JP5598093B2 - Fixing the tension reel and sleeve to the tension reel - Google Patents

Description

  The present invention relates to a tension reel for winding a thin steel plate in a continuous annealing line or a plating line of a thin steel plate, and more specifically to a tension reel and a fixing method of a sleeve attached to the outer surface of the tension reel.

In a continuous annealing line or a plating line, the steel plate that has been annealed or plated is wound on a reel disposed at the end of the line for subsequent processing, processing steps, or shipment. This reel is basically composed of a rotary drive device and a mandrel that is rotatably supported at one end in the axial direction by the rotary drive device. The mandrel is composed of a plurality of segments (for example, divided into four) divided in the circumferential direction.
When winding a thin steel sheet on a mandrel, the thin steel sheet is pressed against the surface of the mandrel by a pressing device, and is applied to the mandrel by the frictional friction between the mandrel and the thin steel sheet and the tension applied to the thin steel sheet. Wrapped. As described above, the mandrel, which is the take-up shaft of the tension reel, is constructed by interconnecting multiple segments divided in the circumferential direction, so there are split grooves in the axial direction of the mandrel and they can be used as they are Then, when the thin steel plate is wound into a coil shape, the divided grooves are transferred to the thin steel plate, resulting in surface defects, and the quality and yield are reduced.

  In order to prevent this, a sleeve made of rubber or synthetic resin (urethane) having wear resistance and elasticity is provided on the surface of the mandrel so as to cover the outer peripheral surface of the mandrel. This sleeve is fixed to the mandrel so that when the coil wound with the thin steel plate is pulled out from the mandrel, it is pulled out together with the coil and does not fall off from the mandrel. Regarding a method for fixing a sleeve to a mandrel, for example, Patent Document 1 discloses a thin wall having a thickness of 2 to 5 mm made of an elastic body that expands and contracts in accordance with the expansion and contraction of the mandrel when winding a thin steel strip around a tension reel. There is disclosed a method for preventing a reel mark or a coil from being crushed by using a tension reel equipped with a sleeve. However, in this method, since the sleeve is fixed by expansion and contraction of the mandrel, it is necessary that the sleeve is an elastic body that expands and contracts, and the sleeve may be deformed during winding, and it is difficult to obtain stable winding. It is.

JP 2003-230912 A

For this reason, the sleeve is provided with rigidity, and this is fixed to the mandrel with a bolt.
When the thickness of the sleeve is sufficiently large, the bolt head is made to be lower than the thickness of the sleeve, i.e., by forming a recess in the bolt fixing position of the sleeve and bolting in this recess. Since the head can be fixed by being positioned lower than the surface of the sleeve, the head of the bolt for fixing the sleeve can be wound up without protruding the surface of the sleeve and damaging the thin steel plate. That is, the sleeve can be fixed to the mandrel on both sides of the drive side (rotary drive side of the mandrel) and the extraction side (coil extraction side). However, in this case, at the bolt fixing position of the sleeve, the thickness obtained by subtracting at least the thickness corresponding to the height of the head of the bolt from the thickness of the sleeve is sufficient to fix the sleeve on the mandrel segment. It is necessary that the thickness of the sleeve be sufficient, and the thickness of the sleeve usually depends on the strength of the sleeve material, but the height of the head of the bolt + 5 mm or more.

  On the other hand, the winding inner diameter of the coil is fixedly defined in relation to the subsequent processing of the coil and the diameter of the mandrel of the coil processing apparatus such as the payoff reel in the processing step. It is necessary to reduce the diameter of the minute mandrel. However, when the diameter of the mandrel is reduced, the strength is lowered, and when a thin steel plate such as a tin plate is wound, the mandrel is bent, wrinkles are generated on the steel plate, and the film is stretched. For this reason, there is a limitation in increasing the thickness of the sleeve, and it is difficult to increase the thickness of the sleeve.

