JP6402729B2 - Scrap collection equipment - Google Patents

Description

  The present invention is a collection box for scrap generated by cutting an end of a metal strip with a shear (cutting device) provided in facilities such as a metal processing industry, steel, a skin pass line, a recoil line, and a cold rolling line. It relates to the technology to collect.

As described in Patent Document 1, scrap (cut pieces) generated by cutting the end of a metal strip with a shear slides down on a chute that is slanted downward and falls freely from the lower part of the chute. It is collected by this.
Here, in patent document 1, the case where a scrap is dropped and collect | recovered on the conveyor for conveyance arrange | positioned under the chute | shoot lower part is illustrated. However, when the processing equipment for processing the recovered scrap is far, generally, the scrap that has slipped down on the chute at once is recovered by dropping into a recovery box provided below the lower portion of the chute.

Here, the scrap collected in the collection box has various cutting lengths (cutting widths). For example, in a cold rolling line, although it depends on the size of the collection box, the cutting length is 1 cm to 120 cm, for example. The scraps are collected by being sequentially put into the collection box in a mixed state.
When the current collection box becomes full in volume, it is replaced with another empty collection box using an overhead crane or the like.
However, in an equipment configuration with only one collection box, it is necessary to stop the equipment every time the collection box is replaced. Therefore, it is important to efficiently put scrap into the collection box and reduce the number of exchanges. . Even when two or more recovery boxes are replaced and used, it is desirable to reduce the number of recovery box replacement operations and recovery box transfer operations.

However, short scraps are long and thin, and when they fall onto the chute or slide down the chute, their orientation changes in various ways and fall into the collection box in a random posture such as an oblique posture or a vertical posture. For example, when a short scrap rotates 90 degrees, it may fall in a state where the longitudinal direction is the falling direction, and may be inverted in the collection box. In this case, if the next scrap falls and overlaps on top, it is easy to create a useless space below, and the collection box becomes full immediately. In particular, when long scraps and the above short scraps are mixed, only the scrap volume is increased, and the collection box tends to be full.
In addition, since the scraps, such as collected steel, are melted and used, it is not necessary to classify and collect the scraps according to the length from the viewpoint of reuse.

JP2012-111002A

  The present invention has been made paying attention to the above points, and an object thereof is to improve the efficiency of collecting scrap into the collection box.

  In order to solve the problem, a scrap collection facility according to an aspect of the present invention is a device for collecting scrap generated by cutting an end of a metal strip, the chute having an inclined surface on which the scrap slides down, A collection box that opens upward and can accommodate scrap dropped from the lower part of the chute, and a contact surface that extends along the width direction of the inclined surface on the lower end side of the chute, A stopper disposed at a position where the surface can come into contact with scrap scraped down along the inclined surface, a contact detection unit for detecting contact of the scrap with the contact surface, and the contact And a retreat processing unit that retreats the stopper to a retreat position that does not come into contact with the scrap after a preset time has elapsed when the detection unit detects the contact of the scrap. And wherein the Rukoto.

According to the present invention, the scrap that has been slid down by the stopper is aligned with the end face, and then the scrap is dropped into the collection box. As a result, it becomes easy to be accommodated in the collection box in a state where the scraps are aligned.
In particular, short scraps with a small cutting width are dropped into the collection box by the stopper in a state where the long side is along the contact surface of the scrap, that is, the long side is along the width direction of the inclined surface. As a result, it is possible to greatly reduce the short scrap coming into the collection box in an inverted state.

  From the above, according to the present invention, it is possible to improve the efficiency of collecting scrap into the collection box.

It is a schematic diagram explaining the scrap collection | recovery installation which concerns on embodiment based on this invention. It is a schematic diagram which shows the conventional collection | recovery state, (a) is a side view, (b) is a top view. FIG. 6 is a schematic plan view for explaining the behavior when a long scrap comes into contact with a stopper. FIG. 6 is a schematic plan view for explaining the behavior when a short scrap comes into contact with a stopper. It is the schematic diagram which looked at the collection box concerning the embodiment based on the present invention from the upper part. It is a schematic diagram explaining the modification.

