JP5891070B2 - Steel cooling floor - Google Patents

Description

The present invention relates to a steel material cooling floor that rotates and cools a steel material.

A steel material having a rectangular cross section (including a square) such as a billet is cut into a predetermined length through continuous casting, then cooled on a steel material cooling floor, and then carried out by a magnet crane or the like. Some steel cooling floors rotate a steel material by 90 ° about an axis when moving the steel material, and a specific example is described in Patent Document 1.
The steel material cooling floor of Patent Document 1 acquires the steel material placed on the standby table by moving the movable rake, places it on the fixed rake, and moves a plurality of steel materials placed on the fixed rake on the fixed rake. . The steel material cooling floor can rotate the steel material by 90 ° when moving the steel material. The steel material is effective because the rotation of the steel material promotes cooling and corrects the bending.

By the way, in a continuous casting facility including a plurality of strands, a plurality of steel materials are cast at a time, and the plurality of steel materials are collected on a standby table.
Assuming that the number of steel materials collected on the standby table at a time is X and the cycle time when the steel materials are collected on the standby table is T, the steel cooling floor removes X steel materials from the standby table during T time. Need to get.

Japanese Patent Laid-Open No. 61-3824

However, since the steel material cooling floor of Patent Document 1 acquires steel materials one by one from the standby table, the operation cycle of the movable rake is T / X, and when X increases, the operation cycle of the movable rake becomes shorter. The time interval for rotating the steel material by 90 ° (that is, the time interval for rotating the steel material) is shortened.
Here, when rotating the steel material, the inventors of the present application improve the bending correction effect of the steel material by rotating the steel material by 90 ° at a time interval of 20 to 40 seconds, and less than 20 seconds. As a result, it is known from operational experience that the effect of correcting the bending of the steel material is significantly reduced.
In order to secure a time interval for rotating the steel material by 90 ° for 20 seconds or more, it is necessary to obtain a plurality of steel materials at a time from the standby table.
This invention is made | formed in view of this situation, and it aims at providing the steel-material cooling floor which can acquire several steel materials at once.

The steel material cooling floor according to the first invention that meets the above-mentioned object is a first long rake having a plurality of steel material mounting grooves on which steel materials having a rectangular cross section are placed, and descends at a forward position, and at the retracted position, The steel material scooped up from the steel material placing groove has a second rake that is long before and after placing the steel material in the steel material placing groove in front of the steel material placing groove with rotation. A steel cooling floor that cools while correcting the bending of the steel by placing the steel in a steel material mounting groove, and a plurality of the steel materials are arranged closely in parallel in the front-rear direction on the steel cooling floor. The standby table is arranged in proximity, and the second rake has a horizontal portion provided at the rear of the region having the N steel material acquisition grooves and the N steel material acquisition grooves each having a front-falling inclined surface. And the second rake ascends in the retracted position and the standby table N + 1 pieces of steel materials are obtained from 1) and the obtained N + 1 pieces of steel materials are held by placing 1) the last steel material on the horizontal portion and 2) N pieces of the remaining steel materials, Placed on the inclined surface of the steel material acquisition groove, moved along the inclined surface by the weight of the steel material, held in the steel material acquisition groove, N + 1 pieces of the steel material acquired from the standby table, respectively, Keep in a non-contact state with the steel. However, N is a natural number.

In the steel material cooling floor according to the first invention, the forward position where the second rake descends is away from the retracted position where the second rake ascends by a distance of N + 1 steel material mounting grooves. The second rake is moved up after being raised at the retracted position, moved downward at the advanced position, and scooped up from the steel material placing groove at the retracted position by N + 1 pieces. It is preferable to place it in the steel material mounting groove on the front, move to the retracted position, and rise again.

