JP3005176B2 - Splash mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a pair of legs, a seat disposed between the pair of legs, and a support for rotatably supporting the seat between the pair of legs. The present invention relates to a flip-up mechanism that is provided on a chair having a shaft and that lifts the seat portion from a seated position in a standing direction.

[0002]

2. Description of the Related Art Heretofore, as a lifting mechanism of this type, an urging means for urging a seat portion in an upright direction, and when the seat portion is raised to a predetermined rest position by the urging means, the seat portion is stopped. There is known an apparatus provided with a stationary means for stopping the operation. For example, the torsion coil spring (corresponding to an urging means) externally fitted to the support shaft of the seating section urges the seating section in the upright direction, and is integrated with the seating section when the seating section is flipped up to a predetermined stationary position. The engaging portion and the engaging portion integrated with the leg body (both correspond to stationary means) are engaged with each other,
One that stops the seat at that position has been considered.

[0003]

However, in this type of flip-up mechanism, the stationary position sometimes varies due to an assembling error of the engaging portion. When a large number of chairs are used side by side as in a stadium or the like, if the stationary positions vary, the seated portions that have been flipped up may be uneven and the landscape may be impaired.

In this type of flip-up mechanism, the rest position is uniquely defined by the positional relationship between the engaging portions. On the other hand, the rest position of the seating portion is individually set depending on the type of chair. For this reason, one type of flip-up mechanism cannot be applied to various chairs. Therefore, a flip-up mechanism must be designed for each type of chair, and the manufacturing cost of the chair cannot be sufficiently reduced.

In view of the above, according to the present invention, the resting position of the seating portion can be adjusted so that the resting position of the seating portion can be made uniform or the resting position can be changed according to the type of chair. It was made to provide a splash mechanism.

[0006]

According to a first aspect of the present invention, there is provided a vehicle comprising: a pair of legs; a seating portion disposed between the pair of legs; A support shaft rotatably supported between the pair of legs, provided on a chair having a lifting mechanism for lifting the seating portion from a seating position in a rising direction, wherein the seating portion is raised in a rising direction. A biasing means for biasing, a stationary means for stopping the seating portion when the seating portion is lifted up to a predetermined stationary position by the biasing means, and a stationary position of the seating portion by the stationary means ; And a rest position changing means for changing the position without changing the device.

According to a second aspect of the present invention, there is provided a spring mechanism according to the first aspect, wherein the urging means and the stationary means are disposed inside the seat portion. According to a third aspect of the present invention, the rocking piece is configured to be fixed to the seating portion, and rocks around the support shaft in the upright direction by the biasing force of the biasing means; A locking member for locking the rocking piece when the piece has rocked to a predetermined position, wherein the stationary position changing means changes the fixed position of the rocking piece to the seat around the support shaft. The gist of the flip-up mechanism according to claim 1 or 2 is as follows.

[0008]

According to the first aspect of the present invention, the urging means urges the seating portion in the upright direction, and the stationary means moves the seating portion to a predetermined stationary state by the urging means. Let the seat rest when lifted up to the position. The rest position changing means changes the rest position of the seating portion by the rest means without exchanging parts . That is,
According to the present invention, the stationary position of the seating portion can be adjusted by the stationary position changing means without exchanging parts .
Therefore, it is possible to uniformly arrange the resting positions of the seating portions with respect to a plurality of chairs of the same type, or to change the resting positions according to the type of chair.

Therefore, according to the present invention, the stationary positions of a large number of horizontally arranged chairs are uniformly aligned to maintain a good view, and a single type of flip-up mechanism can be applied to various chairs, thereby reducing the manufacturing cost of the chair. Can be satisfactorily reduced. According to a second aspect of the present invention, in addition to the configuration of the first aspect, the urging means and the stationary means are disposed inside the seat portion. Therefore, it is possible to satisfactorily prevent the clothes and the like of the user from becoming entangled with the members constituting the urging means or the stationary means. Therefore, according to the present invention, in addition to the effect of the first aspect of the invention, there is an effect that the safety of the chair can be further improved.

[0010] The third aspect of the present invention is the first or second aspect.
In addition to the configuration of the invention described above, a stationary member is configured to be fixable to the seating portion, and a rocking piece that rocks in a rising direction around the support shaft by the biasing force of the biasing means, and the rocking piece reaches a predetermined position. A locking member that locks the rocking piece when rocked, wherein the stationary position changing means changes the fixed position of the rocking piece to the seat around the support shaft.

That is, the swinging piece swings in the upright direction by the biasing force of the biasing means, whereby the seating portion fixed to the swinging piece also swings in the upright direction. Further, when the rocking piece is locked by the locking member and stopped at the predetermined position, the seat fixed thereto is also stopped. The rest position of the seat at this time is defined by the predetermined position and the positional relationship between the swinging piece and the seat. Since the stationary position changing means changes the fixed position of the swinging piece to the seating portion around the support axis, the stationary position of the seating portion can be changed.

