JPS6117096Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic opening/closing device for the grip of a lock drill.

In a drilling device in which a drilling machine is slidably attached to a leader and the drill is used to drill holes in hard ground or rocks, when the drilling machine is pulled up to its upper limit, the rod that supports the drill is grasped by some means, and the drill moves from side to side. I try to keep it directly in front of the reader without shaking it. This gripping device is called a centralizer, and the centralizer, that is, the gripping device, is manually hooked by the operator after the drilling operation is completed and the drilling machine is raised to the upper limit. The present invention aims to do this automatically. In order to achieve the above purpose, a rod and a link device are provided between the drilling machine and the centralizer,
The centralizer is closed only when the drilling machine is at its upper limit.

This will be explained in detail with reference to the drawings. 1 is a drilling machine,
It is attached to the front surface of the reader 3 via a slider 2 so as to be slidable up and down. 4 is the rod of drilling machine 1;
A drilling drill 5 is attached to the lower end, and
When drilling machine 1 is pulled up to the upper limit, rod 4
A gripping device 6 for gripping the lower part of the reader 3 is attached to the lower part of the leader 3. As shown in FIGS. 2 and 3, the gripping device 6 is a pair of left and right levers 7 that are slightly curved, the middle part of which is rotatably supported by a pin 8 that projects from the lower end of the leader 3, and the front end of which has a pair of left and right levers 7. A hollow semicircular receiver 9 is fixed so that the rod 4 can be gripped when the front parts of the left and right levers 7 are brought together, and a link mechanism is provided at the rear end to rotate the lever 7. 1
0 is installed. That is, the receivers 11 tied to the rear ends of the left and right levers 7 and the actuating piece 12 in the middle thereof.
A link 15 is rotatably connected by pins 13 and 14 between the two, and the lever 7 is rotated about the pin 8 when the operating piece 12 moves up and down. In addition, 16 is a tension spring, and lever 7
It is connected between the left and right levers 7 rearward from the pivot point with the pin 8, and the front part of the lever 7 can be opened easily. 17 is a rod for operating the lever 7, the lower end is connected to the operating piece 12, the upper end is bent in the shape of a key, and is attached to the slider 2 only when the punching machine 1 and the slider 2 are near the upper limit. The rod 17 is engaged with a hook 18 which is attached to the rod 18, so that the rod 17 is slightly pulled up, but the rod 17 is divided in the middle, and a cylinder 26 is fixed to one end, and the other end is fixed to a cylinder 26. The cylinder 26 is slidably inserted into the cylinder 26.
The rod 17 can be expanded and contracted to a certain degree via a compression spring 27 inserted therein. 19 is leader 3
20 is the arm, 21 is the boom, 22 is the hydraulic excavator body, 2
3 is a hydraulic cylinder, 24 is a rod, and 25 is a lever.

The present invention is constructed as described above, but to explain the actual operation, when the drilling machine 1 is not actually operated due to movement or other reasons, the drilling machine 1 is
The drill 5 at the lower end of the rod 4 is near the lower end of the leader 3. Therefore, the hook 13 of the slider 2 equipped with the drilling machine 1
is caught on the upper end of the rod 17, and the rod 17 is in a slightly lifted state. The lower end of the rod 17 is connected to the operating piece 12, and the lever 7 to which the receiver 11 is connected is connected to the lower end of the leader 3 via the pin 8 and does not move in the vertical direction. Receive money 1 via link 15 by
1, that is, the lever 7 is pushed left and right from the rear, so the front receiver 9 is in a state where it grips the rod 4. Since the lower part of the rod 4 is held in such a manner that it does not swing, there is no problem during movement.

Next, when placing the leader 3 at a desired position and operating the drilling machine 1 to perform drilling work, as the drill 5 drills into the object to be drilled, the drilling machine 1
gradually descends, and at the same time, the slider 2 and hook 18 also descend. Since the rod 17 was suspended by hooking its upper end with the hook 8, the lowering of the hook 18 also lowers the rod 17, but the rod 17 is separated in the middle so that it can expand and contract, and a compression spring 27 is interposed. When the rod 18 is pulled up by the hook 18, the spring 27 is compressed, so even if the hook 18 falls slightly, the spring 27 absorbs the movement and the lower part of the rod 17 does not move. However, if the drill 5 penetrates into the object to be drilled by about 50 mm, the lower part of the rod 17 will also descend, pushing the operating piece 12 at the lower end downward, and moving the holder 11 of the lever 7 via the link 15. Pull it to the center. The lever 7 rotates around the pin 8, the front receiver 9 opens left and right, and the rod 4 is released from the gripping device 6 and can rotate freely to perform drilling work.

The upper end of the rod 17 is caught on the hook 18 and is pushed up slightly at its upper limit, so
When the hook 18 descends together with the slider 2, the spring 2
The lower part of the rod 17 is lowered with a margin for expansion and contraction of the lever 7, and the link device 6 is actuated to open the front part of the lever 7 to the left and right. The rod 17 is connected to the link device 6 and cannot be lowered beyond a certain limit, but the hook 18 is separated from the rod 17 and lowered regardless of the rod 17. Therefore, during the drilling operation, the drill 5 is biting into the object to be drilled, so the hook 1 is
8 is always at a distance from the upper end of the rod 17, and the rod 4 is released from the gripping device 6.

When the drilling work is completed and the drilling machine 1 is pulled up to the upper limit, the hook 18 hooks onto the rod 17 and then pulls it up.
and secure it so that it does not swing.

As described above, the present invention relates the gripping device that grips the rod of the drilling machine to the vertical movement of the drilling machine, and uses the hook provided on the slider to release the rod via the link device during drilling operations. When the work is completed and the drilling machine reaches its upper limit, the rod is automatically gripped by the gripping device, so there is no need to bother with manpower every time, unlike in the past, and work efficiency is improved.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the present invention, and FIGS. 2 and 3 are enlarged plan views of section A in FIG. 1, and FIG. 3 shows the case where the front part is opened. 4 is a side view of FIG. 2, FIG. 5 is a side view of FIG. 3, and FIG. 6 is an enlarged sectional view of section B in FIG. 1. 1...Drilling machine, 3...Leader, 4...Rod,
5...Drill, 6...Gripping device, 17...Rod, 18...Hook.

Claims (1)

[Scope of utility model registration request] In a centralizer provided at the bottom of the leader of a rock drill consisting of a leader and a drilling machine, rod, drill, etc. that move along the leader to regulate the movement of the rod, a link device connecting the centralizer to the rear thereof, and a side part of the leader. The rod is operated by a hook that moves together with the drilling machine through a rod provided in the shaft and connected to the link device, and when the drilling machine is at the upper limit, the rod is gripped by the hook and the rod of the drilling machine is gripped by the centralizer through the link device. An automatic opening/closing device for the centralizer, which consists of the following: