JP3474779B2 - Tracked bogie system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monorail ground traveling type tracked truck system. 2. Description of the Related Art FIG. 10 shows a layout of a tracked bogie system in a conventional example. Numeral 40 denotes two rails. For example, a plurality of automatic warehouse units 30 are arranged on one side of the loop, and conveyors 36 and 42 are arranged on the other side, and a carriage 41 conveys articles therebetween. The layout of this system is determined by the turning radius of the bogie 41, and the rails 40 protrude from the area where the automatic warehouse unit 30 is disposed to the left and right in the drawing by substantially the length of the turning radius. Further, between the upper part and the lower part of the loop of the rail 40, a useless space determined by the turning radius of the bogie 41 is required.
As described above, the larger the turning radius of the carriage 41, the more wasteful space is required, which reduces the utilization rate of the floor area of a factory or a warehouse, and increases the construction cost of the building. Apart from this, the use of two rails is disadvantageous also in terms of laying costs. SUMMARY OF THE INVENTION An object of the present invention is to make a guide rail a monorail so as to enable stable transportation while reducing rail installation costs. Another object of the present invention is to reduce the turning radius of the bogie, realize a compact tracked bogie system layout,
The goal is to make effective use of space. An additional object of the present invention is to prevent the vehicle from wobbling on a curve, thereby conveying articles more stably, and narrowing the interference range of the bogie. Yet another object of the present invention is to further reduce the turning radius of the bogie while preventing twisting of caster wheels. Further, when the twisting of the caster wheels is prevented, the wear of the caster wheels and the floor surface is reduced, and the generation of dust can be reduced as a secondary effect. According to the present invention, a monorail is laid on the floor surface, and a drive wheel and other wheels that can turn in each horizontal plane are provided before and after one side of a bottom portion of a bogie in a vehicle body. A pair of caster wheels traveling on the floor surface and rotatable in a horizontal plane before and after the other side of the bottom of the bogie body surface, the distance between the wheels being the drive wheel. and to be shorter than the wheel distance between the other wheel, substantially symmetrically with respect to the longitudinal vehicle body of the carriage direction center line, or
In front of the bogie's body at a position along the car's longitudinal direction.
One caster wheel between the rear center and the drive wheel
Place the wheel between the center of the bogie's longitudinal direction and the other wheel.
A tracked bogie system characterized by mounting other caster wheels . [0005] The installation positions of the drive wheels and the caster wheels are both on the bottom surface of the vehicle body, and those which protrude from the vehicle body are not included in the present invention. In order to guide the drive wheel by the rail, for example, a guide roller that contacts the rail may be provided so as to sandwich the rail. In addition, it is freely rotatable in the horizontal plane with respect to the vehicle body, that is, horizontally rotatable,
When one unit is provided with two drive wheels, for example,
In this specification, one wheel is considered, and the number of horizontally rotatable units is defined as the total number of wheels. The operation and effect of the present invention will be described.
Since a monorail is used in the present invention, installation costs such as material costs, installation work costs, transportation costs, and maintenance costs of the rails are reduced. Next, since the drive wheels are provided on one side of the cart and the caster wheels are provided on the other side, the cart is supported on both left and right sides in the forward direction, so that articles can be stably conveyed. Since the drive wheels guided by the rails are located on one side of the vehicle body, the vehicle body hardly protrudes outside the rails in a curve. Further, since the vehicle body is supported by caster wheels on the other side using a monorail, the direction of the bogie can be changed with a small turning radius close to a right angle, unlike the case of two rails. Therefore, the turning radius of the bogie is reduced, and a compact tracked bogie system can be realized. On one side of the truck, other wheels are provided in addition to the driving wheels. By doing so, the vehicle body sways to the outside of the rail at the curve is reduced, the posture is stabilized, and the interference area of the bogie is reduced, so that a compact tracked bogie system can be constructed. Further, a pair of caster wheels is provided on the other side, and the distance between the wheels is shorter than the distance between the wheels on the driving wheel side. The pair of caster wheels is in the longitudinal direction of the bogie
Placed almost symmetrically with respect to the center line, and front and rear of the bogie
At the position along the direction,
One caster wheel between the drive wheel and the bogie body
Another caster wheel between the center in the front-rear direction and the other wheel
Arrange the rings. The shorter the distance between the wheels on the caster wheel side, the smoother the trajectory of the caster wheels on the curve, and the smaller the turn. When a pair of caster wheels is provided on the other side, the caster wheels do not twist and do not rotate on a curve, and can be turned smoothly. Since the caster wheels are not twisted, wear of the caster wheels and the floor surface is reduced, and the generation of dust can be reduced as a secondary effect. An embodiment will be described with reference to FIGS. 1 to 9 in comparison with a conventional example. FIG. 1 shows a main part of the bogie 2. A drive wheel unit 6 and a driven wheel unit 8 are provided at a lower portion of a bottom surface of the vehicle body 4 on one side of a center line along a forward direction of the vehicle body 4, and these are connected. The line is parallel to the outer periphery of the side surface of the vehicle body 4. On the other side of the bottom of the body 4, a pair of caster wheels 1
0 and 11 are arranged. The axles of the caster wheels 10 and 11 are rotatable in a horizontal plane, and the axles of the drive wheel unit 6 and the driven wheel unit 8 are rotatable in a horizontal plane.
