JPH0659994B2 - Warehouse crane - Google Patents

Description

TECHNICAL FIELD The present invention relates to a movable warehouse crane that is used for loading and unloading operations for shelves in an automated warehouse.

(Prior art and its problems) In this type of warehouse crane, especially for light loads that do not require a counterweight that balances the lifting carriage, a carriage hanging chain with both ends locked to the lifting carriage is A warehouse crane, which is stretched in a loop along the ascending / descending path of an ascending / descending carriage, and in which the middle part of the carriage suspension chain is hung on the drive teeth of an ascending / descending drive unit, is disclosed in, for example, Japanese Examined Patent Publication No. It is known from the gazette and the like.

Thus, in this type of crane, as the carriage suspending chain, two chains for suspending the front and rear ends of the elevating carriage separately are provided, but the chains are led out from the lower frame of the crane to the elevating carriage. The two chain parts to be locked are stretched along the insides of the two columns that sandwich the elevating path of the elevating carriage, like the upper two chain parts on the side on which the elevating carriage is suspended. It had been.

In such a conventional configuration, one chain portion has to be hung substantially horizontally between both columns in the lower frame, which not only increases the total length of the chain,
There is a constraint that a space for passing the chain must be secured between both columns in the lower frame of the crane.

(Means for Solving Problems) In order to solve the above-mentioned conventional problems, the present invention provides
A carriage suspension chain whose both ends are locked to the elevator carriage is stretched in a loop along the elevator car's elevator path, and the middle part of the carriage suspension chain is hooked on the drive teeth of the elevator drive unit. It is a warehouse crane that is stretched, and as the carriage suspending chain, two chains for suspending the front and rear ends of the lifting carriage separately are provided, and the chains are continuously connected between the upper and lower ends of the carriage lifting path. The chain part to be used is one of the columns that are erected on the front and rear sides of the carriage lifting path.
The two chain parts that penetrate the inside of one of the columns and that are drawn out upward from the inside of the lower frame and locked to the lifting carriage are both aligned with the one column through which the chain penetrates. The present invention proposes a warehouse crane which is arranged in a vertical direction and is locked to one end of the lifting carriage adjacent to the one column.

(Embodiment) An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, 1 is a lower frame, and 5 is a lower frame.
Is an upper frame provided with a vertical shaft roller 7 for steadying that sandwiches an upper guide rail 6 installed on the ceiling side,
It is connected to the lower frame 1 through a pair of vertical carriage guide columns 8a, 8b. Both ends 1a, 1b of the lower frame 1 extend in the front-rear direction beyond the columns 8a, 8b,
A driving wheel 3 and a driven wheel 4 rolling on a lower guide rail 2 laid on the floor are distributed and axially supported by a and 1b. Reference numeral 9 denotes an elevator carriage which is supported so as to be able to ascend and descend between the columns 8a and 8b, and a load transfer means 10 such as a running fork is mounted.

As shown in FIGS. 2 to 5, the lifting carriage 9 is used.
Carriage suspension chains (double chain) 11, 12 have one ends 11a, 12a locked at the front and rear ends thereof, respectively. One chain 11 is turned downward by a guide toothed wheel 13 that is axially supported inside one end of the upper frame 5, and is then introduced into a column 8a near the drive wheel 3, and the other chain 12 is used. Is passed through the guide toothed wheel 14 axially supported inside the other end of the upper frame 5 and the guide toothed wheel 15 supported coaxially with the guide toothed wheel 13 and the pillar 8a.
Has been introduced within.

The chains 11 and 12 introduced into the column 8a are guided into the lower frame 1 through the opening 16 formed in the upper surface of the lower frame 1 from the lower end position of the column 8a to the lower frame one end 1a. Then, via the coaxial guide teeth 17 and 18 in the lower frame 1, it is guided again above the lower frame 1 through the opening 19 provided on the upper surface of the lower frame 1 inside the support column 8a. The chains 11 and 12 are arranged so that the free ends 11 are aligned with the columns 8a.
b and 12b are locked to the advancing and lowering carriage 9 at positions adjacent to the column 8a. The middle portions of the chains 11 and 12 that make U-turns in the lower frame 1 are coaxial guide gears 20 axially supported in the lower frame 1, respectively.
21 and 22 and 23 pull out above the lower frame one end 1a from the opening 16 at an intermediate position between the drive wheel 3 and the column 8a, and move up and down the drive unit 24.
It is hung around the drive toothed wheels 25 and 26 on the same axis.

