JP2903912B2 - In / out transfer device - Google Patents

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 automatic warehouse equipment, that is, a truck movable along a shelf, and a load between the shelf and a load supporting portion of the shelf. The present invention relates to a loading / unloading transport device provided with a lifting / lowering carriage on which a load transfer device for delivery is mounted.

[0002]

2. Description of the Related Art A stacker crane type as this type of loading and unloading transfer device is configured such that the load transfer device can be moved up and down from a lowermost load support portion of a shelf to an uppermost load support portion. There are known large-sized storage and retrieval transport devices and small-sized storage and retrieval transport devices provided for each of a plurality of upper and lower load supports on a shelf. In the former large-sized storage and retrieval transport device, usually only one storage and retrieval transport device is provided on two rows of left and right shelves, and the transport device is a traveling device laid on the floor surface. Since a large counterweight that moves up and down in the opposite direction in conjunction with the lifting carriage equipped with the load transfer device is supported by the guide rail for In the unloading transfer device, a plurality of transfer devices are required for the two rows of shelves on the left and right, and the number of transfer devices increases as a whole equipment, and the transfer devices other than the lowest stage are supported by the shelves. Therefore, it is necessary to reduce the weight and cost of each transport device. Therefore, providing a counterweight that equilibrates with the lifting carriage in such a transport device has been a major obstacle to weight reduction and cost reduction, and has been a problem.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and its features are indicated by reference numerals in the embodiments described later. The loading / unloading transfer device of the present invention is provided with a lifting carriage 7 on a carriage 5 movable along shelves 15a and 15b, and a load transfer device (running fork 6) is mounted on the lifting carriage 7.
And the like, which is equipped with a counterweight and a spring balancer, and as a counterweight, a front suspension chain 27a that suspends a central portion in the width direction of a front portion of the lifting carriage 7. A front counterweight 25a suspended at an end; and a rear counterweight 25b suspended at a free end of a rear suspension chain 27b that suspends a central portion in the width direction of a rear portion of the lifting carriage 7; A pair of left and right front spring balancers 34a, 34b respectively winding up two cable-like bodies 36a, 36b that suspend the front part of the lifting carriage 7 on both left and right sides of the front suspension chain 27a as the spring balancers; At the left and right sides of the rear suspension chain 27b, the rear part of the lifting carriage 7 is suspended. Gel two wick member 38a, a rear pair of spring balancer 35a winding the 38b to each other, in that 35b and is provided with the features.

[0004]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the accompanying drawings. In FIGS. A column-shaped frame 4 formed by connecting the ascending and descending guide posts 2a, 2b at the upper end with a connecting frame 3 is erected on a carriage 5,
A lifting carriage 7 on which a running fork 6 as a load transfer device is mounted is disposed between the lifting guide columns 2a and 2b.

A pair of left and right driving wheels 8a and 8b and a pair of right and left driven wheels 9a and 9b are distributed on the front and rear of the running fork 6 and mounted on the carriage 5 of the carriage 5 on the upper side of the carriage 5. Bearings 10a, 10b and 11
a and 11b. The pair of left and right drive wheels 8a and 8b are linked to each other by a transmission shaft 12, and one of the drive wheels 8a and the motor 13 mounted on the truck 5 are linked to each other by belt (or chain) transmission means. ing. The power transmission shaft 12 penetrates a portion near the lower end of one of the elevating guide columns 2a.

[0006] As shown in FIG.
Two rows of shelves 15 erected across the traveling path of the transport device 1
The driving guide rails 16a are arranged such that the drive wheels 8a, 8b and the driven wheels 9a, 9b are mounted on a pair of left and right traveling guide rails 16a, 16b which are installed at the same height on the inner traveling path side of the inner traveling passages 15a, 15b. , 16b. Thus, as shown in FIG. 1B, the carriage 5 has the traveling guide rails 16a,
Four L-shaped tipping prevention members 17 are connected in series so that the top surface of the tip approaches the lower side of 16b. Further, a pair of front and rear anti-sway roller units 19a and 19b including a pair of vertical shaft rollers 18 sandwiching the upper side of the one side guide rail 16a from the left and right sides are provided on the front and rear outer sides of the drive wheel 8a and the driven wheel 9a. It is arranged.

