JPH04277225A - Telescopic arm of construction machine used for both medium and large depth - Google Patents

Abstract

PURPOSE:To enable an extension arm to be simply attached in the case when a large depth work is required by means of a construction machine provided with a telescopic arm for medium depth. CONSTITUTION:In the case when digging is required to a large depth after it has been advanced to a medium depth, an extension arm 40 assembled with one extension end pipe 40n or extension end pipes 40n arranged in succession with more than one interposed intermediate pipes 40a in a telescopic manner to be capable of being extended or contracted is fitted into the end pipe 11n of a medium depth telescopic arm 11. An extended adjacent pipe equal interval extrusion and contraction device is constituted extending substantially same as the device for a medium depth telescopic arm for extruding or contracting the extension end pipe 40n relative to a base pipe 11a as well as equalizing the amounts of extension and contraction of all the adjacent pipes to one value. The extension arm 40 can be easily attached and removed to and from the medium depth extension arm without any external help.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telescoping arm for both medium and large depths for construction machines.

0002

BACKGROUND OF THE INVENTION Conventionally, there are various types of multi-stage telescoping arms used for excavating shafts, etc. with construction machines such as hydraulic excavators. There is a "Multi-stage telescoping arm for construction machinery" of No. 1, and the multi-stage telescoping arm is shown in Figure 7 (A) (B).
It is shown in , and is structured as follows.

[0003] The telescopic arm 11 is attached to a construction machine (not shown).
The distal end pipe 11n is sequentially telescopically telescopically inserted into the base end pipe 11a attached to the base end pipe 11a via one or more intermediate pipes 11b (FIG. 7 shows an example of one intermediate pipe). A pull-in rope 13 and a push-out rope 14 are wound around the drive drum 12, which is installed at the base end of the base pipe 11a and can be rotated forward or backward, at one end of which is fixed, and when one is wound, the other is sent out by the same length. , the other end of the pull-in rope 13 is fixed to the base end of the tip pipe 11n, and the push-out rope 14 is fixed to the base end of the tip pipe 11n.
A driven wheel for driving is necessary between the distal end of the rear proximal pipe 11a wrapped around the distal end of the proximal pipe 11a and the proximal end of the intermediate pipe 11b adjacent to the proximal pipe 11a. It is wrapped around the pipe several times (twice via the driving driven wheel 16 when there is only one intermediate pipe in FIG. 7), and the other end is fixed to the tip of the base pipe 11a. On the other hand, intermediate pipe 1
One end of the supporting rope 22 is fixed to the proximal end of the distal end pipe 11n, which is immediately adjacent to the inside, through a supporting driven wheel 21 installed at the distal end of the pipe 1b.The other end is connected to the proximal end pipe 11a, which is immediately adjacent to the outside. As a result, the extrusion rope 14, the pull-in rope 13, and the support rope 22 cooperate to equalize the amount of expansion and contraction between the various pipes adjacent to each other, and the distal pipe 1 is fixed to the proximal pipe 11a.
A push-pull device is provided at equal intervals between adjacent pipes, adapted to push or pull in the tip pipe 11.
A relatively large working tool (not shown) can be attached to the tip of the n.

The pull-in rope 13 and the push-out rope 14 wound around the drive drum 12 can be configured such that when one of them is wound up, the other is sent out by the same length as shown in FIG. 7, but as shown in FIG. As shown, the drive drum 12a is made so that the diameter of the part where the extrusion rope 14 is wrapped is half the diameter of the part where the extrusion rope 13 is wrapped, and one end of the extrusion rope 14 is attached to the part where the extrusion rope is wrapped. is fixed, and the other end is the proximal pipe tip driven wheel 1.
5, it is fixed to the base end of the intermediate pipe 11b, and when one pull-in rope 13 is wound, the other push-out rope 14 is sent out at a constant rate (1/2 in the case of FIG. 7). You can also do it like this.

