JP3970444B2 - Drill rod mounting bracket - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lifting device for a drilling rod in an excavator.
[0002]
[Prior art]
In an excavator using a drilling rod such as a screw auger, as illustrated in FIG. 1, a leader mast 2 is supported by a traveling work machine 1 by a pin 3 and an extendable stay 4 so as to be raised and lowered. A drive unit 6 is attached to a guide rail 5 attached to the front longitudinal direction of 2 in a vertically movable manner, and is wound up and down by a winch on the work machine 1 via a sheave 7 at the upper end of the leader mast 2. A drive unit 6 is suspended by a rope 8, and an upper end of a screw auger 10, which is an example of an excavating rod, is connected to an output shaft 9 of the drive unit 6, and the screw auger 10 is rotated by driving the drive unit 6. The ground is drilled by the auger head 11 and earthed upward by the screw blades 10a.
[0003]
In such an excavator, when excavating a hole to a predetermined depth with one screw auger 10, when the first one screw auger 10 is buried in the ground, the drive unit 6 is separated and driven. The part 6 is lifted above the leader mast 2, and a new screw auger is buried in the drive part 6 and the ground and added between the screw auger 10 to continue excavation.
[0004]
As shown in FIG. 2, the connecting portion for adding the screw auger 10 includes a male joint 12 having a polygonal cross section (usually a hexagonal cross section) at one end of the screw auger 10 and a female joint (which is fitted to the other end). (Not shown) are provided, and when these joints are fitted, semicircular cutouts 14 and 14 are formed for inserting the locking pins 13 and 13 across the two.
[0005]
[Problems to be solved by the invention]
In order to add the screw auger 10 as described above, the newly connected screw auger is suspended and connected in a vertical posture by a crane or the like, and the wire to the end of the screw auger after the suspension is suspended. Since it is a work at a high place, it is not only dangerous but also a difficult task.
[0006]
The present invention eliminates the need to detach wires at a high place when adding a drilling rod, and eliminates the dropping of the drilling rod when a new drilling rod is suspended, thereby improving efficiency and safety. An object of the present invention is to provide a high excavating rod suspension device.
[0007]
[Means for Solving the Problems]
As a means for solving the above problems, the present invention provides a suspension metal fitting body having an insertion hole that can be fitted to a male joint of a drilling rod such as a screw auger in an excavator, and a suspension fitting attached to the upper portion of the body. A drilling rod suspension fitting comprising: a holding hook; and a locking pin that is provided so as to protrude and retract in a horizontal direction so as to engage and straddle a notch on the side surface of the male joint by protruding and retracting from the inner surface of the insertion hole. An elevating cylinder that is externally fitted to the hanger body so as to be movable up and down and moves the locking pin in and out of the inner surface of the insertion hole by moving up and down, and an outer periphery of the hanger body at a position below the elevating cylinder And an elevating cylinder lowering restricting operation ring member for preventing the elevating cylinder from descending at the highest position of the elevating cylinder, and preventing the elevating cylinder from rising at the lowest position of the elevating cylinder provided at the upper position of the elevating cylinder. for In that a configuration in which androgynous and Futsutsu elevation regulating stopper member.
[0008]
The locking pin is inserted through an inclined hole formed in the peripheral wall of the lifting cylinder, and the locking pin moves in parallel by the vertical movement of the lifting cylinder with respect to the suspension metal fitting body so as to protrude from the inner surface of the insertion hole. It is preferable to do so. Also, an upwardly-facing engagement protrusion is provided on the lifting cylinder lowering restricting operation ring member, and an engagement recess into which the engagement protrusion can be fitted is formed at the lower end of the lifting cylinder. It is preferable that the elevating cylinder is held in the ascending position at the upper end when the engaging projection is released from the engaging recess.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described with reference to the embodiment shown in the drawings, with the same reference numerals used for members common to FIG.