The steel material cooling floor according to the second aspect of the present invention, which is provided with a plurality of steel material mounting grooves on which a steel material having a rectangular cross section is placed, is lowered at the front and back, and descends at the forward position, and at the retracted position. The steel material scooped up from the steel material placing groove has a second rake that is long before and after placing the steel material in the steel material placing groove in front of the steel material placing groove with rotation. A steel cooling floor that cools while correcting the bending of the steel by placing the steel in a steel material mounting groove, and a plurality of the steel materials are arranged closely in parallel in the front-rear direction on the steel cooling floor. A plurality of steel material acquisition grooves having a plurality of forwardly-lowering inclined surfaces are formed in the second rake, and the second rake is in the retracted position. Ascend and acquire M steel materials from the standby table, Each material is placed on the inclined surface of each of the M steel material acquisition grooves, is moved along the inclined surface by its own weight, is held in the steel material acquisition groove, and is not in contact with each of the other steel materials. Keep in state. However, M is an integer of 2 or more.

In the steel material cooling floor according to the second aspect of the invention, the forward position where the second rake descends is separated from the retracted position where the second rake rises forward by a distance of the M steel material placing grooves. The second rake is moved up after being lifted at the retracted position, moved downward at the advanced position, and scooped up from the steel material mounting groove at the retracted position by M pieces of steel. It is preferable to place it in the steel material mounting groove on the front, move to the retracted position, and rise again.

In the steel material cooling floor according to the first and second inventions, the steel material cooling floor is disposed in front of the steel material cooling table in the front-rear direction in parallel, and the second rake is When moving forward from the retracted position, the steel material on the collecting table is pushed forward to secure an empty space on the collecting table, lowered at the advanced position, and placed on the second rake. The steel material is preferably placed in the empty space.

In steel cooling bed according to the first, the second invention, the steel mounting置溝comprises a horizontal bottom, the steel is to hold in a state where one surface of the steel material is in contact with the water flat bottom preferable.

In the steel material cooling floor according to the first and second inventions, the second rake rises at the retracted position and acquires a plurality of steel materials from the standby table.
Therefore, the steel cooling floor can acquire a plurality of steel materials from the standby table at a time, and in a continuous casting facility in which a plurality of steel materials are collected on the standby table at a time, the second rake operating cycle is shortened. It is possible to suppress a reduction in the time for correcting the bending.
In addition, the second rake is provided with a steel material acquisition groove having an inclined surface that is inclined downward, and the second rake places the steel material on the inclined surface of the steel material acquisition groove and follows the inclined surface by the weight of the steel material. Are moved and held in the steel material acquisition groove, and the plurality of steel materials acquired from the standby table are kept in contact with other steel materials, respectively, so that the plurality of steel materials acquired from the standby table are each in contact with other steel materials. It is possible to put it in a state where it is separated and efficiently cooled.

Particularly, in the steel material cooling floor according to the first aspect of the present invention, the second rake in which the horizontal portion is formed holds the last steel material among the N + 1 steel materials obtained from the standby table and holds it on the horizontal portion. The structure of the second rake can be simplified by reducing the number of steel material acquisition grooves formed in the second rake.

In the steel material cooling floor according to the first and second inventions, the second rake moves forward after rising at the retracted position, descends at the advanced position, and scoops up the steel material from the steel material mounting groove at the retracted position. When the steel material is placed on the steel material placement groove, moved to the retracted position, and then raised again, the steel material can be reliably fed forward.

In the steel cooling floor according to the first and second inventions, when the second rake advances from the retracted position, the steel material on the collecting table is pushed forward to secure an empty space on the collecting table, When the steel material that has been lowered to the forward position and placed on the second rake is placed in an empty space, the second rake can also be used to secure an empty space for placing the steel material on the collecting table. It is economical because it is not necessary to provide additional equipment for securing.

In the steel material cooling floor according to the first and second inventions, when the steel material placing groove has a horizontal bottom and the steel material is held in a state where one surface of the steel material is in contact with the horizontal bottom, the steel material placing groove. It is possible to keep the steel material in a state where the vertical bending is efficiently corrected.

