JP6474928B1 - Self-propelled trolley - Google Patents

Abstract

To provide a self-propelled carriage capable of stable running in a self-propelled carriage that travels on a rail having a separation portion.
A self-propelled carriage 1 that is self-propelled on a rail 2 in which a separation portion is formed at an intersection, and includes two sets of front axles 4a and 4b, and four wheels attached to both ends. It has front wheels 5a, 5b, two rear axles 6a, 6b, and four rear wheels 7a, 7b attached to both ends, and all four axles are motors 8a, 8b. When all the eight wheels are driven by motors 8a and 8b via four axles, the eight wheels are when the two wheels at both ends of one axle are on the separation part. The remaining six wheels are arranged on the rail 2.
[Selection] Figure 1

Description

  The present invention relates to a self-propelled carriage that self-propels on a rail having an intersection.

  In an ironworks or the like, a crane that lifts and conveys heavy objects may be used in combination with a carriage that carries iron materials and the like. In this case, the crane and the carriage travel on their own rails, but at the intersection of the rails, for example, the carriage rail is separated, and the crane rail is arranged in this separation part. The rails do not interfere with each other.

  In such a rail structure, when the wheel passes through the separation part, the wheel falls into the separation part, and there is a problem that the carriage vibrates or the rail is damaged. For this reason, in the cart described in Patent Document 1, when the wheel is on the notch (separation part), the wheel may be placed so that the other wheel is on the rail, and the wheel may fall into the separation part. I am trying not to.

JP 54-29418 A

  However, the cart described in Patent Document 1 only focuses on the arrangement of the wheels, and does not focus on the driving of the wheels. More specifically, Patent Document 1 states that “the full load of a carriage traveling on a notched rail must be supported by six wheels out of eight wheels. For example, when running a steel receiving cart with a large load and a work cart with a small load on an orthogonal rail in a converter plant, a steel receiving cart with a large load is applied to an uncut rail. You can run a car with a light load on the notched rail. "

  That is, in Patent Document 1, the wheel arrangement described in the same document is not limited to pointing out the problem when traveling a cart with a large load, and the problem of deterioration in traveling performance when the wheel is on a notch is pointed out. In addition, no structure for solving this problem has been proposed.

  The present invention solves the above-described conventional problems, and an object of the present invention is to provide a self-propelled carriage that can stably travel in a self-propelled carriage that travels on a rail having a separation portion.

  In order to achieve the above object, the self-propelled carriage of the present invention is a self-propelled carriage that self-propels on a rail, and the rail includes two sets of first rails and two sets of second rails. Each of the two rails intersects to form a crossing portion, a separation portion is formed in the first rail at the crossing portion, and the second rail is arranged in the separation portion. A front wheel axle, four front wheels attached to both ends of the front wheel axle, a set of two rear wheel axles, and four rear wheels attached to both ends of the rear axle. All four axles of the two sets of front wheel axles and the two sets of rear wheel axles are driven by a motor, and the four front wheels and the four rear wheels are connected to each other. All eight wheels are driven by the motor via the four axles, and the eight wheels have two wheels at the front of one axle. When located on the separation unit, characterized in that the wheels of the remaining six wheels are arranged to be on the first rail.

  According to this configuration, even when two of the eight wheels are on the separation part, the other six wheels are on the rail, so the self-propelled carriage maintains a stable posture without impairing the horizontal state. In addition, since all the other six wheels are driven by the motor, the driving force sufficient for traveling can be maintained, so that the self-propelled carriage can stably travel.

  The self-propelled carriage of the present invention further includes a direct current power source and an inverter that converts direct current from the direct current power source into alternating current, the motor being an alternating current motor, and the two-wheel set of front wheel axles. And a second motor for driving the two rear wheel axles, and the first motor and the second motor are driven by a single inverter. It is preferred that

  According to this configuration, the electric circuit is simplified as compared with the DC motor drive type, so that the cost is reduced and the control system can be stably operated, and the first and second motors Is driven by a single inverter, the rotational speeds of the two motors can be adjusted with a simple configuration, and the running is stabilized. This is advantageous when the self-propelled carriage travels on a rail having a separation portion.

  The effect of the present invention is as described above. Even when two of the eight wheels are on the separation part, the other six wheels are on the rail, so that the self-propelled carriage is not damaged in the horizontal state. Since a stable posture can be maintained and all the other six wheels are driven by a motor, a driving force sufficient for traveling can be maintained, so that the self-propelled carriage can travel stably.

