JPH11101002A - Cutting work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To go to a construction site where a building such as an apartment house is to be demolished and to cut waste steel to be discarded without using other heavy machines at the site. SOLUTION: This cutting work vehicle is provided with slewing and derricking booms 14 and 15 provided at a car body part 2 of a self-running work vehicle, an opening/closing cutting arm means 16 provided at the front end of the booms 14 and 15, and a hydraulic driving system for opening/closing and driving the cutting arm means 16. In this case, the cutting arm means 16 is provided with a shearing blade part 24 arranged close to the base of the axial fulcrum of a pair of axially driving opening/closing arms and a holding part 25 for an object, provided at the front end of opening/closing of the axially driving opening/closing arm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting work vehicle for cutting on-site waste steel materials discarded when a building such as an apartment is dismantled.

[0002]

2. Description of the Related Art In recent years, buildings such as condominiums and the like made of old reinforced concrete or steel reinforced concrete having passed their durability have been dismantled. From these demolition sites, in addition to concrete, a large number of waste steel materials such as steel frames and reinforcing bars are produced. In order to use these waste steel materials as resources, it is common to cut them into a desired size specified by a steel maker and handle them as iron scraps.

[0003] Conventionally, waste steel material, which is a resource, is loaded on a large truck using heavy equipment at a building demolition site.
It is transported to the work site of an iron scrap wholesaler. At a work site of an iron scrap wholesaler, heavy steel is used to drop waste steel from a heavy truck bed, cut into a desired size by a cutting machine equipped with a guillotine, and processed into iron scrap. This is loaded on a truck again, transported to a steel maker, and unloaded.

[0004]

The transportation and unloading of these repeated waste steel materials requires a lot of financial burden and a lot of security.

[0005] The present invention has been made in view of the above points, and goes to a work site where buildings such as condominiums are dismantled, and cuts waste steel materials discarded without using other heavy equipment at the work site. The purpose is to obtain a cutting work vehicle that can do. Another object of the present invention is to provide a cutting work vehicle capable of reliably cutting according to the hardness, size and length of the waste steel material. It is another object of the present invention to provide a cutting work vehicle that facilitates replacement of a blade worn by cutting. Another object is to obtain a cutting work vehicle capable of cutting even harder waste steel material.

[0006]

According to a first aspect of the present invention, there is provided a cutting work vehicle, comprising: a boom provided on a vehicle body of a self-propelled work vehicle so as to be able to turn and lie down; A cutting work vehicle provided with an opening / closing cutting arm means provided on the base and a fluid pressure drive system for driving the cutting arm means to open / close, wherein the cutting arm means is located near a pivot point side base of a pair of pivoting opening / closing arms. It is provided with a shearing blade portion provided and a work object holding portion provided at the opening and closing tip of the pivoting opening and closing arm.

[0007] In the cutting work vehicle according to the second aspect of the present invention, at least one of the pivoting opening / closing arms has a shearing blade portion depressed in an arcuate shape.

According to a third aspect of the present invention, there is provided a cutting work vehicle, wherein the opening / closing cutting arm means includes a turning-side arm which is turned around a pivot point by a fluid pressure driving system, and a tip of a boom. And a frame-shaped fixed arm that allows the rotation arm to pass therethrough, wherein the rotation arm is disposed at a gentle downward angle with respect to the holding portion at the tip end of the first shearing blade portion. And a second shearing blade portion arranged at a gentle return angle with respect to the first shearing blade portion, and arranged at a gentle rising angle with respect to the second shearing blade portion, which is arranged substantially parallel to the holding portion. Third
A shearing blade portion, wherein the fixed-side arm is disposed at a gentle downward angle with respect to a holding portion at the tip, and a shearing portion is formed by sliding with the first shearing blade portion with rotation of the rotation-side arm. And a fourth shearing blade portion, which is disposed at a gentle return angle with respect to the fourth shearing blade portion and substantially in parallel with the holding portion, and rotates with the second shearing blade portion along with the rotation of the rotation-side arm. A fifth shearing blade portion forming a shearing portion by rubbing, and a fifth shearing blade portion disposed at a gentle rising angle with respect to the fifth shearing blade portion, and rubbing with the third shearing blade portion along with rotation of the rotation-side arm. And a sixth shearing blade portion forming a shearing portion according to the above.