It is a sectional side view of the steel material cooling floor which concerns on one embodiment of this invention. It is a partially-omission plan view of the steel material cooling floor. (A), (B) is a partially abbreviated plan view of the steel material cooling floor showing a state in which the second rake is in the forward movement position and a state in which the second rake is in the backward movement position, respectively. (A)-(D) are explanatory drawings which show the motion of the 2nd rake. (A)-(C) are explanatory drawings which show the motion of the 2nd rake. (A)-(D) are explanatory drawings which show the mode of acquisition of the steel materials from the standby table of the modification of a steel material cooling floor. (A)-(D) are explanatory drawings which show the mode of acquisition of the steel materials from the standby table of the modification of a steel material cooling floor.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
As shown in FIGS. 1 and 2, a steel material cooling floor 10 according to an embodiment of the present invention includes a plurality of steel material placing grooves 12 in which steel materials 11 having a rectangular cross section are placed, and a first rake that is long in the front and rear direction. 13, the steel material 11 that has been lowered at the forward movement position and scooped up from the steel material placement groove 12 at the backward movement position is placed in the steel material placement groove 12 that is ahead of the steel material placement groove 12 where the steel material 11 was present with rotation. It has a second rake 14 that is long in the front-rear direction. Details will be described below.

The steel material 11 conveyed forward by the steel material cooling floor 10 is a billet that has been cast in a continuous casting facility having a plurality of strands and then cut to a predetermined length, and has a square cross section as shown in FIG. is there. After being cut, the steel material 11 is conveyed to a standby table 15 shown in FIGS. 1 and 2 and collected on the standby table 15 at predetermined time intervals.
The standby table 15 includes a plurality of chain transfers 15a, and the plurality of steel materials 11 sent to the standby table 15 are collected by operating the chain transfer 15a. The plurality of steel materials 11 collected on the standby table 15 are arranged in parallel in a state where the longitudinal direction is orthogonal to the conveying direction and the front surface and the rear surface of each steel material 11 are in close contact with each other.

As shown in FIGS. 2, 3 (A), and (B), the steel material cooling floor 10 disposed in front of the standby table 15 and in proximity to the standby table 15 includes a plurality of first lakes 13 and a plurality of first lakes 13. The two rakes 14 are provided, and the second rake 14 is moved with respect to the first rake 13 to obtain the steel material 11 from the standby table 15, and the obtained steel material 11 is conveyed forward. The temperature of the steel material 11 is 850 to 950 ° C. on the standby table 15, and the steel material cooling floor 10 is cooled while conveying the steel material 11.
Further, in front of the steel material cooling floor 10, a collecting table 16 in which a plurality of steel materials 11 are arranged in parallel in the front-rear direction is disposed close to the steel material cooling floor 10, and the steel material 11 conveyed to the collecting table 16 by the steel material cooling floor 10 is a magnet crane. Etc., and put in place.

The first and second rakes 13 and 14 are long metal fittings extending in a direction orthogonal to the longitudinal direction of the steel material 11, and each first rake 13 is the other first rake 13. And kept parallel to all second rakes 14. In the present embodiment, the first and second rakes 13 and 14 are arranged alternately, but it is not always necessary to arrange them alternately.
As shown in FIG. 1, the steel material cooling floor 10 is provided with hydraulic cylinders 17 and 18 that move the second rake 14 back and forth, and a beam 19 that supports the second rake 14.
The hydraulic cylinders 17 and 18 are respectively connected to one side and the other side of the second rake 14 in the longitudinal direction, and are fixed to the beam 19. The second rake 14 is supported by the beam 19 so as to be able to advance and retract, and is advanced and retracted with respect to the beam 19 by the operation of the hydraulic cylinders 17 and 18.

