JPS62290613A - Lifting carriage driver for warehouse crane - Google Patents

Abstract

PURPOSE:To reduce the occurrence of trouble attributable to sticking of foreign substances to a chain, to the utmost, by leading the chain into the inside of a lifting carriage guiding column at one side after making it pass through the inside of an upper frame. CONSTITUTION:Chains 11 and 12 led into a column 8a is guided to the inside of a lower frame 1 by way of the opening 16 formed over a range from a lower end of the column 8a to a top face of the lower frame 1. When driving tooth wheels 25 and 26 are rotated, these loop-form carriage sling chains 11 and 12, whose both ends 11a, 11b and 12a, 12b are engaged with a lifting carriage 9, are rotated, whereby the lifting carriage 9 moves up and down along these columns 8a and 8b. At this time, both these chains 11 and 12 are turn round in the state that a part continuing between both upper and lower frames 1 and 5 is thoroughly passed through from the upper end to the lower end of the column 8a.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an elevating carriage drive device for a running lane used for loading and unloading work on shelves in an automated warehouse. It is.

(Prior art and its problems) As a carriage drive device for light loads in this type of running lane, a chain whose both ends are locked to an elevating carriage is stretched in a loop along the carriage elevating path. There is known a carriage drive device in which the intermediate portion of the chain is engaged with a drive gear in a drive unit, and the carriage is raised and lowered by forward and reverse rotation of the chain.

In conventional carriage drive devices of this type, almost the entire length of the carriage hanging chain was exposed, so failures were likely to occur due to foreign matter adhering to the chain, and equipment installed beside the chain's path was Since it is necessary to keep the crane sufficiently away from the crane or to provide a protective cover therebetween, it has been difficult to construct the crane compactly. Furthermore, hang both the front and rear ends of the lifting carriage separately2.
The guide means for the book chain also had the disadvantage of being expensive due to the large number of parts.

(Means for Solving the Problems) The present invention proposes a carriage drive device capable of solving the above-mentioned conventional problems. The two chains to be suspended are guided through the upper frame and into the elevating carriage guide column on one side, and the two chains that pass through this column and reach the lower frame are connected to the drive installed on the lower frame. After the chain is wrapped around the drive gear wheel of the unit, it is guided upward along the one-sided support, and the free ends of both chains are locked to the lifting carriage at a position adjacent to the one-sided support. .

(Embodiment) An embodiment of the present invention will be described below based on the attached illustrative drawings. In FIG. 1, 1 is a lower frame,
It includes driving wheels 3 and driven wheels 4 that move on a lower guide rail 2 laid on the floor. Reference numeral 5 denotes an upper frame provided with a steady rest vertical shaft roller 7 that sandwiches an upper guide rail 6 installed on the ceiling side, and is connected to the lower frame 1 via a pair of front and rear vertical supports 8a, Bb. There is. Reference numeral 9 denotes an elevating carriage that is supported so as to be movable up and down between columns f3a and Qb, and is equipped with a load transfer means 10 such as a running fork.

As shown in FIGS. 2 to 5, the elevating carriage 9
One end lia, 12a of a carriage hanging chain (double chain) 11, 12 is secured to both front and rear ends of the carriage.

One chino 11 is turned downward by a guide gear wheel 13 pivotally supported inside one end of the upper frame 5, and then introduced into the support column 8a, and the other chino 12 is inserted into the other end of the upper frame 5. It is introduced into the support column 8a via a guide tooth ring 14 that is pivotally supported inside and a guide tooth ring 15 that is coaxially supported with the guide tooth ring 13.

Cheno 11 introduced into the pillar 8a. , 12 are guided into the lower frame 1 via an opening 16 formed between the lower end of the support column 8a and the upper surface of the lower frame 1, and are guided into the lower frame 1 through a coaxial guide gear 17 in the lower frame 1.
, 18, the chinos 11 and 12 are guided again above the lower frame 1 through an opening 19 provided on the upper surface of the lower frame 1 inside the support 8a, and the chinos 11 and 12 are guided to the free end along the support 8a. The parts 11b and 12b are the lifting and lowering carriage 9.
The intermediate portions of the chains 11 and 12 that make a U-turn within the lower frame 1 and which are locked in positions adjacent to the struts 8a of the lower frame 1 are connected to respective coaxial guide gear wheels that are pivotally supported within the lower frame 1. 20, 21, and 22.23, it is pulled out above the lower frame 1 on the outside of the support column 8a, and is spanned over the coaxial drive gear wheels 25, 26 in the drive unit 24 installed on the lower frame 1. ing.