According to a fourth aspect of the present invention, there is provided a cutting work vehicle, wherein at least a part of each of the shearing blades is formed of a replaceable blade.

A cutting work vehicle according to a fifth aspect of the present invention is the cutting work vehicle according to any one of the first to fourth aspects, wherein a pair of support arms for supporting a work object from below at the time of cutting. And the pair of support arms are arranged between the arms so that the cutting arm can enter.

In the cutting work vehicle according to the invention described in claim 6, the pair of support arms are installed on the vehicle body so as to be openable and closable.

According to a seventh aspect of the present invention, there is provided a cutting work vehicle having a locking piece for preventing a work object from deviating from an upper end of each of the pair of support arms. It is.

In the cutting work vehicle according to the present invention, the locking portion piece is erected with its upper part inclined toward the work vehicle.

According to a ninth aspect of the present invention, there is provided a cutting work vehicle according to any one of the first to fourth aspects, wherein the fluid pressure drive system controls the discharge pressure of the fluid to be higher or lower. The pressure can be switched.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION A cutting work vehicle according to the present invention goes to a site where a building such as an apartment building is dismantled, and turns to a body part of a self-propelled work vehicle in order to cut waste steel at the site. A boom provided so as to be able to lie down, an open / close cutting arm means provided at a tip end of the boom, and a fluid pressure drive system for opening / closing the cutting arm means.

The self-propelled work vehicle is capable of moving at least within the site, and is preferably a vehicle that can run on a public road by itself or loaded on a tow truck when going to the site. For example, when the vehicle is capable of running on a public road by itself, the vehicle is provided with the boom and the open / close cutting arm means within the vehicle length, vehicle width, and vehicle height specified in the relevant laws and regulations. In addition, in the case of a vehicle loaded and transported by the towing vehicle amount, a hydraulic backhoe can be generally used.

In particular, the cutting work vehicle according to the present invention is provided with a cutting blade provided near a pivot base side of a pair of pivoting opening / closing arms and a tip end of the pivoting opening / closing arm as cutting arm means. And a holding portion for the work object. As a result, it is possible to go to a work site where buildings such as condominiums are dismantled, and cut waste steel materials that are discarded without using other heavy equipment at the work site.

In the cutting work vehicle according to the present invention, at least one of the pivotable opening / closing arms has a shearing blade portion that is depressed in an arcuate shape. That is, since the shearing blade portion is depressed in an arcuate shape, the shearing blade portion having a gentle downward angle with respect to the work object holding portion provided at the opening / closing end portion, and the working object holding portion. And a substantially parallel shearing blade portion, and a shearing blade portion having a gentle rising angle with respect to the work object holding portion.
As a result, three different types of cutting can be performed on the work target.

As a preferred example, the opening / closing cutting arm means is fixed to a rotating arm pivoted about a pivot point by a fluid pressure driving system and a tip of a boom to permit passage of the rotating arm. A first shearing blade arranged at a gentle lowering angle with respect to the holding portion at the tip; and a gently moving arm relative to the first shearing blade. A second shearing blade portion disposed at a return angle and substantially parallel to the holding portion; and a third shearing blade portion disposed at a gentle rising angle with respect to the second shearing blade portion; An arm disposed at a gentle lowering angle with respect to the holding portion at the tip, and a fourth shearing blade portion forming a shearing portion by sliding with the first shearing blade portion as the rotating arm rotates; It is disposed at a gentle return angle to the fourth shearing blade portion and substantially parallel to the holding portion, and A fifth shearing blade portion that forms a shearing portion due to sliding with the second shearing blade portion as the side arm rotates; and a fifth rising blade portion is disposed at a gentle rising angle with respect to the fifth shearing blade portion. And a sixth shearing blade portion that forms a shearing portion due to sliding with the third shearing blade portion with the rotation of.

