JPH04218105A - Cart lifting device for automatic chair setting and collecting device - Google Patents

Abstract

PURPOSE:To provide a cart lifting device for facilitating a smooth run when a power device is provided on either of the carts by making it possible to use commonly, for carts of a chain setting and collecting device, a driving force device equipped with a chain holding device, driving wheels for running and a steering wheel. CONSTITUTION:In the middle of base 11 of a cart, a space is provided to allow a frame 20a of the driving force device to enter to be provided. On the frame, a driving member provided with a driving surface 26c that displaces from the original position toward the lateral outward direction and an actuator that displaces this driving member are provided in such a manner that the pressed portion 11b on the rear surface of the base 11 is pressed. At least on one of the the pressed surface 11b and a driving surface 26, a downward, lateral outward gradient is formed in such a manner that the base 11 is raised when the driving member moves in the lateral outward direction.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a plurality of trolleys on which a large number of individual or multiple chairs are placed in conference halls, gymnasiums, etc., and a chair that is detachably attached to any of these trolleys. An automatic chair laying/recovering machine that is composed of a gripping device, a power unit equipped with a driving wheel for traveling, and a steering wheel, and the automatic chair laying/recovering machine floats the cart with the power unit attached to the cart. This invention relates to a lift device.

0002

[Prior Art] As an automatic chair installation and recovery device,
According to Japanese Patent Application Laid-open No. 1-150633, a chair is gripped by a gripping tool in a groove formed in the back of the chair, and the chair is engaged with a horizontal chair hanging rail to be recovered, and the gripping tool is moved back to perform laying. It is well known that this was done.

0003

[Problems to be Solved by the Invention] However, in such a conventional device, a power device for automatically processing the chairs and moving the trolley is integrally mounted on the trolley for collecting chairs.
Therefore, the structure of each truck was bulky and expensive. Therefore, it may be possible to use a power device including a chair gripping device and a driving wheel for traveling in common for a plurality of carts.

[0004] The present invention has been developed in view of the fact that when a power unit is attached to a bogie and the bogie is running, it becomes difficult to smoothly steer and run if the bogie is affected by the wheels of the bogie. The purpose of the present invention is to provide a trolley lift device for an automatic chair laying/recovery machine that levitates.

[0005]

[Means for Solving the Problems] In order to achieve this object, the present invention provides a plurality of trolleys on which a large number of chairs are collected and placed in a stacked state, and a system that can be freely attached to and detached from any of these trolleys. An automatic chair comprising a chair gripping device that is attached to a chair and reciprocates between a floor installation position and a collection position to automatically set up and retrieve the chair, a power unit equipped with a driving wheel for traveling and a steering wheel. In order to achieve the above-mentioned purpose in a laying/recovering machine, there is a trolley lift device for levitating the trolley when operating the traveling drive wheels with the power unit attached to the trolley. In the horizontal middle part,
A gap is provided in which the base of the power unit enters and is installed.
At the base of the power device, drive members on both sides that are displaced laterally outward from their original positions are placed so as to push the pressed members provided on the back side of the base of the trolley on both sides of the gap in the lateral direction, and these drive members are moved laterally. An actuator for displacing each outward is provided, and at least one of the contact portions of both the driving member and the pressed member is provided with a downward direction so that the pressed member is lifted when the driving member is laterally displaced outward. It is characterized by the formation of an inclined surface that faces laterally outward.

[0006]

[Operation] When the actuator is operated with the base of the power device inserted into the gap in the lateral middle part of the truck base and the power device is attached to the truck, the drive member is displaced laterally outward and The pressed member is simultaneously pressed laterally outward on both sides. As a result, the pressed member is pushed up along the laterally outwardly inclined surface of the mutually contacting portions.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 11 show an automatic chair laying/retrieving machine according to an embodiment of the present invention, and FIG. 11 shows a chair to be processed by the machine. This chair 1 is provided with a horizontal bar 1b spaced apart from the seating part 1d above between the front legs 1a, and between the rear legs 1c of the chair 1 in front in a forward leaning state, the seating part of the next chair 1 from behind is provided. 1d is configured to be penetrable for stacking.

