JPH0284212A - Method for rotating rolled stock on cooling bed - Google Patents

Abstract

PURPOSE:To rotate the rolled stock on a fixed position by making a movable rake move horizontally and upward from a base position to lift up the rolled stock loaded on the fixed rake succeedingly to perform moving downward to unload on the fixed rake, then, making it move horizontally and downward on the base position side. CONSTITUTION:The moving rake 3 is made lifting motion through a lifting apparatus 13 while making the horizontal movement from the base position (a) backward in the conveying direction S through a shifting apparatus 20. Then, the rolled stock 1 on a receiving groove 5 of the fixed rake 2 is moved to load and on a receiving groove 6 of the movable rake 3 and to lift. Secondly, the rolled stock 1 is moved horizontally backward the conveying direction S, when the movable rake 3 reaches at an upper end position (d), then it is moved downward to load the rolled stock 1 to move on the receiving groove 5 of the fixed rake 2. After that, while taking down the movable rake 3, it is moved horizontally to the base position (a) side. Therefore, by moving the movable rake 3 along the moving path repeatedly, the rolled stock 1 is rotated on the receiving groove 5 of the fixed rake 2 without conveying.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention provides a rotary conveyance device for rolled material having a cooling bed constituted by a fixed rake and a moving rake, in which the rolled material can be kept at a fixed position without being conveyed. Regarding how to rotate.

(Prior art) Rolled steel bars leaving the bar rolling equipment are transferred to the finishing equipment as long as they are, and while they are being conveyed in parallel onto the cooling bed consisting of a moving rake and a fixed rake in the equipment. Patent Application No. 60-178315 discloses that this material is naturally cooled, and the cooled steel bars are transferred as one group to a cold cutting device (cold shear) and cut into fixed sizes to produce products. has already been proposed.

In the above cooling bed, substantially V-shaped receiving grooves are arranged in parallel in both the fixed and moving rakes at equal intervals in the conveying direction, and when the moving rake is driven, the receiving groove of the moving rake moves circularly on the vertical plane. As a result, the steel bar on the receiving groove of the fixed rake is lifted by the receiving groove of the moving rake and conveyed to the front side.
It is transferred to the receiving groove of the fixed rake.

By the way, in order to prevent bending due to uneven heat of the steel bar on the cooling bed or to correct bending due to its own weight,
It is preferable to transport the steel bar while rotating it on a cooling bed.

Therefore, in order to solve the above problem, the applicant of the present application proposed in Japanese Patent Application No. 62-102882 that a traverser is provided in addition to a fixed rake and a moving rake, and after the moving rake has made one cycle of movement, the traverser is We have proposed a system in which rotation is applied to the steel bar by scooping it up with a receiving groove.

However, in the conventional method described above, after the moving rake has moved for one cycle, the traverser is moved to impart rotation to the steel bar, so even if the moving speed of the moving rake and traverser is increased, However, due to physical limitations, one cycle of the entire cycle takes a long time (therefore, there is a problem that it cannot be applied to large cooling beds, etc.).

(Unknown Prior Art) Therefore, in order to solve the above problem, the applicant of the present application proposed a rotary conveyance device for rolled material on a cooling bed in Japanese Patent Application No. 319671/1982.

The above device consists of a lift device that moves the receiving groove of the moving rake in the height direction, a shift device that moves the receiving groove of the moving rake in the conveyance direction separately from the lift device, and a vertical direction of the receiving groove of the moving rake. and/or the speed pattern of the receiving groove of the moving rake in the conveying direction, thereby rotating the rolled material by a desired angle in each cycle and conveying the rolled material.

FIG. 8 shows an example of a rotary conveyance operation pattern in the above-mentioned apparatus, and the movement path A shows the locus of the groove bottom of the receiving groove 6 of the moving rake 3. The shift device causes the groove bottom of the movable rake 3 to move backward in the conveying direction (direction S in the figure) from the rotary conveying operation reference point a located below on the vertical line passing through the center between the groove bottoms of the receiving grooves 5 of the fixed rake 2. The moving rake 3 is subjected to a series of horizontal movements such as reaching the retracted position at , then reaching the forward position C at the front in the transport direction, and then returning from y, SC to the reference point a. On the other hand, the lifting device applies a series of up-and-down movements to the movable rake 3 simultaneously with the horizontal movement, reciprocating between the base point a and the upper end position above the fixed rake 2. The combination of both movements causes the moving rake 3 to move along the path A.

