JPH08188384A - Outrigger alarm device - Google Patents

Abstract

PURPOSE: To recognize that the rating load of a hanging baggage exceeds a specific set value, by outputting an alarm generating instruction signal from a controller to an alarm generator, by deciding that the signal from a load detector is the signal of the condition exceeding a specific load set value, by the controller. CONSTITUTION: A floor board 15 formed as a box is provided with an upper side plate 16 to be the footboard of the earth plate 14 of an outrigger 13 at the upper side part, and a bottom plate 17 at the lower side part thereof. A load detector 18 is provided at the lower side part of the upper side plate 16 of the floor board 15, and by deciding that the signal from the load detector 18 is the signal of the condition exceeding a specific load set value by a controller 19, an alarm generating instruction signal is output from the controller 19 to a buzzer 20 and a flusher unit 21. Consequently, it can be recognized that the rating load of a hanging baggage exceeds a specific set value, so as to improve the safety of the crane work.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to an outrigger alarm device for lifting an overload of a crane work vehicle such as a mobile crane.

[0002]

2. Description of the Related Art FIG. 5 is a plan view of a crane 1 described in Japanese Utility Model Laid-Open No. 6-63577. FIG. 6 is a sectional view of the grounding boards a, b, c, d in FIG. Figure 5
And in the crane 1 shown in FIG. 6, when the load 2 on the right side in the figure becomes excessive, a fall occurs about the bc line as a fulcrum, but at this time, there are gaps from the displacement sensor 3 at two locations a and d. (4) When the total amount exceeds the set value, the control means 5 issues a signal to activate the device that sounds the alarm buzzer 6 or shuts off the hydraulic circuit. You can know the risk of falling. In addition, in the grounding board a shown in FIG.
A base portion 7 having rigidity, and the base portion 7 and a predetermined gap 4
And a peripheral portion is provided with flexibility and is connected to the flexible portion 8.

[0003]

In an alarm device for a crane according to one embodiment of the prior art, a gap is formed inside the grounding board for the outrigger, and the amount of the gap which changes depending on the load is detected by a displacement sensor. . Therefore, it is difficult to provide a means for preventing the intrusion of muddy water into the gap and an internal rust preventive means. Further, since the displacement sensor is directly connected to the grounding board, there is a problem in durability maintenance and accuracy maintenance. An object of the present invention is to provide an alarm device for outriggers that can solve the above problems.

[0004]

According to the present invention, outriggers are extended to the left and right or front and back of the machine body in order to increase the stability of the machine body during crane work, and the ground plate of the outrigger exceeds a predetermined set value. An alarm device for a crane work vehicle that issues an alarm when a load is applied.In a box-shaped bed, the upper surface has an upper surface plate that serves as a stepping plate for the outrigger ground plate, and the lower surface has a bottom plate. ,
A load detector is provided on the lower surface of the top plate of the bed, and a controller for inputting a signal from the load detector and an alarm generator are provided inside the bed to ensure that the signal from the load detector has a predetermined value. When the controller determines that the status signal exceeds the load set value, the controller outputs an alarm generation command signal to the alarm generator. Further, in another embodiment of the present invention, an upper surface plate serving as a step plate of the grounding plate of the outrigger is provided on the upper surface portion, and a bed having a bottom plate on the lower surface is formed in a box shape, and the underside of the upper surface plate of the bed is provided. A load switch is installed on the floor, and an alarm generator is installed inside the bed so that a load exceeding the specified load setting value is applied to the top plate so that the load switch can be turned on by bending the top plate. The electric circuit of the alarm generator is energized when the load switch is turned on. In both of the above examples,
As the alarm generator, at least one of an alarm sound generator and a light emitting display was equipped.

[0005]

According to the first embodiment of the present invention, when the crane operation is performed, the bed which constitutes the alarm device of the first embodiment is arranged below the lower surface of the grounding plate of the outrigger of the crane. When the crane tries to lift a suspended load that exceeds a predetermined rated load, a signal from a load detector provided on the lower surface of the top plate of the bed is input to the controller. Based on the signal, the controller makes a determination, and the controller determines that the signal is a state signal exceeding a predetermined load set value, so that the controller outputs an alarm generation command signal to the alarm generator. As a result, an alarm sound (including voice etc.) is generated from the alarm sound generator among the alarm generators, and the light emitting indicator lights up (including blinking etc.), emits light and displays characters.

