JPH10114405A - Drive mechanism of running carriage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a running carriage to suddenly take off or accelerate so as to attain efficient running and the small sizing of a motor. SOLUTION: A front side wheel 4 and a rear side wheel 5 are arranged on the front and rear in the running direction at a specified interval, and these front and rear side wheels 4, 5 are connected together through a drive transmission mechanism such as belt. In addition to arrange the wheels 4, 6 at a specified interval on the front and rear in the running direction, intermediate pulleys 7, 8 are arranged between the front and rear wheels 4, 5, and the front side wheel 4 and the intermediate pulley 7, the intermediate pulley 8 and the rear side wheel 5 are respectively connected tougher through respectively separated drive transmission mechanisms 10, 12. Further, the two intermediate pulleys 7, 8 are connected together through a uniform coupling 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive mechanism for a traveling vehicle provided with a device capable of quickly and reliably taking out articles placed on a shelf, for example, in an automated warehouse or the like, and is arranged at a predetermined interval. The driven wheels are driven together.

[0002]

2. Description of the Related Art Generally, a traveling cart equipped with an article take-out device in an automated warehouse or the like is configured to be able to travel on rails, and one of wheels provided before and after in a traveling direction is used as a driving wheel. The other is a driven wheel.

[0003]

Therefore, when the conventional traveling vehicle is driven, if the vehicle is suddenly started or accelerated, the contact pressure of the driving wheel located on the forward side in the traveling direction with respect to the rail is reduced. In some cases, the transmission rate of thrust is reduced, and a desired thrust cannot be obtained.

[0004]

SUMMARY OF THE INVENTION The present invention has been improved and eliminated in view of the above-mentioned conventional problems. The present invention enables rapid start and rapid acceleration to be performed, thereby improving the efficiency of traveling and miniaturization of a motor. If possible, increase capacity.

[0005] In order to solve the above-mentioned problems, the present invention employs a vehicle according to a first aspect of the present invention, wherein wheels are arranged at predetermined intervals before and after in a traveling direction on a traveling vehicle installed on a rail. The front and rear wheels are connected by a drive transmission mechanism.

The means of claim 2 adopted by the present invention is as follows:
In a traveling vehicle installed so as to be able to travel on rails, wheels are arranged at predetermined intervals before and after in the traveling direction, and an intermediate pulley is arranged between front and rear wheels, and a front wheel, an intermediate pulley and an intermediate pulley are arranged. A drive mechanism for a traveling vehicle, wherein the pulley and the rear wheel are connected by separate drive transmission mechanisms.

Further, according to a third aspect of the present invention, there is provided a traveling bogie provided so as to be able to travel on a rail, wherein the wheels are arranged at predetermined intervals before and after in the traveling direction, and the distance between the front and rear wheels is increased. In addition, two intermediate pulleys are installed side by side in the direction perpendicular to the traveling direction, and the two intermediate pulleys are connected to each other by a constant velocity joint, and the front wheel and one intermediate pulley and the other intermediate pulley and the rear wheel are connected to each other. A drive mechanism for a traveling vehicle, wherein the drive mechanisms are connected by separate drive transmission mechanisms.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below with reference to the embodiments of the invention shown in the drawings.

1 to 4 show a driving mechanism of a traveling vehicle 1 according to an embodiment of the present invention. FIG. 1A is a plan view of the traveling vehicle 1 and FIG. ) Is traveling cart 1
2A is a left side view of the traveling vehicle 1, FIG. 2B is a cross-sectional view taken along the line AA in FIG. 1B, and FIG. FIG. 4 is a sectional view taken along line BB of FIG. As shown in the figure, the traveling carriage 1 is a carriage frame 3 framed with a predetermined width.
, And wheels 4 and 5 are pivotally mounted on the front and rear. And the rails 6 laid on the floor of the automated warehouse
The front and rear wheels 4 and 5 are mounted thereon, and the traveling carriage 1 is suspended on a rail 6 so as to be able to move forward and backward.

[0010] Pulleys 7 and 8 are provided on both sides of the intermediate portion of the traveling vehicle 1, and both pulleys 7 and 8 are provided.
Are connected by a constant velocity joint 2 shown in FIGS. The pulley 7 is connected to a pulley 9 attached to a wheel shaft 4 a of the front wheel 4 via a drive transmission belt 10. On the other hand, the pulley 8 is connected to a pulley 11 attached to a wheel shaft 5 a of the rear wheel 5 via a drive transmission belt 12. Further, a motor 14 for driving the running is mounted via a worm gear mechanism 13 on the side surface of the rear wheel shaft 5a opposite to the side surface of the bogie on which the pulley 11 is mounted.