In the present invention, the rocking piece is always locked at the above-mentioned predetermined position when stationary, so that the urging force acting on the urging means at that time is constant. That is, even if the rest position of the seating portion is changed, the urging force of the urging means at the time of the rest is constant. For this reason, in the present invention, in addition to the effects of the invention described in claim 1 or 2, the stationary position is further stabilized, and the durability of the flip-up mechanism is further improved by preventing the application of an excessive biasing force at the time of stationary. The effect of improving is produced.

[0013]

Next, an embodiment of the present invention will be described with reference to the drawings. It should be noted that the present invention is not limited to the following embodiments at all, and can be implemented in various modes without departing from the gist of the present invention.

FIG. 2 is a front view showing the structure of the chair 3 to which the flip-up mechanism 21 (FIG. 1) of the embodiment is applied.
Is a side view of the chair 3. As shown in FIGS.
The chair 3 according to the present embodiment includes a plurality of legs 5 erected side by side on the floor F, and a backrest 7 and a seating portion 9 disposed between the legs 5 adjacent to each other. ing. The backrest 7 is fixed between the adjacent legs 5, and the seat 9 is rotatably supported via a support shaft 11 (FIG. 1). The seating portion 9 includes a seat plate 13 having a cushion or the like formed on a surface thereof, and metal arms 15 fixed to both sides of the seat plate 13.
5 is provided with a flip-up mechanism 21 shown in FIG.

FIG. 1 is an exploded perspective view showing the structure of the flip-up mechanism 21. As shown in FIG.
3 and a stopper 25 are fixed to the leg 5 (FIG. 2) so as not to rotate, and a column 11 a of the support shaft 11 protrudes from the leg 5. Further, a prism 11b having a substantially square cross section is formed at the tip of the cylinder 11a. The arm 15 has a cylindrical portion 15a formed coaxially with the support shaft 11 on a side (hereinafter referred to as an inside) fixed to the seat plate 13 (FIG. 2).
The support shaft 11 is attached to the cylindrical portion 15a via a collar 27.
Is inserted. In addition, the cylindrical portion 15a
Oscillating piece 31 and torsion coil spring 33 as urging means
Are sequentially inserted.

Here, the swinging piece 31 is configured to be swingable about the cylindrical portion 15a, and has a pin 31a protruding inward. A screw hole 3 is provided at one end of the swinging piece 31.
1b, an arc-shaped hole 15b is formed in the arm 15, and a screw 35 is inserted into the screw hole 31b through the hole 15b.
Is screwed, the swinging piece 31 is fixed to the arm 15. By changing the position of the screw 35 in the hole 15b, the fixing position of the rocking piece 31 to the arm 15 can be changed around the cylindrical portion 15a.

The prism portion 11b of the support shaft 11 penetrating through the collar 27 and the cylindrical portion 15a is fitted into a square hole 37a of a stopper 37.
Is fixed to the support shaft 11. At one end of the stopper 37, a locking piece 37b as a locking member is directed outward.
Are protruding. Rubber caps 43 are respectively attached to both ends of the aforementioned torsion coil spring 33, and both ends of the torsion coil spring 33 are engaged with the pin 31a of the swinging piece 31 and the locking piece 37b of the stopper 37 as follows. . That is, both ends of the torsion coil spring 33 are engaged from both sides of the pin 31a and the locking piece 37b arranged in a line so as to be pressed against each other via the rubber cap 43, whereby the torsion coil spring 33 is engaged with the pin 31a and the locking member. The piece 37b is urged in the approaching direction.

Further, an engagement piece 15c is provided on the inner wall surface of the arm 15 to engage with the stopper 37 when seated. In the drawings, 45 and 47 are well-known washers. Next, the operation of the flip-up mechanism 21 configured as described above will be described. FIG. 4 is an explanatory view showing the state of the flip-up mechanism 21 when the seating section 9 is disposed at the stationary position (the position indicated by A in FIG. 3). The seating section 9 is arranged at this position when no force is applied from the outside. As shown in FIG. 4, the pin 31a of the rocking piece 31 and the locking piece 37b of the stopper 37 are arranged closest to each other due to the urging force of the torsion coil spring 33. At this time, screw 35
Are arranged on a linear extension line connecting the pin 31a and the locking piece 37b, and thereby, the rotation position of the arm 15 and thus the position of the seating portion 9 are defined.

Subsequently, when the seat 9 is pushed down, the arm 15 and the swinging piece 31 swing counterclockwise (hereinafter referred to as counterclockwise) in FIG. Then, the pin 31
a displaces one end of the torsion coil spring 33 counterclockwise.
Thereby, the urging force of the torsion coil spring 33 acts clockwise, that is, acts in the rising direction of the seating portion 9. When the seat portion 9 is pushed down against this urging force, the engagement piece 15c of the arm 15 is engaged with the stopper 37 as shown in FIG. Since the stopper 37 is non-rotatably fixed to the leg 5 via the support shaft 11, the seating portion 9 stops by this engagement. At this time, the seating portion 9 is disposed at the seating position indicated by B in FIG.

