JPS6240512B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a crawler drill rod changing device which is improved so that the connecting rod can be changed in a short time.

Conventional crawler drills require splicing rods to be added sequentially as drilling progresses. For this reason,
A rod changing device is provided near the guide cell, and the rod changing device sequentially supplies the joint rods from the magazine, and when drilling is completed, the separated joint rods are stored in the magazine in sequence. Conventionally, the above-mentioned rod exchanging apparatus employs a method in which a connecting rod is stored in a magazine in advance and is carried into the exchanging apparatus using a rotating arm. However, with this method, the structure of the magazine and arm mechanism is complicated and heavy, and the magazine etc. protrude significantly outside the guide cell, so the guide cell itself must be large and strong to withstand this. There were some shortcomings.

This invention has been made with the aim of eliminating such drawbacks of the prior art.The connecting rod is stored compactly around a guide cell, and by rotating around the guide cell, the connecting rod can be transported to a replacement position. It is an object of the present invention to provide a rod changing device for a crawler drill that can reduce the time required to change a joint rod, simplify the structure of the changing device itself, and reduce the weight of a guide cell.

An embodiment of the present invention will be described below in detail with reference to the drawings. In the drawing, 1 is a crawler drill body that can move freely by an undercarriage 3 equipped with a cover belt 2, and can be raised and lowered by a boom cylinder 4 at the front part. Na boom 5
A movable guide cell 7 is pivotally attached to the tip of the boom 5 by a guide cell cylinder 6. The guide cell 7 has a cylindrical shape,
An elongated notch 7a is formed along the axial direction on the outer circumferential portion over almost the entire length, and two guide rails 8 are installed near the longitudinal edge of this notch 7a along the edge. ing. These guide rails 8 have sliding members 1 fixed to the bottom of the drifter 9.
0 is supported. The drifter 9 has sprockets 11 and 1 supported on the upper and lower ends of the guide cell 7.
Both ends of a roller chain 13 that bypasses the roller chain 13 are tied together, and as the roller chain 13 rotates, it is movable along the guide cell 7 while being guided by the guide rail 8. Joint rods 14 on the upper and lower sides of
Upper magazine 15 and lower magazine 1 that store
6 is provided. Above upper and lower magazines 15,1
6, the upper magazine 15 is connected to the guide cell 7 via a bush 17 as shown in FIGS. 3 and 4.
A rotating ring 18 rotatably supported on the outer periphery of
Both ends of the rotary ring 18 are tapered, and these tapered portions 18a form a tapered sliding surface 19a of a receiving member 19 attached to the guide cell 7 so as to sandwich the rotary ring 18.
is in contact with. Further, a substantially sector-shaped rod holding plate 20 is bored from the outer peripheral surface of the rotary ring 18. The rod retaining plate 20 has an arcuate rod retaining groove 20a that is slightly wider than the outer diameter of the connecting rod 14 formed on a circle centered on the center O of the guide cell 7.
A plurality of sleeve housing portions 20b, for example, four sleeve storage portions 20b, each having an inner diameter slightly larger than the outside diameter of the sleeve 14a fixed to one end of the connecting rod 14, are continuously protruding from the upper surface of the sleeve 14 so as to sandwich the rod holding groove 20a. There is. One end of the rod holding groove 20a is connected to the drifter 9.
The sleeve 14a of the joint rod 14 accommodated in the rod holding groove 20a is opened at the side, and the joint rods 14 are sequentially taken in and out from this open portion 20c along the rod holding groove 20a. The sleeve 14a is accommodated in the sleeve storage portion 20b, and the lower surface of the sleeve 14a is in the rod holding groove 20a.
By being locked to the connecting rod 14, the connecting rod 14 is held in a suspended state. Further, a rack 18b is provided on a part of the rotating ring 18 of the upper magazine 15, and this rack 18b is provided with a rack 18b.
A pinion 21a of a drive motor 21 fixed to the receiving member 19 is engaged with the pinion b. The drive motor 21 is connected in series with a drive motor 22 of the lower magazine 16, which will be described later, and rotates the rod holding plate 20 around the center O of the guide cell 7 in synchronization with the rod holding plate 23 of the lower magazine 16. Then, the connecting rods 14 held on the rod holding plates 20 and 23 are sequentially carried to the exchange position A, or the connecting rods 14 at the exchange position A are stored in each rod holding plate 23. The detailed operation will be described later.

