JP2020059442A - Pipe carriage cart - Google Patents

Abstract

To provide a pipe carriage cart that can hook and lower a pipe while straddling an excavated groove with simple steps.SOLUTION: A pipe carriage cart (1) includes: a plurality of running wheels (11); an auxiliary wheel (12) grounding outside a grounding range that is a range surrounded by a plurality of grounding points related to each of the plurality of running wheels; and a rotation mechanism (14) for rotating the auxiliary wheel relative to the running wheels around an axis perpendicular to a grounding surface that is a surface including the plurality of grounding points.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pipe carrier truck that conveys pipe materials.

  Patent Documents 1 and 2 disclose a pipe carrier truck (a long rigid material carrier, a pipe unloading carrier for pipes) for carrying pipe materials and the like.

JP 2004-284543 A (published on October 14, 2004) Japanese Utility Model Publication No. 62-58258 (published on April 10, 1987)

  The pipe conveyed by the pipe conveying carriage is hung in, for example, an excavation groove. At this time, it is necessary to make the pipe carrier trolley over the excavation groove. In the pipe carrier trucks described in Patent Documents 1 and 2, in order to straddle the excavation groove, the excavation groove is straddled, or the excavation groove is covered with the lid. It is necessary to make it a state of straddling the excavation trench on the above.

  However, in the case where the pipe carrier is placed across the excavation groove at the break of the excavation groove, it is necessary to run the pipe conveyor car along the excavation groove to the position where the pipe is suspended in this state. In this case, there is a safety problem because an operator who transports the pipe by using the pipe transport carriage also needs to work while straddling the excavation groove.

  In addition, when the excavation trench is covered with the lid so as to straddle the excavation trench on the lid, it is necessary to transport the lid separately, and further it is necessary to remove the lid when suspending the pipe. It takes extra time for the operator.

  An aspect of the present invention is to realize a pipe carrier truck capable of performing a pipe hanging operation in a state of straddling an excavation groove by an easy procedure.

  In order to solve the above problems, a pipe transport vehicle according to an aspect of the present invention is a pipe transport vehicle for suspending and transporting pipes, and a plurality of traveling wheels and a plurality of traveling wheels, respectively. The auxiliary grounding portion that grounds outside the grounding range that is a range surrounded by the plurality of grounding points, and the auxiliary grounding portion that travels around the axis that is perpendicular to the grounding surface that is the surface that includes the plurality of grounding points. A rotation mechanism for rotating the wheel.

  According to the above configuration, the pipe carrier can travel with a plurality of traveling wheels. Further, the pipe carrier is provided with a rotating mechanism, and by rotating the auxiliary ground contact portion with respect to the running wheel by the rotating mechanism, the auxiliary ground contact portion is surrounded by a plurality of ground contact points for each of the plurality of running wheels. It can be moved outside the ground range. Therefore, when the pipe carrier is located in the vicinity of the excavation groove or the like, the auxiliary grounding portion can be grounded on the opposite side of the excavation groove or the like.

  Further, it is preferable that the pipe carrier according to an aspect of the present invention further includes a height changing mechanism for changing the height of the auxiliary ground contact portion with respect to the plurality of traveling wheels.

  According to the above configuration, it is possible to adjust the ground contact pressure at the auxiliary ground contact portion, or to support the pipe carrier truck at the ground contact points associated with part of the plurality of running wheels and the auxiliary ground contact portion.

  Further, the pipe carrier according to an aspect of the present invention may further include an operation member for operating the height changing mechanism, and a transmission member for transmitting an operation by the operation member to the height changing mechanism. preferable.

  According to the above configuration, the operation of the operator on the operation member can be transmitted to the height changing mechanism by the transmitting member, so that the height of the auxiliary ground contact portion can be changed from a position separated from the height changing mechanism. Therefore, the labor of the operator can be reduced.

  Moreover, in the pipe carrier according to an aspect of the present invention, it is preferable that the height changing mechanism is a jack.

