JPH0336738B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic transfer device that simultaneously transfers a large number of products and parts arranged on a pallet, or the pallet itself.

2. Description of the Related Art Conventionally, a transfer device equipped with a forklift mechanism has been used to load or unload products arranged on a pallet.

In particular, in order to automatically load products onto trucks and unload them all at once in a short time, the transfer mechanism must be large and must have a strong structure to ensure the strength of the mechanism itself. This is necessary, and it may also be necessary to renovate the truck.

In other words, various methods have been devised for conventional transfer devices, and in the case of a device that is equipped with a fork and a lift mechanism, and the fork is supported in a cantilever structure on the lift mechanism side, it is difficult to balance the load with the load. , install a balance weight similar to the load on the opposite side of the load or fork, make the lift mechanism itself larger and heavier, or make the fork itself a cantilever beam so it has a strong structure that can withstand the cantilever load. It is made in

Therefore, the cantilever type forklift mechanism having the above-described structure has disadvantages such as being large in size, requiring high equipment costs, slow transfer speed, and increasing consumption of driving energy.

There is also a mechanism that divides the fork into two and installs the fork on both sides of the cargo to distribute the load equally, but this not only has a complicated structure, but also divides the fork into two and distributes the load equally. This method is essentially a cantilever method, which has the same drawbacks as the previous embodiment.Moreover, in this method, if a cover is required on the truck side to protect the product, it is difficult to load the product. The problem is that the forklift mechanism on the side that is covered interferes with the cover and its support, complicating the work.

Furthermore, there are many cases in which a conveyor device is installed on the loading platform of a truck and is specially renovated to perform the transfer. There are some drawbacks, such as the high cost.

The present invention was made in order to solve the problems of the conventional method described above, and is capable of automatically transferring large-capacity and large-load articles in batches.
An automatic transfer device that can always operate the fork as a support beam at both ends under load conditions during transfer, thereby reducing the weight and size of the lift mechanism and increasing the efficiency of transfer work. The main purpose is to provide.

The automatic transfer device according to the present invention is an automatic transfer device comprising a rear lift and a front lift, and the rear lift includes a horizontally supported rear lift bar and a rear lift bar disposed below the rear lift bar. a rear column member that supports the rear lift bar in a vertically movable manner; a large number of forks protruding from the rear lift bar in parallel horizontally; and a rear support member disposed at the front end of the fork or on the loading platform side to guide and support the front end of the fork to the loading platform. and a rear rail member that guides the rear support member to advance and retreat in the longitudinal direction of the fork, and the front lift comprises:
a front lift bar that supports the protruding end sides of all forks of the rear lift from below; a front column member that is disposed below the front lift bar and supports the front lift bar so as to be able to rise and fall; and a front rail member that guides a support column member in the longitudinal direction of the fork, and the fork of the rear lift is supported by the front lift bar and is supported at both ends in the longitudinal direction of the fork. When the front end of the fork reaches the loading platform, it is guided and supported by the guide means and transferred to the loading platform.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings showing embodiments thereof. FIG. 1 is a perspective view showing a schematic configuration of an automatic transfer device according to the present invention,
2 is a side view of FIG. 1, showing the loading or unloading state of a truck or the like.

In the figure, reference numeral 1 denotes a truck, with the sliding door 3 of the loading platform 2 open, and the automatic transfer device of the present invention is positioned beside it.

4 is a conveyor, 5 is a pallet placed on the conveyor, 6 is a shipped product stacked on the pallet, and this product is in a state of being loaded onto the loading platform 2 of a truck.

The forks 7 are for lifting the products 6 all at the same time, and are placed on the loading platform 2 of the truck 1.
A plurality of lift bars 8 are fixed at regular intervals at right angles to the rear lift bar 8 which is arranged parallel to the rear lift bar 8.

Both ends of the rear lift bar 8 are connected to pillars 9a, which are disposed on the lower side of the rear lift bar 8, respectively.
9b is supported by elastic parts 10a and 10b,
It can be raised and lowered freely.

Also, the pillars 9 at both ends of the rear lift bar 8 are
a and 9b are mounted so that they can move forward and backward on guide rails 11a and 11b facing the loading platform 2, respectively.

The fork 7 is combined with a front lift bar 12 that supports the front end side of the fork 7 when the product 6 is lifted.