In FIGS. 2 to 4, reference numeral 10 denotes a trolley, ie, a dolly, for collecting the chair 1. This trolley has rail-like bases 11 on both sides on which the lower ends of the front legs 1a of the chair 1 are placed,
The chair guide bars 12 are provided on both sides in the same manner as rails, which are horizontally installed on this base, and which are inserted between the legs 1a and 1c to support the horizontal bar 1b in a forward-inclined state. The rail-shaped bases 11 on both sides are connected by a handle 13 at the rear and by a connecting bar 11a at the front entrance/exit side. The distance between the base 11 and the chair guide bar 12 is such that the front legs 1 are in a forward leaning state where the center of gravity of the chair 1 moves to the front of the lower end of the front legs.
This corresponds to the dimensions of the lower end of a and the horizontal bar 1b. The distance between the chair guide bars 12 on both sides corresponds to the distance between the front legs 1a. Casters, that is, wheels 15 are attached to the front, rear, left, and right sides of the base 11.

A stopper 18 with a U-shaped guide groove is provided at the rear end portion of the chair guide bar 12 for inserting the horizontal bar 1b of the tilted chair 1 and restraining it at an intermediate position. Further, the tip end 12a of the chair guide bar 12 is tapered and extends downward so that it can be easily inserted between the front legs 1a of the chair 1 installed on the floor and enter close to the bottom of the horizontal bar 1b. It is tilted towards. Further, the tip of the base 11 similarly slopes downward and protrudes shorter, but has a slightly steeper angle so as to make it easier for the chair 1 to lean forward during installation. A pin hole is formed in the rear end portions of the base portions 11 on both sides, into which a connecting pin 19 is set through the connecting plate 19a, so that the carts 10 can be connected in a juxtaposed state.

FIGS. 5 and 6 show a power unit 20, in which a battery 2 is used as a power source for driving each motor to be described later.
It is equipped with 1. First, the motor 22a moves the frame 20
A drive wheel 22 provided below is driven, and a steered wheel 23 is controlled by a motor 23a. The width of the frame 20a in the lateral direction is such that it can be inserted into the gap between the base parts 11 in a close state.
This corresponds to the gap interval. A stopper frame 20b is protruded from both sides of the rear end portion of this frame, and a pin hole is formed so that the connecting pin 39 can be set through the connecting plate 39a.

Frame 20a which is the base of power unit 20
Rails 28 are installed on both sides of the chair guide bar 12 so as to be set below the chair guide bar 12, and on which gripping device bodies 27 on both sides are attached. These gripping device bodies are fixed to chains 291 on both sides arranged along the rail 28. This chain is attached to a guide gear 296, an adjustable gear 297 and a drive gear 295. This drive gear meshes with both sides of a rotating shaft fixed to a drive wheel 294, and this drive wheel rotates in forward and reverse directions.
2 via a speed reducer 293 and a timing belt.

Furthermore, a pair of left and right truck lift devices 26, indicated by dotted lines, are attached to the back side of the frame 20a. Each part has its rear end connected to a pin 26 as shown in FIG. 1A.
The power cylinders 264 on both sides are hinged at 1 and have a built-in threaded rod 263 driven by a motor 262;
an arm 265 hinged with a pin 300 at the arm 20a; a rod 267 whose tip end is hinged with a pin 301 at an intermediate position of the arm; a rod 267 whose rear end is hinged with a pin 302, and whose outer end and an arm 268 hinged with a pin 303. The arms 265 and 268, which extend diagonally laterally and outwardly from the inside in a normal state, each have drive parts 26a and 26b that protrude in the vertical direction from the hinge position so as to function as rotary lift drive members. ing. As a result, the threaded rod 26
In the normal position shown by the solid line 3, the drive parts 26a, 26b are in the inner retracted position. When the threaded rod 263 rotates and protrudes, the drive portion 26a is rotated and displaced to the position indicated by the two-dot chain line, and the drive portion 26b is also interlocked by the linking action of the rod 267 to occupy the position shown by the two-dot chain line. Drive section 26a
, 26b, the drive surface 26c is an inclined curved surface that faces downward and laterally outward at the displacement position, as shown in FIG. 1B.
It is formed as. Therefore, the front, rear, left, and right drive surfaces 26c are displaced laterally outward, so that they come into contact with the pressed surface 11b, which is the back end of the base 11 as the pressed member of the truck 10, and form the inclined surface of the drive surface 26c. It is designed so that it can be floated along. The pressed surface 11b is also a slightly curved surface inclined laterally outward. The arm 265 is sufficiently longer on the inside than the outside of the hinge position, and sufficient pressing force can be obtained by the lever principle.

