JP2002322667A - Deep-digging clamshell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deep-digging clamshell reducing the number of hydraulic hoses without enlarging the scale of a supporting body of a clamshell bucket and capable of digging the bottom part of a manhole for a sewerage deeper than a conventional one. SOLUTION: A winch 11 is attached to a bracket 12 attached to a working link 7 of a self traveling working machine 1. The clamshell bucket 9 is supported by a wire rope 10 wound around and fed out by the winch 11. The single hydraulic hose 35 wound around a hose reel 36 attached to the working link 7 or the bracket 12 is connected to the clamshell bucket 9. The clamshell bucket 9 is provided with an energizing means energizing a bucket shell in a constantly opening direction and a cylinder closing the bucket shell by a pressure oil fed by the hydraulic hose 35.

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deep dig clamshell which supports a clamshell bucket via a support means which can extend and contract downward from a work link of a self-propelled working machine.

2. Description of the Related Art Underground sewers have manholes for discharging slime, which obstructs the flow of sewage, onto the ground.
As for the sludge remaining in the sewer between manholes, a rope is stretched through the sewer between two manholes, a molding ball is attached to the rope, and the molding ball is caused to flow along the sewer, thereby peeling the gutter on the inner wall of the sewer. It is then washed and collected at the bottom of the manhole, and the gathered skull is scooped up by the deep clamshell and transported by truck to the designated place. As such a conventional deep-drilled clamshell, as disclosed in Japanese Patent Application Laid-Open No. H11-81440, a clamshell is provided at an end of a work link of a self-propelled work machine via a telescopic rod which can be extended and contracted downward. When the bucket is attached and scooping the stirrer that accumulates at the bottom of the manhole, extend the telescopic rod, close the clamshell bucket from the open state, shrink the telescopic rod, raise the work link and rotate the work machine body. , Open the clamshell bucket on the truck bed and discharge.

In urban areas, the sewer system tends to be deeper due to the development of subway lines. In the past, the depth was about 20 m at most.
In recent years, some with a depth of about 40 m to 50 m have appeared.
When the sewer becomes deep in this way, it is difficult to construct a conventional clamshell using the above-described telescopic rod that can reach the bottom of the manhole. That is, if the number of steps of the telescopic rod is increased in order to increase the reaching depth of the bucket, the size of the telescopic rod increases, and it becomes difficult to insert the telescopic rod through the manhole. In addition, the weight of the telescopic rod increases, and a large-sized work machine must be used.When working on manholes provided on the side of the road or on the sidewalk, it becomes a hindrance to traffic and the work becomes difficult. It becomes difficult to do. In addition, the conventional clamshell bucket is generally opened and closed using a hydraulic cylinder, which requires a total of two hydraulic hoses to go back and forth in order to extend and retract the hydraulic cylinder, and two hose reels for feeding out the hydraulic hose. This is necessary, and the size is further increased, and it becomes difficult to insert the hydraulic hose together with the telescopic rod into the manhole. In view of the above problems, the present invention can reduce the number of hydraulic hoses without increasing the size of the clamshell bucket support, and can excavate deeper sewer manhole bottoms and the like than before. To provide a deep dig clamshell. It is another object of the present invention to provide a deep dig clamshell that can raise and lower the clamshell bucket in a stable posture without using a telescopic rod as a support for the clamshell bucket.