Similar to the rear lift bar 8 described above, the front lift bar 12 has both ends of pillars 13a and 13 disposed below the front lift bar 12, respectively.
It is supported by extendable parts 14a, 14b of b, and can be raised and lowered freely, and both end supports 13a, 13
b are guide rails 1 facing the loading platform 2, respectively;
It is mounted so that it can move forward and backward over 5a and 15b.

On the other hand, as shown in FIG. 3, a guide roller 16 such as a wheel is attached to the lower surface of the front end of each fork 7 fixed to the rear lift bar 8 so as to be able to appear and retract. When the product 6 is unloaded onto the loading platform 2 of the truck 1, it is used as a support roller to support the front part of the fork 7 in cooperation with the loading platform 2.

The guide roller 16 attached to the lower surface of the front end of the fork 7 is rotatably supported by a dogleg-shaped arm member 17, and the arm member 17 is attached by a spring 18 so as to be housed inside the fork 7 at all times. Forced.

The arm member 17 housed in the fork 7 is moved at the tip of the arm member 17 by sliding a wedge-shaped pressing member 20a via a rod 20 by a hydraulic cylinder 19 driven by a motor/oil pump. The guide roller 16 attached to the can be made to protrude.

FIG. 4 is an explanatory diagram showing the drive mechanism of the rear lift bar 8 and the front lift bar 12 described above, and what controls the vertical movement of the rear lift bar 8 is the one that supports both ends of the rear lift bar 8. Hydraulic cylinders 21a and 21b are built into two pillars 9a and 9b, and this hydraulic cylinder 21
a, 21b are controlled by being supplied with oil in an oil tank 24 via an oil pump 23 driven by a motor 22.

Further, the movement of the columns 9a and 9b supporting the rear lift bar 8 is performed using the guide rail 11.
a, 11b, and supports 9a, 9
A hydraulic motor 26 installed on either one of the chains 25a, 25b is switched and driven from the oil pump 23 via a switching valve 27. , chains 25a and 25b are driven synchronously by a synchronizing shaft 28.

On the other hand, the elevation control of the front lift bar 12 is as follows:
2 supporting both ends of the front lift bar 12
This is done by hydraulic cylinders 29a, 29b built into the book supports 13a, 13b. The hydraulic cylinders 29a, 29b are controlled by being supplied with oil in the oil tank 24 via an oil pump 31 driven by a motor 30. The oil driven by the motor 30 and supplied from the oil pump 31 is supplied via the switching valve 32 to the hydraulic motor 33 that moves the front lift bar 12 forward and backward, and the oil is supplied to the hydraulic motor 33 that moves the front lift bar 12 forward and backward. The driving force of the chain 34a is transmitted to the chain 34b via the synchronous shaft 35, and the columns 13a and 13b supporting the front lift bar 12 are moved forward and backward.

Next, the operation of loading and unloading operations by the automatic transfer device configured as described above will be explained.

First, when loading the products 6 onto the loading platform 2 of the truck 1, as a preparatory work, the products 6 are stacked on the pallet 5, moved on the conveyor 4 and sent to the loading position, and the loading platform 2 of the truck 1 is opened. and place it next to the loading position of the conveyor 4. At this time, the rear lift bar 8 is placed in the retracted position of the guide rails 11a, 11b.

Therefore, the height of the fork 7 of the rear lift bar 8 is adjusted to be the same height as the pallet 5 on the conveyor 4, and the fork 7 is inserted into the pallet 5 by moving it forward on the guide rails 11a and 11b. Next, the front lift bar 12 is raised to support the front part of the fork 7 from below, and the pallet 5 is lifted to a predetermined height position by the front lift bar 12 and the rear lift bar 8. In this state, the front lift bar 12 and the rear lift bar 8
and guide rails 15a, 15b and 11, respectively.
a and 11b until the pallet 5 reaches the floor of the loading platform 2 of the truck 1. Therefore, in order to place the pallet 5 stacked with products 6 on the floor of the loading platform 2, the front lift bar 12 and the rear lift bar 8 are simultaneously lowered. At this time, the hydraulic cylinder 19 is operated so as to cause the guide roller 16 on the lower surface of the tip of the fork 7 to protrude.

Then, the lift bar 12 and the rear lift bar 8 are simultaneously lowered until the guide roller 16 comes into contact with the floor of the loading platform 2 of the truck 1. When the guide roller 16 comes into contact with the floor of the loading platform 2, the rear lift bar 8 is lowered. is stopped, and the front lift bar 12 is lowered as it is.