  According to the above configuration, the height of the auxiliary ground contact portion can be changed by the jack.

  Further, the pipe transport vehicle according to an aspect of the present invention is a position changing mechanism that changes the position of the auxiliary ground contact portion with respect to the plurality of running wheels in a direction parallel to the ground contact surface that is a surface including the plurality of ground contact points. Is preferably further provided.

  According to the above configuration, the position of the auxiliary ground contact portion with respect to the plurality of running wheels can be appropriately changed as necessary.

  Further, in the pipe carrier according to one aspect of the present invention, it is preferable that the auxiliary ground contact portion is a wheel.

  According to the above configuration, the pipe carrier vehicle can be run with the auxiliary ground portion being grounded.

  Further, in the pipe carrier according to the aspect of the present invention, it is preferable that the wheels are drive wheels including a power source.

  According to the above configuration, when the auxiliary grounding portion is grounded, the power source included in the drive wheels can drive the pipe carrier vehicle, so that the labor of the worker is reduced.

  According to one aspect of the present invention, it is possible to realize a pipe carrier truck that can perform a pipe unloading operation in a state of straddling an excavation groove by an easy procedure.

It is a figure which shows the structure of the pipe carrier vehicle which concerns on Embodiment 1, (a) is a front view, (b) is a top view. It is a figure which shows the specific example of the height change mechanism with which the pipe conveyance vehicle which concerns on Embodiment 1 is equipped. It is a figure which shows an example of the state which the auxiliary wheel rotated by the rotating mechanism from the state shown to (b) of FIG. (A) is a figure which shows the positional relationship of a running wheel and an auxiliary wheel in the pipe carrier truck of the state shown to (b) of FIG. 1, (b) is a pipe carrier of the state shown to FIG. It is a figure which shows the positional relationship between a traveling wheel and an auxiliary wheel in a trolley | bogie. (A)-(c) is a figure for demonstrating in order about the method of straddling a digging ditch on a pipe carrier. (A) And (b) is a figure for demonstrating the method of straddling a digging groove on a pipe carrier vehicle, when an obstacle exists in the vicinity of the opposite side of a digging groove.

[Embodiment 1]
Hereinafter, an embodiment of the present invention will be described in detail.

  FIG. 1A is a front view showing the configuration of the pipe carrier 1 according to the present embodiment. FIG. 1B is a plan view showing the configuration of the pipe carrier 1. The pipe transporting truck 1 is a pipe transporting truck for hoisting and transporting the pipe 100 and hanging it down on an excavation trench or the like. As shown in FIGS. 1A and 1B, a pipe carrier 1 includes a vehicle body 10, a traveling wheel 11, an auxiliary wheel 12 (auxiliary grounding portion), a height changing mechanism 13, a rotating mechanism 14, and a position changing mechanism. 15, a handle 16, an operating member 17, a transmission member 18, and a clamp device 19.

  In each drawing, the extending direction of the pipe 100 is the x direction, the vertical direction is the z direction, and the direction perpendicular to both the x direction and the z direction is the y direction.

  The vehicle body 10 is a main body portion of the pipe carrier truck 1. In the present embodiment, the vehicle body 10 is formed by cutting and welding a square pipe in accordance with the dimensions.

  The traveling wheels 11 are wheels for traveling the pipe carrier 1. In this embodiment, the pipe carrier 1 includes four traveling wheels 11. However, the pipe carrier 1 may be provided with a plurality of traveling wheels 11 different from four. Each traveling wheel 11 is a free wheel whose direction with respect to the vehicle body 10 can be freely changed. Further, each of the traveling wheels 11 is provided with a stopper (not shown) for preventing the traveling of the pipe carrier truck.

  The auxiliary wheels 12 are grounded outside the grounding range, which is the range surrounded by the grounding points of the traveling wheels 11. The auxiliary wheel 12 is supported by the bar 12a via the height changing mechanism 13.