  In the case of such a small thickness sleeve, the bolt head protrudes above the surface of the sleeve, and from the sleeve surface during winding and when the coil is pulled out from the mandrel after winding. The head of the protruding bolt contacts the surface of the coil, and the hook is attached. Therefore, as shown in FIG. 4, the sleeve is bolted to the segment only on the drive side of the mandrel and in an axial position outside the winding range of the steel plate, thereby reducing the thickness of the sleeve. Even if it is small, the thin steel plate is not wrinkled.

However, the sleeve is bolted to the mandrel segment only on the drive side and is not bolted on the coil extraction side (working side), so the tension between the sleeve and the thin steel plate that occurs when winding the thin steel plate around the mandrel As shown in FIG. 4, the sleeve is twisted in the direction of the extraction side. Due to this twisting, it is difficult to wind the thin steel plate while maintaining a state parallel to the winding direction, and wrinkles 11 are generated on the steel plate, making it impossible to obtain a coil wound up flat. There is. Further, there is a problem that stress is concentrated on the bolt-fixed portion of the sleeve due to tension or torsion, deformation 12 or a crack is generated in the sleeve mounting portion, and the fixing becomes unstable, and uniform winding cannot be obtained. It was.
The present invention provides a tension reel and a method of fixing a sleeve to the tension reel that enable smooth winding without damaging the surface properties and flatness of the thin steel plate when winding such a thin steel plate. Is an issue.

The present invention has been made to solve the above-described problems, and the gist thereof is as follows.
(1) A thin steel plate having at least one mandrel that is rotatably supported at one end by a rotational drive device, a rigid sleeve that covers the outer peripheral surface of the mandrel in the circumferential direction, and the drive device that rotationally drives the mandrel. A tension reel for winding, wherein the sleeve has a protrusion extending in the circumferential direction and projecting in the radial direction at an end corresponding to an axial drive side of the mandrel, and the mandrel has one end in the axial direction. The protrusion of the sleeve is loosely fitted , and a fixing member having a concave portion whose axial cross section has a curvature and a fixing portion at the other end of the driving side is loosely fitted into the concave portion of the fixing member. In this state, the tension reel is fixed by a plurality of fixing portions of the fixing member in the circumferential direction on the driving side.

( 2 ) A thin steel plate having at least one mandrel pivotally supported at one end by a rotational drive device, a rigid sleeve that covers the outer peripheral surface of the mandrel in the circumferential direction, and the drive device that rotationally drives the mandrel. A method of fixing a sleeve of a tension reel for winding, wherein the sleeve is provided with a protrusion extending in the circumferential direction and projecting in the radial direction at an end corresponding to the axial drive side of the mandrel, and the sleeve is attached to the mandrel. A plurality of sleeves that are inserted into the mandrel from the pull-out side, the projections of the sleeve are loosely fitted at one end in the axial direction, the recess having an axial cross-sectional shape has a curvature, and a fixing portion is provided at the other end on the drive side And a fixing member, wherein the protrusion of the sleeve is loosely fitted in the concave portion of the fixing member, and is fixed to the mandrel by the fixing portion in the circumferential direction on the driving side of the mandrel. The method of fixing the sleeve of Nriru.

  According to the present invention, the sleeve attached to the outer peripheral surface of the mandrel is fixed to the mandrel without being directly fixed to the mandrel by the bolt, and the mandrel is prevented from shifting in the axial direction. In this case, the restriction on the thickness of the sleeve, which has been a problem in some cases, is eliminated. Further, since the movement (sliding) in the circumferential direction (rotation direction) is allowed, the biased sleeve may be twisted toward the extraction side, which was generated when only the driving side is bolted as in the prior art. And flat winding without wrinkles on the steel sheet is realized. Furthermore, since there is no concentration of stress on the fixed portion of the sleeve as in the case of the conventional bolting, the fixed portion of the sleeve is not deformed or cracked and the fixing becomes unstable, and uniform winding is possible. realizable.

