JPH02250602A - Power supply for travel body - Google Patents

Abstract

PURPOSE:To improve the reliability and to prevent production of dust by running a travel body through a first rope while running the travel body in the opposite direction through a second rope then winding/rewinding a cable around/ from a cable drum and advancing a roller into a travel path in order to hold the cable. CONSTITUTION:When a drum 41 is driven to wind a first rope 61, a cable drum unit 50 moves to the drum 41 side and a second rope 62 is fed out. When the cable drum unit 50 moves, a travel body 30 also moves to the drum 41 side. When the drum 41 is driven in the opposite direction and the second rope 62 is wound, the travel body 30 travels and the first rope 61 is fed out. Consequently, the cable drum unit 50 is pulled by a third rope 63. A roller holds the cable 56 without impeding travel of the travel body 30.

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a power supply device for a traveling body traveling on a traveling path.

<Prior Art> The forms of automatic conveyance devices that have been implemented in the past can be roughly divided into the following two types.

One type is a self-propelled trolley type, which is equipped with a battery and can be powered or replaced only at fixed points. The other type is one in which the hitting body runs on fixed rails, and the running body and the power source are connected by a cable conveyor, or a curtain type cable is installed along the running path. The power is supplied through the power source or through a current collector.

The curtain-type cable is a cable suspended from hangers via hangers on hanger rails arranged along a travel route.

<Problems to be Solved by the Invention> However, in a self-propelled truck, since the battery and its control device are mounted, the truck becomes large and the required area becomes large. Therefore, there was a problem that the building area became large and the equipment cost increased.

On the other hand, in the case of a cable conveyor type power supply system for a traveling object running on a running road, as the traveling distance of the traveling object increases, the length of the cable conveyor also increases and its weight increases, so the strength of the cable conveyor increases. I won't have it. Therefore, the distance traveled will be limited. In addition, in the case of this curtain cable system, if the length of the running path becomes long, it is necessary to increase the number of hangers or to lengthen the hanging length of the cable from the hanger. And - for boat fishing, the hanging length of the cable is limited within a certain range, so the number of hangers has to be increased to keep the hanging length within the limit, which causes the traveling body to shift incorrectly. There is a problem. In addition, when using a current collector, there are problems with reliability due to life expectancy due to wear, sparks due to corrosion, and communication failures due to this.

The present invention was devised in view of the above circumstances, and has a compact structure even when traveling over a relatively long distance, requires as little space as possible, is highly reliable, and can be used in clean rooms and other places where dust generation must be prevented. The object of the present invention is to provide a power supply device for a traveling body that can also be used.

<Means for Solving the Problems> A running power supply device according to the present invention is a power supply device for a running body running on a running track installed on a floor surface, and is fixed to one end of the running track and has first and second a drum for driving the rope; a motor for rotating the drum; a first rope sheave for guiding the first rope and a third rope sheave for guiding the first rope, which are movable between the drum and the traveling body. A cable unit including a rope sheave and a cable drum for guiding a power supply line, and a rope tensioning means for tensioning one end of the rope, and the first
The front end of the rope is fixed to the drum or the second rope, the rear end is fixed to the drum side running road end via the first rope sheave, and the front end of the second rope is fixed to the drum or the first rope, The rear end is connected to the running body via a second rope sheave fixed to the other end of the running road, and the tip of the power supply line is connected to the running body, and the rear end is connected to the running track via a cable drum. It is characterized by being fixed approximately in the center.

<Function> By winding the first rope, the traveling body travels a distance twice as long as the moving length of the cable drum unit. Further, by winding the second rope, the cable drum unit runs twice as far as the moving length of the cable drum unit in the opposite direction. The cable is then wound up and unwound by the cable drum as the cable drum unit moves. Changes in rope tension that occur while the traveling body is running are absorbed by the rope tensioning means, and the rope does not become slack. Further, in relation to the traveling of the traveling object, the rollers of the cable holding means escape from the traveling path while the traveling object is passing, and after the traveling object has passed, enter into the traveling path and hold the cable.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of the device of the present invention, (a) is a plan view, (a) is a plan view, (
b) is a front view, (c) is a side view, Fig. 2 is an explanatory diagram showing how to hang a rope in the device of the present invention, Fig. 3 is an external perspective view of the device of the present invention with a part omitted, and Fig. 4 The figures show a cable drum unit, (a) is a sectional view, (b) is a side view, and Figure 5 is an explanatory diagram of the operation of the cable holding means, (a) is when the roller enters, and (b) is when the roller exits. It shows.