Next, embodiments of the present invention will be described with reference to the drawings.
In this embodiment, as metal strip, scrap generated by cutting the end of the steel strip along the width direction with a shear to align the longitudinal end face of the steel strip before processing such as cold rolling. Will be described as an example of the case of the collection target. Incidentally, the end portion of the steel strip from which scrap is generated by cutting may be the tip portion or the tail end portion. In cold rolling, for example, in order to join the tail end portion of the preceding material and the tip portion of the succeeding material, it is cut to align the end portions of the steel strip.

The metal strip targeted by the present invention is not limited to a steel strip, and may be a metal strip made of aluminum or other metals.
<Configuration>
As shown in FIG. 1, the scrap collection facility of this embodiment includes a chute 1, a stopper 2, a drive unit 3, a contact detection unit 4, a retreat processing unit 5, a fixed guide 6, and a collection box 7.

The chute 1 has an inclined surface 1A that is inclined obliquely downward from the shear 10 side toward the collection box 7 side. The width of the inclined surface 1A is wider than the width of the steel strip S.
The scrap ST generated by cutting with the shear 10 rides on the upper part of the inclined surface 1A of the chute 1, and the scrap ST slides down to the collection box 7 side along the inclined surface 1A.

The stopper 2 is disposed at a position where it can come into contact with the scrap ST sliding down along the inclined surface 1A, and the surface facing the chute 1 side constitutes the contact surface 2a. The contact surface 2a extends along the width direction of the inclined surface 1A on the lower end side of the chute 1. For example, the stopper 2 is made of a flat metal plate.
The stopper 2 of the present embodiment is disposed to face the lower end of the inclined surface 1A.

The contact surface 2a of the stopper 2 is preferably disposed so as to be orthogonal or substantially orthogonal to the inclined surface 1A. Moreover, it is preferable that the lower end part of the stopper 2 protrudes below rather than the lower end (left end position in FIG. 1) of 1 A of inclined surfaces.
The upper part of the stopper 2 is fixed to a rotating shaft P whose axis is directed in the lateral direction (direction parallel to the width direction of the inclined surface 1A). The stopper 2 is centered on the rotating axis P, that is, the upper part of the stopper 2 It can be rotated up and down around the side. For example, the stopper 2 can be rotated forward and backward between a closed position X facing the inclined surface 1A and a retracted position Y that is rotationally displaced by 80 degrees in the direction away from the inclined surface 1A from the closed position X. It only has to be.

  The drive unit 3 is a drive device that rotates the stopper 2 around the rotation axis P in the forward and reverse directions between the closing position X and the retracted position Y. The drive unit 3 may be composed of a motor that directly rotates the rotation shaft P. In this embodiment, the case where the drive part 3 has a cylinder apparatus is illustrated as shown in FIG. The cylinder device may be pneumatic or hydraulic. The cylinder device constituting the drive unit 3 is, for example, connected with the tip of the cylinder rod on the back side of the stopper 2, and is arranged with the axis directed obliquely upward away from the stopper 2, so that the bottom surface of the cylinder body can be rotated. It is supported by.

  According to this cylinder device, the stopper 2 is held at the closed position X by extending the cylinder rod, and the stopper 2 is rotationally displaced toward the retracted position Y by contracting the cylinder rod. The movement of the stopper 2 from the closing position X to the retracted position Y is preferably performed slowly, for example, taking 3 seconds or more, since it is possible to suppress the initial acceleration of the temporarily stopped scrap ST.

Here, although the case where the stopper 2 is rotationally driven is illustrated in the present embodiment, a structure that opens and closes when the stopper 2 slides and moves in the vertical direction and the horizontal direction may be used. Even in this case, from the viewpoint of suppressing the acceleration of the scrap ST, it is preferable that the chute 1 can be moved in a direction along the moving direction of the scrap.
The contact detection unit 4 detects that the scrap ST has contacted (collised) with the contact surface 2 a of the stopper 2. The contact detection unit 4 may be detected by an axial force input to the rotary shaft P when the scrap ST collides with the stopper 2 or may be detected by an elapsed time after being cut by the shear 10. However, the determination may be made based on the image captured by the camera.

