JPS6012496A - Alarm device on incomplete stretching of outrigger - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention is applicable to truck cranes, self-propelled cranes, etc.
This invention relates to a swing crane vehicle in which outriggers that can extend to the left and right are attached to the vehicle body before and after the lane swing axis.

When carrying out cargo handling work with at least one outrigger partially extended in order to install such a swinging crane vehicle on narrow ground, the crane operator on the outgoing crane swivel platform should remove the partially extended outrigger. Not only can you forget that there is a This will result in a fall accident. Currently, there are more than 80 cases of crane overturning accidents. The present invention warns the crane operator of this before reaching a dangerous turning area during cargo handling operations based on incompletely extended outriggers, and as described above. The purpose is to prevent lane-turnover accidents from occurring.

In the present invention, each outrigger 2.3, 4. 5
Conductive plates 2b, 3b, 4b, and 5b are connected to each other through electrical circuits 2a, 3a, 4a, and 5a, respectively, and are insulated and attached to each other in the order of outriggers that a crane boom 6 passing in a certain direction passes. Switches 2c, 6c, 4c, and 5c, which open only when the corresponding outrigger is fully extended, are inserted into each military road, and when the crane boom turns from a position on an arbitrary outrigger as a starting point, it rotates clockwise and moves to the next road. The first brush 7 contacts the corresponding conductive plate of the outrigger on the reaching side only until it reaches the top of the outrigger, and the first brush 7 contacts the corresponding conductive plate of the outrigger on the reaching side only until it reaches the outrigger on the next side.
The second brush 8 that contacts the corresponding conductive plate of the J-gauge is attached to the crane swivel base 9, and the direction of rotation of the crane is detected, and when the crane is turning to the right, the first brush 7 is used, and when it is turning to the left, the second brush 8 is used. The present invention is characterized in that a device for connecting the terminals to the operating circuit closing side terminals of the warning device 10 is mounted on the crane swivel base.

The present invention will be described below with reference to illustrated embodiments. FIG. 1 is a plan view schematically showing a self-propelled crane, with an enlarged schematic side view of the equipment inside the crane operator's cab (3), which also serves as a traveling operator's cab, installed on the crane swivel platform 9. 3 shows the completed operating circuit of the device of the present invention. 15
1 is a four-wheeled vehicle body, and on the central upper surface of the vehicle body 15 is a crane swivel platform 9 that rotates around the crane rotation axis 0.
are attached via a turntable (not shown), and front outriggers 2, 6 and rear outriggers 4, 5 are attached to the lower surfaces of the front and rear ends of the vehicle body, respectively, so as to be able to extend left and right. Each outrigger has a horizontal telescoping beam 16 operated by hydraulic pressure as in the past, and a vertical telescoping support leg 17 attached to its tip. is formed into one continuous cylindrical body, which is fixed to the vehicle body 15, and the distances from the crane rotation axis O (front and rear) to the IJ are equal.

Although the disk 1 in FIG. 1 is shown greatly enlarged, the disk 1 made of electrically insulating material is actually much smaller than the turntable, and the outer circumference of the disk 1 is equally divided as shown in FIG. Conductive plates 2b with equal arc length are placed in the four recesses 18.
, 3b, 4b, and 5b (4) are fitted and fixed, respectively, and the disc stands upright from the vehicle body 15 and is attached to the head 19a of the fixed support shaft 19 that loosely fits through the floor plate 9a attached to the lane turning base 9. , is wedged and fixed coaxially with the crane rotation axis 0.

Electrical paths (conductor wires) 2a, 3a, 4 that connect the conductive plates 2b, 3b, 4b, 5b to the corresponding outriggers 2, 3, 4, 5, respectively
Microswitches 2c and 3c inserted into a and 5a, respectively
, 4c and 5e open only when the telescopic beam 16 of the corresponding outrigger is fully extended as shown in FIG. At some point, the switch closes to ground each conductive plate to the corresponding outrigger or vehicle body 15.

1st. The second brush 7.8 is attached to the bolt hole 20a of the floor plate 9a on the crane swivel base side, as shown in FIG.

20b Posts 2 are electrically insulated and planted in the drilled parts.
A warning device 10 such as a synthetic electronic sound generator or an endless tape recorder is attached to the upper end of the disc 1 so that the tip brush portion 78 etc. is in sliding contact with the conductive plate on the outer periphery of the disc 1.
The operating circuit closing side terminal has the first terminal. The second brushes 7.8 are each connected in parallel via electrical circuits 21.22, into which a microswitch 12.13 is inserted, respectively. Switches 12 and 16 are in the crane cab 14
When the inner turning operation lever 11 is switched from the neutral position to the turning position shown in FIG. 1, only the switch on the predetermined turning direction side is closed in conjunction with this. That is, when the swing operation lever 11 is pulled in the (a) direction and rotated to the right rotation position, only the switch 12 is closed, and when the swing operation lever 11 is pushed in the (b) direction and rotated to the left rotation position, the switch 12 is closed. switch 16
Only closes.

