JPH0715887Y2 - Concrete wall crane - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention provides a new concrete for paving a concrete structure or a concrete wall forming a road side slope, a tunnel inner surface, or the like, or for repairing. The concrete wall surface used when cutting the concrete wall surface to apply the etc. relates to a fishing machine.

(Prior Art) As shown in FIG. 12, a conventional concrete wall surface lifter has a cutting device 9 attached to the tip of an arm 8 of a hydraulic excavator 1. That is, the hydraulic excavator 1 is
An upper revolving structure 4 is installed on a lower traveling structure 2 through a revolving device 3, a boom 6 which is undulated by a boom cylinder 5 is attached to the upper revolving structure 4, and a boom 6 is pivoted by an arm cylinder 7 at an end of the boom 6. The excavation bucket is usually attached to the tip of the arm 8. However, when the concrete wall surface is configured as a fishing machine, the cutting device 9 is replaced by the bucket cylinder 10 in the vertical direction instead of the excavation bucket. It is attached so that it can be swung freely. The cutting device 9 has a hydraulic motor 11 and a cutting tool 12 rotated by the hydraulic motor 11.

When the concrete wall surface 13 is cut by this chipping machine, the cutting tool 12 is moved along the concrete wall surface 13 by the ups and downs of the boom 6 by the expansion and contraction of the boom cylinder 5 and the rotation of the arm 8 by the expansion and contraction of the arm cylinder 7. While cutting the surface.

(Problems to be solved by the invention) As described above, in the cutting work by the conventional chipping machine, it is necessary to move the cutting tool 12 along the concrete wall surface 13 by the combined operation of the rotation of the boom 6 and the arm 8. If the concrete wall surface 13 has irregularities, a cutting tool along the wall surface 13
It requires a lot of skill to move 12 and is a nerve-intensive task, so the burden on the operator is heavy, and if the operation technique is inadequate, the wall surface 13 cannot be evenly cut, and the cutting tool 12 When the tool is pressed against the wall surface 13 with a strong force, the load on the cutting device 9 increases, and the life of the cutting device 9 is shortened. Further, since the cutting device 9 is attached to the tip of the arm 8 of the hydraulic excavator 1, only the wall surface of the hydraulic excavator 1 apart from the lower traveling body 2 can be cut, which makes it difficult to perform cutting work in a narrow space. There was a point.

The present invention has been made in view of these problems,
The purpose is that even if the operation technology is immature,
It is an object of the present invention to provide a concrete wall fishing machine that can evenly cut a concrete wall surface, significantly reduce the work load on the operator, and facilitate cutting work in a narrow space.

(Means for Solving the Problem) In order to achieve this object, the present invention uses a hydraulic excavator as a base machine, and mounts an outer cylinder of a telescopic arm that is expanded and contracted by a hydraulic pressing cylinder on the upper surface of the boom. A bracket is attached to the center of the inner cylinder of the telescopic arm so as to be rotated left and right by a hydraulic horizontal rotating cylinder about the vertical axis, and the bracket has a motor for driving the rotary cutting tool and the excavating tool. Install a cutting device,
In the hydraulic circuit to which pressure oil is supplied when the pressing cylinder extends between the pressing cylinder and its control valve,
A relief valve for setting the pressing force of the rotary cutting tool against the concrete wall surface is provided.

As a suitable mounting structure of the cutting device according to the present invention, a structure in which an elastic rubber is interposed between the bracket and the frame of the cutting device, or a connecting portion between the bracket and the frame of the cutting device is used as the cutting device. The structure is such that the rotation axis of the can be changed so as to be oriented horizontally or vertically.

Further, as a preferable mounting structure for the telescopic arm according to the present invention, a bracket having pin holes is provided on the front and rear of the outer cylinder, and both brackets are provided with arm mounting holes at the tip of the boom
There is a structure in which the arm cylinder mounting bracket on the top surface of the boom is used for pin attachment, and at least one of the brackets is detachably bolted to the outer cylinder.

