JPS6020659Y2 - hole wall drilling machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hole wall drilling machine for installing holes drilled into the ground for anchor bolts.

Anchor bolts are made by drilling a hole in the ground using a boring machine such as a boring machine, inserting the anchor bolt into the hole, and pouring mortar, cement milk, etc. to fix it and use it for attaching equipment.

If the ground is soft, the pullout strength can be increased by making the hole not just a cylindrical hole but a hole with a bulge in the middle.

The present invention aims to provide a hole wall expanding machine suitable for creating this bulge.

To explain the drawings, in Figure 1, 10 is the ground;
12 is a cylindrical hole drilled in the ground using a hole drilling machine.

The hole wall expanding machine 2o of the present invention is inserted into the hole 12 and rotated to form the bulge 14.

The expanding machine 20 includes a tube body 22, an operating rod 24, and a pantograph 26.
, a cutting soil storage can 28, etc.

A bundle 30 for rotating the tube is attached to one end of the tube 22, and one end 26a of the pantograph 26 is fixed to the other end.

The operating rod 24 extends through the tubular body 22, and has a threaded end 24a protruding from one end of the tubular body 22, into which a nut 34 with a bundle 32 is screwed.

The other end 24b protruding from the other end of the tube body 22 engages with the other end 26b of the pantograph 26 on the outside. Therefore, when the bundle 32 is operated to turn the nut 34 and the operating rod 24 is pulled up, the pantograph 26 is moved. Expand as shown.

A spring 36 is provided between one end 26a and the other end 26b of the pantograph 26 along the operating rod 24, and the bundle 32 is operated to rotate the nut 34 in the opposite direction to move the operating rod 24 to the dead smell. The pantograph 26 to be advanced is contracted by the spring 36 and becomes parallel to the operating rod 24.

The cutting soil storage can 28 is rotatably attached to a pair of support rods 38 and 40 fixed to the other end of the tubular body 22 in front of the pantograph.

The other end 26b of the pantograph 26 protrudes through the opposing gap between the pair of support rods, and one end of each pair of rotatable link parts of the pantograph is pivotally attached to the protrusion as shown.

A schematic perspective view of the pantograph section and the cut soil storage can is shown in FIG.

Returning to FIG. 1 again, 40 is a coupler for connecting the operating rod 24, 42 is a coupler for connecting the tube body 22, and 44 is a spacer for positioning the tube body 22 correctly in the center of the hole 12.

Further, 46 is a hole fixing fitting having a two-sided structure, having a flange portion and a short cylindrical portion, and 50 is a ring-shaped stopper 48 that loosely fits into the tube body 22 and is fixed to a predetermined position of the tube body 22. It is a screw that allows

Next, the operation of this drilling machine will be explained.

A hole 12 is drilled in the ground 10, and the expander 20 operates the bundle 32 to advance the rod 24 and keep the pantograph 26 in a contracted state.

In this state, the outer diameter of the expanding machine, including the tube body 22, pantograph 26, and housing can 28, is smaller than the inner diameter of the hole 22, so these portions are inserted into the hole 12.

The stopper 48, which is loosely fitted to the tube body 22, is pulled toward the bundle 30 during the above-mentioned insertion, and after insertion, the metal fitting 46 is fitted to the upper end of the hole 12 as shown in the figure, and the stopper 48 is placed thereon and the screw 50 is tightened. Fix it.

Since the outer diameter of the spacer 44 located directly above the pantograph 26 is smaller than the inner diameter of the hole, the metal fitting 46
At the same time, the drilling machine is properly positioned along the center line of the hole 12.

Next, operate the nozzle 32 to pull up the operating rod 24 and expand the pantograph 26 as shown.

This expansion pushes down the hole wall and makes it concave, creating the same shape as a pantograph.

Next, the tube body 22 is rotated using the nozzle 30.

The pantograph 26 has one end 26a fixed to the tube body 22,
Since the other end 26b is held between the pair of support rods 38, it rotates with the rotation of the tube body 22.

The bearings for this rotation are the metal fitting 46 and the spacer 44.

At this time, the operating rod 24 rotates together with the tube body 22.

The hole 12 is cut by the pantograph 26 as it rotates, and the periphery thereof becomes an abacus-shaped hole.

The cut soil falls and is stored in the can 28.

When the bulge is formed in this way, the bundle 32 is operated in the opposite direction, the operating rod 24 is advanced, the pantograph 26 is contracted by the spring 36, and the expanding machine is then pulled up from the hole 12 by holding the bundle 30 and the like. Complete the widening work.

As is clear from the above description, the bulge can be easily formed in the cylindrical hole 12 using the visitor-type enlarging machine.

The cutting soil generated by the drilling is stored in the can 28 at the lower end, so when the drilling machine is taken out from the hole, it is taken out together with the cutting soil.
There is no such thing as filling the bottom of the.

Furthermore, if the structure is such that the tube body 22 and the operating rod 24 are connected by the couplers 40 and 42 as shown in the embodiment, the overall length of the drilling machine can be changed to match the required length of the hole 12 by adding or replacing it. It is also possible to create a widening machine with multiple locations.

In addition, by providing the metal fitting 46 and the spacer 44, not only can the drilling machine be set correctly in the center of the hole 12, but it can also be used as a bearing during rotation, making the drilling work easier, and the bulging part can be placed in the hole. You can center it on 12 and drill it correctly.

Furthermore, by using a screw and nut mechanism to move the operating rod 24 forward and backward, the pantograph can be easily expanded, which requires a large force when the ground is hard.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a state in which the drilling machine according to the present invention is installed in the ground, and a portion thereof is shown in cross section or broken. FIG. 2 is a schematic perspective view of a portion of FIG. 1. In the drawing, 22 is a tube body, 30 is a bundle, 26 is a pantograph, 24 is an operating rod, 22a, 34, 32 are advance/retreat mechanisms, 3
6 is a support rod, and 28 is a cut soil storage can.

Claims (1)

[Claims for Utility Model Registration] A bundle for rotating the tube is attached to one end of the tube, and one end of a pantograph for enlarging the hole wall is attached to the other end of the tube, and the bundle is operated through the inside of the tube. A rod is passed through the operating rod, and a mechanism for advancing and retracting the operating rod is attached to one end of the operating rod, and the other end of the pantograph is attached to the other end, so that the pantograph is expanded and contracted by moving the operating rod back and forth. , A can for storing soil cut by a pantograph is attached to the other end of the tube via a support rod and located further forward of the other end of the operating rod. Machine.