The drive unit 24 includes a motor 27 with a reduction gear,
It is comprised of a pair of gears 29 and 30 that operatively connect the drive shaft 28 of the drive gears 25 and 26 to the output shaft 27a of the motor 27 with a reduction gear. Note that 31 is a traveling drive unit that drives the drive wheels 3. Also, the pillar 8a
, 8b are made of square pipe material as shown in Fig. 5, so the width of the space within the support column can be smaller even if it deviates back and forth from the center, compared to a case where it is made of round pipe material. do not have. Therefore, even when two chinos 11 and 12 are passed through the pillar 8a in parallel, the chinos are placed in a state where the chinos and the inner surface of the pillar do not come into sliding contact by utilizing the entire space inside the pillar 8a. It can be easily stretched.

The warehouse crane configured as described above can be made to 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 to be raised or lowered to the target loading/unloading work level, the motor 27 with a reduction gear in the drive unit 24 is operated, and the drive gears 25, 26 are driven through the gears 29, 30 and the drive shaft 28. Rotate. As a result, the loop-shaped carriage suspension chinos 11 and 12, whose ends 11a, llb and 12a, 12b are locked to the ascending carriage 9, rotate, and the ascending/descending carriage 9 moves to the support column 8.
It will move up and down along lines a and 9b. At this time, the chinos 11 and 12 rotate in such a state that the continuous portion between the upper and lower frames 1 and 5 completely penetrates the inside of the support column 8a from the upper end to the lower end.

Incidentally, the motor 27 with a reducer in the drive unit 24
is installed horizontally on the left and right, but it may also be installed horizontally on the front and back or vertically.
1.12 is the drive gear 25 in the drive unit 24.
It may be led out of the support column 8a through an opening formed in the side surface of the support column 8a at a position directly beside the support column 26.

(Operations and Effects of the Invention) According to the elevating carriage drive device for a warehouse crane according to the present invention, which can be implemented as described above, the elevator suspension is stretched in a loop shape with both ends locked to the elevating carriage. Approximately half of the chino is protected by passing through the pillar, so that failures caused by foreign matter adhering to the chino are greatly reduced. Furthermore, other equipment can be installed close to or in contact with the support, making it easy to make the entire crane compact.

Further, according to the configuration of the present invention, the free ends of the two chinos that hang the front and rear ends of the elevating carriage separately are locked to the elevating carriage at a position adjacent to a support on one side through which the chinos pass. This eliminates the need to guide one chino to the bottom of the opposite pillar within the lower frame.
Almost all of the guide gear wheels that individually guide the two chenos can be coaxially supported, and the cost of the chenos guiding means can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a side view of the entire crane, Fig. 2 is a perspective view showing the tensioned state of the carriage hanging chino, Fig. 3 is a partial longitudinal side view showing the main parts of the elevating carriage drive device, and Fig. 4 is a side view of the entire crane. FIG. 5 is a cross-sectional plan view of the same back side. 1... Lower frame, 2... Lower guide rail, 3
... Drive wheel, 8a, 8b... Strut, 9... Lifting carriage, 11.12... Carriage hanging chino, 13-Is, 17.18.20-23... Guide gear wheel, 16.19...Opening, 24...Drive unit, 25.26...Drive gear, 27...Motor with reduction gear, 29.30...Gear. Figure 1 I nephew

Claims (1)

[Claims] Hanging both the front and rear ends of the lifting carriage separately 2
The book chain is guided through the upper frame and into the elevating carriage guiding column on one side, and both chains that pass through this column and reach the lower frame are used to drive the drive unit installed on the lower frame. After passing it over the tooth ring,
A lifting carriage drive device for a warehouse crane, wherein the chain is guided upward along one of the pillars, and the free ends of both chains are locked to the lifting carriage at a position adjacent to the pillar on one side.