Anti-scattering device equipped with an open / close state detection device

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

[Technical Field]

[0001] The present invention relates to the installation of 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, etc., and prevents earth and sand, etc. loaded on the dump truck, from scattering from the bed. [Background technology]

[0002] Fig. 1 shows an outline of the anti-scattering device employed in the present invention. In general, in dump trucks that transport earth and sand, etc., anti-scattering devices are attached to both side walls 1 of the loading platform to prevent the loaded earth and sand from scattering from the loading platform. In this anti-scattering device, a pair of main bodies 2, each consisting of a ladder-shaped frame member with a resin sheet stretched over it, are installed along the upper edges of both side walls 1. A pair of shafts 3a, 3b protrude from the frame member that forms the long side of the main body 2 that contacts the side wall 1 in the longitudinal direction of the dump truck along the extension of that long side, and are supported by a pair of bearings (not shown) fixed near both ends of the side wall 1.

[0003] The pair of main bodies 2 can be tilted inward and outward of the side walls 1 around the shafts 3a, 3b as a central axis by a driving means provided in the bearings or manually. Figure 1 shows the main bodies 2 tilted inward of the side walls 1 after being loaded with earth and sand. By traveling with the main bodies 2 tilted inward in this way, it is possible to prevent earth and sand from falling or scattering during transportation (Patent Document 1). Therefore, a conventional anti-scattering device is composed of a main body 2, shafts 3a and 3b, bearings, and a drive means for opening and closing the main body 2 as needed. This type of anti-scattering device is called, for example, Coborane (registered trademark), and is widely used in dump trucks that transport earth and sand.

[0004] 2 shows a state in which the main body 2 is tilted outward from the side wall 1. When loading earth and sand onto a loading platform using heavy machinery such as a power shovel, the pair of main body parts 2 are usually tilted outward from their respective side walls 1 so as not to interfere with the stacking. When loading is completed and the dump truck is ready to travel, the pair of main body parts 2 are folded inward toward the inside of the loading platform to prevent soil and sand on the loading platform from falling or scattering from the side walls.

[0005] In this way, the main body 2 opens and projects outward from both side walls 1 of the loading platform while cargo is being loaded, and when the loading of cargo is finished and the dump truck is about to start moving, it is folded down toward the inside of the loading platform. However, due to carelessness on the part of workers, there have been occasional cases where the dump truck has started moving with the main body 2 still open and facing outward from both side walls 1 of the loading platform. If a dump truck were to travel on a road in this state, not only would it be dangerous in relation to other vehicles, but there was also the possibility of the outward-extending main body 2 coming into contact with a toll booth on the expressway and destroying it. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-29232 Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention was made in view of the current situation and aims to prevent the above-mentioned accidents from occurring. That is, the present invention aims to provide a means to prevent the dump truck driver from forgetting to tilt the main body 2 inward of the loading platform and running the dump truck with the main body 2 protruding outward from both side walls 1 of the loading platform. [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, the invention described in claim 1 is characterized in that the anti-scattering device has a pair of main body parts 2 installed on the upper edges of both side walls 1 of the loading platform, and is equipped with an open / closed state detection device for the main body parts 2 and an alarm device, which detects the open / closed state of the main body parts 2 when the dump truck starts to move, and if the main body parts 2 are open outward from both side walls 1 of the loading platform, issues an alarm to the worker.

[0009] The invention described in claim 2 is characterized in that, in the invention described in claim 1, the open / closed state detection device of the main body part 2 is a magnetic detection means, and specifically, consists of a magnetic body provided on the shaft of the main body part and a magnetic sensor provided on the side wall of the loading platform.

[0010] The invention described in claim 4 is characterized in that, in the invention described in claim 1, the open / closed state detection device of the main body part 2 is made of a mechanical / electrical contact means, and specifically, it consists of a pressing member provided on the shaft of the main body part and a switch device provided on the side wall of the loading platform.

[0011] The invention described in claim 6 is characterized in that, in the invention described in any one of claims 1 to 5, the alarm device is a buzzer that emits an alarm sound and / or a light that emits light including a flashing light. [Effects of the Invention]

[0012] According to the configuration of the present invention, even if a worker forgets to tilt the main body 2 inward toward the loading platform after loading the cargo, an alarm is sounded to the worker when he or she attempts to drive the dump truck, thereby preventing accidents that may result from the main body 2 being driven with the main body 2 open toward the outside from both side walls of the loading platform. [Brief explanation of the drawings]

[0013] [Figure 1] 1 shows a state in which the main body 2 of the anti-scattering device of the present invention is laid down inside the side wall 1. [Figure 2]1 shows a state in which the main body 2 of the anti-scattering device of the present invention is tilted outward from the side wall 1. [Figure 3] This is a conceptual diagram of a magnetic detection type open / close detection device 4. (a) shows the state in which the switch is off because the main body 2 of the anti-scattering device is upright, and (b) shows the state in which the main body 2 is open outward from both side walls 1 of the loading platform, so the magnetic sensor 6 reacts to the magnetic material 5 and the switch is on. [Figure 4] 1 is a conceptual diagram of a mechanical-electrical contact type open / close detection device 4, in which (a) shows the state in which the main body 2 of the anti-scattering device is upright and the switch is in the off state, and (b) shows the state in which the main body 2 is open outward from both side walls 1 of the loading platform and the pressing member 7 presses the switch of the switch device 8, turning the switch on. [Figure 5] 1 is an electrical wiring diagram used in the present invention, which includes an open / closed state detection device 4. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

