JPS6382231A - Collective transferring device equipped with car height holding mechanism - Google Patents

Abstract

PURPOSE:To facilitate the perfect automation of a transfer device by installing a car height holding mechanism which stop-controls the elevation of a car supporting means by a driving means, by a detecting means. CONSTITUTION:A truck is allowed to stop at the prescribed position on a car height holding mechanism 5, and an under jack 1 is transported onto the undersurface of a chassis at the center part in the longitudinal direction of a load carrying platform by a screw jack 2, and a hydraulic pump 4 is driven by inputting a radio signal into a control circuit 6 by a radio pushing button, and the under jack 1 is raised. When a limit switch 7 built in the top edge part of the under jack 1 contacts the chassis of the truck, the switch 7 is set in the set state, and the elevation of the under jack 1 through the control circuit 6 is automatically suspended.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a transfer device that simultaneously loads or unloads cargo loaded on a pallet onto a vehicle, and particularly relates to a transfer device that supports the vehicle from below. , relates to a vehicle height holding mechanism that maintains a loading platform at a constant height.

(Prior Art) Conventionally, in this type of device, when a truck driver, for example, operates the device, he/she gets out of the truck, manually presses a push button, and operates the device while visually following the rise of the jack. However, when the jack comes into contact with the vehicle chassis, it stops rising. This contact confirmation is performed visually.

(Problems to be Solved by the Invention) In the conventional method, not only does the push button operation increase the troublesomeness, but also it is difficult to finely adjust the stroke of the jack by visual operation. Variations in the height of the loading platform or variations in the sinking of the loading platform when a load is deposited on the loading platform occur, making it difficult to completely automate the transfer device.

SUMMARY OF THE INVENTION An object of the present invention is to provide a batch transfer device equipped with a novel vehicle height maintenance Fal;i in order to solve the above-mentioned problems and facilitate complete automation of the transfer device.

(Means for Solving Problems According to the Invention) The present invention provides the above-mentioned transfer device, which includes a plurality of vehicle support means for supporting the vehicle from below and a drive means for driving the vehicle support means. The present invention is characterized in that it includes a means for detecting approach to the lower side of the vehicle, and a vehicle height holding mechanism for controlling the raising of the vehicle supporting means by the driving means to be stopped by the detecting means.

As the approach detection means, a limit switch, a proximity switch, a photoelectric distance detection sensor, an ultrasonic type, a magnetic type, and other various types of proximity detection means are used.

In order to maintain the sinking amount of the loading platform at a constant height when loading cargo into a vehicle, this type of device has two types of vehicle sizes (especially the structure of the chassis frame under the loading platform) or depending on the load amount. However, according to the present invention, this is automated.

The approach detection means can be disposed in a groove in a part of the vehicle support means and can function safely without directly hitting the lower part of the chassis.
A limit switch is preferable in terms of reliability of operation due to dirt and other points of contact. According to the limit switch, after the limit hits the bottom of the chassis, it can be stopped after rising a predetermined stroke.

It is preferable in that sense as well.

As the vehicle supporting means, for example, a screw jack, a hydraulic jack using a hydraulic cylinder, a rack driving jack using a rack, etc. can be considered.

Possible driving means include a motor that drives a screw jack or rack, a hydraulic pump that drives a hydraulic cylinder, and the like.

Note that it is preferable to shift the position of the vehicle support means in the longitudinal direction of the vehicle depending on the size of the vehicle, especially the length of the vehicle, and especially the position of the chassis frame, so that it always hits near the center of the loading platform. This allows the vehicle to be supported near the center of gravity of the vehicle.

Also, the number of adaptive vehicle support means is increased as appropriate depending on the amount of cargo load. This makes it possible to load a large load of, for example, 10 tons or more.

(Example) The present invention will be described below with reference to drawings showing examples. FIG. 1 shows a plan view of the vehicle height holding mechanism 5 with the cover removed.

Reference numeral 6 denotes a control circuit for controlling the operation and stopping of the hydraulic pump 4. This control circuit 6 has an automatic setting configuration in which the operating switch of the hydraulic pump is turned on by wireless operation, and the jack is thereby raised.

