JPH0517925A - Joint cutting machine - Google Patents

Abstract

PURPOSE:To cut a joint with relatively small impact force and pressing force, in the case of a joint cutting machine used in execution work of a concrete dam or the like. CONSTITUTION:A slide arm 10 is slidably mounted to a vertically provided slides arm supporting member 11, and a concrete vibrator 28 is mounted with a joint cutting plate 30 to a point end of the slide arm 10. The concrete vibrator 28 is vibrated to insert the joint cutting plate 30 into concrete while fluidized. In this way, a joint can be cut by small force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint cutting machine used when constructing a concrete dam or the like.

[0002]

2. Description of the Related Art A conventional joint cutting machine has a hydraulic breaker equipped with a joint cutting plate (conventional technique 1), a joint frame is vertically mounted on a guide frame of a bulldozer, and the joint plate is vertically moved by a hydraulic cylinder. (Prior Art 2), a guide cylinder that can be tilted at an arbitrary angle is attached to the tip of a boom of a self-propelled vehicle for civil engineering, and is moved up and down by a hydraulic cylinder attached to the guide cylinder and is vibrated by a vibration motor. There is known one in which a joint cutting plate is attached via a spring (Prior Art 3).

[0003]

Each of the above-mentioned conventional joint cutting machines has the following problems. Prior arts 1 and 2 above
Since all of them cut the joint only by the vibration and downward pressure of the joint cutting plate, a large pressing force and a striking force are required, the noise at the joint cutting is large, and the working efficiency is low.
Further, in the prior art 1, the joint cutting plate holder is severely damaged and maintenance is difficult, and in the conventional technique 2, it is difficult to correct the small position of the joint cutting plate, and the vehicle can be used only for the joint cutting. It was uneconomical because of low utilization rate. Further, since the prior art 3 vibrates the joint cutting plate itself having a large weight, a vibration motor having a relatively large output is required, and the self-propelled vehicle and the boom are made exclusively for the joint cutting machine. There was a problem that it could not be used for other purposes.

[0004]

The joint cutting machine of the present invention is
The above problem is solved by disposing a concrete vibrator along the joint cut plate. That is,
In the joint cutting machine of the present invention, a slide arm is slidably attached to a slide arm supporting member that is erected upright, a frame for attaching the joint cutting plate is attached to the tip of the slide arm, and the base of the joint cutting plate is attached to the frame. The ends are attached and the base ends of a plurality of concrete vibrators arranged along the joint cutting plate are attached. A drive device for sliding the slide arm is attached to the slide arm support member.

The drive device may have a structure capable of sliding a slide arm to pressurize downward, but a hydraulic cylinder is preferable (claim 2). The frame may have a function of mounting the joint cutting plate and the concrete vibrator on the slide arm, but by the upper frame rotatably attached to the slide arm in the vertical direction and the actuator mounted on the upper frame, It is preferable that the lower frame is rotatably attached in the horizontal direction, and a concrete vibrator and a joint cutting plate are attached to the lower frame (claim 3). Further, the slide arm support member may be attached to a tip end of a boom of the self-propelled vehicle for civil engineering so as to be capable of undulating (claim 4). Further, a vertical gauge may be arranged near the actuator of the upper frame.

[0006]

In the joint cutting machine of the present invention, since the concrete vibrator is arranged along the joint cutting plate, the slide arm is pushed downward by the driving device to insert the joint cutting plate and the concrete vibrator into the concrete. When driving the concrete vibrator,
Since concrete is fluidized by the vibration of the vibrator, it is easy to insert the joint cutting board. Then, after inserting to a predetermined depth, the slide arm is raised to raise the joint cutting board and the concrete vibrator to obtain a predetermined joint. Therefore, the joint cutting plate can be inserted into the concrete with a relatively small pressing force, and the joint cutting efficiency is improved. In the invention of claim 3,
The frame can be rotated and rotated in both horizontal and vertical directions. By setting the tilt angle of the slide arm holding member to be vertical and rotating the lower frame, it is possible to accurately align the joint cutting plate. It is possible to cut joints.

[0007]

1 and 2, a swivel base 2 is mounted on an upper part of a crawler 1 which can be moved forward and backward, an engine compartment 3 and a cab 4 are mounted on the swivel base 2, and a boom 5 is mounted so as to be erected up and down. It consists of a self-propelled vehicle for civil engineering. Reference numeral 6 in the figure is a hydraulic cylinder for raising and lowering the boom. A central portion of the slide arm support member 11 in the longitudinal direction is attached to the tip of the boom 5 via a horizontal pin 9. A little above the pin 9 of the slide arm support member 11, a rod tip of a hydraulic cylinder 7 whose base is axially fixed to the boom 5 is connected via a pin 8, and the slide arm support member 11 is When the hydraulic cylinder 7 is expanded and contracted, the pin 9 is rotated (raised) around the pin 9.