At this time, since the groove bottom of the moving rake 3 passes between the groove bottoms of the pair of adjacent receiving grooves 5 of the fixed rake 2, the steel bar rolling from the receiving groove 5 of the fixed rake 2 by the receiving groove 6 of the moving rake 3 When lifting the material 1 and transferring the rolled material 1 to the receiving groove of the fixed rake 2 by the receiving groove 6 of the moving rake 3, the rolled material 1 can be rotated forward by a desired angle with respect to the conveying direction. By continuously performing this series of movements, the rolled material 1
is transported while rotating.

FIG. 9 shows an explanatory diagram for giving horizontal movement and vertical movement to the moving rake 3 by a shift device and a lift device, the moving rake 3 is attached to a frame 10a, and the frame 10a is attached to an eccentric cam provided on the lift device. Mechanism 13a
It moves up and down by a crank mechanism 20a provided in the shift device, and moves horizontally by a crank mechanism 20a provided in the shift device. 15a, 1
An eccentric cam 5b is fixed to the camshaft 14a and the crankshaft 21a, and its movement stroke is twice the distance between the axes of the camshaft 14a and the crankshaft 21a and the cam center. 22b is a connecting member, one end of which is connected to the frame 1.
0a, and the other end is pivotally connected to an eccentric cam 15b fixed to the crankshaft 21a. And each mechanism 13
When a and 20a are in a stable state, that is, as shown in FIG. 9, when the cam centers of the eccentric cams 15a and L5b are at the lower reference position on the vertical line passing through the rotation centers of the rotation shaft 14a and the crankshaft 21a, move to the base point a. The mounting position of the movable rake 3 is adjusted so that the groove bottoms of the rake 3 match.

The cam rotation shaft 14a and the crankshaft 21a
The series of vertical movements and horizontal movements are imparted to the moving rake 3 by one rotation of the movement rake 3 .

The cam rotation shaft 14a and the crankshaft 21a are connected to a lift device motor and a shift device motor via a deceleration transmission mechanism, and the rotational speed of these motors is set so as to give the moving rake 3 a desired movement pattern. The rotation is controlled by a control device.

Note that the crankshaft that converts rotational motion into reciprocating motion is not limited to the above-mentioned configuration, but may also be a bent-shaped crankshaft having an eccentric shaft portion at a position eccentric to the rotational axis, as will be described later. Of course it's a good thing.

According to the rotary conveyance device, the rolled material can be transported while being rotated, and the rolled material 1 on the receiving groove 5 of the fixed rake 2 can be kept on standby while being rotated in the receiving groove 5 (such operation is not possible). (referred to as idling).

FIG. 10 shows the motion pattern of the moving rake 3 during idling operation. To carry out such operation,
First, the movable rake 3 is moved from the base point a1 for rotational conveyance operation to the base point a2 for idling operation located below the groove bottom of the fixed rake 2 on a vertical line passing through the groove bottom. The reference point a2 for idling operation is the eccentric cam 15 of the shift device
It is determined by rotating b by 90 degrees. the result,
The center of the eccentric cam 15b is located on a horizontal line passing through the rotation axis of the crankshaft 21a.