It should be noted that, proceeding further, when the vehicle reaches a predetermined fI of the vehicle height holding mechanism.
It is also possible to adopt a completely automatic set structure in which the detection means detects this when B:; is stopped at ', and this detection signal is manually input to the control circuit to operate the hydraulic pump.

Reference numeral 1 denotes an underjack that constitutes a vehicle support means composed of a hydraulic cylinder; 2 a screw jack that moves this underjack in the longitudinal direction of the loading platform according to the length of the vehicle;
3 indicates a large-load sub-under jack used when the load is 8 tons or more, and 4 indicates a hydraulic pump that operates these devices.

A limit switch 7 is built in a groove 8 formed at the upper end of the underjack 1. The ON signal of this limit switch enters the control circuit 6 and stops the operation of the hydraulic pump 4.

FIG. 2 shows a partial plan view of the transfer device.

Reference numeral 51 in FIG. 3 is an automatic control device that automatically operates this transfer device. The lifting means of this transfer device consists of a rear lift 21 and a front lift 22.

The rear lift 21 is provided by a screw jack 23.

The front lift 22 is provided by a screw jack 24.

They are raised and lowered respectively. Reference numerals 25 and 26 are screw jack raising and lowering motors, which raise and lower the fork struts 34 and 35 via shafts 47 and 48. The rear lift 21 moves on a guide rail 29 via wheels 28 attached to a base 27, and the front lift 22 moves on a guide rail 32 via wheels 31 attached to a base 30. This is done by running. A and B are travel m deceleration motors of the rear lift 21 and front lift 22, respectively. The power from these motors A and B is applied to each wheel 28.
．． 31.

33 is a fork constituting the support means. In FIG. 2, a plurality of fork supports 34 of the rear lift 21 are horizontally disposed at regular intervals in a perpendicular direction. The lower surface of the fork 33 is supported by a pin 50 by a bracket 49 fixed to the fork support 34 (see FIG. 3). With this fork support structure, for example, an air cylinder 52 is provided as shown by the dotted line, and it is possible to achieve horizontal adjustment of the fork by pushing the upper surface of the fork (the fork end is not fixed to the fork support 34). .

The fork 33 is combined with a front fork strut 35 of the front lift 22 that supports the front of the fork from below when the product is lifted.

A rotary roller 3B is attached to the lower surface of the front end of the fork 33 so as to be freely protrusive and retractable by an air cylinder 46, and when the pallet is lowered onto the loading platform of a vehicle, the rotating roller 3B is protruded and used as a support to support the front part of the fork 33 together with the loading platform. Used as a roller.

In FIG. 3, 37 and 38 indicate trinocular photoelectric sensors for detecting the cargo platform. 37 is attached to the side surface of the tip of the fork 33, and 38 is attached to the lower surface of the center of the fork 33.

(Operation of the embodiment) In FIG. 3, products 40 on a pallet 39 that has been placed on a self-propelled traverser 41 and moved in front of a transfer device 42
The entire pallet is transferred to the fork 33 of the support means by the pusher 43 of the self-propelled traverser 41.

Insert into the front half of the fork. This insert palette is
It is moved to the rear half of the fork 33 by the stopper 70 of the retracting device 71 and placed in a predetermined position. This retraction device 71
is a rod 7 having an inclined surface 72a at the tip as shown in FIG.
2, when the rod 72 moves to the left in the figure, the stopper 70 rotates about the shaft 73 and protrudes to engage the bottom of the pallet and hold it on the upper surface of the rod 72. By retracting the rail 74, the pallet is carried by the stopper 70. As a result, as shown in FIG. 4, the pallet 39 is inserted into the fork 33 with a space maintained therebetween.

In FIG. 1, the truck is stopped at a predetermined position on the vehicle height holding mechanism 5, and the underjack 1 is moved to the bottom surface of the chassis in the longitudinal center of the loading platform by the screw jack 2, and controlled by the wireless push button. A wireless signal is input to the circuit 6, the hydraulic pump 4 is driven, and the underjack 1 is raised. At this time, when the limit switch 7 built into the tip of the underjack 1 hits the chassis of the truck, the switch is set and the lifting of the underjack 1 is stopped via the control circuit 6.

