JPH06171502A - Rail running vehicle - Google Patents

Abstract

PURPOSE:To allow a vehicle to run stably on a guide rail of mono-rail type in its curving part with a certain preset radius of cornering. CONSTITUTION:A front 3a and a rear guide unit 3b are installed on the undersurface of a running body 1 traveling along a guide rail 2 and furnished with guide rollers 7a, 7b, 7c, 7d (9a...), among which those 7b, 7d (9b, 9d) front and rear arranged at a certain interval in the advancing direction being situated outside about the cornering have a fore-and-aft interval (L1) wider than the fore-and-aft interval (L2) of the other guide rollers 7a, 7c (9a, 9c) front and rear arranged at a certain interval in the advancing direction being situated on the inside about cornering. Therein the ratio L1/L2 is set so that the two in the straight portion and at a curving part having a preset radius of cornering (R1) can be pinched (contacted) to a vertical plate 2b having a thickness H1 of the guide rail 2 from the left and right by the left pair and right pair of guide rollers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a traveling vehicle in an unmanned conveyance system or the like that travels along a guide rail laid in a factory or the like.

[0002]

2. Description of the Related Art When a pair of front and rear guide units each including a set of traveling wheels and guide rollers are horizontally rotatably mounted on the lower surface of a traveling machine body of a traveling vehicle of this type. , Fact fair 1-27
As disclosed in Japanese Patent No. 492, each guide unit is provided with traveling wheels at both ends of an axle that is horizontally arranged at right angles to the traveling direction while straddling over a guide rail, and a center is provided on the upper surface of the left and right center of the axle. A plate is provided, and the axle is configured to horizontally rotate about the center plate. The front and rear sides of the axle are left and right via a swingable arm and a link mechanism. A means for urging the pair of guide rollers so as to be sandwiched between the left and right side surfaces of the guide rail is provided.

With such a configuration, the pair of left and right guide rollers guides curved leftward or rightward in plan view, even if the laying accuracy of the guide rails and the accuracy of the lateral widths of the guide rails themselves are poor. Although it is possible to press and hold the left and right side surfaces of the rail independently of each other, there is a problem that the structure for that purpose becomes extremely complicated. It is an object of the present invention to solve this problem and provide a traveling vehicle that can travel stably on a turning portion.

[0004]

In order to achieve the above object, the present invention provides a guide unit arranged on the lower surface of a traveling body traveling along a guide rail for sandwiching the left and right side surfaces of the guide rail. In a railroad traveling vehicle in which a pair of left and right guide rollers are appropriately arranged in the traveling direction,
The gap between the pair of left and right guide rollers is set to be equal to the distance on both the left and right sides of the guide rail, while the front and rear spacing of the guide rollers arranged on the outside of the guide rail is set to the inside of the guide rail. It is set so as to be wider than the front-rear spacing of the guide roller arranged at 1, and to follow the locus of the turning radius of a predetermined value of the turning portion of the guide rail.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described. Reference numeral 1 is a traveling machine body of a traveling vehicle which is mounted on a guide rail 2 having a substantially I-shaped cross section, and reference numerals 3a and 3b are the same as those described above. A pair of front and rear guide units arranged on the lower surface of the traveling machine body 1, and the machine frame 10 of one of the guide units 3a receives power from a drive motor 4 capable of rotating in the forward and reverse directions via a transmission mechanism 5 to drive traveling wheels. 6, and the traveling wheels 6 roll on the upper surface plate 2a of the guide rail 2. In the machine frame of the front guide unit 3a, four guide rollers 7a, 7b,
7c and 7d are provided so as to sandwich the left and right side surfaces of the vertical plate 2b of the guide rail 2. The machine frame 11 of the rear guide unit 3b is provided with an idler traveling wheel 8 that rolls on the upper surface plate 2a of the guide rail 2 and the guide rail 2
Guide rollers 9a, 9 sandwiching the left and right side surfaces of the vertical plate 2b of
b, 9c and 9d are provided.

The structure of these guide rollers will be described in more detail. As shown in FIG.
1. The four guide rollers 7a, 7b, 7c, 7d (9a, 9b, 9) are attached to the respective tip portions of the horizontal arms 12, 12 which are fixed to the upper and lower flanges 1 by bolts in a plan view and are substantially C-shaped.
c, 9d) are rotatably attached. At this time, the guide rollers 7a, 7b, 7c, 7d (9a,
9b, 9c, 9d), as shown in FIG. 3, FIG. 5, etc., when the traveling vehicle body 1 travels on a turning portion having a predetermined turning radius (R1), the traveling outside of the traveling vehicle body 1 (for example, FIG. Guide roller 7b, 7d (9b, 9)
The front-to-rear spacing (L1) in the traveling direction of d) is wide, and the guide rollers 7a and 7c (9) on the inner side of turning (for example, the left side in FIG. 3) are
a, 9c) is set to be narrower in the front-rear direction (L2) in the traveling direction, and the pair of left and right guide rollers 7a and 7b (9
a and 9b) outer peripheral clearance dimension, 7c and 7d and (9c and 9d) outer peripheral clearance dimension, and the front-rear spacing (L1).
As shown in FIG. 3, the ratio (L1 / L2) between (1) and (L2) is a vertical plate having a thickness dimension (H2) in the guide rail 2 of both the straight line portion and the preset turning radius value (R1). 2b
On the other hand, the pair of left and right guide rollers is set so that it can be sandwiched (contacted) from the left and right.