Furthermore, although FIG. 7 shows the other end of the pull-in rope 13 fixed to the base end of the tip pipe 11n, the other end of the pull-in rope 13 is fixed to the base end of the intermediate pipe 11b. It can also be fixed; in that case, in addition to the supporting driven wheel 21, a new supporting driven wheel (not shown) is added to the base end of the intermediate pipe 11b, and a supporting rope (not shown) is wound around it. need to be added.

[0006]

[Problem to be solved by the invention] However, as shown in FIG.
The multi-stage telescoping arm shown in (A) and (B) is a hydraulic work tool that can be attached to the tip of the tip pipe 11n using a relatively small standard construction machine, such as a hydraulic excavator.
For example, a hydraulic clamshell bucket (not shown) with a capacity of about 0.25 m3 exhibits sufficient performance when excavating a shaft at a medium depth of about 17 m. In order to excavate at a deep depth, a relatively large hydraulic excavator must be equipped with a telescoping arm with a large amount of telescoping, or the number of intermediate pipes 11b must be increased, resulting in an excessive overall weight or a reduction in the weight. Therefore, there is a problem in that a small bucket, for example, a bucket of about 0.10 m3, is often used to perform medium-depth excavation, which is inefficient.

[0007]

[Means for solving the problem] When performing deep excavation work using equipment transported by helicopter in remote mountainous areas such as power line tower construction, it is necessary to efficiently compromise between depth, work volume, and weight of equipment. Therefore, in the present invention, after excavating to a medium depth using a bucket of about 0.25 m3 by attaching a telescoping arm for medium depth to a relatively small-sized current construction machine, the bucket capacity can be further increased, for example. 0.10
We provide a telescoping arm for both medium and deep depths for construction machines that can excavate to deep depths even if the size is as small as 3 m3.In addition, we provide an extension arm for deep depths that can be attached to the telescoping arm for medium depths by yourself. The aim is to provide a device that can

First, the telescoping arm for both medium and large depths of a construction machine according to the present invention is different from the telescoping arm for medium depths of a conventional construction machine as shown in FIGS. 7 and 8. When it is necessary to work at a deeper depth after carrying out work at a possible depth, the relatively large working tool is not attached, and only the extended end pipe or one or more extended intermediate pipes are inserted into the end pipe. Then, the extended tip pipe is sequentially fitted with an extension arm that is telescope-like and telescopically assembled, and the amount of expansion and contraction between the various adjacent pipes is all equal, and the extended tip pipe is pushed out or pulled in with respect to the base end pipe. In order to achieve this, the extension adjacent pipe pushing out/drawing device at equal intervals is configured to be extended in substantially the same manner as the adjacent pipe pushing/drawing device at equal intervals of the telescoping arm for medium depth, and the extension arm can be easily attached and detached by oneself. and a relatively small working tool is attached to the tip of the extended tip pipe,

[0009] Also, as a device for making it possible to easily attach the extension arm to the telescopic arm for medium depth by oneself, an extension is provided that guides the proximal end of the extension arm by sliding it inside the tip pipe. A guide rail is installed from the position of the slide shoe at the base end of the arm to the end of the base end of the extension arm, and a lifting roller is rotatably attached to the inside of the tip end of the tip pipe so as to protrude from the tip end of the extension arm. When the arm is attached to or removed from the tip pipe, the lifting roller is inserted into the guide rail and moves within the guide rail, and the lifting roller is inserted into the guide rail and moves before the slide shoe at the proximal end of the extension arm enters the tip pipe or at the tip end. When coming out of the pipe, the base end of the extension arm is guided in place of the slide shoe at the base end of the extension arm, and a guide rail base end end stopper is installed at the base end end of the guide rail. an extension arm configured to limit the movement of the lifting roller in the terminal direction and to lift the extension arm by the lifting roller, and to restrict or release the movement of the extension arm with respect to the medium-depth telescoping arm; It has a pipe fixing link that restricts or releases movement between the fixed link and the pipes constituting the extension arm, and an extension preparation follower to facilitate passing the extrusion rope when the extension arm is attached and used. A driving wheel or an extension preparation fixing point is provided so that an extension arm that increases the amount of extension and contraction of the telescoping arm can be easily attached.