The contact detection unit 4 according to the present embodiment detects the load applied to the cylinder device when the scrap ST collides with the stopper 2. For example, a load cell may be provided as the contact detection unit 4, or contact may be detected based on temporary expansion and contraction of the cylinder rod due to a collision of the scrap ST or fluid pressure fluctuation.
When the evacuation processing unit 5 determines that the scrap ST has collided with the stopper 2 based on the detection of the contact detection unit 4, it determines whether or not a preset time (for example, 3 seconds) has elapsed, and determines that it has elapsed. In this case, the stopper 2 is rotationally displaced to the retracted position Y via the drive unit 3.

The preset time is the time required for the posture of the scrap ST that is in contact with the stopper 2 at a predetermined sliding speed to be stabilized. This time is set based on experiments and theoretical values.
The fixed guide 6 is disposed at a position offset to a position obliquely below the lower end of the chute 1. That is, the fixed guide 6 is installed at a position at a predetermined distance D from the lower end of the inclined surface 1A along the inclination direction of the inclined surface 1A. However, the inclined surface 1A is offset slightly downward from the virtual surface extending in the inclination direction so that the long scrap ST2 can be surely transferred. The upper surface (also referred to as sliding surface 6A) of the fixed guide 6 is also inclined in the same direction as the inclined surface 1A.

Note that the fixed guide 6 is located farther from the inclined surface 1A than the stopper 2 at the closing position X.
The distance of the gap D between the inclined surface 1A and the fixed guide 6 is a distance obtained by adding a margin to the half of the maximum value of the short scrap ST1.
Although there is no particular provision for the classification of the short scrap ST1 and the long scrap ST2, for example, the cut width is 300 mm or less, for example. Or 1/3 or less of the plate width of the steel strip S is made short. The cut width of 300 mm or less refers to a rectangular plate having a short side of scrap of 300 mm or less. The shorter the short side, the easier it is to be collected in the collection box 7 in an inverted state when it falls upside down.

In FIG. 1, reference numeral 8 denotes a guide plate that guides the scrap ST dropped from the gap D between the chute 1 and the fixed guide 6 to a location near the chute 1 in the collection box 7 more reliably. is there.
The collection box 7 is a container whose upper surface is open, and is free-falling after sliding on the short scrap ST1 that has fallen freely from the gap D between the chute 1 and the fixed guide 6 and the sliding surface 6A of the fixed guide 6. It arrange | positions in the position which can collect | recover both of long scrap ST2.

<Operation other>
As shown in FIG. 1, when the lower blade of the shear 10 is raised to lift the end of the steel strip S and then the end is cut, the cut piece becomes the scrap ST on the inclined surface 1 </ b> A of the chute 1. Fall into. Reference numeral 11 denotes a table roller that conveys the steel strip S.
The scrap ST falling on the chute 1 slides down along the inclined surface 1A of the chute 1. The sliding speed varies depending on the inclination angle of the inclined surface 1A, the length of the inclined surface 1A, and the like.

When the scrap ST falls toward the inclined surface 1A or slides down the inclined surface 1A, the scrap ST tends to slide while changing its posture. In particular, the short scrap ST1 having a short cut width is easily changed in posture (orientation).
When the scrap ST that has slid down to the lower end of the inclined surface 1A is recovered as it is in the recovery box 7 by being dropped freely toward the recovery box 7 as it is, as shown in FIG. In addition, the scraps ST1 and the long scraps ST2 are mixed, and the scraps ST are stacked in a random posture.

  At this time, for example, when the short scrap ST1 falls into the collection box 7 in a state in which the posture is rotated and displaced 90 degrees (a state in which the long side faces the sliding direction), the standing state is set upside down in the collection box 7. there is a possibility. If there is an inverted scrap ST, the collection box 7 may soon fill up, for example, the next falling scrap ST abuts on the upper end of the inverted scrap ST to create a useless space below.

