JP2759536B2 - Drilling device for casing insertion - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a casing insertion drilling device used in an all-casing method.

[Conventional technology]

Conventionally, as such a drilling device, a tubular crown suspended and supported at the tip of a boom via a flexible strip, and an engaging element at a lower end of a bobbin rope passing through the crown via the tip of the boom. A digging blade that is always open and urged is provided with a hammer grab bucket interlockingly connected so that the digging blade closes when the bobbin rope is tensioned, and is always returned to a release position where the engaging element can pass freely. A first catching device which is energized and attached to the top of the hammer club bucket, and wherein the first catching device suspends the top of the hammer grab bucket at the release position from the crown by tightening the bobbin cord. When the second catching device is engaged between the second catching device and the second catching device which can be engaged so as to be supported by the lowering, the first catching device is engaged when the hammer club bucket is suspended from the crown. Opening the digging blade by blocking only the upward passage of the engaging element With is switched to the engaged position to hold, by providing the interlocking mechanism by the tightening or loosening of the Makidosaku connexion second bunch stop device is switched to the position to obtain solving its engagement,
In order to be able to perform drilling for inserting the casing with a hammer grab bucket hung on a single bobbin rope, or to discharge excavated debris from the hammer grab bucket hung and supported by a crown. Such an apparatus is generally known (for example, see Japanese Utility Model Publication No. 34-18232 and Japanese Utility Model Publication No. 39-21037).

[Problems to be solved by the invention]

However, when discharging drilling debris with this drilling device, the hammer club bucket suspended and engaged with the crown is pushed out and swung to the front of the boom, and the lower end of the drilling blade is opened to open a truck or dump truck. The hammer club bucket must be suspended and engaged with the crown at a height that does not interfere with the casing added to the casing inserted into the ground, while one Since the length of the casing is about 6 m, the noise when the excavated swarf falls from the hammer grab bucket and is loaded on the carrier truck is remarkable, not only is it difficult to use in a densely populated urban area, There was a problem in that when the excavated rock was a crushed piece of rock, the carrier of the truck would be damaged.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problem by configuring a hammer grab bucket for discharging excavated debris to approach a platform of a transport vehicle.

[Means for solving the problem]

In order to achieve this object, the present invention provides a boom delicing device capable of moving a crown or a hammer club bucket back and forth between a perforated position in a ground in a casing and a position above a bed of a truck for excavating waste. The boom is provided with a space in which the upper part of the casing added on the inserted casing can be loosely fitted, and the hammer buck bucket suspended and engaged with the crown is used when the boom is tilted back and forth by the derrick device. Adjustment to increase or decrease the length of the flexible strip between the boom tip and the crown so that it can be raised and lowered between the upper limit position not interfering with the extension casing and the lower limit position close to the carrier of the excavator carrier. The device is mounted on a boom.

The minimum value of the length of the flexible strip between the boom tip and the crown, which is increased or decreased by the adjusting device, is such that the top of the hammer grab bucket lifted so that it does not interfere with the casing when the boom is tilted back and forth by the delicing device, It is preferable that the second holding device is set so as not to be suspended and supported by the crown.

[Action]

The present invention has the above-described configuration, and when piercing in a state where the casing is added to the previously inserted casing,
The crown of the boom fixed to the perforated position of the ground in the casing by the derrick device is held at the upper limit position by the adjusting device, and the hammer grab bucket in which the drilling blade is held open by the first holding device at the engaging position is held. When the first catching device is returned to the release position by lowering freely or lowering the power by the winding drum device and cutting into the ground, and then winding the winding drum by the winding drum, the engaging element at the lower end of the winding drum cable is turned on. The bucket is lifted by the bobbin rope after the digging blade is closed to ascend the first holding device in the release position and store the digging debris in the bucket, and to the second holding device. Thus, the top of the bucket is suspended in engagement with the crown, thus returning the first catch to the engaged position.

Then, while the upper part of the extension casing is loosely fitted in the space of the boom so that the crown and the bucket are located above the bed of the digging waste carrier, the boom is tilted forward, and the By lowering the bucket and the crown supported by it, while making the feeding speed of the flexible strip greater than the feeding speed of the bobbin rope from the bobbin and constantly tensioning the bobbin rope with the weight of the crown and the bucket. If this is done, the crown will reach the lower limit position and its lowering will stop, so that even after the top of the bucket is suspended and supported by the crown by the second holding device, the bobbin rope is extended, so that the winding The digging blades are opened by the downwardly moving passage of the engagement member at the lower end of the trunk cable while pushing and opening the first holding device at the engagement position, and the digging debris in the bucket is discharged onto the carrier of the transport vehicle.

