JPH06989Y2 - Chair automatic laying machine - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an automatic chair laying machine for laying and collecting a large number of chairs in a large conference hall, a gymnasium or the like.

[Conventional technology]

As an automatic chair laying machine of this type, according to Japanese Patent Laid-Open No. 63-270006, a trolley, a leg guide inserted between the legs of the chair, a leg mounting rail inclined upward, and a large number of hooks facing outward are provided. A lift chain protrudingly arranged above the leg mounting rail, and a horizontal bar rotatably arranged at the tip end of the lift chain and provided between the front legs of the chair approaching along the leg guide. It is well known that a scraping lever that is engaged with the hook by disposing the scraper and pulling it up is provided. Then, the lift chain is moved by one pitch and locked to the hook while the horizontal bar is pulled to the locking position on the chain surface by the lifting lever.

[Problems to be solved by the device]

However, due to variations in the height of the horizontal bar, deformation of the chain due to weight increase in the process of stacking the lattice, or lifting, etc. There was a problem that the relationship with the actual drawn horizontal bar position did not match, resulting in a locking error.

Therefore, an object of the present invention is to improve the reliability of the horizontal bar locking operation by the hook in the automatic chair laying machine of the type described above.

[Means for Solving the Problems]

In order to achieve this object, the present invention has chain rails juxtaposed on both sides of the lift chain in the moving direction, and has projections on both sides of each link for restraining the lifting of the link on the back side of the chain rail. Provided,
The horizontal bar locking position of the hook is set to a height at which the front leg can be lifted from the floor surface in the horizontal bar locking state. Then, the tip of the chain slides into the horizontal bar that has reached the scraping position, and ascends toward the tip of the lift chain, and the base end is positioned at the horizontal bar locking position. The tip of the rail is extended to be integrally formed.

[Action]

Even if the lift chain tries to float as the weight increases, the projections on both sides of the link are restrained by the chain rail. The horizontal bar is not affected by variations in the height of the horizontal bar, deformation of the chain, etc., and is lifted up along the horizontal bar guide rail by the lifting lever to be guided to the horizontal bar locking position.

〔Example〕

1 to 4 show an automatic chair laying machine according to an embodiment of the present invention.

In these figures, 10 is a dolly which is moved by driving wheels 17 and stacks the chair 1. In this chair 1, as shown in FIG. 2, the intervals between the front legs 1a provided on the seat plate 1d with the backrest 1c are narrower than the intervals between the rear legs 1b, and the chairs are connected to each other in the front-back direction at the bottom, The seat plate 1d is configured to sneak into the front seat plate 1d. A horizontal bar 1e is provided above the front legs 1a with a gap from the seat plate 1d.

First, a leg guide 11 which is inserted between the legs 1a and 1b of the chair 1 is horizontally provided on the carriage 10 so as to project rearward. Further, on both sides of the carriage 10, two leg mounting rails 12 that are aligned with the mutual distance between the front legs 1a are juxtaposed so that the front legs 1a are mounted and guided upward. Further, above the rail, a lift chain in which, for example, a T-shaped hook 13 is projectingly provided on each link
14 are provided. Footrest rail 12 and lift chain
The distance from 14 corresponds to the height from the tip of the front leg 1a to the horizontal bar 1e. The lift chain 14 is driven by the motor 16 via the reduction gear 16a, the chain 16b, and the sprockets 16c and 16d, and the drive wheels 17 are also driven by a dedicated motor.

On both sides of the tip of the cart 10, a lifting lever 20 for pulling the horizontal bar 1e of the chair 1 approaching along the leg guide 11 is provided. This lifting lever is fixed to a support plate 21a fixed to the rotary shaft 21, this support plate is driven by a motor 22 via a link 22a, and the other side is also driven by a lever 22b connected to this link.

As shown in FIG. 4, between the sprockets 16c at both ends of the lift chain 14, chain rails mounted on the base 27a are provided.
27 are located on both sides. The support shaft of the roller 14b that connects the link side plate 14d that forms the hook 13 is extended to form the protrusion 14c, and the floating of the chain rail 27 is restricted by the back surface of the chain rail 27.

As shown in FIG. 5, each link 14a of the lift chain 14
The hook 13 is a T-shape having claws 13a formed on both sides in the direction of movement of the lift chain, and is spaced from the link base surface 14e according to the diameter of the horizontal bar 1e, and its length is It corresponds to the radius. The gap between the adjacent claw portions 13a is
When they are on the same plane, the width of the horizontal bar 1e is narrower so that the horizontal bar 1e is not disengaged, and the horizontal bar 1e is bent when the link 14a that has come to the vertical folding position and the preceding link 14a are bent to each other. It is set to be wider than the width so that it can be engaged.