According to a first aspect of the present invention, there is provided a deep-drilled clamshell, wherein a winch is attached to a bracket attached to a work link of a self-propelled work machine, and the clamshell bucket is wound and fed by the winch. And one hydraulic hose wound on a hose reel attached to the work link is connected to the clamshell bucket, the clamshell bucket being biasing means for constantly biasing the bucket shell in an opening direction; A cylinder for closing the bucket shell by overcoming the force of the urging means with the pressure oil supplied from the hydraulic hose. Thus, by supporting the clamshell bucket with the wire rope, the clamshell bucket can be easily inserted into the manhole regardless of the depth of the manhole. Further, in the case of the wire rope, even if the reaching depth of the clamshell bucket becomes deep, it is not necessary to increase the size so much, and the supporting device can be made smaller and lighter than the telescopic rod. Also, by providing the clamshell bucket with biasing means for opening the bucket shell, the hydraulic hose connected to the clamshell bucket is a single hydraulic hose that supplies pressure oil to a cylinder for closing the bucket shell. In addition, the number of hydraulic hoses is reduced, the insertion is facilitated by the support by the wire rope, the insertion into manholes and the like is facilitated, and the supporting device and the hydraulic device are reduced in size and weight. The force of the urging means for opening the bucket shell can be smaller than the force required when closing the bucket shell. The deep digging clamshell according to claim 2 has an accumulator connected to the cylinder as the urging means according to claim 1, and by a pressure fluid stored in the accumulator when the oil pressure of the pressure oil disappears, The bucket shell may be opened. in this way,
If the accumulator is used as the urging means for opening the bucket shell, a cylinder for supplying the pressure oil in the closing direction can be commonly used, and the arrangement is easier than that of the spring. The deep clamshell according to claim 3 is characterized in that, in claim 1 or 2, the winch supports the clamshell bucket with four wire ropes. As described above, if the clamshell bucket is supported by the four wire ropes, the wire rope can be prevented from being twisted, and the clamshell bucket is stably supported in a fixed direction. A deep clamshell according to claim 4, wherein the winch is attached to the bracket, and the winch has a pair of drums rotated simultaneously and an equalizer sheave, according to claim 3,
The clamshell bucket is provided with a pair of sheaves, one wire rope, a pair of drums of the bracket,
The clamshell bucket is wrapped around a pair of sheaves and the equalizer sheave. Thus, by providing a pair of drums and an equalizer rope to the bracket attached to the work link and performing rope hanging between the pair of sheaves of the clamshell bucket,
In addition to making the direction of the clamshell bucket constant, the equalizer action also prevents the inclination of the clamshell bucket and allows the clamshell bucket to be raised and lowered in a more stable posture. According to a fifth aspect of the present invention, in the deep clamshell according to any one of the first to fourth aspects, the hose reel is attached to the bracket instead of being attached to a work link. in this way,
By attaching the hose reel to the bracket attached to the work link, the excavation attachment can be collectively attached and detached from the work link, and can be easily applied without processing an existing work machine. Claim 6
The deep-drilled clamshell according to any one of claims 1 to 5, characterized in that it has a structure in which the bracket and the clamshell bucket are detachably and integrally connected. As described above, if the bracket to be attached to the work link and the clamshell bucket are configured to be removably connected, during transportation and assembly,
These can be integrated and handled by a crane, which facilitates transportation and assembly.