It is a partial front cross-sectional schematic diagram which shows the structure of the tension reel which concerns on embodiment of this invention. FIG. 2 is a partially enlarged view of the tension reel of FIG. 1, wherein (a) is a portion A of FIG. It is a schematic diagram which shows the other example of the fixing member in the tension reel which concerns on embodiment of this invention, (a) is a schematic diagram equivalent to the case of Fig.2 (a), (b) is x- of (a). It is a schematic diagram equivalent to x view. It is a schematic diagram which shows an example of the problem of the conventional tension reel.

The present invention will be specifically described based on an example of an embodiment.
FIG. 1 is a front sectional view showing an example of an embodiment according to the present invention. The tension reel 1 is rotatably supported on the drive side and the extraction side, and one end is for rotating the mandrel 2 to wind up the thin steel plate and the mandrel 2 rotatably supported by the rotation drive device 5. And at least a rotation drive device 5. The mandrel is composed of segments (not shown) divided into a plurality in the circumferential direction.
A cylindrical sleeve 3 is attached to the surface of the mandrel 2 in a substantially intimate contact state, and a projection 6 continuous in the circumferential direction is provided at an end corresponding to the axial driving side of the mandrel of the cylindrical sleeve. Is provided. The axial length of the sleeve is equal to or greater than the maximum width of the steel sheet to be wound.

On the other hand, a plurality of fixing members 4 are arranged in the circumferential direction of the mandrel in the vicinity of the end portion on the driving side of the mandrel. At one end (extraction side) of the fixing member 4 is formed a recess 8 that opens downward (on the surface side of the mandrel), and the protrusion 6 of the sleeve 3 is loosely fitted into the recess 8. On the other hand, the other end is fixed to the mandrel 2 by the bolt 7 in the fixing portion 10 of the fixing member on the driving side rather than the driving side end of the sleeve 3.
That is, the projection 6 of the sleeve is fitted in the recess 8 formed in the fixing member 4 with an axial and radial gap (hereinafter also referred to as loose fitting).
There is a gap a between the protrusion 6 and the fixing member 4 in the axial direction. However, when the sleeve moves to the extraction side in the axial direction, the side surface of the protrusion 6 of the sleeve eventually becomes the locking portion 9 of the fixing member 4. The movement in the axial direction is restricted by abutting against the side surface of the sleeve, whereby the sleeve 3 is locked and fixed to the mandrel.

On the other hand, there is a gap c in the radial direction (height direction) between the top surface of the projection 6 of the sleeve and the bottom surface of the concave portion 8 of the fixing member 4, and a locking portion that forms the concave portion 8 of the fixing member 4. A gap b is also provided between the lower end surface 9 and the upper surface (surface) of the sleeve 3, so that the sleeve can be slid without being restricted in the circumferential direction of the mandrel.

  With this configuration, the sleeve is locked and fixed in the axial direction with respect to the mandrel without using a bolt or the like, but fixed in a slidable state in the circumferential direction. Therefore, as compared with the case where the bolt is fixed only on the driving side, the sleeve is prevented from being twisted during winding, and stable and flat winding is possible. Even when the sleeve is thin, it can be sufficiently locked and fixed to the mandrel, preventing wrinkles on the wound steel sheet, and preventing stress from concentrating on the fixing part of the sleeve and deforming it. it can.

  In the present invention, the dimensions of the fixing member 4, the locking portion 9, the recessed portion 8, the sleeve protrusion 6, etc. are the thickness of the sleeve, the axial length of the sleeve (the maximum width of the wound steel plate), the diameter of the mandrel In addition, it is sufficient to determine the strength necessary for fixing in consideration of the material of the sleeve and the fixing member. As an example, a case where a synthetic resin sleeve having a thickness of 6 mm × 1150 mm × φ402 mm (inner diameter) is attached to a maximum width of the wound steel sheet of 1030 mm, a mandrel of 1210 mm in length × diameter 406 mm (when expanded), This will be described with reference to 2 (a) and FIG. 2 (b).