0010

[Embodiments] Hereinafter, embodiments of the telescoping arm for both medium and large depths for construction machines according to the present invention will be described with reference to FIGS. 1 to 6. 1 and 2 are diagrammatic cross-sectional side views when an extension arm is attached to a telescopic arm for medium depth, respectively, and FIG. 3 is a side view showing a state in which the extension arm is attached to a telescopic arm for medium depth. 7. Components common to those in FIG. 8 are given the same reference numerals.

In FIGS. 1 to 3, reference numeral 11 is a multi-stage telescopic arm for medium depth use. Reference numeral 11a denotes a base end pipe, which is attached to the tip of a boom 32 supported by the main body of a construction machine, such as a hydraulic excavator 31, and is swung by an arm cylinder 33. 11b is an intermediate pipe, and 11n is a tip pipe. The intermediate pipe 11b is inserted into the base end pipe 11a, and the tip pipe 11n is inserted into the intermediate pipe 11b in a telescopic manner. The adjacent pipe pushing and pulling device included in the telescoping arm 11 is substantially the same as that shown in FIGS. 7 and 8, but when the extension arm 40 is attached to the telescoping arm 11, the pushing rope To facilitate hanging, an extension preparation driven wheel 17 is attached to the base end of the base pipe 11a as indicated by dotted lines in FIGS. 1 and 2.
Alternatively, if an extension preparation fixing point 18 is provided and work is done at a medium depth using only the telescopic arm, the extrusion rope 14 is attached to the extension preparation driven wheel 1 at the base end of the base pipe 11a as shown by the dotted line.
7, fix the other end to the base end pipe, and attach the extension arm 4.
When 0 is installed, the extension preparation driven wheel 1 as shown in the solid line
7 is moved to the base end of the intermediate pipe 11b as a driving driven wheel by attaching and detaching the mounting pin. In addition, although the above-mentioned medium-depth telescopic arm 11 is a three-stage type having one intermediate pipe 11b, it can also be a multi-stage type having two or more intermediate pipes.

Next, the above-mentioned 40 is a deep-depth extension arm for enabling the medium-depth telescopic arm 11 of a conventional construction machine, such as a hydraulic excavator, to perform deep-depth work. 40a and an extended tip pipe 40n, which are adjacent to each other, except that the extended intermediate pipe 40a is inserted into the tip pipe 11n of the medium-depth telescopic arm 11 via the extension arm bracket 41 as shown in FIG. In that the amount of expansion and contraction between the pipes is always equal, it is substantially the same as the telescopic arm 11 for medium depth shown in FIGS. A small working tool (not shown) can be attached via a working tool bracket 42.

FIGS. 7 and 8 show that after the extension arm 40 is attached, the amounts of expansion and contraction between the various adjacent pipes are all equal, and that the extension tip pipe 40b is pushed out or retracted with respect to the base end pipe 11a. This is obtained by configuring substantially similar extensions of equally spaced adjacent pipe extrusion and retraction devices.

FIG. 1 shows the case where the other end of the pull-in rope 13 is fixed to the proximal end of the extended tip pipe 40n, and FIG. 2 shows the case where it is fixed to the proximal end of the extended intermediate pipe 40a.

Next, a device for attaching the extension arm 40 for deep depth to the telescopic arm 11 for medium depth will be explained with reference to FIGS. 3 to 6. Reference numeral 51 denotes a slide shoe at the base end of the extension arm, which connects the base end of the extension arm 40 to the telescopic arm 1.
The extension arm 40 is fixed to the proximal end of the extended intermediate pipe 40a in order to slide and guide the end pipe 11n. 52 is a guide rail, which extends from the position of the slide shoe 51 at the base end of the extension arm to the intermediate pipe 40a.
A guide rail proximal end stopper 53 is fixed to the proximal end of the guide rail 52 .

