior Art Although not shown in the drawings, a conventional chair seat rotation mechanism is such that, for example, a shaft passing through the seat is fixed to the legs on both sides, and the seat is rotated using this shaft as a support. When standing up from a seated position, a spring was placed between the shaft and the seat, and the elastic force of this spring caused the seat to rise automatically. In addition, in order to keep the seat in an almost vertical position when standing up, the rocking plate on the seat side, which rotates within the horizontal and vertical positions mentioned above, is brought into contact with a stopper provided on one side of the leg. The seat is maintained in a substantially horizontal state, and the swing plate is brought into direct contact with a fixed elastic body provided on the other side of the leg, thereby maintaining the seat in a substantially vertical state when the seat is raised. Ta.

(c) Problems to be solved by the invention Due to the above structure, the conventional chair seat rotation mechanism has the following problems.

(1) When the seat automatically stands up due to the elastic force of the spring, it will stand up to a completely vertical position very close to the back. Therefore, when sitting, the seat must be rotated from a fully erect position to a nearly horizontal position, which requires a large effort to sit.

(d) Means for solving the problems This invention solves the problems of the prior art described above. By attaching an elastic body similar to the elastic body, the automatic standing position of the seat stops before the fully standing position by the volume of the elastic body, thereby minimizing the behavioral burden of sitting down. The purpose of this invention is to provide a rotation mechanism for The feature of this invention is that the end of the shaft that passes through the seat is fitted into the shaft stoppers of both legs, and the chair seat is rotated by using this shaft as a support to raise the seat from the seated state. In this method, a spring is disposed between the shaft and the seat to enable automatic raising of the seat, and the shaft is fixed by being held down by one end of a fixed plate, and a fixed elastic body is attached to the other end of the fixed plate. At the same time, a seating stopper receiver is fixed on the inside of the leg near the shaft stopper, and the above-mentioned fixed elastic body is attached to the rocking plate of the seat that moves between the seating stopper receiver and the fixed elastic body. This is because rocking elastic bodies are attached in opposing positions to abut against each other depending on whether they are light or strong.

(E) Effect When sitting on a chair with the above configuration, when the seat in the upright position is rotated downward in the horizontal direction against the spring, the rocking plates attached to both sides of the seat move toward the leg side. Since the seat contacts the seat stopper receiver, the seat can be seated smoothly and easily in a stable condition. In this case, since the seat at the time of standing up before sitting down is in a position just before fully standing up, the burden of action of tilting the seat horizontally in order to sit down can be minimized. In addition, when the seat is to be stood up after finishing its use, when the seated person stands up, the seat will change from its horizontal state to the position of the seat side rocking plate due to the elastic force of the spring. It can automatically stand up to a position where the elastic body attached to the end abuts the fixed elastic body on the leg side. During this automatic standing up, the seat stops at a position just before it fully stands up due to the elastic force possessed by the elastic bodies described above, but the seat stops at this position only when a person passes through the path in front of the seat. Since it is in a stopped state without any hindrance, it is possible to pass easily without touching the seat. At that time, when people pass each other in the front passage of the seat, the person sitting on the seat side presses the seat further to the back, and this forced pressure causes the elastic body to move in the automatic standing position of the seat until then. When the elastic forces of the elastic bodies were in a balanced state, by this forced pressure, both elastic forces are crushed and both elastic bodies are brought into a contracted state. Therefore, the seats stand up almost vertically, allowing people to pass each other easily.

(f) Examples Examples of this invention will be described below based on the attached drawings.

1 to 4 show one embodiment of this invention. In other words, on both sides of the position where each single chair that becomes a connecting chair in a venue etc. is installed, there are two
Legs 1 facing the body are erected at predetermined spacing positions with bolts (not shown), and in the recesses 1b of the shaft stoppers 1a protruding from each inner surface of the legs 1,
A shaft 3 having a rectangular cross section that penetrates the hole 2a of the seat 2 made of a blow-molded product and protrudes outward on both sides fits into the end of each side, and uses this shaft 3 as a support to carry out the above-mentioned process. In the rotating mechanism of the seat of the chair, the seat 2 is raised up from the seated state, and a spring stopper 3a is fitted onto the midway axis of the shaft 3. One end of the spring 10 fitted on the shaft is locked. The other end of this spring 10 is locked to a locking portion 11b protruding from an arm 11 mounted on the seat 2. The seat 2 is configured to be able to automatically stand up about the shaft 3 by its elastic force unless it receives a pressing force against the upper surface of the seat 2.

