JPH078629Y2 - Rod edging device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention separates two rods that are screwed together after using a device or member that is used by screwing a plurality of rods like a double pipe drill rod. The present invention relates to an edge cutting device for a rod used for performing the cutting.

[0002]

2. Description of the Related Art In an excavator equipped with a double pipe type drill rod, the rods are replenished one after another as the excavation distance is extended. After the excavation is complete, add one additional rod.
Separate one book. In a double-tube drill rod of the type in which two rods are added together by screwing them together, an edging device equipped with a wrench of a prescribed shape is used to separate the added rods one by one. . As an edge cutting device for such an application, a device having a structure shown in FIGS. 6 and 7 is known.

The edging device 20 shown in FIGS. 6 and 7 is provided with a hydraulic cylinder 23 lying in the inner space of a bottom cover 22 having a stopper 21 on the upper back surface, and one end of a fixed portion (cylinder) of the hydraulic cylinder 23. 23a is rotatably supported. On the other hand, one end 23b of the plunger of the hydraulic cylinder 23 is rotatably connected to one end of a vertical arm 24, and a wrench 25 is rotatably attached to the other end of the vertical arm 24 by a pin 26. Besides, a pad 27 for slip prevention is provided. Further, on the back surface of the wrench 25, there is provided an operating lever 28 which is gripped when the wrench 25 is manually engaged with the rod to be separated. Furthermore, two pads 29a and 29b for preventing slippage are provided on the surface of the wrench 25 that engages with the rod.

The separation (edge cutting) of the rod using the edge cutting device 20 is performed as follows. First,
The gripper 30 shown in FIGS. 6 and 7 fixes the rod immediately before the rod to be separated (on the drill head side). Next, the wrench 25 locked by the stopper 21 is manually pulled up to a predetermined height by manually grasping the operating lever 28. Then, while maintaining the wrench 25 at a predetermined height, it is moved to the rod side, and the wrench 25
Two pads 29a, 29b for preventing slippage provided on the
Engage the rod. At this time, the non-slip pad 27 provided on the vertical arm 24 also engages with the rod.
After this, one end 23 of the plunger of the hydraulic cylinder 23
By extending b in the arrow A direction, the wrench 25 is rotated in the arrow B direction. Since the rod also rotates in the direction of arrow B as the wrench 25 rotates in the direction of arrow B, a desired edge cutting is performed.

To remove the wrench 25 from the rod after cutting the edge, one end 23b of the plunger of the hydraulic cylinder 23 is removed.
Is slightly retracted to the one end 23a side of the fixed portion. Pad 2
Since the arrangement position of 7 is slightly displaced to the lever 28 side from the extension of the line extending in the diameter direction of the rod from the center of the pad 29a, the one end 23b of the plunger is slightly retracted, so that the pad 27, The engagement between the rods 29a and 29b and the rod is loosened, and after the engagement is loosened, the wrench 25 rotates in the direction opposite to the arrow B by its own weight, and the wrench 25 is disengaged from the rod.

[0006]

However, in the above-mentioned conventional edging device, the load applied to the human body when pulling up the wrench is as heavy as several tens kg (for example, 30 kg). Therefore, the wrench is pulled up to a predetermined height and the rod is pulled up. However, there is a drawback in that a lot of labor is required to engage with.
In addition, when used in a place where the foothold is relatively unfavorable, such as in an excavation site, an accident is likely to occur due to the inability to support a heavy wrench, and there is a drawback that the risk increases.

An object of the present invention is to provide an edging device which can be operated with less labor and which is highly safe even when used in a place where the scaffolding is poor.

[0008]

The edging device of the present invention which achieves the above object is provided with a drive mechanism for rotating a wrench provided with an operating lever by a link mechanism and for rotating the wrench. In the rod edging device, the end of the shaft connecting the wrench and the link mechanism is supported by a concave guide, and the guide extends to a position where the rod and the wrench with which the edging is engaged engage with each other. It is a feature.