The shearing portion formed by the sliding between the first shearing blade portion and the fourth shearing blade portion obtains a shearing force toward the pivot point with respect to the work object. Therefore, at the time of cutting, the work target enters deeper as the force is applied to the depth of the cutting arm means, so that the second shear blade portion and the fifth
In combination with the shearing blade portion, the work object can be reliably cut.

On the other hand, the shearing portion formed by the sliding between the third shearing blade portion and the sixth shearing blade portion obtains a shearing force directed outward of the pivot point with respect to the work object. Therefore, at the time of cutting, the work object is connected to the second shearing blade of the cutting arm means and the fifth shearing blade.
A force is applied to the shearing blade. Here, a strong shearing force is obtained by obtaining a resistance against the force toward the second shearing blade portion and the fifth shearing blade portion. About this drag,
Details will be described later.

In the present invention, at least a part of the above-mentioned shearing blade portion comprises a replaceable blade. Thereby, even if the shearing blade portion is worn or the like, the shearing force can be easily recovered. By the way, specifically, as long as it has a bow-shaped shearing blade, preferably, the replacement blade has a shearing blade edge on the front and back surfaces. Thereby, it can be replaced twice by one replacement blade. Further, as in any one of the first to sixth shearing blade portions, if the shearing blade portion does not bend, a shearing blade edge is also provided on the opposing side edge in addition to the front and back surfaces. I do. Thereby, it can be replaced four times by one replacement blade.

The cutting work vehicle of the present invention is provided with a pair of support arms for supporting a work object from below during cutting, and the pair of support arms are arranged between the arms so that the cutting arm can enter. Thus, the work object held by the holding portion of the cutting arm means can be temporarily placed on the support arm and cut by the shear blade of the cutting arm means.

Preferably, the pair of support arms are installed on the vehicle body so as to be openable and closable. Accordingly, the support arm also moves with the movement of the cutting work vehicle, and furthermore, the support arm is opened and closed according to the length of the work object to adjust the interval length between the support arms, so that various dimensions are obtained. Good support at the time of cutting a work object having a shape can be obtained.

The cutting work vehicle according to the present invention is provided with a locking piece protruding upward at each of the distal ends of the pair of support arms for preventing the work object from deviating. This is the drag shown in the examples of the above-described bowed concave shearing blade portion and the above-described shearing portion formed by sliding between the third shearing blade portion and the sixth shearing blade portion. In other words, the pivot point side of the shearing blade portion depressed in an arc shape or the third
In the shearing portion formed by the friction between the shearing blade portion and the sixth shearing blade portion, the work object moves in a direction deviating from the shearing portion when the pivotal opening / closing arm of the cutting arm means is closed. For this reason, the locking piece protruding upward from each of the distal ends of the pair of support arms prevents the work object from deviating at the time of closing. Thereby, the work target can be easily cut.

In particular, in the case where the locking piece is set upright with the upper part inclined toward the work vehicle, the cutting arm means mounted on the work vehicle can be pushed in to shear the work object, so that the work object can be further sheared. And the cutting force is increased several times.

In the cutting work vehicle of the present invention, preferably, the fluid pressure driving system for opening and closing the cutting arm means can switch the discharge pressure of the fluid between high and low pressures. The switching of the discharge pressure between high and low pressures may be, for example, a combination of two hydraulic pumps or switching the output of one variable displacement hydraulic pump as long as the discharge pressure can be switched between high and low pressures. It can also be obtained by:

For example, the switching between high and low pressures is configured such that if the lever is gripped by hand or the lever is stepped on by foot, another powerful hydraulic pump works to increase the hydraulic pressure. As a result, the speed at the time of grasping and gripping the work object and at the time of other rotations is generally the same as that of a normal backhoe nibble, but when cutting the work object, the hydraulic pressure is switched to a higher value, and the cutting force is reduced. The power is several times higher than normal, and it is designed to turn into a powerful cutter at the moment. When the lever is returned, it returns to the normal nibbler gripping force.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings, but the present invention is not limited to this embodiment. FIG. 1 is an explanatory view showing an entire configuration of an embodiment of a cutting work vehicle according to the present invention, wherein FIG. 1A is a front view and FIG. 1B is a plan view. FIG. 2 is an explanatory view showing the configuration of the open / close cutting arm means of the cutting work vehicle shown in FIG. 1, wherein FIG. 2A is a front view and FIG. 2B is a plan view.