According to the above, the shaft stopper 1 on each side of the leg 1
Each end of the shaft 3 fitted in the recess 1b of a is connected to a fixing plate 4 formed by bending a band-shaped plate into a chair-shaped two-stage shape.
It is fixed with a presser foot at one end. In this case, the fixed plate 4 is fixed at one end to the shaft stopper 1a of the leg 1 in a diagonally descending manner by screwing and tightening a bolt 13. A fixing elastic body 5 made of soft rubber or the like and shaped into a substantially rectangular shape is integrally attached to the other end of the fixing plate 4.

Next, on the inside of the leg 1 on each side near the above-mentioned shaft stopper 1a, there is a seating stopper receiver 6 with a volume that allows easy contact with a stopper 8 attached to the rocking plate 7 of the seat 2, which will be described later. It is fixed horizontally. In addition, an arm 11 with holes 11a attached to both sides of the seat 2 is attached to the arm 11 with holes 11a attached to both sides of the seat 2 so as to move in an arc shape between the seat stopper receiver 6 and the fixed elastic body 5 according to this embodiment, centering on the shaft 3 of the seat 2. A rocking plate 7, which is a band-shaped plate bent into a substantially wide inverted U-shape, is attached. Each rocking plate 7 has the above-mentioned seating stopper receiver 6 on the upper surface of one end thereof.
A stopper 8 made of hard rubber or the like is attached in a resting manner to maintain the seat 2 stably when the seat 2 is seated. Further, on the lower surface of the other end of the swinging plate 7, a swinging elastic body 9 formed of a homogeneous material and having approximately the same volume as the fixed elastic body 5 that comes into contact with the fixed elastic body 5 on the circumferential line during movement is integrally attached. has been done.

Even if the swinging elastic body 9 as described above comes into contact with the fixed elastic body 5 as shown in FIG. , 9 are brought into contact with each other in a light manner that allows them to maintain almost their original shapes. Therefore, the seat 2 is configured to stop at a position just before the fully erected state by the volume of the rocking elastic body 9. In addition, when both the elastic bodies 5 and 9 are in slight contact with each other as described above and the seat 2 is stopped at a position just before the fully erected state, a further pressing force is intentionally applied to the seat 2 in the direction of the fully erected state. In this case, since this manual pressing force is naturally greater than the elastic force possessed by both the elastic bodies 5 and 9, a forcibly strong contact force acts on both the elastic bodies 5 and 9. Become. Therefore, the seat 2 is configured so that it can be further raised up to the fully raised position when both the elastic bodies 5 and 9 are compressed. Note that 12 in FIG. 1 is the back placed between both legs 1.

When sitting on the chair configured as described above, when the seat 2 in the upright state is rotated downwardly in the horizontal direction against the supporting force of the spring 10, the rocking plates mounted on both sides of the seat 2 7 comes into contact with the seat stopper receiver 6 of the leg 1 on that side via the stopper 8, so that the seated state can be maintained smoothly and easily in a stable state due to the inherent elastic support of the stopper 8. In this case, since the seat 2 is in a position just before fully standing up before sitting down, the burden of action to tilt this seat 2 horizontally in order to obtain the above-mentioned seating condition is lower than that in the fully standing position. Instead, it is sufficient to rotate the user downward from a position just before fully standing up, where the elastic forces of the fixed elastic body and the swinging elastic body 9 are balanced, so that the burden of sitting can be minimized.