[0009]

Operation: When using the edge cutting device of the present invention,
First, grasp the operating lever provided on the wrench with your hand, and make the end of the shaft pivotally attaching the link mechanism and the wrench slide on the concave curved surface of the guide to set the operating lever to the predetermined position. Up to the height of. Then, as in the conventional case, the wrench is rotated to the rod side while maintaining the predetermined height, and the wrench and the rod are engaged with each other. After that, the driving mechanism is driven to rotate the wrench in a predetermined direction to cut the edge of the rod.

The guide in the edging device of the present invention extends to the position where the wrench and rod engage. Therefore, the wrench can be pulled up to a predetermined height as the end of the shaft slides on the concave curved surface, and at this time, the weight of the wrench and the link mechanism is supported by both the human body and the guide. , The work of pulling up the wrench is reduced. Therefore, the edging device of the present invention can be operated with less labor than the conventional edging device. Further, since the labor for pulling up the wrench is reduced, the danger during use is reduced and the safety is enhanced.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the edging device of the present invention will be described below with reference to the drawings. 1 is a plan view of the embodiment, FIG. 2 is a partially sectional front view, FIG. 3 is a sectional view taken along the line AA shown in FIG. 1, and FIG. 4 is a line taken along the line AA when a wrench is engaged with a rod. FIG. 5 is a cross-sectional view and FIG. 5 is an explanatory view showing a usage example of the embodiment.

The edging device 1 shown in FIGS. 1 to 4 is equipped with a hydraulic cylinder 4 as a drive mechanism in an internal space of a bottom cover 3 having a stopper 2 on the upper back surface. The hydraulic cylinder 4 is lying in the inner space of the bottom cover 3, and one end 4a of the cylinder portion of the hydraulic cylinder 4 is rotatably supported (see FIGS. 3 and 4). On the other hand, one end 4 of the plunger of the hydraulic cylinder 4
b (see FIGS. 2, 3 and 4) is rotatably connected to one end of a vertical arm 5 which is a link mechanism. At the other end of the vertical arm 5, a wrench 6 is rotated by a pin 7. In addition to being freely pivotally mounted, a non-slip pad 8 is provided. On the back surface of the wrench 6, there is provided an operating lever 10 which is gripped when the wrench 6 is manually engaged with the rod 9 to be separated. Also, a pad 11 for preventing slippage is provided on the surface of the wrench 6 on the side that engages with the rod 9.
a and 11b are provided.

The end portion of the pin 7 rotatably pivotally mounting the vertical arm 5 and the wrench 6 is supported by the concave curved surface 13 of the guides 12a and 12b received on the inner peripheral surface of the side wall of the bottom cover 3. Has been. The guides 12a and 12b are provided so that the concave curved surface 13 circumscribes the pin 7 at a position where the rod 9 and the wrench 6 to be separated are engaged with each other. The end of the pin 7 is slidably locked on the concave curved surface 13.

When performing edging of, for example, a double pipe type drill rod using the edging device 1 constructed as described above, first, the gripping machine 15 arranged in parallel with the edging device 1 is used.
Thus, the rod immediately before the rod 9 to be separated (drill head side) is fixed. Next, the operating lever 10 provided on the wrench 6 is gripped by hand, and the operating lever 10 is pulled up so that the end of the pin 7 slides on the concave curved surface 13 of the guides 12a and 12b. Is moved to a predetermined height. Then, while maintaining the wrench 6 at a predetermined height, the wrench 6 is rotated toward the rod 9 to
The non-slip pads 11a and 11b provided on the above are engaged with the rod 9 (see FIG. 4). At this time, the non-slip pad 8 provided on the vertical arm 5 also engages with the rod 9. After that, by driving the plunger of the hydraulic cylinder 4 in the direction of arrow a (see FIG. 4), the end portion of the pin 7 slides on the concave curved surface 13 of the guides 12a and 12b in the direction of arrow b, which causes the wrench to move. 6 in the direction of arrow b 70
Rotate about a degree. As the wrench 6 rotates about 70 ° in the direction of arrow b, the rod 9 also rotates about 70 ° in the direction of arrow b, so that a desired edge cutting is performed.