The device 1O of the present invention includes a drum 41 provided at one end of a running path 20 along which a running body 30 runs, a motor 42 for rotationally driving the drum 41, a cable drum unit 50, a cable 56, and a rope 61 made of metal wire. 62.
63, rope tensioning means 64, and cable holding means 70.

The travel path 20 is formed by disposing a linear guide 21 over a predetermined length on the bottom wall of the pit between a stocker (not shown) and the manufacturing device 11.

The running body 30 is provided with a linear bearing 31 that fits into the linear guide 21 on the bottom surface of a vertical leg portion having an L-shaped cross section when viewed from the side, and holds the wafer on the running path 20 for a predetermined distance as described below. It is designed to run by being pulled by a robe that moves.

The drum 41 is used to wind and unwind first and second ropes, which will be described later, and includes a chain, belt, coupling, etc.
3 to the motor 42.

The cable drum unit 50 is provided with a linear bearing 58 fitted to the linear guide 21 on the bottom surface of the leg portion of the frame 57.

Further, the cable drum unit 50 includes a first rope sheave 51, a third rope sheave 53, a first cable drum 54, and a second cable drum 55. The third rope sheave 53 is attached to the cable drum unit 5
It is located approximately in the center of 0, and the first
The cable drum 54 and the second cable drum 55 are formed integrally or separately. The first rope sheave 51 is provided outside the first cable drum 54. The third rope sheave 53, the first and second cable drums 54 and 55 that sandwich it, and the first rope sheave 51 are separately rotatably supported on a shaft 59. Note that the second rope sheave 52 is fixed to the opposite end of the running path 20 to the drum. 57a is frame 57
The connecting rod 59a is a guide roller that prevents the cable 56 from hanging down.

One end of the cable 56 is connected to the terminal board 32 of the running body 30, and the other end is connected to a cable cleat 60 provided near the approximate center of the running path 20 by winding the first and second cable drums 54 and 55. connected to the power supply through this. When the traveling body 30 travels back and forth, the cable drum 50 moves back and forth, and the cable 56 wound around the first and second cable drums 54 and 55 is transferred to the traveling body 30.
It is designed to be unwound or wound up.

The tip of the first lobe 61 is fixed to the drum 41, and the rear end is fixed to the installation side end fixing position 22 of the drum 41 on the running path 20 via the first rope sheave 51.

Further, the tip of the second rope 62 is fixed to the drum 41, and the rear end is connected to the fixed position 33 on the side opposite to the drum of the traveling body 30 via the second rope sheave 52.

Furthermore, an air cylinder 64 is fixed near the approximate center of the traveling path 20 as a lobe tensioning means. The third lobe 63 has its tip connected to the fixed position 34 on the drum side of the traveling body 30, and its rear end connected to the piston rod tip 64a of the air cylinder 64 via the third rope sheave 53. There is.

The first rope 61 and the second rope 162 are connected to the drum 4.
They are respectively wound inwardly from both ends of the drum 41 in opposite directions so that when one is wound up by one rotation, the other is unwound.

A plurality of sets of cable holding means 70 are arranged along the running path 20, and each set includes a roller 71 that holds the cable 56, an air cylinder 72 that turns the roller 71 approximately 9 degrees, and a position of the running body 30. A pair of sensors 7 that detect
3.74, and a control section 74 that differentially moves the air cylinder 72 based on the outputs of the sensors 73 and 74.

The roller 71 consists of a cylindrical body and a shaft 71a that rotatably supports the cylindrical body and has a fixed tip end. Further, the tip of the piston rod of the air cylinder 72 is connected to a position 71b spaced apart from the fixed end of the shaft 71a.

The sensors 73 are arranged at predetermined intervals before and after the traveling path with the roller 71 as the center, and are arranged at predetermined intervals before and after the traveling path.
It detects the passage of the limit switch, and is composed of, for example, a pair of limit switches 73 and 74.

Normally, the roller 71 enters the running path 20 in a direction perpendicular to the longitudinal direction and holds the cable 56, and when the running body 30 approaches, it turns 90 degrees and escapes from the running path 20. ing. That is, in FIG. 5(a), the sensor 74 detects the traveling body 30 traveling in the direction of the arrow, and this output is input to the control section 75. Control unit 7
5 operates the air cylinder 72 based on the output of the sensor 74. As a result, the roller 71 turns about 90 degrees, escapes from the running path 20 as shown in FIG.
0 can pass. After the traveling body 30 has passed, the roller 7
1 is caused to enter the travel path 20 by operating the air cylinder 72.