[0013] As for the truck lift device, in the above embodiment, the left and right drive mechanisms may use a common motor, or the drive member may be linearly displaceable in the lateral direction, and an actuator may be used to move the drive member linearly forward and backward. It is also conceivable to configure it so that it is driven.

As shown in FIGS. 7 and 8, the gripping device main body 27 is attached to rails 28 on both sides, respectively.
It is fixed to the chain 291 and the rail 28 is connected to the roller 2.
A movable table 271 that runs while being held by the chair guide bar 72, and a laying hook 277 that faces each other in the direction of the rails and is swingably erected with a height that projects from the chair guide bar 12.
and a collection hook 273. The collection hooks 273 on both sides are rotatably attached to a common rotating shaft 274 that traverses, and a weight 275 is attached on the opposite side.
are installed respectively. This weight is on the moving platform 271
By being restrained by a stopper pin 276 protruding from the inner rotation path of the hook 273, the forward rotation of the hook 273 from the horizontal bar locking position in the vertical direction is restrained. Also, hook 2
When the horizontal bar 73 is pushed from the front by the horizontal bar 1b and rotated backward, the weight 275 causes the horizontal bar 1b to return to the horizontal bar locking position when the horizontal bar 1b passes to its locking side. Similarly, the installation hooks 277 on both sides are rotatably attached to a common rotating shaft 278, and a weight 279 is attached on the opposite side.
are installed respectively. This weight is on the moving platform 271
The hook 277 is restrained by a stopper pin 280 detachably attached to the horizontal bar 1b, thereby restraining the hook 277 from rotating rearward from the vertical horizontal bar locking position, and when being pushed by the horizontal bar 1b and rotating forward. , the horizontal bar 1b is returned to the horizontal bar locking position when it passes to the locking side.

A control circuit (not shown) is attached to the power plant 20, and a control box (not shown) is connected via a cable to supply command signals to the control circuit. As a result, the motors 22a and 23a perform drive control of forward and backward movement and steering, and the forward and reverse rotation of the motor 262 drives and controls the raising and returning of the bogie lift device 26. The rotational speed sensor of the drive wheel 22 detects the running pitch, and when a predetermined running pitch is detected, the running pitch is automatically stopped, and the motor 292 drives and controls the recovery or laying operation. The timing of the installation and recovery operations is set in cooperation with a sensor that detects the moving position of the gripping device main body 27 on the rail 28, a sensor that detects its contact with the chair, and the like.

During work, the power unit 20 is inserted into the trolley 10 from the handle 13 side, and the stopper frames 2 on both sides are
The tip end surface 20c of 0b is connected to the rear end surface 11 of the base 11 of the trolley 10.
Bring it into contact with c. When the trolley lift device 26 is started in this state, the driving parts 26a and 26b are laterally and laterally displaced, so that the driving surface 26c presses the pressed surface 11b of the base 11 located slightly above. increase. This results in
The trolley 10 is mounted on the power unit 20 and can be smoothly moved and steered to the laying position or the recovery position without being restrained by its casters.

The operation for laying the cable will be explained with reference to FIG. The gripping device main body 27 retreats from the most advanced standby position toward the horizontal bar 1b of the most advanced chair 1 collected by the chair guide bar 12 (FIG. 2A). When the laying hook 277 is moved further backward and comes into contact with the horizontal bar 1b, it rotates against the weight of the weight 279 (B in the same figure), and when it passes to the locking position, the horizontal bar is locked by the weight 279. Return to position and stop (
Figure C). Next, when it is moved forward in the opposite direction, the hook 277 locks the horizontal bar 1b while being restrained by the stopper pin 280 and pushes it forward (D in the figure). When the chair guide bar 12 reaches the inclined position, the chair 1 rises due to the movement of its center of gravity, the horizontal bar 1b comes off (E in the same figure), and on the way, the chair 1 rises up more firmly due to the greater descent of the base 11. It is laid on the floor (Figure F). The hook 273 is lowered lower than the horizontal bar 1b (G in the figure), the trolley 10 is moved backward by a predetermined running pitch, and the next chair 1 is laid in the same manner.