Reference numeral 12 denotes a rail, 14 denotes a power supply line attached to the rail 12, and 16 denotes a floor surface on which the rail 12 is installed. FIGS. 2 and 3 show the drive wheel unit 6.
Reference numeral 20 denotes a drive wheel, 22 denotes a traveling motor for rotating the drive wheel 20, and 21 denotes, for example, four guide rollers, which guide the drive wheel 20 by sandwiching the rail 12 from the left and right. These components are attached to a bracket 24, and the entire drive wheel unit 6 is attached to the vehicle body 4 at an attachment portion 26 so as to be pivotable in a horizontal plane. FIG. 4 shows the structure of the driven wheel unit 8.
The driven wheel unit 8 is configured in the same manner as the drive wheel unit 6 except that the traveling motor 6 is not provided and a terminal (not shown) for contacting the power supply line 14 is provided instead. Then, the driven wheel 27 is guided by the rail 12 by, for example, four guide rollers 21. And mounting part 2
6, the driven wheel unit 8 is mounted so as to be pivotable in a horizontal plane. FIG. 5 shows a traveling locus of the bogie 2 of the embodiment on a curve. For comparison, FIG. 6 shows that the rail 12 is disposed at the center of the bogie 3 and is run on the rail 12 using the units 6 and 8, and a pair of caster wheels 10 and
11 shows a locus in a comparative example provided with No. 11. In the embodiment of FIG. 5, the two units 6, 8 are guided by the rail 12, and the other side of the carriage 2 is supported by the caster wheels 10, 11. As a result, the carriage 2 is supported at four points, irrespective of the monorail, and articles can be stably conveyed. In addition, since the drive wheel unit 6 and the driven wheel unit 8 are rotatable in a horizontal plane on the monorail, and the other side is supported by the caster wheels 10 and 11, the direction of the bogie can be rapidly changed, and the turning radius can be reduced. Can be smaller. Up to this point, the embodiment and the comparative example are common. In the embodiment, since the units 6 and 8 are on one side of the bogie 2, the outer periphery of the side surface of the body 4 on the unit 6 and 8 side is constantly kept parallel to the line connecting the units 6 and 8. In the resulting curve, the outer periphery of the vehicle body is parallel to the tangent to the rail 12 at the midpoint of the units 6,8. Therefore, as shown in FIG. 5, the area where the vehicle body protrudes outside from the rail 12 on the curve is small. Next, when the curvature of the rail 12 is the same, as is apparent from a comparison between FIG.
Has a smaller turning radius. For this reason, the tracked bogie system can be made compact. Here, the caster wheels 10, 1
Looking at the movement of the outer periphery of the side surface of the bogie 2 on the side where 1 is provided, a point occurs where this position hardly moves in the curve. This point is shown as F in FIG. The meaning of this will be described with reference to FIG. FIG. 7 shows the relationship between the positions of the caster wheels 10, 11 and the locus on the curve. The locus passing through A in FIG. 7 is a case where the caster wheels 10 are arranged in parallel with the drive wheel unit 6, and the caster wheels 10 show a complicated locus in a curve. The locus passing through B in FIG. 7 is a modified example in which only one caster wheel is arranged at the center on the other side in the vehicle body length direction. The locus of the caster wheels in this case is a simple one concentric with the rail 12,
Even if the vehicle body 4 turns at the center of the curve, the caster wheels hardly move, and a point G is generated in which only the rotation in the axle direction in the horizontal plane is required as the direction of the vehicle body changes. In this position, the caster wheel B hardly rotates, and a twisting motion with respect to the floor is likely to occur. As is apparent from FIG. 7, the smaller the distance between the caster wheels 10 and 11 is, the simpler the locus on the curve is, and the smaller the turn can be made. On the other hand, if one caster wheel is provided at the center of the vehicle body in the front-rear direction, twisting is likely to occur at the center of the curve. Therefore, a pair of caster wheels 10, 11 are provided on the other side of the vehicle body 4,
The inter-wheel distance between them is shorter than the inter-wheel distance between the driving wheel unit 6 and the driven wheel unit 8 , and the front and rear of the bogie body
Between the center of the vehicle body and the drive wheels
Connect one caster wheel to the center of the body and the other wheel
So that the other caster wheel is located between
Thus , the locus of the curve can be made smooth, the wear of the caster wheels 10, 11 and the floor surface can be reduced, and the generation of dust and the like can be reduced as a secondary effect. The distance between the wheels is the distance between the ground points of the wheels. FIG. 8 shows a pair of caster wheels 10 and 11.