A slide arm 10 is slidably mounted on the upper surface of the slide arm support member 11. The slide arm 10 has a T-shaped cross section, and both sides of the slide arm 10 are fitted into arm receivers 12 and 13 having a “-shaped cross section” fixed to the slide arm support member 11. The base of a hydraulic cylinder 14 as a drive device for sliding the slide arm 10 is fixed to the upper end of the rod, and the tip of the rod is connected to the slide arm 10. Therefore, the slide arm 10 has a hydraulic cylinder 14 The slide arm supporting member 11 slides in the longitudinal direction in accordance with the above operation.

At the tip of the slide arm 10, a rear upper portion of the frame 22 (on the side of the self-propelled vehicle) is attached via a horizontal pin 19. On the other hand, the base of the hydraulic cylinder 15 is fixed above the center of the slide arm 10. The rod tip of the hydraulic cylinder 15 has a pin 16 at the other end of a link rod 18 whose one end is rotatably mounted via a pin 17 slightly closer to the base than the tip of the slide arm 10.
It is rotatably attached via. And the pin 16
The other end of the link rod 21 is rotatably attached to the frame, and the other end of the link rod 21 is rotatably attached to the upper front portion of the frame 22 via a pin 20. The slide arm 10, the link rods 18, 21 and the frame 22
A link is constituted by the above, and the frame 22 is rotated by the operation of the hydraulic cylinder 15. Therefore, regardless of the inclination angle of the slide arm 10, the joint cutting plate 30 described later is used.
Also, the concrete vibrator 28 can be held vertically. When the joint is cut, the slide arms 10 are moved to the vertical state by the operation of the hydraulic cylinders 6 and 7, and the joint cutting plate 30 is also brought to the vertical state by the operation of the link, so that the joint plate 30 is perpendicular to the joint cutting plate 30. The pushing force in the direction works.

As shown in FIGS. 3 to 5, the frame 22 is mounted on the slide arm 1 via the pins 17 and 20.
0, an upper frame 23 connected to the link rod 21, and a lower frame 2 attached below the upper frame 23.
It is composed of 4 and. The upper frame 23 is constructed by vertically attaching side plates 23a to both upper sides of a bottom plate 23b. A rotary actuator 32 is installed on the bottom plate 23b. Further, a vertical gauge 33 is installed near the rotary actuator 32 of the upper frame 23. The output shaft 32a of the rotary actuator 32 protrudes downward through the through hole of the bottom plate 23b, and the upper plate 24b of the lower frame 24 is fixed to the end of the output shaft 32a. The frame 24 is adapted to rotate horizontally.

The lower frame 24 is constructed by vertically fixing side plates 24a on both lower sides of an upper plate 24b. The upper plate 24b is smaller than the bottom plate 23b of the upper frame 23, and the front edge of the holding member 25 described later and the front edge of the upper plate 23b are aligned with each other. The rear surface of the horizontally arranged holding member 25 is fixed to the front edge of the side plate 24a of the lower frame 24. The holding member 25 is in the shape of a rectangular tube, and both ends of the holding member 25 largely project from the lower frame 24. A plurality of joint cutting plate mounting seats 25a are provided on the front surface of the holding member 25, and the joint cutting plate 30 is mounted to the mounting seats 25a with bolts. Although the mounting seat 25a is located below the horizontal portion at the upper end of the joint plate in the figure, it can be provided symmetrically to the example in the figure so as to be located above. In the figure, 30a is a reinforcing plate of the joint cutting plate 30.

Support members 26 are fixed to both sides of the upper surface of the holding member 25. The support member 26 has a substantially trapezoidal tubular cross section with the front surface being vertical, and a vibrator mounting seat 27 is detachably mounted on the front surface with bolts.
The vibrator mounting seat 27 is composed of two plate members 27 facing each other.
It is composed of a. As shown in FIG. 5, a rubber 27b is attached as a vibration isolating member to the central portion of the plate 27a,
A metal cylinder 27d is attached to the vibrator mounting hole 27c.