Therefore, the retracting speed of the flexible strip by the adjusting device is made larger than the winding speed of the bobbin rope by the bobbin, and the flexible strip is constantly tensioned by the weight of the crown and the bucket suspended and supported by the crown. However, if the boom is returned to the piercing position after the crown is pulled up to the upper limit position, and the bobbin cord is further tightened, the second holding device is released and the above-described piercing operation can be repeated.

In adjusting the speed of the adjusting device and the winding drum as described above, if the opening of the directional control valve for controlling the drive actuator is adjusted, the digging blade of the bucket is opened unintentionally due to erroneous operation and rocks and the like are removed. If the maximum speed of feeding and retracting of the flexible strip by the adjusting device is higher than the maximum speed of feeding and winding of the bobbin rope by the bobbin, preventing erroneous operation, Although the drilling efficiency is reduced due to the lower hoisting speed of the bucket at the time of drilling, to prevent this, the top of the hammer grab bucket which is extended so that it does not interfere with the casing when the boom is tilted back and forth is described as follows. (2) The minimum length of the flexible strip may be set so as not to be suspended and supported by the crown by the holding device.

Then, after tilting the boom forward to discharge excavated debris, first lower the bucket until it approaches the carrier bed, and then lower the crown by feeding out the flexible strip from the adjusting device. If the bobbin rope is then loosened after the second holding device is engaged, the drilling blade of the bucket suspended and supported by the crown can be opened to discharge the drilling debris. When the bucket which has been discharged is lifted, the flexible strip is lifted and tensioned. However, no problem occurs even if the second holding device is released by erroneously tensioning the bobbin cord. .

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Boom 1
Are both side columns parallel to each other as shown in FIG. 1 and FIG.
The top and bottom of 1a, 1a are fixedly connected by cross beams 1b, 1c, respectively.
Is provided with a space (B) in which the upper portion of the boom 1 is loosely fitted, a tapered portion 1d is provided in the upper portion, and the adjusting device 11 of the flexible strip 2 is attached behind the portion 1d. Both sides of the base end are provided with a plane U provided on the upper front end of a chassis 13 provided with both side crawlers 12.
A crown 3 and a hammer club bucket 6 are pierced on a platform for work replenishment work 14 in a U-shape by means of a derrick cylinder (derrick device) 9 so that the crown 3 and the hammer club bucket 6 can be perforated in the ground in the casing shown by the solid line in FIG. It can be moved back and forth between the position and the position above the carrier 15 of the excavator carrier shown by the chain line in the figure. Reference numeral 50 in FIG. 1 denotes a conventional extruding device mounted on the front of the boom so that the lifted hammer grab bucket is pushed forward and inclined.

The adjusting device 11 connects a center portion between an upper pulley support frame 17 fixed between both side guide rails 16 and a lower pulley support frame 18 slidably mounted between the both side guide rails with a hydraulic cylinder 19. Then, one end of the flexible strips 2, 2 on both sides sequentially passing through a plurality of pulleys 20, 21 symmetrically mounted in the two pulley support frames, respectively, is connected to one pulley support frame (18 in the figure). And the other ends of the flexible strips are sequentially hung on the guide pulley 22 on the pulley support frame 17 and the pulleys 23 and 24 symmetrically attached to the boom tip, respectively. At the lower end of the body, a cylindrical crown 3 is vertically suspended and supported via a suspension frame 25. When the hydraulic cylinder 19 shown in FIG. 2 is fully extended, that is, when the length of the flexible strip between the boom tip and the crown is increased. At the minimum, the top of the hammer club bucket lifted so as not to interfere with the casing 10 'as shown in FIG. 1 or FIG. In a position that does not engage the round. As a means for alerting the crane operator of this fact, if an ordinary overwinding prevention device operated by the connecting portion of the engaging element 5 can be attached to the end of the boom, the third method can be used.
As shown by a dashed line in the figure, a detection tube 47 whose lower end is engageable with the engagement element 5 is inserted into the upper portion of the crown 3, and a warning light is turned on when the flange at the upper end of the detection tube is separated from the crown top surface. A lamp device may be mounted outside the crown.

When the hydraulic cylinder 19 is fully contracted, the crown 3 supporting and suspending the top of the hammer grab bucket approaches the bed 15 at the lowest ground level as shown by the chain line in FIG.

