JPH06144514A - Carrier device for carrying-in and-out - Google Patents

Abstract

PURPOSE:To make the device counter weight-less or to reduce the weight of a counter weight by mounting a lifting carriage 7 on a car which can travel along a rack in a carrier device provided with a load transferring device (for example, a running fork) on the lifting carriage 7. CONSTITUTION:This carrier device is provided with both wires 36a, 36b, 38a, 38b connected to a lifting carriage 7, and spring balancers 34a-35b which winds up the respective wires in a direction of raising the carriage 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loading / unloading transfer device used in an automated warehouse facility, that is, a dolly movable along a shelf, and a load supporting section for loading and unloading the load. The present invention relates to a loading and unloading transfer device provided with an up-and-down carriage equipped with a load transfer device for delivery.

[0002]

2. Description of the Related Art As this type of loading / unloading transfer device, a stacker crane type in which the load transfer device is configured to be movable up and down from the lowermost load supporting portion of a shelf to the uppermost load supporting portion There is known a large-sized loading / unloading transporting device and a small loading / unloading transporting device arranged in each of a plurality of upper and lower load supporting portions of a shelf. In the former large-sized loading / unloading transfer device, usually only one loading / unloading transfer device is arranged on the left and right two-row shelves, and the transfer device is laid on the floor. Since it is supported by the guide rails for loading and unloading, it is not necessary to install a large counterweight that moves up and down in the opposite direction in conjunction with the lifting carriage that carries the load transfer device. In the delivery transport device, a plurality of transport devices are required for the left and right two-row shelves, and the number of transport devices increases as a whole of the equipment. Since it is necessary to travel on the traveling guide rail, it is necessary to reduce the weight and cost of each transport device. Therefore, it has been a problem to provide such a transfer device with a counterweight that is in equilibrium with the lifting carriage, which is a great obstacle in terms of weight reduction and cost reduction.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and its features are shown by the reference numerals of the embodiments described later. The transfer apparatus for loading and unloading according to the present invention is provided with an elevator carriage 7 on a carriage 5 movable along the shelves 15a and 15b, and a load transfer device (running fork 6) is mounted on the elevator carriage 7.
, Etc., in which a cord-shaped body 36a connected to the elevating carriage 7 and a spring balancer 34a that winds the cord-shaped body 36a in a direction of raising the carriage 7 are provided together. It is characterized by points.

According to the second aspect of the present invention, counterweights 25a and 25b which are moved up and down in the opposite direction in conjunction with the up-and-down carriage 7 are additionally provided. Further, in the device of the present invention according to claim 3, as the spring balancer, a front part spring balancer 34a for urging the front part of the elevating carriage 7 in the ascending direction and a rear part of the elevating carriage 7 for urging in the ascending direction. A rear spring balancer 35a is provided.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1 and FIG. 1. A portal frame 4 formed by connecting the lifting guide columns 2a, 2b of the above to each other by a connecting frame 3 at the upper end is erected on a carriage 5.
An elevating carriage 7 having a running fork 6 as a load transfer device is disposed between the elevating guide columns 2a and 2b.

A pair of left and right drive wheels 8a and 8b and a pair of left and right driven wheels 9a and 9b are distributed to the front and rear of the running fork 6 and attached to the upper side of the carriage 5 on the carriage 5 of the carrier device 1. Bearings 10a, 10b and 11
It is axially supported via a and 11b. The pair of left and right drive wheels 8a, 8b are interlockingly connected to each other by a transmission shaft 12, and one drive wheel 8a and a motor 13 mounted on the carriage 5 are interlockingly connected by a belt (or chain) transmission means 14. ing. The transmission shaft 12 passes through the vicinity of the lower end of one of the lifting guide columns 2a.

The carriage 5 is, as shown in FIG.
Two rows of shelves 15 erected upright across the traveling passage of the carrier 1.
The driving guide rails 16a are mounted so that the drive wheels 8a, 8b and the driven wheels 9a, 9b are mounted on the pair of left and right traveling guide rails 16a, 16b which are installed at the same height on the inner traveling passage side of the a, 15b. , 16b. Thus, as shown in FIG. 1B, the carriage 5 is mounted on the carriage 5 at a position directly below each of the wheels 8a to 9b.
Four L-shaped tipping prevention members 17 are continuously provided so that the upper surface of the tip approaches the lower side of 16b. Further, a pair of front and rear steadying roller units 19a and 19b having a pair of vertical shaft rollers 18 sandwiching the upper side portion of the traveling guide rail 16a on one side from both the left and right sides are provided outside the front and rear sides of the drive wheel 8a and the driven wheel 9a. It is arranged.