Next, the operation of the device IO of the present invention will be explained.

(2) When the drum 41 is driven and the first rope 61 is wound up, the cable drum unit 50 moves toward the drum 41 side. Also, a second rope 62 is unwound from the drum 41.

(2) As the cable drum unit 50 moves, the traveling body 30 is also pulled toward the drum 41 by the third rope 63 and runs. At this time, the cable drum unit 50
The moving distance is 1/2 of the traveling distance of the traveling body 30.

■Driving the drum in the opposite direction to the above, the second row 162
When the rope is wound up, the traveling body 30 is pulled and runs in the opposite direction, and the first rope 61 is unwound.

(2) As the traveling body 30 travels, the cable drum unit 50 is pulled by the third rope 63.

■Each rope 61.6 generated while the traveling body 30 is running.
The tension change of 2.63 is absorbed by the air cylinder 64, and the rope tension is always kept constant.

(2) Since the cable holding means 70 operates as described above, the rollers 71 hold the cable 56 without interfering with the running of the traveling body 30.

In this embodiment, by using the rope pulling mechanism, cable drum unit, and cable holding means as described above, the conventional running distance was limited to 4 to 5II+, but the running distance was reduced to within the same clean room size limit. It became possible to extend the length up to 20 meters at once.

Regarding the cable drum unit 50 shown in this embodiment, the sheave that winds the first and second ropes that drive the traveling body around the cable drum and winds the cable around the axis of the cable drum may be referred to as the cable drum. It can be operated in the same manner as described above by winding the cable around the sheep so that it can rotate.

Furthermore, compared to the width perpendicular to the running direction of a conventional self-propelled trolley, the width of this device in the longitudinal direction can be made approximately 172 mm, so the area required for the running body and power supply is smaller than that of the conventional self-propelled trolley. can be made extremely small. Furthermore, since the device of the present invention does not have cables hanging down, it is possible to reduce the height of the device, and space can be used more effectively.

<Effects of the Invention> As explained above, since the device of the present invention pulls the traveling body with a rope via the cable drum unit, it is not as heavy as in the case of a cable conveyor, and it is less likely to shift than in the case of a curtain type cable. In addition to solving this problem, the cable holding function allows the cable to be held compactly and safely even if the traveling body travels a long distance.In addition, the compact device of the present invention can be used in a clean room. By implementing this method, the volume of the clean room building can be reduced, which can greatly contribute to reducing the cost of the equipment as a whole.

[Brief explanation of drawings]

FIG. 1 shows the configuration of the device of the present invention, (a) is a plan view, (a) is a plan view, (
b) is a front view, (c) is a side view, Fig. 2 is an explanatory diagram showing how to hang a rope in the device of the present invention, Fig. 3 is an external perspective view of the device of the present invention with a part omitted, and Fig. 4 The figures show a cable drum, (a) is a sectional view, (b) is a side view, and FIG. 5 is an explanatory diagram of the operation of the cable holding means.
b) shows the time when the roller escapes. 10... Device of the present invention 20... Running path 30... Running body 41... Drum 50... Cable drum unit 51... First rope sheave 52... Second rope sheave 53... Third rope sheave 54...First rope drum 55...Second rope drum 56...Cable 61...First rope 62...Second rope 63...Third rope Rope 64... Rope tensioning means 70... Cable holding means 71... Loaf 72... Air cylinder 73, 74... Sensor patent applicant Hitachi Kiden Kogyo Co., Ltd. Agent Patent attorney Takashi Onishi Figure 1 (f 2)

Claims (1)

[Claims] (1) A power supply device for a traveling body running on a running path installed on the floor, which includes a drum fixed to one end of the running path and driving first and second ropes, and a motor that rotates the drum. A first wheel movably provided between the drum and the traveling body.
a cable unit comprising a first rope sheave for guiding a rope, a third rope sheave for guiding a third rope, and a cable drum for guiding a power supply line; and rope tensioning means for tensioning one end of the rope. and the front end of the first rope is fixed to the drum or the second rope, the rear end is fixed to the drum side running road end via the first rope sheave, and the second rope is fixed to the drum or the second rope. The front end is connected to the drum or the first rope, the rear end is connected to the running body via a second rope sheave fixed to the other end of the running path, and the tip of the power supply line is connected to the running body and 1. A power supply device for a traveling body, the rear end of which is fixed substantially at the center of a traveling path via a cable drum.