JP2899223B2 - Cooling floor for steel bars - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling floor for steel bars.
The steel bar rolled by the rolling mill is cut to a predetermined product length, cooled to a normal temperature in a cooling floor, and then straightened by a straightening machine to give straightness. The present invention relates to the cooling floor described above. In addition, in this specification, a steel bar is a round steel, a square steel,
A bar-shaped steel material such as hexagonal steel, octagonal steel, flat steel, and semi-round steel.

[0002]

2. Description of the Related Art Conventional cooling floors for steel bars include a chain transfer system and a walking beam system. The chain transfer method is disclosed in Japanese Utility Model Laid-Open No. 3-116205 and Japanese Patent Publication No. 4-72887. These cooling floors are configured to cool the material by the spray device while traversing the material on the progressive chain conveyor, and run in the opposite direction to the progressive chain to rotate the material being traversed. A chain conveyor for reverse feed is provided. By rotating the material with this reverse chain conveyor, the material is uniformly cooled to prevent bending of the steel bar.
The walking beam method is described in, for example, the new edition of Mechanical Engineering Handbook C.
3-There is a machine described on page 125, which comprises a stationary skid and a moving beam, and the material is moved on the stationary skid by raising and lowering and traveling of the moving beam. As a mechanism for lifting and running, a hydraulic cylinder, a link mechanism, an electric eccentric cam, and the like are used.
It is usually installed on the underside of the moving beam.

[0003]

In a mill line, both round steel and square steel are produced, so that it may be necessary to mix and cool round steel and square steel. In the conventional chain transfer type cooling floor, when round steel and square steel are mixedly transported, rotation cooling of the material is not taken into account, and either one of them is transported. And although rotary feed of a round steel is possible, square steel has a problem that it becomes a sliding feed and surface flaws are formed. Further, in the conventional walking beam type cooling floor, it is possible to load mixed round steel and square steel, but sufficient rotary cooling of round steel is not possible with mixed square steel, and the machine below the pass level upper surface of the apparatus is not allowed. When the parts are large and the height of the machine is high and the base level is limited, there is a problem that the pass level cannot be reduced freely.

In view of the above circumstances, the present invention is capable of carrying round steel and square steel mixedly, in addition to carrying only round steel and carrying square steel only, round steel can be constantly rotated and cooled, and square steel can be slid and fed. It is an object of the present invention to provide a cooling bar for steel bars which can carry a load, and can make the mechanical device below the upper surface of the pass level compact and can easily lower the pass level.

[0005]

According to the first aspect of the present invention, a chain conveyor for forward feeding and a chain conveyor for reverse feeding are arranged side by side.
A chain with a top plate, wherein a high top link having a high top plate height and a low top link having a low top plate height are alternately connected at a predetermined pitch. The upper surface height of the high top link is higher than the upper surface of the reverse chain conveyor, and the upper surface height of the lower top link of the progressive chain conveyor is set lower than the upper surface of the reverse chain conveyor. And The invention according to claim 2 is characterized in that a fixed rail having the same upper surface height is used instead of the reverse chain conveyor. The invention according to claim 3 is characterized in that an idler roller is rotatably supported on the pushing side end of the high top link of the progressive chain conveyor. is there.
According to a fourth aspect of the present invention, a drive motor mounted on a drive shaft of a sprocket of a progressive chain conveyor, a rotational position detector for detecting a rotational position matching the number of teeth of the sprocket, and a rotational position detector A controller for taking in a rotational position signal to be output and a command signal from the input unit, and controlling a rotational operation of the drive motor, wherein at a fixed position on the inlet side of the cooling floor, the low top link of the progressive chain conveyor is provided. A first transport pattern in which the top stop is sequentially stopped and pitch-fed, a second transport pattern in which the high top link is sequentially stopped and pitch-fed, and a third transport pattern in which the low ton link and the high top link are stopped and pitch-fed alternately Arbitrarily,
This is a preferred embodiment of the first and second aspects of the present invention.

