JP2014237540A - Pipe unloading device and pipe unloading method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a pipe to be unloaded from a pipe transportation vehicle within one traffic lane occupying a road, by using general-purpose heavy equipment such as a back hoe, without use of a special self-propelled pipe transportation truck.SOLUTION: A pipe unloading device includes a base, an oscillation stand 3 that is mounted on the base in such a manner as to be oscillatable on an oscillation axis line L elongated in a horizontal direction, and a plurality of roller rows 4 that are separately arranged on the oscillation stand in a direction orthogonal to the oscillation axis line. In the roller row, a plurality of rollers 18 are rotatably supported on a support shaft that is curved in such an arc shape as to become convex downward.

Description

  The present invention relates to a pipe lowering apparatus used when a pipe loaded on a pipe transporting vehicle is lowered from the pipe transporting vehicle, and a pipe lowering method using the pipe lowering apparatus.

Conventionally, when a pipe such as a gas pipe or a water pipe loaded on a pipe carrying vehicle is lowered from the pipe carrying vehicle, a method using a mobile crane is known.
However, in the pipe unloading method using a mobile crane, when one pipe is long, for example, 12 m long and heavy like a gas pipe, the al trigger attached to the mobile crane is extended to the left and right sides. Thus, the mobile crane must be fixed to the road surface, and there is a problem that the road is temporarily occupied by two lanes.
In order to avoid such a problem of occupying two lanes on the road, Japanese Patent Application Laid-Open Publication No. 2004-228561 proposes a pipe lowering method for lowering a pipe from a pipe carrier using a special self-propelled pipe carrier.

JP 2008-30600 A

  However, in the technique described in Patent Document 1, it is essential to use a special self-propelled pipe carrier used for pipe lowering or pipe movement. In addition, there is a problem that a special self-propelled pipe carrier cart must be prepared, resulting in high costs.

  The present invention has been made in view of the above-described circumstances. Even if a general purpose heavy machine such as a backhoe is used without using a special self-propelled pipe transport carriage, the pipe transport vehicle can be used within a single road lane. It is an object of the present invention to provide a pipe lowering apparatus and a pipe lowering method capable of lowering a pipe from a pipe.

In order to solve the above problems, the present invention proposes the following means.
The pipe lowering device according to the present invention includes a base, a swinging base attached to the base so as to be swingable about a swinging axis extending in the horizontal direction, and orthogonal to the swinging axis on the swinging base. A plurality of rollers rotatably supported by a support shaft that is curved in an arc shape so as to protrude downward. Features.

The procedure for lowering the pipe from the pipe carrier vehicle on which the pipe is mounted using the pipe lowering device will be described. First, the pipe lowering device is disposed at a position spaced apart from the loading platform of the pipe carrier vehicle at a predetermined interval. From this state, for example, using a general purpose heavy machine such as a backhoe, the rear end of the pipe is drawn backward from the loading platform of the pipe carrying vehicle, and the rear end of the drawn pipe is placed on the roller row of the pipe lowering device. It is supported by a lowering device.
Next, while the pipe is supported by the pipe lowering device, the rear end of the pipe is further pulled backward by a general-purpose heavy machine so that the portion of the pipe supported by the pipe lowering device comes from the center of the pipe to the front end side of the pipe. The pipe is moved to the position, and the front end side of the pipe is lifted from the loading platform of the pipe carrier vehicle.

Next, the pipe carrier vehicle is moved forward to retract the loading platform from the lower position of the pipe.
Next, the rear end of the pipe is lifted by a general-purpose heavy machine, and the front end of the pipe is landed in the empty space after the pipe carrying vehicle is retracted. Thereafter, the rear end of the tube is further lifted to separate the tube from the tube lowering device, and then the tube lowering device is removed from the lower position of the tube.
Next, the pipe is landed over the entire length while lowering the rear end of the pipe.