  Since the auxiliary wheels 12 are wheels, the pipe carrier 1 can travel with the auxiliary wheels 12 grounded. Note that the pipe carrier 1 may be provided with, for example, an outrigger as an auxiliary ground portion instead of the auxiliary wheel 12.

  The height changing mechanism 13 is a mechanism that changes the height of the auxiliary wheel 12 with respect to the traveling wheel 11. By changing the height of the auxiliary wheel 12 by the height changing mechanism 13, the ground contact pressure of the auxiliary wheel 12 can be adjusted. Further, by making the height of the auxiliary wheels 12 sufficiently lower than the height of the traveling wheels 11, some of the traveling wheels 11 are lifted up, and by the ground contact points of the other traveling wheels 11 and the auxiliary wheels 12, The pipe carrier 1 can be supported.

  FIG. 2 is a diagram showing a specific example of the height changing mechanism 13. As shown in FIG. 2, in this embodiment, the height changing mechanism 13 is a jack. For this reason, in the pipe carrier 1, the height of the auxiliary wheel 12 can be changed by the jack. The height changing mechanism 13 has an adjusting portion 13a for adjusting the height. By rotating the adjusting portion 13a around a horizontal axis, the height changing mechanism 13 expands and contracts in the vertical direction, and the height of the auxiliary wheel 12 is changed. The height changing mechanism 13 is not limited to the jack and may be, for example, an electric actuator.

  The rotating mechanism 14 is a mechanism that rotates the auxiliary wheels 12 with respect to the traveling wheels 11 about an axis that is perpendicular to the ground contact surface that is a surface including the ground contact points of each of the traveling wheels 11. In this embodiment, the rotation mechanism 14 supports the bar 12a so as to be rotatable about an axis perpendicular to the ground contact surface. Therefore, when the pipe carrier 1 is located in the vicinity of the excavation groove 200 or the like to be described later, the auxiliary wheel 12 can be grounded on the opposite side of the excavation groove 200 or the like. Further, the rotation mechanism 14 is provided with a stopper (not shown) for fixing the bar 12a in a predetermined direction.

  FIG. 3 is a diagram showing an example of a state in which the auxiliary wheel 12 is rotated by the rotation mechanism 14 from the state shown in FIG. 1 (b). FIG. 1B shows a state in which the auxiliary wheel 12 is parallel to the pipe 100. FIG. 3 shows a state in which the auxiliary wheel 12 is rotated 90 ° from the state shown in FIG. 1B, that is, a state in which the auxiliary wheel 12 is perpendicular to the pipe 100.

  In the present embodiment, as shown in FIG. 1B, the auxiliary wheel 12 is provided so as to be located only on one side of the pipe 100 in a state parallel to the pipe 100. Therefore, as shown in FIG. 3, when the auxiliary wheel 12 is rotated in the direction from the pipe 100 to the auxiliary wheel 12, the auxiliary wheel 12 and the pipe 100 do not interfere with each other.

  FIG. 4A is a diagram showing a positional relationship between the traveling wheels 11 and the auxiliary wheels 12 in the pipe carrier 1 in the state shown in FIG. 1B. FIG. 4B is a diagram showing the positional relationship between the traveling wheels 11 and the auxiliary wheels 12 in the pipe carrier 1 in the state shown in FIG. In (a) and (b) of FIG. 4, only the traveling wheels 11 and the auxiliary wheels 12 are shown as the constituent members of the pipe carrier 1. In the pipe transport vehicle 1, as shown in FIGS. 4A and 4B, the auxiliary wheels 12 are grounded outside the grounding range R which is a range surrounded by the grounding points of the traveling wheels 11. .

  The position changing mechanism 15 is a mechanism that changes the position of the auxiliary wheel 12 with respect to the traveling wheel 11 in the direction parallel to the ground contact surface. In the present embodiment, the position changing mechanism 15 is a member that slidably supports the bar 12a that supports the auxiliary wheel 12. Further, the position changing mechanism 15 is provided with a stopper (not shown) for fixing the bar 12a at a predetermined position. The position changing mechanism 15 can appropriately change the position of the auxiliary wheel 12 with respect to the traveling wheel 11 in the direction parallel to the ground contact surface, if necessary.

