JP2007296549A - Apparatus for straightening steel sheet pile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for straightening a steel sheet pile with which even a worker less in skill can perform a straightening work in accordance with various deformation without using other heavy machinery such as a crane and equipment as much as possible. <P>SOLUTION: This apparatus for straightening the steel sheet pile is composed of: a rack which has the cross section of an approximately portal shape with right and left gatepost parts and the ceiling part; a placing table which is integrated with the rack and on which the steel sheet pile can be placed in the longitudinal direction; a first advancing and retreating means which is provided on the ceiling part of the rack and can be pressed and pulled in the vertical direction to the steel sheet pile and two second advancing and retreating means which are provided on the gatepost parts of the rack and which can be pressed and pulled in the horizontal direction to the steel sheet pile. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a steel sheet pile straightening device mainly used for civil engineering.

  Steel sheet piles are used for civil engineering applications, for example, retaining walls, structures such as quay walls and revetments. When the steel sheet pile is placed on the ground, the ground is sheared and crushed, so that when the ground is hard, the end of the steel sheet pile receives a large reaction force. Further, even when the steel sheet pile is pulled out, if the steel sheet pile is already deformed at the time of placing, the steel sheet pile becomes difficult to pull out, and the steel sheet pile receives a large reaction force by pulling it out forcefully. Therefore, every time the steel sheet pile is used, the web portion and the flange portion are twisted, bent, crushed, the section portion crushed, and deformed.

It is determined whether or not the steel sheet pile in which such deformation has occurred can be reused based on a certain acceptance criterion.
In addition, the steel sheet pile that has been determined to be correctable is reused after correcting the problematic deformation portion by the correction device.

As shown in FIG. 6, a conventional steel sheet pile correction device A is composed of a substantially U-shaped frame and a mounting table having a gate post portion only on one side, and a hydraulic head having a circular head at the top of the frame. Equipped with equipment.
The straightening device A performs straightening by lifting a steel sheet pile in advance by a transport device such as a crane and transporting the steel sheet pile to a mounting table, and driving a hydraulic device so that a circular head is brought into contact with the deformed portion and pressed. It was.

However, the conventional steel sheet pile correction device has the following problems.
<1> Since the pressing device is provided only in the upper part of the gantry, it is necessary to turn the steel sheet pile laterally or reverse as necessary, and the efficiency of work is poor because a crane is used each time.
<2> Since the side part of the gantry is opened to carry the crane from the side, the steel sheet piles are unintentionally slipped off during the correction work or the adjustment of the steel sheet pile position. May be dangerous.
<3> Since only the correction work along the shape of the head portion of the pressing device can be performed with respect to the steel sheet pile, it is difficult to perform the correction work according to various deformations, and a high level of experience and skill is required for the operator.
<4> Since it is necessary to adjust the relative position of the steel sheet pile and the head part of the pressing device by the crane, it is necessary to repeat the moving work of the steel sheet pile by the crane and the pressing work, and the crane is also during the correction work. It is inefficient in terms of construction period and construction cost.
<5> Since the steel sheet pile is directly mounted on the mounting table, unnecessary deformation may occur due to the reaction force being applied to portions other than the deformation portion to be corrected during correction work.
<6> Since the steel sheet pile that has been largely twisted in the longitudinal direction cannot be stably placed on a horizontal placing table, the quality of the correction work is deteriorated.

  Accordingly, an object of the present invention is to provide a steel sheet pile straightening device that can perform straightening operations according to various deformations even by a less skilled worker without using other heavy machinery and equipment such as cranes as much as possible. There is to do.