  On the other hand, in this embodiment, the scrap ST that has dropped the chute 1 once comes into contact with the stopper 2 and temporarily stops. At this time, the scrap ST that has collided with the contact surface 2a of the stopper 2 has an inertial force at the time of sliding. For example, as shown in FIGS. 3 and 4, the scrap ST is inclined obliquely with respect to the inclination direction of the inclined surface 1A. When it collides with the stopper 2 in a state where it is in contact with the stopper 2, the part that collided with the stopper 2 can no longer fall, but the other part slides along the inclined surface 1A toward the contact surface 2a of the stopper 2 due to inertia, The end surface position of the scrap ST is easily aligned along the contact surface 2 a of the stopper 2. That is, the posture is adjusted by the stopper 2 at the closing position X so that one side of the scrap ST faces the width direction of the inclined surface 1A, and the inertial force when the scrap ST slides is once adjusted to zero.

FIG. 3 illustrates the case where the scrap ST is long, and FIG. 4 illustrates the case where the scrap ST is short.
In the case of a long length, since it has a rectangular shape close to a square shape with the width of the steel strip S as one side, or a rectangular shape with the other side close to the width of the steel strip S, it is temporarily inverted. Even if it falls into the collection box 7, it does not easily stand upright by being stuck into the gap D of the scrap that has fallen so far, but it is still easy to create a useless space by dropping randomly. On the other hand, in this embodiment, as shown in FIG. 3, when contacting the stopper 2 in an oblique posture, the posture of the scrap ST is changed around the contacted position, and one side of the scrap ST is the stopper 2. The posture is adjusted to a state in contact with (the one-dot chain line posture). That is, the stopper 2 makes it easy to align the end surfaces of the scrap ST once. At this time, the end face tends to be adjusted so that the long side is along the contact surface 2 a of the stopper 2.

  In the case of a short length, the scrap ST has a long and narrow rectangular shape as the cut width is smaller. And in the case of a short length compared with a long length, it is easy to rotate freely and to change an attitude | position. In the case of a short length, since it is elongated, if it falls into the collection box 7 in an inverted posture rotated 90 degrees, there is a possibility that it will be stuck in the gap of the scrap ST that has fallen so far. On the other hand, in the present embodiment, when the short corner is brought into contact with the stopper 2, the scrap ST1 rotates around the contacted position as shown in FIG. The end face position is adjusted so as to come into contact with the contact surface 2a of the stopper 2 (the posture of the one-dot chain line). Here, although it is assumed that the stopper 2 comes into contact with the 90-degree posture completely, the stable long side tends to come into contact with the stopper 2 due to the rotating force during sliding.

In this way, when it is estimated that the time required to change the position of the scrap ST to a position where one side (mainly the long side) of the stopper 2 is in contact with the contact surface 2a of the stopper 2 elapses. The stopper 2 moves to the retracted position Y.
Here, the time until the posture of the scrap ST is stabilized varies depending on the sliding speed of the scrap ST below the inclined surface 1A.

When the stopper 2 starts moving in the direction away from the inclined surface 1A toward the retreat position Y, the scrap ST temporarily stopped by the stopper 2 starts moving in the dropping direction again.
At this time, since the short scrap ST1 moves with its short side facing sideways, if the center of gravity is located in the gap D between the chute 1 and the fixed guide 6, it will fall freely from the gap D. Become.

Here, since the scrap ST abutting against the stopper 2 has no inertial force, it is only a margin for half of the maximum value of the target short cut width (distance from the center of gravity of the scrap ST to the long side). If the distance of the gap D is set to the added value, the short scrap ST1 will fall from the gap D.
At this time, by slowly moving the moving speed of the stopper 2 in the retracting direction, the short scrap ST1 that moves along with the movement of the stopper 2 falls from the gap D in a state where the inertia force is small, and the recovery box 7 It will be collected concentrated on the front side. At this time, the paper is collected in the collection box 7 with the short directions aligned.

  On the other hand, the long scrap ST2 has a predetermined length or more in the moving direction (falling direction) regardless of which side the end face is aligned by the stopper 2. It moves to the guide surface of the fixed guide 6 without falling, slides on the fixed guide 6 as it is, and then falls freely into the collection box 7. Also in this case, at least one side (mainly easily aligned with the long side) is collected in the collection box 7 along substantially the same direction.

