JP5141139B2 - Cooling floor - Google Patents

Description

  The present invention is a cooling bed capable of rotating and cooling a round bar or cylindrical material without fear of causing pitch deviation and conveyance flaws, and greatly simplifying a conveyance machine and efficiently and uniformly cooling it. About.

It is known to equip a cooling floor with a walking beam type or chain type conveying device.
The walking beam type conveyance device includes a fixed skid and a moving beam, and moves the material on the fixed skid by moving the moving beam up and down. As a mechanism for raising and lowering and traveling, a hydraulic cylinder, a link mechanism, an electric eccentric cam, and the like are used and are usually installed on the lower surface of the moving beam. This transfer facility requires a large amount of transfer machines and is expensive. Further, when a round steel pipe or steel bar is rotationally cooled, there is a risk of pitch deviation and conveyance scratches, so it is said that it is not suitable for a water-cooled material that is likely to be bent.

  On the other hand, the cooling floor provided with the chain type conveying device is a type in which the conveying chain is driven by a drive motor, so that the conveying machine can be simplified as compared with the walking beam type. According to this cooling bed, after the material is placed on the transport chain, the transport chain is run, and the material is water-cooled by a spray device according to the cooling condition, or the material is forcibly air-cooled by a fan or the like. Can be allowed to cool.

There are two types of chain-type transfer devices that use only one type of transfer chain and those that use two types of chains.
The former transport device using one type of chain is typically a chain with a top roller configured to run on a rail, and a cooling floor having only this has the following drawbacks.

  (1) When used in a cooling floor that conveys a round steel pipe or steel bar while cooling it, it is difficult to achieve uniform cooling due to the slow rotation of the steel pipe or steel bar relative to the forced air cooling material. (2) On the other hand, when trying to achieve uniform cooling with respect to a natural cooling material, a long cooling bed is required. In other words, since the position of the material moves in the direction of rolling by the amount of rolling of the material such as the steel pipe or the steel bar, it is necessary to install a cooling bed having a length corresponding to the product of the rotation speed and the circumference of the material. . (3) Further, when the bending of the water-cooled material becomes large, there is a possibility that a conveyance flaw caused by contact between the material and the chain may occur due to rolling failure.

On the other hand, the chain type transport device using the latter two types of chains can be a cooling bed capable of rotating and cooling the material (Patent Document 1).
A chain-type transport device disclosed in Patent Document 1 is shown in FIGS. FIG. 7 is a side view showing the structure of a transfer chain provided in a conventional cooling floor, and FIG. 8 is a front sectional view of FIG.
The chain-type transport device disclosed in Patent Document 1 includes a transport chain 21 that travels in the transport direction F and a reverse-feed chain 20 that travels in the feed direction R with materials W ₁ and W ₂ alternately placed thereon. It is arranged in parallel.

  In this case, the conveying chain 21 is a chain with a top plate in which links 22 having a high height and links 23 having a low height are alternately connected at a predetermined pitch, and The upper surface height is set higher than the link upper surface 20a of the reverse feed chain 20, and the lower surface height of the lower link 23 is set lower than the upper surface 20a. An idler roller 25 is rotatably supported on the push side end of the high link 22. In FIG. 8, the rolling roller 24 is a roller that rolls on a support beam 26 made of H-section steel or the like.

Accordingly, the round steel W ₁ is placed on the upper surface 20a of the reverse feed chain 20 and is inserted in the transfer direction by the idle roller 25 provided on the high link 22 of the transfer chain 21, so that the reverse feed chain 20 while the round bar W ₁ is rotated at all times, it can be conveyed round steel W ₁ in the transport chain. On the other hand, the height placed on higher top plate corner steel W ₂ can load transport.
JP-A-8-174037

However, the chain-type conveying device disclosed in Patent Document 1 can efficiently cool the round steel W ₁ and the square steel W _{2 when} they are mixed and conveyed simultaneously, but when applied to a cooling floor dedicated to round steel. , it is impossible to rotate cooled to arranged positions of corner steel W ₂ by placing the steel pipe round shape with a predetermined pitch.
In other words, when a round round steel bar is placed on the top plate with a higher height and cooled while being transported by the transport chain, the round steel rolls, which may cause pitch deviation and transport scratches. If pitch deviation occurs, uniform cooling cannot be achieved. Further, since the traveling direction of the transport chain and that of the reverse feed chain are opposite to each other, the transport machine, that is, the chain drive system is also complicated.

  The present invention eliminates the above-mentioned problems of the prior art, can rotate and cool a round steel pipe without fear of pitch deviation and conveyance flaws, can greatly simplify the conveyance machine and efficiently make the steel pipe efficient. It aims at providing the cooling bed for steel pipes which can be cooled uniformly.