Accordingly, a first invention of the present application made to achieve the above object includes a web portion located in the center, a flange portion that bends both ends in the width direction of the web portion to form an open portion, and the flange portion. A steel sheet pile straightening device that corrects the shape of a steel sheet pile having a substantially U-shaped cross section having a section formed by bending the tip outward in the width direction in a hook shape. Has a substantially gate-shaped gantry, a pedestal integrated with the gantry and capable of mounting the steel sheet pile in a longitudinal direction, and provided on a ceiling portion of the gantry, and pressed in the vertical direction against the steel sheet pile And a first advancing / retracting means capable of pulling, and two second advancing / retreating means provided on the gate post portion of the frame and capable of being pressed and pulled horizontally with respect to the steel sheet pile. , To provide a steel sheet pile correction device That.
The second invention of the present application includes a pair of upper mold and lower mold capable of press-molding the steel sheet pile, the upper mold is attached to the tip of the first advance / retreat means, and the lower mold is mounted on the mounting table. The present invention provides a steel sheet pile straightening device according to the first invention of the present application.
The third invention of the present application provides the steel sheet pile correcting device according to the second invention of the present application, wherein the upper mold is rotatable with the advance / retreat direction of the first advance / retreat means as a rotation axis. To do.
Moreover, 4th invention of this application is equipped with the conveyance means which can feed and move the said steel sheet pile to a longitudinal direction in the mounting base mentioned above, In any 1st invention thru | or 3rd invention of this application characterized by the above-mentioned. A steel sheet pile straightening device is provided.
Moreover, 5th invention of this application comprises the supporting member which can mount the web part of the said steel sheet pile facing upwards in the mounting base mentioned above, The 1st invention thru | or 4th invention of this application characterized by the above-mentioned. The correction apparatus of the steel sheet pile described in any one is provided.
The sixth invention of the present application is the steel sheet pile according to any one of the first to fifth inventions of the present application, wherein a detachable correction jig is attached to the second advance / retreat means. A correction device is provided.

The present invention can obtain at least one of the following effects by means for solving the above-described problems.
<1> By providing the second advancing / retreating means on the left and right gate pillars of the gantry, it is possible to repair the irregularities of the section part and the rising surface without turning the steel sheet pile sideways or reversing it.
<2> Since the work is performed by inserting the steel sheet piles into both legs of the gantry by forming the gantry in a gate shape, there is no risk of the steel sheet piles falling down and the safety of the operator is improved.
<3> By providing an upper die at the tip of the first advancement / retraction means and providing a lower die on the mounting table, it is possible to repair the end of the steel sheet pile, and a wide range of corrections such as width and length. And can be corrected evenly.
<4> By installing the transportation means on the mounting table or the ground, other equipment such as a crane is not used. Conveyance work such as small movement and feeding after the steel sheet pile is loaded is possible regardless of the shape of the steel sheet pile. Further, the carrying work by the crane is efficient because only the loading and unloading of the straightening device into the carrying means is sufficient.
<5> By making the leg portion of the transport means spring-type extendable and retractable, the height level of the steel sheet pile can be adjusted, and the unevenness of the rising surface can be corrected regardless of the position.
<6> By providing a correction jig at the tip of the second advancing / retreating means, it is possible to correct the flange portion by rolling it back.

  Hereinafter, embodiments of a steel sheet pile straightening device according to the present invention and details of a straightening method using the straightening device will be described with reference to the drawings.

  First, a steel sheet pile 1 to be corrected by the correction apparatus according to the present invention will be described with reference to FIG. The steel sheet pile 1 includes a web part 11 located at the center, a flange part 12 that bends both ends in the width direction of the web part 11 in the same direction to form an open part, and a front end of the flange part 12 in the width direction outside. It is a channel-shaped member having a substantially U-shaped cross section having a section portion 13 formed by being bent into a hook shape.

<1> Overall Configuration FIG. 1 is a front view showing an outline of the configuration of the correction apparatus of the present invention.
With reference to FIG. 1 of the drawings, the direction from the steel sheet pile to each gate column part is the left-right direction, the direction from the steel sheet pile to the ceiling or mounting table is the vertical direction, and the longitudinal direction of the steel sheet pile is the front-rear direction. An example will be described.

The correction device according to the present invention is a device that corrects deformation that occurs when the steel sheet pile 1 is placed, pulled out, or cut.
The straightening device is integrated with a gantry 2 and a mounting table 3 for mounting the steel sheet pile 1 in the longitudinal direction, and first advancing / retreating means 4 capable of pressing and pulling the steel sheet pile 1 in the vertical direction. And at least two second advancing / retreating means 5 capable of being pressed and pulled horizontally with respect to the steel sheet pile 1. Each component will be described below.

