JPS6245390B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a safety device for a pole-erecting vehicle equipped with a digging device.

Generally, a crane for a pole-erecting vehicle has a multi-stage boom composed of a base boom that is directly attached to the base of the pole-erecting vehicle, and a telescoping boom that is extendably and retractably housed within the base boom. A drill support frame is fitted and supported by the telescoping boom, and a drilling device is connected to the drill support frame.

During pole erection work or crane work, it is necessary to selectively connect the drill support frame to either the base boom or the telescopic boom, but in the case of conventional systems, the telescopic boom is completely attached to the base boom. If the drilling equipment is suspended without being stowed, the drill support frame may not be connected to any of the above booms, and if the telescopic boom is extended or the crane is raised or lowered in this state, the drill support frame will be attached to the drill support frame along the telescopic boom. This has the disadvantage that the drilling equipment may slide carelessly and the drilling equipment may also move, posing a danger to the operator.

The present invention has been made in view of the above drawbacks, and is capable of reliably connecting the support frame to either the base boom or the telescopic boom, particularly when the telescopic boom is completely accommodated within the base boom, i.e. The purpose is to ensure safety by allowing the drill support frame to be connected to the telescopic boom only when fully retracted.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a pole-erecting vehicle, and a base 3 on which a crane 5 and an operator's seat 6 are provided is rotatably provided at the rear of a chassis 2. The crane 5 includes a base boom 7, an intermediate boom (not shown) completely immersed in the base boom 7, and a tip boom 8 housed within the intermediate boom.
A multi-stage boom 1 consisting of a telescopic boom consisting of
0, and a drill support frame 9 is fitted and supported on the outer periphery of the tip of the tip boom 8. Also, base boom 7
A cylinder 11 for raising and lowering the crane 5 is provided between the crane 5 and the base 3.

12 is an earth auger which is a hole digging device attached to the crane 5, and an auger drill 13 is attached to one end of the earth auger.
is provided, and the auger drill 13 is rotated by a motor 15. 16 is a wire that automatically stores the earth auger 12 by rotation of the motor 15; 17;
is a supporter that stores and holds the earth auger 12. Motor 15, base frame 18 and connecting member 20
are successively arranged and attached to the drill support frame 9.

A hook device 21 is provided on the side of the drill support frame 9, and the hook device 21 is rotatable around a support shaft 25 attached to the drill support frame 9, and includes a front hook portion 26, a rear hook portion 27, and A contact arm portion 28 is formed, and a notch 32 is formed in the upper edge of the front hook portion 26 on the support shaft 25 side. 33 is a tension spring, one end of which is fixed to the front hook part 26 and the other end to the drill support frame 9;
As a result, the hook device 21 is always urged to rotate counterclockwise in the drawings around the support shaft 25.

On the other hand, the lashing means 22 is connected to the support frame 9 and the hook device 2.
1, and is composed of a connecting shaft 35, a securing locking piece 36, a tension spring 39, and the notch 32. The connecting shaft 35 is attached to the drill support frame 9 and penetrates from the inside of the drill support frame 9 to the outside of the frame, and the securing locking piece 36 is attached to the support frame 9 of the connecting shaft 35.
A pressing lever 37 is provided at the outer end, and at the other end inside the drill support frame 9. The lashing locking piece 36 and the pressing lever 37 are arranged facing in opposite directions, and a protrusion 38 that engages with the notch 32 is formed at the lower end of the lashing and locking piece 36. There is. 39 is a tension spring;
One end is fixed to the lashing locking piece 36 and the other end is fixed to the drill support frame 9, so that both the lashing and locking piece 36 and the pressing lever 37 rotate clockwise around the connecting shaft 35. It is strongly energized.

A pressing pin 4 is mounted upward on the front side of the tip boom 8.
0, and on the other hand, latch pins 41 are protruded from the lower part slightly forward of the press pins 40, and the press pins 40
The drill support frame 9 is moved by the extension and contraction movement of the tip boom 8.
The pressure lever 37 is introduced into the interior of the vehicle and presses or releases the pressure lever 37. Furthermore, the latch pin 41 is attached to the front hook portion 2.
6.

A latching hook 43 is attached to the base boom 7 by a support shaft 45. The latching hook 43 engages with the rear hook portion 27, and one end of a tension spring 47 is fixed to the lower part. The other end of the tension spring 47 is fixed to the base boom 7, so that the hook 43 is always urged to rotate clockwise about the support shaft 45. Further, the rotation of the hook 43 is restricted by abutting the side surface of the hook 43 against a stopper 48 attached to the base boom 7.

On the other hand, the connecting member 20 contacts the contact arm portion 28 when the earth auger 12 is stored in the crane 5, and the connecting member 20 separates when the earth auger 12 is rotated to the working position for pole erection work. .