After the moving rake 3 is set at the reference point a2 for idling operation, the eccentric cam 15a of the lift device is rotated to move the moving rake 3 upward while the shift device motor is stopped, and the moving rake 3 is moved upwardly. The rolled material 1 is loaded into the receiving groove 6 of the moving rake 3 and lifted. Thereafter, until the moving rake 3 reaches the upper end position d, the shift motor is rotated, the eccentric cam 15b of the crank mechanism 20a is rotated, and the moving rake 3 is moved horizontally by a distance of half a pitch or less. . When the moving rake 3 reaches the upper end position d, the shift device motor is stopped. Eccentric cam 1 of lift device
5a continues to rotate and lowers the moving rake 3,
The rolled material 1 is unloaded onto the oblique side of the receiving groove 5 of the fixed rake 2. Thereafter, the eccentric cam 15b of the lift device is rotated as it is to lower the movable rake 3, and the shift device motor is reversed to horizontally move the movable rake 3 toward the base point a2. During this time, the rolled material 1 unloaded onto the oblique side of the receiving groove 5 of the fixed rake 2 moves to the groove bottom while rotating as the moving rake 3 descends. (In the same figure, the solid line indicates the case where the rolled material 1 is rotated in the normal direction with respect to the conveyance direction S, and the broken line indicates the case where it is rotated in the reverse direction.) Each eccentric cam 15a, 1
5b returns to the reference position, and when the moving rake 3 returns to the base point a2, one cycle of operation ends. By repeating this operation, the rolled material 1 can be kept on standby while rotating on the receiving groove 5 of the fixed rake 2.

(Problem to be solved by the invention) When idling, the base point a of the mobile rake 3
2 is located at a position shifted by half a pitch in the horizontal direction from the base point a1 when performing the rotary conveyance operation.

In order to set the base point a2 at such a position, the eccentric cam 15b of the shift device must be rotated 90 degrees from the stable position determined by the base point a1, but this position is determined by the weight of the connecting member and the cam. is the maximum load on the crankshaft 21
This is the position where it acts on a, making the device unstable.

Furthermore, in order to perform idling operation, the shift device motor must be operated in forward and reverse directions, which requires a power source for reverse rotation, which also complicates the control circuit and increases equipment costs.

The present invention has been made in view of these problems, and provides an idling operation method in which the device is stable and does not require forward/reverse operation of the shift device motor.

(Means for Solving the Problem) As a means for solving the problem, the present invention provides that a cooling bed is formed by a fixed rake 2 and a movable rake 3, and the fixed rake 2 and the movable rake 3 are used for conveying rolled material. Receiving grooves 5 and 6, which are arranged in parallel in a direction perpendicular to the direction and are approximately square-shaped, are arranged at equal intervals in the conveying direction, and the movable rake 3 is made to move in a series in the height direction and in the conveying direction. Lifting the rolled material 1 on the receiving groove 5 of the fixed rake 2 by the receiving groove 6 of the moving rake 3 to the receiving groove in front of the receiving groove 5 of the fixed rake 2 in the transport direction;
145, the groove bottom of the movable rake 3 is located between the groove bottoms of the receiving grooves 5 of the fixed rake 2 and at the rear end position located rearward in the transport direction from the base point located below the groove bottoms, or at the front in the same direction. reaching one of the front end positions,
a shift device 20 equipped with a crank mechanism for applying a series of horizontal movements to the moving rake 3 from the one position to the other position and returning from the other position to the base point again by one revolution of the crankshaft; A lift device equipped with an eccentric cam mechanism for imparting to the movable rake 3 a series of upward and downward movements in which the groove bottom of the rake 3 reciprocates between the base point and an upper end position above the fixed rake 2 by one revolution of the camshaft. 13, and when the movable rake 3 is caused to perform a series of movements by simultaneously applying the horizontal movement by the shift device 20 and the vertical movement by the lift device 13 to the movable rake 3, the movable rake 3 is moved from the base point to the rear end position or While horizontally moving to the front end position, the rolled material on the receiving groove 5 of the fixed rake 2 is lifted by the receiving groove 6 of the moving rake 3 by upward movement from the base point to the upper end position, and then passes almost through the groove bottom of the fixed rake 2. The rolled material on the receiving groove 6 of the movable rake 3 is unloaded onto the receiving groove 5 of the fixed rake 2 by moving downward on the vertical line below the groove bottom of the fixed rake 2, and then moving horizontally and downward toward the base point, Further, the present invention is configured to move the moving rake 3 along a horizontal line passing through the base point to the forward end or backward position, and then return it to the base point.