(Operation) Since the present invention has the above-mentioned structure, the boom is raised and lowered while the pressing cylinder is extended and the control valve is switched in the extension direction, and the boom is moved along the concrete wall surface while rotating the rotary cutting tool. Then, the rotary cutting tool is pressed against the concrete wall surface with a constant pressing force determined by the pressure set in the relief valve to perform cutting. Further, when the concrete wall surface has irregularities, the rotary cutting tool moves following the irregularities due to expansion and contraction of the pressing cylinder.

In the structure in which the elastic rubber is interposed between the bracket and the frame of the cutting device, the impact applied to the rotary cutting tool is mitigated by the elastic rubber, and the deformation of the elastic rubber causes unevenness on the concrete wall surface. Following this, the rotary cutting tool moves, and the cutting surface constantly contacts the concrete wall surface.

By changing the connecting parts between the bracket and the frame of the cutting device, the axis of the rotary cutting tool is set not only in the horizontal direction but also in the vertical direction, and the swing device of the hydraulic excavator body is operated to operate the boom together with the upper swing body. And the cutting operation can be performed by rotating the cutting tool.

In addition, brackets with pin holes are provided on the front and rear of the outer cylinder of the telescopic arm, and both brackets are pinned using the arm mounting pin holes on the boom tip and the arm cylinder mounting bracket pin holes on the top of the boom. In addition, when at least one of the brackets has a structure that is detachably bolted to the outer cylinder, the front and rear intervals corresponding to various models can be set as the detachable bracket,
It can be installed on various types of hydraulic excavators.

(Embodiment) FIG. 1 is a side view showing an embodiment of a concrete wall surface lifter according to the present invention, and FIG. 2 is a partially omitted plan view of FIG. In FIGS. 1 and 2, the same reference numerals as those in FIG. 12 indicate the parts that perform the same functions. 14 is an outer cylinder 15 and an inner cylinder 17
These are telescopic arms, each of which has a rectangular cross-sectional shape, the inner cylinder 17 cannot rotate with respect to the outer cylinder 15, and the sliding surface has a sliding member such as hard resin (not shown). )) Is fitted. A bracket 18 having a pin hole is welded to the front end of the outer cylinder 15, and the pin 19 is inserted by aligning the pin hole of the bracket 18 with the arm mounting hole at the tip of the boom 6 to insert the pin 19 into the front portion of the outer cylinder 15. Is fixed to the boom 6. As shown in the side view of FIG. 3 and the rear view of FIG. 4, a bracket 20 is detachably attached to the rear portion of the outer cylinder 15 by a bolt 22 and a nut 23 which are inserted into the attachment holes 24, The outer cylinder 15 is inserted by inserting the pin 27 into which the pin hole 21 of the bracket 20 and the pin hole of the arm cylinder mounting bracket 25 provided on the upper surface of the boom 6 are aligned.
The rear part is fixed to the boom 6. With such a structure, for example, the bracket 20A having a long distance from the mounting surface to the outer cylinder 15 to the pin hole 21 as shown in FIG. ,
The brackets 20 and 20A can be attached according to the distance between the 27, which facilitates compatibility with various hydraulic excavators. The bracket 18 in front of the outer cylinder 15 may be detachably bolted, or both the brackets 18 and 20 may be detachably attached.

In FIG. 1 and FIG. 2, 28 is a hydraulic pressing cylinder, which is built in the telescopic arm 14, the head side of which is connected to the outer cylinder 15 by the pin 30 and the piston rod by the pin 31. It is connected to the inner cylinder 17. The cylinder
28 has a function of expanding and contracting the expandable arm 14, and a function of pressing the rotary cutting tool 12 against the concrete wall surface 13.

A fork portion 32 is provided at the tip of the inner cylinder 17, and the fork portion 32 is
The first bracket 34 is connected to the left and right so as to be rotatable about the vertical axis 33. As shown in Fig. 2, the inner cylinder
A hydraulic horizontal rotation cylinder for adjusting the horizontal angle with respect to the boom 6 by rotating the bracket 34, that is, the cutting device 9 to the left and right, between these tip portions of the 17 and the first bracket 34. 35 is installed.

