JP3189427U - Presence / absence detection system for carts during cargo handling operations - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly durable system capable of accurately detecting the presence or absence of a transport vehicle performing cargo handling work on a slope carriage having a traveling function. SOLUTION: This system detects the presence or absence of a transport vehicle performing cargo handling work on a slope carriage 18 having a traveling function, and is arranged on a side portion of the slope carriage 18 at intervals in the traveling direction of the transport vehicle. , A transport vehicle exists on the slope carriage 18 based on a plurality of photoelectric sensors 21, 22, 23 for detecting a transport vehicle traveling on the slope carriage 18 and an ON / OFF pattern of the plurality of photoelectric sensors 21, 22, 23. The control device 24 for determining whether or not to perform the operation and the touch panel 25 for displaying the determination result by the control device 24 are provided. [Selection diagram] Fig. 5

Description

  The present invention relates to a system for detecting the presence or absence of a transport vehicle performing a cargo handling operation on a slope carriage having a traveling function.

It is possible to efficiently load bulk materials such as ore, coal, limestone, etc., transported to a wharf such as a dump truck to a wharf with a relatively small space, and can be efficiently loaded on a transport ship berthed at the wharf. A bulk shipping facility has been developed that does not require the use of
This bulk shipping facility is equipped with a loader that loads the bulk material that has been transported to the wharf by a transporter vehicle, and travels with the loader connected to the loader. And a slope carriage that serves as a loading / unloading path for the transporter when transporting an object.

  A truck loaded with loose materials climbs up the slope carriage in the back and puts the bulk material into the hopper provided in the loader. Since this slope cart has a traveling function, when moving the slope cart or jacking up or down the slope cart, make sure in advance that there is no transport vehicle on the slope cart. It is necessary to keep. At this time, it is desirable that the slope cart is provided with a system for detecting the presence / absence of a transporting vehicle during loading / unloading work so that an operator in the cab can easily check the presence / absence of the transporting vehicle during loading / unloading work.

  On the other hand, a loop coil type vehicle detector that detects a vehicle by embedding a loop coil, in which an electric wire is wound in a loop shape, in a road surface in order to detect the parking or presence of the vehicle is conventionally known. When a current is passed through the loop coil, a magnetic field is generated. When a vehicle is present in the magnetic field, the inductance of the loop coil changes. The loop coil type vehicle detector detects the presence or absence of the vehicle by detecting the inductance change of the loop coil.

For example, in Patent Document 1, the entire vehicle detection body configured as a unit type is formed in a circular or square flat cover body shape or lid plate shape, on the inner bottom surface of the vehicle detection body, on the outer periphery of the bottom surface. A loop coil type vehicle detector is disclosed in which a loop coil mounting portion is provided along the loop coil, and the loop coil is routed and fixed to the mounting portion.
Moreover, in Patent Document 2, a synthetic loop flexible electric wire pipe having a predetermined length is bent and formed in a substantially C shape, and is connected in communication between both ends of the main loop coil tube. A vehicle detection loop coil unit is disclosed that uses a T-shaped connection pipe that can be used to form a loop coil tube for wiring through which a loop coil is inserted.

JP 2004-295513 A JP 2006-72437 A

  The loop coil type vehicle detector determines that the vehicle is present when the inductance change amount of the loop coil is equal to or greater than a certain value (threshold value). If the threshold is set low, false detection of detecting metal objects other than vehicles as vehicles will occur. On the other hand, if the threshold is set high, there will be undetected cases in which vehicles with a small amount of metal or vehicles with a minimum ground clearance cannot be detected. To do. Therefore, in the loop coil type vehicle detector, the vehicle body metal amount and the minimum ground clearance greatly affect the vehicle detection performance.

  Further, when the vehicle passes through the road surface in which the loop coil is embedded, a shearing force due to a repeated load from the vehicle is generated in the loop coil. When this shearing force is large, the electric wire which comprises a loop coil may be disconnected, or the coating | cover which comprises the outermost part of a loop coil may be torn. When the electric wire is disconnected, it becomes impossible to detect the vehicle, and when the coating that forms the outermost part of the loop coil is broken, rainwater enters the loop coil from the portion where the coating is broken and the electric wire is corroded.

  The present invention has been made in view of such circumstances, and is to provide a highly durable system that can accurately detect the presence or absence of a transporting vehicle performing a cargo handling operation on a slope cart having a traveling function. Objective.

