JP2731076B2 - Hydraulic hose pull-out device for expanded bottom earth drill and hydraulic hose descent prevention device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic hose or a case from a reel in an earth drill using a bottomed bucket.
The present invention relates to a device for pulling out a cable, and a device for preventing a hydraulic hose from dropping, which is suitable for using the device.

[0002]

2. Description of the Related Art FIG.
FIG. 4 is a side view showing a state in which a normal vertical hole drilling bucket 20 is connected to a keyer of a hydraulic earth drill. FIG.
As shown in FIG. 1, the earth drill vertically supports the keriba 4 with a crane 30, and the keriber 4 is a keriber driving device 21 comprising a hydraulic motor and a power transmission device to the keriba.
To rotate. An earth drill using an expanded bottom bucket as the bucket 20 has a hydraulic hood for mounting the frame 3 on the rotating body side below the center joint 18 and supplying the frame 3 with pressurized oil to an enlarged wing opening / closing cylinder (not shown). And a cable reel 1 wound with a cable 14 for supplying power to the expansion amount detector of the expanding wing of the expanding bottom bucket. The bucket 20 has a connection portion 20a for connecting the worktable 5 and a stabilizer 22 for positioning in the vertical hole and the tip portion 4a of the kerry bar 4 above the central axis.

The cable reel 1 is provided with a spring so that the cable 14 is not loosened even after the joint is connected to the bottomed bucket and the bottomed bucket descends during excavation work. , A constant force for winding the cable 14 is constantly applied. Further, the hydraulic hose 16 is applied with a constant winding force by the hydraulic pressure. However, when the hydraulic source is stopped, the lifting force is stopped by stopping the hydraulic source, and the hydraulic hose 16 is lowered by the hydraulic leak amount of the hydraulic equipment. To prevent this, the joint at the tip of the hydraulic hose 16 is received on the frame 3 by a descent prevention bar.

To connect the bottomed buckets, the leading end 4a of the kerry bar 4 is lowered to be connected to the connecting portion, and the hydraulic hose 16 and the power supply cable 14 are drawn out from each reel and each bottomed bucket is connected. It is performed in connection with the joint of.

Conventionally, when connecting the hydraulic hose 16 and the power supply cable 14, the worker climbs on the frame 3 with a ladder installed from the ground, and connects the joint at the tip of the hydraulic hose 16 to the frame. The hydraulic hose 16 wound around the hose reel 2 was pulled out by hand, and was connected to the joint on the bucket side. Similarly, the power supply cable 14 was also pulled out from the cable reel 1 and connected to the joint on the bucket side.

However, this work requires a worker to climb up to a frame 3 at a height of, for example, about 8 m by using a ladder, which poses a safety problem. There is a problem that work efficiency is poor because a total of two workers are required to connect the joints of the hoses provided below.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a device which can safely and efficiently draw out a hydraulic hose and a power supply cable, and a device for preventing the hydraulic hose from dropping. .

[0008]

In order to achieve the above object, a drawer for hydraulic hoses for a bottomed earth drill according to the present invention is provided with a bottom surface of a kelly drive device of the bottomed earth drill together with a kerry. A device for pulling out a hydraulic hose and a cable wound on a hose reel and a cable reel mounted on a rotating frame. It comprises a drawer pole to which a bar having a hanging portion is attached.

In the hydraulic hose descent prevention device of the present invention, a frame which rotates together with the kerry is attached to the lower surface of the kelly drive device of the bottomed earth drill.
A hydraulic hose descent prevention device for receiving a joint at the lower end of a hydraulic hose wound around a hose reel mounted on a hose to prevent the hydraulic hose from lowering when work is stopped,
A descent preventing member for receiving the joint is mounted to be openable and closable about a support shaft so as to be opened below the frame, and an opening / closing handle is mounted on the descent preventing member to connect the descent preventing member and the frame. Connected by a tension spring,
The connection point of the extension spring on the side of the lowering prevention member is opposite to the line connecting the frame side connection point of the extension spring and the support shaft of the lowering prevention member when the lowering prevention member is fully closed and when the lowering prevention member is fully opened. Side.

[0010]

In the present invention, when the above-mentioned pole is used, a hydraulic hose or a cable can be pulled out from the ground or a work table. Further, in the hydraulic hose lowering prevention device of the present invention, the open portion is maintained by the action of the tension spring by hooking the hook portion of the pawl on the handle and pulling.

[0011]

FIG. 2A is a side view showing a most extended state of a drawer pole according to an embodiment of the present invention, and FIG. 2B is a side view showing a most contracted state. As shown in FIG.
The main body 6a is formed by connecting a plurality of light metal pipes 6c, such as aluminum, to each other in a stretchable manner like a fishing rod, and can be fixed by tightening a screw with a connecting portion 6b, and a hook bar at the upper end of the main body 6a. -10. As shown in FIG. 2B, by loosening the screw of the connecting portion 6b and contracting the main body 6a, the pole 6 can be shortened during transportation or storage.

FIG. 2C is an enlarged plan view of the upper portion of the drawer pole 6, and FIG. 2D is an enlarged side view. FIG. 2 (C),
As shown in (D), a boss 7 formed with a female screw is fixed to a pipe 6c at the upper end of the main body 6a with a bolt 8 and a nut 9 at the upper part of the drawer pole 6, and a screw is formed at the lower end. The formed bar 10 is screwed into the boss 7 and the bar 10 is detachably attached with a fixing nut 11. The bar 10 has a straight portion 10a formed with a screw at the lower end, and a bent portion 10b which is bent into an L-shape at an angle slightly smaller than 90 ° (α <90 °) with respect to the straight portion 10a. 90 at the tip
It has a hook portion 10c formed in an L-shape with an angle smaller than 0 ° (β <90 °).

FIGS. 1A and 1B are side views showing a state in which a cable is drawn out using the draw-out pole of the embodiment. Power supply cable 14 and hydraulic hose 1
6 are wound around the cable reel 1 and the hose reel 2 with a constant force as described above, and the hydraulic hose 16 is moved by an amount corresponding to the hydraulic leak of the hydraulic equipment. Since it descends, the lowering prevention member 12 for preventing this is flared.
Provided in the system 3.

The worker 31 pulls out the work table 5 from the
The bar 10 of the cable 6 is hooked on the joint 15 of the cable 14 wound around the cable reel 1, and the operator 31
And connect it to the joint of the bottom bucket.

As shown in the enlarged view of the bar 10 in FIG. 3, when the hook 10c is hooked on the cable 14, the bending angle α of the bent portion 10b is smaller than 90 ° and the hook 10c Is smaller than 90, the hook 10c and the straight portion 10b hit the joint 15 at two points, and the bar 10 is hung without detaching from the joint 15, and the joint 15 is not shaken, −
Bull 14 is withdrawn.

Next, a hydraulic hole using the draw-out port 6 will be described.
The configuration of the descent prevention member 12 of the blade 16 and the drawing operation thereof will be described with reference to FIG. FIG. 4A is a side view showing a state in which the lowering prevention member 12 is closed, and FIG. 4B is a bottom view. As shown in FIGS. 4A and 4B, an opening / closing handle 12a having a hook portion on the lower side is attached to the descent prevention member 12, and the frame 3 is attached to the frame 3 so as to be openable / closable with the support shaft 3a as a fulcrum. . The descent-preventing member 12 and the frame 3 are connected by a spring 13, and the spring 13 pulls the descent-preventing member 12 toward the stopper 3 b of the frame 3, and the descent-preventing member 12 is at the tip of the hydraulic hose 16. The joint 17 is prevented from opening due to its weight. Reference numeral 3c denotes a stop roller which prevents the hydraulic hose 16 from being caught in the hose roller. The stop roller 3c is provided in a pair, and the distance between the rollers 3c is adjusted by the joint 17c. The joint 17 is set to be larger than the diameter of the main body and smaller than the diameter of the distal end portion 17a to prevent the joint 17 from being pulled up more than the stop roller 3c.

FIG. 4C is a side view showing a state in which the lowering prevention member 12 is opened, and FIG. 4D is a bottom view. FIG.
As shown in FIGS. 3 (C) and 3 (D), the bar 10 of the above-mentioned draw-out pole 6 is hooked on the handle 12a, and the lowering prevention member 1 is moved.
When the hydraulic hose 16 is opened, the hydraulic hose 16 descends by its own weight by the amount of hydraulic leakage. After the lowering prevention member 12 is opened, the pull-out port 6 is pulled out to the hydraulic hose 16 as in the case of the cable 14 described above.
The hook 10c is hooked, and the hydraulic hose 16 is pulled out and connected to the connection port of the widened bucket.

Here, the lowering prevention member 12 of the spring 13
As shown in FIG. 4 (C), the side connection point 12e becomes a frame when the lowering prevention member 12 is fully opened when it comes into contact with the stopper -3d.
Connection point 3e on the arm 3 side and the opening / closing support shaft 3 of the descent prevention member 12
With respect to the line X connecting the line a and the line a, the lowering prevention member 12 is set to be on the right side in the drawing opposite to the closed state. With this setting, the spring 13 can be used as the lowering prevention member 1.
When 2 exceeds the line X, it works so as to be attracted to the stopper -3d, and the descent preventing member 12 can be stopped at the fully open position.