The elevating carriage 7 is mounted on a pair of front and rear supporting columns 21a and 21b rising from both front and rear ends of a horizontal bottom 20 which supports the running fork 6.
A pair of left and right horizontal shaft rollers 22 for holding the a and 2b from the left and right sides and a pair of upper and lower sides, and a lifting guide column 2
A pair of upper and lower horizontal shafts 23 for preventing the steady motion of the front and rear directions, which come into contact with the inner surfaces of a and 2b, are pivotally supported.
As shown in FIG. 1, when the elevating carriage 7 is at the lower limit level, a concave recess 24 into which the horizontal bottom 20 is loosely fitted is formed in the carriage 5. Therefore, both ends of the running fork 6 projecting to the left and right from the carriage 5 approach the upper sides of the traveling guide rails 16a and 16b when the lifting carriage 7 is at the lower limit level.

As shown by the broken lines in FIG. 1, counterweights 25 are provided in both the elevating guide columns 2a and 2b.
a and 25b are loosely fitted so that they can be moved up and down. Thus, FIG.
As shown in, each counterweight 25a, 25
b is connected to the upper ends of a pair of front and rear strut portions 21a, 21b of the lifting carriage 7 in a fishing bottle type by chains 27a, 27b suspended via guide teeth wheels 26a, 26b, and one counterweight 25b. Is a guide tooth ring 28
With the chain 29 hung via a to 28c, both the upper ends of the support columns 21a on the opposite side of the lifting carriage 7
It is connected like a fishing bottle. Further, a lifting drive motor 30 is mounted on the carriage 5 at a position close to the lifting guide column 2b, and is hung via a drive toothed wheel 31 and guide toothed wheels 32a, 32b driven by this motor 30. The chain 33 connects the lower end of one counterweight 25b and the lower end of the column portion 21b on the same side in the lifting carriage 7 in a reverse fishing bottle type. In addition, the guide teeth 26a, 28a
Are rotatably supported coaxially.

Further, the connecting member 3 in the portal frame 4
At the front and rear ends of the
4, 35 are attached. Each of these spring balancer units 34, 35 includes a pair of left and right spring balancers 34 that are concentrically arranged side by side as shown in FIG.
a, 34b and 35a, 35b, and a pair of left and right spring balancers 34a, 34b in the front spring balancer unit 34 on which cords (wire ropes, etc.) 36a, 36b are wound.
The front support part 21 of the lifting carriage 7 via a and 37b.
a pair of left and right spring balancers 35 in the rear spring balancer unit 35 connected to the upper end of a.
Cords (a wire rope, etc.) 3 around which a and 35b are wound
8a and 38b are connected to the upper ends of the rear support columns 21b of the lifting carriage 7 via guide pulleys 39a and 39b.

As shown in FIG. 4, the loading and unloading transporting apparatus 1 of the present invention having the above-described structure is such that the transporting apparatus 1 of each stage has two upper and lower load supporting portions on the shelves 15a and 15b. 40
Are arranged in a plurality of upper and lower stages so as to be in charge of loading and unloading. Thus, as shown in FIG. 2, a pair of left and right load support members 41a and 41b are installed on the load support portions 40 of the respective stages so that the running fork 6 in the advanced state can move up and down between them. ing.

When carrying out the load W supported by the load supporting unit 40 of the shelf 15a or 15b, the carrier device 1 having the load supporting unit 40 to be unloaded in the working area is run,
It is stopped at a position adjacent to the delivery target load supporting unit 40. At this time, the drive wheels 8a, 8a are driven by the traveling drive motor 13.
b is rotationally driven. Transport device 1 (truck 5) at a predetermined position
If is stopped, the elevating carriage 7 is moved up and down so that the running fork 6 is positioned at a lower fixed level with respect to the load supporting members 41a, 41b in the load supporting portion 40. The delivery target load supporting unit 40 has the lower load supporting unit 40 of the upper and lower two-level load supporting units 40 that the transfer device 1 takes charge of.
When, the elevating carriage 7 is lowered to the lower limit level.

When raising and lowering the raising and lowering carriage 7,
Chains 33, 2 endlessly connected to each other via the counterweight 25b and the column portion 21b of the lifting carriage 7.
7b is rotated by the lifting drive motor 30.
When the elevating carriage 7 is driven to rise, the chain 29 is pulled by the counterweight 25b pulled down by the chain 33, and the column portion 21a of the elevating carriage 7 is also lifted at the same time.