When all the chairs 1 collected on the trolley 10 have been laid, the trolley is moved to a predetermined position and the trolley lift device 26 is operated to return to the driving section 26a.
, 26b return to their original positions and lower the trolley 10 to the floor. Next, similar laying processing is performed on another trolley 10 in the recovered state.

At the time of collection, the installation hook 2 is removed by pulling out the stopper pin 280 and releasing the restraint of the weight 279.
Rotate 77 backwards to a lower position. As shown in FIG. 10, the recovery hook 273 advances toward the horizontal bar 1b of the chair 1 installed (A in the same figure), and upon contact, the weight 27
5 and rotates backwards (B in the same figure). When the hook 273 reaches the lowest position, the horizontal bar 1b passes to its locking side and returns to the vertical direction with respect to the rail 28 by the weight 275 (FIG. C). By moving in the opposite direction, the horizontal bar 1b is locked and the chair 1 gradually leans forward (D in the same figure), and when it comes to the horizontal position, the horizontal bar 1b occupies a position slightly above the hook 277 in a low position (in the same figure). E). As a result, when the horizontal bar 1b reaches the collection position, the hook 273 is moved forward without colliding with the horizontal bar 1b, and the next collection is performed (FIG.
).

[0020] When the specified number of chairs 1 have been collected, the trolley 1
0 is moved to a predetermined position and installed on the floor using the trolley lift device 26. Next, the empty truck 10 is connected to the power device 20.
The same collection work will be carried out by placing it on the

[0021]

As described above, according to the present invention, when the trolley from which a group of chairs is collected is equipped with a power device for automatically processing and automatically moving the chairs, the trolley is lifted up by the trolley lift device. Steering and running can now be performed smoothly without being affected by the wheels of the vehicle. This results in
Chair installation and collection work can be done efficiently. The lift device is realized by a simple structure in which a drive member presses pressed members on both sides in the lateral direction.

[Brief explanation of the drawing]

FIG. 1A is a plan view of a cart lift device of a power device of an automatic chair laying/retrieval machine according to an embodiment of the present invention.

FIG. 1B is a front view of main parts for explaining the operation of the truck lift device.

FIG. 2 is a side view of a cart of the automatic chair laying/recovering machine.

FIG. 3 is a plan view of the truck.

FIG. 4 is a front view of the truck.

FIG. 5 is a plan view of the power unit.

FIG. 6 is a side view of the power unit.

FIG. 7 is a side view of the main body of the gripping device of the same power device.

8 is a cross-sectional view taken along line AA in FIG. 7. FIG.

FIG. 9 is a side view illustrating the operation of the gripping device main body during installation.

FIG. 10 is a diagram illustrating an operation when recovering the gripping device main body.

FIG. 11 is a front view of a chair to be processed by the automatic chair laying/recovering machine.

[Explanation of symbols]

1 Chair 1b horizontal bar 10 Trolley 11 Base of the trolley 11b Pressed surface 12 Chair guide bar 20 Power plant 20a Power unit frame 22 Drive wheel 23 Steering wheel 26　Dolly lift device 26a, 26b Drive section 26c Drive surface

Claims (1)

[Claims] Claim 1: A plurality of trolleys on which a large number of chairs are collected and placed in a stacked state, and a vehicle that is detachably attached to any of these trolleys and that moves the chairs back and forth between the floor installation position and the collection position. In the automatic chair laying/retrieval machine, the chair gripping device automatically installs and retrieves the chair, and a power device includes a traveling drive wheel and a steering wheel, and the power device is mounted on the trolley. a bogie lift device for levitating the bogie when operating the traveling drive wheels in a state in which the bogie is operated, the bogie lift device comprising: a gap in which the base of the power unit enters and is attached to a lateral intermediate portion of the bogie base; is provided at the base of the power device, and drives on both sides are displaced laterally outward from the original position so as to push pressed members provided on the back surface of the base of the trolley on both sides of the gap in the lateral direction. a member and an actuator that respectively displaces the driving members laterally outwardly, the actuator displacing the driving member laterally outwardly on at least one of the mutually abutting portions of both the driving member and the pressed member. A trolley lift device for an automatic chair laying/recovering machine, characterized in that an inclined surface is formed that faces downward and laterally outward so that the pressed member is lifted when the member is displaced.