As shown in FIG. 1, there is a cutting work vehicle 10 capable of self-running by a so-called caterpillar 11. The cutting work vehicle 10 includes an operating cabin 13 and booms 14 and 15 installed on a revolving plate in front of the upper part of the vehicle body 12, and the boom is provided so as to be able to protrude with some hydraulic pistons. First
It comprises a boom 14 and a second boom 15. An opening and closing cutting arm means 16 for cutting waste steel is provided at the tip of the second boom.

A hydraulic pressure generating device 17 is provided behind the driving cabin 13 and drives hydraulic pistons arranged in various parts of the working vehicle with the generated hydraulic pressure. Further, a pair of support arms 18 that can be opened and closed by a hydraulic piston (not shown) are provided in front of the vehicle body 12. At each end of the support arm 18, a locking portion piece 19 is provided upright with the upper part prevailing on the work vehicle side.

The vehicle body of the cutting work vehicle 10 can be accommodated in a vehicle length, a vehicle width, and a vehicle height that can be driven on a public road, and when traveling on a public road, the first boom 14 and the second boom 15 are disconnected. The arm means 16 is folded and turned down with the vehicle body side, and the support arm 18 is raised at the front end so as not to hinder running. Accordingly, it is possible to quickly go to a work site where buildings such as condominiums are dismantled without loading on trucks or trainers.

The cutting arm means 16 includes a pivot arm 21 pivoted about a pivot point 23 and a second boom 15.
And a pair of pivoting opening / closing arms 21 of a frame-shaped fixed side arm 22 that is fixed to the tip of
22 are installed. Each of the turning side arm 21 and the fixed side arm 22 has a shearing blade portion 24 disposed on the pivot point 23 side, and a work object holding portion provided at the opening / closing end of the pivoting opening / closing arms 21 and 22. 25.

In the cutting work by the cutting work vehicle 10, the work object held by the holding portion 25 of the cutting arm means 16 is temporarily placed on the support arm 18, -The cutting is performed by the sixth shearing blades 26 to 31. Since the pair of support arms 18 can be opened and closed, by opening and closing the support arms 18 according to the length of the work object and adjusting the interval length between the support arms, the work object having various dimensions and shapes can be formed. Good support at the time of cutting is obtained.

Each of the tips of the pair of support arms 18 has
The provision of the locking piece 19 projecting upward prevents the work object from deviating from the shearing portion during cutting.

As shown in FIG. 2, the shear blade portion 24 of each arm has a configuration depressed like an arc. That is,
Each of the shearing blades 24 has shear blades 26 and 29 having a gentle downward angle with respect to the work object holding portion 25 provided at the opening / closing front end portion, and is substantially parallel to the work object holding portion. It is configured to have an arcuate concave shape having shear blade portions 27, 30 and shear blade portions 28, 31 having a gentle rising angle with respect to the work object holding portion 25. As a result, three different types of cutting can be performed on the work target.

That is, the rotating arm 21 has a first shearing blade portion 26 disposed at a gentle downward angle with respect to the holding portion 25 at the tip, and a gentle return angle with respect to the first shearing blade portion 26. An arcuate shape comprising a second shearing blade portion 27 disposed and arranged substantially in parallel with the holding portion 25 and a third shearing blade portion 28 disposed at a gentle rising angle with respect to the second shearing blade portion 27. A shearing blade, and these shearing blades are
Prepare on both sides.