(Function) The movable rake 3 performs a series of horizontal movements and vertical movements around a base point located between and below the groove bottoms of the receiving grooves 5 of the fixed rake 2.

By moving the movable rake 3 horizontally from the base point to the rear end position or the front end position and moving upward from the base point to the upper end position, the rolled material on the receiving groove 5 of the fixed rake 2 is rotated on the oblique side of the receiving groove 5. Load it into the receiving groove 6 of the moving rake 3 while
Lift it to the top position.

Subsequently, by moving the fixed rake 2 downward on a vertical line that almost passes through the groove bottom of the receiving groove 5 to below the groove bottom of the fixed rake 2, it is loaded into the receiving groove 6 of the movable rake 3 after being rotated by a predetermined angle. The rolled material can be unloaded into the receiving groove 5 of the fixed rake 2.

Next, by horizontally and downwardly moving toward the base point, the lift device completes a series of vertical movements with one revolution of the camshaft, and the shift device completes a series of horizontal movements with one revolution of the crankshaft.

By repeating such horizontal movement and vertical movement, the rolled material can be kept on standby while rotating on the receiving groove 5 of the fixed rake 2. At this time, the base point for idling operation can be rotated (it can be placed in the same position as the base point for general transport operation), so that the movable rake 3 can be operated stably, and the forward and reverse operation of the drive source for the shift device can be performed. No longer needed.

(Example) First, a rotary conveyance device for carrying out the present invention is shown in Figs.
This will be explained based on FIG.

A cooling bed for conveying or waiting at a fixed position while rotating the rolled material and cooling it with air during that time has fixed rakes 2 and moving rakes 3 for multiple destinations, and these fixed and moving rakes 2.3 are arranged in the conveying direction. A rake group 4 of the - group is formed by a pair of fixed rake 2 and a movable rake 3 located between the pair of fixed rake 2, which are arranged in parallel in a direction orthogonal to the .

The fixed and movable rakes 2.3 are both strip-shaped extending in the conveying direction, their upper ends are corrugated, and approximately square-shaped receiving grooves 5 and 6 for receiving the steel bar 1 are arranged equally in the conveying direction. They are formed continuously at intervals.

The fixed rake 2 is provided on a fixed frame 7, while the movable rake 3 is provided on a movable frame 8. The moving frame 8 has an upper frame 9 on the upper side that holds the moving rake 3 and a lower frame 10 on the lower side. It is being

Reference numeral 13 denotes a lift device that moves the receiving groove 6 of the moving rake 3 in the height direction via the moving frame 8, and has a pair of cam shafts 14 arranged in parallel in the conveyance direction.

The cam shafts 14 are disposed in a horizontal direction perpendicular to the conveyance direction, and a pair of eccentric cams 15 are provided at both ends of each cam shaft 14.
is fixedly installed, and a lower frame 10 of the movable frame 8 is placed on this eccentric cam 15 via rollers 16.

The camshaft 14 is driven by an electric motor 18 for a lift device via a deceleration transmission mechanism 17, whereby the eccentric cam 1
5, the receiving groove 6 of the moving rake 3 moves in the height direction via the roller 16 and the moving frame 8.

The reference position of the eccentric cam 15 is such that the cam center is located below the rotation center of the camshaft 14 on a vertical line passing through the rotation center. This is because, in this position, no torque is applied to the camshaft 14 due to the weight of the eccentric cam, the upper and lower frames, and the camshaft 14 is most stable.

20 is a shift device which moves the receiving groove 6 of the moving rake 3 in the conveyance direction separately from the lift device 13;
As shown in the figure, it has a crankshaft 21, which is arranged in the horizontal direction orthogonal to the conveyance direction at the rear of the moving frame 8 in the conveying direction, and is connected to the upper frame 9 of the moving frame 8. They are connected via a connecting member 22.

The reference position of the crankshaft 21 is such that the axis of the eccentric shaft portion 21A is located below the rotation center on a vertical line passing through the rotation center of the crankshaft 21. When in this position,
This is because the crankshaft 21 is stable because no torque is applied to the crankshaft 21 due to the weight of the connecting member 22, the eccentric shaft portion 21A, etc.

