JPH05263579A - Excavating rod clamp mechanism - Google Patents

Abstract

PURPOSE:To clamp a rod aligned with a drilling center by holding the excavating rod, with a clamp piece to be advanced with a cylinder and a clamp piece to be advanced with a clamp arm. CONSTITUTION:At the tip of a cylinder tube 5, a clamp piece is set, and by a cylinder 1, the clamp piece and a cam 4 are integrally moved forward or backward. In its case, together with the clamp piece, the cam 4 is advanced, and the rollers 11, 12 of clamp arms 6, 7 are attracted with a spring 13 and are pressed to be brought in contact with the guide surface of the cam 4. After that, the clamp arms 6, 7 are rotationally moved with the centers of respective pins 8, to be confronted with each other, and by clamp pieces 9, 10, an excavating rod R is pressed. Then, with the clamp piece advanced by the cylinder 1 and the clamp pieces 9, 10 advanced with the rotational movement of the clamp arm 6, 7, the rod R is held from the three directions and is clamped. As a result, at the added position of a hole excavating device, the rod R is clamped and can be easily jointed to, with safety.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention supplies a drilling rod with a drilling rod, for example, an outer pipe drilling rod and an inner pipe drilling rod for a double pipe method (hereinafter referred to as a double pipe rod). The present invention relates to an excavating rod clamp mechanism that clamps a heavy pipe rod to a double pipe rod on the side of a drilling device.

[0002]

2. Description of the Related Art A drilling device uses a double pipe rod to drill holes to a predetermined depth while sequentially adding the rods. Conventionally, when a double pipe rod is successively added to this drilling device for drilling work, the outer pipe of the connected double pipe rod is fixed by a hydraulic clamp using a hydraulic cylinder, For the inner pipe, a wrench was inserted into a wrench flat portion provided on the outer periphery of the pipe to hold the end face of the connected screw portion of the outer pipe and the spanner.

[0003]

However, when the worker inserts and removes the inner pipe excavating rod by using the spanner, the spanner itself bears the weight of the excavating rod, and at the time of the rod replenishing work, the connecting screw is used. Because of the make-up of the machine, it receives a large rotating force by the machine, and when removing the connecting screw, it receives a large reverse rotating force by the machine for disconnecting the connecting screw, so it is very difficult to do it by hand, such as inserting your hand between the spanner holder. It was a dangerous task. Further, the method of fixing the inner pipe excavating rod using a spanner is difficult to hold at the center of rotation of the machine, which is inconvenient for screw connection work performed by the machine. The present invention has been made in view of the above circumstances, and an object thereof is to provide a drilling rod clamp mechanism capable of remotely clamping a drilling rod of a drilling device by aligning it with a drilling center. To do.

[0004]

In order to achieve the above object, the present invention is an excavating rod clamp device for gripping a rod to be added to a drilling device, the clamp being provided at the tip of a cylinder tube of a cylinder. A piece, a cam connected to the cylinder tube of the cylinder, and a pin provided on the frame, which rotate in opposition to each other, and a roller that follows the cam is provided at one end and a clamp piece at the other end. And two springs that index the clamp arms and constantly press the roller against the guide surface of the cam. The clamp piece of the clamp arm may be detachable, and the cam may have a guide surface having a divergent inclined surface and a vertical surface following the inclined surface.

[0005]

The operation of the clamp piece provided at the tip of the cylinder tube of the cylinder advances and retracts by the cylinder. Each of the two clamp arms can rotate about the pin while facing each other. The cam connected to the cylinder tube of the cylinder moves back and forth together with the clamp piece by the cylinder.

Since the roller provided at one end of the clamp arm is indexed by the spring and constantly pressed against the guide surface of the cam, the roller follows along the guide surface of the cam, and thereby the other end of the clamp arm. The clamp piece provided at the position also operates following the movement of the cam.

That is, when the clamp piece provided at the tip of the cylinder tube is advanced by the cylinder, the cam is also advanced together with it, so that the roller provided at one end of the clamp arm is pressed against the guide surface of the cam, so that The cam piece that has advanced moves to face each other, and the clamp piece provided at the other end grips the excavation rod. Therefore, the excavating rod is grasped and clamped from three directions by the clamp piece at the tip of the advanced cylinder tube and the clamp piece of the rotated clamp arm.

[0008]

The present invention will be described in detail below with reference to the illustrated embodiments. FIG. 1 is a plan view showing an embodiment of the present invention.
In the figure, reference numeral 1 denotes a cylinder provided on a mounting plate 2, and a cylinder tube 5 thereof has a clamp piece 3
And cams 4 and 4 are provided. Therefore, the clamp piece 3 and the cam 4 are integrally advanced and retracted by the cylinder 1.
The clamp piece 3 is provided at the tip of the cylinder tube 5, and the cams 4 and 4 are provided symmetrically via a cam bracket. The guide surfaces of the cams 4, 4 are inclined surfaces 4
a and a vertical surface 4b, the inclined surface 4a is symmetrically formed with the cams 4 and 4 in a divergent shape, and the vertical surface 4b is provided at a symmetrical position.

