JP3381629B2 - Rubber sleeve for winding metal band and winding reel - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber sleeve for winding a metal band, which is attached to a winding reel of a winding facility in a processing line for winding a metal band such as a cold rolled steel plate or a stainless steel plate into a coil. Specifically, when winding a metal band, a rubber sleeve for winding the metal band prevents the occurrence of waist bending, which is a quality defect called an end mark or a top mark, which occurs in the inner diameter part of the metal band coil due to the step at the tip of the metal band. Regarding

[0002]

2. Description of the Related Art A take-up reel (hereinafter, also simply referred to as "reel") used for winding a metal strip such as a cold-rolled steel sheet or aluminum has a divided segment on the outer peripheral portion of an expansion / contraction rod that moves forward and backward. It is generally used to move in the radial direction to expand and contract the outer diameter of the reel.The outer diameter of the reel is expanded to wind the metal strip into a coil, and after winding, the outer diameter is reduced. The structure is such that the metal strip coil is taken out.

In winding the metal strip with such a scale-up / down reel, gaps or steps between the segments are easily transferred to the inner diameter of the metal strip coil when the segments are enlarged. A rubber sleeve is attached to the outer circumference of the reel, and a metal band is wound around the surface of the rubber sleeve by an endless belt winding device called a belt wrapper, and then tension is applied to wind the metal strip.

As the shape of the rubber sleeve, a simple cylindrical shape having a uniform thickness is usually used. However, in winding the rubber sleeve by a reel, when the metal strip is wound on the reel, Due to the step at the leading edge of the metal strip, hip breakage is likely to occur over a range of several to several tens of turns from the start of winding the metal strip, and surface defects such as so-called end marks and top marks occur, resulting in a significant decrease in yield. There is a problem of bringing.

With respect to the above-mentioned waist bending problem, the following various measures have been proposed. A. Technology that reduces the step at the tip of the metal band by tapering or thinly processing the tip of the metal band.

A. A range of a certain length is rolled from the tip of the metal strip to reduce the plate thickness (Japanese Patent Laid-Open No. 61-126927). b. The tip of the metal strip is processed into a taper shape by a swaging roll (Japanese Utility Model Laid-Open No. 52-38139).

C. The front end of the metal band is processed into a tapered shape by a grinder (Japanese Utility Model Laid-Open No. 56-131991). d. The tip of the metal strip is processed into a taper shape by a cutter (Japanese Patent Laid-Open No. 63-237858).

B. Technology that reduces the step at the leading edge of the metal band by inserting a cushioning material. a. A cushioning material such as corrugated board is inserted in a range where the most distal end of the metal strip overlaps the second roll (Japanese Patent Laid-Open No. 59-1019, Japanese Laid-Open Patent No. 5-337542, and Japanese Utility Model Laid-Open No. 52-10).
0834).

C. A technology that reduces the step at the tip of the steel plate (metal band) by providing the rubber sleeve with steps, depressions, and soft parts.

A. Provide a step on the rubber sleeve. b. The rubber sleeve is provided with a depression (Japanese Patent Laid-Open No. 6-1634).
1 and JP-A-6-246349).

C. A soft portion is provided on the rubber sleeve (Japanese Patent Laid-Open No. 5-285540). d. A void is provided inside the rubber sleeve to adjust the pressure in the void (JP-A-7-80543).

[0012]

However, the above-mentioned "Technique for reducing the step at the tip of the metal band by tapering or thinly processing the metal band tip" of A mentioned above is used to measure the width of the metal band to the plate width. It is not practical because it is difficult to machine with high accuracy in the direction, and there is a problem that the processing equipment becomes large and the cost is high, and the trouble of winding work easily occurs because the tip of the metal strip is sharp.

The above-mentioned "Technique for inserting a cushioning material to reduce the step at the leading edge of the metal strip" requires a device and a complicated control for accurately inserting the cushioning material at a predetermined position of the metal strip. There are problems such as. Also, when the worker inserts,
The production efficiency is reduced, which is a safety issue.

In the method of "a step is provided on the rubber sleeve" in the above-mentioned C, it is necessary to position the tip of the metal band with an accuracy of about 10 mm, and complicated control is required. Also,
The method of “providing a recess in the rubber sleeve” of b in C or the method of “providing a soft portion in the rubber sleeve” of c has a positioning accuracy of about 50 mm at the tip of the metal band, which facilitates positioning, but Although there is an allowable range, there is a problem that it cannot be applied to a wide range of plate thicknesses. For example, if the shape of the recess is determined according to the maximum plate thickness, the coil inner diameter is deformed when winding a thin material, which causes a new problem that the coil cannot be wound into a perfect circle, or the recess There arises a problem that the plate breaks at the corners. Therefore, it is necessary to replace the rubber sleeve according to the plate thickness,
Increasing the number of rubber sleeves incurred will increase costs and replacement work will inevitably reduce productivity. In addition, the method of "C, in which a void is provided inside the rubber sleeve and the pressure in the void is adjusted" of C, requires a large modification of the reel, resulting in high cost.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems and to reliably prevent the occurrence of bending of the metal band when winding the metal band by an extremely simple means, and a rubber sleeve for winding the metal band. To provide a take-up reel.

[0016]

It has been conventionally known that the cause of the bending of the metal strip is a step due to the plate thickness at the leading edge of the metal strip.

FIG. 1 is a schematic diagram schematically showing the occurrence of waist bending. In the figure, reference numeral 1 is a metal band, 2 is a reel, and 3 is a coil.

In FIG. 1, when winding the metal strip,
The A portion of the first winding of the metal strip 1 is not in contact with the reel 2, and the surface pressure does not act on the lower surface thereof, but only the upper surface thereof. As a result, B that comes into contact with the leading edge part 1-1 of the metal strip
An excessive bending moment acts on the portion, and waist bending occurs at the portion B. In the second and subsequent windings, the winding is performed in a manner along the first bending of the waist, and the bending of the waist occurs again.

Therefore, the present inventors constructed the rubber sleeve with an inner layer sleeve and an outer layer sleeve that is not adhered to the inner layer sleeve, and utilize the deformation in the circumferential direction of the outer layer sleeve at the time of winding to take advantage of FIG. A method of applying surface pressure to the lower surface of the part A to suppress the occurrence of waist bending was conceived.

The present inventors have conducted research based on the above basic idea, and completed the present invention.

The gist of the present invention is as follows (1) to (4).

(1) A rubber sleeve mounted on a take-up reel in a take-up facility for a metal band processing line,
A rubber sleeve for winding a metal band, wherein the rubber sleeve comprises an inner layer sleeve and an outer layer sleeve that is not adhered to the inner layer sleeve.

(2) The thickness of the outer layer sleeve is 8 mm or more 15
The rubber sleeve for winding a metal band according to the above item (1), characterized in that the length is not more than mm.

(3) The metal according to item (1) or (2) above, characterized in that a recess is provided in the surface of the inner layer sleeve in the axial direction, and the corner of the recess is a smooth curved surface. Rubber sleeve for band winding.

(4) The maximum depth of the recess is 2 of the thickness of the metal strip.
The rubber sleeve for winding a metal band according to the above item (3), wherein the width is 70 times or more and 120 mm or less in the circumferential direction of the recessed portion being 0.5 times or more and 0.5 times or more.

(5) A take-up reel equipped with the rubber sleeve for winding a metal band according to any one of the above items (1) to (4).

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 shows a rubber sleeve for winding a metal band according to the present invention (hereinafter simply referred to as "rubber sleeve").
FIG. 6 is a schematic view showing a winding state by a reel on which is mounted. FIG. 3 is a schematic diagram showing a deformed state of the rubber sleeve around the tip of the metal band.