In order to achieve the above object, the present invention is a system for detecting the presence or absence of a transport vehicle performing a cargo handling operation on a slope cart having a traveling function,
Based on a plurality of photoelectric sensors that are arranged on the side of the slope carriage at intervals in the traveling direction of the carriage, and that detect the carriage traveling on the slope carriage, and ON / OFF patterns of the plurality of photoelectric sensors And a control device that determines whether or not a transport vehicle is present on the slope carriage, and a touch panel that displays a determination result by the control device.

In the system for detecting the presence / absence of a transport vehicle during loading / unloading work according to the present invention, the ON / OFF state of the photoelectric sensors arranged on the slope carriage and the ON / OFF sequence of each photoelectric sensor are spaced in the traveling direction of the transport vehicle. Based on this, it is determined whether or not there is a transport vehicle on the slope carriage, so that it is possible to accurately detect the presence or absence of the transport vehicle during cargo handling work without being affected by the amount of vehicle body metal or the minimum ground clearance.
Moreover, since the photoelectric sensor is arrange | positioned at the side part of the slope trolley | bogie, there is no possibility that a component apparatus may deteriorate by driving | running | working of a transport vehicle.

In the system for detecting the presence / absence of a transport vehicle during cargo handling work according to the present invention, the control device may include a latch relay that holds the determination result.
In this configuration, since the control device includes a latch relay that holds the determination result, the determination result is not lost even if an unexpected situation such as a power failure occurs.

In the system for detecting the presence / absence of a transport vehicle during cargo handling work according to the present invention, the control device may include a reset button for clearing the stored determination result.
According to this configuration, when there is no need to hold the judgment result, such as when the slope carriage has been stopped for a long time or when the photoelectric sensor has failed, the judgment held in the control device by pressing the reset button The result can be cleared.

  In the system for detecting the presence or absence of a transport vehicle during loading and unloading work according to the present invention, the system is arranged on the slope cart based on the ON / OFF patterns of a plurality of photoelectric sensors arranged on the side of the slope cart at intervals in the traveling direction of the transport vehicle. Since it is determined whether or not the transport vehicle exists, it is possible to accurately detect the presence or absence of the transport vehicle during the cargo handling operation and to achieve high durability.

1 is a layout diagram of a bulk shipping facility including a slope carriage equipped with a system for detecting the presence / absence of a transport vehicle during cargo handling work according to an embodiment of the present invention. It is the elevation which looked at the slope cart from the south side. It is a top view of the slope car lower part. It is sectional drawing when the traveling apparatus of the slope cart is cut | disconnected in the east-west direction. [BRIEF DESCRIPTION OF THE DRAWINGS] It is a block diagram of the presence-absence detection system of the conveyance vehicle during cargo handling work which concerns on one embodiment of this invention. (A) is a front view of a photoelectric sensor, (B) is a side view of a photoelectric sensor.

  Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.

  FIG. 1 is a layout diagram of a bulk shipping facility 10 including a slope carriage 18 equipped with a system for detecting the presence or absence of a transport vehicle during cargo handling work according to an embodiment of the present invention. In the present embodiment, the pier 11 having a relatively small space will be described by taking a jetty elongated in the east-west direction as shown in FIG. 1 as an example. For convenience of explanation, the side where the carrier ship 14 berths as viewed from the bulk shipping facility 10 is north (PN), the pier side of the wharf 11 is east, and the base side is west.

Tracks 12 (rails) extending in the longitudinal direction (east-west direction) of the wharf 11 are laid on both sides of the wharf 11 in the width direction (north-south direction). The bulk shipping facility 10 includes a loader 15 that self-propels on a pair of tracks 12 laid on the wharf 11, and a slope carriage that is connected to the loader 15 and travels on the wharf 11 together with the loader 15. 18.
The loader 15 is a facility for loading the bulk material that has been transported to the wharf 11 by a transporter 13 such as a dump truck onto the transporter 14. In addition, the slope carriage 18 is a facility that serves as a carry-in / out path for the transport vehicle 13 when transferring bulk materials from the transport vehicle 13 to the loader 15. Bulk materials are granulated slag, ore, coal, limestone, etc., stacked in the yard.

As shown in FIG. 2, the slope carriage 18 includes a slope 43 on which the transport vehicle 13 travels and a stage 44 provided on the top of the slope 43, and the travel direction of the transport vehicle 13 is the longitudinal direction of the wharf 11. It is arrange | positioned at the wharf 11 so that it may become. In the present embodiment, slope carts 18 are respectively connected to both sides in the longitudinal direction (east side and west side) of the wharf 11 across the loading machine 15, so that bulk goods can be carried in from both sides of the loading machine 15. (See FIG. 1).
The stage 44 side of the slope carriage 18 is the front side of the slope carriage 18, and the opposite side is the rear side of the slope carriage 18.