According to the pipe lowering device, in the step of lowering the pipe, whether the intermediate portion of the pipe is supported by the pipe lowering device or the end of the pipe is grounded, all the weight of the pipe is added. There is no need to lift it over. For this reason, even if it uses general purpose heavy machinery, such as a backhoe, whose lifting force is weak, pipe down operation | work is possible.
Further, since the tube is supported by the roller array, the frictional force when the tube is moved in the axial direction can be reduced, and the force for moving the tube by the general-purpose heavy machine can be minimized.

In addition, since the roller row supporting the tube is swingably supported by the swing table, the supported tube is lowered so that the front end side is lowered at the same time as the rear end side is raised, or conversely, the rear end side is lowered. At the same time, it is possible to easily control the posture so that the front end side is raised. In addition, since the roller row is attached to the swing base, when changing the posture of the tube supported by the roller row (when raising one end of the tube upward and lowering the other end of the tube downward, or vice versa) When the one end side of the pipe is lowered and the one end side of the pipe is lifted upward), the posture of the tube can be changed integrally with the roller array, so that the posture of the tube can be easily changed. In addition, since the roller row is attached to a support shaft in which a plurality of rollers are curved in an arc shape, even in one roller row, a load can be distributed to each roller constituting the roller row.
Moreover, since the surface pressure applied to the coating portion on the outer surface of the tube when the tube is moved can be reduced, the coating portion on the outer surface of the tube is hardly damaged.
In addition, when there are a plurality of roller rows that support the tube, the tube can be stably supported.

  As described above, the pipe can be lowered from the pipe carrier vehicle by using a general-purpose heavy machine such as a backhoe disposed behind the same lane as the pipe carrier vehicle. In other words, the pipe can be lowered from the pipe carrier vehicle in a single road lane using a general-purpose heavy machine without using a special self-propelled pipe carrier carriage.

The roller may be disposed between a plurality of support plates fixed to the support shaft at intervals along the axial direction.
In this case, the support plate can restrict the movement of the plurality of rollers in the axial direction of the support shaft. For this reason, the pipe | tube used as the object of unloading can be supported stably.

The oscillating table may include a reinforcing plate portion below the oscillating axis, and the roller rows may be arranged on both the front and rear sides of the reinforcing plate portion as a center.
In this case, since the reinforcing plate portion is provided at the central portion along the swing axis and the roller rows on both the front and rear sides thereof are arranged, the two roller rows can be efficiently reinforced from the central side by the reinforcing plate portion. For this reason, since it can control that a roller row | line | column moves carelessly, the pipe | tube used as the object of unloading can be supported further stably.

The base may be configured to include a plurality of legs.
In this case, by appropriately adjusting the length of the leg portion, the base can be arranged at a desired height position, so that the roller of the pipe lowering device can be adjusted in accordance with the load carrier height of the pipe carrying vehicle. You can set the column height.

A pipe unloading method according to the present invention is a method for unloading a pipe loaded on a pipe transporting vehicle using the pipe unloading apparatus according to any one of claims 1 to 4, wherein From the rear end, the pipe is placed on the roller row of the pipe lowering device arranged at a distance from the rear end of the loading platform of the pipe carrying vehicle while pulling out one end of the pipe by a hoisting vehicle having a lifting mechanism. A step of supporting, and while the tube is supported by the tube lowering device, one end of the tube is further pulled out by the hoisting vehicle, and a portion of the tube supported by the roller row is more than the central portion of the tube. Moving the pipe so as to come to the other end of the pipe, and moving the other end of the pipe from the loading platform of the pipe carrying vehicle; advancing the pipe carrying vehicle from a position below the pipe; A step of evacuation and the suspended vehicle Lifting the one end of the pipe and landing the other end of the pipe in the empty space after the pipe transporting vehicle is retracted; further lifting the one end of the pipe by the hoisting vehicle; After separating from the lowering device, the step of removing the tube lowering device from the lower position of the tube and the step of lowering one end of the tube and landing the tube over the entire length are provided.
This pipe unloading method uses the above-mentioned pipe unloading device effectively to unload the pipe from the pipe transport vehicle in a single road lane using general purpose heavy equipment without using a special self-propelled pipe transport bogie. be able to.

