JP2023042178A - Scattering prevention device with open/closed state detection device - Google Patents

Abstract

To provide means for preventing an operator driving a dump truck from driving the dump truck with a body part 2 of a scattering prevention device opened outward from both side walls of a load carrying platform because of forgetting knocking down the body part inside the load carrying platform.SOLUTION: A scattering prevention device including a pair of body parts 2 installed at an upper ends of both side walls of a load carrying platform is provided. The scattering prevention device includes an open/closed state detection device 4 of the body parts 2 and alarm means, and issues an alarm to an operator in the case that the body parts 2 are open outward from both side walls of the load carrying platform when a dump truck is started to travel.SELECTED DRAWING: Figure 3

Description

The present invention relates to installing an open/closed state detection device in a scattering prevention device that is attached to the bed of a dump truck that transports earth and sand and prevents the earth and sand loaded on the dump truck from scattering from the bed.

FIG. 1 shows an outline of the anti-scattering device employed in the present invention. Dump trucks for transporting earth and sand generally have anti-scattering devices attached to both side walls 1 of the platform in order to prevent the loaded earth and sand from scattering from the platform.
In this anti-scattering device, a pair of main body portions 2 each having a ladder-like frame member and resin sheets spread out are installed along the upper edges of both side walls 1 . A pair of shafts 3a and 3b protrude in the longitudinal direction of the dump truck along the extension of the long side from the frame member forming the long side in contact with the side wall 1 of the main body 2, near both ends of the side wall 1. supported by a pair of bearings (not shown) fixed to the

The pair of body portions 2 can be tilted inwardly and outwardly of the side walls 1 with the shafts 3a and 3b as central axes by driving means provided in the bearings or manually. FIG. 1 shows a state in which the body portion 2 is laid down inside the side wall 1 after the earth and sand are loaded. In this way, by running while keeping the body portion 2 tilted inward, it is possible to prevent earth and sand from falling or scattering during transportation (Patent Document 1).
Therefore, the conventional anti-scattering device is composed of the main body 2, shafts 3a and 3b, bearings, and drive means for opening and closing the main body 2 as required. This anti-scattering device is called Cobolane (registered trademark), for example, and is widely used in dump trucks that transport earth and sand.

FIG. 2 shows a state in which the main body portion 2 is inclined to the outside of the side wall 1. As shown in FIG. When a heavy machine such as a power shovel is used to load earth and sand onto a loading platform, the pair of main bodies 2 are usually inclined outward from the respective side walls 1 so as not to interfere with the stacking.
Then, when the loading is completed and the dump truck starts traveling, the pair of main body parts 2 are tilted inside the loading platform to prevent the earth and sand on the loading platform from dropping or scattering from both side walls.

In this way, the main body 2 projects outward from the side walls 1 of the loading platform while the cargo is being loaded, and when the dump truck travels after loading the cargo, the main body 2 is tilted to the inside of the loading platform. It is used. However, due to carelessness of workers, there have sometimes been cases where the operation of the dump truck is started with the main body 2 open outward from the side walls 1 of the loading platform.
When the dump truck travels on the road in such a state, not only is it dangerous in relation to other traveling vehicles, but also the main body 2 projecting outward comes into contact with and destroys the toll gate booth of the expressway. A fatal accident occurred.

JP-A-2009-29232

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an object of the present invention is to prevent the above-described accidents from occurring. That is, to provide a means for preventing a worker who drives a dump truck from forgetting to put down the body part 2 to the inside of the loading platform and running the dump truck in a state of projecting outward from both side walls 1 of the loading platform. It is an object.

In order to achieve the above object, the invention described in claim 1 is a scattering prevention device comprising a pair of body portions 2 installed on the upper edge of both side walls 1 of a cargo bed, wherein the opening and closing state detection device of the body portion 2 and an alarm A device is provided to detect the open/closed state of the main body 2 when the dump truck starts traveling, and to issue an alarm to the worker when the main body 2 is open outward from the side walls 1 of the loading platform. It is characterized by comprising:

The invention according to claim 2 is characterized in that, in the invention according to claim 1, the opening/closing state detection device of the main body 2 is based on magnetic detection means. It consists of a magnetic body provided and a magnetic sensor provided on the side wall of the loading platform.

The invention according to claim 4 is characterized in that, in the invention according to claim 1, the opening/closing state detection device of the main body 2 is electromechanical contact means. It consists of a pressing member provided and a switch device provided on the side wall of the loading platform.

The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein the alarm device is a buzzer that emits an alarm sound and/or a light that emits light including flashing light. characterized by

According to the configuration of the present invention, even if the worker forgets to tilt the main body 2 to the inside of the loading platform after loading the cargo, at the stage when the worker tries to move the dump truck, Since a warning is issued to the operator, it is possible to prevent accidents caused by traveling with the main body 2 open outward from both side walls of the loading platform.