6 and 7 are a plan view and a side view showing the details of the cutting device 9 and its mounting portion, respectively. The first bracket 34 is provided with pins 37 and 38 to provide a second bracket 39.
Is attached, and the mating surface 41 of the frame 40 of the cutting device 9 is attached.
And the mating surface 42 of the second bracket 39,
A shock absorber 43 is interposed.

The shock absorber 43 is arranged between the two plates 44 and 45 in the vertical and horizontal directions.
The plate 4 is made up of bolts 47 penetrating the elastic rubbers 46 and nuts 48 screwed to the elastic rubbers 46 with the elastic rubbers 46 interposed therebetween.
4, 45 are tightened, and an elastic rubber 46 is sandwiched between the plates 44, 45. Plate 4 as shown in FIG.
4 and 45 are almost square, and the cutting device 9
Has a hole 49 penetrating the motor 11. Further, these plates 44, 45 have four holes 50 through which the bolts 47 are inserted.
However, the lines connecting these holes 50 are arranged so as to draw a square. In addition, a square mounting base 51 having a hole surrounding the hole 50 is welded to the surface of the portion where the holes 50 are provided on the side opposite to the elastic rubber 46.
Screw holes 52 are provided in the corners.

On the other hand, as shown in FIG. 9, the frame 40 of the cutting device and the mating surfaces 41 and 42 of the second bracket 39 have a hole 49 through which the motor 11 of the cutting device 9 is inserted, as shown in FIG. Screw holes on the mounting base 51 of the plates 44 and 45
A bolt insertion hole 53 is provided at a position corresponding to 52. As shown in FIGS. 6 and 7, the bolt 54 is inserted into these bolt insertion holes 53 and screwed into the screw holes 52 of the mounting base 51 integrated with the plates 44 and 45, whereby the shock absorber 43 is formed.
Is connected to the second bracket 39, and also the cutting device 9
Are coupled to the shock absorber 43.

Reference numeral 55 denotes a support piece having one end welded to the plate 45 of the shock absorber 43 and the other end abutted against the other plate 44.
The force and load applied to the elastic rubber 46 are prevented from being received by the elastic rubber 46. Two pieces are provided on each of the upper, lower, left and right sides of the plate 45.

Bevel gear attached to the output shaft 57 of the motor 11 of the cutting device 9
56 has a structure that meshes with a bevel gear 59 fitted to a rotary shaft 58 of the cutting tool 12, and the cutting tool 12 is rotated by the operation of the motor 11. Here, the rotary shaft 58 of the cutting tool 12 is the telescopic arm 14
In a direction substantially perpendicular to the direction of
Although it is installed horizontally in FIG. 7, the bolt insertion hole 53 and the plate on the mating surface 41 of the frame 40 of the cutting device 9
Since the screw holes 52 of the mounting base 51 of 44 are provided at symmetrical positions with respect to the center line of the mating surface 41 and the upper, lower, left and right sides of the plate 44 respectively, the rotating shaft 58 is changed so as to be oriented vertically. be able to.

FIG. 10 is an electrohydraulic circuit diagram for operating the pressing cylinder 28 of the telescopic arm 14, 60 is a hydraulic pump, 61 is a control valve of the pressing cylinder 28, and 62 is a hydraulic pump.
A relief valve that sets the maximum discharge hydraulic pressure of 60 (for example, set to 170 kg / cm ² ), 63 is a throttle valve that adjusts the expansion / contraction speed of the pressing cylinder 28, and 64 is pressure oil when the pressing cylinder 28 is extended. A relief valve for setting the maximum pressure (pressing force) of the circuit 65 to be supplied (for example, set to 20 kg / cm ² ), 66 is for preventing an abnormal rise in hydraulic pressure of the rod side circuit 67 of the pressing cylinder 28 (for example, setting) Pressure is set to 170kg / cm ² ) Relief valve. Reference numeral 68 is a snap switch for energizing the expansion side and contraction side operation solenoids 70, 72 of the control valve 61 from the battery 73, respectively.

In FIG. 1, 75 and 76 are detectors such as microswitches for detecting that the telescopic arm 14 is in the contraction limit state, the extension limit state or close to these states, and 77 and 78 are detectors of these detectors, respectively. An alarm consisting of a buzzer or a lamp that operates by position detection, and is provided in the driver's cab or the like as shown in the figure.