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a side view showing an embodiment of a deep clamshell according to the present invention in a working state, and FIG. 2 is an enlarged side view of the deep clamshell. 1 and 2, reference numeral 1 denotes a self-propelled work machine. The self-propelled work machine 1 according to the present embodiment is provided on a wheeled traveling body 2 for traveling on a road via a revolving unit 3 via a revolving device 3. 4 and revolving body 4
A driver's cab 5 and a power unit 6 are mounted thereon, and an excavation attachment 8 is attached to a work link 7 attached to the revolving superstructure 4. The work link 7 according to the present embodiment is such that a boom 7a is attached to the revolving unit 4 by a boom cylinder 7b so as to be able to move up and down, and an arm 7c is attached to the boom 7a by an arm cylinder 7d so as to be rotatable. 7a may be provided. The work link 7 includes a wire rope 1 supporting a clamshell bucket 9.
A bracket 12 to which a winch 11 for taking up and feeding out 0 is attached is detachably attached by swinging freely around a pin 13. As shown in FIGS. 3A and 3B, the winch 11 includes a hydraulic motor 14 and a pair of drums 15 and 16 rotated by the hydraulic motor 14.
Having. The pair of drums 15 and 16 have the same diameter, and are concentric and integral. An equalizer sheave 17 is also attached to the bracket 12. The bracket 12 has a box shape, in which the winch 11 and the equalizer sheave 17 are accommodated. On the other hand, a pair of sheaves 19 and 20 are attached to the top of the clamshell bucket 9. The wire rope 10 is wound around one of the drums 15 and is suspended therefrom.
Hung on one sheave 19 of the pair of sheaves, subsequently on an equalizer sheave 17 provided on the bracket 12, subsequently on the other sheave 20 provided on the clamshell bucket 9, and then on the bracket 12. The other drum 16 is wound around the same number of turns as the drum 15. The hydraulic motor 14 controls the drum 15,
When the cable 16 is rotated in the direction in which the wire rope 10 is fed, the clamshell bucket 9 is lowered by its own weight. Conversely, when the drums 15 and 16 are rotated in the winding direction, the clamshell bucket 9 is wound up. Such a support structure of the clamshell bucket 9 has a pair of sheaves 19 and 20 of the clamshell bucket 9, each of which has two hooks, and is supported by a total of four wire ropes. As shown in FIG. 4A, a pair of bucket shells 21 of the clamshell bucket 9 are
Arm 2 rotatably attached to pin 2 by pin 23
It is rotatably attached to the lower end of the device by a pin 25. Between the frame 22 of the clamshell bucket 9 and the bracket 26 fixed to the upper surface of each bucket shell 21, a cylinder 27 for opening and closing the bucket shell 21 is connected and attached by pins 28 and 29. In addition, the cylinder 2 is mounted on the frame 22 of the clamshell bucket 9.
An accumulator 30 is mounted as a biasing means for opening the bucket shell 21 at a position located on the left and right of 7. In the present embodiment, a pair of accumulators 30 are housed and mounted on the frame 22 on both sides of the cylinder 27 in order to balance the weight and secure the capacity of the accumulator. The circuit of the bucket opening / closing cylinder 27 is configured as shown in FIG. That is, when the control valve 31 is at the upper position in the drawing, the pressure of the pressure fluid (air or oil) of the accumulator 30 acts on the bottom chamber a of the cylinder 27, and the rod chamber b
Flows out to the oil tank 32, and the bucket shell 21 opens as shown by a two-dot chain line in FIG. On the other hand, when the operator switches the control valve 31 to the lower position, the revolving unit 4
The pressure oil discharged from the hydraulic pump 33 mounted on is supplied to the rod chamber b via the control valve 31, and the bucket shell 21 is closed. Since a hydraulic circuit between the control valve 31 and the cylinder 27 in FIG. 4B is constituted by a hydraulic hose 35, a hose having a hydraulic torque motor is provided on the arm 7c as shown in FIGS. The reel 36 is mounted. The hose reel 36 winds and feeds a hydraulic hose 35 for supplying hydraulic oil to a cylinder 27 for opening and closing the bucket shell 21 shown in FIG. Is applied. The hydraulic hose 35 wound around the hose reel 36 is hung on a guide sheave 37 attached around the pin 11 at the tip of the working link 7 and on guide sheaves 39 and 40 attached to the bracket 10. It is connected to a joint 41 provided on the frame 22 of the clamshell bucket 9. As shown in FIGS. 3 (C) and 3 (D), the bracket 12 and the frame 22 of the clamshell bucket 9 are each connected to each other at a plurality of locations by pins 44,
43, the bracket 12 and the frame 22 during transportation.
And the pin 44 can be integrally connected by a pin 44 so as not to bend. As shown in FIG. 1, this deep clamshell is a manhole 4 provided in the middle of a sewer 47.
8, the wire rope 10 is inserted by being fed out by a winch 11 with the clamshell bucket 9 closed. At this time, the control valve 31 shown in FIG.
Is supplied to the rod chamber b of the cylinder 27 at the lower position in the drawing, whereby the bucket shell 21 is closed. When the clamshell bucket 9 is lowered, the hydraulic hose 35 is pulled out by its own weight of the clamshell bucket 9 and is drawn out from the hose reel 36.
If the control valve 31 is switched to the upper position before the clamshell bucket 9 reaches the bottom of the manhole 48, the pressure fluid of the accumulator 30
When the piston 7 is pushed, the oil in the rod chamber b of the cylinder 27 flows to the oil tank 32 through the hydraulic hose 35, whereby the bucket shell 21 is opened. Next, lower the clamshell bucket 9 to the bottom of the manhole 48,
The control valve 31 is switched to the lower position and the cylinder 27
By shrinking the head, the spatula 4 at the bottom of the manhole 48
Grab 9 etc. Next, the wire rope 10 is wound up by the winch 11, the clamshell bucket 9 is pulled up to the ground, the turning device 3 of the work machine 1 is operated to turn the revolving unit 4, and the work link 7 is operated if necessary. A clamshell bucket 9 is placed on a truck bed (not shown).
, And the bucket 9 is opened to discharge the soil. These operations are repeated to scoop up the bottom of the manhole 48 and discharge the soil. Thus, by supporting the clamshell bucket 9 with the wire rope 10,
The support of the clamshell bucket 9 can be easily inserted into the manhole 48 regardless of the depth of the manhole 48. Therefore, it is possible to discharge the plume 49 and the like of the manhole 48 of the deep sewer in recent years. Further, in the case of using the wire rope 10, even if the clamshell bucket 9 does not have a large reaching depth, the clamshell bucket 9 does not need to be so large, and the supporting device can be made smaller and lighter than the telescopic rod, and can be attached to a small work machine. Work without interrupting traffic. In addition, by providing the clamshell bucket 9 with a biasing means for opening the bucket shell 21, the hydraulic hose 35 connected to the clamshell bucket 9 allows the cylinder 2 for closing the bucket shell 21 to be closed.
One hydraulic hose 35 for supplying pressurized oil to 7 is sufficient, the number of hydraulic hoses is reduced, the insertion is facilitated by the support by the wire rope 10, and the insertion into the manhole 48 and the like is facilitated. In addition, the size and weight of the supporting device and the hydraulic device can be reduced. A spring may be used as the urging means for opening the bucket shell 21. However, if the accumulator 30 is used as the urging means for opening the bucket shell 21, the cylinder 27 for supplying the pressure oil in the closing direction operates with the pressurized fluid. The cylinder 27 can be used in common as a driving means, and the arrangement is easier than that of a spring, which is advantageous for miniaturization. Further, the wire rope 10 can support the clamshell bucket 9 with one or two hooks. However, as in the present embodiment, the clamshell bucket 9 is supported by the wire rope 10 having four hooks. The wire rope 1
0 can be prevented, and the clamshell bucket 9
Is stably supported in a certain direction. In addition, the provision of the equalizer sheave 17 prevents the clamshell bucket 9 from being tilted, so that the clamshell bucket 9 can be raised and lowered in a more stable posture. FIG.
As shown in (C) and (D), the bracket 12 and the clamshell bucket 9 are configured to be detachably and integrally connected to each other. On the other hand, when attaching and detaching with a crane, these can be handled integrally, and transportation and assembly are facilitated. FIG. 5 shows another embodiment of the present invention, in which a hose reel 36 is attached to a bracket 12 having a winch 11. With this configuration, the excavation attachment can be collectively attached to and detached from the work link 7, and can be easily applied to an existing work machine without processing. When carrying out the present invention, the traveling body 2 may be a crawler type, but by using a wheel type, it is possible to move to a work site by self-propelled on a road without the need of a transport truck. It is easy, convenient and agile.