Hamakurabu bucket 6 and crown 3 are the same as Kimiaki Jitsu
A drilling blade 27 (FIG. 1) having a configuration similar to that described in Japanese Patent Application Laid-Open No. 34-18232, which is pivotally attached to the lower end of the cylindrical body 26 of the hammer club bucket so as to be openable and closable, is provided. An engaging element 5 connected to the lower end of the bobbin rope is interlockingly connected via a pulley-based booster so that the bobbin blade closes when the bobbin rope 4 is tightened. Reference numeral 28 in FIG. 3 shows an operating cable of the booster connected to the engaging element 5, in this state, the drilling blade 27 is closed and the hammer club bucket 6 is moved via the operating cable 28 to the bobbin cable 4.
It is suspended and supported.

The first holding device 7 includes a plurality of claws 30 eccentrically and pivotally mounted by pins 31 below a receiving table 29a provided on a top portion 29 of the cylindrical main body 26.
The sliding barrel 32 having a slot 32b corresponding to the tip of the claw includes the cylindrical main body top 29 and a guide barrel 29b integral therewith.
Can be freely mounted only in a certain range. For this reason, the sliding cylinder 32 is urged to return to the release position (see FIG. 3) where the engaging member is allowed to pass upward and the digging blade can be closed by the spring 33 which constantly presses the lower end of the sliding cylinder 32 downward. As will be described later, when the upper end of the sliding cylinder 32 is suspended and supported by the crown 3 and the flexible strip 2 is tightened, the pawl 30 rotates to a horizontal position as shown in FIG. The outer end of the receiving surface 29c at the top of the cylindrical body
And the toe of the sliding cylinder 3 comes from the slot 32b.
It is switched to an engagement position that protrudes into 2 and allows downward passage of the engaging element 5 but blocks upward passage.

In the second holding device 8, a plurality of slots 3a provided on the outer periphery of the cylindrical crown 3 are pivotally connected to respective claws 34, each of which can be inclinedly stored, by a pin 35 attached to the outside of the crown. The claw 34 at the time of operation is supported by the bottom of the slot by the action of gravity as shown in FIG. 4 so that the tip of the claw projects into the crown, and the slot 36a of the annular weight 36 is provided at the outer end of the claw.
Are engaged with each other, and as shown in FIG.
When the hook 36 is not supported by the cradle 29a on the side of the hammer club bucket, the claw 34 is retracted into the slot 3a. However, as shown in FIG. When the crown 3 is lowered by feeding out the flexible strip 2 in a state of being suspended and supported by the bobbin rope 4, the annular weight and the crown are supported on the receiving table 29a. As shown in the figure, the tip of the claw 34 has a hook 32a
Pivots down. Thus, when the first holding device 7 is in the release position, the second holding device is engageable.

However, if the winding drum 4 is pulled out from the winding drum device 56 from this state, after the crown is suspended and supported by the flexible strip 2, the engagement between the claw 34 and the hook portion 32a as shown in FIG. As a result, the sliding barrel 32 is pulled out from the top of the tubular main body 29 while compressing the spring 33, and the grab bucket 6 is suspended and supported by the crown 3. When the bobbin rope is further extended, the engaging element 5 is lowered from the position shown by the solid line in FIG. Dumps in the Hamagulab bucket are discharged.

Next, the hammer club bucket suspended from the crown is lifted while the flexible strip side is tensioned.In this case, if the winding trunk cable side is mistakenly tensioned, the sliding cylinder 32 is moved as described above. Because it is pulled out above the cylindrical body top 29,
As shown in FIG. 6, the pawl 34 is retracted by the gravitational action of the annular weight 36, and the second holding device 7 is released. However, when the driving of the winding device 56 is stopped, the winding drum brake automatically operates. Since the lifted hammer grab bucket re-perforates, the second holding device is released by the loosening of the bobbin cord, so that no problem occurs.

As shown in FIGS. 1 and 7, the casing insertion device shown in FIG. 1 and FIG. 7 supports the front and rear hydraulic jacks on both sides of the platform 14 so as to horizontally support the chassis 13 in cooperation with the hydraulic jacks 37 at the rear end thereof. The outer cylinders 38 and 39 are vertically fixed, and the lower ends of the inner ends of the full hydraulic jack are connected with a horizontal grounding frame 40 capable of loosely fitting the casing 10, and a hydraulic cylinder 41 capable of holding and tightening the casing is provided. A link chain type clamp unit 42 and four hydraulic motors for driving a ring gear fixed substantially concentrically outside the intermediate portion of the clamp unit.
A lifting frame 43 provided with a lifting frame 48 is disposed between the platform and the grounding frame, and vertical lifting frame lifting cylinders 44 are attached to both sides of the platform, respectively, so that the lifting frame can be raised and lowered. A vertically movable Y-shaped link member 49 is provided between the lifting frame and the chassis 13 so as to prevent the rotation of the lifting frame, and the vertical guide of the lifting frame 43 is provided between the right and left front and rear hydraulic jacks 38, 39. The guide rails 45 and 46 are provided with a V-shaped cross-section that slides and engages with vertical V-grooves 43b at the front and rear of the vertical guide portion so as to vertically guide the lift frame by the expansion / contraction stroke of the lift cylinder 44. Are attached to the lower portions of the inner cylinders of the corresponding hydraulic jacks 38, 39 via a hydraulically operated parallel crank mechanism, and while the casing is inserted to a depth determined by the ground, all the guide rails must be It is shown on the upper side of FIG. Engaged with the vertical guide portion, and when inserting the casing into more depth, the
As shown in the lower part of the figure, all the guide rails are detached from the vertical guide portion.