In this fishing machine, the control valve can be operated by leaving the snap switch 68 shown in FIG. 10 connected to the extension side operation solenoid 70 during work.
With 61 left in the left position, the rotary cutting tool 12 is pressed against the concrete wall surface 13 as shown in FIG. At this time, the pressing force of the cutting tool 12 against the concrete wall surface 13 is set by the relief valve 64 shown in FIG. Then, the concrete wall surface 13 is cut by the rotary excavator 12 by contracting or extending the boom cylinder 5 while rotating the rotary cutter 12 by the motor 11. In this case, the tip of the boom 6 draws an arc shape, but the cutting tool 12 is in a state where the pressing force set by the pressing cylinder 28 is applied and the telescopic arm 14 expands and contracts due to the expansion and contraction of the pressing cylinder 28. By moving along the concrete wall surface 13, the control wall surface 13 is cut to a uniform depth.

Further, in this excavation, since the shock absorbing device 43 made of the elastic rubber 46 is provided between the bracket 39 and the frame 40 of the cutting device 9, according to the unevenness of the left, right, up and down of the concrete wall surface, the shock absorbing device 43 shown in FIGS. As shown by arrows a and b in the figure, the cutting device 9 is slightly bent to the left, right, up, and down, so that the cutting can be performed without difficulty.

Further, as shown in FIG. 2, since a horizontal rotation cylinder 35 for changing the direction of the cutting device 9 is provided between the inner cylinder 17 and the first bracket 34, the concrete wall surface 13 for cutting work is If there are obstacles 74 such as other structures in the vicinity,
The rotary excavator 12 is moved to the concrete wall surface 13 by operating the turning device 3 and swinging the boom 6 to the obstacle 74 side and expanding and contracting the horizontal rotary cylinder 35 as shown by a chain double-dashed line c.
The work can be performed by facing and abutting parallel to A. In addition, even when the work has to be performed facing the concrete wall surface 13B inclined with respect to the hydraulic excavator 1, the rotary cutting tool 12 is adapted to the concrete wall surface 13B by expanding and contracting the horizontal rotation cylinder 35. And can be moved along the wall surface 13B.

Further, as shown in FIG. 11, the rotary cutting tool 12 is attached so that the rotary shaft 58 thereof is oriented vertically, and the turning device 3 is operated to move the cutting device 9 horizontally with the boom 6 as shown by an arrow d. By doing so, cutting by lateral movement is also possible.

Although the present invention has been described above with reference to the embodiments, it is needless to say that various modifications and additions can be made in details when the present invention is carried out.

(Effect of the Invention) According to claim 1, since the rotary excavator is pressed against the concrete wall surface by the constant pressing force of the pressing cylinder determined by the pressure set in the relief valve to perform cutting, the operating technique is achieved. The wall surface is cut to a uniform depth even by an operator who is inexperienced or even if the surface is uneven. Also, because the pressing force is automatically set without paying close attention to adjusting the cutting depth,
The burden on the operator is reduced and the concrete wall cutting work becomes easier. In addition, since the telescopic arm is attached to the boom and the cutting device is attached to the telescopic arm, the concrete wall surface can be used even in a narrow work site, compared to the conventional excavator with the cutting device attached to the tip of the arm. The cutting work of can be done. Further, since the pressing force of the cutting device or the like becomes constant, an excessive force is not applied to the cutting device, which has a life prolonging effect.

According to claim 2, since the elastic rubber is interposed between the bracket and the frame of the cutting device, the impact applied to the rotary cutting tool is alleviated by the elastic rubber, and the deformation of the elastic rubber causes the concrete to be deformed. The rotary cutting tool moves to follow the small irregularities on the wall surface, and the cutting surface is in constant contact with the concrete wall surface, so that natural cutting is performed.

According to a third aspect of the present invention, a joint portion that is detachably joined by a bolt is provided on the mating surface between the bracket and the frame of the cutting device, and each coupling portion is provided so that the cutting device can change the clothes at right angles. Therefore, the axis of the rotary cutting tool is oriented vertically, and the turning device of the hydraulic excavator body is activated to turn the boom and cutting tool together with the upper revolving structure to perform cutting work. A suitable working mode can be taken according to the shape.