The lifting carriage 7 is mounted on a pair of front and rear support portions 21a and 21b rising from both front and rear ends of a horizontal bottom portion 20 supporting the running fork 6, and the lifting guide support column 2 is provided.
a and 2b are sandwiched from both left and right sides.
A pair of upper and lower horizontal anti-sway horizontal roller 23 for abutment against the inner side surfaces of a and 2b is supported by a shaft.
As shown in FIG. 1, when the lifting carriage 7 is at the lower limit level, a concave recess 24 into which the horizontal bottom portion 20 is loosely fitted is formed in the carriage 5. Therefore, both ends of the running fork 6 projecting left and right from the carriage 5 approach the upper side of the traveling guide rails 16a and 16b when the lifting carriage 7 is at the lower limit level.

As shown by a broken line in FIG. 1, counterweights 25 are provided in both lifting guide posts 2a and 2b, respectively.
a and 25b are loosely fitted so as to be able to move up and down. Thus, FIG.
As shown in FIG. 2, the front counterweight 25a and the rear counterweight 25b are provided with guide tooth wheels 26a, 2a.
A front suspension chain 27a and a rear suspension chain 27b, which are hung via the 6b, are connected to the upper ends of the pair of front and rear columns 21a, 21b of the lifting carriage 7 in a fishing bottle manner. , Guide tooth wheel 28a
The upper end of the column portion 21a on the opposite side of the lifting carriage 7 is also connected to the upper end of the column 21a by a chain 29 hung through 28c. As shown in FIG. 2, the front suspension chain 27a and the rear suspension chain 27b suspend the central portions in the width direction of the front support portion 21a and the rear support portion 21b of the lifting carriage 7, respectively.

An elevation drive motor 30 is mounted on the carriage 5 at a position close to the elevation guide column 2b, and a driving tooth wheel 31 and a guide tooth wheel 32 driven by the motor 30 are provided.
a, 32b, and the lower end of the rear counterweight 25b and the lifting carriage 7
And the lower end of the column 21b on the rear side is connected in a reverse fishing bottle manner. The guide gear wheels 26a and 28a are coaxially supported so as to be relatively rotatable.

Further, the connecting member 3 in the portal frame 4
The spring balancer unit 3 at each of the front and rear ends
4, 35 are attached. Each of the spring balancer units 34 and 35 includes a pair of left and right spring balancers 3 which are concentrically arranged as shown in FIG.
4a, 34b and 35a, 35b are provided. A pair of right and left spring balancers 34a, 34b is wound around a rope (such as a wire rope) 36a, 36b. The ropes (such as wire ropes) 38a, 38b, which are connected to the upper ends of the front support portions 21a of the lifting carriage 7 on the left and right sides of the lower chain 27a, and in which a pair of rear left and right spring balancers 35a, 35b are wound, are guided by pulleys 39.
a, 39b, the rear support 21b of the lifting carriage 7 on the left and right sides of the rear suspension chain 27b.
Is connected to the upper end of

As shown in FIG. 4, the transporting apparatus 1 for loading and unloading according to the present invention constructed as described above comprises a transporting apparatus 1 of each stage comprising two upper and lower loading supports on shelves 15a and 15b. 40
Are arranged in a plurality of upper and lower stages so as to take in and out of the vehicle. As shown in FIG. 2, a pair of left and right load supporting members 41a and 41b are installed on the load supporting portion 40 of each stage so that the running fork 6 in the advanced state can move up and down. ing.

When unloading the load W supported by the load supporting portion 40 of the shelf 15a or 15b, the transport device 1 having the unloading target load supporting portion 40 in the work area is run.
It is stopped at a position adjacent to the unloading target load support portion 40. At this time, the drive wheels 8a,
8b is driven to rotate. When the transport device 1 (the cart 5) stops at a predetermined position, the lifting 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 supports 41a and 41b in the unloading target load support portion 40. Drive. When the unloading target load support unit 40 is the lower load support unit 40 of the upper and lower two-stage load support units 40 that the transport apparatus 1 handles, the lifting carriage 7 is lowered to the lower limit level.

When driving the lifting carriage 7 up and down,
Chains 33, 2 connected endlessly through the counterweight 25b and the support 21b of the lifting carriage 7.
7b is rotated by the lifting drive motor 30. When the lifting carriage 7 is driven upward, the chain 29 is pulled by the counterweight 25b pulled down by the chain 33, and the column 21a of the lifting carriage 7 is also lifted at the same time.