  In FIG. 2A, the height of the protrusion from the sleeve surface (the height from the upper surface of the sleeve to the top of the protrusion) is preferably about 2 to 5 mm. If it is too large, the projection will bend, and the locking and fixing force will be small. On the other hand, if it is too small, the locking and fixing allowance with the recess of the fixing member will be small, and the fixing force may be insufficient. If the length of the protrusion in the axial direction is too large, it is necessary to enlarge the concave portion of the fixing member, which is not preferable because the entire fixing member is enlarged. On the other hand, if it is too small, stress may concentrate on the projections and the projections may be destroyed.

It is important that the axial length of the locking portion 9 of the fixing member has sufficient strength from the viewpoint of suppressing the movement of the protrusion, and it is preferable that the length is large, but if it is too large, the fixing member must be large. It is not preferable. 3-7 mm is preferable.
The depth of the concave portion 8 of the fixing member, in other words, the length from the lower end surface of the locking portion 9 to the bottom surface of the concave portion is determined by the gap between the top surface of the protrusion 6 and the bottom surface of the concave portion 8 and the locking allowance. It is preferable that the gap be 1 to 5 mm.
The length of the recess 8 in the axial direction, that is, the length of the recess may be determined in consideration of the length of the protrusion 6 of the sleeve and the gap between the protrusion and the side surface of the recess, and this gap is 1 to 5 mm. It is preferable to set so that it is preferably 6 to 15 mm.

  Note that the locking allowance d, that is, the radial contact length between the top of the protrusion 6 and the lower end surface of the locking portion 9 is long enough to stop the pivoting of the sleeve in the axial direction. It is good and it is preferable to set it as 2-3 mm.

  In FIG. 2 (b), the width (length in the circumferential direction) of the fixing member may be determined in consideration of the diameter of the mandrel, the number to be installed, and the like. In this example, it is preferably 30 to 50 mm. In addition, as shown in FIG.2 (b), the surface which makes the center of the width direction a vertex and inclines on the both sides of the circumferential direction is formed in the part (lower end surface) where a fixing member contacts the outer peripheral surface of a mandrel. Is preferred. When the fixing member is fixed to the mandrel with the bolt by providing the inclined surface, the tightening force can be effectively applied. The inclination angle α of the inclined surface may be determined in consideration of the width of the fixing member, the diameter of the mandrel, and is usually about 0.5 to 1 °.

  In the present invention, the number of places in the circumferential direction of the mandrel where the fixing member is provided is not particularly limited, but is preferably at least 3 to 6 places. In some cases, an annular fixing member may be used.

  The protrusion of the sleeve is preferably made of the same material as that of the sleeve, but is not particularly limited thereto. Known materials such as metals and synthetic resins can be used. The method of forming the protrusions on the end of the sleeve is not particularly limited, and can be appropriately used depending on the material such as adhesion, welding, brazing, or a fixing member such as a bolt may be used. Further, the sleeve and the protrusion may be manufactured integrally. The shape of the protrusion is not particularly limited. For example, the axial cross-sectional shape may be a shape having a curvature, but from the viewpoint of easy manufacture, the axial cross-sectional shape is preferably rectangular. .

  The material of the fixing member is not particularly limited, and materials such as metal and synthetic resin can be used. In addition, it is preferable to use a metal material in terms of strength and the like.

The shape of the cross section in the axial direction of the bottom surface of the concave portion 8 provided in the fixing member 4 of the present invention is not particularly limited, but making it rectangular as shown in FIG. It is preferable.
Moreover, as shown in FIG. 3, it is also preferable to make the shape of the axial cross section of the bottom face of a recessed part into a shape with a curvature. By adopting such a bottom surface shape of the recess, when the projection moves to the radial extraction side and abuts against the side surface of the locking portion 9 of the recess and is pressed, the force applied to the recess is dispersed. Therefore, as in the case of FIG. 2A, since the stress concentration is reduced compared to the case where the concave portion has a corner (rectangular cross section), the required strength of the fixing member is reduced, and the member is reduced in size. Can do.