According to claim 4, brackets having pin holes are provided in front of and behind the outer cylinder of the telescopic arm, and both brackets are pin-fitted using the arm mounting hole at the boom tip and the pin hole of the arm cylinder mounting bracket on the boom upper surface. In addition to the structure that attaches, at least one bracket is detachably bolted to the outer cylinder, so the front-to-back distance can be set as a bracket corresponding to various models, and it can be installed on hydraulic excavators of various models Therefore, a telescopic arm having a common size and shape can be used, and economy can be achieved.

[Brief description of drawings]

1 to 11 show an embodiment of a concrete wall surface lifter according to the present invention. FIG. 1 is a side view showing the whole in a working state, and FIG. 2 is a partially cutaway plan view of FIG. , FIG. 3 is a side sectional view showing a mounting structure for a boom at the rear part of the telescopic arm, and FIG. 4 is a rear view of the bracket of FIG.
FIG. 5 is a side view showing a modification of the bracket shown in FIG. 3, and FIG.
FIG. 7 is a partially cutaway plan view showing a cutting device and its mounting portion, FIG. 7 is a partially cutaway side view of FIG. 6, FIG. 8 is a front view showing a plate of a shock absorber, and FIG. 9 is a cutting device. FIG. 10 is a rear view showing the mating faces of the frames, FIG. 10 is an electrohydraulic circuit diagram of the pressing cylinder, FIG. 11 is a plan view showing a state in which the cutting device is mounted in a different direction, and FIG. Concrete is a side view showing the fishing machine in a working state. 1: Hydraulic excavator, 2: Undercarriage, 3: Revolving device, 4: Upper revolving structure, 5: Boom cylinder, 6: Boom, 9: Cutting device, 11:
Motor, 12: rotary cutting tool, 13: concrete wall surface, 14:
Telescopic arm, 15: Outer cylinder, 17: Inner cylinder, 18, 20, 20A: Bracket, 19, 27, 30, 31, 37, 38: Pin, 25: Arm cylinder mounting bracket, 28: Push cylinder, 33: Vertical axis,
34: first bracket, 35: horizontal rotation cylinder, 40: frame, 41, 42: mating surface, 43: shock absorber, 44, 45: plate, 46: elastic rubber, 47: bolt, 48: nut, 51 : Mounting base, 52: Screw hole, 53: Bolt insertion hole, 54: Bolt, 61: Control valve, 64: Pressing pressure setting relief valve

Claims (4)

[Scope of utility model registration request] 1. A hydraulic excavator is used as a base machine, and an outer cylinder of a telescopic arm which is telescopically extended by a hydraulic pressing cylinder is attached to an upper surface of a boom of the hydraulic machine. A bracket is attached so as to be rotated right and left by a rotating cylinder, and a cutting device having a rotary cutting tool and a motor for driving the excavating tool is attached to the bracket, and a pressing device between the pressing cylinder and its control valve is installed. A concrete wall surface fishing machine, wherein a relief valve for setting a pressing force of the rotary cutting tool against a concrete wall surface is provided in a hydraulic circuit to which pressure oil is supplied when the pressing cylinder extends. 2. The concrete wall surface remover according to claim 1, wherein an elastic rubber is interposed between the bracket and the frame of the cutting device. 3. The cutting device has a structure in which a cutting tool is attached to a rotary shaft in a direction perpendicular to the direction of the telescopic arm, and a connecting portion between the bracket and a frame of the cutting device is formed. The concrete wall surface fishing machine according to claim 1 or 2, wherein the rotating shaft has a structure that can be changed so that the rotating shaft is oriented horizontally or vertically. 4. A bracket having pin holes is provided on the front and rear of the outer cylinder of the telescopic arm, and both brackets are pinned by using the arm mounting hole at the tip of the boom and the pin hole of the arm cylinder mounting bracket on the upper surface of the boom. With at least one of the front and rear brackets,
The concrete wall surface fishing machine according to any one of claims 1 to 3, wherein the concrete wall surface is detachably bolted to the outer cylinder.