Next, to explain the operation, in FIG. 3, when the earth auger 12 is retracted and the intermediate boom and tip boom 8 (not shown) are fully retracted (hereinafter referred to as fully retracted), the connection Since the member 20 is in contact with the contact arm portion 28, the hook device 21 is not rotated, and the rear hook portion 27 is retained on the latching hook 43, and the front hook portion 26 is not rotated from the latching pin 41. is seperated. Further, since the pressing pin 40 presses the pressing lever 37, the lashing locking piece 36 is also rotated counterclockwise against the force of the tension spring 39, and its protrusion 38 is inserted into the notch 32 of the hook device 21. has left from.

When performing crane work, please refer to Figure 4.
The tip boom 8 is extended from the fully retracted state mentioned above.
Accordingly, the pressing lever 37 is rotated clockwise in conjunction with the pressing pin 40, and the protrusion 38 of the lashing locking piece 36 engages with the notch 32, and the hook device 2
1 is tied down. Therefore, while the telescopic boom including the tip boom 8 is being extended or contracted, the earth auger 12 is rotated to the working position, and the connecting member 20 is rotated to the working position.
Even if the hook device 21 is separated from the abutting arm portion 28, the hook device 21 cannot be rotated because it is secured by the securing means 22, and the engagement with the locking pin 41 is prevented, and the support frame 9 and the base boom are 7 connections are maintained.

Next, in order to perform the pole erection work, as shown in FIG. 5, when the earth auger 12 is rotated from the fully retracted state to the working position, the connecting member 20
Leave from 8. In this case, the protruding portion 38 and the notch 32 are separated from each other and the locking of the hook device 21 is released, so the hook device 21 rotates counterclockwise and the front hook portion 26 is attached to the latching pin 41. The drill support frame 9 is latched and attached to the tip boom 8.
It is connected and secured to. As a result, Earth Auger 1
2 can move together with the tip boom 8.

To continue crane work, the telescopic boom including the intermediate boom and tip boom 8 is fully retracted and the earth auger 12 is retracted, and the connecting member 20
comes into contact with the contact arm portion 27, so the hook device 2
1 is rotated clockwise against the force of the tension spring 33, and the rear hook portion 27 is latched to the latching hook 43. As a result, the drill support frame 9 is connected to the base boom 7 again.

In addition, in this example, the drill support frame was selectively connected between the base boom and the tip boom of the telescopic boom, but it may be selectively connected between the base boom and the intermediate boom. Alternatively, the telescopic boom may be configured with only a single tip boom. Further, in this example, the lashing means mainly consisted of a notch formed in a part of the hook device and a lashing piece that engaged with the notch to lock the operation of the hook device. As another embodiment, as shown in FIG. 6, a protrusion 52 is formed on the hook device 50, and a securing locking piece 53 that engages with the protrusion 52 to secure the rotation of the hook device 50 is attached to the drill support frame. 55 to constitute the lashing means 51.

As described above, according to the present invention, by providing the lashing means for lashing the hook device, the drill support frame can be connected from the base boom to the telescopic boom only when the telescopic boom is fully retracted. Even when the drilling equipment is rotated to its working position, the hook device is tied down and does not operate, and the drill support frame is securely connected to the base boom, preventing accidental movement of the drilling equipment. Pole erection work can be carried out safely without causing any problems.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a side view of a pole-erecting vehicle, FIG. 2 is a plan view cut away from the main part taken along the - line in FIG. 1, and FIGS. 3 to 5 are side views of the main part. Figure 3 shows the state when the earth auger is retracted and the telescopic boom is fully retracted, Figure 4 shows the state during crane work, Figure 5 shows the state during pole erection work, and Figure 6 shows the state when the telescopic boom is fully retracted. FIG. 7 is a side view of main parts showing another embodiment. 1...Pole erection vehicle, 7...Base boom, 8...Tip boom, 9,55...Drill support frame, 10...Multi-stage boom, 12...Drilling device (earth auger), 2
1, 50... Hook device, 22, 51... Lagging means, 32... Notch, 36, 53... Lagging locking piece, 41... Latching pin.

Claims (1)

[Claims] 1. A multi-stage boom is constituted by a base boom and telescopic booms such as an intermediate boom and a tip boom that are retractably housed within the base boom, and a hole-drilling device is attached to any of the telescopic booms. A drill support frame that is connected in a suspended manner is inserted into the drill support frame, and the drill support frame is configured to be selectively connectable to either the base boom or the telescopic boom by a hook device provided on the drill support frame. At the same time, the drill support frame is provided with a lashing means for lashing the operation of the hook device, and the lashing means is linked to the expansion and contraction of the telescopic boom, and releases the lashing of the hook device when the telescopic boom is fully retracted. A safety device for a pole-erecting vehicle equipped with a drilling device, characterized in that the drill support frame and the telescopic boom are connected to each other. 2. The lashing means includes a notch provided in a part of the hook device, and a lashing piece that engages with the notch to lock the operation of the hook device, and the lashing piece 2. A safety device for a pole-erecting vehicle equipped with a digging device according to claim 1, wherein said hook device is prevented from engaging with a locking pin of a telescopic boom when said notch is engaged with said hook device.