KR19990035735U - Boom Central Position Indicator for Crane - Google Patents

Abstract

When attaching or detaching the counter weight for the crane which is mounted at a certain position in the rear of the swing frame to hold the center of gravity of the equipment during work, the boom that is pivoted with respect to the lower carrier is located in the center position so that the counterweight can be easily detachably fixed. It was made to be possible.

According to a preferred embodiment, a swing frame equipped with a lower cab mounted on a driving cab and rotatable on the lower carrier, pivotally mounted on the lower carrier, and equipped with a boom telescopically driven by a cab and a boom cylinder drive; A crane boom central position display device having a counterweight detachably mounted at a predetermined position behind the swing frame during operation and detachably mounted at a predetermined position in front of the lower carrier during driving, wherein the boom central position display device for a crane is formed in the cab for the work. A first switch that is turned on / off by a driver's operation when the counterweight is attached to or detached from the swing frame, a cam formed at a predetermined position on the lower carrier upper surface, and formed at the swing frame at a predetermined position; Is operated by contact with the cam when turning the boom 180 degrees while the power is on And a second switch to stop driving of the swinging device to swing the swing frame, and when the counterweight is attached or detached, the second switch is operated when the boom is turned while the power source of the first switch is connected by a driver. It provides a stop boom center position display device for the crane characterized in that the stop at the central position with respect to the lower carrier, the operator can turn off the power of the first switch by the driver during the operation to turn the boom at a predetermined angle. .

Due to this, the boom that is pivoted with respect to the lower carrier when the counterweight for the crane, which is mounted at the rear of the swing frame to hold the center of gravity of the equipment during operation and is attached to the rear of the lower frame, when the counterweight for the crane is attached to the predetermined position at the rear of the swing frame, is located at the center position. It is advantageous to improve workability by easily fixing the counterweight within a short time by being located at.

Description

Boom Central Position Indicator for Crane

The present invention relates to a central position display device for a crane boom, and more particularly, to swing the lower carrier when attaching and detaching a counter weight for a crane mounted at a predetermined position behind the swing frame to hold the center of gravity of the equipment during operation. It relates to a crane boom central position display device to be able to easily detachably secure the counterweight by allowing the boom to be located in the center position.

In general, a vehicle with an axle of 10 tons or more or a weight of 40 tons or more of the axle, such as in a crane vehicle, violates the road transportation method when transporting equipment. For this reason, the counterweight of the weight which is mounted at a predetermined position behind the swing frame to hold the center of gravity of the equipment during work is removed and then driven. As such, when the above-mentioned counterweight is mounted and removed, a separate crane and a transport vehicle are needed, and thus the cost increases, and the above-described counterweight has a disadvantage in that excessive work time is required.

Therefore, as shown in Figures 1 and 2, by mounting the counterweight detachment device to the equipment after removing the counterweight without using a separate equipment after the operation to be mounted on the predetermined position in front of the lower carrier, and then to run It was.

That is, as schematically shown in FIG. 1, the swing frame 4 on which the boom 3 and the work cab 14 are mounted is pivotally mounted on the lower carrier 2 on which the driving cab 1 is mounted. The counterweight 5 is detachably mounted by driving the hydraulic cylinder 8 at a predetermined position behind the swing frame 4, and the counter described above so as to support the counterweight 5 described above in operation. A fixing pin 6 is formed on the outer side of the weight 5, and a hook 7 for detachably locking the aforementioned fixing pin 6 is formed in the swing frame 4.

Therefore, when the vehicle is to be driven after the predetermined work is completed, as shown in FIG. 2, the boom (described above) for the lower carrier 2 described above with the corresponding lever operation in the above-described work cab 14. 3) is rotated 180 degrees by the above-described swing frame 4 (at this time, the upper portion of the above-described boom 3 is positioned in the direction opposite to the driving direction behind the lower carrier 2 described above), The above-mentioned counterweight 5 is removed by driving the hydraulic cylinder 8 and fixed to the predetermined position in front of the lower carrier 2 described above. Thereafter, the above-described boom 3 is pivoted 180 degrees with respect to the above-described lower carrier 2 by the lever operation in the above-described working cab 14 so that the upper portion of the boom 3 coincides with the driving direction. In the above-described driving cab (1) is to drive by the operation.