  According to the invention which concerns on Claim 1 and Claim 5, a pipe can be lowered | hung from a pipe transport vehicle in a road occupation 1 lane using a general purpose heavy machine, without using a special self-propelled pipe transport cart. As a result, the influence on traffic can be minimized in the pipe laying work on the existing road.

    According to the invention which concerns on Claim 2, it can restrict | limit that a some roller moves to the axial direction of a support shaft with a support plate. For this reason, the pipe | tube used as the object of unloading can be supported stably.

  According to the invention of claim 3, since the reinforcing plate portion is provided in the central portion along the swing axis and the roller rows on both the front and rear sides thereof are arranged, the two roller rows are efficiently moved from the central side by the reinforcing plate portion. Since it can reinforce well and it can control that a roller row | line | column moves carelessly, the pipe | tube used as the object of unloading can be supported further stably.

    According to the invention which concerns on Claim 4, a base can be set to a desired height position by adjusting the length of a leg part suitably. Thereby, according to the loading platform height of a pipe conveyance vehicle, the height of the roller row | line | column of the said pipe lowering apparatus can be set.

It is a front view of the pipe lowering apparatus which is one Embodiment of this invention. It is a right view of the pipe lowering apparatus which is one Embodiment of this invention. It is a top view of the pipe lowering apparatus which is one Embodiment of this invention. It is a bottom view of the pipe lowering apparatus which is one Embodiment of this invention. It is a front view of the base except the leg part of the pipe lowering apparatus which is one Embodiment of this invention, and a rocking | fluctuation base. It is a right view of the base except the leg part of the pipe lowering apparatus which is one Embodiment of this invention, and a rocking | fluctuation base. It is a top view of the base and rocking | fluctuation table except the leg part of the pipe lowering apparatus which is one Embodiment of this invention. It is a right view which shows the rocking | fluctuation state of the rocking | fluctuation stand of the pipe lowering apparatus which is one Embodiment of this invention. It is the schematic which shows 1 process of the pipe lowering method which is one Embodiment of this invention. It is the schematic which shows 1 process of the pipe lowering method which is one Embodiment of this invention. It is the schematic which shows 1 process of the pipe lowering method which is one Embodiment of this invention. It is the schematic which shows 1 process of the pipe lowering method which is one Embodiment of this invention. It is the schematic which shows 1 process of the pipe lowering method which is one Embodiment of this invention. It is the schematic which shows 1 process of the pipe lowering method which is one Embodiment of this invention. It is the schematic which shows 1 process of the pipe lowering method which is one Embodiment of this invention. It is the schematic which shows 1 process of the pipe lowering method which is one Embodiment of this invention.

Hereinafter, a pipe lowering apparatus and a pipe lowering method according to an embodiment of the present invention will be described with reference to the drawings.
First, the pipe lowering device will be described. 1 is a front view of the pipe lowering device, FIG. 2 is a right side view of the pipe lowering device, FIG. 3 is a plan view of the pipe lowering device, and FIG. 4 is a bottom view of the pipe lowering device. The left side view of the pipe lowering device is the same as FIG.
The pipe lowering device 1 includes a base 2, a rocking base 3 attached to the base 2 so as to be rockable about a rocking axis L that extends in the horizontal direction, and a rocking base 3 that is connected to the rocking axis L. A plurality of (herein, two examples) roller rows 4 are provided that are spaced apart in the orthogonal direction.

