KR101576482B1

KR101576482B1 - Composite roller

Info

Publication number: KR101576482B1
Application number: KR1020150145822A
Authority: KR
Inventors: 최병길
Original assignee: 최병길
Priority date: 2015-10-20
Filing date: 2015-10-20
Publication date: 2015-12-10

Abstract

The present invention relates to a complex roller used for a variety of industrial fields such printing, paper manufacturing, and film and liquid manufacturing. According to the present invention, the complex roller comprises: a metal sleeve; a roll core combined by being inserted into an inner surface of the metal sleeve; and a pair of end members individually combined and fixated with both ends of the roll core. In order to minimize and lighten a thickness of the roll core, at least one reinforcing disk inserted into an inner surface of the roll core and fixated is included; thus the thickness of the carbon fiber reinforced plastic, which is the material of the roll core, is able to be 30-50% of the thickness of the existing complex roller. As such, the roller is able to be lightweight and low costs, and secures a reinforcement corresponding to an existing complex roller.

Description

COMPOSITE ROLLER

The present invention relates to a composite roller, and more particularly, to a composite roller that minimizes the thickness of a roll core made of carbon fiber-reinforced plastic by providing at least one reinforcement disk, To the composite roller.

Generally, rollers used as rotating shafts are provided in a rotatable cylindrical structure and widely used in various industrial fields such as liquid crystal and film production, printing, papermaking, and the like.

Conventional rollers are mainly made of a metal material. Such metal rolls are excellent in strength and durability, but they are heavy in weight and have a large moment of inertia. Therefore, in processing films and paper, And various troubles are easily caused in the object to be treated, and there is a disadvantage that a long time is required at the start and stop.

In order to solve the disadvantages of the roller made of a metal material, a composite roller in which a carbon fiber reinforced plastic, which is light in weight compared to metal and has a low moment of inertia and high rigidity, is fitted and integrated with the inner surface of a hollow pipe is developed have.

Conventional composite rollers related to this technique are disclosed in Japanese Patent Laid-Open No. 2004-204357 and Korean Patent No. 10-1253727, which are disclosed in the patent documents of the prior art documents. The composite rollers disclosed in the above prior art documents include a roll core made of a carbon fiber reinforced plastic material, a metal sleeve coupled in a pressure fitting manner to the outer main surface of the roll core, And a pair of end members individually fastened and fixed to both ends of the core.

In the conventional composite roller having the above-described configuration, the metal sleeve is usually a hollow pipe having a thickness of 0.5 to 2 mm, and the roll core is usually used in a range of 5 to 25 mm, but its thickness is 5 mm, 7 mm, Mm, 12 mm, and 15 mm.

The roll core is inserted and fixed to the inner surface of the metal sleeve as described above, thereby achieving a somewhat reduced weight, achieving high-speed rotation and securing a reduction in rotational inertia. However, the cost of the carbon fiber- There was a problem that the product competitiveness was deteriorated due to the high price of ~ 340,000 won. In order to maintain the strength of the composite roller, there was a limitation in reducing the weight of the composite roller because a relatively thick roll core was adopted.

Accordingly, there has been a desperate need for a composite roller in which the thickness of the carbon fiber reinforced plastic, which is the material of the roll core, is minimized to lighten the weight, lower the cost, and strengthen the strength in comparison with the existing composite roller.

JP, P2004-204357, A, (published on July 22, 2004) KR 10-1253727 B1 (Registered on April 4, 2015)

The present invention has been researched in order to solve the above-mentioned conventional problems, and it is an object of the present invention to provide a carbon fiber reinforced plastic roll core, It is possible to minimize the thickness of the carbon fiber reinforced plastic to 30 to 50% of the thickness of the conventional composite roller, thereby providing a composite roller that can be made lighter, lower in unit cost, It has its purpose.

Another object of the present invention is to provide a tapered female screw in the center of a reinforcement disk and to cut out a straight line from the center of the reinforcement disk toward the outward direction to form a slit and to insert a tapered male screw into a tapered female screw, And then the taper male thread is further inserted to enlarge the outer diameter of the reinforcement disk, so that the reinforcing disk can be firmly fixedly secured to the inner main surface of the roll core.

According to an aspect of the present invention, there is provided a composite roller comprising: a metal sleeve; a roll core coupled to an inner main surface of the metal sleeve in a pressure fitting manner; And a pair of end members that are individually engaged and fixed to the base member,

And at least one reinforcement disk inserted and fixed on the inner main surface of the roll core in order to minimize the thickness and weight of the roll core and to reinforce the strength of the roll core.