  The handle 16 includes: (i) traveling of the pipe carrier 1 by the traveling wheel 11, (ii) rotation of the auxiliary wheel 12 by the rotating mechanism 14, and (iii) changing of the position of the auxiliary wheel 12 by the position changing mechanism 15. It is a part to be gripped to perform operations such as. The handle 16 is connected to the bar 12a. As described above, the traveling wheels 11, the rotation mechanism 14, and the position changing mechanism 15 each have a stopper. The operator can select which of the above-described operations is to be performed by releasing only the stopper of the member corresponding to the desired operation and activating the stoppers of the other members.

  In this embodiment, as shown in FIG. 1B, the pipe carrier 1 has a handle 16 held by the right hand and a handle 16 held by the left hand separately. However, the handle 16 may be a single member that is held by both hands.

  The operation member 17 is a member for an operator to operate the height changing mechanism 13. The transmission member 18 is a member for transmitting the operation by the operation member 17 to the height changing mechanism 13. The operation member 17 is a rotary handle provided below the one handle 16. The transmission member 18 connects the operation member 17 and the adjusting portion 13 a of the height changing mechanism 13. The transmission member 18 may be, for example, round steel, but is not limited thereto.

  When the operator rotates the operation member 17, the transmission member 18 transmits the rotation to the adjusting portion 13a, and the height changing mechanism 13 expands and contracts. Therefore, the operator can change the height of the auxiliary wheel 12 by operating the operation member 17 without moving while holding the handle 16.

  The operation member 17 may be provided at another position closer to the handle 16 than the height changing mechanism 13. By transmitting the operation by the operation member 17 provided at such a position to the height changing mechanism 13 by the transmission member 18, it is possible to reduce the labor of the operator when changing the height of the auxiliary wheel 12.

  The clamp device 19 is a member that clamps the pipe 100. The clamp device 19 is suspended on a wire (not shown). By operating a winding mechanism (not shown) for winding the wire, the clamp device 19 is moved up and down to lift and lower the pipe 100. Note that the pipe carrier 1 may be provided with another known configuration capable of lifting and lowering the pipe 100 instead of the clamp device 19.

  5A to 5C are views for sequentially explaining a method of straddling the excavation groove 200 on the pipe carrier 1. Prior to the description, it is assumed that the pipe carrier 1 is run to the vicinity of the excavation groove 200 and stopped while the pipe 100 is parallel to the excavation groove 200. When the pipe carrier 1 is run, it is preferable that the auxiliary wheels 12 be parallel to the pipe 100, as shown in FIG. By setting the auxiliary wheels 12 in parallel with the pipe 100, it is possible to reduce the possibility that the auxiliary wheels 12 collide with surrounding objects when the pipe carrier 1 travels.

  When straddling the excavation groove 200 on the pipe carrier 1, the worker first rotates the auxiliary wheel 12 by the rotating mechanism 14 as shown in FIG. To Next, as shown in FIG. 5B, the operator changes the position of the auxiliary wheel 12 by the position changing mechanism 15 so that the auxiliary wheel 12 is positioned on the side opposite to the traveling wheel 11 with respect to the excavation groove 200. To do. Further, the worker lowers the height of the auxiliary wheel 12 with respect to the traveling wheel 11 by the height changing mechanism 13 to increase the ground contact pressure of the auxiliary wheel 12.

  When the operator moves the pipe carrier 1 toward the excavation groove 200 with the ground pressure of the auxiliary wheel 12 increased, the traveling wheel 11 does not fit into the excavation groove 200 and is shown in FIG. As described above, the excavation ditch 200 can be straddled on the pipe carrier 1. In this state, by operating the above-described hoisting mechanism, the pipe 100 hoisted by the clamp device 19 can be hoisted down into the excavation groove 200, as indicated by the broken line in FIG. 5C.