  FIG. 5 is a front view of the base and the swing base without the legs of the pipe lowering device, FIG. 6 is a right side view of the base and the swing base without the legs of the pipe lowering device, and FIG. 7 is the pipe lowering. FIG. 8 is a right side view showing a swinging state of the swinging table, and FIG. 8 is a plan view of the base and the swinging table excluding the legs of the apparatus.

As shown in FIG. 5, the base 2 has a base body 6 and four legs 7 that support the base body. The base body 6 includes a rectangular bottom plate 8 and left and right upright side plates 9 and 9 attached to both left and right ends of the bottom plate 8 so as to be orthogonal to the bottom plate 8.
In this specification, the left and right are defined as the Xa direction in FIG. 1 as the left side and the Xb direction in FIG. 1 as the right side. In FIG. 3, the Ya direction is defined as the front and the Yb direction is defined as the rear.
As shown in FIG. 6, the left and right standing side plates 9 have a concave groove 9a formed at the center of the upper part, and are reinforced by two vertical ribs 10 provided on the outside.

  The oscillating base 3 includes a rectangular bottom plate 12, left and right standing side plates 13 and 13 attached to the left and right ends of the bottom plate 12 so as to be orthogonal to the bottom plate 12, and the bottom plate 12 at the center of the bottom plate 12. And a reinforcing plate portion 14 attached so as to be orthogonal to the bottom plate 12 along the longitudinal direction.

  At the center of each of the left and right standing side plates 13, 13, swing shafts 15, 15 are attached so as to protrude outward, and these swing shafts 15 are recessed grooves of the left and right standing side plates 9 of the base 2. The swing base 3 is swingable about the swing axis L that connects the left and right swing shafts 15 (see FIG. 8).

  In addition, a plurality of support plates 16 that also serve as partition portions are attached to the reinforcing plate portion 14 so as to extend radially with the center Pa of the pipe P to be unloaded. With these support plates 16, support shafts 17 constituting the roller row 4 are respectively arranged on the front and rear sides of the reinforcing plate portion 14. That is, the roller row 4 is disposed on both the front and rear sides of the reinforcing plate portion 14 as the center.

The support shaft 17 is formed in an arc shape so as to protrude downward. The center of the arc of the support shaft 17 is set at substantially the same position as the center Pa of the pipe P to be unloaded, which is supported by the roller row 4. Two rollers 18 are rotatably disposed on the support shaft 17 between the support plates 16.
Here, the case where the support shaft 17 is “curved in an arc shape” naturally includes a case where the support shaft 17 is literally curved in an arc shape, but the support shaft is a regular polygon such as a regular octagon. A pseudo-arc-shaped curved shape having a shape obtained by cutting off the upper half is also included. In this case, the roller 18 is supported by a straight portion having a regular polygonal shape.
The roller 18 is selected from a material that is highly durable and does not damage the outer surface of the pipe P to be unloaded, such as a material such as urethane or nylon.

Next, a method for lowering the pipe P loaded on the pipe transport vehicle C using the pipe lowering device 1 having the above-described configuration will be described.
9-16 is the schematic which shows each process of the pipe lowering method which is one Embodiment of this invention. In order to lower the pipe P from the pipe transporting vehicle C, first, as shown in FIG. 9, the pipe lowering device 1 is arranged at a position spaced apart from the rear end of the loading platform of the pipe transporting vehicle C to the rear. deep. Further, for example, a general purpose heavy machine B such as a backhoe is disposed behind the pipe unloading device 1, and the rear end portion of the pipe P placed on the loading platform of the pipe transport vehicle C using the general purpose heavy machine B is connected to a rope or the like. Suspend and support through the lifting tool.
Here, the front-rear direction is defined with reference to the pipe transport vehicle C, and in FIG. 9, the Ya direction is defined as the front and the Yb direction is defined as the rear.