<2> Mount 2
The gantry 2 includes two gate pillars 21 that are spaced apart from each other by a certain distance, and a ceiling part 22 that is connected to each upper part of the gate pillar part 21, and the gate pillar part 21 and the ceiling part 22 are arranged. And form a substantially gate-shaped cross section.
Each member constituting the gantry 2 uses a member such as an H-shaped steel or a steel plate, and is placed on the ground or the floor of the lining plate, and the first and second advancing / retreating means to be described later by the weight of the apparatus main body. It is configured so that a sufficient proof strength can be obtained against the reaction force received by the pressing force.
In addition, it goes without saying that the internal space formed by the gate post portion 21, the ceiling portion 22, and the mounting table 3 to be described later has a size that allows the steel sheet pile 1 to be carried in. In addition, the steel sheet pile 1 It is desirable to provide a height that can be reversed upside down.

<3> Mounting table 3
The mounting table 3 is made of a member such as an H-shaped steel or a steel plate, and is integrated with the bottom of the gate pillar 21 by welding or the like. In addition, the mounting table is configured so as to be able to mount the steel sheet pile 1 having a certain length in the front-rear direction by being provided in the front-rear direction from between the two gate pillars 21 constituting the frame 2. It is.
The upper surface of the mounting table 3 is preferably a horizontal plane so that the pressing and pulling operations to the steel sheet pile 1 can be performed accurately.

<4> First advance / retreat means 4, second advance / retreat means 5
The first advancing / retreating means 4 is a device installed such that its tip can be moved up and down with respect to the steel sheet pile 1 placed on the placing table 3 from the ceiling portion 22 of the gantry 2.
For example, a hydraulic cylinder is used as the first advancing / retracting means 4 and the head provided at the tip of the cylinder is moved up and down by hydraulic pressure to move forward and backward in the steel sheet pile 1. is there.
The first advance / retreat means 4 may be configured by providing known rotation means such as a motor so that the head can be rotated with the advance / retreat direction as the rotation axis.

The second advancing / retreating means 5 is a device that is provided on each of the gate pillars 21 that constitute the gantry 2, and is configured such that the head can be moved forward and backward with respect to the steel sheet pile 1 that is placed.
In addition, by using a hydraulic cylinder or the like in the same manner as the first advance / retreat means 4 described above, the head provided at the tip of the cylinder moves forward and backward in the left-right direction.

  In addition, the first advance / retreat means 4 and the second advance / retreat means 5 are electrically connected to a control device (not shown) such as a controller provided in the gantry 2, and the operator operates the control device, The advance / retreat of the head may be controlled.

  The device used for the first advancing / retreating means 4 and the second advancing / retreating means 5 is not limited to a hydraulic cylinder, and the head portion can be moved up and down with respect to the steel sheet pile 1 to obtain desired performance. Any device may be used. Therefore, various conventionally known advancing and retracting mechanisms such as an electric jack and an air cylinder can be employed.

<6> Upper mold 6, lower mold 7
The upper mold 6 is a member attached to the tip of the first advance / retreat means 4, and the lower mold 7 is a member provided on the mounting table 3 to mount the steel sheet pile 1 from below.
The steel sheet pile 1 is corrected to an appropriate shape by gradually pressing the upper mold 6 close to the steel sheet pile 1 placed on the lower mold 7 by the first advance / retreat means.

The cross-sectional shapes of the upper mold 6 and the lower mold 7 are adjusted to the shape of the steel sheet pile 1 to be corrected.
Specifically, the cross-sectional shape of the upper die 6 is a substantially trapezoidal shape that is slightly smaller than the shape of the space surrounded by the web portion 11 and the flange portion 12 of the steel sheet pile 1.
Also. If the depth width of the upper die 6 is too long, the pressing force propagated from the first advance / retreat means 4 may not be efficiently propagated, and the upper die 6 main body is likely to be deformed by the pressing. There is. On the other hand, if the depth width is too short, it is necessary to move the steel sheet pile 1 many times, and the working time increases. Therefore, a depth about the width of the web portion is desirable.