[0010]
FIG. 2 shows the state of the embodiment of the hanging bracket 15 of the excavation rod 10 such as an auger screw according to the present invention before the attachment to the excavation rod 10, and FIG. 3 shows the state after the attachment.
[0011]
The suspension fitting main body 16 of the suspension fitting 15 is a cap-shaped member formed such that an insertion hole 17 having a cross-sectional shape matching the cross-sectional shape of the male joint 12 at the upper end of the excavation rod 10 is opened on the lower surface. A pair of bearing portions 18 and 18 project from the upper surface, and a base portion of a suspension hook 19 is pivotally supported by a shaft 20 between the bearing portions 18 and 18, and the bearing portions 18 and 18 through which the shaft 20 passes. The long holes 21 and 21 are long in the vertical direction.
[0012]
A cylindrical elevating cylinder 22 is fitted on the outer periphery of the hanging bracket main body 16 so as to be slidable in the vertical direction, and bearings 23 and 23 are projected at symmetrical positions on the diameter line of the upper end of the elevating cylinder 22. The end portions of the shaft 20 that pivotally supports the suspension hook 19 are inserted into the bearing portions 23, 23, and are secured by a head 20a and a retaining member 20b.
[0013]
Locking pin fitting portions 24 and 24 are formed on both side portions of the insertion hole 17 of the hanging bracket main body 16 so as to partially wrap in the insertion hole 17. Locking pins 13 and 13 having the same cross-sectional shape (circular or flat oval cross-sectional shape) are inserted, and a long hole shape through which both end portions of the locking pins 13 and 13 are inserted in the peripheral wall of the elevating cylinder 22. When the locking pins 13 and 13 are positioned at the upper ends of the inclined holes 25 and 25, that is, the elevating cylinder 22 is provided. When placed in the lowest position, as shown in FIGS. 2, 8A and 8B, the distance between the left and right locking pins 13, 13 is maximized, and the inside of the insertion hole 17 of the hanging bracket body 16 The locking pins 13 and 13 are located under the inclined holes 25 and 25 in a position retracted from the side surface. 3, that is, when the lifting cylinder 22 is at the highest position, the locking pins 13, 13 are closest to each other in the insertion hole 17 as shown in FIGS. 3, 9 (A), (B). The part enters and can be engaged with the notches 14 and 14 on the side surface of the male joint 12.
[0014]
On the outer periphery of the lower end of the hanger body 16, there is provided an elevating cylinder lowering restricting operation ring member 26 for preventing the elevating cylinder 22 from descending at the highest position.
[0015]
The actuating ring member 26 is rotatably supported on a receiving portion 27 protruding like a bowl at the lower end of the hanging metal fitting 16, and a quadrangular engagement protrusion is formed on the upper surface of the actuating ring member 26 at two symmetrical positions on the diameter line. 28 is formed, and the engaging projection 28 can be freely fitted into engaging recesses 29 and 29 cut at two symmetrical positions on the diameter line of the lower end of the lifting cylinder 22. When the engaging recess 29 is fitted, the elevating cylinder 22 is in the lowest position, and when the engaging projection 28 is located at a lower end other than the engaging recess 29 of the elevating cylinder 22, the elevating cylinder 22 is in the highest position. Is supposed to be retained.
[0016]
Corners 28a and 29a are provided at the engaging side corners of the engaging protrusions 28 and the engaging recesses 29 for smooth engagement and disengagement.
[0017]
The operating ring member 26 is always placed at a position where the engaging projection 28 is removed from the engaging recess 29 by the tension spring 30 stretched between the spring receiver 26 a and the spring receiver 27 a of the receiving portion 27. The operating ring member 26 is rotated against the tension spring 30 by pulling the operating wire rope 31 that is urged and bound to the rope stopper 26b of the operating ring member 26, and the engaging projection 28 is moved up and down. It can be moved to the position of the engagement recess 29 of the tube 22 to be fitted. Reference numeral 32 denotes a guide for the operation wire rope 31.
