JPS632543Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a boom guard device for a digging and pole-erecting vehicle.

A guard device that protects the top surface of the boom of a hole-drilling pole-erecting vehicle has been known in the past, but it has a base boom, an intermediate boom, and a tip boom, and the hole-drilling device is selectively locked to the tip boom and the base boom. In the case of drilling pole erection vehicles, the bracket that suspends the drilling equipment moves from the outer periphery of the intermediate boom to the tip boom, so the guard cannot be fixed to the intermediate boom. Since it is not supported, the guard lacks rigidity, and if it were to have sufficient rigidity, the weight of the guard would increase, resulting in a decrease in the performance of the digging pole erecting vehicle.

The present invention has been developed in view of the above-mentioned circumstances, and provides a boom guard device for a digging pole-erecting vehicle in which the intermediate portion of the extended guard is supported both during digging and other times. The purpose is to

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, an intermediate boom 2 and a tip boom 3 are connected to a base boom 1 in a telescopic manner, and the intermediate boom 2 and tip boom 3 are simultaneously extended and contracted by a built-in telescoping device (not shown).
At the top of the telescopic boom are a base guard 4 and an intermediate guard 5.
and a tip guard 6 are extendably provided, both ends of the base guard 4 are fixed to the upper surface of the base boom 1, and the base end of the intermediate guard 5 is slidably attached to the base guard 4, and the tip is attached to the tip of the base guard 4. Alternatively, the tip guard 6 is selectively locked to the base end of the tip guard 6, and the tip guard 6 has its base end slidably attached to the intermediate guard 5, and its tip fixed to the head of the tip boom 3. 3 expands and contracts, the intermediate guard 5 and the tip guard 6 sequentially expand and contract.

A sleeve 7 having an outer peripheral surface that communicates with the outer peripheral surface of the intermediate boom 2 is slidably fitted to the outer periphery of the tip boom 3, and this sleeve 7 is selectively locked to the tip of the tip boom 3 or the intermediate boom 2. be done.
A bracket 8 to which a hole digging device is attached is fitted to the outer periphery of the sleeve 7, and this bracket 8 is locked to the tip boom 3 together with the sleeve 7 during hole digging work, and is locked to the base boom 1 except during hole digging work. It is locked at the tip of.

A frame 9 is slidably fitted to the outer circumference of the intermediate boom 2, and this frame 9 is engaged with the outer circumference of the tip of the intermediate boom 2 during digging, and is engaged with the tip of the base boom 1 except during digging. It is locked between the bracket 8 and the locked bracket 8.

Both the sleeve 7 and the frame 9 are provided with guard intermediate supports 10, 11, respectively;
As shown in FIG. 4, the intermediate support parts 10 and 11 are
A receiver 1 that slides with the tip guard 6 inside two parallel columns 13 and 14 and supports the tip guard 6.
5 and 16 are installed respectively.

With the above configuration, when the drilling device 12 is changed from the stored state shown in FIG. 1 to the working state and the intermediate boom 2 and the tip boom 3 are simultaneously extended, the sleeve 7
and the bracket 8 of the drilling device 12 is connected to the tip boom 3.
Since the frame 9 is locked to the outer periphery of the tip of the intermediate boom 2, when the telescopic boom is extended, the tip guard 6 and the intermediate guard 5 are extended in this order, and when the telescopic boom is retracted, the intermediate guard 5 and the tip guard are As shown in FIG. 2, the tip guard 6 is supported by an intermediate support portion 11 provided on the frame 9 at a substantially intermediate position of the guard that contracts and expands.

Frame 9 and bracket 8 except when digging holes
is locked to the tip of the base boom 1, and the drilling device 12
is stored on the side of the base boom 1, and the sleeve 7 is locked to the tip of the intermediate boom 2. Therefore, the intermediate guard 5 and the tip guard 6, which expand and contract as the intermediate boom 2 and the tip boom 3 expand and contract, As shown in the figure, the distal end guard 6 is supported by an intermediate support portion 10 provided on the sleeve 7 at a substantially intermediate position of the expanding and contracting guard, so that the guard does not bend.

In the above embodiment, the intermediate boom 2 and the tip boom 3 extend and contract simultaneously, and the intermediate guard 5 and the tip guard 6 expand and contract sequentially, but the present invention is such that the intermediate boom and the tip boom extend and contract sequentially. Alternatively, it is also effective in the case where the middle guard and the tip guard expand and contract simultaneously.

As described above, according to the present invention, in a drilling pole erection vehicle that performs work by selectively locking a drilling device to the tip boom or the base boom of a telescoping boom consisting of a base boom, an intermediate boom, and a tip boom. Since the middle part of the telescopic part of the guard, which extends and contracts together with the telescopic boom, is always supported regardless of the working condition, the guard does not sag and can be made lightweight.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view of the telescopic boom showing the contracted state, FIG. 2 is a side view of the telescopic boom showing the extended state during digging work, and FIG. 3 is a side view of the telescopic boom showing the extended state during digging work. FIG. 4 is a side view of the telescoping boom showing an extended state other than when it is in an extended state, and FIG. 4 is a detailed view of the main parts. 1... Base boom, 2... Intermediate boom, 3... Tip boom, 4... Base guard, 5... Intermediate guard,
6... Tip guard, 7... Sleeve, 8... Bracket, 9... Frame, 10, 11... Intermediate support portion.

Claims (1)

[Scope of utility model registration request] In a boom guard device for a drilling pole construction vehicle, which has a base guard, an intermediate guard, and a tip guard retractably provided on the top of a telescopic boom equipped with a base boom, an intermediate boom, and a tip boom, the device is fitted to the outer periphery of the tip boom. , a sleeve is secured to the tip boom together with the bracket of the drilling equipment during drilling work, and is secured to the tip of the intermediate boom at times other than drilling work, and is fitted to the outer circumference of the intermediate boom to perform drilling work. The frame has a frame that is locked to the tip of the intermediate boom at times, and a frame that is locked to the tip of the base boom except when digging a hole, and the guard is selected by the sleeve or frame that is locked to the tip of the intermediate boom. For sliding support,
A boom guard device for a digging pole construction vehicle, characterized in that both the sleeve and the frame are provided with intermediate support parts for the guard.