The reinforcing disk is provided with a tapered female screw at the center of the disk, and a slit cut linearly outward from the center thereof is provided, and a tapered male screw is fastened to the tapered female screw to extend the outer diameter of the reinforcing disk.

The reinforcement disk is provided with a flange whose outer peripheral surface is wider than the thickness of the disk so as to be smoothly inserted when inserted into the roll core, and the outer diameter of the flange is 0.1 to 0.6 mm smaller than the inner diameter of the roll core. The reason for limiting the outer diameter of the reinforcing disk is that if the diameter of the reinforcing disk is less than 0.1 mm, the inserting operation is difficult and the inner main surface of the roll core can be shaved. If the diameter exceeds 0.6 mm, It may not be fixed properly.

And a concavo-convex portion is formed on the flange outer main surface of the reinforcing disk so as to more reliably adhere to the inner main surface of the roll core by an adhesive.

It is preferable that the slit is provided in a V shape (V-shape) extending from the center of the original plate toward the outside so that the original plate can be expanded while expanding.

Also, the reinforcement disk may have a plurality of holes uniformly arranged on the same circumference in order to reduce its weight.

The reinforcement disk is preferably aluminum or aluminum alloy having a specific gravity smaller than that of iron (Fe) and being lightweight.

When a plurality of reinforcement discs are inserted and coupled to the roll core, it is preferable that the directions of the slits are arranged at an equal central angle in consideration of the balance of the composite rollers. For example, when three reinforcement discs are installed, the slits of the reinforcement discs installed at the middle of the roll core should be referred to as assemblies so that they are shifted from each other by an equal angle of 120 degrees divided by the number of reinforcement discs do.

According to the composite roller of the present invention, the roll core of the carbon fiber-reinforced plastic is fixedly coupled to the inner surface of the metal sleeve, and at least one reinforcement disk is provided on the inner surface of the metal sleeve, The thickness of the composite roller can be minimized by 30 ~ 50% of the thickness of the composite roller. Therefore, it is possible to lighten the weight by 12 ~ 20% compared to the conventional composite roller and lower the unit cost. It is possible to secure the strength of the roller.

In the present invention, a tapered female screw is provided at the center of the reinforcing disk, and a slit is formed by cutting straightly outward from the center thereof. A tapered male screw is inserted into the tapered female screw, By further inserting the male screw, the outer diameter of the reinforcement disk is expanded, so that the reinforcement disk can be surely tightly fixed to the inner main surface of the roll core.

In addition, according to the present invention, the reinforcement disk can be smoothly inserted into the roll core by providing the outer main surface of the reinforcement disk with a flange wider than the thickness of the disk and having an outer diameter smaller than the inner diameter of the roll core by 0.1-0.6 mm. The assembling workability and the productivity can be improved.

1 is a longitudinal section view of a preferred composite roller according to an embodiment of the invention.
Fig. 2 is a partially enlarged cross-sectional view of the composite roller of the present invention.
FIG. 3 is an exploded perspective view showing a reinforcing disk and a tapered male screw, which are major parts in the composite roller of the present invention.
4 is a cross-sectional view of Fig.
5 is a side view of Fig.
6 is a view illustrating a process of assembling a reinforcement disc on a roll core in the composite roller of the present invention.

Hereinafter, preferred embodiments of the composite roller according to the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , It may be changed according to the user, the intention of the operator, the custom, and the definition of the term should be based on the contents of the entire specification of this specification.

1 is a view illustrating a composite roller according to an embodiment of the present invention.

As shown in the figure, the composite roller of the present invention comprises a metal sleeve 10, a roll core 20 which is press-fitted to the inner surface of the metal sleeve 10, And a pair of end members 30 that are individually coupled to both ends of the base 20. And at least one reinforcement disc 40 inserted and fixed to the inner main surface of the roll core 20 so as to minimize the thickness and weight of the roll core 20.

The end member 30 can be variously adopted depending on the working machine, and is shown in FIG. 1 as being rotatably connected and supported by the rotating shaft of the working machine and the bearing. It is also possible to fasten another short shaft through a bolt as a fastener to the end member 30 of FIG. 1, or to integrally provide a short shaft to the end member 30.

The reinforcing circular plate 40 is provided with a tapered female screw 42 at the center of the circular plate 41 and a slit 43 cut linearly outward from the center of the circular plate 41. The reinforcing circular plate 42 The tapered male thread 49 is fastened. It is preferable that the slit 43 is formed in a V-shape extending from the center of the circular plate 41 toward the outer side so that the circular plate 41 can be folded and expanded.