5 shows a trajectory in a modified example in which only one drive wheel unit 6 is provided at the center of one side of the vehicle body. In this case, the vehicle body 4 is supported at three points and stable traveling is possible, but the vehicle body sways on a curve, and the vehicle body 4 protrudes largely outside the rail 12. The point at which the vehicle body largely protrudes from the rail 12 is shown as a point H in FIG. The reason why the vehicle body protrudes from the rail 12 is that, in the embodiment shown in FIG.
In the modification of FIG. 8, there is a position where the outer periphery of the side surface of the vehicle body 4 is not parallel to the rail 12.
This is to protrude greatly from 2 to the outside. As is apparent from FIGS. 5 to 8, in the embodiment, stable running is possible even on a monorail, the turning radius on a curve is small, the turning can be made almost at a right angle, and the caster wheels 10, 11 are twisted. Does not occur. Furthermore, the area where the vehicle body 4 protrudes from the rail 12 on the curve is small, and the interference range of the bogie 2 is narrow. Rail 12 for these
Can be reduced, and a compact layout can be achieved. FIG. 9 shows an example of the layout of the tracked truck system in the embodiment. In FIG. 9, 30 is an automatic warehouse unit, 31 and 32 are racks, 33 and 34 are loading and unloading stations, and 35 is a track for running a stacker crane and the like. Further, the rails 12 are arranged in, for example, a substantially rectangular loop, a plurality of automatic warehouse units 30 are arranged on one side of the loop, and the conveyors 36 and 37 are arranged on the other side.
And so on to connect with the truck yard and sort incoming and outgoing goods. Reference numeral 38 denotes a turntable provided on the conveyor 37. The conveyor 37 is used for sorting articles, some of the articles are returned to the automatic warehouse unit 30, and the remaining articles are carried out to a truck yard or the like. In the embodiment, since the turning radius of the bogie 2 can be reduced, the rail 12 can be turned substantially at a right angle with a small turning radius as shown in FIG. 9 to form a narrow loop. As shown in FIG. 9, the interval between the upper and lower loops of the rail 12 can be set so that the bogies 2 and 2 do not collide with each other. Also rail 1
2 can be bent almost at right angles outside the loading / unloading station 33, the conveyor 36, and the like, so that the space where the rail 12 protrudes from the automatic warehouse unit 30 and the like can be reduced. For these reasons, a compact tracked bogie system with a small installation cost can be realized.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a main part of a bogie in a tracked bogie system according to an embodiment; FIG. 2 is a side view of a main part of a bogie according to an embodiment; FIG. FIG. 4 is a plan view of a main part of a wheel side driven wheel part of the bogie in the embodiment. FIG. 5 is a plan view showing an interference range of the bogie on a curve in the embodiment. FIG. 7 is a plan view showing an interference range of a bogie on a curve in a conventional example. FIG. 7 is a plan view showing a relationship between a caster wheel position and a trajectory in the embodiment. FIG. 8 When the rail-side driven wheels are abolished in the embodiment. FIG. 9 is a plan view showing a layout of a tracked bogie system according to an embodiment. FIG. 10 is a plan view showing a layout of a conventional example. [Description of reference numerals] 2 bogies 4 body 6 driving wheel units 8 Follower wheel unit 10, 11 Caster wheel 12 Rail 14 Power supply line 16 Surface 20 drive wheels 21 guide rollers 22 travel motor 24 bracket 26 mounting portion 27 driven wheel 30 automated warehouse units 31 and 32 the rack 33 entry and leaving station 35 the track 36, 37 the conveyor 38 the turntable

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) B61B 13/06 B61B 13/00 B61B 13/12

Claims (1)

(57) [Claims] [Claim 1] While laying a monorail on the floor,
Before and after one side of the bottom of the bogie body surface, drive wheels and other wheels that can be turned in each horizontal plane are provided and guided by the monorail, and further before and after the other side of the bogie body surface bottom. ,
A pair of caster wheels that run on the floor surface and are pivotable in a horizontal plane, such that the distance between the wheels is shorter than the distance between the drive wheels and the other wheels.
Almost symmetrical with respect to the longitudinal center line and in front of the bogie
At the position along the rear direction, the center of the bogie body in the front-rear direction and the front
One caster wheel between the drive wheel and the truck
Another caster between the front and rear center and the other wheel
A tracked truck system characterized by mounting wheels .