According to the first aspect, the clamshell bucket is supported by the wire rope, so that the clamshell bucket can reach a deep excavation position. For example, a small vertical hole like a manhole of a sewer can be provided. However, the wire rope, which is the support of the clamshell bucket, can be easily inserted into the manhole. Therefore, it is possible to discharge the sewage from the deep sewer manhole in recent years. In the case of using a wire rope, the winch does not need to be so large even if the clamshell bucket reaches a deeper depth, and the supporting device can be made smaller and lighter than the telescopic rod. For this reason,
Work can be performed without being interrupted by attaching to a small work machine. Also, by providing the clamshell bucket with biasing means for opening the bucket shell, the hydraulic hose connected to the clamshell bucket is a single hydraulic hose that supplies pressure oil to a cylinder for closing the bucket shell. In addition, the number of hydraulic hoses is reduced, the insertion is facilitated by the support by the wire rope, the insertion into the manhole is facilitated, and the supporting device and the hydraulic device are reduced in size and weight. According to the second aspect, since the accumulator is used as the urging means for opening the bucket shell, the cylinder provided on the bucket can be commonly used, and the arrangement is easier than that of the spring. According to claim 3, the clamshell bucket is 4
Since the wire rope is supported by the hanging wire rope, the wire rope can be prevented from being twisted, and the clamshell bucket can be stably supported in a fixed direction. According to the fourth aspect, by providing the equalizer sheave, the inclination of the clamshell bucket is also prevented, and the clamshell bucket can be raised and lowered in a more stable posture. According to the fifth aspect, since the hose reel is provided on the bracket attached to the work link, the attachment for excavation can be collectively attached to and detached from the work link, and processing is not performed on the existing work machine. , Can be easily applied. According to the sixth aspect, the bracket and the clamshell bucket that are attached to the work link are detachably connected to each other. Therefore, during transportation and assembly, they can be integrated and handled by a crane. Becomes easier.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a deep-drilled clamshell according to the present invention in a working state.