The lifting carriage 7 driven up and down as described above has a pair of front and rear counterweights 25a and 25b.
In addition to the urging force of the spring balancers 34a and 35b, a total of four spring balancers 34a to 35b of a pair of front and rear spring balancer units 34 and 35 form cords 36a, 36b and 38.
The urging force for winding up the a and 38b acts on the support portions 21a and 21b before and after the lifting carriage 7 upward.
Therefore, when the biasing force acting on the lifting carriage 7 is configured to be substantially balanced with the weight of the lifting carriage 7, the counterweight 25 that increases the total weight of the transport device 1 is used.
The total weight of a and 25b can be reduced.

When the lifting carriage 7 stops at a predetermined level, the running fork 6 is advanced toward the unloading target load support section 40 as shown by an arrow in FIG. 1B, and then the lifting carriage 7 is moved by a predetermined amount. By raising the running fork 6, the running fork 6 is raised to the upper fixed level with respect to the load supports 41a and 41b, and the load W in the load support portion 40 is scooped. Then, by moving the running fork 6 back to the original position, the shelf 15a or 15b
Is completed.

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

[0017]

As described above, according to the loading / unloading transport device of the present invention, the front and rear portions of the lifting carriage are urged in the lifting direction by the counterweight and the spring balancer, respectively. Therefore, the weight of each counterweight, which greatly increases the weight, can be significantly reduced, and the overall weight of the transfer device can be reduced. In addition, when a spring balancer is used instead of the counterweight, a very large spring balancer is required, which not only leads to an increase in the size of the entire transfer device, but also applies a biasing force regardless of the position of the lifting carriage. The problem of the spring balancer, which is difficult to completely stabilize, can be reduced by the combination of the counterweights.

Further, according to the structure of the present invention, the widthwise central portions of the front and rear portions of the lifting carriage are urged in the lifting direction by the counterweight, and the left and right sides thereof are respectively urged upward by the spring balancer. From
While the lifting carriage is biased in the lifting direction by the two types of biasing means of the counterweight and the spring balancer, the front and rear parts of the lifting carriage are also biased in the lifting direction in a balanced manner in the left-right direction, It can be driven up and down smoothly. The counterweight, which becomes a heavy object, is placed at the center of the device in the width direction, and the spring balancer, which is relatively light compared to the counterweight, is arranged in parallel on both the left and right sides, so that the entire device is mounted in the width direction. Stability can also be ensured.

[Brief description of the drawings]

FIG. 1A is a side view of a state in which a front guide rail is omitted, and FIG. 1B is a longitudinal sectional front view showing a main part of a transfer device and a part of shelves on both right and left sides.

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

FIG. 3 is a side view illustrating a lifting drive unit of the lifting carriage.

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

[Explanation of symbols]

 2a lifting guide support 2b lifting guide support 5 trolley 6 running fork (load transfer device) 7 lifting carriage 8a drive wheel 8b drive wheel 9a driven wheel 9b driven wheel 13 driving motor 15a shelf 15b shelf 16a traveling guide rail 16b traveling Guide rail 25a Counter weight 25b Counter weight 27a Chain 27b Chain 29 Chain 30 Elevation drive motor 33 Carriage elevate drive chain 34a Spring balancer 34b Spring balancer 35a Spring balancer 35b Spring balancer 36a Spring balancer for spring balancer b Hoisting rope 38a Hoisting rope of spring balancer 38b Hoisting rope of spring balancer Body 40 shelf load support portion

Continuation of the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B65G 1/00-1/20 B66F 19/00

Claims (1)

(57) [Claims] 1. A loading / unloading transfer device having a lifting carriage provided on a carriage movable along a shelf, and a load transfer device mounted on the lifting carriage, comprising: a counterweight;
A spring balancer, and as the counterweight,
The free end of the front suspension chain that suspends the front center in the width direction
Front counterweight suspended on the
Rear suspension hanging the center of the rear of the carriage in the width direction
Rear counterweight suspended from the free end of the chain
And the front suspension chain as the spring balancer.
Hang the front of the lifting carriage on both left and right sides of the
A pair of left and right front parts that wind up two
Pulling balancer and both left and right sides of the rear suspension chain
At the rear of the lifting carriage
A pair of left and right spring bars to wind up the cable
A loading / unloading transfer device provided with a lancer .