[0006]

According to the first aspect of the present invention, a square steel is loaded on the top plate of the high top link of the progressive chain conveyor,
The steel is traversed by placing the round bar on the top plate of the low top link. Since the square steel is located above the upper surface of the reverse feed chain, the square steel is conveyed while being mounted on the top plate, and can be stacked and conveyed without rubbing friction. The round steel is pushed and transported at the end of the high top link, but the upper surface of the reverse chain conveyor is higher than the upper surface of the lower top link, so the reverse chain runs in contact with the lower surface of the round steel. By doing so, the round bar is cooled while rotating, and bending due to uneven cooling is prevented. In addition, since the main component is a chain conveyor, the configuration of the apparatus below the pass level is compact, and it is easy to lower the pass level. According to the invention of claim 2, the round bar is rotated by friction with the fixed rail. However, during the stop time of the pitch feed of the chain conveyor for progressive feeding, the round bar does not rotate, so it rotates intermittently, but the stop time is short compared to the transfer time, and even this cooling is uniform, preventing bending Is enough to do. According to the third aspect of the present invention, the round bar rotated by the reverse feed chain is in contact with the rotatable idler roller, so that it does not come into contact with the high-top-link component member to damage the surface. According to the fourth aspect of the present invention, in the first transport pattern, only the low top link of the progressive chain conveyor stops at the fixed position on the entry side, so that it is suitable for transporting only round steel. In the second transport pattern, the high top links of the progressive chain conveyor are sequentially stopped at the fixed position on the entry side, and thus are suitable for transporting only square steel. In the third transfer pattern, the low top link and the high top link stop alternately, so that it is suitable for a mixture of round steel and square steel.

[0007]

Next, embodiments of the present invention will be described with reference to the drawings. First, the overall structure of an embodiment of the present invention will be described with reference to FIG. FIG. 4 is a schematic plan view of a cooling floor for steel bars. In the figure, 1 is a chain conveyor for forward feeding, 2 is a chain conveyor for reverse feeding, and these are alternately installed one by one. The number of the chain conveyors 1 and 2 is not particularly limited, and an appropriate number is installed according to the length of the steel bars a and b to be conveyed. The progressive chain conveyor 1 has a progressive chain 10 connected endlessly and wound around a driving sprocket 11 and a driven sprocket 12.
The drive shaft 15 supporting the drive motor 15
Are combined. In addition, the reverse feed chain conveyor 2 connects the reverse feed chain 20 endlessly and is wound around a driving sprocket 21 and a driven sprocket 22. Drive motor 25 is connected. The progressive chain conveyor 1 travels in the feed direction of the steel bars a and b (arrow F direction) to convey the steel bars a and b, and the reverse feed chain conveyor travels in the opposite direction (arrow R direction) to the feed direction. As described later, a rotational force is applied to the round bar a.

FIG. 1 is a side view of a progressive chain 10, FIG. 2 is a front sectional view of a progressive chain 10 and a reverse chain 20, and FIG. 3 is a high top link 3 and a low top of the progressive chain 10. FIG. 4 is a plan view of a link 4. Progressive chain shown in Figs.
10 uses a link with a top plate and 3
a high top link 3 with a high height a and a top plate 4
The low top link 4 having a low height a is connected at a predetermined pitch. In the illustrated embodiment, the same link is connected two by two. However, if the diameter of the steel bars a and b is small, the high top link 3 and the low top link 4 may be connected alternately one by one. If the diameter of the steel bars a and b is large, three or more of the same links may be connected. Further, not only the number of links connected but also the length of the links may be changed. Such numbers and dimensions may be arbitrarily selected according to the steel bar to be conveyed.