In the second embodiment of the present invention, when carrying out a crane operation, a bed which constitutes the alarm device of the second embodiment is arranged below the lower surface of the grounding plate of the outrigger of the crane. When the crane tries to lift a suspended load exceeding a predetermined rated load, the upper plate of the bed flexes and actuates the load switch to turn on the electric circuit of the alarm generator. As a result, an alarm sound (including voice etc.) is generated from the alarm sound generator among the alarm generators, and the light emitting indicator lights up (including blinking etc.), emits light and displays characters.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a side view of a truck crane using the alarm device for outriggers of the present invention. In the figure, 9 is a jib of a truck crane, 10 is a wire rope for a crane, 11 is a crane hook, 12 is a load of a suspended load, 13 is four outriggers extending to the left and right and front and rear, and 14 is a ground plate at the lower end of the outrigger 13. , 15 is a bed which is arranged between the lower surface of the ground plate 14 and the ground (GL) and which constitutes a round or square alarm device in a plan view. 2 is a view seen from A of FIG. 1, and is a cross-sectional view showing a configuration of a bed 15 which is an alarm device. In the figure,
16 is a top plate of the bed 15, 17 is a bottom plate, 18 is a load detector, 19 is a controller, 20 is a buzzer which is an alarm sound generator, 21 is a flasher unit which is a light emitting display,
Reference numeral 22 is a battery that is a DC power source, and 23 is a power switch. FIG. 3 is a control circuit diagram of the alarm device according to the first embodiment of the present invention.

Next, the construction of the alarm device according to the first embodiment of the present invention will be described with reference to FIGS. According to the present invention, an upper surface plate 16 serving as a step plate for the grounding plate 14 of the outrigger 13 is provided on the upper surface portion, and a bed 15 having a bottom plate 17 on the lower surface is formed in a box shape. A load detector 18 is provided on the lower surface, and a controller 19 for inputting a signal from the load detector 18 into the bed 15 is provided.
A buzzer 20 and a flasher unit 21 are provided, and the controller 19 determines that the signal from the load detector 18 is a state signal exceeding a predetermined load set value, so that the controller 19 informs the buzzer 20 and the flasher unit 21. Is configured to output an alarm generation command signal.

Next, the operation of the alarm device according to the first embodiment of the present invention will be described. In the first embodiment of the present invention, the bed 15 is arranged below the lower surface of the ground plate 14 of the outrigger 13 when performing a crane operation. In this case, the power switch 2
Keep 3 closed. When the crane tries to lift a suspended load exceeding a predetermined rated load, a signal from a load detector 18 provided on the lower surface of the upper plate 16 of the bed 15 is input by the controller 19. The controller 19 makes a judgment based on the signal, and the controller 19 judges that the signal is a state signal exceeding a predetermined load set value, so that the controller 19 issues an alarm generation command to the buzzer 20 and the flasher unit 21. Output a signal. As a result, an alarm sound is generated from the buzzer 20,
In addition, the flasher unit 21 performs a flashing lighting display. Therefore, the driver and the worker can recognize that the rated load of the suspended load exceeds the predetermined set value. The above-mentioned alarm generator is not limited to the buzzer 20 and the flasher unit 21, and an alarm sound generator that emits a sound,
It is also possible to use a light emitting display for displaying characters.

Next, FIG. 4 is an electric circuit diagram of a second embodiment alarm device of the present invention. In the figure, the same components as those of the alarm device of the first embodiment (shown in FIGS. 2 and 3) are designated by the same reference numerals. 24 is a load switch, 2
Reference numeral 5 is an alarm lamp. Next, the configuration of the second embodiment alarm device of the present invention will be described with reference to FIG. In the present invention, the bed 1
5 '(not shown because the structure of the bed 15' is similar to that of the bed 15 shown in FIG. 2), a load switch 24 is provided on the lower side of the top plate, and the bed 1
5'is provided with a buzzer 20 and an alarm lamp 25, and a load exceeding a predetermined load set value is applied to the upper plate to bend the upper plate so that the load switch 2
4 so that the load switch 24 can be turned on.
The electric circuit of the buzzer 20 and the alarm lamp 25 is configured to be energized in the ON state.

