JPH0313236Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a chair device that can be folded horizontally and stored in a storage room provided below a stepped floor in a theater or stadium, for example. It is something.

[Conventional technology]

The lower ends of the chair legs are pivoted on the floor table so that they can be tilted forward, and when in use they are locked almost vertically.
For example, chairs that can be unlocked when not in use, have their seat and back plates overlapped to make them horizontal, and can be stored under a stepped floor stand are disclosed in Japanese Utility Model Publication No. 59-126 and Publication No. 59-1555. It is publicly known from publications and the like.

[Problems that this invention attempts to solve]

However, conventional chairs of this type are unstable as they tend to move back and forth when in use, and the legs of the chair are now unlocked by operating a lever located below the seat. While seated,
If the lever is activated for some reason, there is a risk that the chair will tip forward while you are still seated.When folding the chair, it is necessary to align the seat and back plates and then operate the lever while holding them. Yes, it was a hassle.

[Means for solving problems]

In this invention, a running rod that can protrude forward is provided on a pair of left and right rails in a storage section with a front opening below the floor table, and a recessed groove is cut from below at the rear of the lower edge, and a groove is cut from below at the rear of the lower edge. The key points are connected by a front stop lever, a support shaft, and a rear stop lever, and a support plate from which an inward engaging pin protrudes, and a back plate is installed on the top when vertical, and the center The front parts are connected by a pivot, and the lower part is formed with a thin walled part in which the opposing surface is recessed, and the vertically facing elongated hole drilled near the lower end fits into the support shaft of the support plate, allowing it to be positioned vertically. It is pivoted so that it can rotate freely and move slightly in the vertical direction from At the same time, a pair of left and right pedestals are locked vertically by abutting the rear edge of the support plate against the rear stop lever, a seat plate is constructed on the top surface, and the rear part is attached to both ends of the pivots of both pedestals. The press pin, which is pivoted and penetrates through the rear end, comes into contact with the upper end of the thin-walled part of the pedestal, so that when the pedestal is vertical, the pair of left and right supporting plates that hold the seat plate horizontally and the thin-walled part of both pedestals are raised and lowered. It is freely supported, the lower end touches the support shaft of the support plate, the upper end is equipped with a pressing cam, and is urged upward by a spring, so that when the pillar is vertical and the seat plate is vertical, the support plate An engagement release device that releases the engagement between the notch and the engagement pin by pressing the pressure cam from above against the pressure pin of the support plate, It is pivoted on the side, and the front end is close to the rear edge of the pillar when it is vertical, and the rear end is located directly above the recessed groove of the support plate, and when the pillar is horizontal, the front end is in the notch. A lever that can be engaged and rotated upward is fixed to the upper surface of the rail, etc., facing forward, and when the support plate is at the front end and the pedestal is vertical, the front part is elastic and moves into the recess of the support plate. The above-mentioned problem is solved by providing a stopper that fits into the recessed groove and prevents its retreat, and pushes the lever out of the recessed groove by the rear end of the lever, which is rotated by the notch when the pillar is tilted forward. This is an attempt to resolve this issue.

〔Example〕

The drawing shows the chairs of the present invention installed on the stepped floor stand 1 of the bleachers. In Fig. 1, the front chair A ₁ is in a seatable state, and the center chair A ₂ is folded vertically. The folded state and the rear chair indicate the folded and folded state.

A storage section 2 that is horizontal and has an open front end is formed below each floor platform 1, and inside the storage section 2, a pair of left and right suspension rails 3 facing each other is installed, and the front end is located closer to the opening surface. A support plate 4 is attached to the front end of the opposing surface of the running rod 3a of each rail 3, which protrudes up to this point.

As shown in FIGS. 2 and 3, the front part of both support plates 4 includes a front stop lever 5, a support shaft 6, and a rear stop, which are arranged in order at approximately equal intervals from the front lower end toward the rear upper side. Behind the front stop rod 5 connected with the rod 7,
Further, an engagement pin 8 is provided protrudingly below the support shaft 6.