Reference numeral 54 denotes a lifting roller, which is attached to the inside of the extension arm bracket 41 fixed to the tip of the tip pipe 11n of the telescopic arm 11 for medium depth.
Before the extension arm proximal slide shoe 51 enters the tip pipe 11n of the medium-depth telescoping arm 11 or comes out from the tip pipe 11n, the proximal end of the extension arm 40 replaces the extension arm proximal slide shoe 51. The extension arm 40 moves within the guide rail 52 so as to guide the extension arm 40, and its movement in the terminal direction is restricted by the guide rail proximal end stopper 53 of the guide rail 52, so that the extension arm 40 can be lifted up.

Further, an extension arm fixing link 55 is provided to restrain or release the movement of the extension arm 40 when the extension arm 40 is inserted into or removed from the telescopic arm 11 for medium depth use. Pipe fixing links 56 are provided between the constituent pipes to restrict or release movement between the pipes.

The extension arm 40 for large depths of the hydraulic excavator 31 shown in FIG. A small-sized deep-depth work tool (not shown) is attached via the work tool bracket 42, and the large-depth work tool is, for example, a 0-capacity work tool.
．． When using a 10 m3 clamshell bucket, it is possible to excavate to a deep depth of about 27 m.

Next, a method of attaching the extension arm 40 for deep depth to the telescopic arm 11 for medium depth will be explained with reference to FIGS. 1 to 6.

■ Inserting and fixing the extension tip pipe into the extension intermediate pipe (transportation state of the extension arm) a. After fully inserting the extended end pipe 40n into the extended intermediate pipe 40a using the pipe fixing link 56, the extended end pipe 40n is fixed (a working tool bracket 42 is attached to the end of the extended end pipe 40n). b. Support ropes 23, 23 each having one end fixed to the base end of the extended intermediate pipe 40a and the extended end pipe 40n.
A hydraulic hose (not shown) for a working tool is tied and fixed near the tip of the extended intermediate pipe 40a.

■ Replacing the bracket a. The bucket at the tip of the telescopic arm 11 (0.25 m3
) and replace the work tool bracket (not shown) with the extension arm bracket 41.

■ Preparation for inserting the tip of the extension arm 40 into the pipe a. The telescopic arm 11 for medium depth is vertically erected, and the lifting roller 54 attached to the extension arm bracket 41 is connected to the guide rail 52 at the base end of the extended intermediate pipe 40a. b. The lifting roller 54 is moved along the guide rail 52 to the guide rail base end end stopper 53.

■ Boom raising a. Raise the boom 32 while keeping the arm cylinder 33 fixed. b. The extension arm 40 is stopped at a position where it is in line with the telescopic arm 11 for medium depth. At this time, the tip of the extension arm 40 slides on the ground and is pulled.

■ Extension of tip pipe a. The operation of the drive drum 12 extends the tip pipe 11n to the tip of the extended intermediate pipe 40a (the dotted line in FIG. 3 shows the extended state of the tip pipe 11n). b. The extension intermediate pipe 40a is fixed to the tip pipe 11n with an extension arm fixing link 55. c. The tip pipe 11n is minimized.

■ Connection of rope and hydraulic hose a. After the telescoping arm/extension arm is moved to the inspection position shown in FIG. 6 and placed flat, the extension arm fixing link 55 and the pipe fixing link 56 are removed. b. A hydraulic hose for a power tool (not shown), one end of which is connected to the base end of the extended tip pipe 40n, is connected to the tip pipe 11n.
Connect to the hydraulic power source at the tip of the c. Support ropes 23, 23, each having one end fixed to the proximal end of the extended intermediate pipe and the extended tip pipe, are fixed to the distal ends of the intermediate pipe 11b and the tip pipe 11n, respectively. d. Connect the terminal thimble of the retracting rope 13 to the tip pipe 11n.
The distal end pipe 40 extends from the proximal end (indicated by the dotted line in Fig. 1).
n (as shown by the solid line in FIG. 1) or to the proximal end of the extended intermediate pipe 40a (FIG. 2). e. The extrusion rope 14 is wound around the extension preparation driven wheel 17 (FIG. 1) provided at the base end of the base pipe 11a as shown by the dotted line. It is moved to the base end of the pipe 11b. Alternatively, the end thimble of the extruded rope 14, which was fixed as shown by the dotted line, to the extension preparation fixing point 18 (FIG. 2) provided at the proximal end of the proximal pipe 11a, is attached to the intermediate pipe 11 as shown by the solid line.
Move and fix to the proximal end of b.