  In addition, in FIGS. 5B and 5C, the traveling wheels 11 are both in a grounded state. However, the worker may lift up the traveling wheels 11 on the side closer to the auxiliary wheels 12 by increasing the ground contact pressure of the auxiliary wheels 12.

  6A and 6B are for explaining a method of straddling the excavation groove 200 on the pipe carrier 1 when the obstacle 301 or 302 exists near the opposite side of the excavation groove 200. It is a figure.

  The obstacle 301 is an obstacle having a height such that the auxiliary wheel 12 cannot pass over the upper side even when the height of the auxiliary wheel 12 is raised to the upper limit. When such an obstacle 301 exists on the opposite side of the digging groove 200, the operator grounds the auxiliary wheel 12 on the digging groove 200 side of the obstacle 301. In this state, when the position of the auxiliary wheel 12 is fixed and the position of the auxiliary wheel 12 with respect to the traveling wheel 11 is changed by the position changing mechanism 15, the traveling wheel 11 moves toward the excavation groove 200 and the auxiliary wheel 12.

  As a result, as shown in FIG. 6A, in the pipe carrier 1, the traveling wheel 11 approaches the auxiliary wheel 12 and straddles the excavation groove 200. As described above, in the pipe transport vehicle 1, the position changing mechanism 15 can appropriately change the position of the auxiliary wheel 12 with respect to the traveling wheel 11.

  On the other hand, the obstacle 302 is an obstacle having a height that allows the auxiliary wheel 12 to pass through the upper side at least when the height of the auxiliary wheel 12 is raised to the upper limit. When such an obstacle 302 exists on the opposite side of the excavation groove 200, the operator raises the height of the auxiliary wheel 12 in advance so that the position of the auxiliary wheel 12 can be set to the obstacle 302. It is possible to change the position beyond the excavation groove 200. The operator moves the pipe carrier 1 toward the excavation groove 200 after the auxiliary wheel 12 is grounded at the position, so that the pipe conveyor car 1 is excavated in the excavation groove 1 as shown in FIG. 6B. 200 can be straddled.

  As described above, even if an obstacle such as a wall of a house or a curb exists near the excavation groove 200, the worker only touches the vehicle body 10 after grounding the auxiliary wheel 12 on the opposite side of the excavation groove 200. By traveling the above, the pipe carrier 1 can be made to straddle the excavation groove 200.

  In the example shown in FIG. 6B, the position of the auxiliary wheel 12 is fixed and the traveling wheel 11 approaches the auxiliary wheel 12 as in the example shown in FIG. Is shown straddling the excavation ditch 200. However, when the obstacle 302 exists on the opposite side of the excavation groove 200, after the auxiliary wheel 12 is grounded at a position beyond the obstacle 302, the pipe carrier truck 1 is excavated without fixing the auxiliary wheel 12. It may be moved toward the groove 200. In this case, similar to the example shown in FIG. 5C, the pipe carrier 1 is in a state of straddling the excavation groove 200 while the position of the auxiliary wheel 12 with respect to the traveling wheel 11 is maintained constant.

[Embodiment 2]
Another embodiment of the present invention will be described below. For convenience of description, members having the same functions as the members described in the above embodiment are designated by the same reference numerals, and the description thereof will not be repeated.

  The pipe carrier 1 described in the first embodiment is moved by the operator gripping the handle 16 and applying a force in a state where the auxiliary wheel 12 is grounded. However, in the pipe carrier truck according to the present invention, the auxiliary wheels 12 may be drive wheels provided with a power source. The power source may be, for example, an electric motor. In this case, when the auxiliary wheel 12 is grounded, the power source of the auxiliary wheel 12 can drive the pipe carrier vehicle, so that the labor of the worker is reduced.