The external appearance perspective view of the self-propelled cart concerning one embodiment of the present invention. The expansion perspective view which shows the drive mechanism of the self-propelled carriage which concerns on one Embodiment of this invention. The schematic plan view which shows the drive system of the self-propelled carriage which concerns on one Embodiment of this invention. The front view of the self-propelled trolley | bogie which concerns on one Embodiment of this invention. The side view of the self-propelled cart concerning one embodiment of the present invention. The circuit diagram of the motor drive of the self-propelled cart which concerns on one Embodiment of this invention. The perspective view which shows arrangement | positioning of the rail which the self-propelled cart which concerns on one Embodiment of this invention drive | works. The side view which shows the state in which the self-propelled cart which concerns on one Embodiment of this invention is drive | working on a rail. The side view which shows the state which driving | running | working of the self-propelled cart advanced from the state of FIG. The side view which shows the state which driving | running | working of the self-propelled cart advanced from the state of FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, an outline of the self-propelled carriage 1 will be described with reference to FIG. FIG. 1 is an external perspective view of a self-propelled carriage 1 according to an embodiment of the present invention. The self-propelled carriage 1 travels on a set of two rails 2. A set of two front wheel axles 4a and 4b is attached to the base. Front wheels 5a are attached to both ends of the front wheel axle 4a, and front wheels 5b are attached to both ends of the front wheel axle 4b. Similarly, two sets of rear wheel axles 6a and 6b are attached to the base. Rear wheels 7a are attached to both ends of the rear wheel axle 6a, and rear wheels 7b are attached to both ends of the rear wheel axle 6b.

  Two motors are mounted on the base 3. Two sets of front wheel axles 4a and 4b are driven by one motor 8a, and two sets of rear wheel axles 6a and 6b are It is driven by the other motor 8b. FIG. 2 is an enlarged perspective view showing a drive mechanism of the self-propelled carriage, and is an enlarged view of a portion A in FIG. FIG. 3 is a schematic plan view showing a drive system of the self-propelled carriage 1. In FIG. 2, two gears 10 and 11 are attached to the shaft 9 of the motor 8a. Gears 12a and 12b are attached to the front wheel axles 4a and 4b, respectively. A chain 13a is bridged between the gear 10 and the gear 12a, and a chain 13b is bridged between the gear 11 and the gear 12b.

  The rotation of the gear 10 is transmitted to the gear 12a via the chain 13a, and the front wheel axle 4a is rotationally driven. The rotation of the gear 11 is transmitted to the gear 12b via the chain 13b, and the front wheel axle 4b is rotationally driven. . This drive mechanism is common on the front wheel side (A portion in FIG. 1) and the rear wheel side (B portion in FIG. 1). In FIG. 3, a set of two is associated with the driving of the motor 8a on the front wheel side. The front wheel axles 4a and 4b are driven, all four front wheels 5a and 5b are driven, and the rear wheel axles 6a and 6b are driven as the rear wheel motor 8b is driven. All four rear wheels 7a, 7b are driven. That is, all the eight wheels including the front wheels 5a and 5b and the rear wheels 7a and 7b are driven as the motors 8a and 8b are driven.

  FIG. 4 shows a front view of the self-propelled carriage 1, and FIG. 5 shows a side view of the self-propelled carriage 1. As shown in FIG. 4, the front wheels 5 a at both ends of the front wheel axle 4 a are respectively on the rail 2. As shown in FIG. 5, the front wheels 5 a and 5 b and the rear wheels 7 a and 7 b are on the rail 2. 4 and 5, all the wheels are not shown, but all the eight wheels are on the rail 2, and as described above, all the eight wheels are driven by the motors 8a and 8b. 2 is run along the longitudinal direction of the rail.

  As shown in FIGS. 1 and 5, the self-propelled carriage 1 includes a charger 20, a battery 21, and a control panel 22, and although not shown, an inverter 23 and a D / A converter 24 (see FIG. 6). ) Is installed. The motors 8a and 8b are driven by these electrical components. FIG. 6 shows a circuit diagram of the motor drive. In this circuit, an AC motor is driven by a battery which is a DC power source.

  Hereinafter, explanation will be given while showing numerical examples. In FIG. 6, the battery 21 is charged by the charger 20, and AC 100V is converted to DC 24V. The direct current 24V from the battery 21 is converted into a single-phase alternating current 200V by the D / A converter 24. This single-phase AC 200V is converted into a three-phase AC 200V by the inverter 23. The motors 8 a and 8 b are AC motors, and both are driven by a single inverter 23. The inverter 23 can also change the frequency of the three-phase AC 200V that drives the motors 8a and 8b.

  According to this configuration, since the power source is a DC power source of the battery 21, a power feeding cable is not necessary. For this reason, it is possible to manufacture at a low cost, and there is no restriction on the operation range, and there is no failure during operation due to cable cutting or the like. In addition, since the electric circuit is simplified as compared with the DC motor drive type, the cost is reduced and the control system can be operated stably.

  Further, in the circuit of FIG. 6, since the two motors 8a and 8b are driven by the single inverter 23, the rotational speeds of the two motors 8a and 8b can be adjusted with a simple configuration, and the running is stabilized. As will be described later, this is advantageous when the self-propelled carriage travels on a rail having a separating portion as in this embodiment.