The elevating drive unit 24 is mounted on the lower frame one end portion 1a so as to be located above the drive wheels 3 and adjacent to the support column 8a, and has a speed reducer motor 27 and the drive teeth. It is composed of a pair of gears 29 and 30 for connecting the drive shaft 28 of the wheels 25 and 26 to the output shaft 27a of the motor 27 with a speed reducer.

The traveling drive unit 31 that drives the drive wheels 3 located below the elevating drive unit 24 is attached to the lateral outside of the lower frame one end 1a laterally of the drive wheels 3 and is viewed in a side view. Where the lifting drive unit 2
4 and at least a part of them overlap.

It should be noted that the control box 32 and the like can be installed on the other end 1b of the lower frame so as to be close to the support column 8b as shown in the figure.

The warehouse crane configured as described above can travel along the lower guide rail 2 by rotating the drive wheels 3 by the travel drive unit 31. When the elevating carriage 9 is moved up and down to the desired loading and unloading work level, the motor 27 with a reducer in the elevating drive unit 24 is operated to drive the gears 29, 30.
The drive teeth 25 and 26 are rotated via the drive shaft 28. As a result, both ends 11a, 11b and 12a, 1
The loop-shaped carriage suspending chains 11 and 12 in which 2b is locked to the lift carriage 9 rotate, and the lift carriage 9 moves up and down along the columns 8a and 8b. At this time, the chains 11 and 12 are attached to the upper and lower frames 1,
The portion continuous between 5 rotates while completely penetrating the inside of the column 8a from the upper end to the lower end.

Although the motor 27 with a speed reducer in the lifting drive unit 24 is installed horizontally in the horizontal direction, it may be installed horizontally in the front-rear direction or vertically.

(Operation and Effect of the Invention) According to the warehouse crane of the present invention that can be implemented as described above, the following operation and effects can be obtained. That is, the portions of the two carriage suspension chains that suspend the front and rear ends of the lift carriage separately from each other and are pulled out from the inside of the lower frame and are locked to the lift carriage.
In both cases, the carriage suspension chain is arranged along the pillar (in the embodiment, the pillar 8a) penetrating the inside thereof, and is locked at one end of the elevating carriage adjacent to the pillar. The two chain parts, which are led out upward from inside the lower frame and are locked to the lifting carriage, are distributed to the front and rear so as to be along the pair of front and rear columns located on the front and rear sides of the lifting carriage, respectively. Compared with the conventional structure in which the front and rear ends of the carriage are locked, the length of one chain can be shortened, and almost all of the guide teeth for guiding the two chains separately are coaxially supported. Therefore, the cost can be reduced. Further, it is not necessary to secure a space for passing the chain between both columns in the lower frame of the crane, which facilitates utilization in the lower frame of the crane.

[Brief description of drawings]

FIG. 1 is a side view of the entire crane, FIG. 2 is a perspective view showing a state in which a carriage hanging chain is stretched, FIG. 3 is a partially longitudinal side view showing a main part of the crane, and FIG. 4 is a rear view of the same. Fifth
The figure is a cross-sectional plan view of the same. 1 ... lower frame, 1a, 1b ... lower frame end, 2 ... lower guide rail, 3 ... driving wheel, 8a,
8b ... posts, 9 ... lifting carriage, 11,12 ...
Carriage hanging chain, 13-15, 17, 18,
20 to 23 ... Guide tooth ring, 16, 19 ... Opening portion, 24
...... Lifting drive unit, 25, 26 ...... Drive tooth wheel, 2
7: Motor with reduction gear, 29, 30: Gear, 31
...... Traveling drive unit, 32 …… Control box.

Claims (1)

[Claims] 1. A carriage suspension chain having both ends locked to an elevator carriage is stretched in a loop shape along an elevator passage of the elevator carriage, and an intermediate portion of the carriage suspension chain is connected to an elevator drive unit. In a warehouse crane that is hung on a drive tooth wheel, two chains for suspending the front and rear ends of the lift carriage separately are provided as the carriage suspension chains.
A chain portion that is continuous between the upper and lower ends of the carriage elevating path is penetrated through one of the pillars that are erected at the front and rear ends of the carriage elevating path, and is drawn upward from the lower frame. Both of the two chain portions locked to the lifting carriage are arranged along the one pillar through which the chain penetrates, and are engaged with one end of the lifting carriage adjacent to the one pillar. A warehouse crane that is stopped.