■Installing the bucket (0.10m3) a. The telescopic arm 11 for medium depth and the extension arm 40 are set vertically. b. Since the power tool bracket 42 is already attached to the tip of the extension tip pipe 40n, attach the bucket (0.
10m3) (not shown).

When the extension arm 40 for large depths is removed and restored to the telescopic arm 11 for medium depths, it can be carried out in the reverse order of the method for attaching the extension arm 40 for large depths described above. Regarding the above-mentioned extension arm 40 for large depths, a two-stage type equipped with one extension intermediate pipe 40a is illustrated, but an extension arm 40 without an extension intermediate pipe or with two
It can also be of a multi-stage type with more than one extended intermediate pipe.

[0028]

[Effects of the Invention] Since the telescopic arm for both medium and large depths for construction machines according to the present invention is constructed as described above,
When using a hydraulic excavator equipped with a medium-depth telescopic arm for frequently used medium-depth work, use a relatively large-capacity work tool, and if necessary, use a relatively large-capacity work tool. An extension arm for deep depth can be attached, which makes the work tool smaller but allows for work at greater depths. Also, an extension arm for deep depth can be easily attached to the telescopic arm for medium depth by oneself. can do.

[Brief explanation of the drawing]

[Figure 1] The solid line is a schematic cross-sectional side view when the extension arm is attached to the telescopic arm for medium depth and the other end of the retraction rope is fixed to the base end of the extension tip pipe, and the dotted line is the extension arm attached. This is for when you don't do it.

[Figure 2] The solid line is a schematic cross-sectional side view when the extension arm is attached to the telescopic arm for medium depth and the other end of the retraction rope is fixed to the base end of the extension intermediate pipe, and the dotted line is the extension arm attached. This is for when you don't do it.

FIG. 3 is a side view showing a state in which an extension arm is attached to a medium-depth telescopic arm attached to a hydraulic excavator.

4 is a side view of an embodiment of the connecting part of the telescopic arm for medium depth and the extension arm in FIG. 3, (A) shows the extension arm placed on the ground, and (B) shows the extension arm The figure is shown being lifted up by the lifting rollers.

FIG. 5 is an enlarged cross-sectional view taken along the X arrow in FIG. 4B.

FIG. 6 is a side view showing the inspection posture when the extension arm is attached to the telescopic arm for medium depth.

7(A) is a diagrammatic cross-sectional side view of a conventional telescoping arm, and FIG. 7(B) is a front view of FIG. 7(A).

FIG. 8(A) is a diagrammatic cross-sectional side view of a modified example of the conventional telescopic arm, and FIG. 8(B) is a front view of FIG. 8(A).

[Explanation of symbols] 11 Telescopic arm 11a Base end pipe 11b Intermediate pipe 11n Tip pipe 12 Drive drum 12a Drive drum 13 Retraction rope 14 Pushing rope 15 Base end pipe tip driven wheel 16 Driving driven wheel 17 Extension preparation driven wheel 18 Extension preparation Fixed point 21 Support driven wheel 22 Support rope 23 Support rope 24 Support rope 31 Hydraulic excavator 32 Boom 33 Arm cylinder 40 Extension arm 40a Extension intermediate pipe 40n Extension tip pipe 41 Extension arm bracket 42 Work tool bracket 51 Extension arm base End slide shoe 52 Guide rail 53 Guide rail proximal end stopper 54 Lifting roller 55 Extension arm fixing link 56 Pipe fixing link

Claims (3)