The crankshaft 21 is driven by a shift device electric motor 24 via a deceleration transmission mechanism 23, whereby the receiving groove 6 of the moving rake 3 moves in the conveyance direction via the connecting member 22 and the moving frame 8.

A control device 26 controls the electric motors 18 and 24 for the lift device and the shift device.

A guide plate 28 is connected to the cooling bed on the front side in the transport direction.

Next, an idling operation method using the rotary conveyance device will be explained.

Figure 5 shows moving rake 3 when idling.
The movement pattern of the groove bottom of the receiving groove 6 is shown, and the numbers attached to the movement path B of the groove bottom indicate the order of movement.
By moving around the path B, one cycle of movement is performed. a indicates a base point, and when the eccentric cam 15 and the crankshaft 21 are at the reference position, the groove bottom of the movable rake 3 is located at the base point a. Further, the amount of movement of the receiving groove 6 of the moving rake 3 in the conveying direction is the amount of movement of the receiving groove 6 of the fixed moving rake 2, 3.
．． The spacing is the same as 1 pitch in 6.

To perform idling operation according to the motion path B,
First, while moving the moving rake 3 horizontally backward in the transport direction S from the base point a using the shift device 20, the lift device 13
The fixed rake 2 is caused to move upward by the angle 2, and is moved so as to intersect with the oblique side of the receiving groove 5 of the fixed rake 2.

At this time, the rolled material 1 on the receiving groove 5 of the fixed rake 2 is transferred and lifted onto the receiving groove 6 of the movable rake 3 on the oblique side of the receiving groove 5 while rotating normally with respect to the conveying direction S.

Then, after the movable rake 3 reaches the upper end position d while continuing its backward horizontal movement in the transport direction S, it is moved downward so as to pass through the groove bottom of the receiving groove 5 of the fixed rake 2. At this time, the rolled material (2) on the moving rake 3 is transferred to the receiving groove 5 of the fixed rake 2 in a non-rotating state. Therefore, it is placed on the receiving groove 5 again in a state rotated forward by a certain angle with respect to the initial state. Thereafter, the moving rake 3 is lowered and horizontally moved toward the base point a. When the movable rake 3 returns to the base point a, the movable rake 3 is further reciprocated to the front end position located forward in the conveyance direction S, and returned to the base point a, while the lift device remains inactive.

In order to give the moving rake 3 a series of movements along the movement path B, the electric motors 18 and 24 of the lift device 13 and the shift device 20 are controlled as shown in FIGS. 6 and 7. The numbers attached to each graph correspond to the numbers of motion path B in FIG.

As shown in FIGS. 6 and 7, each of the electric motors 18 and 24 of the lift device 13 and the shift device 20 is operated only in one direction for a cycle of approximately 8 seconds, and
Acceleration and deceleration are performed once when the rolled material 1 is not cut on the receiving groove 6.

That is, the electric motor 18 of the lift device 13 has the number 1
After being accelerated for 0.8 seconds until just before ~3 (immediately before loading moving rake 3), it was operated at a constant speed of 600 rpm until the middle of numbers 5 and 6 (immediately after unloading to fixed rake 2), and then decelerated. It is stopped at 9. Just before stopping, it rotates at a very low speed (
creep operation) to improve stopping accuracy.

On the other hand, the electric motor 24 of the shift device 20 is accelerated from the base point a to number 2, rotated at a constant speed of 180 rpm, decelerated and creep-operated, and then stopped at the base point a.

By repeatedly moving the movable rake 3 along the movement path B, the rolled material 1 can be rotated without being conveyed on the receiving groove 5 of the fixed rake 2.

Incidentally, the motion path during idling is not limited to the above-mentioned path, but may be a movement path that is opposite to path B with respect to the vertical line passing through base point a. Furthermore, after passing the groove bottom of the fixed rake 2, the mobile rake 3 moves to the fifth
Regardless of the routes numbered 6 to 10 in the figure, it is sufficient to descend to the base point a (any position on the horizontal line passing through a) before the shift device completes one cycle of operation.