  Hereinafter, the traveling of the self-propelled carriage 1 will be specifically described. FIG. 7 is a perspective view showing the arrangement of rails on which the self-propelled carriage 1 travels. In FIG. 7, a pair of first rails 2 and a pair of second rails 25 intersect to form an intersection, and a separation portion 26 is formed on the first rail 2 at the intersection. In addition, the second rail 25 is disposed in the separation portion 26.

  In the rail arrangement of FIG. 7, the first rail 2 in which the separation portion 26 is formed intersects with the second rail 25 in which the separation portion 26 is not formed. As will be described later, the self-propelled carriage 1 according to the present embodiment is suitable for traveling on the first rail 2 in which the separation portion 26 is formed. About the 2nd rail 25 in which the separation part 26 is not formed, the crane which lifts and conveys a heavy article travels, for example. If the rail spacing between the first rail 2 and the second rail 25 is the same, the self-propelled carriage 1 can also travel both the first rail 2 and the second rail 25.

  FIG. 8 is a side view of the self-propelled carriage 1 traveling on the first rail 2. Although not shown in the figure, the base 3 of the self-propelled carriage 1 is loaded with iron or the like that is a conveyed product. In the state of FIG. 8, all of the front wheels 5 a and 5 b and the rear wheels 7 a and 7 b are on the first rail 2, and all eight wheels are on the first rail 2. As described above, all the eight wheels are driven by the two motors 8a and 8b, and the self-propelled carriage 1 proceeds in the direction of arrow a.

  FIG. 9 shows a state in which the traveling of the self-propelled carriage 1 has advanced from the state of FIG. In the state of this figure, the front wheel 5a is on the separating portion 26. On the other hand, the upper end of the second rail 25 is below the upper end of the first rail 2 so that the flange portion 15 (see FIG. 4) of the front wheel 5a does not ride on the second rail 25. . In addition, a total of six wheels including the front wheel 5b and the rear wheels 7a and 7b other than the front wheel 5a are on the first rail 2, and the self-propelled carriage 1 is in a stable posture without impairing the horizontal state in the direction of arrow a. You can continue running.

  In the state of FIG. 9, since two of the eight wheels of the self-propelled carriage 1 are not on the first rail 2, the driving force of the self-propelled carriage 1 is reduced. However, since the six wheels are still on the first rail 2 and all the six wheels are driven by the motors 8a and 8b, the stable traveling of the self-propelled carriage 1 is maintained while maintaining a sufficient driving force for traveling. Is possible.

  FIG. 10 shows a state in which the traveling of the self-propelled carriage 1 has advanced from the state of FIG. In the state of this figure, the front wheel 5a passes over the separation part 26, and all the eight wheels are on the first rail 2, so that it is possible to run in a state where a stable posture and sufficient driving force are ensured. .

  When the traveling of the self-propelled carriage 1 progresses from the state of FIG. 10 (in the direction of arrow a), the front wheel 5b is on the separation unit 26, and then the rear wheel 7a is on the separation unit 26, and the rear wheel 7b Will be on the separator 26. In any case, as in the state of FIG. 9, the six wheels are still on the first rail 2 and all the six wheels are driven by the motors 8a and 8b, so that the driving force sufficient for traveling was maintained. In this state, the self-propelled carriage 1 can travel.

  The embodiment of the present invention has been described above, but the embodiment is an example and may be changed as appropriate. For example, the drive mechanism by the motors 8a and 8b shown in the A part and the B part in FIG. 1 is an example, and any of the eight wheels may be driven by the motor. Therefore, gears may be used in place of the chains 13a and 13b in FIG. 2, and dedicated motors may be provided for the axles 4a and 4b.

DESCRIPTION OF SYMBOLS 1 Self-propelled carriage 2 First rail 3 Base 4a, 4b Front wheel axle 5a, 5b Front wheel 6a, 6b Rear wheel axle 7a, 7b Rear wheel 8a, 8b Motor 21 Battery (DC power supply)
23 Inverter 25 Second rail 26 Separating section

Claims (1)

A self-propelled carriage that runs on rails,
In the rail, a pair of two first rails and a pair of two second rails intersect to form an intersection, and a separation portion is formed in the first rail at the intersection, The second rail is disposed in the separation portion;
A set of two front axles,
Four front wheels attached to both ends of the front wheel axle;
A pair of two rear wheel axles,
And four rear wheels attached to both ends of the rear wheel axle,
All four axles of the two sets of front wheel axles and the two sets of rear wheel axles are driven by a motor, and all four wheels of the four front wheels and the four rear wheels are driven by a motor. Is driven by the motor via the four axles,
The eight wheels are arranged such that when the two wheels at both ends of one axle are on the separation part, the remaining six wheels are on the first rail ,
DC power supply,
An inverter that converts direct current from the direct current power source into alternating current;
The motor is an AC motor, and includes a first motor that drives the two sets of front wheel axles and a second motor that drives the two sets of rear wheel axles,
The first motor and the second motor are driven by a single inverter .

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