The beam 19 is connected to an actuator (not shown) and moves up and down by the operation of the actuator.
As a result, the second rake 14 rises with the beam 19 at the retracted position, moves forward by the operation of the hydraulic cylinders 17 and 18, and then falls with the beam 19 to the lower limit position at the advanced position. The second rake 14 moves backward by the operation of the hydraulic cylinders 17 and 18 and then stops for a predetermined time (3 to 10 seconds in the present embodiment) at the home position (reverse lower limit position which is the reverse position and the lower limit position). . Thus, the second rake 14 moves so as to draw a rectangular trajectory when viewed from the side by the actuator and the hydraulic cylinders 17 and 18 connected to the beam 19.
In the present embodiment, the first rake 13 is fixed.
3A and 3B show a state where the second rake 14 is disposed at the forward position and a state where the second rake 14 is disposed at the backward position, respectively.

As shown in FIG. 1, each of the first and second lakes 13 and 14 is formed with a plurality of grooves for holding the steel material 11.
The first rake 13 is continuously provided with a horizontal portion 20, triangular grooves 21 and 22, a plurality of steel material mounting grooves 12 and a horizontal portion 23 from the rear end to the front end.
On the other hand, the second rake 14 is provided with a horizontal portion 24, a steel material acquisition groove 25, and a plurality of steel material holding grooves 26 continuously from the rear end to the front end.

When the length of one side of the cross section square of the steel material 11 is L, the length of the horizontal portion 20 of the first rake 13 in the front-rear direction is longer than L, and the steel material 11 placed on the horizontal portion 20 is one of the steel materials 11. One surface comes into contact with the horizontal portion 20, and the steel material 11 is housed in the horizontal portion 20 in the front-rear direction in a plan view.
The triangular groove 21 of the first rake 13 (the same applies to the triangular groove 22) is composed of a front-lowering inclined surface and a front-upward inclined surface, and is formed in a V shape when viewed from the side. As shown in FIG. 4 (A), the inclined surface α of the triangular groove 21 has an inclination angle α larger than 0 degree and smaller than 45 degrees. The steel material 11 is hold | maintained in the state which one surface contact | abutted.

The steel material placing groove 12 of the first rake 13 includes a horizontal bottom 28 having a length in the front-rear direction longer than L, and the steel material 11 is in plan view when one surface of the steel material 11 is in contact with the horizontal bottom 28. The steel material 11 is held in a state of being stored in the horizontal bottom 28 in the front-rear direction. The steel material 11 placed on the horizontal bottom 28 is held in a state where the surface in contact with the horizontal bottom 28 is kept horizontal and the bending in the vertical direction is corrected by its own weight.
The horizontal portion 23 of the first rake 13 is also longer than the length L in the front-rear direction similarly to the horizontal portion 20, and the steel material 11 has one surface of the steel material 11 in contact with the horizontal portion 23, and the front and rear in plan view. It is placed on the horizontal part 23 in a state of being accommodated in the horizontal part 23 in the direction.

The horizontal portion 24 of the second rake 14 supports the steel material 11 in a state where one surface of the steel material 11 is in contact with the horizontal portion 24. The steel material 11 is placed on the horizontal portion 24 in a state where a part of the rear of the steel material 11 protrudes from the horizontal portion 24 in plan view.
As shown in FIG. 4 (A), the steel material acquisition groove 25 of the second rake 14 is composed of a forwardly inclined surface 29 and an upwardly inclined surface 30, and is formed in a V shape when viewed from the side. The inclined surface 29 has an inclination angle β of greater than 0 degree and less than 45 degrees (in the present embodiment, 30 degrees or more and less than 40 degrees), and an angle γ formed by the inclined surface 29 and the inclined surface 30 is greater than 90 degrees. It is less than 180 degrees (in this embodiment, 92 degrees or more and 100 degrees or less). The steel material acquisition groove 25 holds the steel material 11 in a state in which the corner of the steel material 11 is in contact with the bottom of the steel material acquisition groove 25 and one surface of the steel material 11 and the inclined surface 29 are in contact with each other.