FIG. 5A is a plan view showing a state in which the bar 10 of the draw-out port 6 is hooked on the joint 15 of the power supply cable 14, and FIG. 5B is a plan view of the hydraulic hose 16. It is a top view showing the state where it was hooked on joint 17. FIG.
As shown in (A) and (B), the straight portion 10b of the bar 10
To the joint 15 of the cable 14 or the hydraulic hose 1
6 is brought into contact with the outer periphery of the joint 17 so that the hook 10
By turning in the direction of the arrow when c reaches above the joint 15 or 17, the hook 10c can be hooked on the cable 14 even if the hook 10c cannot be seen directly.

As described above, the use of the draw-out port 6 provided with a hook portion at the tip enables the hydraulic hose 16 and the cable 14 to be safely pulled out from the work table 5 by one person. It can be done by an operator. Drawer pole 6
Since the bar 10 can be replaced, it is possible to select an optimal hook shape such as the hook 10c in accordance with the shape of the joint of the hydraulic hose 16 or the like. Furthermore, since the drawer pole 6 can be extended and contracted, if it is shortened during non-operation, it does not take up space for storage and transportation.

[0021]

According to the first aspect of the present invention, there is provided a drawer pole having a drawer bar having a hook at a tip end.
By using this draw-out pole, the work of drawing out the hydraulic hose and the cable can be performed safely from the worktable or the ground by one worker.

According to the second aspect of the present invention, since the opening / closing handle is provided on the descent prevention member and the descent prevention member and the frame are connected by the tension spring, the descent prevention member can be stopped and set at the fully open position. The pull-out operation of the hydraulic hose can be performed safely from the workbench by one worker without bringing the descent prevention member and the hydraulic hose into contact with each other.

[Brief description of the drawings]

FIGS. 1A and 1B are side views showing a state in which a power supply cable is pulled out using a drawer port according to an embodiment of the present invention.

FIG. 2A is a side view showing the most extended state of the drawer pole of one embodiment according to the present invention, FIG. 2B is a side view showing the most retracted state of the drawer pole, FIG. D) is an enlarged plan view and a side view of the upper end of the draw-out pole, respectively.

FIG. 3 is a side view of an upper part of the drawer pole showing a state in which the drawer pole of the embodiment is hooked on a cable joint.

4A is a side view showing a state in which the descent preventing member 12 of the embodiment is closed, FIG. 4B is a bottom view thereof, and FIG. 4C is a state in which the descent preventing member 12 of the embodiment is opened; And (D) is its bottom view.

FIGS. 5A and 5B are plan views showing steps of hooking a hook portion of a draw-out pole of the embodiment to a cable or a joint of a hydraulic hose.

FIG. 6 is a side view showing a work state of connecting a bucket in an earth drill.

[Explanation of symbols]

 Reference Signs List 1 cable reel 2 hose reel 3 frame 3a support shaft 3b, 3d stopper 3e connection point 4 kerry bar 5 work table 6 draw-out pole 6a main body 6b connection 6c pipe 7 boss 8 bolt 9, 11 Nut 10 Bar 10a Straight portion 10b Bent portion 10c Hook portion 12 Fall prevention member 12a Handle 12e Connection point 13 Tension spring 14 Cable 15, 17 Joint 16 Hydraulic hose 20 Bucket 31 Worker

Claims (2)

(57) [Claims] A frame which rotates together with a keyer is mounted on a lower surface of a key drive device of an expanded bottom drill.
A device for extracting a hydraulic hose and a cable wound on a hose reel and a cable reel mounted on the frame, respectively, wherein a bar having a hook portion at a tip is attached. Bottom-opening arc characterized by a drawer pole
Hydraulic hose drawing device for drilling. 2. A frame which rotates together with a keyer is attached to a lower surface of a key drive device of an expanded bottom drill.
A descent prevention device for a hydraulic hose, which receives a joint at a lower end of a hydraulic hose wound around a hose reel mounted on the frame and prevents the hydraulic hose from lowering when the work is stopped. A descent prevention member for receiving the joint is mounted to be openable and closable about a support shaft so as to be opened below the frame, and an opening / closing handle is attached to the descent prevention member to pull the descent prevention member and the frame. When the lowering prevention member is fully closed and the lowering prevention member is connected to a line connecting the frame-side connection point of the tension spring and the support shaft of the lowering prevention member, the lowering prevention member side connection point of the tension spring is connected with the tension spring. A descent prevention device for a hydraulic hose for a bottomed earth drill, wherein the device is configured to be on the opposite side when fully opened.