A mounting shaft 28b horizontally projecting from both sides of a rod-shaped portion 28a formed at the base of the concrete vibrator 28 is rotatably fitted in a vibrator mounting hole 27c formed in the plate 27a of the mounting seat 27. I am disguised. The lower end of the rod-shaped portion 28a is covered with rubber 29 for vibration damping. The outer periphery of the rubber 29 is a semi-cylindrical rubber fixing fitting 2
Two 9a are arranged and fixed to each other with bolts 29c via the flanges 29b on both sides thereof, and one rubber fixing fitting 29a is welded to the holding member 25. The rubber 29 prevents the vibration of the vibrator 28 from being transmitted to the holding member 25 as much as possible.

The operation of the joint cutting machine shown in the above embodiment will be described. First, the hydraulic cylinder 6 is operated to operate the boom 5, and the hydraulic cylinder 7 is operated to operate the slide arm support member 11
Is rotated to align the tip of the joint cutting plate 30 with a desired joint cutting position, and the sliding surface of the slide arm 10 is held vertically by observing the vertical gauge 33. At this time, the hydraulic cylinder 15 is operated so that the joint cutting plate 30 is perpendicular to the concrete 31 surface. Next, while starting the concrete vibrator 28,
The hydraulic cylinder 14 is operated to push down the slide arm 10. When the slide arm 10 is pushed down, the concrete vibrator 28 and the joint cutting plate 30 attached to the tip of the slide arm 10 are also pushed down,
Inserted into concrete 31. At this time, the concrete near the joint cutting plate 30 is the concrete vibrator 2
Since it is fluidized by the vibration of No. 8, the joint cutting plate 30 sinks into the concrete with a relatively small pressing force. Joint plate 3
After immersing 0 to a predetermined depth, the operation of the concrete vibrator 28 is stopped, the hydraulic cylinder 14 is operated, and the slide arm 10 and the joint cutting plate 30 are pulled up to obtain joints.

According to this embodiment, since the upper frame 23 and the lower frame 24 are connected by the rotary actuator 32, the lower frame 24 can be automatically rotated by operating the rotary actuator 32. Further, since the vertical gauge 33 is attached, it is possible to surely cut the vertical joint.

As shown in FIG. 7, when the lower portion of the joint plate 34 is folded back upward and the folded portion is attached to the joint cutting plate 30 and the above operation is performed, the joint plate 34 is pushed into the concrete. In rare cases, when the joint cutting board is pulled out upward, the joint board 3
4 is left in the concrete.

Next, FIGS. 8 and 9 show another example of the mounting structure of the vibrator 28 and the joint cutting plate 30,
A frame 2 including an upper frame 23 and a lower frame 24 with pins 19 and 20 at the tip of the slide arm 10.
2 is attached and the vibrator 28 and the joint cutting plate 30 are attached to the frame 22 in the same manner as in the above embodiment.
Here, the upper frame 23 is constructed by vertically attaching side plates 23a to both upper sides of a bottom plate 23b, and a through hole 41 is provided in a central portion of the bottom plate. Reference numerals 42 and 4 in the figure
3 is a hole for inserting the pins 19 and 20, and 44 is a reinforcing plate.
The lower frame 24 is an inverted U-shaped plate, and has a through hole 45 at the center of the upper portion. A bolt 46 is inserted through the through holes 41 and 45 from the upper frame 23 side and is screwed into a nut 47. The head of the bolt 46 is supported by a stepped sleeve 48. Further, a spacer ring 49 is provided between the bottom plate 23b of the upper frame 23 and the lower frame 24, and a hollow having concentric cutout grooves on the upper and lower surfaces between the lower surface of the lower frame 24 and the nut 47. A ring-shaped sliding plate 50 and a ring-shaped receiving plate 51 are respectively interposed, and the bolt 46 is inserted through a through hole provided in the center of these plates. Further, a cutout groove is formed on one side of the nut 47, and a pin 52 is inserted from that portion toward a hole diametrically formed in the lower portion of the bolt 46. Reference numeral 53 in the drawing is a fixed ring.

A holding member 2 is provided at the lower end of the lower frame 24.
The upper plate 25b of No. 5 is fixed. The holding member 25 has a U-shaped cross section, and includes the upper plate 25b, a vertical front plate 25c fixed to the front edge, a lower plate 25d fixed to the lower edge and slightly protruding forward, and a side plate 25e. Configured.

The base of the joint cutting plate 30 is fastened by bolts to the projecting portion of the lower plate 25d of the holding member 25. Further, through holes 54 are provided on both sides of the lower plate 25d, and a base end of a pipe 55 is fixed to a lower portion of the through holes 54. A flange 55a is formed at the tip of the pipe 55, and a flange 28c formed at the base of the upper rod-shaped portion 28a of the vibrator 28 is fixed to the flange 55a with a bolt. In the figure, 29 is a built-in rubber for vibration isolation.

