JPS641279B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drilling device for drilling a relatively large hole in a hume canal.

Drilling holes for connecting branch pipes in the side wall of humid pipes has traditionally been done using an electric drill equipped with a cylindrical bit with a cutting edge on the periphery of the tip, but the rotational force of the electric drill is Because it is relatively small, this method could only drill holes with a diameter of about 150 mm. For this reason, caliber 250-300
Drilling of holes of mm diameter was carried out by using a tool to expand the diameter of the pilot hole drilled with the above-mentioned electric drill, but with this drilling method, the periphery of the hole obtained was extremely uneven, and the branch pipe There was a problem in that a gap was created in the connecting part, and dirt, etc. entered the pipe through this part, flowed into the sewage treatment tank, etc., and reduced the contents. In addition, in the case of a reinforcing steel pipe, the above-mentioned drilling itself is extremely difficult.

The object of the present invention is to provide a drilling device that can easily drill a hole with a relatively large diameter in a humid pipe, and includes a rock drill and a rock drill that supports the rock drill so as to be movable back and forth. It is equipped with a guide cell and a drive device that moves the rock drill back and forth, and the tip of the guide cell has a part that fixes the guide cell by contacting the convex curved surface of the outer periphery of the humid pipe or the like at two or more points. The present invention is characterized by the provision of a fixture having a contact portion and a bit supporting means that comes into contact with the outer peripheral surface of the lock bit to prevent the lock bit from swinging during drilling. The embodiments shown in the drawings will be described below.

FIG. 1 is an external view showing one example of a punching device according to the present invention, and each of the figures following FIG. 2 is an enlarged view of the main parts. A boom 4 is provided on a truck 3 having a traveling device 2 of this drilling device 1 so as to be rotatable up and down. Since the upper part of the vehicle body including the cabin 3a and the boom pivot portion 3b of the truck 3 is provided so as to be pivotable in a horizontal plane with respect to the traveling device 2, the boom 4 can also be pivoted laterally. 5 is boom 4
This is a hydraulic cylinder that rotates the machine up and down.

An arm 7 is pivotally attached to the tip of the boom 4, and a rear end 7a projecting upward from the pivot point P and an upper middle portion of the boom 4 are connected by a hydraulic cylinder 8. By extending and contracting this hydraulic cylinder 8, the arm 7 can be freely rotated with respect to the boom 4.

A bracket 9 is pivotally attached to the tip of the arm 7, and a first link 10 is pivotally attached at a position in front of this pivot point Q. A second link 11 is pivotally connected R to the bracket 9 at a position farther from the pivot point Q, and these first links 10 and the second
The link 11 and the tip of the piston rod of the hydraulic cylinder 12 whose rear end is attached to the arm 7 are pivoted S to each other at one point. When the hydraulic cylinder 12 is expanded or contracted, the bracket 9 rotates about the pivot point Q in the direction of the arrow X.

The bracket 9 has an upper connecting plate 1 that projects laterally.
4 and a lower connecting plate 15 projecting downward,
The upper connecting plate 14 has a side connecting piece 17 of the support plate 16.
is pivotally mounted T, and an arm portion 19 of a support plate 16 is connected to the lower connecting plate 15 via a hydraulic cylinder 20. A guide cell 22 is fixed to the support plate 16 with bolts, and when the hydraulic cylinder 20 is expanded or contracted, the support plate 16 rotates together with the guide cell 22 in the direction of arrow Y.

The guide cell 22 is connected to the substrate 2 as shown in FIG.
4 and a pair of side plates 25, 25' having a U-shaped cross section, the groove is formed into a groove, and a feed air cylinder 26 is housed inside the groove. Inside the opening of the guide cell 22, there are projecting edges 2 of the side plates 25, 25'.
A stop plate 27 is disposed inside 5a, 25a', and a carriage 29 disposed outside the guide cell 22 is disposed on this stop plate 27.
are fixed with bolts 30. Between the outer surfaces of the overhanging edges 25a, 25a' and the carriage 29, there is a sliding plate 3 bolted to the carriage.
1 is interposed.

A guide cell 22 is provided at the upper end of the carriage 29.
A cylinder mounting piece 32 is provided to be inserted into the inside of the air cylinder, and the tip end of the piston rod of the air cylinder 26 whose lower end is fixed to the guide cell 22 is attached to this. Further, a rock drill 33 is attached to the outer surface of the carriage 29, and when the air cylinder 26 is expanded or contracted, the rock drill 33 is configured to move up and down along the guide cell. . That is, in this embodiment, the rock drill 3
3 The air cylinder 26 is used as a drive device for feeding.
Although a hydraulic cylinder or other suitable device may be used as the drive device. A movement stroke of the rock drill 33 of about 25 cm is sufficient, but it may be longer.

There is a shank rod 35 at the tip of the rock drill 33.
is fitted, and the sleeve 3 is attached to the threaded end portion 35a.
6 is screwed on. The tip of the sleeve 36 is
As shown in FIG. 6, it is screwed onto a cylindrical ring bit 39 having a cutting edge 37 on its periphery, and a center drill 40 is screwed onto its internal thread. As the lock bit for drilling, it is preferable to use a ring bit 39 as shown in the drawing.