Reference numerals 6 and 7 denote clamp arms, which are pins 8
Are pivotally attached to each other, and rotate about the pin 8 as opposed to each other. Clamp pieces 9 and 10 are provided on the surfaces of the clamp arms 6 and 7 that face the tips. The clamp pieces 9 and 10 hold the rod R from three directions with the clamp piece 3 provided at the tip of the cylinder tube 5. Therefore, the clamp pieces 9 and 10 may be fixed to the clamp arm, but it is more preferable that the clamp pieces 9 and 10 be detachably attached because they can be replaced by the diameter of the rod R.

Further, rollers 11 and 12 that follow the cams 4 and 4 are rotatably attached to the other ends of the clamp arms 6 and 7, respectively. The rollers 11 and 12 are provided with a spring 13 stretched between the ends of the clamp arms 6 and 7.
Are indexed by and are constantly pressed against the guide surfaces of the cams 4, 4. Therefore, the rollers 11, 12 are always in the cam 4,
You will follow 4 and be driven. The spring 13
Are stored in the case 14 in this example.

Then, the three clamp pieces 3, 6,
When the rod R is positioned substantially in the center of 7 and the clamp piece 3 is advanced by the cylinder 1, the cams 4, 4 also advance together with the advance of the clamp piece 3. Then, the rollers 11 and 12 of the clamp arms 6 and 7 are indexed by the spring 13 and are constantly pressed against the guide surfaces of the cams 4 and 4, so that they are pushed by the guide surfaces when the cam advances, so that the clamp arm 6 is pressed. , 7 rotate opposite to each other around the respective pins 8 and 8, and the clamp pieces 9 and 10 at the tips press the rod R. Accordingly, the rod R is grasped and clamped from three directions by the clamp piece 3 advanced by the cylinder 1 and the clamp pieces 9, 10 advanced by the rotation of the clamp arms 6, 7.

At this time, since the inclined surfaces 4a and the vertical surfaces 4b are symmetrically formed on the guide surfaces of the cams 4, 4, the clamp pieces 9, 10 of the clamp arms 6, 7 are mechanically rotated by the rod R. At the time of gripping at the center position, the rollers 11 and 12 ride on the vertical surfaces 4b and 4b from the inclined surfaces 4a and 4a of the cams 4 and 4, and the clamp piece 3 at the tip of the cylinder tube 5 firmly presses the excavating rod R and grips it. Therefore, even if the cylinder tube 5 extends, the positions of the clamp arms 6 and 7 do not change, and the excavating rod R is always held at the center of rotation of the machine.

Although the cams 4 and 4 are preferable examples,
At least a symmetrical and divergent inclined surface is formed, and if the vehicle has a riding portion that changes in a continuous manner from the inclined surface to a vertical surface, that is, a snack-overed portion, the function can be achieved, so it is not necessarily limited to the above embodiment. Not something.

Further, FIG. 1 shows a state in which the rod R is gripped, but in use, when the cams 4 and 4 are retracted by the cylinder 1, the clamp arms 6 and 7 are fixed by springs 13.
Since one end of the arm is indexed, it pivots in the opposite direction to when it is gripped and the arms 6 and 7 open, so it is natural to position and clamp the rod R in that state.

In the above embodiment, the clamp of the rod R is explained, but in the case of the double pipe rod of the outer pipe excavating rod and the inner pipe excavating rod, the clamping mechanism is arranged in parallel and the outer rod and the inner rod are arranged. It may be grasped and clamped. Further, the present invention may be applied to a hole drilling device or a rod handling device that supplies a double pipe rod to the hole drilling device, and is applicable in a wide range when rod clamping is required. It is possible.

[0016]

As described above, according to the present invention, a drilling rod, for example, a double pipe rod can be clamped at a position to be added to a drilling device, and when applied to a rod handling device, it can be mounted on a clamping mechanism. It is possible to set by aligning the cores up to the connecting position by simply clamping the double pipe rod to be added. Therefore, it is possible for the operator to save the trouble of getting out of the vehicle and setting the double pipe rod each time to add a joint,
Even a heavy double tube rod can be easily connected and is safe.

[Brief description of drawings]

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

[Explanation of symbols]

 1 Cylinder 3 Clamp Piece 4 Cam 4a Sloping Surface 4b Vertical Surface 6,7 Clamp Arm 9,10 Clamp Piece 11,12 Roller 13 Spring

Claims (3)

[Claims] 1. A drilling rod clamp device for gripping a rod added to a drilling device, comprising a clamp piece located at a tip of a cylinder tube of a cylinder, and a cam connected to the cylinder tube of the cylinder. Two clamp arms, each of which rotates about a pin provided on the frame and opposes each other, has a roller that follows the cam at one end and a clamp piece at the other end, and a roller that indexes the clamp arm. A drilling rod clamp mechanism including a spring that constantly presses against the guide surface of the cam. 2. The excavating rod clamp mechanism according to claim 1, wherein the clamp piece of the clamp arm is detachable. 3. The excavating rod clamp mechanism according to claim 1, wherein the guide surface of the cam comprises a divergent inclined surface and a vertical surface following the inclined surface.