In FIG. 2, the rubber sleeve 4 according to the present invention is characterized by comprising an inner layer sleeve 5 and an outer layer sleeve 6 which is not adhered to the inner layer sleeve 5. The metal strip 1 can be wound up. The inner layer sleeve 5 and the outer layer sleeve 6 can have a uniform thickness in the circumferential direction.

Here, the inner layer sleeve 5 and the outer layer sleeve 6
2 is a non-adhesive state, the outer layer sleeve 6 is stretched in the circumferential direction by the radial pressing of the metal strip 1 during the first winding, as shown in FIG. Occurs. The slack 8 moves in the circumferential direction as the metal strip 1 is wound up, and accumulates so as to fill the gap on the lower surface of the portion A as shown in FIG. Therefore, the surface pressure from the outer layer sleeve 6 acts on the lower surface of the portion A of FIG. 3, and the bending moment acting on the portion B of the same figure in contact with the leading edge portion 1-1 of the metal band becomes small, so that the portion B The occurrence of hip breaks is suppressed.

If the thickness of the outer layer sleeve is too large, the extension deformation is small and the effect of suppressing waist bending is small, and if it is too small, the service life of the outer layer sleeve is short due to abrasion or damage, and durability becomes a problem. Therefore, the thickness of the outer layer sleeve is preferably 8 mm or more and 15 mm or less.

FIG. 4 is a schematic view showing a winding state by a reel equipped with a rubber sleeve according to a preferred embodiment of the present invention. FIG. 5 is a schematic diagram showing a deformed state of the rubber sleeve around the tip of the metal band. In FIGS. 4 and 5, the same elements as those in FIG. 2 or 3 are denoted by the same reference numerals.

In FIG. 4, a rubber sleeve 4 according to a preferred embodiment of the present invention has a recess 5-1 on the surface of an inner layer sleeve 5.
Is provided in the axial direction, and the corner portion 5-2 of the recessed portion 5-1 has a smooth curved surface, and the metal band 1 can be wound by the reel 2 having the rubber sleeve 4 mounted thereon.

As shown in FIG. 4 or FIG. 5, since the inner layer sleeve 5 is provided with the recessed portion 5-1 in the axial direction, the outer layer sleeve 6 formed along the recessed portion 5-1. By winding the metal band tip portion 1-1 in the hollow portion 6-1 so that the metal band tip portion 1-1 is wound, in addition to the effect of forming the slack 8 described above, The effect of sinking to -1 is produced, and the occurrence of waist bending can be suppressed more effectively. Corner portion 5 of the recessed portion 5-1
Since 2 is a smooth curved surface, there is no new waist break due to the corner portion 5-2.

FIG. 6 is a detailed sectional view showing an example of the shape of the recessed portion provided in the inner layer sleeve. In the figure, reference numeral h is the maximum depth of the recessed portion 5-1, W is the width of the recessed portion 5-1 in the circumferential direction, and r1 and r2 are the radii of curvature of the recessed portion 5-1.

The maximum depth h of the recessed portion is preferably not more than 2 times and not less than 0.5 times the plate thickness of the metal strip from the viewpoint of the effect of suppressing waist bending and the stability of forming the inner diameter of the coil. In addition, the width W of the recess in the circumferential direction is preferably 70 mm or more and 120 mm or less from the viewpoint of the effect of suppressing waist bending and the positioning control accuracy for the alignment of the front end of the metal band. The radius of curvature r1 of the inner sleeve contacting the outer diameter cylinder is
If it is too small, new waist breaks are likely to occur at the corners, so it is preferable to set it to 0.7 times or more of the outer radius of the inner cylinder sleeve, and the upper limit is not particularly set, but usually 0.9 times or less. Good. The radius of curvature r2 following the radius of curvature r1 is preferably smaller than r1 toward the center of the recess. Further, it is desirable that the shape of the recessed portion provided in the inner layer sleeve is symmetrical so as not to depend on the winding direction.