The fixed arm 22 is formed in a frame shape that allows the rotation arm 21 to pass through. A fourth shearing blade portion 29 disposed at an angle and a holding portion 25 disposed at a gentle return angle with respect to the fourth shearing blade portion 29;
And a sixth shearing blade part 31 disposed at a gentle rising angle with respect to the fifth shearing blade part 30.

The first and fourth shearing blades 26 and 29 form a shearing portion that is directed in the direction of the pivot point by sliding with the rotation of the turning-side arm 21. The fifth shearing blade portion 30 forms a substantially vertical shearing portion by rubbing, and the third shearing blade portion 28 and the sixth shearing blade portion 31 form a shearing portion that is directed outward from the pivot point by rubbing. Form.

The shearing portion formed by the sliding between the first shearing blade portion 26 and the fourth shearing blade portion 29 obtains a shearing force toward the pivot point with respect to the work object. Therefore, at the time of cutting, the work target enters deeper as the force is applied to the depth of the cutting arm means 16 in the depth direction, so that the second shear blade portion 27 and the fifth shear blade portion 30, The work object can be reliably cut.

On the other hand, the third shear blade 28 and the sixth shear blade 3
The shearing portion formed by rubbing with 1 obtains a shearing force directed outward of the pivot point with respect to the work object. Therefore, at the time of cutting, the work target is the second arm of the cutting arm means 16.
A force is applied to the shearing blade 27 and the fifth shearing blade 30.
In the case where the work object is cut laterally on the support arm 18, the locking piece 1 provided at the tip of the support arm 18 is used.
9 prevents the work object from deviating due to the shearing portion formed by the sliding between the third shearing blade portion 28 and the sixth shearing blade portion 31. Thereby, the work target can be easily cut. In particular, since the locking piece 19 is erected with the upper part inclined toward the work vehicle, the cutting arm means can be pushed in to shear the work object, so that more force is applied and the cutting force is reduced. It will be doubled.

As shown in FIG. 2, the first to sixth shearing blades 26 to 31 provided on the cutting arm means 16 are replaceable blades. In the shearing blade portion without bending as in the first to sixth shearing blade portions 26 to 31, by using a replaceable blade having a shearing blade edge on the opposite side edge in addition to the front and back surfaces, It can be replaced four times with one replacement blade. When the first to third shearing blades and the fourth to sixth shearing blades are formed by a single replacement blade, the edge of the shearing blade which is depressed in a bow shape on the front and back surfaces is formed. By doing so, it can be replaced twice with one replacement blade. Thereby, even if the shearing blade portion is worn or the like, the shearing force can be easily recovered.

Although not shown, the hydraulic pressure generating device 17 of the cutting work vehicle 10 includes a main hydraulic pressure generating pump and a sub-hydraulic pressure generating pump for increasing the driving hydraulic pressure of the cutting arm means at the time of cutting. As a result, the discharge pressure of the hydraulic pressure can be switched between high and low. Note that the switching between the high and low pressures of the discharge pressure is not limited to the combination of two hydraulic pumps as long as the discharge pressure can be switched at least between the high and low pressures. For example, it can be performed by switching the output of one variable displacement hydraulic pump.

Switching between high and low hydraulic pressures is performed in the operating cabin 1.
3 is operated by operating the lever. As a result, the speed at the time of grasping and gripping the work object and at the time of other rotations is generally the same as that of a normal backhoe nibble, but when cutting the work object, the hydraulic pressure is switched to a higher value, and the cutting force is reduced. The power is several times higher than normal, and it is designed to turn into a powerful cutter at the moment. When the lever is returned, it returns to the normal nibbler gripping force.

[0045]

As described above, the present invention goes to a work site for dismantling buildings such as condominiums, and is capable of cutting waste steel materials discarded without using other heavy equipment at the work site. You can get a car. Further, it is possible to obtain a cutting work vehicle capable of reliably cutting according to the hardness, size and length of the waste steel material. Further, it is possible to obtain a cutting work vehicle that facilitates replacement of a blade worn by cutting. Further, a cutting work vehicle capable of cutting even harder waste steel material can be obtained. Further according to the invention,
Since the transport of waste steel by large trucks, which was conventionally required, can be omitted, waste steel can be transported directly from the dismantling site to small steelmakers by small trucks. An effect can be achieved.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing the overall configuration of an embodiment of a cutting work vehicle according to the present invention, wherein FIG. 1A is a front view and FIG. 1B is a plan view.