  That is, the present inventors have intensively studied, a first chain with a top plate capable of continuously loading round steel and a first chain for imparting rotational force, and a conveying direction of the round steel placed on the first chain. A chain-type transport device using two types of chains of a second chain with a top roller having a disc-shaped top roller that regulates the spacing for each pitch, and the first chain with a top plate and the top roller And a switching means for driving only the first chain with the top plate in the conveying direction with the second chain with the top roller being in a stopped state. Thus, the present invention has been made based on the knowledge that the above problems can be solved.

That is, the present invention is as follows.
1. In a cooling bed provided with a chain-type transport device in which a plurality of chains are arranged in parallel in the longitudinal direction of a round bar or cylindrical material, a top plate is provided on the link plate, and the top plate continuously feeds the material. A first chain constituting a loading surface that can be loaded on the second chain, and a second chain having a link plate provided with a top roller protruding above the loading surface at a predetermined interval in the longitudinal direction of the chain; Are arranged in the transport direction, and the chain drive mechanism can drive the first chain and the second chain in the same direction at the same speed, and the synchronized driving state. A cooling bed comprising switching means capable of switching to an operating state in which the second chain is stopped and the first chain is driven.
2. The drive mechanism includes a sprocket that matches both side ends of the first chain and the second chain, a sprocket that matches at least one side end of the first chain, and at least one side end of the second chain. A drive motor for driving the matched sprocket via a drive shaft; and a clutch for switching transmission / non-transmission of the driving force from the drive motor to the driving sprocket of the second chain as the switching means. The cooling bed according to claim 1.
3. The first chain and the second chain are arranged so as to be inclined so that positions of the stacking surface and the top roller become higher toward the downstream side in the transport direction. The cooling bed according to 2.

According to the cooling bed of the present invention, it is possible to rotate and cool a round bar or cylindrical material without fear of pitch deviation and conveyance scratches, and to greatly simplify and efficiently perform uniform cooling of a conveyance machine. Is possible.
As a result, the following can be achieved.
(1) The air-cooled material can be rotationally cooled at an arbitrary speed, and no bending occurs even when forced air-cooling is performed. (2) The water-cooled material can be efficiently and uniformly cooled while being reliably conveyed even if there is some bending. (3) Compared with the walking beam type transfer device, the transfer machine is simple and the equipment cost is low.

Hereinafter, the cooling bed according to the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing a chain type conveying device provided in a cooling floor, and FIG. 2 is a YY sectional view of FIG. FIG. 3 is a plan view showing a preferred chain drive mechanism provided in the cooling floor 10.
As shown in FIG. 3, the cooling bed 10 according to the present invention preferably includes a plurality of two types of chains 1 and 2 arranged alternately in the longitudinal direction of the pipe.

As shown in FIG. 1, one of the two types of chains is a top plate-attached chain (first chain) 2 having a top plate 2a constituting a loading surface on each link plate 2b. This chain is a chain with a top roller (second chain) 1 having a top roller 3.
In the first chain 2, a top plate 2a is fixed to each link plate 2b, and a material W can be continuously stacked on the top plate 2a. The top plate 2a of the first chain 2 is fixed to each link plate 2b and forms a plate outer surface that comes into contact with a round bar or a cylindrical material W, and this plate outer surface serves as a loading surface.

Here, the top roller 3 of the chain with the top roller (second chain) 1 regulates the conveyance direction interval of the material W placed on the first chain 2 for each predetermined pitch p. As shown in FIGS. 1 and 3, the pitch p is defined by a conveyance direction distance between the rotation centers 3 a of the disk-shaped rollers 3. F in FIGS. 1 and 3 indicates the conveyance direction of the material W.
The top roller 3 of the second chain 1 is rotatably attached to each link plate 1b via a bearing member 1a so as to protrude above the outer surface of the plate of the first chain 2. The second chain itself (link plate 1b) is arranged to be positioned below the outer surface of the top plate 2a at each position in the transport direction.

Thus, the second chain 1 having the top roller 3 that regulates the conveyance direction interval of the material W placed on the conveyance chain 2 for each pitch p, and the first with a top plate on which the material W can be continuously loaded. According to the cooling bed 10 in which a plurality of chains 2 are alternately arranged in the longitudinal direction of the material W, the following pattern operation can be performed.
(1) Operation of the first pattern: When the material W is not conveyed but is rotated and cooled while being held within one pitch, the operation of the first pattern is performed to the second chain 1 with a top roller by a clutch mechanism described later. The rotation from the drive motor is not transmitted, the rotation from the drive motor is transmitted only to the first chain 2, and only the first chain 2 travels in the transport direction F.