1 shows a state in which the body portion 2 of the anti-scattering device of the present invention is laid down inside the side wall 1. FIG. 1 shows a state in which the body portion 2 of the anti-scattering device of the present invention is inclined to the outside of the side wall 1. FIG. It is a conceptual diagram of the magnetic detection type opening and closing detection device 4, (a) is the state where the switch is off because the main body 2 of the scattering prevention device is upright, and (b) is the main body 2 on both sides of the loading platform. Since the wall 1 is open to the outside, the magnetic sensor 6 responds to the magnetic body 5 to indicate a state in which the switch is turned on. It is a conceptual diagram of the electromechanical contact type opening and closing detection device 4, (a) is the switch is off because the main body 2 of the scattering prevention device is upright, and (b) is the main body 2 on both sides of the loading platform. Since the wall 1 is open outward, the pressing member 7 presses the switch of the switch device 8 to turn on the switch. It is an electric wiring diagram adopted in the present invention, and has an open/closed state detection device 4. FIG.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

(open/close state detector)
The anti-scattering device of the present invention has an opening/closing state detection device 4 for the main body 2 and an alarm device in addition to the configuration of the conventional anti-scattering device described above. The open/closed state detection device 4 is installed in connection with the shaft 3a in FIG. As this detection means, specifically, magnetic detection means using a magnet or electromechanical contact means using a switch can be used. Furthermore, the open/closed state of the main body 2 may be detected using light, radio waves, or sound waves.
Below, the magnetic detection means and the electromechanical contact means will be described in detail.

(Magnetic detection means)
FIG. 3 is a conceptual diagram showing the contents of the magnetic detection means.
As shown in FIG. 3, a magnetic body 5 is fixed to a portion of the shaft 3a so as to cover the substantially semicircular portion of the shaft 3a, and a magnetic sensor 6 is installed on the side wall of the cargo bed. When the main body 2 of the anti-scattering device stands up vertically or falls inside the side walls 1, the magnetic body 5 is separated from the magnetic sensor 6 as shown in FIG. 3(a). Therefore, the magnetic sensor 6 does not react. However, as shown in FIG. 3(b), when the main body 2 is open outward from the side walls 1 of the loading platform, the magnetic material covering the substantially semicircular portion of the shaft 3a is the magnetic sensor. 6, the magnetic sensor 6 responds to the magnetism of the magnetic body 5 and generates an electric output. If the dump truck starts running in this state, an alarm is issued to the worker who is the driver.

(mechanical contact means)
FIG. 4 is a conceptual diagram showing the contents of the electromechanical contact means.
A pressing member 7 is fixed to the shaft 3a so as to cover the substantially semicircular portion of the shaft 3a, and a switch device 8 is installed below the pressing member 7. As shown in FIG. When the main body 2 of the anti-scattering device stands up vertically or falls inside the side walls 1, the pressing member 7 is separated from the switch device 8 as shown in FIG. 4(a). so the switch is not pressed. However, as shown in FIG. 4(b), when the main body 1 is open outward from the side walls 1 of the loading platform, the pressing member 7 covering the substantially semicircular portion of the shaft 3a is not in contact with the switch device. 8 is approached to depress the switch to generate an electrical output. When the dump truck starts running in this state, an alarm is issued to the worker who is the driver.

(alarm device)
The warning device informs the driver that the dump truck will start traveling while the body 1 of the anti-scattering device is open to the outside of both sides 1 of the loading platform. An alarm is issued by intermittent sounding of a warning sound or flashing of a light. By contacting this alarm, the driver perceives that the main body part 2 remains opened outward from the side walls 1 of the cargo bed, and can lay down the main body part 2 into the cargo bed.
The warning is given by emitting a warning sound from a buzzer installed at an appropriate position in the driver's seat and/or emitting light including flashing light from a light installed at a position easily visible to the driver.

(Electric wiring)
FIG. 5 shows an electrical wiring diagram of the scattering prevention device employed in the present invention. 4 is an open/closed state detection device for the main body 2, which can be composed of the above-described magnetic detection means or electromechanical contact means.
When the body 2 of the anti-scattering device is tilted to the outside of the side walls 1, the switch of the open/closed state detector 4 is on. In that state, when the ignition switch is turned on to start the engine of the dump truck, an electric circuit is opened, a warning sound is emitted from the buzzer and/or a flashing light is emitted from the light, and the main body 2 is positioned on both side walls for the driver. It warns that it is in an open state outside of 1. Upon receiving this warning, the driver can tilt the body portion 2 toward the inside of the side walls 1.例文帳に追加

In addition, the application of the present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the technical ideas described in the claims, the specification, and the drawings. is of course.

REFERENCE SIGNS LIST 1 side wall of loading platform 2 main body of scattering prevention device 3a, 3b shaft 4 open/closed state detector 5 magnetic body 6 magnetic sensor 7 pressing member 8 switch device

Claims (6)

A scattering prevention device comprising a pair of main bodies installed on the upper edges of both side walls of a cargo bed, comprising an open/closed state detection device and an alarm device for the main bodies, and detecting the open/closed state of the main bodies when the dump truck starts traveling. and, when the main body is open outward from both side walls of the cargo bed, an alarm is issued. 2. The anti-scattering device according to claim 1, wherein said opening/closing state detection device is based on magnetic detection means. 3. The anti-scattering device according to claim 2, wherein said magnetic detection means comprises a magnetic body provided on the shaft of said main body and a magnetic sensor provided on a side wall of said loading platform. 2. The anti-scattering device according to claim 1, wherein said open/close state detecting device is electromechanical contact means. 5. The anti-scattering device according to claim 4, wherein the electromechanical contact means comprises a pressing member provided on the shaft of the main body and a switch device provided on a side wall of the cargo bed. The scattering prevention device according to any one of claims 1 to 5, wherein the alarm device is a buzzer that emits an alarm sound and/or a light that emits light including flashing light.

Images