Note that 26 is a battery for operating the warning device.

1st. The relative position of the second brush 7.8 and the conductive plate is a center line AOB that intersects the vehicle body longitudinal axis X-X (FIG. 3) at an angle of 45 degrees.

When each crane poom 6 is positioned on the COD, a conductive plate ( 5 in FIG. 3) connected to the outrigger ( 4 in FIG. 3) adjacent to the right turning side is connected to the outrigger ( 4 in FIG. 3) below the poom. In FIG. 3, the first brush 7 comes into contact with the rear end (or the insulating part between the conductive plates adjacent thereto) in the right turning direction of 5b), and the outrigger (the third outrigger) adjacent to the left turning side The second brush 8 is brought into contact with the rear end in the left turning direction of the conductive plate (3b in FIG. 3) connected to the conductive plate (6) in the figure (or the insulating part between the conductive plates adjacent thereto). There is.

According to the above configuration, when all the outriggers are fully extended as shown in FIG. 1, the switch 2c is activated.

3c, 4c, and 5c are all open, no matter how the pool 6 turns, there is no risk that the operating circuit of the warning device 10 will be closed and a warning will be issued to the crane operator.

If only the front and rear left outriggers 25 are partially extended and the switches 2c and 5c are closed as shown in Fig. 3, turn the crane to the right so that the poom 6 is aligned with the center line OB.
When it reaches the top, the switch 12 is closed by turning the turning operation lever 11 to the right, and the first brush 7 comes into contact with the conductive plate 5b. 7) closes and issues a warning to the crane operator.The warning will be issued continuously until the poom 6 reaches the road center line OC. Further, when the crane is turned to the left and the poom 6 reaches the center line OD as shown by the chain line in FIG. Therefore, the electric circuit 2 of the warning device 10
The operating circuit on the 2, 2a side is closed and a warning is issued, and this warning is issued continuously until the pool 6 reaches the road center line OA. Therefore, the crane boom 6 is
The warning device 10 will be activated even if the pool starts to turn to the right from an intermediate position between the center lines OD and OA, or if the pool starts to turn to the left from an intermediate position between the center lines OD and OA.

Furthermore, it is clear from the above explanation that the warning device is activated in the same way even if there is only one IJ gas (in case of incomplete extension), so the crane operator should be careful not to cause a crane overturn accident due to incomplete extension of the outrigger. Occurrence can be prevented.

Although the case of a self-propelled crane has been explained above, (8) Even in the case of a general truck crane that can rotate fully, the fourth
When the outriggers 2, 3, 4, and 5 are fully extended as shown in the figure, the crane boom 6 is positioned on the center lines AOB and COD, respectively, which intersect at an angle of 45 degrees with respect to the longitudinal axis X-X of the vehicle body. When positioned, the outriggers below the boom prevent the crane from overturning, so it is clear that the present invention can also be applied to truck cranes in which the distances to the outriggers before and after the crane rotation axis 0 are different. In FIG. 4, the members with the same reference numerals as those in FIG. This is a car driver's cab installed in

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram showing an outline of one embodiment of the present invention, Fig. 2 is an exploded perspective view of the disk mounting part, Fig. 3 is a plan view of a self-propelled crane showing its operating functions, and Fig. 4 is a diagram showing other FIG. 2 is a plan view schematically showing an example. 14...Crane operator's cabin, 15...Car body. Fang 1 Fig. Fang 2 Fig. Fang 3 Fig.

Claims (3)

[Claims] (1) In a swing crane vehicle in which outriggers that can be extended to the left and right are attached to the vehicle body before and after the crane rotation axis, each outrigger (2 A crane poom (
6) Insulate and attach switches (2e, 6e, 4c, 5c) to each outrigger that open only when the corresponding outriggers are fully extended in the order in which the outriggers pass, and the crane poom When turning from a position on the outrigger on the right side as a starting point, the first brush (7) contacts the corresponding conductive plate of the outrigger on the reaching side only until it turns right and reaches the outrigger on the next side; and a second brush (8) that contacts the corresponding conductive plate of the outrigger on the reaching side only until it reaches the outrigger on the road side, and is attached to the crane swivel base (9) to detect the direction of rotation of the crane, When turning right, the first brush (7
), and when turning left, set the second brush (8) to the bud indicator (
10) A warning device for when an outrigger is incompletely extended, characterized in that a device connected to the operating circuit closing side terminal is mounted on the crane swivel base. (2) Claim No. 1 in which four conductive plates having the same arc length are attached to the outer periphery of the disk (1) by dividing them evenly.
) Warning device when the outriggers are incompletely extended. (3) A device for detecting the direction of rotation of the crane includes switches (12, 13) that are closed in conjunction with the switching movement of the rotation operation lever (11), which is switched from the neutral position to the right rotation position or the left rotation position. Claim No. (1)
A warning device for when an outrigger is incompletely extended as described in item (2) or item (2).