After cutting the edge, the plunger of the hydraulic cylinder 4 is slightly pulled into the cylinder, and the wrench 6 is removed from the rod 9. When the plunger is slightly retracted, the position of the pad 8 is slightly displaced to the lever 10 side from the extension of the line extending from the center of the pad 11a in the diameter direction of the rod 9, so that the pads 8, 11a, 11
The engagement between b and the rod 9 is loosened. After the engagement is loosened, the wrench 6 rotates in the direction opposite to the arrow b due to its own weight, so that the wrench 6 is disengaged from the rod 9.

FIG. 5 shows an outline of a state of use when the edging device 1 used in this way is used for edging a double pipe type drill rod. As shown in FIG. 5, the edge cutting device 1
Is mounted on the excavator 16 together with the gripper 15 for use. In FIG. 5, 17 is a double pipe type drill rod,
Reference numeral 18 is a swivel head, and 19 is a drill head.

In the edging device 1 described above, since the pin 7 is slidably supported by the concave curved surface 13 of the guides 12a and 12b, when the wrench 6 is pulled up to a predetermined height by human power, the wrench 6 and the vertical Since the weight of the arm 5 and the like can be dispersed and supported by both the human body and the guides 12a and 12b, the labor for pulling up the operating lever 10 is less than in the conventional case. Therefore, the edging device 1 can be operated with less labor than the conventional edging device, and is highly safe in use.

The edging device of the present invention is not limited to the embodiment and includes various modifications and applications. For example, in the embodiment, the guides 12a, 12
Although b is provided on the inner peripheral surface of the side wall of the bottom cover 3, it may be provided as a member independent of the bottom cover 3. The shaft that pivotally attaches the vertical arm 5 and the wrench 6 that are the link mechanism is the pin 7 in the embodiment, but the shaft is not limited to the pin. For example, a support shaft having rollers or wheels at its ends may be used. The drive mechanism is not limited to the hydraulic cylinder, and can be changed as appropriate. Further, the link mechanism is not limited to the vertical arm, and can be changed as appropriate. The edging device of the present invention can be used not only for edging a double pipe type drill rod but also for edging of various screwed rods and pipes.

[0019]

As described above, in the edging device of the present invention, since the end of the shaft for pivotally attaching the link mechanism and the wrench is supported by the predetermined guide, the weight of the wrench, vertical arm, etc. It is possible to raise the wrench to a predetermined height while supporting it with both the human body and the guide. For this reason, it can be operated with less effort than before, and is highly safe in use.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment.

FIG. 2 is a partial cross-sectional front view of the embodiment.

3 is a cross-sectional view taken along the line AA shown in FIG.

FIG. 4 is a cross-sectional view taken along the line AA showing a state when the rod is engaged in the embodiment.

FIG. 5 is an explanatory diagram showing a usage example of the embodiment.

FIG. 6 is a vertical cross-sectional view showing a state of the conventional edging device before rod engagement.

FIG. 7 is a vertical cross-sectional view showing a state of a conventional edge cutting device when a rod is engaged.

[Explanation of symbols]

 1 Edge Cutting Device 4 Hydraulic Cylinder 5 Vertical Arm 6 Wrench 7 Pin 10 Operating Lever 12a Guide 12b Guide 13 Concave Curved Surface

Claims (1)

[Scope of utility model registration request] 1. A rod edging device provided with a drive mechanism for rotating a wrench having an operating lever by means of a link mechanism and connecting the wrench and the link mechanism. A rod edging device, characterized in that the end of the shaft is supported by a concavely curved guide, and further the guide extends to a position where the rod with which the edging is made engages with the wrench.