Although the embodiment has been described above, the top of the hammer club bucket lifted by the bobbin rope is suspended and engaged with the crown in order to discharge excavated debris, and then the boom is tilted forward and the crown and hammer are tilted. As described above, the grab bucket may be lowered until the grab bucket approaches the carrier.

〔The invention's effect〕

 According to the present invention, the following effects can be obtained.

(1) The extension of the boom on the casing in which the boom is inserted beforehand is tilted forward so as not to interfere with the casing. Because it was configured to discharge drilling waste, to prevent noise when discharging the built-in drilling waste,
Complaints when drilling in a densely populated urban area can be eliminated, and there is no danger of damage to the carrier of the transport vehicle when the drilling debris is a crushed rock mass.

(2) The minimum length of the flexible strip between the end of the boom and the crown is set so that the top of the hammered club bucket lifted so that it does not interfere with the casing when the boom is tilted forward is not suspended by the crown. Then, even if the bucket lifting speed by the winding drum device is increased to enhance the drilling efficiency, there is no danger of the drilling chips in the bucket dropping accidentally due to erroneous operation, and the drilling chip discharging operation becomes easy.

[Brief description of the drawings]

FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is a rear view of an upper part of a boom, FIG. 3 is a vertical front view showing a relationship between first and second holding devices in the state of FIG. 4 to 6 show FIGS.
FIG. 7 is a vertical sectional front view showing the operation of the second holding device, and FIG. 7 is a cross-sectional plan view of the casing insertion device. 1 ... boom, 2 ... flexible strip, 3 ... crown, 4 ...
... winding cable, 5 ... engagement element, 6 ... hammag club bucket, 7 ... first holding device, 8 ... second holding device, 9
… Derrick cylinder, 10, 10 '…… Casing, 11…
... adjustment device, 13 ... car chassis, 14 ... platform.

Claims (2)

(57) [Claims] A crown (3) suspended and supported at the tip of a boom (1) via a flexible strip (2), and a bobbin cord (4) passing through the crown through the tip of the boom. A hammering bucket (6) interlockingly connected with a digging blade constantly biased to the engaging element (5) at the lower end of the bobbin so that the digging blade closes when the bobbin rope is tensioned; A first catching device (7) mounted on the top of the hammer grab bucket by constantly returning to a release position through which the mating member can freely pass, and a hammer grab bucket having the first catching device in the release position; The second catching device is engaged between the top portion and a second catching device (8) engageable so as to be suspended and supported on the crown by the loosening of the bobbin rope, and the second catching device is engaged with the hammer club bucket. When the hook is suspended and supported by the crown, the first holding device (7) is moved upward by the engaging element (5). And the second catching device (8) is switched to a position where the engagement can be released by loosening the bobbin rope. In a casing insertion drilling device provided with an interlocking mechanism, a boom delicate in which a crown or a hammer club bucket can be moved back and forth between a drilling position in a ground in a casing and a position above a loading platform of a truck for excavating waste. A hammer club in which a device (9) is provided, a space is formed in the boom where an upper portion of a casing (10 ') extended on an inserted casing (10) is loosely fit, and the boom is suspended and engaged with a crown. The boom tip and the clasp so that the bucket can move up and down between an upper limit position where the bucket does not interfere with the extension casing when the boom is tilted back and forth by the delivery device, and a lower limit position close to the carrier of the excavating truck. Perforating apparatus casing insert, wherein the adjusting device to increase or decrease the flexible strip member length (11) attached to the boom between the emissions. 2. An adjusting device for preventing the top of a hammer club bucket lifted so as not to interfere with the casing when the boom is tilted back and forth by the delicing device so as not to be suspended and supported by the crown by the second holding device. The perforating device for casing insertion according to claim 1, wherein a minimum value of the length of the flexible strip between the boom tip and the crown, which is increased or decreased in (11), is set.