JPH0560031B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a rod changing device for a crawler drill used for drilling work and the like.

BACKGROUND OF THE INVENTION In a crawler drill that uses a drilling device mounted on a vehicle to drill into the ground, rods must be added sequentially as the drilling progresses. For this purpose, a rod changing device is provided.

Problems to be Solved by the Invention Conventional devices require power to carry the rods to the exchange position and a power system to move the rods in the rod exchanger to the loading/unloading entrance. The mechanism becomes complicated, as it requires a device to open and close the gate at the loading/unloading entrance.
The drawback was that the weight of the device was heavy and the cost was high.

Means for Solving the Problems (a) A single hydraulic cylinder is used to move the rod into and out of the rod changing device to the changing position.

(b) The action of gripping the sleeve is performed by a lock cylinder.

Function: By gripping the sleeve 10 between the clamp 15 and the lock cylinder 24, threads can be easily connected to the rod.

Embodiment In FIGS. 1 to 8, 1 is a guide cell support mounted on a vehicle in an up-and-down manner, and 2 is a guide cell support 1 according to the distance between the drilling point and the vehicle body.
A guide cell is slidably mounted above the rod, a drifter 3 moves back and forth on the guide cell 2 and applies impact and rotation to the rod, and a centrifuge 4 is attached to the tip of the guide cell 2 to support and guide the rod. 5 is a rod exchange device.

7 is a chain for moving the drifter 3 forward and backward;
8 is a sprocket, 9 is a rod, and 10 is a sleeve.

The rod changing device 5 consists of a magazine device 11 and an indexing device 12.

The magazine device 11 consists of the following members: 13 is a swing arm, 14 is a shaft, 15
17 is a magazine plate fixed to the end surface of the clamp 15; 18 is the indexing device 1;
This is the shaft that connects with 2. Furthermore, shaft 1
4 and 18 have tapered shaft portions, and the shaft 14 is fixed to the swing arm 13 by tightening a nut 20 via a spacer 19, and the shaft 18 is used for phasing between the magazine plate 17 and the indexing device 12. After doing this, spacer 2
The magazine plate 17 is fixed by tightening the bolt 22 through the bolt 1.

23 is a roller attached to the magazine plate 17, and 24 is a lock cylinder. Clamp 15
The magazine plate 17 has a plurality of recesses 15a arranged at equal intervals on the same circle for gripping the sleeve 10A between the magazine plate 17 and the lock cylinder 24.
It has a plurality of recesses 17a for accommodating A at equal intervals on the same circle. 31 is a bracket that is attached to the guide cell 2 with a bolt, 32 is a bracket that is attached to the bracket 31 at one end, and a pin 3 that is attached to the swing arm 13 at the other end.
This is a hydraulic cylinder that is rotatably attached via 3 and 34. A stopper 35 prevents the rod 9 and sleeve 10 from falling when the guide cell 2 is oriented upward. Swing arm 13 is fixed to shaft 36. 37 is magazine device 1
1 and the indexing device 12.

The indexing device 12 consists of the following members: 41 is a swing arm, which is attached to the shaft 18 via a spherical bearing 42. 43 is a plate fixed to the shaft 18, and 44 is a roller attached to the plate 43. The plate 43 has a plurality of recesses 43a for accommodating the rods 9 on the same circle at equal intervals. Recess 4 of plate 43
3a and the roller 44 have the same shape as the recess 17a of the magazine plate 17 and the roller 23.
Reference numeral 45 denotes a cam device, the detailed structure of which is omitted, but it rotates the magazine plate 17 and the plate 43 by one pitch when adding and recovering rods to accurately position each phase.

The swing arm 41 is fixedly attached to the shaft 36, and the shaft 36 has spherical bearings 55, 56.
It is rotatably attached to the brackets 31, 54 via. Note that the spherical bearings 55, 56, and 42 have the same structure as the spherical bearing 16.

Adding rods is done as follows: (When adding a new rod 9A to a rod 9 that has already been propelled underground) 1. When the rod 9 that is being propelled has reached a predetermined position, move the drifter 3 to the guide cell 2. retreat along the line.

2. Extend the hydraulic cylinder 32 of the rod exchange part 5 and tilt the swing arms 13, 41 forward.

3 Extend the lock cylinder 24 and
The sleeve 10A screwed into the sleeve 10A is held by the lock cylinder 24 and the clamp 15. (Figure 5)
At this time, the rod 9A to be added is aligned with the center line of the hole.

