JPH0571758B2 - - 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.

(c) A rod receiving device 6 is provided to reliably add and collect rods.

(d) Provide a stopper, ratchet mechanism, rod holder, etc. to ensure reliable operation in any working position.

Function The rod receiving device and rod holder allow rods to be added and recovered easily and reliably in any working position.

Embodiment In FIGS. 1 to 20, 1 is a guide cell support mounted on a vehicle so as to be able to rise and fall freely, and 2 is a guide cell support that is slidably mounted on the guide cell support 1 according to the distance between the drilling point and the vehicle body. Guide cell, 3
4 is a drifter that moves back and forth on the guide cell 2 and applies impact and rotation to the rod; 4 is a centralizer that is attached to the tip of the guide cell 2 and supports and guides the rod;
5 is a rod exchanging section, and 6 is a rod receiving 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 exchange section 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 pin 3 that is attached to the bracket 31 at one end and 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.

45 is a cam, which connects the nut 47 via a tapered portion formed on the shaft portion of the shaft 18 and a spacer 46.
is fixed to the shaft 18 by tightening the
It rotates in phase simultaneously with the magazine plate 17. The cam 45 is a regular polygon with a recess 45 in the center of each side.
It has a.

A lever 48 is rotatably attached to the swing arm 41 with a pin 49. 50 is a roller attached to the lever 48. A spring 51 is attached between a pin 52 fixed to the lever 48 and a pin 53 fixed to the swing arm 41, and applies a tensile force to the lever 48 to press the roller 50 against the cam 45.

54 is a bracket attached to the guide cell 2 with bolts.

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.

The rod receiving device 6 consists of the following members: 61 is a hook, 62 is a rod support,
The hook 61 and rod support 62 are connected by a bar 63. A pawl 64 is rotatably attached to the hook 61 via a pin 65. A torsion spring 66 is attached to the pin 65 and has one end attached to the plate 67 of the hook 61 and the other end pressed against the lower end of the plate 61a to apply a downward force to the pawl 64. 68 is a ratchet fixed to the guide cell 2, 69 is a guide for the hook 61 attached to the guide cell 2, and 70 is a stopper fixed to the guide cell 2. The plate 67 has locking portions 67a and 67b.

In the rod support 62, 71 is a bracket that is movable while being guided by the guide cell 2, and 72 is a support rotatably attached to the bracket 71 by a shaft 73. 74 is a torsion spring;
It is attached to the shaft 73 and press-fitted to the upper surface of the bracket 71 and the back surface of the support 72 to apply a forward force to the support 72. 75 is a plate fixed to the front surface of the support 72, and 76 is a roller attached to the plate 75. 77 is a plate fixed to the side surface of the support 72, and 78 is a rod holder rotatably attached to the plate 79 fixed to the plate 77 via a pin 80. The support 72 and the rod holder 78 are provided with recesses 72a and 78a for receiving the rods 9A. A leaf spring 81 is attached to the plate 79 and urges the rod holder 78 downward. 82 is an inclined plate fixed to the guide cell 2. 83 is only one long pin among the pins used to connect the chain 7, and is capable of engaging with the locking portions 67a, 67b of the hook 61.

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 being propelled reaches a predetermined position, move the drifter 3 along the guide cell 2. and make them retreat.

At that time, the long pin 83 incorporated in the chain 7 moves rearward due to the drive of the chain 7, and the pawl 6
4 and pushes up, so that the pawl is released from the ratchet 68. (Figure 20) Long pin 83
pushes the locking portion 67b of the hook 61, and the rod receiving device 6 moves backward together with the drifter 3.
(Fig. 19 → Fig. 13) As the rod receiving device 6 moves backward, the roller 76 of the rod support 62
is gradually lifted upward along the inclined plate 82, and eventually turns over, allowing the support 77 to receive the rod. (Figures 13 and 17
(Figure) 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
Clamp 15 the sleeve 10A screwed together with A.
Grip with. (Figures 4 and 5) At this time,
The rod 9A to be spliced coincides with the drilling center line.

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. (FIGS. 10 and 12) When the swing arms 13, 41 return to their original positions, the rods 9a are attached to the rod holders 78 of the rod supports 62.
are opened and received within the recesses 72a, 78a.

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. 10) 5-2 When the swing arm 13 returns to its original position, the swing arm 41 also returns to its original position, and the cam 45 also rotates. (Fig. 12) At this time, the cam 45 pushes up the roller 50 and rotates, passing over the apex angle of the regular polygon and moving to the next recess 45.
Drop the roller 50 into a. As a result, the magazine plate 17 rotates by one pitch, allowing accurate positioning of each phase.

6. Move the drifter 3 forward and screw the rod 9A and the sleeve 10 together.

7 As the drifter 3 advances during the drilling operation, the long pin 83 incorporated in the chain 7 pushes the locking portion 67a of the hook 61, and the rod receiving device 6
moves forward. As the rod receiving device 6 moves forward,
The roller 76 of the rod support 62 falls and rotates along the inclined surface of the inclined plate 82, and is removed from the rod 9A.

8. After the long pin 83 passes through the sprocket 8 and is wound downward, the rod receiving device 6 is pushed by the drifter 3.