In addition, when the above-mentioned counterweight 5 mounted at the predetermined position in front of the lower carrier 2 is fixed to the swing frame 4 at the predetermined position in order to work, the above-described boom 3 is described above. In the operating cab 14, the lever is rotated 180 degrees with respect to the lower carrier 2 described above (at this time, as shown in Fig. 2, the upper portion of the above-described boom 3, the lower carrier ( 2) located in the direction opposite to the driving direction in the rear) The counterweight 5 is fixed to the predetermined position behind the swing frame 4 by driving the hydraulic cylinder 8 described above.

However, when the counterweight 5 is attached to or detached from the swing frame 4 at a predetermined position in order to work or travel, the driver's experience in the above-described work cab 14 or outside the above-described work cab 14 The above-described boom 3 such that the hydraulic cylinder 8 mounted on the swing frame 4 is close to the counterweight 5 mounted at a predetermined position in front of the above-described lower carrier 2 with the help of a separate assistant. ) Is rotated with respect to the lower carrier (2), and then attaching and detaching the above-described counterweight (5), it takes a lot of time when attaching and detaching the above-described counterweight (5), thereby reducing work efficiency, thereby The problem is that the cost is increased.

Therefore, the object of the present invention, when the operation is mounted to the predetermined position behind the swing frame to hold the center of gravity of the equipment during operation, the swinging counterweight for the crane mounted on the front of the lower carrier at the rear of the swing frame when detached to the predetermined position at the rear of the swing frame. It is to provide a crane boom central position display device to improve the workability by allowing the boom to be located in the central position to easily fix the counterweight within a short time.

1 is a schematic diagram of a vehicle equipped with a counterweight for a general crane,

2 is a schematic view of a state in which the boom is rotated 180 degrees to remove the counterweight when moving the vehicle and to mount the counterweight at a predetermined position in front of the lower carrier;

3 is a schematic view of a vehicle equipped with a crane boom central position display device according to an embodiment of the present invention.

Explanation of symbols used in the main part of the drawing

1: Cab for driving 2: Lower carrier

3: boom 4: swing frame

5: counterweight 6: holding pin

7: hook 8: hydraulic cylinder

11: first switch 12: cam

13: second switch 14: cab for work

The above-described object of the present invention is a swing frame equipped with a lower cab mounted on a driving cab and rotatable on the lower carrier and pivotally mounted on the lower carrier, and equipped with a boom that is telescopically driven by a driving cab and a boom cylinder. And a counterweight detachably mounted at a predetermined position behind the swing frame during operation and detachably mounted at a predetermined position in front of the lower carrier during driving, wherein the boom central position display device for a crane is formed in the cab for the operation. And a first switch to turn the power on / off due to a driver's operation when the counterweight is detached from the swing frame, a cam formed at a predetermined position on the lower carrier upper surface, and formed at the swing frame predetermined position. 1 When turning the boom 180 degrees while the power of the switch is on, And a second switch for stopping driving of the swing device for turning the swing frame, and turning the boom in a state in which power of the first switch is connected by a driver when the counterweight is attached or detached. Operation stops at the center position with respect to the lower carrier, and when the work is provided by the driver to turn off the power of the first switch provides a boom center position display device for a crane characterized in that the boom can be turned at a predetermined angle Is achieved by.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, whereby the technical scope of the present invention is not limited.

3 is a schematic view of a vehicle equipped with a crane boom central position display device according to an embodiment of the present invention.

As shown in the figure, the cab 1 for driving is mounted on the lower carrier 2, which is driven by the lever operation, and is rotatably mounted on the lower carrier 2 described above, and the cab 14 for work and the boom are rotated. Swing frame (4) to which the boom (3) is stretched and driven by driving the cylinder (9), and detachably mounted at a predetermined position in the rear of the swing frame (4) described above during operation, and the front of the lower carrier (2) described above when running. Since the configuration having the counterweight 5 detachably mounted at a predetermined position is applied in the same manner as shown in FIGS. 1 and 2, the detailed description thereof is omitted, and the overlapping reference numerals are the same.

