JP3774157B2 - Medium push jack handling device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a handling device for an intermediate jack used for constructing a pipeline in the ground by a propulsion method.
[0002]
[Prior art]
When constructing a pipeline in the ground by the propulsion method, if the propulsion distance is longer than a certain length or there is a curved part, it is necessary to make a midway along the propulsion pipeline to make up for the lack of propulsive force on the main push side. An intermediate pusher tube is interposed between the intermediate pusher tube and an intermediate pusher jack is attached to the intermediate pusher tube.
[0003]
In the case of a standard diameter, a maximum of 14 middle push jacks are used per one middle push pipe. Usually, the middle push jack is attached to the inner peripheral surface of the middle push pipe on the ground and propelled as needed. The intermediate pusher tube is interposed between the propulsion tube and the propulsion tube at various positions. The middle pusher tube and the middle pusher jack attached to the middle pusher tube are normally embedded in a mortar filled on the inner peripheral surface of the middle pusher tube without being removed even after the construction of the pipeline is completed.
[0004]
However, the above-mentioned middle push pipe and the middle push jack attached thereto are often not used due to various circumstances at the construction site, and the influence on the construction cost becomes a problem.
[0005]
As a countermeasure against this, when it is necessary to carry out propulsion with an intermediate push pipe provided with only its attachment section in place, without attaching the intermediate push jack, and when it becomes necessary to actually push the middle push jack, There is a method of reducing the cost of construction by carrying in, attaching the jack jack by manual operation of an operator using a simple tool, and removing the jack after completion of the construction.
[0006]
[Problems to be solved by the invention]
However, the work of attaching an intermediate push jack of less than 100 kilograms to the inner wall of the intermediate push pipe inside the narrow propulsion pipe, particularly the work of attaching it to the ceiling, is a dangerous and difficult work. The same is true for the removal work.
[0007]
Then, this invention makes it a subject to provide the intermediate push jack handling apparatus which can perform the attachment operation | work and removal operation | work of the said intermediate push jack easily and safely.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problems, an intermediate push jack handling device according to the present invention includes an extendable boom, a jack grip provided at a tip portion thereof, a rotation support portion of the extendable boom, and a swing of the extendable boom. The rotation support part is fixed to the lower position of the inner wall of the intermediate push pipe, and the rear end of the telescopic boom is connected to the rotation support part so as to be swingable by a hinge pin parallel to the center line direction of the intermediate push pipe. Thus, the intermediate push jack grasped by the jack grasping portion is lifted to a predetermined position on the inner wall of the intermediate push pipe by expansion and contraction of the telescopic boom and driving of the swinging device.
[0009]
If the said apparatus is used, the intermediate push jack hold | gripped with the jack holding | grip part of the front-end | tip part of an expansion-contraction boom can be easily lifted to the height of a center push pipe by the action | operation of an expansion-contraction apparatus and a rocking | swiveling device.
[0010]
A configuration in which a jack temporary table is installed at a low position on the inner wall surface of the intermediate push tube can be employed. Providing such a temporary placement stand has the convenience of temporarily placing the intermediate push jack on it.
[0011]
The swing device includes: a wire attached to a part of the telescopic boom; a pulley attached at a high position on the inner wall surface of the intermediate push tube; and a winding / removal device attached at an appropriate position on the inner wall surface of the intermediate push tube. Thus, the wire can be taken up by the winding device through the pulley.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2. First, the intermediate push tube 1 will be described. The intermediate push tube 1 is composed of a combination of an intermediate push outer tube 2 and an intermediate push inner tube 3. The intermediate push outer tube 2 is disposed at the front portion in the propulsion direction (see arrow A), and the intermediate push inner tube 3 is fitted to the inner diameter surface from the rear portion of the intermediate push outer tube 2.
[0013]
The intermediately pressed outer tube 2 is composed of a steel tube-made metal tube portion 4 and a concrete tube portion 5 formed concentrically and at the same outer diameter at the front end thereof. An inner collar 6 is provided at a position near the front end of the inner diameter surface of the metal tube portion 4, and the rear end portion of the concrete tube portion 5 is integrated with the outer surface of the inner collar 6 and the inner diameter surface of the metal tube portion 4. Is done.
[0014]
A contact wheel 8 is detachably attached to the rear surface of the inner collar 6 by a bolt 7. The bolt 7 is screwed into a nut 9 embedded in the concrete pipe portion 5. The abutment ring 8 is constituted by a channel-shaped steel ring, and a large number of ribs 11 are provided on the inner side over the entire circumference.