Further, at the center of the inner surface of both support plates 4, the center of a lever 9 that faces approximately in the front-rear direction is pivoted with a pin 10, and a stop rod 11 is provided protruding above the rear end of the lever 9 at the rear. Similarly, below the stop rod 11 at the lower edge, a recessed groove 12 is cut from below.

A stopper 13 made of a leaf spring whose front part bends in a chevron shape is attached to the front of the upper surface of the lower part of the fixing rod 3b of the suspension rail 3, and in FIG. It fits into the entry groove 12 to prevent the lever 9 from retreating, and
The rear end is pushed up and comes into contact with the stop rod 11.

The pair of left and right pillars 14 of the chair _A2 shown in FIG. There is.

A back plate 16 is installed on the top of each pillar 14,
Similarly, in the lower part, there is a thin walled part 14a with the inner surface cut away.
A notch 17 is formed at the lower end, and the rear part is curved in an arc around the support shaft 6, and the front part protrudes downward.

Each pedestal 14 is supported by the support plate 4 in such a way that the notch 17 engages with the engagement pin 8 from the front and the lower part of the rear edge abuts the rear stop lever 7 from the front so that it cannot swing back and forth. , the lower rear edge of each pedestal 14 is close to the front end of the lever 9.

Above the elongated hole 15 on the opposing surfaces of both the pillars 14, a press rod 19 with a bearing plate 18, facing in the vertical direction and having its lower end in contact with the support shaft 6, is supported so as to be able to rise and fall freely. , a pressing cam 20 facing in the front-rear direction is fixed, and a pressure receiving groove 21 whose side surface is recessed in a downward F-shape is cut into the upper surface of the pressing cam 20, and the pressing rod 1
Between the bearing plate 18 and the pressing cam 20 at 9,
A compression spring 22 is wound around it.

Pressing cam 20 at the front of the opposing surfaces of both pillars 14
The upper part of the is connected with a pivot 23.
A pair of left and right support plates 24 facing forward are pivotally supported at both ends of the support plate 24. A press pin 25 is protruded from the rear end of the outer surface of the support plate 24, and a seat plate 26 is also provided on the upper surface. The seat plate 26 is held horizontally by contacting the upper edge of the thin wall portion 14a of the pedestal 14.

The distance between the pressing pin 25 and the pivot 23 is set to be slightly longer than the distance between the pivot 23 and the recessedmost part of the pressure receiving groove 21 in the state shown in FIG.

When the seat plate 26 of the chair A ₁ in the above state is flipped up and overlapped with the back plate 16, the chair A ₂ shown in FIG.
As shown, the pressing pin 25 rotates around the pivot 23 together with the support plate 24, enters the recessedmost part of the pressure receiving groove 21, and pushes down the pressing rod 19 together with the pressing cam 20 against the spring 22. However, the pressure rod 1
Since the lower end of 9 is in contact with the support shaft 6, the support pin 25 and the support plate 24 are pivotally attached to the support plate 24 with the pivot 23, and the elongated hole 15 of the lower end engages with the support shaft 6. Both pillars 14 rise, and their notches 17 separate from the engagement pins 8.

Therefore, as in chair A ₃ shown in FIG.
It can be tilted forward horizontally until it comes into contact with the front stop lever 5.

At this time, as shown in FIG. 5, the front end of the lever 9 is pushed up by the rotating notch 17, so that the rear end pushes up the chevron part 13a of the stopper 13.
The chair A ₃ can be pushed out of the recessed groove 12 of the support plate 4 and pushed into the storage section 2 at the rear, as shown by the arrow in FIG.

When the stored chair A ₃ is pulled out and placed vertically like chair A ₂ , the chevron portion 13a of the stopper 13 will elastically fit into the recessed groove 12 of the support plate 4, and the chair A ₂ will be pulled out. When the chair is locked so that it cannot be moved back, and the seat plate ₂₆ is laid down horizontally, the leg post 14 will be lowered and the notch 17 will engage the engagement pin 8, causing the leg post 14 to tilt forward, as in the case of chair A1. The seat will be locked and you will be able to take a seat.