Therefore, according to a preferred embodiment of the present invention, the first switch that the power is connected (on) / off (off) by the driver's operation when the above-described counterweight (5) with respect to the swing frame (4) (11) is installed in the above-described work cab (14), the cam 12 of a predetermined shape is formed in the center of the upper surface behind the lower carrier (2) described above, the counterweight (5) described above swing frame In the case of attaching and detaching (4), when the above-mentioned boom 3 is rotated 180 degrees while the power of the above-described first switch 11 is connected, the swing frame is operated due to contact with the cam 12 described above. A second switch 13 for stopping the turning device driving for turning (4) is formed at the predetermined position of the swing frame 4 described above so as to have a 180 degree phase difference from the cam 12 described above.

Referring to the use of the crane boom central position display device according to an embodiment of the present invention as described above are as follows.

The above-described swing of the above-mentioned counterweight 5 fixed at a predetermined position in front of the lower carrier 2 above in order to work in the state in which the upper end of the above-described boom 3 is the same as the driving direction of the lower carrier 2 described above. In the case where the frame 4 is fixed at a predetermined position behind the frame 4, the upper portion of the above-described boom 3 is connected in a state in which the power of the above-described first switch 11 installed inside the above-described working cab 14 is turned on by the driver. Is rotated 180 degrees so as to be located in a direction opposite to the traveling direction of the lower carrier 2 described above (as shown in FIG. 2), the aforementioned second switch mounted at the predetermined position of the swing frame 4 described above. The lower carrier 2 comes into contact with the cam 12 formed at the predetermined position so as to have a phase difference of 180 degrees. As a result, the driving of the swinging device for turning the swing frame 4 described above is stopped due to the contact between the cam 12 and the second switch 13 described above.

Thus, as the above-described boom 3 pivots exactly 180 degrees with respect to the above-described lower carrier 2 (shown in FIG. 2), the above-described counterweight mounted at a predetermined position in front of the above-described lower carrier 2 The hydraulic cylinder 8 described above mounted on the swing frame 4 described above with reference to (5) is correctly positioned. Therefore, the above-described counterweight 5 can be easily mounted at a predetermined position behind the above-described swing frame 4 by driving the above-described hydraulic cylinder 8.

Accordingly, the driver can turn the upper end of the above-described boom 3 in the above-mentioned working cab 14 so as to be located in the opposite direction to the driving direction of the lower carrier 2 described above, and then perform a predetermined work. At this time, since the power of the above-described first switch 11 installed in the above-described work cab 14 is turned off by the driver, the above-described boom 3 is connected to the above-described lower carrier 2. Even when the cam 12 and the above-described second switch 13 are in contact with each other during the swing, the swing frame 4 can swing at a predetermined angle.

On the other hand, when the above-mentioned counterweight (5) mounted at a predetermined position behind the swing frame (4) in order to travel by the lever operation in the above-described driving cab (1) is finished, the above-mentioned As the counterweight 5 is separated by the reverse order of the mounting method, detailed description thereof will be omitted.

As described above, according to a preferred embodiment of the present invention, the crane counterweight mounted on the rear of the swing frame to hold the center of gravity of the equipment during operation, and attached to the front of the lower carrier when driving, is detached to the rear of the swing frame. The boom that is pivoted with respect to the lower carrier at the center is positioned in the center position, thereby making it easy to fix the counterweight within a short time, thereby improving workability.

Claims (1)

A swing frame equipped with a driving cab mounted on the lower carrier, which is pivotally mounted on the lower carrier, a swing frame mounted on the lower carrier, and a telescopic boom driven by a driving cab and boom cylinder driving, and the rear of the swing frame during operation. In the crane boom central position display device having a counterweight detachably mounted at a predetermined position and detachably mounted at a predetermined position in front of the lower carrier when driving: A first switch formed in the work cab and powered on / off by a driver's operation when attaching or detaching the counterweight from the swing frame; A cam formed at a predetermined position on the lower carrier upper surface; And A second switch formed at a predetermined position of the swing frame and stopping the driving of the swinging device to turn the swing frame by contacting the cam when the boom is turned 180 degrees while the power of the first switch is turned on; Thus, when the counterweight is attached or detached by the driver, when the power source of the first switch is turned on, the second switch stops at a central position with respect to the lower carrier by the operation of the second switch when the boom is turned on. The boom center position display device for a crane, characterized in that by turning off the power of the first switch it is possible to turn the boom at a predetermined angle.