  In the tension reel of the present invention, the method of fixing the sleeve to the mandrel is, as described above, by providing the protrusion 6 extending in the circumferential direction and projecting in the radial direction at the end corresponding to the axial drive side of the sleeve mandrel. The sleeve is inserted into the mandrel, and the mandrel is provided with a plurality of fixing members 4 provided at one end thereof with a recess 6 into which the protrusion of the sleeve is loosely fitted. The other end of the sleeve is loosely fitted, and the other end is fixed to the driving side from the driving side end of the sleeve by a bolt or the like, and the sleeve is locked and fixed to the mandrel. According to this method, according to the method of the present invention, the sleeve is not directly fixed by a bolt or the like, but is fixed and fixed to the mandrel in the axial direction by the fixing member. Is fixed in a slidable state. Therefore, as compared with the case where the bolt is directly fixed only on the driving side, the sleeve is prevented from being twisted during winding, and stable and flat winding is possible. Even when the sleeve is thin, it is possible to prevent the wound steel sheet from being wrinkled or deformed due to stress concentration on the fixing portion of the sleeve.

According to the present invention, the sleeve is locked and fixed in the axial direction with respect to the mandrel, but is fixed in a slidable state in the circumferential direction.
Therefore, compared to the case where only the drive side is directly fixed with bolts, the sleeve is prevented from being twisted during winding, and stable and flat winding is possible, and the sleeve is thin. However, it is possible to prevent wrinkles from being formed on the wound steel sheet and to prevent deformation due to concentration of stress on the fixed portion of the sleeve, which is beneficial for improving production efficiency and quality.

DESCRIPTION OF SYMBOLS 1 Tension reel 2 Mandrel 3 Sleeve 4 Fixing member 5 Drive device 6 Sleeve protrusion 7 Bolt 8 Recess 9 Locking part 10 Locking part 11 Steel plate wrinkle 12 Deformation of sleeve mounting part a, b, c Gap d Locking allowance

Claims (2)

Tension for winding a thin steel plate having at least one end of a mandrel rotatably supported by a rotary drive device, a rigid sleeve that covers the outer peripheral surface of the mandrel in the circumferential direction, and the drive device that rotationally drives the mandrel The reel has a protrusion extending in the circumferential direction and projecting in the radial direction at an end corresponding to the driving side in the axial direction of the mandrel, and the sleeve is provided at one end in the axial direction of the mandrel. A fixing member having a concave portion whose axial cross-section has a curvature and a fixing portion at the other end of the driving side, and a protrusion of the sleeve loosely fitted in the concave portion of the fixing member. The tension reel is fixed by a plurality of fixing portions of the fixing member in the circumferential direction on the driving side. Tension for winding a thin steel plate having at least one end of a mandrel rotatably supported by a rotary drive device, a rigid sleeve that covers the outer peripheral surface of the mandrel in the circumferential direction, and the drive device that rotationally drives the mandrel A method for fixing a reel sleeve, wherein the sleeve is provided with a protrusion extending in the circumferential direction and projecting in the radial direction at an end corresponding to the axial drive side of the mandrel, and the sleeve is provided on the side of the mandrel withdrawing. A plurality of fixing members having a concave portion in which the projection of the sleeve is loosely fitted to one end in the axial direction, the axial cross section having a shape having a curvature, and a fixing portion at the other end on the driving side A tension leaf, wherein the protrusion of the sleeve is loosely fitted in the concave portion of the fixing member, and is fixed to the mandrel by the fixing portion in the circumferential direction on the driving side of the mandrel. The method of the sleeve fixed.

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