If the cargo exceeds 8 tons, switch the wireless switch to amplifier jack 1 + sub-under jack 3, operate both at the same time using the wireless push button, and apply sub-under jack 3 along with under jack 1 from the bottom of the outer loading platform. let

Next, in FIG. 4, the front lift 22 and the rear lift) 2+
At the same time, the jacks 24 and 23 raise the roller by 100 mm, and the two-rotation roller 3B comes out.

The front lift 22 and the rear lift 1-
21 and guide rails 32 and 2 by deceleration motors B and A.
9 After moving the two cars forward, the two lifts simultaneously ascended to the upper end (200m+n higher than the truck bed).

Further move forward to the L section of the truck bed (until both lifts are stopped by the limit switch).

Next, in FIG. 5, front lift 22. ! : When the rear lift 21 and the rear lift 21 are lowered at the same time, and the photoelectric sensor 37 built into the side surface of the tip of the fork 33 detects the truck bed 45, the lowering of the rear lift 21 is stopped and the front lift 22 is lowered.
only to reach the lower end. This makes the fulcrum the rear lift 2
1, due to the deflection of the fork 33 supported by the rear lift 21, the rotary roller 3G protruding from the lower surface of the fork tip hits the truck bed 45, providing joint support with the truck bed, Keep the beam in position.

At this time, when the front lift 22 is lowered below the lower surface of the pallet, the timer operates, and the rear lift 21 moves forward to carry the product to the center of the truck 44 (FIG. 6).

The forward movement of the rear lift 2I is stopped by activation of the forward limit switch. At this time, the rear lift 21 descends until the photoelectric sensor 38 attached to the central lower surface of the fork 33 detects the loading platform 45.

Note that the horizontal adjustment of the fork inclination is not limited to this, and can also be performed in parallel with, for example, the fork moving forward.

By confirming the forward limit switch of the rear lift 21, the rotation of the fork lower surface 3G is released.

At this time, the front end of the fork 33 is tilted by the release stroke of the two-rotation roller 3G. The rear lift 21 is automatically lowered until the photoelectric sensor 38 in the center of the fork detects this inclination and the loading platform 45 of the truck.

The fork 33 is controlled parallel to the center of the pallet height. Thereafter, the fork 33 is retreated to a predetermined position (until the rear lift 21 is about 300 nm away from the truck bed). Next, the rear lift 21 and the front lift 22 simultaneously return to the rear end and return to their original positions, completing the loading operation.

Note that the horizontal adjustment of the fork is not limited to the case described above, and can be performed as many times as appropriate.

Furthermore, by reversing the order of the loading operations described above, the loaded products can be unloaded all at once.

(Effects of the Invention) The vehicle height holding mechanism of the present invention relieves the trouble of manual operation by visual inspection, and together with the automation of raising and lowering the forks, facilitates the complete automation of the transfer device. .

According to the present invention, the height of the loading platform is set at the reference position 2 of the fork.
Since the control range when lowering the fork (when loading) can be limited to a certain distance, it is possible to improve control accuracy and speed up the rise and fall speed, thereby reducing the possibility of two-person work errors. A number of effects can be obtained, such as avoiding this and shortening the time required for one task.

[Brief explanation of the drawing]

, Fig. 1 is a plan view of the vehicle height holding mechanism with the cover removed, Fig. 2 is a partial plan view of the transfer device of the second embodiment, and Fig. 3 is a plan view of the vehicle height holding mechanism with the cover removed.
6 to 6 are diagrams showing the operation of the transfer device, and FIG. 7 is a partial side view of the retracting device. 1...under jack. 2... Screwjack. 3...Sub-under jack. 4...Hydraulic pump. 6...Control circuit. 7...Limit switch.

Claims (1)

[Scope of Claims] A transfer system consisting of a support means, an elevating means, and an advancing/retracting means, in which a plurality of pallets are collectively supported by the supporting means, and the supporting means is moved up and down, advanced and retreated by the elevating means and the advancing/retracting means, and the cargo is transferred. The device includes a plurality of vehicle support means for supporting the vehicle from below and a drive means for driving the vehicle support means, the vehicle support means is provided with means for detecting approach to the lower side of the vehicle, and the vehicle is detected by the drive means. A batch transfer device characterized by comprising a vehicle height holding mechanism that controls the lifting of the support means to stop by the detection means.