  Further, the pipe carrier according to the present invention does not necessarily need to include the position changing mechanism 15. For example, if the auxiliary wheel 12 is sufficiently separated from the rotation shaft of the rotation mechanism 14, the rotation of the rotation mechanism 14 allows the auxiliary wheel 12 to be grounded to the opposite side of the excavation groove 200.

  However, in the pipe carrier truck that does not have the position changing mechanism 15, the operator straddles the excavation groove 200 when the obstacle 301 exists near the excavation groove 200, which has been described with reference to FIG. I can't do what I can do. Therefore, in consideration of the case where the obstacle 301 exists near the excavation groove 200, it is preferable that the pipe carrier has the position changing mechanism 15.

  Further, the pipe carrier according to the present invention does not necessarily have to include the operation member 17 and the transmission member 18. If the pipe carrier is not provided with the operation member 17 and the transmission member 18, the worker moves to the vicinity of the height changing mechanism 13 in the state shown in FIG. Should be changed. After that, by returning to the original place and running the pipe transporting truck toward the excavation groove 200, the worker can cross the excavation trench 200 on the pipe transporting carriage. However, from the viewpoint of reducing the labor of the operator, it is preferable that the pipe carrier is provided with the operation member 17 and the transmission member 18.

  Further, as described above, the auxiliary wheel 12 is provided so as to be located only on one side of the pipe 100 in a state parallel to the pipe 100. Here, the auxiliary wheel 12 may be configured to be able to change which side of the pipe 100 is located. Interference between the auxiliary wheel 12 and the pipe 100 can be avoided by changing the position of the auxiliary wheel 12 with respect to the pipe 100 according to the direction in which the operator wants to rotate the auxiliary wheel 12 by the rotation mechanism 14.

  Further, in the pipe carrier 1, the auxiliary wheels 12 may be provided on both sides of the pipe 100 in a state parallel to the pipe 100. In this case, when the auxiliary wheel 12 is rotated by the rotating mechanism 14, the height changing mechanism 13 raises the auxiliary wheel 12 to a height that does not interfere with the pipe 100 in advance, so that the auxiliary wheel 12 and the pipe 100 are separated from each other. Interference can be avoided.

  Moreover, as described above, the vehicle body 10 of the pipe carrier 1 is configured by cutting and welding a square pipe. However, the vehicle body of the pipe carrier according to the present invention may be configured by bending and welding a round pipe, for example.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Is also included in the technical scope of the present invention.

1 Pipe carrier truck 11 Running wheel 12 Auxiliary wheel (auxiliary grounding part)
13 Height Change Mechanism 14 Rotation Mechanism 15 Position Change Mechanism 17 Operation Member 18 Transmission Member 100 Tube

Claims (7)

A pipe carrier for suspending and transporting pipes,
Multiple running wheels,
An auxiliary grounding portion that grounds outside the grounding range that is a range surrounded by a plurality of grounding points related to each of the plurality of running wheels,
And a rotating mechanism for rotating the auxiliary ground contact portion with respect to the traveling wheel around an axis perpendicular to the ground contact surface that is a surface including the plurality of ground contact points.   The pipe carrier truck according to claim 1, further comprising a height changing mechanism for changing a height of the auxiliary ground contact portion with respect to the plurality of traveling wheels. An operating member for operating the height changing mechanism,
The pipe carrier according to claim 2, further comprising: a transmission member that transmits an operation performed by the operation member to the height changing mechanism.   The pipe transport vehicle according to claim 2 or 3, wherein the height changing mechanism is a jack.   The position change mechanism for changing the position of the auxiliary ground contact portion with respect to the plurality of running wheels in a direction parallel to the ground contact surface that is a surface including the plurality of ground contact points is further provided. The pipe carrier according to any one of claims.   The pipe carrier truck according to any one of claims 1 to 5, wherein the auxiliary ground contact portion is a wheel.   7. The pipe carrier according to claim 6, wherein the wheels are drive wheels provided with a power source.

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