On the other hand, one end of a connecting rod 24 for synchronizing rotation with the rod holding plate 23 of the lower magazine 16 is fixed to the lower surface of the rod holding plate 20. Connecting rod 2
The other end of 4 is connected to the lower magazine 1 along the guide cell 7.
It extends to the 6 side and is fixed to the upper surface of the rod holding plate 23 of the lower magazine 16. Lower magazine 16
Similarly to the upper magazine 15, the guide cell 7 has a rotatable ring 25, which is rotated by the drive motor 22. Further, the rod holding plate 23 is protruded from the rotating ring 25, and the rod holding plate 23 has a plurality of, for example, four connecting rods 14 arranged on a circle centered on the center O of the guide cell 7. Slightly large-diameter rod holding holes 23a are bored at equal intervals, and a rod positioning mechanism 26 and a rod clamping mechanism 27 are installed in the middle of the guide cell 7, respectively. The rod positioning mechanism 26 is connected to the guide rail 8 as shown in FIGS. 6 and 7.
A support body 28 on which a leg portion 28a is movably supported.
and a pair of pawls 29 for positioning the joint rod 14 at the exchange position A. The pawls 29 are pivotally supported at the center by a pin 30 on the support body 28. Further, one end of a link 31 is pivotally attached to the base end side of each claw body 29, and the other end side of each link 31 is movably inserted into an elongated hole 28b bored in the support body 28. It is matched by pin 32.

Further, as shown in FIGS. 8 and 9, the rod clamp mechanism 27 has a housing 27a provided on the side surface of a case 7b fixed to the tip of the guide cell 7, and two sets of clamp pads 3 are installed in the housing 27a.
4 and 35 are housed so as to be movable in the approaching and separating directions. The mutually opposing surfaces of these clamp pads 34 and 35 have semicircular notches 34a with a slightly larger diameter than the sleeve 24a of the joint rod 14, and
Notches 35a having a diameter larger than the outer diameter of the sleeve 14 are respectively formed, and by clamping the sleeve 14a and the connecting rod 14 between these notches 34a and 35a, the connecting rod 14 is clamped. In addition, each of the above rod clamp pads 3
One ends of links 36 and 37 are pivotally attached to the back surfaces of each of links 4 and 35. The other end of each link 36, 37 is a bell crank 38, 39 on which a bent portion is pivotally supported.
One end is pivotally connected, and each bell crank 3
A clamp cylinder 40 is provided between the other end sides of 8 and 39,
Both ends of the clamp cylinders 40 and 41 are pivotally connected to each other, and each clamp pad 3
4 and 35 can be moved in the approaching and separating directions.

In the figure, 42 is a drive motor that rotates the sprocket 12 around which the roller chain 13 is wound in order to move the drifter 9 up and down, and 43 is the drive motor for the drifter 9.
This is a locking mechanism that locks the rotation of the joint rod 14 when the joint rod 14 is removed from the shaft, and has a locking member 43b that is movable back and forth by an operating cylinder 43a.

