JPS5856718B2 - Tilt detection alarm device for crane trucks, etc. - Google Patents

Description

[Detailed Description of the Invention] The present invention provides that when a crane vehicle, a ladder work vehicle, etc. is installed for work, the vehicle body becomes unstable due to loosening of the ground at the installation location, overcurrent of the load, etc., resulting in a dangerous situation. This invention relates to a device that automatically detects and issues a notification when the vehicle is about to tilt.

Conventionally, the inclination of the vehicle body as described above has been known by directly observing the vehicle body with the human eye or by measuring it with a spirit level, etc., and then a warning or report has been issued.

In this way, monitoring and measuring with the human eye can result in erroneous readings or lack of caution, resulting in a lack of promptness in warnings and reports.
Therefore, there was a fear that workers etc. would be exposed to danger.

In view of these points, the present invention provides a device that automatically detects and notifies the inclination of the vehicle body as described above, and will be described in detail below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, in which a rod is connected to a lower part of a spherical part 3 of a rotary joint formed by a spherical part 3 fitted into a spherical recess 2 provided in an upper plate of a housing 1. A light source lamp 6, a light source battery 7, and a light source beam lens 8 for narrowing the light beam from the lamp 6 are installed in a hollow pendulum-shaped lower body 5 attached to the lower part of the rod 4 and a spherical shape. A switch 9 is inserted into the power supply wiring drawn out from the housing 1 through a hole provided through the section 3.

The pendulum-shaped hanging body 5 is supported by a rotary joint so that it can move in any direction on one plane.

10 is a housing 1 so that the center is vertically below the center of the lens 9 when the pendulum-shaped hanging body 5 is stationary and in a vertical position.
A mask plate is provided in the hole of the bottom plate so as to be parallel to the bottom surface of the bottom plate, and as shown in FIG. A section 12 is provided.

This mask plate 10 is placed horizontally so that the center of the light beam passing through the lens 8 coincides with the center of the light shielding part 12.

Further, when the mask plate 10 is attached to a vehicle body such as a crane truck, it is arranged to be parallel to the horizontal surface of the vehicle body.

Reference numeral 13 denotes a hood for preventing external light attached to the bottom plate of the housing 1, and a fisheye lens is provided at the lower part of the hood for condensing the light that passes through the mask plate 10 and enters directly or is reflected on the inner surface of the hood 13. 14, and at the lower end of the hood 13, at a distance 12 from the mask plate 10, there is provided a photoelectric conversion element 15 made of a phototransistor or the like that detects light and converts it into an electrical signal.

16 is an amplifier that amplifies the electrical signal from the photoelectric conversion element;
Reference numeral 17 indicates an alarm device such as an alarm buzzer or an indicator lamp.

The light shielding portion 12 of the mask plate 10 is designed to block light from the light source that has passed through the lens 8 when the inclination angle of the vehicle body and therefore the inclination of the mask plate 10 when attached to the vehicle body is within the safe range of the vehicle body inclination. size is selected.

Detection accuracy is for light source / distance 1 between lens 8 and mask plate 10
1 or by increasing the length of the pendulum.

Also, in order to eliminate the influence of external vibrations, the weight of the pendulum-shaped hanging body can be made equal to that of a dog.

Next, the operation of the apparatus of the present invention will be described. The device is attached to a vehicle body such as a crane truck placed at a required location so that the horizontal surface of the vehicle body is parallel to the mask plate 10 and the bottom plate of the housing 1.

While the inclination of the vehicle body is within the safe range, the light from the lamp 6 that passes through the lens 8 hits the light shielding part 12 of the mask plate 10, so that the light does not reach the photoelectric conversion element 15.

If the inclination of the vehicle body becomes thicker than the safe range, the relative position of the pendulum-shaped hanging body to the mask plate 10 will be, for example, the position shown by the dotted line in FIG. 1, and the light will pass through the transparent part of the mask plate 10. The light enters the fisheye lens 14 and reaches the photoelectric conversion element 15, which converts it into an electrical output signal.

This output signal is amplified by an amplifier and activates the alarm 17 to alert the user of a dangerous situation.

This allows workers on and around the vehicle to take corresponding actions or measures.

As described above, by using the device of the present invention, the tilting of the vehicle body toward a dangerous state is automatically detected as light, and this is converted into electrical output to operate the alarm device, so that workers can quickly and accurately You can have them report it to you.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a plan view of a mask plate. 5... Pendulum-shaped hanging body, 6... Light projector, 10... Mask plate, 12... Light shielding part of mask plate, 15... ...Photoelectric conversion element, 17.
...Alarm.

Claims (1)

[Claims] 1. A light projecting body is provided at the bottom of a pendulum-shaped hanging body that is suspended and supported so that it can freely move in all directions on a plane, and a light shielding part that blocks the light projected from the projecting body is placed below the projecting body in the center. A mask plate having a light-transmitting part formed around the light-shielding part is provided at a fixed position relative to the supporting part of the hanging body, and the light from the light projecting body transmitted through the mask plate is provided below the mask plate. 1. An inclination detection and notification device for a crane vehicle, etc., characterized in that it is provided with a photoelectric conversion element that detects projected light and converts it into an electric signal, and is provided with an alarm that is activated by the electric signal of the photoelectric conversion element.