  The loader 15 includes a transport conveyor (not shown) that transports the bulk material upward, and a loader body 16 that includes a boom conveyor 20 that transports the bulk material transported by the transport conveyor into the transport ship 14, and a stage. A hopper cart that includes a hopper 42 that temporarily stores loose materials dropped from the transport vehicle 13 that is stopped at 44 and that is connected to the loader body 16 and travels on the wharf 11 together with the loader body 16. 17 (see FIGS. 1 and 2). In addition, a cab 19 for operating the loader body 16 is provided at the top of the loader 15.

As shown in FIG. 3, two traveling devices 60 driven by an electric motor 65 are attached to the slope carriage 18 at the front and two at the rear. Each traveling device 60 can be rotated in a horizontal plane. The two traveling devices 60 at the front part and the two traveling devices 60 at the rear part are connected by a connecting rod 66, and the steering cylinder 61 is moved forward. It is attached to one traveling device 60 of the part and one traveling device 60 of the rear part. When the steering cylinder 61 is expanded and contracted to change the direction of one traveling device 60, the direction of the other traveling device 60 is the same as that of the one traveling device 60 via the connecting rod 66.
Further, as shown in FIG. 4, each traveling device 60 includes a jack-up cylinder 62 for raising and lowering the tire 67 and a pair of locking cylinders 63 for preventing the jacked-up tire 67 from being jacked down. Equipped. When jacking up the tire 67, the cylinder rod of the jackup cylinder 62 is retracted (raised), the shaft 64 holding the main shaft of the tire 67 is moved upward, and the shaft 64 is moved by the pair of locking cylinders 63. From the side.

  Since the slope carriage 18 has a traveling function, it is necessary not to move the slope carriage 18 while the transport vehicle 13 is placed on the slope carriage 18. For this reason, the slope carriage 18 is equipped with a system that allows an operator in the cab 19 to easily confirm the presence or absence of the transport vehicle 13 that is performing a cargo handling operation on the slope carriage 18.

As shown in FIG. 5, the presence / absence detection system for a cart during cargo handling work according to an embodiment of the present invention includes a plurality of photoelectric sensors 21, 22, 23 arranged on the side of the slope carriage 18, and a plurality of photoelectric sensors 21, 22, 23. Based on the ON / OFF pattern of the photoelectric sensors 21, 22, and 23, a schematic configuration includes a control device 24 that determines whether the transport vehicle 13 exists on the slope carriage 18 and a touch panel 25 that displays a determination result by the control device 24. Is done.
In addition, the touch panel 25 is arrange | positioned in the cab 19 provided in the upper part of the loading machine 15. FIG. Thereby, the operator in the cab 19 can easily confirm the presence / absence of the transport vehicle 13 that is performing the cargo handling work from a remote position.

  A plurality (three in the present embodiment) of photoelectric sensors 21, 22, and 23 are installed at one side end portion of the slope carriage 18 at intervals in the traveling direction of the transport vehicle 13. Specifically, a photoelectric sensor A21 and a photoelectric sensor B22 are installed at the rear part of the slope carriage 18 (the rear part of the slope 43). The photoelectric sensor A21 is installed on the carry-in / out entrance side of the transport vehicle 13, and the photoelectric sensor B22 is installed on the stage 44 side at a distance from the photoelectric sensor A21. A photoelectric sensor C23 is installed at the front end of the slope carriage 18 (front end of the stage 44).

The photoelectric sensor includes a light projecting unit that emits light and a light receiving unit that receives the irradiated light. When the irradiated light is blocked or reflected by the detection object, the amount of light reaching the light receiving unit changes. The light receiving unit detects this change, converts it into an electrical signal, and outputs it. Visible light or infrared light is used as the irradiation light.
Photoelectric sensors are capable of detecting almost any object (metal, glass, plastic, wood, liquid, etc.) and have a feature that the detection distance is long. In addition, the response speed is fast and highly accurate detection is possible.

In the present embodiment, a diffuse reflection type photoelectric sensor that is turned on / off when light from the light projecting unit hits a detection object and returns to the light receiving unit is used. The shape of the photoelectric sensor used is shown in FIGS. A light receiving unit 27 is provided at the upper front of the photoelectric sensor, and a light projecting unit 26 is provided at the lower front.
The photoelectric sensors 21, 22, and 23 are installed approximately 100 mm above the floor surface of the slope carriage 18 (see FIG. 2). Infrared rays irradiated from the light projecting unit 26 of the photoelectric sensors 21, 22, and 23 hit the tire 13 a of the transport vehicle 13 that passes through the slope carriage 18 and are reflected. When the reflected infrared rays reach the light receiving portions 27 of the photoelectric sensors 21, 22, and 23, the transport vehicle 13 is detected.