The steel material holding groove 26 of the second rake 14 is composed of a front-lowering inclined surface and an upwardly-inclining inclined surface having an inclination angle θ of greater than 0 degree and less than 45 degrees, and is formed in a V shape when viewed from the side. . Similarly to the steel material acquisition groove 25, the corner portion of the steel material 11 is in contact with the bottom of the steel material holding groove 26, and one surface of the steel material 11 is in contact with the inclined surface of the steel material holding groove 26 in front of the steel material holding groove 26. In this state, the steel material 11 is held.
The standby table 15 is provided with a positioning member 31, and the steel material 11 (hereinafter also referred to as “first steel material 11”) in front of the standby table 15 is in contact with the positioning member 31. 15 is on. The first steel material 11 is in close contact with a steel group composed of a plurality of steel materials 11 in close contact with the rear side.

When the second rake 14 is in the retreat lower limit position, as shown in FIG. 4A, the steel material 11 is on the first rake 13 and the steel material 11 is not on the second rake 14. . At this time, the horizontal portion 24 and the steel material acquisition groove 25 of the second rake 14 are located behind the first rake 13, and the horizontal portion 24 is the first in front of the standby table 15 in plan view. A part of the steel material 11 overlaps with the second steel material 11 (hereinafter also referred to as “second steel material 11”) of the standby table 15.

The second rake 14 at the retreat lower limit position rises and contacts the first steel material 11 and the second steel material 11 at the horizontal portion 24.
The second steel material 11 (that is, the last steel material 11 out of the two steel materials 11 obtained from the standby table 15) is placed on the horizontal portion 24 as shown in FIG. Retained.
The first steel material 11 falls into the steel material acquisition groove 25 by its own weight because the first steel material 11 is in contact with the horizontal portion 24 with the center of gravity of the first steel material 11 positioned above the steel material acquisition groove 25 in a side view. The steel material 11 that has fallen into the steel material acquisition groove 25 is placed on the inclined surface 29 of the steel material acquisition groove 25, moves along the inclined surface 29 of the steel material acquisition groove 25 by its own weight, and stops at the bottom of the steel material acquisition groove 25. The steel material 11 stopped at the bottom of the steel material acquisition groove 25 is held in a state where one surface of the steel material 11 and the inclined surface 29 are in contact with each other.

The first steel material 11 and the second steel material 11 are kept in contact with the other steel materials 11 on the second rake 14, respectively.
As described above, the second lake 14 is configured such that the first steel material 11 and the second steel material 11, that is, the two steel materials 11 among the plurality of steel materials 11 placed on the standby table 15, are stored in the standby table at a time. 15 from.

The second rake 14 on which the first steel material 11 and the second steel material 11 are mounted moves forward after rising to the upper limit position, and as shown in FIG. (Upper limit position). This forward upper limit position is a position away from the backward upper limit position (the backward position and the upper limit position) by the distance between the two steel material placing grooves 12. The two steel material placement grooves 12 referred to here include 2 ± α (0 ≦ α ≦ 0.2), and the second rake 14 scoops up from the steel material placement groove 12 in the retracted position. The position where 11 can be placed on the two steel material placing grooves 12 ahead is the forward movement position.
The steel material 11 left on the standby table 15 is sent forward by the chain transfer 15 a in accordance with the advance of the second rake 14, and stops when the leading steel material 11 contacts the positioning member 31.
When the second rake 14 is disposed at the forward upper limit position, the first steel material 11 and the second steel material 11 are respectively above the triangular groove 21 of the first rake 13 and the horizontal portion 20 of the first rake 13. Is disposed above.

The second rake 14 at the forward upper limit position descends to place the first steel material 11 in the triangular groove 21 of the first rake 13 as shown in FIG. 11 is placed on the horizontal portion 20 of the first rake 13.
The second rake 14 lowered to the forward lower limit position (the forward position and the lower limit position) moves rearward and is disposed at the backward lower limit position.
4A to 4D, one corner of a square of the cross section of the steel material 11 is marked to show the state of rotation of the steel material 11.