[0015]
In addition, the front-end | tip part of the said concrete pipe part 5 is inserted in the rear-end part of the front propulsion pipe 10. FIG.
[0016]
On the other hand, as shown in FIG. 1, the inner press-in inner tube 3 is formed by joining and integrating an L-shaped insertion ring 13 with a rear end portion of a steel tube-made metal tube portion 12. The tip of the rear propulsion pipe 14 is inserted into the insertion ring 13. Further, an inner collar 15 is provided on the inner surface of the metal tube portion 12 so as to face the insertion ring 13, and a plurality of reinforcing ribs 16 are provided between the inner collar 15 and the insertion ring 13.
[0017]
Further, an inward leading end collar 17 is provided at the leading end of the metal tube portion 12, and 14 reinforcing ribs 20 have a length between the inner collar 15 and the leading end collar 17 at equal intervals in the circumferential direction. (See FIG. 2). Between each of these reinforcing ribs 20 is an attachment portion 19 of the intermediate push jack 18, and a positioning recess 21 at the distal end portion of the intermediate push jack 18 is provided on the inner peripheral edge of the distal end collar 17 for each attachment portion 19.
[0018]
The intermediate push jack handling device 22 is attached to the inside of the intermediate push tube 1 described above. As shown in FIG. 2, the telescopic boom 23 constituting the intermediate push jack handling device 22 includes an automatic telescopic arm 25 in a rectangular tubular casing 24 and a manual telescopic arm 26 in the automatic telescopic arm 25 in this order. It is what was stored in. The automatic telescopic arm 25 is connected via a bracket 29 to a piston rod 28 of a hydraulic cylinder 27 attached to the outside of the casing 24. The manual telescopic arm 26 is positioned by passing a pin 31, which is removably inserted into the automatic telescopic arm 25 through the bracket 29, through a predetermined pin hole 26 a provided in the manual telescopic arm 26. A jack grip 32 is provided at the tip of the manual extendable arm 26.
[0019]
The jack grip 32 is formed by a U-shaped frame member that is opened to receive the body of the intermediate push jack 18, and a pair of upper and lower grip bolts 33, 33 are provided on the inner side of the opening. It is screwed so that it may protrude.
[0020]
A rear end portion of the casing 24 of the telescopic boom 23 is swingably connected to a rotation support portion 35 via a hinge pin 34 parallel to the center line direction of the intermediate pusher tube 1. The rotation support portion 35 is constituted by a member fixed by a bolt 36 at a relatively low position (in the illustrated case, one position lower than the intermediate height reinforcing rib 20) of the reinforcing ribs 20. .
[0021]
The swinging device 37 for swinging the telescopic boom 23 around the hinge pin 34 includes a bracket 38 fixed to the upper end of the casing 24, a wire 39 having one end connected to the bracket 38, A pulley attached to a relatively high position of the reinforcing ribs 20 of the intermediate pusher tube 1 (in the illustrated case, one position shifted from the top reinforcing rib 20 toward the supporting portion 35) via a support fitting 41. 42 and a winding device 44 attached to the reinforcing rib 20 in the vicinity of the rotation support portion 35 via a support fitting 43. The wire 39 is hung on a pulley 42 and wound on a winding device 44.
[0022]
On the inner peripheral surface of the intermediate pusher tube 1, a pair of left and right jack temporary holders 45 and 45 (see FIG. 1) are fixed to the reinforcing rib 20 facing the support portion 35 at substantially the same height with bolts 46.
[0023]
The intermediate push jack handling device 22 of the embodiment is as described above. When carrying out the propulsion method, the front push pipe 10 and the rear push pipe are arranged at predetermined intervals with the middle push pipe 1 to which the middle push jack 18 is not attached. 14 and propulsion is performed. When the need for intermediate pressing occurs during the propulsion, the components of the jack handling device 22 are carried into the portion of the intermediate pressing tube 1 where the necessity has occurred and assembled.
[0024]
The assembly includes fixing the support portion 35, attaching the pulley 42 and the take-up device 44, fixing the jack temporary table 45, etc., and then connecting the telescopic boom 23 to the support portion 35, and further connecting the wire 39. Run through. In addition, preparation for supplying hydraulic pressure to the hydraulic cylinder 27 is performed.