In FIGS. 1 and 2, reference numeral 2a denotes an upper surface level of the chain conveyor 2 for reverse feeding. The upper surface of the top plate 3a of the high top link 3 of the progressive chain 10 is higher than the upper surface 2a of the reverse chain conveyor 2, and the upper surface of the top plate 4a of the low top link 4 is lower than the upper surface 2a of the reverse chain conveyor 2. It is set to be. As shown in FIGS. 1 and 3, an idler roller 6 is rotatably supported at the pushing end of the high top link 3.

The reverse chain 20 may be an ordinary chain, but it is preferable to use a chain with a top plate for transporting a high-temperature material. It is preferable that both the forward-feeding chain 10 and the reverse-feeding chain 20 be roller chains with the rolling rollers 5 in order to reduce sliding friction at the time of transport. However, a block chain without rollers may be used. As shown in FIG. 2, the roller 5 runs while rolling on a support beam 7 made of H-section steel or the like.

As shown in FIG. 1, in this embodiment, a square steel b is loaded on the top plate 3a of the high top link 3,
Place the round steel a on the low top link 4 and
The round steel a is pushed and transported at the end of. At this time, since the square steel b is loaded and conveyed and does not come into contact with other members, no frictional resistance is generated and no surface flaw is caused. In addition, the reverse feeding chain 20 that is in contact with the bottom of the round bar a moves in the transport direction (the direction of arrow F).
Traveling in the opposite direction (the direction of arrow R)
Is pushed while rotating and moves. Therefore, it is uniformly cooled and does not bend. Since the rotating round bar a is in rotational contact with the idler roller 6 at the pushing end of the high top link 3, the frictional resistance does not increase and the surface of the round bar a is not damaged.

Next, the overall structure of the above embodiment is shown in FIGS.
It will be described based on. FIG. 5 is a side view of the cooling floor shown in FIG. 4,
FIG. 6 is a side view of the driving sprocket 11. In FIG. 5, an appropriate transfer device 30 is provided on the entrance side of the cooling floor, and the bar bars a and b cut to a predetermined length are carried into the entrance side fixed position of the cooling floor. Chain conveyor for progressive feeding 1
As shown in FIG. 6, a drive sprocket 11 having an even number of teeth 11a is used. As shown in FIG. 4, a rotation position detector 16 is attached to one end of the drive shaft 13 of the drive sprocket 11. The rotational position detector 16 is provided with the drive sprocket.
This is a detector that detects the rotational position that matches the number of 11 teeth.

A controller (not shown) is provided. The controller receives a detection signal of the rotational position detector and a command signal from an input section, and issues a control signal to the drive motor 15. The input unit is configured to instruct a first transport pattern, a second transport pattern, and a third transport pattern.
The transport pattern is an operation in which the low top link 4 is sequentially stopped at the fixed position on the entry side to feed the pitch, the second transport pattern is an operation in which the high top link 3 is sequentially stopped at the fixed position on the entry side to feed the pitch, and the third transfer pattern. Is an operation in which the low top link 4 and the high top link 3 are stopped alternately to feed the pitch.

Therefore, in the present embodiment, when the first transport pattern is commanded, the driving sprocket 11 feeds two pitches, the low top link 4 stops at the fixed position on the entry side, and the round bar a is placed on the low top link 4. It can be positioned and transported. When the second transport pattern is commanded,
The drive sprocket 11 feeds at two pitches, the high top link 3 stops at the entrance fixed position, and the square steel b can be placed on the high top link 3 and transported. Further, when the third transport pattern is commanded, the drive sprocket 11 feeds one pitch, the low top link 4 and the high top link 3 alternately stop at the entry side fixed position, and the round steel a and the square steel b are mixed. Can be transported. Note that flat steel, semi-round steel, and hexagonal steel may be loaded and transported with the high top link 3 in the same manner as the square steel b. Polygonal steel such as octagonal steel may be rotatably conveyed while being positioned at the low top link 4 similarly to the round steel a.