Further, when the second rake 14 is at the retreat lower limit position, the steel members 11 in the horizontal portion 20, the triangular grooves 21, 22 and the steel material placing groove 12 of the first rake 13 are shown in FIG. As shown, the second rake 14 moves up on the second rake 14 as it rises from the reverse lower limit position. And each steel material 11 which moved on the 2nd rake 14 is returned on the 1st rake 13 when the 2nd rake 14 descends from the advance upper limit position, as shown in Drawing 4 (D). .
As a result, each steel material 11 on the first rake 13 moves forward. For example, the steel material 11 on the horizontal portion 20 of the first rake 13 moves to the triangular groove 22, and the triangular groove. The steel material 11 in 21 moves to the steel material placement groove 12 in front of the triangular groove 22, and each steel material 11 in the steel material placement groove 12 moves to the steel material placement groove 12 in the two front sides.

Here, as shown in FIG. 4 (C), the steel material placing groove 12 is provided with an inclined surface 32 that is on the rear side of the horizontal bottom 28 and is continuously formed on the horizontal bottom 28. ing. The inclined surface 32 of each steel material mounting groove 12 has an inclination angle ε of greater than 45 degrees and less than 90 degrees.
When the second rake 14 descends from the advance upper limit position, the inclined surface 32 of each steel material mounting groove 12 comes into contact with the steel material 11 in the steel material holding groove 26 of the second rake 14 so that the steel material 11 is Rotate forward.

As a result, the steel material 11 that was in the steel material placing groove 12 on the first rake 13 is scooped up by the second rake 14 and returned to the first rake 13, so that it scoops at the second rake 14. It is rotated 90 degrees from the state of being placed on the first rake 13 before being raised and placed in the steel material placing groove 12.
In the present embodiment, the steel material 11 is secured in the steel material placement groove 12 for 10 to 30 seconds, so that the bending of the steel material 11 can be corrected efficiently.

As shown in FIG. 5 (A), the steel material 11 that was on the horizontal portion 23 of the first rake 13 when the second rake 14 is at the retreat lower limit position is raised by the second rake 14 rising. As shown in FIGS. 5B and 5C, when the second rake 14 moves down to the steel material holding groove 26 in front of the second rake 14 and descends from the advance upper limit position, 16 is moved to.
Further, as shown in FIG. 5 (A), the steel material 11 placed in the steel material placing groove 12 behind the horizontal portion 23 when the second rake 14 is at the retreat lower limit position, 14, after moving to the second steel material holding groove 26 from before 14, it is placed on the collecting table 16 as shown in FIGS.
Therefore, when the second rake 14 descends from the forward upper limit position, the two steel materials 11 move from the second rake 14 to the gathering table 16 at a time.
The second rake 14 pushes the two steel materials 11 that the second rake 14 has moved onto the collecting table 16 forward when moving forward from the retreat upper limit position. An empty space for placing a new steel material 11 is secured. In this empty space, when the second rake 14 descends at the forward upper limit position, the two steel materials 11 placed on the first and second steel material holding grooves 26 from the front are placed.

As mentioned above, although the steel material cooling floor which acquires two steel materials at once from a standby table was demonstrated, the steel material cooling floor was changed by changing the shape of the groove | channel of a 1st, 2nd rake, and the movable range of a 2nd rake. However, it is also possible to acquire three or more steel materials at a time from the standby table.
Although the steel material cooling floor 10 includes one steel material acquisition groove 25 in the second rake 14, the number of steel material acquisition grooves provided in the second rake having the horizontal portion is not limited to one. When providing N steel material acquisition grooves in the second rake having the horizontal portion, the second rake acquires N + 1 steel materials at a time from the standby table. The second rake having the horizontal portion and the N steel material acquisition grooves is N + 1 (N + 1 ± α means 0 ≦ α ≦ 0.2) steel material placement grooves forward from the retreat upper limit position. The plurality of steel materials scooped up from the standby table and the steel material mounting groove are advanced in the retracted position by moving forward and descending to a front upper limit position separated by a distance of.