[0018]
On the upper part of the hanging metal fitting 16, a lifting / lowering cylinder lifting restriction stopper member 33 for preventing the lifting / lowering cylinder 22 from being lifted at the lowest position is provided.
[0019]
The stopper member 33 is in the form of an elongated rectangular plate, and an intermediate portion of the stopper member 33 is rotatably supported by a shaft 35 on a bearing portion 34 projecting from the periphery of the upper surface of the suspension metal fitting 16, and a spring (not shown). In this vertical posture, when the tip 33a of the stopper member 33 comes into contact with the upper surface of the lifting cylinder 22, the lifting cylinder 22 is regulated so as to keep the lowest position. It is like that.
[0020]
An operation wire rope 36 is bound to the base end of the stopper member 33, and the wire rope 36 is guided downward via a guide 37. Note that the stopper member 33 may be in a vertical posture by weight balance without being biased by a spring.
[0021]
Next, the operation will be described together with the operation procedure of the above embodiment.
[0022]
When excavation into the ground progresses and a new excavation rod 10 is added to continue excavation, the drive unit 6 is separated from the existing excavation rod 10 and lifted upward, and the excavation rod separated from the drive unit 6 An additional space is secured between 10 and 10.
[0023]
On the other hand, the excavating rod 10 to be added is laid sideways, and the male joint 12 is inserted into the insertion hole 17 of the hanging bracket main body 16, and after this state, the stopper member 33 is tilted so that the lifting cylinder 22 can be raised. Then, the lifting cylinder 22 is moved to the highest position. As a result, the locking pins 13, 13 are moved in a direction approaching each other due to the inclination of the inclined holes 25, 25 of the elevating cylinder 22, engage with the notches 14, 14 of the male joint 12, and Are combined so that they cannot be pulled out (FIGS. 3, 9A and 9B).
[0024]
Further, when the lifting cylinder 22 reaches the highest position, the engaging recess 29 of the lifting cylinder 22 is disengaged from the engaging protrusion 28 of the operating ring member 26, so that the operating ring member 26 is pulled by the tension spring 30 and rotated. In this manner, the engaging projection 28 is located on the lower end surface of the lifting cylinder 22 that is disengaged from the engaging recess 29 to prevent the lifting cylinder 22 from descending, and the coupling state of the male joint 12 by the locking pins 13 and 13 is maintained. To do. At this time, the stopper member 33 is placed sideways along the upper end of the lifting cylinder 22.
[0025]
After that, a wire rope is hung on the hanging hook 19 of the hanging metal fitting and suspended by a crane or the like, and the additional excavation rod 10 coupled to the hanging metal fitting 15 is brought right above the existing excavation rod 10. Are connected. During this time, since the operating ring member 26 prevents the lifting cylinder 22 from being lowered, there is no possibility that the coupling between the hanging bracket 15 and the excavation rod 10 is released.
[0026]
When the connection between the extension excavation rod and the existing excavation rod is completed, the operation ring member operation wire rope 31 is pulled to rotate the operation ring member 26 against the tension spring 30, and the engagement protrusions thereof. 28 is moved to the position of the engaging recess 29 of the elevating cylinder 22 so that they are matched.
[0027]
Thereafter, if the wire rope that holds the suspension metal fitting 15 is loosened, the pivot 20 of the suspension hook 19 descends to lower the lifting cylinder 22, whereby the locking pins 13, 13 are connected to the inclined holes 25, 13. As a result of the inclination of 25, it moves gradually away from the notches 14 and 14 of the male joint 12, and the coupling of the hanging bracket 15 and the excavation rod 10 is released (FIGS. 8A and 8B).
[0028]
Further, as the elevating cylinder 22 is lowered, the stopper member 33 is gradually converted to an upright posture by a spring bias (not shown), and the tip 33a abuts against the upper end surface of the elevating cylinder 22 to prevent the elevating cylinder 22 from rising.
[0029]
If the suspension fitting 15 is lifted in this way, the suspension fitting 15 is separated from the male joint 12 of the excavation rod 10 (FIG. 2).