The constant velocity joint 2 shown in FIGS.
Connects the shafts 7 a and 8 a of the pulleys 7 and 8 via a yoke 15. By using the constant velocity joint 2 in this manner, even when the axis of the pulleys 7 and 8 does not coincide, the rotational driving force of the motor 14 can be transmitted accurately. Therefore, even if the belts 10 and 12 disposed on both side surfaces of the bogie frame 3 are not disposed in parallel with each other, the driving force of the motor 14 can be transmitted accurately by the operation of the constant velocity joint 2, and The mechanism is easy to assemble.

In order to prevent the wheels 4 and 5 from derailing, the traveling vehicle 1 has a derailment preventing plate 1 as shown in FIG.
6 and 17 are attached. This derailment prevention plate 16
And 17 are arranged opposite to each other so as to correspond to the jaw portion below the head of the rail 6, and the distance between the two prevention plates 16 and 17 is smaller than the width of the rail head. Therefore, as long as the derailment prevention plates 16 and 17 are not damaged, the wheels 4 and 5 at the front and rear portions of the traveling vehicle 1 do not derail from the rail 6.

In the drive mechanism configured as described above,
The rotational driving force of the motor 14 is transmitted to the wheel shaft 5a via the worm gear mechanism 13 to drive the wheels 5 to rotate. The rotational driving force of the motor 14 is transmitted to the intermediate pulley 8 via the pulley 11 and the belt 12 of the wheel shaft 5a, and transmitted to the intermediate pulley 7 located on the opposite side surface via the constant velocity joint 2. Is done. Then, the rotational driving force is transmitted to the wheel shaft 4 a via the belt 10 and the pulley 9, and the rotational driving force is transmitted to the front wheel 4. That is, the drive mechanism of the traveling vehicle 1 is of a type in which both the front wheels 4 and the rear wheels 5 are driven.

Therefore, with the traveling vehicle 1 having such a driving mechanism, in an automated warehouse or the like, the contact pressure of the wheels located on the front side in the traveling direction with respect to the rail 6 due to sudden start or rapid acceleration is increased. Even if it is lowered, it is possible to travel reliably using the remaining rear wheels. That is, since both the front wheel 4 and the rear wheel 5 are drive wheels, even if the contact pressure of one of the wheels on the rail 6 decreases, the traveling vehicle 1 can be driven by the remaining drive wheels. It is possible. Therefore, it is possible to move at high speed in the warehouse, greatly shorten the time required for taking out articles, and perform efficient work,
The size of the motor 14 can be reduced.

A drive transmission system in which pulleys 7 and 8 and a constant velocity joint 2 connecting the pulleys 7 and 8 are arranged between the front and rear wheels 4 and 5 and connected by belts 10 and 12, Even when the distance between the rear wheel 4 and the rear wheel 5 is long, transmission of the driving force is easy.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in a schematic perspective view showing the entirety of FIG. 5 and a schematic side view showing the middle of the process of taking out an article W in FIG. Used in automated warehouses. In this embodiment, two front and rear masts 18 and 19 are attached to the upper surface of the bogie frame 3 by bolt connection or the like, and an article take-out device 20 and a pickup device 21 are further mounted between the masts 18 and 19. I have.

The article take-out device 20 includes, for example, a retractable roller conveyor 22 that can be bent in a U-shape.
And a belt conveyor 23 that is provided continuously with the belt conveyor 23 and is inclined so as to become lower toward the front end side. Further, the pickup device 21 has first and second arms 24 and 25 which are extendable and contractible. At the distal end side of the second arm 25, a holding means 26 that can move up and down with respect to the article W is attached. A tilt arm 27 is slidably attached to the lower surface of the arm 25.

The upper sides of the masts 18 and 19 are connected by a frame 28.
It is engaged and mounted on the ceiling rail 29 via a derailment prevention mechanism 30. The derailment prevention mechanism 30 is, for example, a ceiling rail 2
9 has both sides sandwiched by rollers (not shown). In FIG. 5, reference numeral 31 denotes the rail 6 of the traveling vehicle 1.
Conveyor for unloading articles, which is attached to
This is a stock yard for storing a few articles W taken out by 3.

Next, an operation of taking out the article W by the embodiment apparatus configured as described above will be described. First, the above-described driving mechanism of the traveling vehicle 1 travels on the rail 6 at a high speed to a place where the target article W is stored. Then, when reaching the place where the articles W are stacked, the traveling vehicle 1 stops here and stands by.

Thereafter, the unloading device 20 and the pick-up device 21 rise to a height corresponding to the article W positioned at the highest position, and at the same time, the unloading device 20 and the pick-up device 21
Is made to correspond to the article W. Next, the arms 24 and 25 and the roller conveyor 22 perform a protruding operation. Subsequently, first, the pressing means 26 on the distal end side of the second arm 25 moves down to press the upper surface side of the article behind the article W to be taken out. Next, as the tilt arm 27 slides rightward in FIG. Therefore, the article W tilts around the upper edge portion on the rear side thereof, and the lower surface on the near side of the article W rises, forming a gap between the article W and the lower article.