A pair of front and rear counterweights 25a and 25b are provided on the elevator carriage 7 which is driven up and down as described above.
In addition to the urging force of the cords, a total of four spring balancers 34a to 35b of the pair of front and rear spring balancer units 34 and 35 are used as cords 36a, 36b and 38.
The urging force that winds up the a and 38b acts upward on the column portions 21a and 21b before and after the up-and-down carriage 7.
Therefore, when the urging force acting on the lifting carriage 7 is configured to be approximately balanced with the weight of the lifting carriage 7, the counterweight 25 that increases the total weight of the transport device 1 is provided.
The total weight of a and 25b can be reduced, and in some cases, the number of spring balancers 34a to 35b can be increased, or the hoisting force of the cords of each spring balancer can be increased to increase the counterweights 25a and 25b.
It is also possible to omit b or reduce the number.

If the elevating carriage 7 is stopped at a predetermined level, the running fork 6 is moved to the side of the load supporting portion 40 to be delivered as shown by an arrow in FIG. 1B, and then the elevating carriage 7 is moved by a predetermined amount. The load is raised to raise the running fork 6 to a constant upper level with respect to the load support members 41a and 41b, and the load W in the load support portion 40 is scooped up. Then, by moving the running fork 6 backward to the original position, the shelf 15a or 15b is moved.
The discharge of the load W from is completed.

The load W carried out from the shelf can be carried to the loading / unloading area by the traveling of the carrying device 1. In the same manner as the unloading work of the load W at this handling place and the unloading work from the shelf, the load W loaded on the carrier device 1 at the handling place is carried into the load supporting portion 40 of the shelves 15a, 15b. The warehousing work and the like are performed in the reverse order of the unloading work from the shelves.

[0017]

As described above, according to the loading and unloading transport device of the present invention, the spring balancer for urging the raising and lowering carriage through the cord is provided. The weight of the entire counter is reduced by not using the counter weight, which greatly increases the weight, or by significantly reducing the weight of the counter weight used, which in turn reduces the torque required for traveling drive. As a result, the traveling drive means can be downsized and the cost can be reduced. Of course, the spring balancer can reduce the torque required to drive the elevator carriage up and down, thereby reducing the size and cost of the elevator drive means.

In particular, when the front spring balancer for urging the front part of the elevator carriage in the upward direction and the rear spring balancer for urging the rear part of the elevator carriage in the upward direction are provided as the spring balancers, The carriage can be biased upward with a good balance in the front and rear, and the number of spring balancers can be reasonably increased to effectively carry out weight reduction of the counterweight or the counterweight.

[Brief description of drawings]

FIG. 1 is a side view of a state in which a front guide rail for traveling is omitted, and FIG. 1B is a vertical cross-sectional front view showing a main part of a transfer device and a part of left and right shelves.

FIG. 2 is a cross-sectional plan view showing a main part of the transport device and a part of the left and right shelves.

FIG. 3 is a side view for explaining an elevating and lowering drive means for an elevating and lowering carriage.

FIG. 4 is a front view showing a part of the left and right shelves and upper and lower two-stage transport devices.

[Explanation of symbols]

 2a Elevating guide column 2b Elevating guide column 5 Bogie 6 Running fork (load transfer device) 7 Elevating carriage 8a Drive wheel 8b Drive wheel 9a Driven wheel 9b Driven wheel 13 Travel drive motor 15a Shelf 15b Shelf 16a Travel guide rail 16b Travel Guide rail 25a Counterweight 25b Counterweight 27a Chain 27b Chain 29 Chain 30 Motor for raising and lowering drive 33 Carriage raising and lowering drive chain 34a Spring balancer 34b Spring balancer 35a Spring balancer 35b Spring balancer 36a Winding spring balancer 36b Winding cord 38a Spring balancer winding cord 38b Spring balancer winding cord 40 Shelf load support

Claims (3)

[Claims] 1. In a loading and unloading transfer device having an elevator carriage provided on a carriage movable along a shelf, and a load transfer device mounted on the elevator carriage, a cord connected to the elevator carriage. An apparatus for carrying in and out, comprising a body and a spring balancer that winds up the cord in a direction of raising the carriage. 2. The loading / unloading conveyance device according to claim 1, further comprising a counterweight that is vertically moved in a reverse direction in conjunction with the lifting carriage. 3. The spring balancer is provided with a front spring balancer for urging the front part of the elevator carriage in the ascending direction and a rear spring balancer for urging the rear part of the elevator carriage in the ascending direction. The transportation apparatus for loading and unloading according to claim 1 or 2.