JPH0618531Y2 - 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. When the raking lever is started, the chair detection sensor is arranged in front of the leg guide to detect the arrival of the leg.

[Problems to be solved by the device]

Therefore, the lift lever is started at a preset timing after detection, and the positional relationship between the lift lever and the chair may be incorrect depending on the operation state of the trolley, etc. There was a problem with the reliability of the operation, such as when the chair occurred and when the chair fell down, it made an empty motion.

Therefore, an object of the present invention is to improve the reliability of the lifting operation of the horizontal bar 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 detects a horizontal bar for starting the lifting lever at the reaching position of the lateral intermediate portion of the horizontal bar between the lift chain tip and the lifting lever at the standby position. The sensor was placed.

[Action]

When the middle part of the horizontal bar provided between the front legs of the chair approaching along the leg guide passes above the raking lever at the standby position and is detected by the horizontal bar detection sensor, this detection In response to the signal, the lift lever starts to operate. As a result, the horizontal bar is constantly lifted up at the normal position and is pulled to the predetermined 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 driven by drive wheels 17 and chair 1
Is a trolley for stacking. 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 that 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 14 is provided, in which each link has, for example, an inverted L-shaped hook 13 protruding therefrom. The distance between the leg mounting rail 12 and the lift chain 14 corresponds to the height from the tip of the 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, the sprockets 16c, 16d, and the drive wheels 17 are 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 in an enlarged manner, the horizontal position of the horizontal bar 1e between the standby position of the lifting lever 20 (the solid line position in the same figure) and the tip of the lift chain 14, that is, the direction between the front legs 1a on both sides. At the arrival position of the intermediate portion, a limit switch 25 having an actuator lever 25a capable of elastically returning to the original position is arranged as a horizontal bar detecting sensor.

Further, a motor control unit is attached to the motors 16 and 22, and in response to a detection signal of the limit switch 25, the lifting lever 20 rotates a predetermined angle for the horizontal bar to be locked and the motor 22 is rotated. After a predetermined period of time after this detection, 16 is driven so that the lift chain 14 moves for one link section, and then the lifting lever 20 is reversely rotated to return to the standby position. However, the returning operation of the lifting lever 20 and the starting 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.

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. 4, when the actuator lever 25a of the limit switch 25 comes into contact with the middle portion of the horizontal rod 1e, the lifting lever 20 starts to operate, and the horizontal rod 1e is lifted, so that the lower end of the front leg 1a is lifted. The horizontal bar 1e moves to the gap 13a between the hooks 13 at the tip end while leaning against the tip of the leg placement rail 17 (see FIG. 1),
The lift chain 14 is locked in the process of operating for one link section, and the front leg 1a is mounted on the leg mounting rail 12 and pushed up.

The actuator lever 25a has returned to the normal standby position due to its elasticity after traversing the horizontal bar 1e, and the scraping lever 20 also rotates backward to the standby position.

Next, the carriage 10 is further advanced, the next chair 1 is locked in the same manner and the lift chain 14 is moved by one pitch, and in the following, a large number of chairs 1 are locked by the hooks 13 and the leg mounting rails. Collected on 12.

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

As the horizontal bar detection sensor, a pressure sensor mounted on a lever that can elastically return to the original position, a proximity switch arranged in proximity to the passage position of the intermediate portion of the horizontal bar 1e, etc. may be considered. To be

[Effect of device]

As described above, according to the present invention, since the start of the lifting lever responds to the detection signal of the sensor that directly detects the horizontal bar that has reached the lifting position, the accuracy of the lifting operation is significantly improved. Moreover, in order to detect the passage of the middle part of the horizontal bar,
Even when the chair tilts with respect to the traveling direction of the trolley and enters the leg guide, the operation timing of the lifting lever can be set more accurately than when one leg is detected. Therefore, malfunctions such as locking mistakes of the chair, falls, and empty motions do not occur.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 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 embodiment, and FIG. FIG. 4 is a schematic plan view of the automatic chair laying machine according to the same embodiment, and FIG. 4 is a side view of essential parts of the automatic chair laying machine according to the same embodiment. 1 …… Chair, 10 …… Bogie, 11 …… Leg guide, 12 …… Leg mounting rail, 13 …… Hook, 14 …… Lift chain, 20…
… Raising lever, 25 …… Limit switch.

Claims (1)

[Scope of utility model registration request] 1. A leg guide projectingly inserted into a chair between legs of a chair, and legs juxtaposed on both sides with the front legs on both sides placed and inclined so as to guide diagonally upward. A mounting rail, a large number of hooks projecting outward at a predetermined pitch, and a lift chain arranged above the leg mounting rail, and rotatably arranged at the tip of the lift chain,
In addition, by lifting up the horizontal bar provided between the front legs of the chair approaching along the leg guide and pulling it up, a lifting lever that locks to the hook is arranged, and the lift chain attaches the horizontal bar to the hook. The chairs are automatically collected in sequence along the leg mounting rails every time they are locked and moved by a predetermined pitch, and the chairs thus constructed are laid by moving the lift chain in the opposite direction. In the automatic laying machine, the horizontal bar detection sensor for starting the lifting lever is arranged at the position where the horizontal middle portion of the horizontal bar between the lift chain tip and the lifting lever at the standby position is reached. A characteristic chair automatic laying machine.