According to this embodiment, the intended idling operation can be performed without operating the motor 24 of the shift device 20 in forward and reverse directions, and the same position as the reference point for the rotary conveyance operation can be used as the base point. When there is no rolled material in the groove,
Since the moving speed of the receiving groove of the moving rake is accelerated or decelerated, there is no need for the driving source of the lift device or the shift device to have a large horsepower.

Furthermore, since the moving speed of the receiving groove of the moving rake is accelerated or decelerated once per cycle, no stress is placed on the lift device or shift device, and these devices can have a long life.

(Effects of the Invention) As explained above, according to the method of the present invention, the base point for idling operation is set between and below the groove bottoms of the receiving grooves 5 of the fixed rake 2. The base point can be set in common with the base point, and this base point can be set at a mechanically stable position of the lift device and shift device, so the stability of the device can be increased and the moving rake can be operated stably. can.

In addition, the moving rake provides a predetermined movement path for idling operation through a series of horizontal movements and vertical movements made by one revolution of the camshaft and crankshaft of the lift device and shift device, so the drive source of the lift device can be corrected. There is no need for reverse control, and control costs can be reduced.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of a rotary conveyance device for carrying out the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a sectional view taken along the line ■-■ of Fig. 1, and Fig. 4 is a 5 is a movement path diagram of the moving rake during idling operation according to the embodiment; FIG. 6 is a diagram of the operation procedure of the electric motor for the lift device during idling operation in FIG. 5; FIG. 7 is a diagram of the operation procedure of the electric motor for the shift device during the same operation, FIG. 8 is a diagram of the movement path of the moving rake in the rotary conveyance operation, FIG. 9 is an explanatory diagram of the driving procedure of the movable rake of the rotary conveyance device, Figure 1O is a motion path diagram of a moving rake during conventional idling operation. 2-fixed rake, 3-movable rake, 5.6-receiving groove, 13
- lift device, 14- camshaft, 2o- shift device, 21- crankshaft. Fig. 1 O Fig. Fig. 1.

Claims (1)

[Claims] (1) A cooling bed is formed by a fixed rake (2) and a moving rake (3), the fixed rake (2) and the moving rake (3) are arranged in parallel in a direction perpendicular to the conveying direction of the rolled material, and Approximately V-shaped receiving grooves (5) and (6) are arranged in rows at equal intervals in the conveying direction, and the movable rake (3) is made to move in a series of directions in the height direction and in the conveying direction. Receiving groove (6)
Rolled material (1) on receiving groove (5) of fixed rake (2)
In the case where the movable rake (3) is lifted and transferred onto the receiving groove (5) which is forward of the receiving groove (5) of the fixed rake (2) in the transport direction, the bottom of the groove of the movable rake (3) is connected to the receiving groove (5) of the fixed rake (2). groove(
5) from the base point located between and below the groove bottoms to either the rear end position located at the rear in the conveyance direction or the front end position located at the front in the same direction, and from the one position to the other position. The movement rake (
3) A shift device (with a crank mechanism for providing
20), and the groove bottom of the movable rake (3) is connected to the base point and the fixed rake (2).
) is provided with a lift device (13) equipped with an eccentric cam mechanism for giving the moving rake (3) a series of lifting and lowering movements by one revolution of the camshaft, reciprocating between the upper end position located above the shifter. Horizontal movement and lifting device (20)
13) is applied to the movable rake (3) at the same time to make the movable rake (3) perform a series of movements, while the movable rake (3) is horizontally moved from the base point to the rear end position or the front end position. The rolling material on the receiving groove (5) of the fixed rake (2) is moved by moving the rake (
The receiving groove (6) of the movable rake (3) is then lifted up by the receiving groove (6) of the movable rake (3), and then the receiving groove (
6) A method of rotating a rolled material in a cooling bed, characterized by unloading the upper rolled material onto the receiving groove (5) of the fixed rake (2), then moving it horizontally and downward toward the base point, and returning it to the base point. .