4 Move the drifter 3 forward and screw it into the sleeve 10A while rotating to connect it.

5. After retracting the lock cylinder 24 to release the lock, retract the hydraulic cylinder 32 and return the swing arms 13, 41 to their original positions. At this time, sleeve 10A (and rod 9A)
exits through the loading/unloading port 13a of the swing arm 13 and the loading/unloading port 41a of the swing arm 41. The sleeve 10A is fixed by the drifter 3, and the other end of the rod is supported by a rod support (not shown).

5-1 When the swing arm 13 returns to its original position, the sleeve 10A is fixed by the drifter 3, so the magazine plate 17
automatically rotates one pitch. (Fig. 7) 6. Move the drifter 3 forward and screw the rod 9A and the sleeve 10 together.

By repeating the abnormal operation, the rods in the rod changing device 5 are sequentially supplied to proceed with the drilling work.

The rod is recovered as follows: (When the rod is recovered after the drilling operation is completed) 1. When the drilling operation is completed, move the drifter 3 backward. At this time, the other rod is supported by a rod support (not shown).

2. With the sleeve 10 clamped by the centrifuge 4, the drifter 3 rotates the rod 9A to unscrew the sleeve 10 and the rod 9A.

3. Extend the hydraulic cylinder 32 of the rod replacement part 5 and tilt the swing arms 13, 41 forward. At this time, sleeve 10A (and rod 9A)
enters through the loading/unloading entrance 13a of the swing arm 13 and the loading/unloading entrance 41a of the swing arm 41.

3-1 Since the sleeve 10A is fixed by the drifter 3 when the swing arm 13 falls forward, the magazine plate 17 automatically rotates one pitch. (Fig. 8) 3-2 As the swing arm 13 falls forward, the swing arm 41 also falls forward, and the magazine plate 17 also rotates exactly one pitch.

4. Extend the lock cylinder 24 and grip the sleeve 10A with the clamp 15.

5 By rotating the drifter 3, it is unscrewed from the sleeve 10A, and then the rod 9 is unscrewed from the sleeve 10A.
A and the sleeve 10A are stored in the magazine device 11.

6. Retract the hydraulic cylinder 32 and return the swing arm 13 to its original position.

By repeating the above operations, the rods are sequentially collected into the rod exchanging device 5.

Effects of the Invention (a) When the rods in the rod changing device 5 are carried to the changing position, the rods in the magazine plate 17 are moved one pitch at a time, and a power source is not required, making rod changing easy. The structure of the device is simplified and reliability is improved.

(b) By gripping the sleeve 10 between the clamp 15 and the lock cylinder 24, threads can be easily connected to the rod, making it easy to add and recover the rod.

[Brief explanation of the drawing]

1 to 8 show an embodiment of the rod changing device for a crawler drill according to the present invention. FIG. 1 is a side view showing the front part of the guide cell of the crawler drill, and FIG. 2 is a cross section showing the rod changing device. 3 is a sectional view of FIG. 2, FIG. 4 is a sectional view of FIG. 2, FIG. 5 is a sectional view of FIG. 2, and FIG. 6 is a sectional view of FIG. FIG. 7 and FIG. 8 are operation explanatory diagrams. 2... Guide cell, 3... Drifter, 5... Rod exchange device, 9... Rod, 10A... Sleeve, 11... Magazine device, 12... Indexing device, 13... Swing arm, 15... Clamp , 24...Lock cylinder.

Claims (1)

[Claims] 1. In a crawler drill configured to sequentially connect multiple rods via a sleeve, a clamp having recesses having the same diameter as the sleeve and equally spaced on the same circumference, and recesses having the same diameter as the rod. By rotatably supporting a member that is integrally fixed to a magazine plate having the same circumference and at equal intervals on the same circumference and in positions where the phases of the respective recesses match, the rod can be a swing arm that can be accommodated and swingable so that the center of the accommodated predetermined rod can be moved between a center position of the crawler drill and a position retracted therefrom;
means for swinging the swing arm; and a means provided opposite to the recess of the clamp at the position where the predetermined rod is housed, and capable of gripping the sleeve between the recess and the recess by extending toward the recess. 1. A rod changing device for a crawler drill, comprising locking means, wherein the gripped sleeve is in a position where it can engage with a drifter of the crawler drill.