Next, the operation of the alarm device according to the second embodiment of the present invention will be described. In the second embodiment of the present invention, the bed 15 'is arranged below the lower surface of the ground plate 14 of the outrigger 13 when performing a crane operation. In this case, the power switch 23 is closed. When the crane tries to lift a suspended load exceeding a predetermined rated load, the top plate of the bed 15 'flexes and the load switch 24 is turned on, so that the electric circuits of the buzzer 20 and the alarm lamp 25 are energized. To do. As a result, an alarm sound is generated from the buzzer 20,
Further, the alarm lamp 25 performs a lighting display. Therefore, the driver and the worker can recognize that the rated load of the suspended load exceeds the predetermined set value. The alarm generator is not limited to the buzzer 20 and the alarm lamp 25, and an alarm sound generator that emits a sound or a light emitting display that displays characters can be used.

[0012]

According to the first embodiment of the present invention, when the crane operation is performed, the bed which constitutes the alarm device of the first embodiment is arranged below the lower surface of the grounding plate of the outrigger of the crane. When the crane tries to lift a suspended load that exceeds a predetermined rated load, a signal from a load detector provided on the lower surface of the top plate of the bed is input to the controller. Based on the signal, the controller makes a judgment, and when the controller judges that the signal is a state signal exceeding a predetermined load set value, the controller outputs an alarm generation command signal to the alarm generator. The second aspect of the present invention
In the embodiment, when the crane operation is performed, the bed which constitutes the alarm device of the second embodiment is arranged below the lower surface of the grounding plate of the outrigger of the crane. When the crane tries to lift a suspended load exceeding a predetermined rated load, the upper plate of the bed flexes and actuates the load switch to turn on the electric circuit of the alarm generator. As a result, when the crane attempts to lift a suspended load exceeding a predetermined rated load in both of the above-described examples, an alarm sound (including sound) is generated from the alarm sound generator of the alarm generators, and The light-emitting display lights up (including blinking), emits light, and displays characters. That is, the driver and the worker can recognize that the rated load of the suspended load exceeds a predetermined set value. Therefore, the safety of crane work can be improved by using the alarm device for outriggers of the present invention during crane work.

[Brief description of drawings]

FIG. 1 is a side view of a truck crane using an alarm device for outriggers of the present invention.

FIG. 2 is a cross-sectional view showing the configuration of the bed in FIG.

FIG. 3 is a control circuit diagram of the alarm device according to the first embodiment of the present invention.

FIG. 4 is an electric circuit diagram of an alarm device according to a second embodiment of the present invention.

FIG. 5 is a plan view of a crane according to an embodiment of the related art.

6 is a cross-sectional view of the grounding board in FIG.

[Explanation of symbols]

 1 Crane 2, 12 Load 13 Outrigger 14 Grounding Plate 15, 15 'Laying Platform 16 Top Plate 17 Bottom Plate 18 Load Detector 19 Controller 20 Buzzer 21 Flasher Unit 24 Load Switch 25 Alarm Lamp

Claims (3)

[Claims] 1. An outrigger is extended to the left and right or front and back of the machine to increase the stability of the machine during crane work, and an alarm is issued when a load exceeding a predetermined set value is applied to the ground plate of the outrigger. In such an alarm device for a crane work vehicle, the upper surface is provided with an upper surface plate that serves as a stepping plate for the outrigger grounding plate, and the lower surface has a bottom plate in the shape of a box. A state where the load detector is installed on the bottom surface, the controller that inputs the signal from the load detector and the alarm generator are installed inside the floor, and the signal from the load detector exceeds the specified load setting value. An alarm device for outriggers, wherein the controller outputs an alarm generation command signal to the alarm generator when the controller determines that the signal is a signal. 2. Outriggers are extended to the left and right or front and back of the machine to increase the stability of the machine during crane work, and an alarm is issued when a load exceeding a predetermined set value is applied to the ground plate of the outrigger. In such an alarm device for a crane work vehicle, the upper surface is provided with an upper surface plate that serves as a stepping plate for the outrigger grounding plate, and the lower surface has a bottom plate in the shape of a box. A load switch is installed on the lower side, and an alarm generator is installed inside the bed. By applying a load exceeding the specified load setting value to the top plate, the load switch is turned on by bending the top plate. Thus, the alarm device for outriggers is characterized in that the electric circuit of the alarm generator is energized when the load switch is turned on. 3. The outrigger alarm device according to claim 1 or 2, wherein at least one of an alarm sound generator and a light emitting display is provided as an alarm generator. Alarm device.