Further, the length from the front end of the pipe P placed on the loading platform of the pipe transporting vehicle C to the rear support roller Rb on the loading platform is La, and the tube suspension position of the general-purpose heavy machine B such as a backhoe from the rear support roller Rb. When the distance from the rear support roller Rb on the loading platform of the pipe transport vehicle C to the pipe lowering device 1 is Lc,
La + Lb> 2Lc (1)
The pipe lowering device 1 is arranged at a position satisfying the expression (1), and the pipe hanging position of the general-purpose heavy machine B is determined.

Next, as shown in FIG. 10, the general purpose heavy equipment B is used to move the pipe P supported by the front support roller Ra and the rear support roller Rb on the loading platform of the pipe transport vehicle C so as to pull out backward. .
As shown in FIG. 11, when Lb> La, the rear end of the drawn pipe P is lowered, and the rear end side of the drawn pipe P is placed on and supported by the roller row of the pipe lowering device 1 (see FIG. 11). Tube support process).

  At this time, since the height H of the pipe unloading device 1 is set lower than the height h of the front support roller Ra and the rear support roller Rb on the loading platform of the pipe transport vehicle C, the front end side of the pipe P is Ascends and separates from the front support roller Ra. That is, the pipe P is supported by the rear support roller Rb and the pipe lowering device 1.

  Next, as shown in FIG. 12, with the pipe P supported by the rear support roller Rb and the pipe lowering apparatus 1, the general purpose heavy machine B pulls the pipe P further rearward and supports the pipe P to the pipe lowering apparatus 1. The pipe P is moved so that the formed part comes from the central part of the pipe P to the front side of the pipe P, and the front side of the pipe P is floated from the loading platform of the pipe carrying vehicle C (pipe moving process).

Here, when the length from the front end of the pipe P to the part supported by the pipe lowering apparatus 1 is Ld, and the length from the part supported by the pipe lowering apparatus 1 to the pipe hanging position of the general-purpose heavy machine B is Le. ,
Le> Ld (2)
The expression (2) is satisfied.

Next, as shown in FIG. 13, the pipe transport vehicle C is moved forward and retracted from a position below the pipe P to be unloaded (vehicle retracting process).
Next, as shown in FIG. 14, the rear end portion of the pipe P is lifted by the general-purpose heavy machine B, and the front end of the pipe P is landed in the empty space after the tube transporting vehicle C is retracted (pipe end portion landing step). At this time, you may arrange | position the pipe conveyance trolley E previously in the position where the front end of the pipe P lands.
Thereafter, the rear end portion of the pipe P is further lifted, and the lower surface of the pipe P is separated from the pipe lowering apparatus 1, and then the pipe lowering apparatus 1 is removed from the lower position of the pipe P (pipe lowering apparatus removing step).
Next, the pipe P is landed over the entire length of the pipe while lowering the rear end of the pipe P. At this time, as described above, when the pipe transport carriage E is arranged in advance at the position where the front end of the pipe P lands, the pipe P can be moved in the length direction and landed at an arbitrary position.

As described above, in this embodiment, in the step of lowering the pipe P, whether the intermediate portion of the pipe P is supported by the pipe lowering device 1 or the end of the pipe P is grounded is determined. There is no need to lift the entire length of the tube itself. For this reason, even if it uses general purpose heavy machinery, such as a backhoe, whose lifting force is weak, pipe down operation | work is possible.
Moreover, since the pipe P is supported by the roller 18, the frictional force when moving the pipe P in the length direction can be reduced, and for example, the force for moving the pipe P by the general-purpose heavy machine B can be minimized. .

  Further, since the roller row 4 supporting the pipe P is supported by the swing base 3, the supported pipe P is lowered so that the rear end side is lowered at the same time as the front end side is raised, or conversely, the front end side is lowered at the same time. When controlling the posture so that the rear end side is raised, it can be controlled in an easy and stable state.