[0025]
After completing such preparatory work, the loaded intermediate pushing jack 18 is temporarily placed on the temporary jacking table 45, the manual telescopic arm 26 of the telescopic boom 23 is extended to a predetermined length by the pin 31, and the intermediate pushing jack 18 is jacked. A gripping bolt 33 is screwed into the opening of the gripping portion 32. As a result, the intermediate push jack 18 is gripped.
[0026]
Next, when the winding device 44 is manually driven to wind the wire 39 by a predetermined amount, the telescopic boom 23 rises by a predetermined angle. Therefore, when the automatic telescopic arm 25 that has driven the hydraulic cylinder 27 is extended, the jack gripping portion 32 extends to the inner peripheral wall of the intermediate pusher tube 1, and its distal end is fitted into the positioning recess 21 of the mounting portion 19 (see FIG. 2 dash-dot line). The operator wraps the fastening band 47 around the two body portions of the intermediate push jack 18 which is lifted and positioned in this state, and is fixed to the inner wall surface of the intermediate push tube 1 with the bolts 48. Thereafter, the same operation is repeated to attach the intermediate push jack 18 to the top.
[0027]
Next, the jack handling device 22 is changed to a symmetrical position, and the intermediate push jack 18 is attached to each attachment portion 19 on the opposite inner wall surface by the same operation as described above.
[0028]
Since the intermediate push jack 18 does not need to be lifted at a position lower than the telescopic boom 23, it is directly attached to the predetermined attachment portion 19.
[0029]
Propulsion is continued without removing the intermediate push jack handling device 22, and the intermediate push jack 18 is removed using the device 22 after completion of the propulsion. The removal operation is performed in the reverse order of the above-described attachment operation. After the removal operation is completed, the jack handling device 22 is also removed.
[0030]
【The invention's effect】
As described above, according to the present invention, in the work of attaching and removing the intermediate push jack to the inner peripheral surface of the intermediate push pipe, the telescopic boom having the jack gripping portion is appropriately swung and extended to lift the intermediate push jack to a high place. Therefore, the labor of the operator can be remarkably reduced, and workability and safety can be improved.
[Brief description of the drawings]
FIG. 1 is a sectional view of an embodiment. FIG. 2 is a sectional view taken along line II-II in FIG.
DESCRIPTION OF SYMBOLS 1 Middle push pipe 2 Middle push outer pipe 3 Middle push inner pipe 4 Metal pipe part 5 Concrete pipe part 6 Inner collar 7 Bolt 8 Bearing ring 9 Nut 10 Propulsion pipe 11 Rib 12 Metal pipe part 13 Feeding ring 14 Propulsion pipe 15 Inner collar 16 Auxiliary rib 17 End collar 18 Middle push jack 19 Mounting portion 20 Reinforcement rib 21 Positioning recess 22 Middle push jack handling device 23 Telescopic boom 24 Casing 25 Automatic telescopic arm 26 Manual telescopic arm 26a Pin hole 27 Hydraulic cylinder 28 Piston rod 29 Bracket 31 Pin 32 Jack gripping portion 33 Grasping bolt 34 Hinge pin 35 Rotation support portion 36 Bolt 37 Oscillating device 38 Bracket 39 Wire 41 Support bracket 42 Pulley 43 Support bracket 44 Winding device 45 Jack temporary holder 46 Bolt 47 Tightening band 48 Bolt

Claims (3)

The telescopic boom is composed of a telescopic boom, a jack grip provided at the tip of the telescopic boom, a rotational support unit of the telescopic boom, and a swinging device for the telescopic boom, and the rotational support unit is fixed to a low position on the inner wall of the intermediate push tube. The rear end of the telescopic boom is pivotally connected to the rotation support portion by a hinge pin parallel to the center line direction of the middle push tube, and the middle push jack gripped by the jack grip portion is extended and retracted from the telescopic boom. A middle push jack handling device configured to lift the middle push jack to a predetermined position on the inner wall of the middle push pipe by driving a swinging device. The intermediate push jack handling device according to claim 1, wherein a temporary jack stand is installed at a low position on the inner wall surface of the intermediate push tube. The swing device comprises a wire attached to a part of the telescopic boom, a pulley attached at a high position on the inner wall surface of the intermediate push tube, and a winding / unloading device attached at an appropriate position on the inner wall surface of the intermediate push tube, The intermediate push jack handling device according to claim 1 or 2, wherein the wire is wound up by the winding device through the pulley.

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