Thereafter, the belt conveyor 23 of the take-out device 20 enters the gap of the article W. Subsequently, the second arm 25 performs a retreat operation (moves in the leftward direction in FIG. 6), and moves the pressing means 26 to the upper surface side of the article W so as to press the article W, and conveys the article W to the roller conveyor 22. . The article W is transferred to the stock yard 32 by a pusher (not shown) at the end side of the roller conveyor 22,
The stock yard 32 is moved up and down independently of the second arm 25 to transfer the stocked articles W to the carry-out conveyor 31. At the end of the unloading conveyor 31, loading to a truck or the like is performed.

It should be noted that the present invention is not limited to the above-described embodiment, and appropriate changes can be made. For example, the mechanism for transmitting the drive between the front and rear wheels 4 and 5 and the intermediate pulleys 7 and 8 may use a chain drive system or a toothed belt in addition to the belts 10 and 12. The traveling cart 1 may be adapted to be able to travel on two parallel rails. In this case, the front and rear wheels 4 and 5 are mounted in pairs on each side. Will be done.

[0023]

As described above, according to the first aspect of the present invention, in a traveling vehicle installed on a rail so as to be able to travel, wheels are arranged at predetermined intervals before and after in a traveling direction. Since the front and rear wheels are connected by a drive transmission mechanism, even if the contact pressure of the wheels on the leading end in the traveling direction with respect to the rail decreases due to sudden start or sudden acceleration, the bogie can be driven by the remaining wheels, and high speed traveling can be achieved. It is possible to move the truck efficiently.

According to the second aspect of the present invention,
Since the intermediate pulley is arranged between the front and rear wheels and the front wheel and the intermediate pulley and the intermediate pulley and the rear wheel are connected by separate drive transmission mechanisms, the distance between the front and rear wheels is long. Even in this case, they can be easily connected.

Further, in the means of claim 3 of the present invention, two intermediate pulleys are provided between the front and rear wheels in a direction perpendicular to the traveling direction, and the two intermediate pulleys are connected by a constant velocity joint. Because the front wheel and one intermediate pulley and the other intermediate pulley and the rear wheel were connected by separate drive transmission mechanisms, respectively,
Even if separate drive mechanisms are not installed parallel to each other,
Due to the effect of the constant velocity joint, it is possible to accurately transmit the driving force to the front and rear wheels, and there is an advantage that the assembly of the drive transmission mechanism can be simplified.

[Brief description of the drawings]

1 shows a traveling vehicle according to the present invention, wherein FIG. 1 (a) is a plan view and FIG. 1 (b) is a front view.

FIG. 2 shows the relationship between the traveling vehicle and the rail according to the present invention, wherein FIG. 2 (a) is a left side view of the traveling vehicle and FIG. 2 (b).
FIG. 2 is a sectional view taken along the line AA in FIG.

FIG. 3 is a plan view showing a constant velocity joint of the traveling vehicle according to the present invention.

FIG. 4 is a sectional view taken along line BB in FIG. 3;

FIG. 5 is a schematic perspective view of a device for automatically extracting articles in an automated warehouse according to one embodiment of the present invention.

FIG. 6 is a schematic side view of a device for automatically extracting articles in an automated warehouse according to one embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Traveling trolley 2 ... Constant velocity joint 3 ... Truck frame 4 ... Front side wheel 5 ... Rear side wheel 6 ... Rail 7 ... Intermediate pulley 8 ... Intermediate pulley 10 ... Belt 12 ... Belt 14 ... Driving motor

Claims (3)

[Claims] 1. A traveling bogie mounted on a rail so as to be able to travel on rails, wherein wheels are arranged at predetermined intervals before and after in a traveling direction, and these front and rear wheels are connected by a drive transmission mechanism. Drive mechanism. 2. A traveling vehicle mounted on a rail so as to be able to travel on a rail, wherein wheels are arranged at predetermined intervals before and after in a traveling direction, and an intermediate pulley is arranged between the front and rear wheels. A drive mechanism for the traveling bogie, wherein the drive wheel and the intermediate pulley and the intermediate pulley and the rear wheel are connected by separate drive transmission mechanisms. 3. A traveling vehicle installed on a rail so as to be capable of traveling on a rail, wherein wheels are arranged at predetermined intervals before and after the traveling direction, and two intermediate pulleys are interposed between the front and rear wheels in a direction perpendicular to the traveling direction. And two intermediate pulleys are connected by a constant velocity joint, and the front wheel and one intermediate pulley and the other intermediate pulley and the rear wheel are connected by separate drive transmission mechanisms. The drive mechanism of the traveling trolley.