[0030]
Thereafter, the drive unit 6 and the male joint 12 of the excavating rod 10 are connected to complete the work.
[0031]
In addition, although the said effect | action demonstrated the addition of the excavation rod 10, it can perform by the same procedure also in the collection | recovery operation | work of the excavation rod 10. FIG. When the lifting cylinder 22 is raised when engaging the locking pins 13 and 13 with the notches 14 and 14 of the male joint 12 after the suspension fitting 15 is crowned on the male joint 12 of the existing excavation rod 10 during the recovery operation. The stopper member 33 may be brought down by pulling the operation wire rope 36.
[0032]
【The invention's effect】
As described above, according to the present invention, it is not necessary to hang up the hoisting wires at a high place when connecting the excavation rod for extension, so that the extension work can be performed without involving dangerous work. Of course, the actuating ring member reliably prevents the lifting cylinder from descending, so there is no possibility that the coupled state with the excavating rod is released during the addition work.
[Brief description of the drawings]
FIG. 1 is a side view showing an example of an excavator.
FIG. 2 is a front view showing an embodiment of the hanging metal fitting according to the present invention and showing a state before the excavation rod is connected.
FIG. 3 is a front view showing a state after connection.
4 is a plan view of FIG. 2. FIG.
5 is a cross-sectional view taken along line AA in FIG.
6 is a plan view of FIG. 3. FIG.
7 is a cross-sectional view taken along line BB in FIG. 3;
8 shows the position of the locking pin in the state of FIG. 2, (A) is a schematic longitudinal sectional view, and (B) is a sectional view corresponding to CC of (A).
9 shows the position of the locking pin in the state of FIG. 3, (A) is a schematic longitudinal sectional view, and (B) is a sectional view corresponding to DD of (A).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Work machine 2 Leader mast 6 Drive part 10 Screw auger (excavation rod)
12 Male Joint 13 Locking Pin 14 Notch 15 Suspension Bracket 16 Suspension Bracket Main Body 17 Insertion Hole 19 Suspension Hook 21 Long Hole 22 Lifting Tube 24 Locking Pin Fitting Portion 25 Inclined Hole 26 Lifting Tube Lowering Control Ring Member 27 Receiving portion 28 Engaging projection 29 Engaging recess 33 Stopper member for restricting raising / lowering cylinder rise

Claims (3)

A suspension fitting main body having an insertion hole that can be fitted into a male joint of a drilling rod such as a screw auger in an excavator, a suspension hook attached to the upper portion of the main body, and an inner surface of the insertion hole A drilling rod suspension fitting provided with a locking pin provided so as to be able to appear and retract in a horizontal direction so as to be engaged with the notch on the side surface of the male joint. An elevating cylinder that is externally fitted to the inner surface of the insertion hole by moving up and down, and is provided on the outer periphery of the hanging metal fitting body at a position below the elevating cylinder at the highest position of the elevating cylinder An elevating cylinder lowering restricting operation ring member for preventing the elevating cylinder, and an elevating cylinder elevating restriction stopper member provided at an upper position of the elevating cylinder for preventing the elevating cylinder at the lowest lowered position. Possession Hanging bracket of the drill rod, wherein the Rukoto. The locking pin is inserted through an inclined hole formed in the peripheral wall of the lifting cylinder, and the locking pin moves in parallel by the vertical movement of the lifting cylinder with respect to the suspension metal fitting body so as to protrude from the inner surface of the insertion hole. The excavation rod suspension fitting according to claim 1 configured as described above. The lifting / lowering cylinder lowering operation ring member has an upward engaging protrusion, and an engaging recess into which the engaging protrusion can be fitted is formed at the lower end of the lifting cylinder. The hoisting bracket for an excavating rod according to claim 1, wherein the hoisting cylinder is lowered and the hoisting cylinder is held at the raised position at its upper end when the engaging projection is detached from the engaging recess.

Images