For example, the steel material cooling floor 40 which is a modification of the steel material cooling floor 10 acquires three steel materials 11 at a time from the standby table 15 as shown in FIGS.
In the steel material cooling floor 40, the second rake 41 includes a horizontal portion 42 that acquires the third steel material 11 from the front on the standby table 15 and two steel material acquisition grooves 43 and 44. The steel material acquisition grooves 43 and 44 are provided at the rear of the steel material holding groove group including a plurality of steel material holding grooves, and are respectively in the front row on the steel material 11 and the standby table 15 that are second from the front on the standby table 15. It is a groove for obtaining the steel material 11.
In FIGS. 6A to 6D, the steel material 11 placed on the first rake 45 is omitted when the second rake 41 is at the retreat lower limit position.

Moreover, like the steel material cooling floors 10 and 40, the steel material cooling floor provided with a horizontal portion behind the steel material acquisition grooves acquires one steel material, which is one more than the number of the steel material acquisition grooves, from the standby table at a time. Specifically, if N steel material acquisition grooves are provided, the steel material cooling floor is configured by placing one steel material on the horizontal part and placing each of the N steel materials in each of the N steel material acquisition grooves. N + 1 steel materials are acquired from the standby table at a time.
On the other hand, in a steel material cooling floor having no horizontal portion behind the steel material acquisition groove, the number of steel materials acquired from the standby table at a time is the same as the number of steel material acquisition grooves.

As shown in FIGS. 7A to 7D, a steel material cooling floor 50, which is a modified example of the steel material cooling floor 10, is used together with the second lake 51 and the second lake 51 that do not have a horizontal portion. 1 rake 52.
In the second rake 51, steel material acquisition grooves 53 and 54 are formed behind a steel material holding groove group composed of a plurality of steel material holding grooves. As shown in FIGS. 7A and 7B, the second rake 51 is the steel material 11 that is the first from the front on the standby table 15 and the second from the front when it rises from the retreat lower limit position. The steel material 11 is acquired by the steel material acquisition grooves 53 and 54, respectively.
Each steel material 11 acquired from the standby table 15 moves along the inclined surfaces of the steel material acquisition grooves 53 and 54 by its own weight, and is held in a non-contact state with the other steel materials 11. .

And as shown in FIG.7 (C), (D), the 2nd lake 51 descend | falls from the advance upper limit position, and each steel material 11 currently mounted in the steel material acquisition groove | channels 53 and 54 is made into 1st It moves to the triangular grooves 55 and 56 formed in the rake 52.
7A to 7D, the steel material 11 placed on the first rake 52 is omitted when the second rake 51 is at the retreat lower limit position.
Further, the steel material cooling floor 50 includes two steel material acquisition grooves 53 and 54 in the second rake 51 and acquires two steel materials 11 from the standby table 15 at a time, but M (M is an integer of 2 or more). ) When the steel material acquisition grooves are provided in the second rake, M steel materials 11 can be acquired from the standby table 15 at a time. The second rake provided with M steel material acquisition grooves moves forward from the retreat upper limit position by the distance of M steel material mounting grooves (M ± α meaning: 0 ≦ α ≦ 0.2). Arranged at the upper limit position.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and all changes in conditions and the like that do not depart from the gist are within the scope of the present invention.
For example, the steel material conveyed by the steel material cooling floor is not limited to a billet having a square cross section, and may have a rectangular cross section. It is also possible to employ a first rake that moves up and down and back and forth.

10: Steel material cooling floor, 11: Steel material, 12: Steel material mounting groove, 13: First rake, 14: Second rake, 15: Standby table, 15a: Chain transfer, 16: Gathering table, 17, 18 : Hydraulic cylinder, 19: Beam, 20: Horizontal part, 21, 22: Triangular groove, 23: Horizontal part, 24: Horizontal part, 25: Steel material acquisition groove, 26: Steel material holding groove, 28: Horizontal bottom, 29, 30 : Inclined surface, 31: positioning member, 32: inclined surface, 40: steel cooling floor, 41: second rake, 42: horizontal portion, 43, 44: steel material acquisition groove, 45: first rake, 50: steel material Cooling floor, 51: second lake, 52: first lake, 53, 54: steel material acquisition groove, 55, 56: triangular groove