As described above, even when scrap STs of various cut widths are mixed and fall into one collection box 7, as a result of being collected in the collection box 7 with the sides of the scrap ST aligned, Many scrap STs can be collected in one collection box 7.
In particular, according to the present embodiment, according to the cut width, by separating into two types of scrap STs and separating the falling positions of the respective scraps ST, it is further avoided that unnecessary voids are formed, and more scraps ST can be produced. It can be collected in one collection box 7.

In addition, by providing an air outlet on the inclined surface 1A of the chute 1, the friction between the inclined surface 1A and the scrap ST is reduced so that the posture of the scrap ST sliding down the inclined surface 1A can be easily changed. good.
The collection box 7 for the short scrap ST1 and the collection box 7 for the long scrap ST2 may be separate boxes.

As described above, the distinction between the short length and the long length is not particularly limited. For example, when the cut width is 300 mm or less, the short length is set as follows, for example.
Gap D = (300/2) + α = 150 mm + α
α: allowance (for example, 10 to 20 mm)
There may be a gap C between the lower end of the chute 1 and the stopper 2 in the closed state. The gap C is, for example, 100 mm or less.
In this case, even if the stopper 2 is in the closed state, a short scrap ST1 having a cut width of C or less falls from the gap C between the chute 1 and the fixed guide 6 even if the stopper 2 is in the closed state. However, even in this case, it is easy to fall after the long side direction is directed to the direction along the surface of the stopper 2. The gap C is preferably equal to or less than the minimum cut width of scrap.

<Modification example>
Here, although the case where it has the fixed guide 6 is illustrated in the said embodiment, it is not limited to this. In this case, the short scrap ST1 and the long scrap ST2 are mixed and recovered in the recovery box 7. However, since the scrap ST is easily recovered in a state where the sides of the scrap ST are aligned in the same direction, It is possible to collect a larger volume in one collection box 7 than the other.

  Further, instead of providing the fixed guide 6, as shown in FIG. 6, a gate 20 capable of closing the gap D may be provided. And only when it determines with scrap ST being short, you may make it process so that the gate 20 may be opened. Whether it is short or long can be determined at the time of cutting with the shear 10. Moreover, you may determine from the magnitude | size of the collision force of the scrap ST to the stopper 2. FIG.

1A Inclined surface 2 Stopper 2a Contact surface 3 Drive unit 4 Contact detection unit 5 Retraction processing unit 6 Fixed guide 6A Sliding surface 7 Collection box 10 Shear 20 Gate C Gap D Gap P Rotating shaft S Steel strip ST Scrap ST1 Short scrap ST2 Long scrap X Closed position Y Retracted position

Claims (2)

An apparatus for collecting scrap generated by cutting an end of a metal strip,
A chute having an inclined surface where the scrap slides down;
A collection box that is open at the top and can accommodate scrap dropped from the bottom of the chute,
It has a contact surface extending along the width direction of the inclined surface on the lower end side of the chute, and the contact surface is in a position where it can contact scrap scraped down along the inclined surface. An arranged stopper,
A contact detection unit that detects contact of the scrap with the contact surface;
When the contact detection unit detects contact of the scrap, a retreat processing unit that retreats the stopper to a retreat position that does not contact the scrap after a preset time has elapsed ;
A fixed guide disposed at a predetermined interval in a direction along the inclined direction with respect to a lower end of the inclined surface of the inclined surface,
The predetermined interval, which is the distance of the gap between the inclined surface and the fixed guide, is such that a short scrap can fall into the collection box from the gap, and a long scrap does not fall from the gap on the fixed guide. The scrap collection facility is characterized in that it is set at an interval to fall into the collection box after sliding . The stopper contact surface faces the lower end of the chute in the inclination direction of the inclined surface, the lower end of the contact surface is positioned below the inclined surface, and the stopper has an upper position. It is supported at the center so that it can be rotated up and down,
2. The retreat processing unit moves the stopper located at a position capable of contacting the scrap toward the retreat position by rotationally displacing the stopper in a direction away from a lower end portion of the chute. The scrap collection equipment described in 1.

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