2 is an explanatory view showing a configuration of a cutting arm means of the cutting work vehicle shown in FIG. 1, wherein FIG. 2A is a front view and FIG. 2B is a plan view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Cutting work vehicle, 11 ... Caterpillar, 12 ... Body part, 13 ... Driving cabin, 14 ... 1st boom, 15 ... 2nd boom, 16 ... Opening / closing cutting arm means, 17 ... Hydraulic generator, 18 ... Support arm, Reference numeral 19: locking piece, 21: rotating arm, 22: fixed arm, 23: pivot point, 24: shearing blade, 25: clamping part for work object, 26: first shearing blade, 27 ... 2nd shearing blade section, 28 ... third shearing blade section, 29 ... 4th shearing blade section, 30 ... 5th shearing blade section, 31 ... 6th shearing blade section,

Claims (9)

[Claims] 1. A boom provided on a vehicle body portion of a self-propelled work vehicle so as to be capable of turning and raising and lowering, open / close cutting arm means provided at a tip end of the boom, and a fluid pressure for driving the cutting arm means to open / close. In a cutting work vehicle provided with a drive system, the cutting arm means is provided at a shearing blade portion disposed near a pivot base side base of the pair of pivoting opening / closing arms, and at an opening / closing tip of the pivoting opening / closing arm. A cutting work vehicle, comprising: a holding portion for a work object. 2. The cutting work vehicle according to claim 1, wherein at least one of the pivotable opening / closing arms has a shearing blade portion depressed in an arcuate shape. 3. The open / close cutting arm means is pivotally pivoted about a pivot point by a fluid pressure drive system, and a frame fixed to the tip of a boom to allow passage of the pivotable arm. A stationary side arm, wherein the rotating side arm has a first shearing blade portion disposed at a gentle downward angle with respect to a holding portion at the tip, and a gentle return angle with respect to the first shearing blade portion. And a second shearing blade portion disposed substantially in parallel with the holding portion; and a third shearing blade portion disposed at a gentle rising angle with respect to the second shearing blade portion. A fourth shearing blade portion arranged at a gentle downward angle with respect to the holding portion at the distal end and forming a shearing portion by sliding with the first shearing blade portion as the rotating arm rotates; It is arranged at a gentle return angle to the shearing blade part and almost parallel to the holding part, and A fifth shearing blade portion that forms a shearing portion due to sliding with the second shearing blade portion with the rotation, and is disposed at a gentle rising angle with respect to the fifth shearing blade portion; The cutting work vehicle according to claim 1, further comprising: a sixth shearing blade portion that forms a shearing portion by sliding with the third shearing blade portion. 4. The apparatus according to claim 1, wherein at least a part of each of the shearing blades comprises a replaceable blade.
A cutting work vehicle according to any one of claims 1 to 3. 5. The cutting work vehicle according to claim 1, further comprising a pair of support arms for supporting a work object from below at the time of cutting, wherein the pair of support arms are provided between the arms. A cutting work vehicle, wherein a cutting arm is provided so as to be able to enter the cutting arm. 6. The cutting work vehicle according to claim 5, wherein the pair of support arms are installed on the vehicle body so as to be openable and closable. 7. The cutting device according to claim 5, wherein each of the pair of support arms has a locking piece protruding upward from the tip of each of the support arms for preventing the work object from deviating. Working vehicle. 8. The cutting work vehicle according to claim 7, wherein the locking piece is erected with its upper part inclined toward the work vehicle. 9. The cutting work vehicle according to claim 1, wherein the fluid pressure drive system is capable of switching the discharge pressure of the fluid between high and low pressures. .