Claims (6)

A first rake with a plurality of steel material mounting grooves on which a steel material having a rectangular cross section is placed, and the steel material that descends at the forward position and scoops up from the steel material mounting groove at the retracted position, with rotation. And a second rake that is long before and after placing the steel material in the steel material placing groove in front of the steel material placing groove, and placing the steel material in the steel material placing groove and bending the steel material. A steel cooling floor that cools while straightening,
In the steel material cooling floor, a standby table in which a plurality of the steel materials are closely arranged in parallel in the front-rear direction is disposed close to the rear, and the second rake includes N pieces each having a front-declining inclined surface. Steel material acquisition grooves and a horizontal portion provided behind a region having the N steel material acquisition grooves are formed, and the second rake is lifted at the retracted position to increase N + 1 pieces of the standby table. The steel material is acquired, and the acquired N + 1 steel materials are held by placing 1) the last steel material on the horizontal portion, and 2) the remaining N steel materials in each of the N steel material acquisition grooves. Placed on the inclined surface, moved along the inclined surface by the weight of the steel material, held in the steel material acquisition groove, and N + 1 pieces of the steel materials acquired from the standby table are not in contact with the other steel materials, respectively. Steel cooling floor, characterized by keeping in the state of. 2. The steel material cooling floor according to claim 1, wherein the forward movement position at which the second rake descends is a position away from the backward movement position at which the second rake rises by a distance of the N + 1 steel material mounting grooves. The second rake moves forward after being raised at the retracted position, descends at the advanced position, and moves forward by N + 1 pieces of the steel material scooped up from the steel material placing groove at the retracted position. The steel material cooling floor is placed on the steel material mounting groove, moved to the retracted position, and raised again. A first rake with a plurality of steel material mounting grooves on which a steel material having a rectangular cross section is placed, and the steel material that descends at the forward position and scoops up from the steel material mounting groove at the retracted position, with rotation. And a second rake that is long before and after placing the steel material in the steel material placing groove in front of the steel material placing groove, and placing the steel material in the steel material placing groove and bending the steel material. A steel cooling floor that cools while straightening,
A standby table in which a plurality of the steel materials are closely arranged in parallel in the front-rear direction is disposed in the rear of the steel material cooling floor, and a plurality of the second rakes having a front-declining inclined surface. M steel material acquisition grooves are formed, and the second rake rises at the retracted position to acquire M steel materials from the standby table, and each of the acquired M steel materials is M Placing on the inclined surface of each of the steel material acquisition grooves, moving along the inclined surface by the weight of the steel material and holding it in the steel material acquisition groove, and keeping each of the steel material non-contact with each other Features a steel cooling floor. 4. The steel material cooling floor according to claim 3, wherein the forward movement position where the second rake descends is a position away from the retreat position where the second rake rises by a distance of the M steel material placing grooves. The second rake moves forward after being raised at the retracted position, descends at the advanced position, and scoops up the steel material scooped up from the steel material placing groove at the retracted position by M pieces. The steel material cooling floor is placed on the steel material mounting groove, moved to the retracted position, and raised again. The steel material cooling floor of any one of Claims 1-4 WHEREIN: In the steel material cooling floor, the gathering table which arrange | positions the said some steel materials in parallel in the front-back direction is arrange | positioned closely at the front, The said 2nd When the rake advances from the retracted position, the steel material on the collecting table is pushed forward to secure an empty space on the collecting table, and is lowered at the advanced position. A steel cooling floor, wherein the steel material placed on a lake is placed in the empty space. The steel material cooling floor of any one of Claims 1-5 WHEREIN: The said steel material mounting groove | channel is equipped with the horizontal bottom, In the state which one surface of this steel material contact | abutted this horizontal bottom. A steel cooling floor characterized by holding.

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