[Effects of this invention]

As mentioned above, with the chair device of the present invention, simply by pulling it out from the storage part to the front end, raising it upright, and leveling the seat plate, the chair automatically becomes unable to move back and forth and cannot swing back and forth. It is safe because the lock is locked and the seat is ready to be seated, and the lock will never come off while the seat is seated.

In addition, there is no need to perform any particular lock release operation on the chair you were sitting on, just leave the seat and flip up the seat, and the legs will automatically fold forward.
Since it can be moved backwards by folding forward, the storage operation is much easier than with conventional chairs of the same type, and it is extremely convenient to use in spectator seats at stadiums and the like.

[Brief explanation of the drawing]

Fig. 1 is a side view of the chair of the present invention installed on a stepped floor stand, Fig. 2 is an enlarged central vertical sectional side view of the main part of the front chair in Fig. 1, and Fig. 3 is an enlarged front view of the chair in front. 4 is an enlarged central longitudinal sectional side view of the main part of the center chair in FIG. 1, and FIG. 5 is an enlarged central longitudinal sectional side view of the main part of the rear chair. A ₁ , A ₂ , A ₃ ... chair, 1 ... floor stand, 2 ... storage section, 3 ... suspension rail, 3a ... running rod, 3b ... fixed rod 4 ... support plate, 5 ... ...Front stop lever, 6... Support shaft, 7... Rear stop lever, 8...
Engagement pin, 9... lever, 10... pin, 11...
... Stop pin, 12 ... Recessed groove, 13 ... Stopper, 13a ... Chevron section, 14 ... Pillar, 14a ...
...Thin wall part, 15... Long hole, 16... Back plate, 17...
... Notch, 18 ... Bearing plate, 19 ... Pressing rod, 2
0... Pressing cam, 21... Pressure receiving groove, 22... Compression spring, 23... Pivot, 24... Support plate, 25... Pressing pin, 26... Seat plate.

Claims (1)

[Scope of utility model registration request] A pair of left and right rails are provided in a horizontal storage section with an opening at the front, directly below the floor table, and each has a running rod that can protrude forward from the opening. A recessed groove is cut from below at the rear of the
A support plate is connected to the front stop lever, a support shaft, and a rear stop lever, and has an inwardly facing engagement pin protruding thereon. A thin-walled part is formed in the lower part of which the opposing surface is recessed, and a vertically facing elongated hole drilled near the lower end fits into the supporting shaft of the support plate, allowing it to move from a vertical position to a forward horizontal position. Rotatable up to
It is pivoted so as to be slightly movable in the vertical direction, and a notch cut in the lower end with the front part protruding downward engages with the engagement pin of the support plate from the front, and the rear edge of the support plate is connected to the rear of the support plate. A pair of left and right pillars were oriented vertically and locked by contacting the stop lever, and a seat plate was installed on the top surface, and the rear part was pivoted to both ends of the pivot of both pillars, and a seat plate was installed through the rear end. When the press pin comes into contact with the upper end of the thin part of the pedestal, the bottom end is supported by the pair of left and right support plates that hold the seat plate horizontally when the pedestal is vertical, and by the thin part of both pedestals so that it can rise and fall. It comes into contact with the support shaft of the plate, and is equipped with a pressing cam at the upper end.
When the pedestal is biased upward by the spring and the seat plate is vertical when the pedestal is vertical, the pressing cam is pressed from above against the pressing pin of the support plate, raising the pedestal and engaging the notch. An engagement release device for releasing the engagement of the dowel pin, facing in the front-rear direction, the center portion of which is pivoted to the side surface of the support plate, the front end of which is close to the rear edge of the pillar when it is vertical, and the rear end of which is disposed of. a lever located directly above the recessed groove of the support plate and whose front end engages with the notch and is rotated upward when the pillar is horizontal; and a lever fixed forwardly to the upper surface of the rail etc. When the support plate is at the front end and the pedestal is vertical, the front part elastically fits into the recessed groove of the support plate to prevent it from retreating, and when the pedestal is tilted forward, the notch rotates. A chair device for a spectator seat, comprising a stopper that is pushed out from a recessed groove by the rear end of a lever that can be moved.