  According to such operation of the first pattern, the material W placed on the top plate 2a of the first chain 2 is caused by the disk-shaped roller 3 provided on the second chain as shown in FIG. The movement in the transport direction is restricted within the pitch p. Accordingly, the material W is not transported in the transport direction F, but rolls on the top plate 2a moving in the transport direction F. Here, the pitch p may be appropriately determined according to the diameter of the material to be processed in the cooling bed, and may be set larger than the maximum diameter of the materials to be processed. Therefore, it is not always necessary to provide the top rollers 3 for all the link plates 1b of the second chain 1, and the top rollers may be provided on the necessary link plates 1b so as to obtain the necessary pitch p.

Thereby, the effect of rotating and cooling can be exhibited while the material W is not conveyed but held within one pitch.
Note that, as the traveling speed of the first chain 2 increases, the peripheral speed of the material W increases accordingly, so that the rotational speed of the material W can be adjusted in addition to the above-described effects by the operation of the first pattern.
(2) Operation of the second pattern: When transporting the material W while keeping it within one pitch without rotating it The operation of the second pattern is driven to the second chain 1 with the top roller by the clutch mechanism. Rotation is transmitted and the two types of chains 1 and 2 are caused to travel in the transport direction F at the same traveling speed. This operation of the second pattern is also referred to as synchronous operation of the two types of chains 1 and 2.

That is, when the two types of chains 1 and 2 are operated synchronously, the traveling speed of the first chain 2 with the material W placed on the top plate 2a and the traveling speed of the second chain 1 with the top roller are The speed difference is zero.
For this reason, a force that moves in the transport direction F acts on the bottom of the material W that is received in contact with the disk-shaped roller 3, and pushes the material W in the transport direction F from the disk-shaped roller 3 on the non-transport side External force acts.

Therefore, the effect of transporting the material W while keeping it within one pitch without rotating the material W by the operation of the second pattern can be exhibited.
The above effects are used in combination according to the cooling conditions of the material.
(1) For the air cooling material (forced air cooling: when the material is air cooled by a fan or the like, natural cooling: when the material is air cooled only by rotational cooling), the operations of the first and second patterns are combined. At that time, when the operation of the first pattern is performed for a predetermined time, the rotation speed of the material W is adjusted at the same time. Further, the second pattern operation is performed every cycle time.

(2) For the water-cooled material, the first and second patterns are used in combination. At that time, in the operation of the first pattern, the rotational speed of the material W is also adjusted according to the cooling condition of the material.
As shown in FIG. 4, the first chain and the second chain are inclined toward the downstream side in the transport direction F so that the positions of the loading surface (plate outer surface) and the top roller are higher. Are preferably arranged. In FIG. 4, θ represents the inclination angle of the outer surface of the plate with respect to the horizontal plane.

  In the example shown in FIG. 1, the first chain and the second chain are arranged so that the arrangement of the loading surface and the top roller is horizontal, but in this case, the material W is free within the pitch P. In particular, during the operation of the second pattern, it is easy to repeat the collision / separation with the top roller by reciprocating between the top roller on the upstream side and the top roller on the downstream side. Wrinkles are likely to occur. Further, during the operation of the first pattern, that is, when only the first chain 2 is traveling in the transport direction F, the material W is always kept along with the traveling of the loading surface as shown in FIG. At this time, if the traveling speed of the first chain 2 is increased, the contact pressure to the top roller on the downstream side increases, and the surface of the material W is wrinkled. It is also easy to generate.

  On the other hand, as shown in FIG. 4, the first chain and the second chain are inclined toward the downstream side in the transport direction F so that the positions of the stacking surface (plate outer surface) and the top roller are higher. Then, the material W comes into contact with the top roller on the upstream side in both the operation of the first pattern and the operation of the second pattern. Therefore, repeated contact / separation between the upstream top roller and the downstream top roller can be prevented, and even if the traveling speed of the first chain 2 is increased during the operation of the first pattern, the top roller The contact pressure on the material W is not increased, and the generation of wrinkles on the material W can be suppressed.