Even in this state, the supporting pallet 5 of the product 6 is supported on both sides by the guide rollers 16 and the rear lift bar 8, and the rear lift bar 8 is moved forward until the pallet 5 is in a fixed position on the loading platform 2 of the truck 1. move it. In this state, guide roller 1
6 is stored inside the fork 7, and at the same time, the fork 7 moves from the upper plate part 5a of the pallet 5 to the lower plate part 5.
Lower the rear lift bar 8 until it falls between 1 and 2.b. Thereafter, by pulling out the forks 7 from the pallet 5 while retracting the rear lift bar 8, the products 6 are loaded onto the loading platform 2 of the truck 1 while being supported by the pallet 5.

The above explanation of loading operations is for loading products and parts together with pallets onto a loading platform such as a truck, but if you reverse the loading operation order described above, you can easily load the loaded products and parts. Can be unloaded in bulk.

Furthermore, although the above embodiments are directed to loading and unloading onto trucks, the automatic transfer device is widely applicable not only to trucks, but also to transfer work to a rack in a warehouse or another conveyor device, for example. can do.

Furthermore, in the device of the above embodiment, a guide roller is provided on the lower surface of the front end of the fork, but this may also be a sliding plate such as a sled, and if it is renovated as a special vehicle, wheels or rollers are installed on the loading platform side. They may be arranged consecutively.

As described above, the automatic transfer device according to the present invention is an automatic transfer device consisting of a rear lift and a front lift, and the rear lift includes a horizontally supported rear lift bar, and a horizontally supported rear lift bar. a rear strut member disposed on the lower side to support the rear lift bar in a vertically movable manner; a large number of forks protruding horizontally from the rear lift bar; guide means for guiding and supporting the front end of the vehicle toward the loading platform;
and a rear rail member that guides the rear column member to advance and retreat the forks in the longitudinal direction, and the front lift includes a front lift bar that supports the protruding end sides of all the forks of the rear lift from below. a front strut member disposed below the front lift bar to support the front lift bar in a vertically movable manner; and a front rail that guides the front strut member to advance and retreat in the longitudinal direction of the fork. The fork of the rear lift is supported by the front lift bar and advances in the longitudinal direction of the fork with both ends supported, and when the front end of the fork reaches the loading platform, the fork is guided and supported to the loading platform by the guide means. Since the rear lift and the front lift can work together to support the cart as a double-sided lift, the rear lift can also work together with the transport vehicle to support the cart during reloading. Therefore, the fork can be lightweight in relation to the load, eliminating the need for a load balancing mechanism, making it possible not only to simplify and downsize the soft mechanism, but also to speed up and smooth the transfer work.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a schematic configuration of the automatic transfer device according to the present invention, Fig. 2 is a side view of the main parts, Fig. 3 is an enlarged sectional view of the fork of the rear lift, and Fig. 4 is the transfer device. FIG. 2 is a configuration diagram showing a drive mechanism thereof. 4... Conveyor, 5... Pallet, 6... Product, 7... Fork, 8... Rear lift bar, 9
a, 9b... Support column, 11a, 11b... Guide rail, 12... Front lift bar, 13a, 13b
...Strut, 15a, 15b...Guide rail, 1
6...Guide roller.

Claims (1)

[Scope of Claims] 1. An automatic transfer device comprising a rear lift and a front lift, the rear lift comprising: a horizontally supported rear lift bar; A rear support member that supports a lift bar in a vertically movable manner; a number of forks that protrude horizontally from the rear lift bar in parallel; and a guide that is disposed at the front end of the fork or on the loading platform side to guide and support the front end of the fork to the loading platform. and a rear rail member that guides the rear column member to advance and retreat in the longitudinal direction of the fork, the front lift supporting the protruding end sides of all the forks of the rear lift from below. a front lift bar; a front support member disposed below the front lift bar to support the front lift bar in a vertically movable manner; and a front support member that guides the front support member to advance and retreat in the longitudinal direction of the fork. and a front rail member, the fork of the rear lift is supported by the front lift bar and advances in the longitudinal direction of the fork with both ends supported, and when the front end of the fork reaches the loading platform, the guide means moves the fork to the loading platform. An automatic transfer device characterized by being guided and supported by a transfer device.