The control device 24 controls the ON / OFF patterns of the photoelectric sensor A21, the photoelectric sensor B22, and the photoelectric sensor C23, that is, the ON / OFF state of the photoelectric sensor A21, the photoelectric sensor B22, and the photoelectric sensor C23, and the photoelectric sensor A21 and the photoelectric sensor B22. Based on the order of ON / OFF of the photoelectric sensor C23, it is determined whether or not the transport vehicle 13 exists on the slope carriage 18. Specifically, the following ON / OFF patterns can be considered.
a) When any of the photoelectric sensor A21, the photoelectric sensor B22, and the photoelectric sensor C23 is in the ON state: It is determined that the transport vehicle 13 is present on the slope carriage 18.
b) When all of the photoelectric sensor A21, the photoelectric sensor B22, and the photoelectric sensor C23 are in the OFF state and are turned on in the order of the photoelectric sensor A21 and the photoelectric sensor B22, it is determined that the transport vehicle 13 is present on the slope carriage 18.
c) When all of the photoelectric sensor A21, the photoelectric sensor B22, and the photoelectric sensor C23 are in an OFF state and are turned ON in the order of the photoelectric sensor B22 and the photoelectric sensor A21, it is determined that there is no transport vehicle 13 on the slope carriage 18.

  The order in which the photoelectric sensor A21 and the photoelectric sensor B22 are turned on is stored in the control device 24, and the previous storage is reset when the order changes. That is, the memory that has been turned on in the order of photoelectric sensor A21 and photoelectric sensor B22 is reset when photoelectric sensor B22 and photoelectric sensor A21 are turned on in this order, and the memory that has been turned on in order of photoelectric sensor B22 and photoelectric sensor A21. Is reset when the photoelectric sensor A21 and the photoelectric sensor B22 are turned on in this order.

Note that the control device 24 includes a latch relay (not shown) that holds a determination result even when an unexpected situation such as a power failure occurs, and a reset button (not shown) that clears the held determination result. Yes.
When the exciting current is supplied to the coil, the latch relay switches from the open state to the closed state or from the closed state to the open state, and then the closed state or the open state even if no exciting current is supplied to the coil. Hold.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the configuration described in the above-described embodiment, and the scope of matters described in the claims of the utility model registration Other embodiments and modifications conceivable in the above are also included. For example, in the above embodiment, three photoelectric sensors are used, but two or four or more sensors may be used. Moreover, in the said embodiment, although the diffuse reflection type photoelectric sensor is used, you may use other types of photoelectric sensors, such as a transmission type and a regression reflection type.

10: Bulk equipment, 11: Wharf, 12: Track (rail), 13: Carrier, 13a: Tire, 14: Carrier, 15: Loading machine, 16: Main body of loading machine, 17: Hopper truck, 18: slope cart, 19: cab, 20: boom conveyor, 21: photoelectric sensor A (photoelectric sensor), 22: photoelectric sensor B (photoelectric sensor), 23: photoelectric sensor C (photoelectric sensor), 24: control device, 25: Touch panel, 26: Light projecting unit, 27: Light receiving unit, 42: Hopper, 43: Slope, 44: Stage, 60: Traveling device, 61: Steering cylinder, 62: Jack-up cylinder, 63: Locking cylinder, 64: shaft, 65: electric motor, 66: connecting rod, 67: tire

Claims (3)

A system for detecting the presence or absence of a transport vehicle performing a cargo handling operation on a slope carriage having a traveling function,
Based on a plurality of photoelectric sensors that are arranged on the side of the slope carriage at intervals in the traveling direction of the carriage, and that detect the carriage traveling on the slope carriage, and ON / OFF patterns of the plurality of photoelectric sensors And a control device for determining whether a transport vehicle is present on the slope carriage, and a touch panel for displaying a determination result by the control device.   The system for detecting the presence or absence of a transporting vehicle during cargo handling work according to claim 1, wherein the control device includes a latch relay that holds the determination result.   3. The system for detecting the presence or absence of a transporting vehicle during loading / unloading work according to claim 2, wherein the control device includes a reset button for clearing the determination result held therein. system.

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