Next, another embodiment of the present invention will be described.
In the above embodiment, the chain conveyor 2 for reverse feed was used.
Alternatively, fixed rails may be used. Of course, the height of the upper surface must be the same level as that of the chain conveyor 2 for reverse feeding. In the above embodiment, the chain conveyor 1 for progressive feeding is used.
Although the chain conveyor 2 for reverse feed always travels even if it is pitch-fed, the round steel a always rotates, but in this embodiment, the round steel a is rotated only while being pushed by the chain conveyor 1 for progressive feed. The steel a will rotate. In other words, the intermittent rotation occurs, but such intermittent rotation is sufficient to prevent the cooling of the round bar a to be uneven.

In each of the above embodiments, the main components are the chain conveyors 1 and 2, so that the structure below the pass level of the cooling floor is compact, and the pass level can be easily lowered. Furthermore, in order to secure the position of the round bar during transport (so that the round bar does not roll freely when the forward transport is stopped), the upper surface of the forward / reverse chain 10, 20 is inclined upwards in the transport direction. It is also possible to make a slight angle.

[0017]

According to the present invention, in addition to the transfer of only the round steel and the transfer of only the square steel, mixed transfer of the round steel and the square steel is possible, the round steel can be constantly cooled, and the square steel can be slid. Instead, it is possible to provide a cooling floor for steel bars, which can carry and convey a load, and can make the machinery below the upper surface of the pass level compact and can easily lower the pass level.

[Brief description of the drawings]

FIG. 1 is a side view of a progressive chain 10. FIG.

FIG. 2 is a front cross-sectional view of a forward feed chain 10 and a reverse feed chain 20.

FIG. 3 is a plan view of a high top link 3 and a low top link 4 of the progressive chain 10.

FIG. 4 is a schematic plan view of a cooling floor for steel bars.

FIG. 5 is a side view of the cooling floor shown in FIG. 4;

6 is a side view of the driving sprocket 11. FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Progressive chain conveyor 2 Reverse feed chain conveyor 3 High top link 4 Low top link 5 Roller 6 Idler roller 10 Progressive feed chain 11 Drive sprocket 15 Drive motor 16 Rotational position detector 20 Reverse feed chain

Continuation of the front page (56) References JP-A 3-116205 (JP, U) JP-A 56-142805 (JP, U) JP-A 3-116205 (JP, U) JP 4-72887 (JP) , B2) (58) Fields investigated (Int. Cl. ⁶ , DB name) B21B 43/00-43/12 B21B 39/00 B65G 17/22 C21D 9/00

Claims (4)

(57) [Claims] 1. A chain conveyor for forward feeding and a chain conveyor for reverse feeding are arranged side by side, wherein the chain of the chain feeding conveyor is a chain with a top plate,
A high top link having a high top plate height and a low top link having a low top plate height are alternately connected at a predetermined pitch, and the top height of the high top link of the progressive chain conveyor is reduced. A cooling floor for steel bars, wherein the cooling floor is set higher than the upper surface of the chain conveyor for reverse feeding, and the upper surface of the lower top link of the chain conveyor for progressive feeding is set lower than the upper surface of the chain conveyor for reverse feeding. 2. The steel bar cooling floor according to claim 1, wherein a fixed rail having the same upper surface height is used in place of the reverse conveyor. 3. The cooling floor for steel bars according to claim 1, wherein an idler roller is rotatably supported at a pushing end of the high top link of the progressive chain conveyor. 4. A drive motor mounted on a drive shaft of a sprocket of the progressive chain conveyor, a rotational position detector for detecting a rotational position matching the number of teeth of the sprocket, and an output of the rotational position detector. And a controller for controlling the rotation operation of the drive motor, and a low-top link of the progressive chain conveyor is sequentially placed at the fixed position on the inlet side of the cooling floor. A first transport pattern that stops and pitch-feeds, a second transport pattern in which high top links stop sequentially and pitch-feeds, and a third transport pattern in which low-top links and high top links stop and pitch-feed alternately. Arbitrarily select,
The cooling floor for steel bars according to claim 1 or 2, wherein the cooling floor is executed.