In addition, the use of seat 2 as described above has ended, and this seat 2
When the seated person stands up, the seat 2 changes from its horizontal state when seated, due to the resilient force of the built-in spring 10, to the seat 2 attached to the other end of the swing plate 7 on the seat 2 side. The swinging elastic body 9 is the leg 1
It can automatically stand up to a position where it comes into contact with the fixed elastic body 5 on the side. When the seat 2 is automatically raised, the elastic forces of the elastic bodies 5 and 9 are almost balanced when they come into contact with each other, so the seat 2 is in a position just before it is fully raised (vertically raised). However, when the seat 2 stops at this position, the seat 2 stops at a level that does not pose a problem for people to pass through the front passage of the seat 2.
You can pass smoothly and easily without touching the road. (Refer to Figure 3) When the seat 2 is in the automatic upright position, when people pass each other in the path in front of the seat 2, if the person on the seat 2 side presses the seat 2 further towards the back 12. ,
Due to the forced pressure applied by this person's hand, the seat 2, which had been in the automatic standing position shown in FIG. Due to the pressurization, both elastic forces are crushed, and both elastic bodies 5 and 9 are reduced to just below the allowable limit. (See Figure 4) Therefore, the above seat 2
The seat 2 will be additionally stood up to the fully upright position, which is almost vertical, so that people can easily pass each other in front of this seat 2.

In the above embodiment, both the fixed elastic body 5 and the oscillating elastic body 9 are made of, for example, soft rubber. However, this invention is not limited to the above embodiment, and can be Similar effects can be obtained even if both the elastic bodies 5 and 9 are formed of springs or the like.

(g) Effect of the invention This invention is a rotation of the seat of a chair in which the ends of the shaft passing through the seat are fitted into the shaft stoppers of the legs on both sides, and this shaft is used as a support to raise the above-mentioned seat from a seated state. In the mechanism, a spring is disposed between the shaft and the seat to enable the seat to rise automatically.The shaft is held by one end of a fixed plate, and a fixed elastic body is attached to the other end of the fixed plate. At the same time, a seating stopper receiver is fixedly installed on the inside of the leg near the shaft stopper, and the above-mentioned fixed elastic member is attached to the rocking plate of the seat that moves between the seating stopper receiver and the fixed elastic member. It is characterized by the fact that rocking elastic bodies are attached to the body in opposition to each other and are brought into contact with the body depending on whether it is light or strong. Therefore, the rocking plate on the seat side that comes into contact with the fixed elastic body of the leg is also provided with a rocking elastic body similar to the fixed elastic body on the leg side, and the automatic raising position of the seat is determined by the volume of the rocking elastic body. This allows the chair to stop just before the fully standing position, thereby minimizing the burden of movement required to sit down, which has the effect of increasing the functionality of the side passage in this type of connected chair. .

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing the rotation mechanism of the chair seat according to an embodiment of the invention, Fig. 2 is a diagram of the operation of the rotation mechanism when sitting, and Fig. 3 is a diagram of the operation of the same when the chair is automatically raised. FIG. 4 is a diagram showing the operation when the robot is completely standing up. 1... Leg, 1a... Shaft stopper, 2... Seat, 3...
...Axis, 4...Fixed plate, 5...Fixed elastic body, 6...
Seating stopper receiver, 7... Swinging plate, 9... Swinging elastic body, 10... Spring.

Claims (1)

[Scope of utility model registration request] In a rotating mechanism for a chair seat, in which the ends of a shaft passing through the seat are fitted into the shaft stoppers of the legs on both sides, and the shaft is used as a support to raise the seat from a seated state, there is a space between the shaft and the seat. A spring is disposed on the shaft to enable automatic raising of the seat.The shaft is fixed by being held down by one end of a fixing plate, and a fixing elastic body is attached to the other end of the fixing plate, and a fixing elastic body is attached to the other end of the fixing plate. A seating stopper receiver is fixed on the inside of the adjacent leg, and a rocking plate of the seat that moves between the seating stopper receiver and the fixed elastic body makes contact with the fixed elastic body according to whether it is light or strong. A rotating mechanism for a chair seat, characterized in that rocking elastic bodies are attached in opposing positions to rotate the seat.