Further, the cross-sectional shape of the lower mold 7 has a substantially trapezoidal concave portion that is slightly larger than the shape of the space formed outside by the web portion 11 and the flange portion 12 of the steel sheet pile 1.
The depth width of the lower mold 7 may be the same as or larger than the depth width of the upper mold 6 so that the lower mold 7 exists on the back of the contact portion between the upper mold 6 and the steel sheet pile at the time of pressing. desirable.

  In addition, the shape of the upper mold | type 6 and the lower mold | type 7 may mutually replace a shape, and is not limited to the shape of the said Example.

  A second embodiment of the steel sheet pile correcting apparatus according to the present invention will be described below. In addition, about the other Example demonstrated below, the same code | symbol is attached | subjected and demonstrated about the same component as Example 1. FIG.

  In the correction apparatus according to the present invention, the conveying means 8 may be added on the mounting table 3 or on the ground. Hereinafter, the conveying unit 8 will be described.

<1> Conveying means 8
FIG. 2 shows a schematic explanatory diagram of the conveying means 8. The transport unit 8 includes a base 84 that is stationary on the installation surface of the transport unit 8, such as a ground surface or a mounting table, a pair of fixed roller tables 83 provided on the left and right sides of the base 84, and the fixed roller table 83. A pair of movable roller bases 82 mounted on the upper side and movable up and down, a roller 81 attached to the movable roller base 82, and a stopper capable of restricting the upward movement of the movable roller 82 to a certain distance. 85.

The roller 81 is configured such that both ends in the axial direction are rotatably attached to the movable roller so that the steel sheet pile 1 placed on the roller can be conveyed.
The roller 81 can be rotated forward or backward freely by a control means such as a motor attached to the rotation shaft of the roller 81 (not shown) and a remote controller provided separately, and is rotated as desired as required. A configuration that can be used.
In addition, the roller 81 may be configured to be manually rotatable by providing a handle or the like.

The movable roller base 82 and the fixed roller 83 base are provided with an elastic member such as a spring, and the movable roller base 82 is configured to be movable relative to the fixed roller base 83 in the vertical direction. The force received by the roller 81 is transmitted to the movable roller base 82 and absorbed by the elastic member provided on the movable roller base 82 and the fixed roller base 83.
The force received by the roller 81 includes the weight of the steel sheet pile 1 placed on the roller 81 when the steel sheet pile 1 is stationary, and the steel sheet pile 1 when the first advancing / retreating means 4 moves forward and backward. Is transmitted from the first advance / retreat means 4 to the movable roller base via the roller 81.

  The stopper 85 is a U-shaped member, and fixes both ends to the base 84 while holding the movable roller base 82 from above, and restrains the upward movement of the movable roller base 82 to a certain distance. Therefore, the initial position of the movable roller base 82 can be adjusted by making the height of the stopper 85 variable.

  The conveying means 8 is electrically connected to a control device (not shown) such as a controller provided on the gantry 2, and the rotation of the roller 81 is controlled by an operator operating the control device. Good.

  Moreover, you may provide the correction apparatus of the steel sheet pile which concerns on this invention between the lower mold | type 7 and the mounting base 3 which demonstrated the tracking structure by the elastic member provided in the conveyance means 8 described in the present Example previously.

<2> Operation of Conveying Means 8 During work using the straightening device of the present invention, the roller 81 is appropriately driven to bring the steel to a position where the first advance / retreat means 4 or the second advance / retreat means 5 can come into contact with an appropriate correction location. By repeating the work of moving the sheet pile 1 in the longitudinal direction (conveying work) and the work of forming the steel sheet pile 1 by the first advance / retreat means 4 and the second advance / retreat means 5 (correction work), the entire steel sheet pile 1 is corrected. .

  In the correction device according to the present invention, a plurality of support members 9 may be installed in the longitudinal direction of the steel sheet pile 1 on the mounting table 3. The support member 9 will be described below.