By repeating the above operations, the rods in the rod exchanger 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, the drifter 3 is moved back.

At that time, the pawl 6 is pushed up by the long pin 83.
4 is released from the ratchet 68.
(FIG. 20) The long pin 83 pushes the locking portion 67b of the hook 61, and the rod receiving device 6 moves backward together with the drifter 3. The rod support 62 will eventually turn over and receive the rod. (FIGS. 19 and 13) 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. 11) 3-2 As the swing arm 13 falls forward, the swing arm 41 also falls forward, and the magazine plate 17 also rotates. At this time, the cam 45 also pushes up the roller 50 and rotates, and the roller 5 passes over the apex angle of the regular polygon and enters the next recess 45a.
Drop 0. As a result, the magazine plate 17 is accurately rotated in pitch, so that the sleeve 10 is placed in a position where it can be clamped by the lock cylinder 24.

4. To release the screwing between the drifter 3 and the sleeve 10, extend the lock cylinder 24 and grip the sleeve 10 with the clamp 15.

5 By rotating the drifter 3, it is unscrewed from the sleeve 10, and then the rod 9A is
and the sleeve 10 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.

Function of the rod support 62: When adding or retrieving a rod, it moves backward to receive the rod, and when drilling a hole, it moves forward to lengthen the forward distance of the drifter 3.

Action between the locking parts 67a and 67b of the hook 61: After propelling the rod into the ground, the inside of the hole is cleaned. This is an operation in which the drifter 3 is moved back and forth many times to send air into the hole. Since it is undesirable for the rod receiving device 6 to move forward and backward every time the drifter 3 moves forward and backward, the locking portions 67a and 67b are provided apart to prevent the long pin 83 from acting on the locking portions 67a and 67b. .

Action of the ratchet 68: The engagement of the pawl 64 with the ratchet 68 prevents the rod receiving device 6 from retreating when the guide cell 2 is turned upward.

The long pin 83 of the chain 7 for moving the drifter 3 comes into contact with the pawl 64, and due to the pressing force of the long pin 83, its pawl is released from engagement with the ratchet 68, allowing the rod receiving device 6 to move rearward. becomes.

Function of stopper 35: When adding or recovering rods when the guide cell 2 is facing upward, the stopper 35 rotates to prevent the rod 9 and sleeve 10 from falling toward the drifter 3. (Fig. 6) Function of stopper 70: Eliminates the inconvenience of receiving the entire weight of the rod receiving device 6 only by the long pin 83 when the guide cell 2 is oriented upward.

Effects of the Invention (a) When the rods in the rod receiving device 6 are carried to the changing position, the rods in the magazine plate 17 are automatically fed one pitch at a time, and a power source is not required. This simplifies the structure and improves reliability.

(b) The provision of the rod receiving device 6 makes it possible to reliably add and collect rods, and the provision of the rod holder 78 allows the rod to be replaced in any working position by holding the rod.

[Brief explanation of the drawing]

1 to 20 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 FIGS. 2 to 12 are rod exchange device,
Figures 13-20 show the rod receiver.
Figure 2 is a cross-sectional view showing the rod exchange device, Figure 3 is a cross-sectional view of Figure 2, and Figure 4 is a cross-sectional view of Figure 2.
5 is a sectional view of FIG. 2, FIG. 6 is a sectional view of FIG. 2, and FIG. 7 is a sectional view of FIG. 2.
A cross-sectional view, Figure 8 is a cross-sectional view of Figure 7, and Figure 9 is a cross-sectional view of Figure 7.
10 to 12 are operation explanatory diagrams, FIG. 13 is a side view schematically showing the rod receiving device, and FIG. 14 is a sectional view taken in FIG. 13. Fig. 15 is a cross-sectional view of Fig. 16, and Fig. 16 is a - cross-sectional view of Fig. 14.
A sectional view, FIG. 17 is a side view showing the rod cradle,
Figure 18 is a cross-sectional view of Figure 17, and Figure 19 is a sectional view of Figure 17.
20 through 20 are explanatory views of the operation. 1... Guide cell support, 2... Guide cell, 3... Drifter, 5... Rod replacement part, 6...
...rod receiving device, 9...rod, 11...magazine device, 12...indexing device, 15...clamp, 24...lock cylinder, 32...hydraulic cylinder, 45...cam.

Claims (1)

[Claims] 1. A rod changing device that transfers rods to and from a drifter 3 via a rod receiving device 6, comprising: a magazine device 11 including a swing arm 13, a clamp 15, and a magazine plate 17; and a swing arm. 41, an indexing device 12 equipped with a cam 45, a shaft 37 that firmly connects both the swing arms 13 and 41, and the magazine plate 17 and the indexing device 12.
a shaft 18 to which the magazine device 11 and the indexing device 12 are attached; and a cylinder 32 which rotates the magazine device 11 and the indexing device 12 around the shaft 36.
and a plurality of recesses 17a provided at equal intervals on the circumference of the magazine plate 17 and accommodating the rods, the magazine device 11, the indexing device 12, and the rod receiving device are interlocked with the forward and backward movement of the drifter. 6. A crawler drill rod changing device, characterized in that the rod changing device is configured to operate as shown in FIG.