JPH06993Y2 - 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.

[Prior Art] As an automatic chair laying machine of this type, according to JP-A-63-270006, a trolley, a leg guide inserted between the legs of the chair, a leg mounting rail inclined upward, An inverted L-shaped hook (see FIG. 5) is provided so as to project outward, and a lift chain is disposed above the leg mounting rail, and is rotatably disposed at the tip of the lift chain and is also a leg guide. It is well known that a horizontal bar provided between the front legs of a chair that is approaching along with is lifted up and pulled to pull up a horizontal bar, and a lifting lever that is locked to a hook is provided. Then, the horizontal bar 2 is locked in the space 3a between the link 3 and the link base surface 3c of the hook 3 of each link, and the lift chain is reversely rotated and disengaged from the hook 3 during the arrangement.

[Problems to be solved by the device]

However, to securely lock the horizontal bar 2, the claws
The length of 3b must be set according to the width of the horizontal bar 2, and accordingly, the horizontal bar 2 is difficult to come off during the laying, the hook 3 or the horizontal bar 2 may be deformed, or a laying error may occur. There was a problem with the reliability of the operation.

Therefore, an object of the present invention is to improve the reliability of the engaging and disengaging operations of the horizontal bar with respect to 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 two claw portions in which the hooks of each link project on both sides in the moving direction of the lift chain, and are spaced apart to the extent that the horizontal bar is engaged with the link base surface. Is formed. The gap between the claw portions of the adjacent links is narrower than the width of the horizontal bar so that the horizontal bar does not engage and disengage when they are on the same plane, and at the horizontal bar locking position at the tip of the lift chain. It is set to be wider than the width of the horizontal bar so that the horizontal bar is engaged when the adjacent links are bent to each other for folding back.

[Action]

In a normal state in which adjacent links are on the same plane as each other, the horizontal bar is locked between the link base surface and the two claw portions separated on both sides adjacent to each other. When the horizontal bar is locked, the adjacent links are easily engaged with each other with the distance between the claw portions widened. When laying a chair, adjacent links open each other to increase the distance between the claws, and the claws on one side are easily engaged and disengaged.

〔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. As shown in FIG. 2, the chair 1 has a front leg 1a provided on a seat plate 1d with a back support 1c, which is narrower than a rear leg 1b. The seat plate 1d is configured to be able to sink 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, a lift chain 14 having hooks 13 projecting from each link is provided above the rail.

As shown in FIG. 4, the hooks 13 are spaced from the side plates 14b of the rollers 14c connecting the adjacent links by an interval corresponding to the diameter of the horizontal bar 1e with respect to the link base surface 14b, and the horizontal bar 1e.
Is formed in a T-shape by projecting claw portions 13a having a length substantially corresponding to the radius toward both sides in the moving direction of the lift chain. And the gap between the claw portions 13a is narrower than its width so as not to disengage the horizontal bar 1ee when they are on the same plane as each other,
The link 14a is set to be wider than its width so that the horizontal bar 1e is engaged when the link 14a comes to the vertical folding position and the preceding ones are mutually bent.

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 includes a reducer 16a, a chain 16b, and a sprocket 16
It is driven by the motor 16 via c and 16d.

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.

A motor controller is attached to the motors 16 and 22, and the motor 22 is lifted in response to a detection signal from a chair detection switch (not shown) attached to the leg guide 11, for example.
Is driven to rotate by a predetermined angle due to the horizontal bar locking, and the motor 16 is driven so that the lift chain 14 moves for one link section after a predetermined time after the detection, and then the lifting lever. It is configured to reverse 20 and return to the standby position. 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, in response to a manual operation, the drive wheel 17 is driven by a dedicated motor, and is further reversed when the chair 1 is laid.

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.

When the chair detection switch detects that the chair 1 has reached the raising position, the raising lever 20 (the position indicated by the chain line in Fig. 1)
Is activated, the horizontal bar 1e is lifted up, the lower end of the front leg 1a hits the tip of the leg mounting rail 12 and is tilted (position indicated by the solid line in FIG. 1), and the horizontal bar 1e is vertically hooked with the hooks 13 and 1 Gap 13b, which is the horizontal bar locking position between the claws 13a of the hook 13 above the pitch
Is attracted to and pressed against. Then, in the process in which the lift chain 14 operates for one link section, the claw portions 13 on both sides are
It is locked between a (see FIG. 4), the front leg 1a is further placed on the leg mounting rail 12 and pushed up, and the raking lever 20 is rotated backward to the standby position.

Next, the trolley 10 is further advanced, the next chair 1 is locked in the same manner, the lift chain 14 moves one pitch, and in the following, a large number of chairs 1 are locked to the hooks 13 in order, and the leg mounting rail 12 Recovered on.

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 sequentially dropped. At this time, it is locked by one of the claw portions 13a. Since it is released from the state, the locking length can be significantly shortened as compared with the conventional L-shape, and it can be easily disengaged.

[Effect of device]

As described above, according to the T-shaped hook of the present invention, since the space for locking the horizontal bar is formed by the claw portions on both sides, the required length of the claw portions can be shared by each of the claw portions, which is reliable. The engagement and disengagement can be facilitated while the locking of the horizontal bar is guaranteed. Therefore, the accuracy of the laying operation of the chair is significantly improved, and the hook or the chair is not damaged due to a mistake in engagement and disengagement. In other words, the design in which the dimensional accuracy and deformation of the hook are distributed is unnecessary.

[Brief description of 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. 3 is a chair according to the same embodiment. Fig. 4a is a schematic plan view of the automatic laying machine, Fig. 4a is a side view of a main part of the chair automatic laying machine according to the same embodiment, Fig. 4b is a sectional view of a link of the same embodiment, and Fig. 5 is a side view of a conventional hook. It is a figure. 1 ... Chair, 10 ... Bogie, 11 ... Leg guide, 12 ... Leg mounting rail, 13 ... Hook, 13a ... Claw part, 14 ... Lift chain, 20 ... Raising lever.

Claims (1)

[Scope of utility model registration request] 1. A trolley comprising a leg guide projectingly inserted between the legs of a chair, and leg placement rails juxtaposed on both sides to place the legs on both sides and guide them upward. A lift chain that is arranged upward along the leg mounting rail and that is composed of a large number of links with hooks projecting outward, and a rotatably arranged distal end portion of the lift chain, and A horizontal bar provided between the front legs of the chair approaching along the leg guide is lifted up, and it is pulled toward the tip of the lift chain to lock it on the hook. Every time the lift chain is locked and the lift chain moves one link section at a time, chairs are automatically collected in sequence along the leg mounting rails, and the chairs thus collected are laid by moving the lift chain in the opposite direction. Chair self In the moving laying machine, the hooks of the respective links are formed by two claw portions which project on both sides in the moving direction of the lift chain and are spaced apart so that the horizontal bar engages with the link base surface. The gap between the claw portions of the link is narrower than the width of the horizontal bar so as not to engage and disengage the horizontal bar when they are on the same plane, and the links that are adjacent to each other at the rod locking position at the tip of the lift chain. Is set to be wider than the width of the horizontal bar so that the horizontal bar can be engaged with each other when they are bent to each other.