On the other hand, when the seating portion 9 at the rest position is pressed in the direction of the backrest 7, as shown in FIG.
The swinging piece 31 swings clockwise, and the pin 31a displaces the other end of the torsion coil spring 33 clockwise. by this,
The biasing force of the torsion coil spring 33 acts counterclockwise. At this time, the seat 9 is disposed at the push-back position indicated by C in FIG. In the chair 3 of the present embodiment, when a person passes by in front of the chair 3 or the like, the seating portion 9 can be disposed at this push-back position to secure a passage. When the pressing of the seat 9 is stopped, the seat 9 returns to the above-mentioned rest position by the urging force of the torsion coil spring 33.

Further, in the flip-up mechanism 21 of the present embodiment,
Since the positional relationship between the swinging piece 31 and the arm 15 can be adjusted as described above, the rest position of the seat 9 can be changed as follows. For example, in the example of FIG. 4, the screw 35 is provided at one end (the lower end in the figure) of the hole 15b, but when the screw 35 is provided at the other end of the hole 15b, as shown in FIG. At the same time, the rotational position (stationary position) of the arm 15 and thus the seat 9 changes. That is, screw 35,
The hole 15b corresponds to a stationary position changing unit. Also in this case, the swinging piece 31 is disposed at the same position as in the example of FIG.
The locking piece 37b, the pin 31a, and the support shaft 11 are arranged on a straight line. Therefore, the urging forces applied from the torsion coil spring 33 are balanced.

As described above, in the flip-up mechanism 21 of this embodiment, the rest position of the seat 9 can be adjusted depending on where the screw 35 is disposed in the hole 15b. Therefore, the stationary position of the seating portion 9 can be uniformly arranged with respect to a plurality of chairs 3 of the same type arranged side by side, and the landscape can be maintained. Further, most of the components of the flip-up mechanism 21 of this embodiment are disposed inside the arm 15, that is, inside the seat 9. Therefore, the flip-up mechanism 2
1, such as the swinging piece 31, the torsion coil spring 33, and the stopper 37, can be prevented from being entangled with the user's clothes. Therefore, the safety of the chair 3 can be further improved.

Further, in the present embodiment, the rocking piece 31 is always locked at a predetermined position where the biasing force applied from the torsion coil spring 33 is balanced at the time of the above-mentioned rest, and this means that
It does not change even if the rest position of is changed. For this reason, the rest position of the seat portion 9 can be further stabilized, and the durability of the flip-up mechanism 21 can be further improved by preventing an excessive urging force from being applied at the time of rest.

Further, in the flip-up mechanism 21 of this embodiment,
The rest position may be changed according to the type of chair. That is, in the above embodiment, the flip-up mechanism 21 is
It is applied to the chair 3 in which the seating portion 9 is stationary at an angle,
Like the chair 53 shown in FIG. 8, the present invention can be applied to a chair 53 in which the seating portion 59 is kept almost vertically stationary by making only a slight design change. Therefore, the flip-up mechanism 2
1 can be mass-produced, and the production cost of the chairs 3 and 53 can be favorably reduced. In FIG. 8,
(A) shows a state in which the seating portion 59 is disposed at the stationary position,
(B) has shown the state where the seating part 59 was arrange | positioned at the seating position, respectively.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view illustrating a configuration of a flip-up mechanism according to an embodiment.

FIG. 2 is a front view showing a configuration of a chair to which the flip-up mechanism is applied.

FIG. 3 is a side view showing the configuration of the chair.

FIG. 4 is an explanatory diagram illustrating a state of the flip-up mechanism in a stationary position.

FIG. 5 is an explanatory diagram showing a state of the flip-up mechanism at a sitting position.

FIG. 6 is an explanatory diagram showing a state of the flip-up mechanism at a push-back position.

FIG. 7 is an explanatory diagram showing a state of the flip-up mechanism when the stationary position is changed.

FIG. 8 is a side view showing the configuration of another chair to which the above-described flip-up mechanism is applied.

[Explanation of symbols]

3, 53 ... chair 5 ... legs 9, 59 ... seating portion 11 ... support shaft 15 ... arm 15b ... hole 21 ... flip-up mechanism 31 ... swinging piece 31a ... pin 33 ... torsion coil spring 35 ... screw
37b ... locking piece

Claims (3)

(57) [Claims] 1. A chair comprising: a pair of legs; a seat disposed between the pair of legs; and a support shaft rotatably supporting the seat between the pair of legs. A lifting mechanism for lifting the seating portion from the seating position in a rising direction, wherein the biasing means biases the seating portion in the rising direction; and A resting means for resting the seating portion when the seating portion is lifted up to a position ;
And a rest position changing means for changing the position without changing the position. 2. The apparatus according to claim 1, wherein said urging means and said stationary means are disposed inside said seat portion.
The flip-up mechanism described. 3. A swinging piece which is configured to be fixed to the seating portion and which swings in the upright direction around the support shaft by the biasing force of the biasing means, wherein the swinging piece is a predetermined piece. A locking member for locking the rocking piece when rocked to a position, wherein the stationary position changing means changes the fixed position of the rocking piece to the seating portion around the support shaft. The flip-up mechanism according to claim 1 or 2, wherein: