JP2013063824A - Method and device for conveying scrap produced by thick steel plate shearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conveying method capable of easily correcting the attitude of a scrap to an appropriate state when a scrap cut off by a crop shear is conveyed in an upright position where a plate edge is made to be a lower side on a conveyance roller table.SOLUTION: In the method for conveying the scrap produced by thick steel plate shearing to a test shear for fine cutting, when the bent scrap is conveyed on a conveyance roller table on the upstream side of the test shear in an upright attitude where a plate edge is made to be a lower side, the driving of the conveyance roller table is stopped, a lifter is raised from a lower side at a position between rollers constituting the conveyance roller table with respect to the scrap in a stationary state, the scrap is turned over with a contact point between the scrap and the lifter as a fulcrum, and the scrap is set in an attitude where a surface being the inner side of the bend is made to be a lower side.

Description

  The present invention relates to a transport method and a transport device for transporting scrap generated by shearing a thick steel plate to a test shear for shredding.

  FIG. 5 shows a layout of a down cut type crop shear, a scrap transport device, and a down cut type test shear. Usually, scraps cut by a crop shear are transported to a test shear by a scrap transport device. FIG. 6 shows an outline of the test shear. A typical test shear is composed of an upper knife and a fixed lower knife having a lifting function by a DC motor, a crank mechanism, and the like, and a plate pressing cylinder (hereinafter referred to as a hold down) composed of a hydraulic cylinder. In this test shear, after putting the scrap between the upper and lower knives in the standby position where the upper knife is raised, the hold down placed just before the knife is lowered to hold down the scrap, and then the upper knife is lowered. To scrap scrap. Usually, the scrap surface is marked with a marking that specifies the cutting position. By repeating the scrap conveyance and the series of shearing operations as described above, the scrap is shredded and material inspection is performed. It is used as a sample.

  Here, when scrap scrapped off in the crop shear falls on the conveyor of the scrap transport device, the top and bottom are reversed and the marking surface becomes the back surface. It is common to provide a reversing machine as shown in FIGS.

Microfilm of Japanese Utility Model No. 47-58751 (Japanese Utility Model Publication No. 49-18277) Japanese Utility Model Publication No. 63-34506

  If the scrap cut off by the crop shear has a large warp in the longitudinal direction, the scrap falling on the conveyor may be in an upright posture with the plate edge portion down. When the scrap in such a standing posture is conveyed to the test shear, if the scrap width is large, the scrap cannot be moved between the upper and lower knives by being caught by the holddown or the upper knife. Also, even if there is no problem entering between the upper and lower knives, it will be the same as shearing a very thick material, so a shear load exceeding the test shear equipment specifications will be generated, and in the worst case Will cause damage to the test shear.

Since the reversing machines shown in Patent Documents 1 and 2 are designed on the assumption that an ideal rectangular scrap is reversed, it is difficult to reverse the scrap that stands up.
Conventionally, when the above-described scrap standing state occurs, as shown in FIG. 7, the operator operates a magnetic lifter or the like to lift the scrap and to take up the standing scrap. However, such processing is inconvenient and cumbersome, and if the processing is delayed, the operation of the main line such as the crop shear will be hindered, so the operator has to stick to the lifter's cab. There is no current situation.

  Accordingly, an object of the present invention is to easily perform the scrap scraped by the crop shear without carrying out a complicated operation by the operator when the scrap is transported in a standing posture on the transport roller table with the plate edge portion down. An object of the present invention is to provide a transport method and a transport apparatus that can correct the scrap posture to an appropriate state.

The gist of the present invention for solving the above problems is as follows.
[1] A transport method for transporting scrap generated by shearing a thick steel plate to a test shear for shredding, where the scrap that has warped the plate edge portion on the transport roller table upstream of the test shear. When transported in a lowered standing posture, the drive of the transport roller table is stopped, and the lifter is lifted from below at a position between the rollers constituting the transport roller table for the stationary scrap. Lifting the scrap with a lifter, tumbling the scrap with the contact part of the scrap and the lifter as a fulcrum, and placing the scrap in a posture in which the surface inside the warp is down, Transport method.

[2] In the transport method of [1] above, when the scrap length is L, in the longitudinal direction of the scrap, a lifter is brought into contact with a scrap portion within 0.15 L on both sides from the center position. A method for conveying scrap generated by thick steel plate shearing, wherein the scrap is lifted.
[3] In the transport method of [1] or [2] above, lifters are arranged at a plurality of locations in the longitudinal direction of the transport roller table, and the position of the scrap that is stationary on the transport roller table is detected by the position detection means, A method for conveying scrap generated by thick steel plate shearing, characterized in that a center position in the longitudinal direction of the scrap is obtained based on this position detection, and a lifter closest to the central position in the longitudinal direction of the scrap is raised with respect to the scrap.
[4] A transport device for transporting scrap generated by shearing a thick steel plate to a test shear for shredding, wherein the upper end of the transport roller table on the upstream side of the test shear has an upper end when it is raised. An apparatus for transporting scrap generated by thick steel plate shearing, characterized in that a lifter that can traverse a pass line and lift the scrap on a transport roller table can be moved up and down.

[5] In the transport apparatus according to [4] above, a position detector that arranges lifters at a plurality of locations in the longitudinal direction of the transport roller table and detects the position of the scrap that is stationary on the transport roller table, and the position detector Based on the detected scrap position, the center position in the longitudinal direction of the scrap is calculated, and a control means for raising the lifter closest to the longitudinal center position of the scrap with respect to the scrap is generated. Scrap conveying device.
[6] In the transport device according to [4] or [5], the lifter is configured by a bar-like or plate-like member along the width direction of the transport roller table, and can be moved up and down by being held by an actuator. A device for conveying scrap generated by shearing thick steel plates.

  According to the present invention, by simply raising the lifter and lifting the scrap against the scrap that is stationary on the transport roller table, the scrap in the standing posture with the plate edge portion down is overturned, and the scrap posture can be easily changed. It can be restored to an appropriate state. For this reason, it is not necessary to perform complicated operations by an operator as in the prior art, and scrap processing is not delayed, so that the productivity of shear lines can be improved. In addition, even in the case of a material that tends to warp scrap, stable scrap processing can be performed.

Explanatory drawing which shows an example of the implementation condition of this invention in steps Plan view showing the position of the center of gravity of the scrap in the standing posture with the plate edge part down and the fulcrum when lifted by the lifter Explanatory drawing which shows the other example of the implementation condition of this invention in steps Explanatory drawing which shows the behavior of a scrap when the contact position of the lifter with respect to the scrap is too biased toward the scrap edge in the present invention method Explanatory drawing showing the layout of the down-cut crop shear, scrap conveyor and test shear Explanatory drawing showing the outline of the test shear Explanatory drawing which shows the elimination method by the prior art when scrap becomes the standing posture with the plate edge part down

FIGS. 1A to 1D show an example of the implementation status of the present invention step by step.
In the figure, reference numeral 1 denotes a transport roller table disposed on the upstream side of the test shear, which transports scrap generated by shearing of a thick steel plate by a crop shear to a test shear for shredding. A lifter 2 is disposed below the rollers 10 constituting the transport roller table 1 so as to be lifted and lowered. When the lifter 2 is lifted, the upper end passes the pass line (conveying roller table surface position) and can lift the scrap on the conveying roller table 1. In the present embodiment, the lifter 2 is composed of a rod-like or plate-like member along the width direction of the conveying roller table, and can be moved up and down by being held by the actuator 3. There is no particular limitation on the type of the actuator 3, and for example, an air cylinder, a hydraulic cylinder, a screw jack, or the like may be used. The lifter 2 can be provided at a plurality of locations in the longitudinal direction of the transport roller table.

Since the lifter 2 lifts the scrap S from below and makes it fall over using the shift of the center of gravity position of the scrap S as will be described later, the lifter 2 includes a case where the lifter 2 is composed of a rod-like or plate-like member. The thickness of the upper end of the lifter contacting (contacting) S (thickness in the scrap conveyance direction) is preferably not so thick.
In a general conveyance roller table, the space between adjacent rolls is about 40 mm. When the lifter is moved up and down between adjacent rollers of the transport roller table as in the present invention, it is preferable to secure a clearance of 10 mm or more on both sides of the lifter to avoid interference between the lifter and the roll. Although the thickness is 20 mm or less, if the lifter thickness is 20 mm or less, the function of overturning the scrap in the standing posture with the plate edge portion down is not hindered. On the other hand, when assuming a scrap of the largest class to be transported, for example, a scrap having a thickness of 50 mm, a width of 350 mm, a length of 4500 mm, and a mass of about 600 kgf, the wear resistance of the contact portion between the scrap and the lifter is taken into consideration. In order to make the contact surface pressure 100 kgf / cm ² or less, the thickness of the lifter is preferably about 12 mm or more. Therefore, the thickness of the lifter is preferably about 12 to 20 mm.

Hereinafter, the method of the present invention will be described with reference to FIG. In the normal state, the lifter 2 is in a lowered state, and therefore, the upper end thereof is located below the pass line (conveying roller table surface position).
When the scrap S that has warped has been conveyed in a standing posture with the plate edge portion e down on the conveying roller table 1 as shown in FIG. 1A, the driving of the conveying roller table 1 is stopped. Then, the scrap S is stopped at a position where the center position in the longitudinal direction of the scrap S is in the vicinity immediately above the lifter 2.