The material of the rubber sleeve is not particularly limited, and a commonly used oil resistant rubber (NB
R) or the like, and the outer sleeve may be durable polyvinyl alcohol (PVA) or the like. As for the hardness of the sleeve, if both the inner layer sleeve and the outer layer sleeve are too hard, hip breakage is likely to occur at the E portion of FIG. 3 or FIG. 5, so it is desirable that the hardness is Hs 80 or less. H occurs because
s45 or more is preferable. More preferably, it is Hs 50 or more and 70 or less.

Next, a description will be given of the winding procedure by the winding reel equipped with the rubber sleeve of the present invention. As shown in FIG. 2 or FIG. 4, the metal strip 1 has a belt wrapper 9
After being wound between the belt 7 and the outer layer sleeve 6 and winding several turns, the belt trumpet 9 is retracted and tension is applied. Here, when the inner layer sleeve has a recessed portion, as shown in FIG. 4, the recessed portion 6-1 of the outer layer sleeve 6 is formed such that the metal band leading edge portion 1-1 is formed along the recessed portion 5-1. Positioning is performed so that it is stored inside, and winding is performed. If the inner layer sleeve does not have a recessed portion, the above-mentioned alignment is not required during winding, and therefore the work is extremely easy.

As described above, in the examples of FIGS. 2 to 5, the inner sleeve is a single layer as the rubber sleeve of the present invention, but it may be a multi-layer of two or more layers.

[0039]

Example 1 As a rubber sleeve of the present invention,
Two types of rubber sleeves having two layers, an outer layer sleeve and an inner layer sleeve, whose basic shapes are shown in FIGS. 2 to 6, were manufactured. Table 1 shows the main specifications. Example 1 of the present invention does not have a recess, and Example 2 of the present invention has a recess. Table 2
Shows the specifications of the conventional rubber sleeve manufactured for the comparative test. Conventional Examples 1 and 2 are single-layer rubber sleeves, Conventional Example 1 has a recessed portion shown in FIG. 7, which will be described later, and Conventional Example 2 has no recessed portion.

[0040]

[Table 1]

[0041]

[Table 2]

FIG. 7 is a detailed sectional view showing an example of the shape of the recess in the conventional single-layer rubber sleeve. W is the width of the recess in the circumferential direction, h is the maximum depth of the recess, and r is the recess. The radius of curvature.

The above rubber sleeve was mounted on a reel, and a cold-rolled steel strip (yield point: 28 kgf / mm ² ) having a sheet thickness of 1.6 mm and a sheet width of 1000 mm was wound up at a tension of 3 kgf / mm.
As No. ² , up to 300 rolls were wound. The wound coil was rewound without tension, and a sample for end mark measurement was cut out from the steel strip of the 2nd to 50th turns. The end mark can be found in the literature (The 48th Plastic Working Joint Lecture Meeting 1997
p579-580), the end mark curvature (difference between the maximum curvature of the end mark portion and the curvature of the base material portion which is not affected by the end mark) was evaluated.

FIG. 8 is a graph showing the measurement results of the end mark curvature. The larger the end mark, the larger the end mark curvature, and the end mark curvature becomes 1.0
If it exceeds (1 / m), the end mark can be visually confirmed, which is a problem.

As is clear from the figure, in the case of the rubber sleeves of Inventive Example 1 and Inventive Example 2, the end marks almost disappeared after the sixth and fourth windings, respectively. On the other hand, in the case of the rubber sleeve of Conventional Example 1, a problematic end mark occurred at the 11th winding, and in the case of the rubber sleeve of Conventional Example 2, a problematic end mark occurred at the 20th winding. .

Therefore, by winding the rubber sleeves of Examples 1 and 2 of the present invention, the cutting loss due to the end mark was greatly reduced and the yield was improved.