[Claims] [Claim 1] A distal pipe is sequentially telescopically telescopically telescopically inserted into a proximal pipe attached to a construction machine via one or more intermediate pipes, and is installed at the proximal end of the proximal pipe. A pull-in rope and a push-out rope are wound around a reversible driving drum, one end of which is fixed to the drive drum, and when one is wound up, the other is sent out at the same length or at a constant rate, and the other end of the pull-in rope is attached to the tip pipe or the extrusion rope. The pushing rope is fixed to the proximal end of the intermediate pipe close to the proximal pipe, and the pushing rope is wound around the proximal pipe tip driven wheel at the distal end of the proximal pipe, and then connected to the distal end of the proximal pipe and the proximal pipe. It is wound between the proximal ends of the adjacent intermediate pipes a necessary number of times via a driving driven wheel, and the other end is fixed to the proximal end or the distal end of both pipes, while the distal end of the intermediate pipe or One end of the support rope is fixed to each type of pipe immediately adjacent to the inside through supporting driven wheels installed at both ends of the proximal end and the distal end.The other end of the support rope is fixed to each type of pipe immediately adjacent to the outside. As a result, the extrusion rope, the retraction rope, and the support rope work together to equalize the amount of expansion and contraction between the various pipes adjacent to each other, and to push out or retract the tip pipe with respect to the proximal pipe. In a medium-depth telescoping arm of a construction machine, in which an extrusion/retraction device for adjacent pipes is provided at regular intervals, and a relatively large work tool is attached to the tip of the tip pipe, the relatively large inserting into the tip pipe an extension arm in which the extension tip pipe is telescopically assembled sequentially via only the extension tip pipe or one or more intermediate extension pipes without attaching a working tool; In order to make the amount of expansion and contraction between the various types of pipes adjacent to each other equal, and to push out or retract the extension tip pipe with respect to the base end pipe, an extension adjacent pipe extrusion/retraction device is installed at equal intervals between the adjacent pipes of the medium-depth telescopic arm. The extension is configured substantially similar to an equidistant push-out retraction device, such that a relatively small working tool is attached to the distal end of the extended tip pipe, thereby allowing the medium-depth telescoping arm to be extended as required. A telescopic arm for construction machinery that can be used at both medium and large depths, and is characterized by its ability to perform work at depth. 2. The telescoping arm for medium-depth and large-depth construction machinery according to claim 1, wherein a slide shoe at the base end of the extension arm slides and guides the base end of the extension arm within the tip pipe. A guide rail extending from the base end of the extension arm to the proximal end of the extension arm is attached, and a lifting roller is rotatably attached to the inner side of the tip end of the tip pipe so as to protrude from the tip end, and the extension arm is moved into the tip pipe. When attaching and detaching, the lifting roller is inserted into the guide rail and moves within the guide rail, and the extension arm proximal end slide shoe is inserted into the extension arm before it enters the tip pipe or when it comes out from the tip pipe. A guide rail base end stopper is installed at the base end of the guide rail to guide the base end of the extension arm in place of the arm base end slide shoe, and to prevent movement of the lifting roller in the terminal direction. and lifting the extension arm by the lifting roller, and an extension arm fixing link and an extension arm for restraining and releasing movement of the extension arm with respect to the medium depth telescoping arm. A telescoping arm for both medium and large depths for construction machinery that has pipe fixing links that restrict and release movement between the constituent pipes. 3. In the telescopic arm for both medium and large depths of the construction machine according to claim 1, the other end of the push-out rope is wound around the distal end driven wheel of the proximal pipe and then attached to the distal end of the proximal pipe. and the proximal end of the intermediate pipe adjacent to the proximal pipe, the extrusion rope is wound a necessary number of times via a driving driven wheel, and the extrusion rope is further wound in order to facilitate the winding of the extruded rope when attaching and detaching the extension arm. Depending on the number of pipes constituting the extension arm, the base end pipe can be wound as many times as necessary via an extension preparation driven wheel provided at the proximal end or the distal end of the base end pipe, or by providing an extension preparation fixing point. A telescopic arm for both medium and large depths for construction machinery that is fixed to the base or tip of a pipe.