Next, a chain drive mechanism having switching means that can be switched to the first and second pattern operations described above will be described with reference to FIGS. 3, 5, and 6. In FIG. 3, 4 is a drive motor, and 5 is a drive shaft connected to the drive motor. 6 and 7 are drive side sprockets, and 8 and 9 are driven side sprockets.
The chain drive mechanism for rotating the sprockets matching the above-described two types of chains 1 and 2 by the drive motor 4 is as follows. A drive shaft 5 connected to the drive motor 4 is disposed through the centers of the drive side sprockets 6 and 7 (see FIGS. 3 and 5), and the drive side sprocket 7 of the first chain 2 is The drive side sprocket 6 of the second chain 1 with a top roller is fixed to the drive shaft 5 with a key, and is attached to the drive shaft 5 so that the rotation from the drive motor is transmitted via the clutch 12.

The attachment state of the drive side sprockets 6 and 7 to the drive shaft 5 is shown in FIG. (A) is a side view which shows the case of the 1st chain 2, (b), (c) is sectional drawing which shows the case of the 2nd chain 1 with a top roller.
The drive side sprocket 6 is attached to the drive shaft 5 through a bearing 11 so as to be rotatable. A clutch member 12a is fixed to the drive-side sprocket 6, and a clutch member 12b that transmits rotation from the drive motor 4 to the clutch member 12a is fixed to the drive shaft 5 by a clutch fixing portion 12c.

  However, the clutch member 12b is movable in the axial direction with respect to the clutch fixing portion 12c. For example, using a known electromagnetic clutch, the drive side sprocket 6 of the chain 1 with the top roller is rotated by the drive shaft 5 connected to the drive motor 4 via the clutch 12 (switching means) (12a, 12b, 12c). I was told. That is, the clutch 12 mechanism constitutes switching means for switching the operating state of the chain between the first pattern and the second pattern described above, and if the clutch member 12a and the clutch member 12b are connected, the second is achieved. If the pattern operation is not connected, the first pattern operation can be performed. The operation of the first and second patterns described above can be easily switched by the transport device having such a chain drive mechanism.

  In this way, the circular material W can be rotationally cooled without fear of causing pitch deviation and conveyance scratches, the conveyance machine can be greatly simplified, and the material W can be efficiently and uniformly cooled. Cooling floor 10 was realized.

It is a side view which shows the chain type conveying apparatus with which a cooling floor is equipped. It is YY sectional drawing of FIG. It is a top view which is equipped in a cooling floor and shows a suitable chain drive mechanism. It is a side view which shows the chain type conveying apparatus with which a cooling floor is equipped. It is a side view which shows the drive method of each chain which comprises the conveying apparatus of FIG. It is a figure which shows the attachment state of the drive side sprocket of FIG. 3, (a) is a side view in the case of a 1st chain, (b), (c) is sectional drawing in the case of a 2nd chain. It is a side view which shows the structure of the chain of the conventional conveying apparatus. It is front sectional drawing of FIG.

Explanation of symbols

W Material t Thickness p 1 pitch θ Inclination angle of plate outer surface with respect to horizontal 1 Chain with top roller (second chain)
2 First chain 1b, 2b Link plate 1a Bearing member 2a Top plate 3 Top roller 3a Center of rotation 4 Drive motor 5 Drive shaft 6, 7 Drive side sprocket 8, 9 Drive side sprocket
10 Cooling floor
11 Bearing
12 Clutch (switching means)
12a, 12b Clutch member
12c Clutch fixing part
20 Reverse chain
20a Ring top surface
21 Transport chain
22 rings
23 rings
22a, 23a Top plate
24 Rolling roller
25 idler rollers
26 Support beam F Transport direction R Reverse feed direction W ₁ and W ₂ materials (round steel and square steel, respectively)

Claims (3)

In a cooling bed equipped with a chain type conveying device in which a plurality of chains are arranged in parallel in the longitudinal direction of a round bar or cylindrical material,
A top plate is provided on the link plate, and the top plate forms a loading surface capable of continuously loading the material;
A second chain having a link plate provided with a top roller protruding above the stacking surface at a predetermined interval in the longitudinal direction of the chain;
Arranged in the transport direction,
The chain driving mechanism can drive the first chain and the second chain synchronously in the same direction at the same speed, and the synchronized operating state and the second chain stopped. A cooling bed comprising switching means capable of switching to an operating state in which the first chain is in a driving state.   The drive mechanism includes a sprocket that matches both side ends of the first chain and the second chain, a sprocket that matches at least one side end of the first chain, and at least one side end of the second chain. A drive motor for driving the matched sprocket via a drive shaft; and a clutch for switching transmission / non-transmission of the driving force from the drive motor to the driving sprocket of the second chain as the switching means. The cooling bed according to claim 1.   The first chain and the second chain are arranged so as to be inclined so that positions of the stacking surface and the top roller become higher toward the downstream side in the transport direction. The cooling bed according to 2.

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