(Example 2) Next, four types of rubber sleeves of the present invention example and the conventional example shown in Table 1 were used, and the plate thickness was 0.4.
Winding was performed under the same conditions as in Example 1 under other conditions of ˜3.2 mm, and a sample was cut out from the fifth winding of each coil to investigate the end mark curvature. The results are shown in Table 3.

[0048]

[Table 3]

As shown in Table 3, in the case of the rubber sleeve of Conventional Example 1, a thin material and in the case of Conventional Example 2, a large end mark was generated in a thick material. The end mark of Conventional Example 1 was generated at the position corresponding to the corner of the recessed portion, not at the position corresponding to the leading edge of the steel plate (metal strip).

In the case of the rubber sleeves of Examples 1 and 2 of the present invention, the end mark is reduced at any plate thickness, and particularly in Example 2 of the invention, the effect of reducing the end mark with a thick material is remarkable.

In the rubber sleeve of the present invention, the deterioration of the rubber is caused only in the outer layer sleeve. Therefore, only the outer layer sleeve, which is easy to manufacture, needs to be replaced, and the cost can be greatly reduced.

[0052]

EFFECTS OF THE INVENTION According to the present invention, it is possible to suppress the bending of the waist which occurs when winding the metal strip. More specifically, quality defects such as end marks and top marks are reduced, product quality is improved, and yield is improved. Further, the cost of the rubber sleeve is also reduced.

[Brief description of drawings]

FIG. 1 is a schematic diagram that schematically shows the occurrence of waist bending.

FIG. 2 is a schematic view showing a winding state by a reel equipped with a rubber sleeve for winding a metal band according to the present invention.

FIG. 3 is a schematic view showing a deformed state of the rubber sleeve around the tip of the metal band.

FIG. 4 is a schematic view showing a winding state by a reel equipped with a rubber sleeve according to a preferred embodiment of the present invention.

FIG. 5 is a schematic view showing a deformed state of the rubber sleeve around the tip of the metal band.

FIG. 6 is a detailed cross-sectional view showing an example of the shape of a recess provided in the inner layer sleeve.

FIG. 7 is a detailed cross-sectional view showing an example of the shape of a recess in a conventional single-layer rubber sleeve.

FIG. 8 is a graph showing measurement results of end mark curvature.

[Explanation of symbols]

1 metal strip 1-1 Leading edge of metal strip 2 reel 3 coils 4 rubber sleeves 5 Inner layer sleeve 5-1 Recessed part 5-2 corner 6 outer layer sleeve 6-1 recess 7 belt 8 sagging 9 Belt trappers

Continuation of the front page (56) Reference JP-A-7-267503 (JP, A) JP-A-6-246349 (JP, A) JP-A-7-178453 (JP, A) JP-A-5-146822 (JP , A) Actual Kaihei 6-86809 (JP, U) Actual Kaihei 3-31012 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B21C 45/00-49/00

Claims (5)

(57) [Claims] 1. A rubber sleeve to be mounted on a take-up reel in a take-up facility for a metal band processing line, wherein the rubber sleeve comprises an inner layer sleeve and an outer layer sleeve that is not adhered to the inner layer sleeve. A rubber sleeve for winding metal bands. 2. The outer sleeve has a thickness of 8 mm or more and 15 m.
The rubber sleeve for winding a metal band according to claim 1, wherein the rubber sleeve is m or less. 3. The rubber sleeve for winding a metal band according to claim 1, wherein a concave portion is provided on the surface of the inner layer sleeve in the axial direction, and a corner portion of the concave portion has a smooth curved surface. . 4. The maximum depth of the recess is the thickness of the metal strip.
The rubber sleeve for winding a metal band according to claim 3, wherein the width is 70 mm or more and 120 mm or less in the circumferential direction of the recessed portion at 0 times or less and 0.5 times or more. 5. A take-up reel comprising the rubber sleeve for winding a metal band according to claim 1.