Furthermore, as shown in FIG. 5, the chain rail on one side is
27 extends forward to form a horizontal bar guide rail 25. That is, this horizontal bar guide rail has a base end portion 25a.
To form the horizontal bar locking position 13b, it is formed downward in a stepped manner so that the tip ends of the claw portions 13a of the links 14a which are in the vertical state at the most distal folding position are leveled.
Further, the tip end portion 25b is formed so as to incline downward toward the front side, and the tip end portion 25b is formed so as to sneak into the horizontal bar 1e which has reached the scraping position. Also, the distance between the horizontal bar guide rails 25 is
The height of the little chain 14 is set so as to be narrower than the space between the 1a, so that the front leg 1a that has come to the horizontal bar locking position 13b floats from the floor.

A motor control unit is attached to the motors 16 and 22, for example, in response to a detection signal from a chair detection switch (not shown) provided on the leg guide 11, the motor 22 is lifted up and the lever 20 is locked by the horizontal bar. The motor 16 is driven so as to rotate by a predetermined angle, and the motor 16 is driven so that the lift chain 14 moves only one link section after a predetermined time after this detection, and then the lifting lever 20 is reversely rotated to move to the standby position. Is configured to return to. However, the return operation of the lifting lever 20 and the start of the lift chain 14 may be made to respond to a detection signal for confirming the lock by disposing another horizontal bar detection sensor in each link. Further, the driving wheels 17 are driven by a motor by a manual operation, and further, when the chair 1 is laid, it is reversed.

Next, the operation will be described.

When recovering the chairs 1 arranged on the floor, the drive wheels 17 are operated to move the cart 10 backward, and the leg guides 11 are inserted between the legs 1a and 1b of the chair 1.

As shown in FIG. 5, when the chair detection switch detects the chair 1 in the raised position, the lift lever 20 starts operating and lifts the horizontal bar 1c and slides the horizontal bar guide rail 25 to slide the front legs. Raise 1a. Further, the lower end of the front leg 1a hits against the tip of the leg mounting rail 12 and tilts, and the horizontal bar 1e becomes a claw portion.
It is pressed against the horizontal bar locking position 13b formed by opening the space between 13a (see the solid line in FIG. 1 and the chain double-dashed line in FIG. 5). Then, the movement process of one link section of the lift chain 14 is closed and the horizontal bar 1e is locked. Then, the raising lever 20 is turned to the standby position in the reverse direction to further move the carriage 10 forward, and the next chair 1
Are stacked in the same manner, the lift chain 14 is moved by one pitch, and a large number of chairs 1 are sequentially collected on the leg mounting rails 12 while being locked by the hooks 13.

When laying the chair 1, the carriage 10 is moved forward, the lift chain 14 is reversed, the leg mounting rail 12 is slid, the hook 13 is opened, and the chair is dropped.

[Effect of device]

As described above, according to the present invention, the chain rail prevents the lift chain from rising due to stacking of chairs. Furthermore, since the chair is guided to the horizontal bar locking position with the horizontal bar guide rail formed by the extension, the influence of the dimensional variation of the lift chain or chair is avoided, and the lifting operation is performed. The accuracy of is greatly improved.

[Brief description of drawings]

1 is a schematic side view of an automatic chair laying machine according to an embodiment of the present invention, FIG. 2 is a perspective view of chairs stacked by the automatic chair laying machine according to the same embodiment, and FIG. 3 is a chair according to the same embodiment. FIG. 4 is a schematic plan view of the automatic laying machine, FIG. 4 is a sectional view of each link of the lift chain according to the same embodiment, and FIG. 5 is a side view of essential parts of the automatic chair laying machine according to the same embodiment. 1 ... Chair, 10 ... Cart, 11 ... Leg guide, 12 ... Leg mounting rail, 13 ... Hook, 13a ... Claw, 14 ... Lift chain, 14c ... Protrusion, 20 ... Raising lever, 25 ... Horizontal bar guide rail , 27 ... Chain rail

Claims (1)

[Scope of utility model registration request] 1. A leg guide projectingly inserted into a chair between legs of a chair, and leg mounting rails arranged side by side so that the legs on both sides are placed and guided obliquely upward. And a loop-shaped lift chain which is arranged upward along the leg mounting rail and which is composed of a number of links each of which has a hook projecting outward, and a rotatably arranged end portion of the lift chain. And a lifting lever that pulls up the horizontal bar provided between the front legs of the chair that is approaching along the leg guide and pulls it towards the tip of the lift chain to lock it on the hook. Every time the lift chain is moved by one link section by locking the horizontal bar to the chair, the chairs are automatically collected in order along the leg mounting rails, and the chairs thus collected are moved in the opposite direction of the lift chain. As laid by moving In the automatic chair laying machine, the chain rails are juxtaposed on both sides of the lift chain between both ends in the moving direction, and the backs of the chain rails are provided on both sides of each link to restrain the lifting of the link. Set the locking position to a height that allows the front legs to float from the floor when the horizontal bar is locked, and the tip goes underneath the horizontal bar when it reaches the scraping position and rises toward the tip of the lift chain, The section is an automatic chair laying machine characterized in that a horizontal bar guide rail formed so as to be located at the horizontal bar locking position is integrally formed by extending the chain rail.