In this embodiment, in order to finely adjust the horizontal rotation of the joint cutting plate 30, the nut 47 is loosened, the lower frame 24 is rotated, and the nut 47 is fastened at an appropriate position.
Further, the nut 47 is not tightened, and a gap is left between the spacer ring 49 and the bottom plate 23b of the upper frame.
It is also possible to sandwich and fasten the end of the bottom plate 23b of the upper frame and the lower frame 24 with a manual vise. In this case, the bottom plate 23b and the lower frame 24 may be formed with extension portions for sandwiching, if necessary.

In these embodiments, a slide arm holding member 11 is rotatably attached to a boom 5 which can be raised and lowered, and a joint cutting plate 30 is attached to the tip of the slide arm holding member 11 via a frame 22 which is vertically and horizontally rotatable. Since it is attached, the joint cutting position can be selected without changing the position of the self-propelled vehicle, and work efficiency is high. Further, a well-known concrete compaction device can be attached to the tip of the boom 5 in place of the slide arm holding member 11, and the application of the self-propelled vehicle is not limited to joint cutting, which is economical.

[0022]

According to the present invention, since the joint cutting plate and the concrete vibrator are attached to the tip of the slide arm which is attached to the slide arm holding member so as to slide by the operation of the drive unit, the joint cutting machine is constructed. By operating the concrete vibrator, it is possible to push down the joint cutting plate into the concrete while fluidizing the concrete in the vicinity of the joint cutting plate. Therefore, the joint cutting plate can be smoothly inserted into the concrete and the joint can be cut without vibrating or hitting the joint cutting plate. Moreover, since concrete is fluidized by the concrete vibrator, it is possible to fluidize concrete with a small power, unlike the conventional one that vibrates the joint cutting plate itself. Therefore, the power required for joint cutting is smaller than that of the conventional one, and moreover, joints are cut at an accurate position, there is less noise, and there is no risk of damage to the device.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the present invention.

FIG. 2 is a side view in which a part of a state in which the slide arm support member is inclined is omitted.

FIG. 3 is likewise an enlarged side view of a main part.

FIG. 4 is an enlarged front view of the state of FIG.

FIG. 5 is an enlarged front view in which a part of the frame is also sectioned.

FIG. 6 is an enlarged perspective view showing a vibrator mounting structure of the same.

FIG. 7 is a partially enlarged side view of the same use example.

FIG. 8 is an enlarged front view of the essential parts of another embodiment of the present invention.

FIG. 9 is likewise an enlarged side view of a main part.

[Explanation of symbols]

5 boom 6 hydraulic cylinder 7 hydraulic cylinder 10 slide arm 11 Slide arm support member 12 arm receiver 13 Arm receiver 14 hydraulic cylinder 15 hydraulic cylinder 22 frames 23 Upper frame 24 Lower frame 25 Holding member 26 Support members 27 Vibrator mounting seat 28 Concrete vibrator 29 Anti-vibration rubber 30 joint plate 31 concrete 32 rotary actuator 33 Vertical gauge 46 volts 47 nuts 49 Spacer ring 50 sliding plate 55 pipes

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Sakuro Itsuro             2-2-2 Matsuzaki-cho, Abeno-ku, Osaka-shi, Osaka             No. Okumura Gumi Co., Ltd. (72) Inventor Norihide Ishibashi             2-2-2 Matsuzaki-cho, Abeno-ku, Osaka-shi, Osaka             No. Okumura Gumi Co., Ltd. (72) Inventor Yasutaka Watanabe             1-17-13 Hamamatsucho, Minato-ku, Tokyo Exen             Within the corporation (72) Inventor Takeo Minamibuchi             1-17-13 Hamamatsucho, Minato-ku, Tokyo Exen             Within the corporation

Claims (4)

[Claims] 1. A slide arm is slidably attached to an upright slide arm support member, a drive device for sliding the slide arm is attached, and a frame is attached to the tip of the slide arm. A joint cutting machine in which a base end of a joint cutting plate is attached to the frame and base ends of a plurality of concrete vibrators arranged along the joint cutting plate are attached. 2. The joint cutting machine according to claim 1, wherein the drive device is a hydraulic cylinder. 3. The frame comprises an upper frame rotatably attached to a slide arm in a vertical direction and a lower frame rotatably attached in a horizontal direction by an actuator attached to the upper frame. The joint cutting machine according to claim 1 or 2, wherein a concrete vibrator and a joint cutting plate are attached to the lower frame. 4. The jointing machine according to claim 1, wherein the slide arm support member is attached to a tip end of a boom of a self-propelled vehicle for civil engineering so as to be capable of undulating.