JPH04218463A - Conveyor truck - Google Patents

Abstract

PURPOSE:To change the conveying direction at a rail intersecting part regardless of the number of direction change points without requiring rotating equipment on the rail floor side by providing a truck with an elevating device for lifting the truck from rails, and supporting wheels rotatably at rotary bases turnable around vertical shafts provided at the four corners of the truck. CONSTITUTION:Four screw jacks provided at a truck are extended, and the lower ends thereof are brought into contact with receiving members 13 provided on the floor surface 12 to elevate the truck 2 and to levitate wheels 6 from rails 1. Rotary bases 5 turnable around vertical shafts 4 are provided at the four corners of the truck 2. Each rotary base 5 is provided, at its lower face, with a bearing 14 to support a wheel 15. The vertical shaft 4 is provided with a worm gear 8, and the worm gear 8 is meshed with a worm 9 and connected to the output shaft of a driving motor 10. The truck 2 is stopped at the intersection part of the rails 1 and lifted by operating an elevating device 3, and four rotary bases 5 are turned by operating a turning device. Then the wheels 6 are held in the direction after turning and turned to the rails 1 in the new travel direction.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention is directed to a transport vehicle that can change the direction of four wheels at the intersection of rails and transfer from one rail to the other rail that intersects with it. It is related to.

``Prior Art'' Conventionally, the following devices have been used to transfer a traveling bogie from one rail to the other and change the running direction at a rail intersection.

A rotating table is installed at the intersection. This method requires a large rotary table on the rail bed side.

Some types form rotating short rails at intersections and rotate the short rails from one rail to the other. This method also has the same problems as the rotary table described above.

There is a multi-truck system that transfers objects at direction change points (intersections). This method requires a number of trolleys depending on the number of intersections, which not only complicates control but also requires transfer technology or equipment.

There is a multi-truck system, for example, a system in which a parent, child, grandchild, and multiple carts are configured, and the direction is sequentially changed from the child cart at the first direction change point to the grandchild cart at the next direction change point. This method requires a number of trolleys depending on the number of intersections, which increases costs and complicates control.There is also a limit to multiplexing, making it difficult to apply when there are many direction change points.

The curved carriage system is a method in which the direction of the rails is changed to a smooth curve at the intersection, and the direction can be changed with one carriage, but there is a limit to the radius of the carriage's curved travel, so it cannot be applied. This was extremely limited and required techniques such as changing the rotation speed of the inner and outer wheels when driving around curves.

"Problems to be Solved by the Invention" The present invention uses a single bogie that runs on the rails, does not require special rotation equipment on the rail bed side, and does not require any special rotating equipment on the rail bed side. The object of the present invention is to obtain a simple transport vehicle that can change the transport direction at a rail intersection.

"Means for Solving the Problems" In order to achieve the above object, the present invention provides a four-wheeled transport vehicle that runs on rails laid on the floor, in which a lifting device for lifting the trolley from the rails is provided on the trolley. and a rotating stand that can rotate around an upright axis is provided at the four corners of the trolley, and each wheel is pivotally supported on the rotating stand, and the rotating direction of the rotating stand can be self-maintained. The transport vehicle lifting device provided with a turning device is a jack, and is constituted by the transport vehicle according to the invention described above, in which a worm gear on the rotating table side and a worm on the drive motor side are engaged with each other so that the rotation direction can be self-maintained. Ru.

``Operation'' Therefore, the four-wheeled transport vehicle 2 is driven (arrow a) and stopped at the intersection 11 of the rails 1, 1 as shown in FIG. Then, the lifting device 3 using the jack 3' is operated to lift the truck 2.
When the four axles 6 are lifted upward, the four axles 6 rise from the rail 1 as shown in FIG.

In this state, operate the rotating device 7 to rotate the four rotating tables 5.
When the rotating base 5 is rotated from the position shown by the solid line in FIG. direction and is directed to the track 1, 1 in the new direction of travel (arrow b). In this state, when the lifting device 3 is operated to lower the truck 2, the wheels 6 are placed on the intersecting rails 1, 1 in the direction of arrow b, and the lower end of the jack 3' rises from the floor 12, so that the truck 2 is lowered. Cross the rail 1,
1 in the direction of arrow b.

"Example" Rails 1, 1 are laid on a floor surface 12, and intersect 11 in the directions of arrows a and b. A four-wheeled transport vehicle 2 is made to run on its own along the rails 1, 1. This truck 2 is provided with four screw jacks 3', and the jacks 3' are extended and contracted downward. Then, extend the jack 3' and place the lower end on the floor 12.
By contacting the receiver 13 provided at
2, and a lifting device 3 can be formed by the jack 3'. The jack 3' is not limited to a screw jack, and other hydraulic jacks may be used. At the four corners of the truck 2, a rotating stand 5 that can rotate around an upright shaft 4 is provided, and bearings 14, 14 are provided on the lower surface of the rotating stand 5, respectively, and an axle 15 is supported thereon.
5 is provided with a wheel 6 with jaws running on the rail 1 fixed to each other in the direction of rotation, and a sprocket 16 provided on the axle 15.
An endless chain 19 is wound between the rotary base 5 and a sprocket 18 provided on the output shaft of a deceleration brake motor 17 provided on the rotary table 5 to drive the wheels 6 so that they can run on the rail 1. The upright shaft 4 is mutually fixed to the rotating table 5 in the rotation direction, a worm gear 8 is provided on the upright shaft 4 via a key, a worm 9 is meshed with the worm gear 8, and the worm shaft is provided on the trolley 2. The rotary table 5 is connected to the output shaft of the drive motor 10, and the rotating direction of the rotary table 5 is self-maintained by the worm gear 8 and the worm 9. It is possible to drive the upright shaft 4 through a bevel gear instead of using the worm gear 8 and worm 9, and to self-maintain the rotation direction using a brake (of a brake motor), and is not limited to the worm gear 8 and worm 9. The number 20 in the figure is the trolley 2.
The coil supported above, 21 is its receiving surface, 22 in FIG. In the figure, 10' is the prime mover of the jack 3'.

"Effects of the Invention" Since the present invention is constructed as described above, it is possible not only to easily transfer from one rail 1 to another rail 1 that intersects it with one bogie 2, but also to easily change the running direction. , rail 1
, 1 has the advantage of not requiring complicated equipment at the intersection 11.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the conveyance vehicle of the present invention, and FIG.
Figure 3 is a front view taken along the line A-A in Figure 1, Figure 4 is a plan view of the intersection of the rails, Figure 5 is an enlarged view of the turning device, and Figure 6 is a front view of the rails. FIG. DESCRIPTION OF SYMBOLS 1...Rail, 2...4-wheel carrier, 3...Elevating device, 3'...Jack, 4...Upright shaft, 5...Rotating table, 6...Wheel, 7...Swivel device, 8...Worm gear, 9...Worm, 10 ...Drive electric motor. Patent applicant: Kobukuro Kosakusho Co., Ltd.

Claims (2)

[Claims] Claim 1: A four-wheeled transport vehicle that travels on rails laid on the floor, wherein the vehicle is provided with a lifting device for lifting the vehicle from the rails, and at four corners of the vehicle, the vehicle rotates around an upright shaft. 1. A transport vehicle, which is provided with a rotary table that can rotate, a wheel is pivotally supported on each rotary table, and a turning device that can self-maintain the rotational direction of the rotary table. 2. The carrier according to claim 1, wherein the elevating device is a jack, and a worm gear on the rotating base side and a worm on the drive motor side are engaged with each other so that the rotating direction can be self-maintained.