  With respect to the scrap S in a stationary state, the lifter 2 is raised from below as shown in FIG. 1 (b), and the scrap S is lifted by the lifter 2. Here, as shown in FIG. 2, the scrap S in the standing posture with the plate edge portion e down has a center of gravity shifted in a direction perpendicular to the conveying direction due to the warpage. For this reason, when the scrap S is lifted by the lifter 2, as shown in FIG. 1 (c), the scrap S falls on the contact portion (contact portion) with the lifter 2 as a fulcrum, and the inside of the warp on the conveying roller table 1. It becomes the posture where the face becomes down. That is, the posture of the scrap S is corrected to an appropriate state. Thereafter, the lifter 2 is lowered, the transport roller table 1 is driven again, and the transport of the scrap S is continued.

  When the lifter 2 is raised with respect to the scrap S in a stationary state and the scrap S is lifted up, the scrap S can be tumbled well using the shift of the center of gravity as shown in FIG. It is preferable to lift the scrap S by bringing the lifter 2 into contact with the scrap S at the position. Specifically, when the scrap length is L, in the scrap longitudinal direction, the lifter is brought into contact with a portion of the scrap S in a range r within 0.15 L on both sides from the center position, more preferably within 0.10 L, It is desirable to lift the scrap S. As shown in FIG. 4A, when the contact position of the lifter 2 with respect to the scrap S is out of the range r, the balance in the scrap longitudinal direction with the contact portion between the scrap S and the lifter 2 as a fulcrum may be lost. In this case, as shown in FIG. 4 (b), the scrap end far from the lifter 2 is inclined in the direction of falling from the lifter 2, and the contact point between the scrap end and the roll 10 prevents the scrap S from falling over. It may act as a fulcrum and the desired scrap overturning behavior may not be obtained. FIG. 4A shows the scrap length L and a range r within 0.15 L on both sides from the center position in the longitudinal direction of the scrap.

Hereinafter, more specific and preferred embodiments of the method and apparatus of the present invention will be described.
In this embodiment, the lifters 2 are arranged at a plurality of locations in the longitudinal direction of the transport roller table 1, the position of the scrap S stationary on the transport roller table 1 is detected by the position detection means, and the scrap is detected based on this position detection. The longitudinal center position is obtained, the lifter closest to the scrap longitudinal center position is raised with respect to the scrap S, the scrap S is lifted as shown in FIG.
FIGS. 3A to 3D show an example of the implementation status step by step.
In this embodiment, lifters 2x, 2y,... Are arranged at a plurality of locations in the longitudinal direction of the transport roller table 1. Reference numeral 4 denotes position detection means for detecting the position of the scrap S stationary on the transport roller table 1, for example, a camera for capturing the scrap S (for example, capturing the scrap S from the substantially horizontal direction toward the transport roller table width). Camera) and an image processing apparatus.

  As shown in FIG. 3 (a), the scrap S that has warped is in an upright posture with the plate edge portion e down on the conveying roller table 1 (in the following description, it may be simply referred to as “standing posture”). When being conveyed, the driving of the conveying roller table 1 is stopped, and the scrap S is stopped at an arbitrary position in the middle of the scrap S passing over the lifter. The position detection means 4 detects the position of the stopped scrap S by, for example, imaging with a camera and image processing with an image processing device. A control means (not shown) (for example, a control device having a calculation function) calculates the scrap longitudinal direction center position based on the position of the scrap S detected by the position detection means 4, and is closest to the scrap longitudinal direction center position. Lifter 2y is raised relative to scrap S. The lifter 2y that has moved up causes the scrap S to fall down through a series of operations as shown in FIGS. Note that the control means may determine whether or not the scrap S is in a standing posture based on the image processing information of the scrap S. In this case, the lifter 2 is controlled based on the calculation of the center position in the longitudinal direction of the scrap only when it is determined that the scrap S is in the standing posture.

  When the position detection unit 4 includes a camera and an image processing device, the position detection unit 4 detects the position of the scrap S, the control unit determines the standing position of the scrap S, the calculation of the scrap longitudinal center position, and the control of the lifter. For example, it is performed as follows. In addition, the camera which comprises the position detection means 4 images the scrap S from a substantially horizontal direction toward the conveyance roller table width. As shown in FIG. 3 (a), the scrap S is imaged by a camera (the two-dot chain line indicates the imaging range in the figure), and the video obtained by this camera is input to the image processing apparatus, and the scrap by binarization processing Detect the position of the upper and lower edges. Usually, the width of the scrap is sufficiently large with respect to the thickness. For example, the width of scrap having a thickness of 50 mm is generally in the range of about 100 to 350 mm. Therefore, if the detected distance between the upper edge and the lower edge of the scrap is sufficiently large with respect to the thickness of the scrap that is known in advance, the scrap is in the standing posture with the plate edge portion down. It will be. Therefore, the control means determines whether or not the scrap is in a standing posture by comparing the detected distance between the upper and lower edges with the thickness of the scrap given in advance, and both end positions in the scrap longitudinal direction. The scrap longitudinal center position is calculated from When it is determined that the scrap S is in the standing posture, the control means raises the lifter 2y closest to the obtained scrap longitudinal center position with respect to the scrap S.

  As shown in FIG. 3, lifters 2x and 2y are arranged at two locations in the longitudinal direction of the transport roller table 1 (for example, two locations separated by three rolls). The scrap that is assumed to have the maximum dimensions and warpage had a plate thickness of 50 mm, a width of 350 mm, a length of 4000 mm, an upward warp curvature radius of 12000 mm (lifted on both sides of 213 mm), and a mass of 630 kg. The maximum thrust of the air cylinder) was about 650 kg. The lifters 2x and 2y have a simple structure consisting of a single square bar having a width dimension that fits between the roll pitches of the transport roller table 1 and approximately the same length as the roller table width, and this is used as the actuator (air cylinder). Held. The lift range at the upper end of the lifter is preferably the minimum stroke range that does not impede normal scrap conveyance and has sufficient functions for falling scrap. From this point of view, the lift and lowering of the lifter upper end The positions were 50 mm below and 150 mm above with reference to the pass line position of the transport roller table.

  The scrap S that has been transported on the transport roller table 1 was stopped at an arbitrary position in the middle of passing over the lifters 2x and 2y. The video obtained from the camera constituting the position detection means 4 was input to the image processing apparatus, and the position of the upper and lower edges of the scrap S was detected by binarization processing. As described above, if the detected distance between the upper and lower edges is sufficiently large with respect to the scrap thickness, the scrap will be in an upright posture with the plate edge part down. The distance between the upper and lower edges is compared with a predetermined scrap thickness to determine whether or not the scrap S is in a standing posture, and the scrap longitudinal center position is determined from both end positions in the scrap longitudinal direction. Calculated. Since it is determined by the control means that the scrap S is in the standing posture, the lifter 2y closer to the longitudinal center position of the scrap is lifted with respect to the scrap S, and a series as shown in FIGS. The scrap S was overturned and its posture was optimized.

DESCRIPTION OF SYMBOLS 1 Conveyance roller table 2, 2x, 2y Lifter 3 Actuator 4 Position detection means 10 Roller S Scrap e Board edge part

Claims (6)

A conveying method for conveying scrap generated by shearing a thick steel plate to a test shear for shredding,
When the warped scrap is transported in an upright position with the plate edge down on the transport roller table on the upstream side of the test shear, the transport roller table stops driving and The lifter is lifted from below at the position between the rollers constituting the conveying roller table, the scrap is lifted by the lifter, the scrap is turned over with the contact portion between the scrap and the lifter as a fulcrum, and the scrap becomes inside the warp. A method for conveying scrap generated by shearing a thick steel plate, wherein the surface is in a downward posture.   When the scrap length is L, the lifter is brought into contact with a scrap portion within a range of 0.15L on both sides from the center position in the longitudinal direction of the scrap, and the scrap is lifted by the lifter. A method for conveying scrap generated by shearing thick steel plates as described.   Lifters are arranged at a plurality of locations in the longitudinal direction of the transport roller table, and the position detection means detects the position of the scrap that is stationary on the transport roller table. Based on this position detection, the center position in the longitudinal direction of the scrap is obtained. The method for conveying scrap generated by shearing thick steel plates according to claim 1 or 2, wherein the lifter closest to the longitudinal center position is raised with respect to the scrap. A conveying device for conveying scrap generated by shearing a thick steel plate to a test shear for shredding,
In the position between the rollers constituting the transport roller table on the upstream side of the test shear, the upper end passes through the pass line when ascending, and a lifter capable of lifting the scrap on the transport roller table is provided so as to be lifted and lowered A device for conveying scrap generated by shearing thick steel plates. Place lifters at multiple locations in the longitudinal direction of the transport roller table,
A position detection unit that detects the position of the scrap that is stationary on the transport roller table, and calculates a scrap longitudinal center position based on the scrap position detected by the position detection unit, and is closest to the scrap longitudinal center position 5. The apparatus for conveying scrap generated by shearing thick steel plates according to claim 4, further comprising control means for raising the lifter relative to the scrap.   The lifter is composed of a bar-like or plate-like member along the width direction of the transport roller table, and can be moved up and down by being held by an actuator. Scrap conveying device.

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