<1> Support member 9
The support member 9 is a member configured to be able to contact and support the section portion 13 of the steel sheet pile 1 when performing the correction work with the web portion 11 of the steel sheet pile 1 facing upward.
The support member 9 shown in FIG. 3 is provided with a plurality of steel materials such as H-shaped steel in the longitudinal direction of the support steel sheet pile 1 so as to have a height longer than the height of the lower mold 7. The steel sheet pile 1 can be supported without contact.
Further, the support member 9 is provided with a slide mechanism or the like between the mounting table 3 so that the support interval can be varied in accordance with the correction level of each advance / retreat means, that is, the force received by the steel sheet pile 1. Also good.
As described above, when the lower mold 7 is provided on the mounting table 3, it is not necessary to remove the lower mold 7 even when the steel sheet pile 1 needs to be reversed during the correction work.

  Further, the support member 9 is not limited to this embodiment, and a follow-up structure using an elastic member provided in the transport unit 8 may be provided between the support member 9 and the mounting table 3.

A fourth embodiment of the steel sheet pile correcting device according to the present invention will be described below. In the correction device according to the present invention, a detachable steel sheet pile correction jig may be attached to the second advancing / retreating means.
When it is necessary to further increase the opening of the flange portion as shown in FIG. 4, the correction jig 51 is attached to the tip of the second advance / retreat means, and the correction jig 51 is moved backward by the second advance / retreat means. I do.
The correction jig 51 is detachably attached to the tip of the second advance / retreat means with a bolt or the like.
Various shapes are known for the correction jig, and any deformation of the steel sheet pile can be corrected by using the upper mold provided in the first advance / retreat means and the jig provided in the second advance / retreat means at the same time. Work can be done.

The schematic front view of the correction apparatus of the steel sheet pile of this invention. The schematic front view of the conveyance means which concerns on 2nd Example for this invention. The schematic side view of the supporting member which concerns on 3rd Example of this invention. Schematic front view of a correction jig according to a fourth embodiment of the present invention The schematic perspective view of a steel sheet pile. The schematic front view of the correction apparatus of the conventional steel sheet pile.

Explanation of symbols

1: Steel sheet pile 11: Web part 12: Flange part 13: Section part 2: Stand 21: Gate pillar part 22: Ceiling part 3: Mounting table 4: First advance / retreat means 5: Second advance / retreat means 51: Correction jig 6: Upper mold 7: Lower mold 8: Conveying means 81: Roller 82: Movable roller base 83: Fixed roller base 84: Base 85: Stopper 9: Support member A: Straightening device B: Crane

Claims (6)

A web portion located in the center, a flange portion that bends both ends in the width direction of the web portion to form an open portion, and a section portion that is formed by bending the tip of the flange portion outward in the width direction into a hook shape. A steel sheet pile correction device for correcting the shape of a steel sheet pile having a substantially U-shaped cross section,
A gantry whose cross section has a substantially gate shape by the left and right gate pillars and the ceiling,
A mounting table integrated with the frame and capable of mounting the steel sheet pile in the longitudinal direction;
First advancing and retracting means provided on the ceiling of the pedestal and capable of pressing and pulling in the vertical direction with respect to the steel sheet pile;
Two second advancing / retreating means provided on the gate pillar portion of the gantry and capable of being pressed and pulled horizontally with respect to the steel sheet pile,
Steel sheet pile correction device.
A pair of upper and lower molds capable of press-molding the steel sheet pile is provided, the upper mold is attached to the tip of the first advance / retreat means, and the lower mold is attached to the mounting table. The correction apparatus of the steel sheet pile of Claim 1.
The steel sheet pile correction device according to claim 2, wherein the upper mold is rotatable with the advance / retreat direction of the first advance / retreat means as a rotation axis.
The steel sheet pile correction device according to any one of claims 1 to 3, wherein the mounting table is provided with conveying means capable of feeding and moving the steel sheet pile in a longitudinal direction.
The steel sheet pile correction device according to any one of claims 1 to 4, wherein the mounting table includes a support member that can be placed with the web portion of the steel sheet pile facing upward.
The steel sheet pile correction device according to any one of claims 1 to 5, wherein a detachable correction jig is attached to the second advancing / retreating means.

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