The front guide unit 3a is horizontally rotatably connected to the front portion of the traveling machine body 1 in the traveling direction via the machine frame 10 and the shaft supporting portion 15, and the rear guide unit 3b is connected to the front guide unit 3a. Through the machine frame 11 and the shaft supporting portion 16, the traveling machine body 1 is horizontally rotatably connected to a rear portion in the traveling direction. In addition, the shaft supporting portions 15 and 16 have a width dimension (2H
It is assumed to be on the left-right center line 18 of the traveling vehicle body 1) (see FIG. 4). Each guide unit 3 for the traveling body 1
In this embodiment, the pivot portions 15 and 16 of a and 3b are set at the front-rear intermediate positions between the pair of left and right guide rollers on the front side and the pair of left and right guide rollers on the rear side in the traveling direction (see FIG. 4).

Further, on the upper surface of the traveling machine body 1, there is provided a conveyor roller 17 having a built-in drive motor capable of carrying the load W and carrying the load W laterally with respect to the traveling direction.
Reference numeral 19 is a stopper for preventing the luggage W from falling sideways, and the stopper 19 is vertically movable by an actuator such as an electromagnetic solenoid (not shown). Furthermore, when forming a U-shaped or L-shaped traveling path in a plan view by combining a straight portion and a curved portion, a straight portion having a certain length is integrally formed at both ends of the guide rail 2 of the curved portion. By forming this linear portion and connecting the end portion of another linear guide rail 2 to each other, the rigidity of the guide rail of the curved portion is increased, and the two guide rails are connected by the linear portion. Therefore, the work is extremely easy and the connection accuracy can be increased.

With this configuration, when the traveling machine body 1 travels along the guide rail 2 that curves to the left, for example, in plan view, as shown in FIG. 6, the shaft support portions 15 and 16 at the left and right centers of the traveling machine body 1 are provided. The front and rear guide units 3a and 3b are horizontally rotated around. And, the front and rear intervals of the guide rollers lined up in the front and rear direction of the traveling machine body in each of the guide units 3a and 3b are located on the inner side of turning (L1) on the outer side of the turning part of the turning part having a predetermined turning radius in the guide rail. (L2) is set to be narrow, and the ratio (L1 / L2) of the front-rear spacing is set to a thickness dimension (H2) in the guide rail 2 for both the straight line portion and the preset turning radius value (R1). For the vertical plate 2b of
Since the guide rollers are set so as to be able to be sandwiched (contacted) from the left and right with the pair of left and right guide rollers, each guide roller can be stably run without twisting or rattling in both the straight portion and the turning portion of the guide rail. Of.

In the present invention, the traveling wheels 6 and 8 may be configured to be in contact with the ground or the like on the left and right sides of the guide rail 2. Further, the front guide unit 3a is horizontally rotatable with respect to the traveling machine body 1 about the vertical axis of the shaft support portion 15 positioned in front of the pair of left and right guide rollers 7a and 7b in the front portion thereof. Rear guide unit 3b
Is a pair of left and right guide rollers 9c and 9d near the rear portion.
It may be set so as to be horizontally rotatable with respect to the traveling machine body 1 around the vertical axis of the shaft support portion 16 located rearward of the main body.

According to this structure, most of the guide units 3a and 3b are offset to the outside of the turning from the center line of the traveling machine body 1, so that the guide units 3a and 3b are rotated.
Guide rollers 7c, 7d and guide roller 9 in
The portions where c and 9d sandwich the left and right side surfaces of the guide rail 2 are largely outside the turning radius with respect to the left and right centerlines of the traveling body 1, and can efficiently support the centrifugal force due to the turning of the traveling vehicle. It is possible to effectively prevent the traveling body 1 from tilting downward toward the outside of the turning.

[0012]

As described in detail above, according to the present invention, the abutting surfaces of the opposing outer peripheral surfaces of the pair of guide rollers sandwiching the guide rail from the left and right are always substantially perpendicular to the side surface. Therefore, both the left and right guide rollers can smoothly follow the left and right side surfaces of the guide rail regardless of whether the guide rail is a linear portion or a swing portion having a predetermined turning radius. As a result, an unnecessary twisting action does not occur in both guide rollers, and by extension, in the guide unit, and the effect of being able to travel stably on the turning portion is achieved.

Further, also in the structure therefor, since the installation positions of the four guide rollers in one guide unit are only preset, the structure is extremely simple and the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a side view of a traveling vehicle.

FIG. 2 is a front view taken along the line II-II of FIG.

FIG. 3 is an enlarged plan view of a main part taken along the line III-III of FIG.

FIG. 4 is a schematic plan view of a traveling vehicle on a straight line portion of a guide rail.

FIG. 5 is a schematic plan view of a guide rail.

FIG. 6 is a schematic plan view of a traveling vehicle in a turning portion of a guide rail.

[Explanation of symbols]

 1 traveling machine body 2 guide rail 2b vertical plate 3a, 3b guide unit 6, 8 traveling wheel 7a, 7b, 7c, 7d guide roller 9a, 9b, 9c, 9d guide roller 10, 11 machine frame 12 horizontal arm 15, 16 shaft support

Claims (1)

[Claims] 1. A pair of left and right guide rollers for sandwiching the left and right side surfaces of the guide rail are provided in a guide unit arranged on the lower surface of a traveling body that travels along the guide rail, and are appropriately arranged in the traveling direction. In the rail running vehicle
The gap between the pair of left and right guide rollers is set to be equal to the distance on both the left and right sides of the guide rail, while the front and rear spacing of the guide rollers arranged on the outside of the guide rail is set to the inside of the guide rail. The rail running vehicle is set so as to be wider than the front-rear spacing of the guide rollers arranged at 1, and to follow a locus of a predetermined turning radius of a turning portion of the guide rail.