A fixture 41 is provided at the lower end of the guide cell 22 . The fixture 41 includes a back plate 42, a side plate 43,
43', and the side plates 43, 4
A generally V-shaped notch 44 is provided at the lower end of 3'. The notches 44, 44' serve as abutting portions that come into contact with the convex curved surface of the outer circumference of the hume tube at two or more points to fix the guide cell to the hume tube. A grooved frame 45 is integrally provided above the notch 44 of the side plates 43, 43', and the guide plate 4 has a center hole 48 in the center of which the ring bit 39 is loosely fitted.
7 is inserted. A bolt 49 is integrally provided at the rear end of the guide plate 47.
9 is inserted into the back plate 42, nuts 50,5
It is fixed by 1. By loosening the nuts 50 and 51, the longitudinal position of the guide plate 47 can be adjusted. Reference numeral 52 denotes a set bolt that reaches inside the groove of the grooved frame 45 from the outside of the side plates 43, 43', and allows the guide plate 47 to be fixed from the side. Note that an upper guide plate 54 is also provided above the guide plate 47 and extends from the back plate to the center of the fixture 41, and the ring bit 39 is inserted into the semicircular notch provided in the upper guide plate 54. The ring bit 39 is configured to be fitted to ensure the positioning of the ring bit 39. The above information board 47
It is desirable to provide bit support means, such as the upper guide plate 54, which can support the ring bit 39 so that it does not swing during operation. As the bit supporting means, for example, as shown in FIG.
A guide roll 56 that contacts the outer circumference of the ring bit 39 and rotates around a vertical axis may be employed.

FIG. 8 is a cross-sectional view of the rock drill 39, with 60
is a hydraulic motor, 61 is a rotating shaft of the hydraulic motor 60,
62 is a drive gear spline-fitted to the rotating shaft 61, 63 is an idler gear, 64 is a chuck driver, 65 is a chuck, 66 is a valve, 67 is a piston, and 69 is a broach tube. In other words, this rock drill is equipped with a striking device operated by compressed air and a rotating device operated by a hydraulic motor. During operation, compressed air is discharged to the tip of the ring bit through the broach tube 69 and the shunt rod 35. be done. As the rock drill 33, it is preferable to use one with a small impact force and a large rotational force. For example, the striking force may be comparable to that of a conventional hand hammer, but the rotational force is preferably comparable to that of a large hydraulic drifter. To give an example, when the air dynamic pressure is 5Kg/ ^cm2, the striking force is 5.9Kg.
It was preferred that the number of blows be 2,700 times per minute, the maximum rotational force be 53 kg·m, and the rotational speed be approximately 90 rpm.

When using this perforation device 1, the fixture 41 is pressed against the outer circumferential surface of the hump tube 70 to fix it.
By operating the rock drill 33 and contracting the air cylinder 26 while applying rotation and impact force to the ring bit 39, the rock drill moves forward along the guide cell 22 and the ring bit 39 is pressed against the humid pipe. A large diameter hole corresponding to the outer diameter of the ring bit is bored in the side wall of the hume tube. Since a V-shaped notch is provided at the lower end of the fixture 41, the guide cell 22 can be properly fixed to the outer circumference of the hume tube, which has a convex curved surface. By rotating the boom 4, arm 7, bracket 9, support plate 16, etc., the guide cell 22 can be moved to a desired position and tilted to a desired angle. A hole can be drilled at the desired angle at the location. Its handling operation is extremely simple.

In the illustrated example, a known hydraulic excavator (for example, UHO4 manufactured by Hitachi Kenzai Co., Ltd.) is used as the guide cell support device.
-5), with the bucket belt removed, so it can be used alternately with the bucket belt, making it extremely convenient.

As explained above, the drilling device according to the present invention is easy to handle and is extremely superior in that it can successfully drill relatively large-diameter holes in humid pipes and the like. It is clear that this device can be used to pierce more than just the Hume's canal.

[Brief explanation of drawings]

FIG. 1 is an external view showing one example of a drilling device according to the present invention, FIGS. 2 and 3 are a side view and a front view of main parts, and FIG. 4 is a sectional view taken along line A-A in FIG. 5 is a view taken along arrow B in FIG. 2, FIG. 6 is a cross-sectional view of the ring bit, FIG. 7 is an explanatory view of another embodiment of the lock bit supporting device, and FIG. 8 is a cross-sectional view of the rock drill. 1...Drilling device, 3...Dolly, 4...Boom,
5, 8, 12, 20... Hydraulic cylinder, 7... Arm, 16... Support plate, 22... Guide cell, 2
6...Air cylinder, 33...Rock drill, 35...
...Shankrod, 39...Ring bit, 41
... Fixture, 47 ... Guide plate, 70 ... Huyum tube.

Claims (1)

[Scope of Claims] 1. A rock drill, a guide cell that supports the rock drill so as to be movable back and forth, and a drive device that moves the rock drill back and forth, the tip of the guide cell having: It is equipped with a contact part that contacts the convex curved surface on the outer periphery of the hump pipe or the like at two or more points to fix the guide cell, and a bit support means that contacts the outer peripheral surface of the lock bit and prevents the lock bit from swinging during drilling. A drilling device characterized by being provided with a fixing device. 2. The drilling device according to claim 1, wherein the locking bit mounted on the rock drill is a cylindrical ring bit having a cutting edge on the peripheral edge of the tip.