The drilling and rod exchange operations will now be explained. For example, when the guide cell 7 is held almost vertically and the splicing rods 14 are added one after another during drilling, first, at the lowered position of the drifter 9 as shown in FIG. 10a, Clamp pads 34 and 3 are clamped by the respective clamp cylinders 40 and 41 of the rod clamp mechanism 27.
5 to clamp the rear end of the joint rod 14 that has already been driven into the ground, and in this state, reverse the drifter 9 and tighten the shaft 9 of the drifter 9.
a from the sleeve 14a of the connecting rod 14 (FIG. 10b). Next, when the drifter 9 is raised to the upper end of the guide cell 7 as shown in FIG. By rotating the holding plates 20 and 23 in the direction of the drifter 9 around the center O of the guide cell 7, the first joint rod 14 held between each rod holding plate 20 and 23 is moved as shown in FIG. 10d. When the rod is transported to the rod exchange position A which is in line with the shunt rod 9a of the drifter 9, the position at the exchange position A is determined by each pawl 29 of the positioning mechanism 27. In this state, the drifter 9 is lowered and the tip of the shank rod 9a is screwed into the sleeve 14a of the connecting rod 14 which is at the replacement position A as shown in FIG. 10e. When the drifter 9 is raised again, it is at the replacement position. As the connecting rod 14 is pulled up by the drifter 9 as shown in FIG.
The lower end of 4 is the rod holding plate 23 of the lower magazine 16.
The rod is pulled out from the rod holding hole 23a provided in the rod. Next, the drive motor 2 for the upper and lower magazines 15 and 16
1, 22 are reversed, and each rod holding plate 20, 2
3 is moved back from the rod exchange position A (Fig. 10g), and in this state, the drifter 9 is moved back to the 10th position.
As shown in FIG. Figure i). When the connection of each splicing rod 14 is completed, as shown in FIG. 10j, the clamp of splicing rod 14a is released, and the splicing rod 14 is rotated while applying an impact using the drifter 9 to provide for drilling. Once the rod 14 is driven into the ground, the above operation can be repeated again to add a new splicing rod 14. A timing chart of the operation of each part in the above action is shown in FIG. 11. On the other hand, when the drilling work is completed and the joint rod 14 is to be accommodated, the operation is the reverse of the above, and to separate the joint rod 14 from the shaft shaft 9a, the locking member 43b is moved into the sleeve 14 by the operating cylinder 43a.
The shaft 9a may be pressed against the end face of the shaft 9a to lock the rotation, and in this state, the shaft 9a may be reversed and removed.

In the above embodiment, the case where the guide cell 7 is cylindrical has been described, but the channel members 7d may be configured with their openings facing each other as shown in FIG. 12. In this case, the rotary rings 18, 25 of the upper and lower magazines 15, 16 may be rotatably supported on the receiving member 19 by providing a cylindrical portion 19a on the receiving member 19 as shown in FIG. 19a is supported by support members 7c protruding from both sides of the channel member 7d.

As described in detail above, this invention stores a plurality of connecting rods around a guide cell, and rotates the connecting rods around the center of the guide cell to transport the rods into and out of the rod exchange position. As a result, the magazine that holds the joint rod does not protrude significantly outward from the guide cell, and the mechanism is simple and compact. This allows the guide cell itself to be made smaller and lighter, and if the rotation of the shunt rod of the drifter can be used to add and disconnect the connecting rod, there is no need to provide a separate power source. Moreover, since the joint rod can be replaced in a short time, work efficiency can be improved.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is an overall view of the crawler drill, Fig. 2 is a plan view of the guide cell, Fig. 3 is a detailed view of the upper magazine, and Fig. 4 is a diagram showing the line of Fig. 3. 5 is a sectional view taken along the line in FIG. 2, FIG. 6 is a side view of the positioning mechanism, FIG. 7 is a sectional view taken along the line in FIG. 6, and FIG. 8 is the tip of the guide cell. Side side view, Figure 9 is the 8th
10 and 11 are action explanatory views, and FIGS. 12 and 13 are explanatory views of other embodiments. 1 is a vehicle body, 6 is a boom, 7 is a guide cell, 9 is a drifter, 14 is a connecting rod, 15 is an upper magazine, 16 is a lower magazine, 20 and 23 are rod holding plates.

Claims (1)

[Claims] 1 A drifter 9 in which a boom 6 and a guide cell 7 are installed on a self-propelled vehicle body 1 so as to be able to rise and fall, and a connecting rod 14 is driven into the ground in the guide cell 7, and a rod that carries the connecting rod 14 into and out of the drifter 9. In those equipped with a replacement device, the guide cell 7
An upper magazine 15 and a lower magazine 16 having rod holding plates 20 and 23 that rotate around the center O of the guide cell 7 are provided at the upper and lower portions, and a plurality of connecting rods are attached to the periphery of the guide cell 7. At the same time, the rod holding plates 20 and 23 are appropriately rotated by a drive source to move the splicing rod 14 held by these rod holding plates 20 and 23 to the rod that is in line with the shunting rod 9a of the drifter 9. A crawler drill rod changing device characterized by being able to be carried in and out of a changing position A.