FIG. 2 is an enlarged side view of a main part of FIG.

FIGS. 3A and 3B are a partial cross-sectional side view and a partial cross-sectional front view of an attachment for excavation in the present embodiment;
(C) and (D) are a side view and a front view, respectively, showing a connection state between the bracket and the clamshell bucket.

FIG. 4A is a front view of a clamshell bucket according to the present embodiment, and FIG. 4B is a circuit diagram thereof.

FIG. 5 is a side view showing a winch device according to another embodiment of the present invention.

[Explanation of symbols]

1: work machine, 2: traveling body, 3: revolving device, 4: revolving body,
5: cab, 6: power unit, 7: work link,
8: Excavation attachment, 10: Wire rope, 1
1: winch, 12: bracket, 13: pin, 14:
Hydraulic motor, 15, 16: drum, 17: equalizer sheave, 19, 20: sheave, 21: bucket shell, 2
2: frame, 23, 25, 28, 29: pin, 24:
Arm, 30: accumulator, 31: control valve, 35: hydraulic hose, 36: hose reel, 42, 4
3: Connecting part, 44: Pin, 47: Sewer, 48: Manhole, 49: Hedoro

Claims (6)

[Claims] 1. A winch is attached to a bracket attached to a work link of a self-propelled working machine, a clamshell bucket is supported by a wire rope wound and fed by the winch, and is wound around a hose reel attached to the work link. A single hydraulic hose connected to the clamshell bucket, the clamshell bucket being biased by a biasing means for constantly biasing the bucket shell in an opening direction, and a biasing oil supplied by the hydraulic hose. A cylinder that overcomes the force of the means and closes the bucket shell. 2. The deep dig clam shell according to claim 1, further comprising: an accumulator connected to the cylinder as the urging means, wherein the pressure fluid stored in the accumulator when the oil pressure of the pressurized oil is lost. A deep dig clamshell, wherein the bucket shell is opened. 3. The deep clamshell according to claim 1, wherein the winch supports the clamshell bucket with four wire ropes. 4. The clamshell bucket according to claim 3, wherein the winch is attached to the bracket, and the winch has a pair of drums that are rotated simultaneously and an equalizer sheave. , A pair of sheaves is provided, and one wire rope is looped between the pair of drums of the bracket, the pair of sheaves of the clamshell bucket, and the equalizer sheave. Deep dig clamshell. 5. The deep clamshell according to claim 1, wherein the hose reel is attached to the bracket instead of being attached to the work link. 6. A deep dig clam shell according to claim 1, wherein said clam shell has a structure for detachably and integrally connecting said bracket and said clam shell bucket. Clamshell.