Further, since the plurality of roller rows 4 are attached to the rocking table 3, the support load of the pipe P can be distributed to the roller rows 4.
Moreover, since the surface pressure applied to the coating portion on the outer surface of the tube that moves the tube P can be reduced, the coating portion on the outer surface of the tube P is hardly damaged.
Furthermore, since there are a plurality of roller rows 4 that support the pipe P, the pipe P can be stably supported.
Further, when the pipe P is lowered from the pipe carrying vehicle C or when the front end side of the pipe P is landed, the pipe lowering device 1 is disposed at an appropriate position (a position where the central portion of the pipe P is supported). It is possible to set the suspension load of the pipe applied to the heavy machine B as small as possible.

  As described above, the pipe can be lowered from the pipe carrier vehicle in one road occupancy lane using a general-purpose heavy machine without using a special self-propelled pipe carrier carriage. As a result, the influence on traffic can be minimized in the pipe laying work on the existing road.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
In this embodiment, the roller row 4 of the unloading apparatus 1 is two rows. However, the present invention is not limited to this, and only one roller row 4 or three or more roller rows 4 may be provided.
Further, in this embodiment, the base body 6 is supported by the legs 7, but the present invention is not limited to this, and the legs 7 are eliminated and the base body 6 is extended to below the lower end of the base body 6 so as to land directly. You may make it make it.
Further, in the pipe unloading method of this embodiment, when unloading the pipe P, the general-purpose heavy machine B such as a backhoe is used, but the present invention is not limited to this, and the pipe may be lowered using a crane vehicle.

DESCRIPTION OF SYMBOLS 1 Pipe lowering apparatus 2 Base 3 Oscillating base 4 Roller row 9 Standing side plate 9a Concave groove length 14 Reinforcement plate part 15 Oscillating shaft 16 Supporting plate 17 Supporting shaft 18 Roller C Tube carrier vehicle C
B General purpose heavy machinery P Tube Pa Center of tube

Claims (5)

The base,
A swinging base attached to the base so as to be swingable about a swinging axis extending in the horizontal direction;
A row of rollers spaced apart in a direction perpendicular to the swing axis on the swing base,
The said roller row | line | column is the structure with which the some roller was rotatably supported by the support shaft which curves in circular arc shape so that it may protrude below, The pipe lowering apparatus characterized by the above-mentioned.   2. The pipe lowering device according to claim 1, wherein the roller is disposed between a plurality of support plates fixed to the support shaft at intervals along the axial direction.   2. The swing table includes a reinforcing plate portion below the swing axis, and the roller rows are arranged on both front and rear sides of the reinforcing plate portion as a center. Or the pipe lowering apparatus of 2.   The pipe lowering device according to any one of claims 1 to 3, wherein the base includes a plurality of legs. A method for lowering a pipe loaded on a pipe carrying vehicle using the pipe lowering device according to any one of claims 1 to 4,
The roller of the pipe lowering device arranged at a distance from the rear end of the loading platform of the tube transporting vehicle while pulling out one end of the pipe from the rear end of the loading platform of the tube transporting vehicle by a lifting vehicle having a lifting mechanism. A tube support step for supporting the tubes on a row;
While the pipe is supported by the pipe lowering device, one end of the pipe is further pulled out by the hoisting vehicle, and the portion of the pipe supported by the roller row is on the other end side of the pipe from the central portion of the pipe A pipe moving step of moving the pipe so as to come up and floating the other end side of the pipe from the loading platform of the pipe carrying vehicle;
A vehicle retracting step of moving the tube transporting vehicle forward to retract from a position below the tube;
A pipe end landing step in which one end of the pipe is lifted by the hoisting vehicle and the other end of the pipe is landed in an empty space after the pipe transporting vehicle is retracted;
A pipe lowering device removing step of further lifting one end of the pipe by the hoisting vehicle, separating the pipe from the pipe lowering device, and then removing the pipe lowering device from a position below the pipe;
A pipe full length landing step for lowering one end of the pipe and landing the pipe over its entire length;
A pipe lowering method characterized by comprising:

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