[0015] (Open / close state detection device) The scattering prevention device of the present invention includes, in addition to the configuration of the conventional scattering prevention device described above, a device 4 for detecting the open / closed state of the main body 2 and an alarm device. This open / closed state detection device 4 is installed by connecting it to the shaft 3a in FIG. 1. Specifically, this detection means may be a magnetic detection means using a magnet or an electromechanical contact means using a switch. Furthermore, the open / closed state of the main body 2 may be detected using light, radio waves, or sound waves. The magnetic detection means and electromechanical contact means will be described in detail below.

[0016] (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 approximately semicircular portion of the shaft 3a, and a magnetic sensor 6 is installed on the side wall of the loading platform. When the main body 2 of the anti-scattering device is upright or tilted inside the side walls 1, as shown in FIG. 3(a), the magnetic body 5 is separated from the magnetic sensor 6, and the magnetic sensor 6 does not react. However, when the main body 2 is open outward from the side walls 1 of the loading platform as shown in FIG. 3(b), the magnetic body covering the approximately semicircular portion of the shaft 3a approaches the magnetic sensor 6, and the magnetic sensor 6 reacts to the magnetism of the magnetic body 5 and generates an electrical output. If the dump truck starts moving in this state, an alarm is sounded to the driver, who is an operator.

[0017] (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 approximately semicircular portion of the shaft 3a, and a switch device 8 is installed below the pressing member 7. When the main body 2 of the anti-scattering device is upright or tilted inwardly between the side walls 1, as shown in FIG. 4(a), the pressing member 7 is separated from the switch device 8 and the switch is not pressed. However, when the main body 1 is open outwardly from the side walls 1 of the loading platform as shown in FIG. 4(b), the pressing member 7 covering the approximately semicircular portion of the shaft 3a approaches the switch device 8 and presses the switch, generating an electrical output. When the dump truck starts to move in this state, an alarm is sounded to the driver, who is an operator.

[0018] (Alarm device) The warning device notifies the driver that the dump truck will start moving if the main body 1 of the anti-scattering device remains open to the outside of both side walls 1 of the loading platform. The warning is issued by an intermittent warning sound and a flashing light. When the driver hears this warning, he or she will realize that the main body 2 of the anti-scattering device remains open to the outside of both side walls 1 of the loading platform, and can tilt the main body 2 into the loading platform. The warning is issued by emitting a warning sound from a buzzer installed in an appropriate position inside the driver's seat and / or by emitting a light, including a flashing light, from a light installed in a position that is easily visible to the driver.

[0019] (electrical wiring) FIG. 5 shows an electrical wiring diagram for the anti-scattering device employed in the present invention, in which 4 is a device for detecting the open / closed state of the main body 2, which can be constructed from the magnetic detection means or electromechanical contact means described above. When the main body 2 of the anti-scattering device is tilted outward from both side walls 1, the switch of the open / closed state detection device 4 is in the on state. In this state, when the ignition switch is turned on to start the dump truck engine, an electric circuit is opened, and a warning sound is emitted from the buzzer and / or a flashing light is emitted from the light, warning the driver that the main body 2 is in an open state outward from both side walls 1. Upon receiving this warning, the driver can tilt the main body 2 inward from both side walls 1.

[0020] Furthermore, the present invention is not limited to the application of the above-described embodiments, and it goes without saying that various modifications are possible within the scope of the claims and the technical ideas described in the specification and drawings. [Explanation of symbols]

[0021] 1 Side wall of the loading platform 2. Main body of the anti-scattering device 3a, 3b shaft 4. Open / close state detection device 5 Magnetic material 6 Magnetic Sensor 7 Pressing member 8 Switching Device

Claims

1. A scattering prevention device having a pair of main bodies installed on the upper edges of both side walls of a dump truck bed, the device comprising an open / closed state detection device for the main bodies and an alarm device, The open / closed state detection device is a magnetic detection means including a magnetic body provided on a shaft that rotates angularly together with the tilting movement of the main body, and a magnetic sensor provided on a side wall of the loading platform at a position facing the magnetic body when the main body is opened outward, The open / closed state detection device has an ignition switch for starting an engine of the dump truck, a switch of the open / closed state detection device that is turned on when the main body is opened outward from both side walls, and the alarm device, all connected in series to its electrical wiring, A scattering prevention device characterized in that when the ignition switch is closed to start the engine of the dump truck, the alarm device is activated when the main body opens outward from both side walls of the loading platform.

2. 2. The scattering prevention device according to claim 1, wherein the warning device is a buzzer that emits a warning sound and / or a light that emits light including a flashing light.

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