The reinforcing disk 40 is provided with a flange 44 whose outer peripheral surface is wider than the thickness of the disk 41 so as to be smoothly inserted into the roll core 20, It is preferable that the outer diameter is set to 0.6 mm smaller. The reason for limiting the outer diameter of the reinforcing disk 40 is as follows. When the diameter of the reinforcing disk 40 is less than 0.1 mm, the insertion tolerance is too small to insert the roller core 20 and the inside surface of the roller core 20 can be shaved. Because of the limitation that the outer diameter of the reinforcing disk 40 is expanded by the elastic force of the spring 40,

The uneven portion 45 may be formed on the outer peripheral surface of the flange 44 of the reinforcing disk 40 to more reliably adhere to the inner main surface of the roll core 20 with an adhesive. The concave-convex portion 45 may be provided with ring-shaped fine grooves at regular intervals or irregular irregularities over the entire main surface.

A plurality of holes 46 uniformly arranged on the same circumference may be formed in the reinforcement disk 40 to reduce its own weight. The reinforcement disk 40 may have a smaller specific gravity than iron (Fe) Aluminum or an aluminum alloy is preferable.

The metal sleeve 10 is formed of a cylindrical pipe made of a metal having excellent rigidity such as stainless steel, aluminum alloy, or the like. The thickness of the metal sleeve 10 is smaller than the thickness of the roll core 20.

Preferably, the thickness of the metal sleeve 10 is 0.5 to 1.2 mm. If the thickness of the metal sleeve 10 is less than 0.5 mm and it is too thin, the metal sleeve 10 is easily deformed and broken even by the minute flow when the pressing force is applied by the pressure fitting method. On the contrary, if the thickness of the metal sleeve 10 exceeds 1.2 mm, the strength is increased by an increase in cross-sectional area, so that the deformation or defect rate of the metal sleeve is lowered. However, It gets harder.

The outer circumferential surface of the roll core 20 is hermetically fitted in the inner circumferential surface of the metal sleeve 10 in a pressure fitting manner by a press mechanism (not shown) so that the metal sleeve 10 is inserted into the roll core 20 A structure in which the metal sleeve 10 is integrated with the outer peripheral surface of the roll core 20 can be effectively implemented.

Particularly, since the inner diameter of the metal sleeve 10 is formed to be smaller than the outer diameter of the roll core 20, the outer peripheral surface of the roll core 20 and the inner peripheral surface of the metal sleeve 10 are combined in a very tight pressure fitting manner . It is preferable that the outer diameter of the roll core 20 is formed to be 0.08 to 0.18 mm larger than the inner diameter of the metal sleeve 10 and more preferably the inner diameter of the roll core 20 The outer diameter may be formed as large as 0.1 to 0.15 mm.

After the roll core 20 is joined to the metal sleeve 10 in a pressure fitting manner, at least one reinforcement disk 40 is inserted and fixed to the metal sleeve 10, and then the outer peripheral surface of the end portion of the metal sleeve 10, It is possible to weld the outer major surface of the end member 30 so that the end member 30 and the ends of the metal sleeve 10 and the roll core 20 can be joined very firmly to the end member 30 through the metal sleeve 10 and the roll core 20 to be permanently used.

The roll core 10 is a cylindrical pipe made of carbon fiber reinforced plastic (CFRP) and formed long in the center line direction. The roll core 10 is an expensive material because the carbon fiber-reinforced plastics are laminated in the mold in the order of lamination and then molded at high temperature / high pressure.

The thickness of the roll core 10 is designed in accordance with the torque applied to the composite roller. The thickness of the roll core 10 is typically 5 to 25 mm. By arranging at least one reinforcement disc 40, It can be thinly applied to a conventional composite roller with a core of 3.3 to 2.3 mm in thickness. As a result, the thickness of the roll core 10 can be minimized to 30 to 50% of the thickness of the conventional composite roller, thereby reducing the cost of the conventional composite roller by 12 to 20% It is possible to secure the strength reinforcement of the composite roller with almost no difference even when comparing the deflection amount with the roller.

In the figure, reference numeral 50 denotes a hand tool for inserting the reinforcement disk 40 into the inner surface of the roll core 20 and pushing it to a predetermined position.

The process of assembling the composite roller constructed as above will be explained with reference to FIG. First, a metal sleeve 10 having a constant thickness and length and a roll core 20 having an inner diameter smaller than the outer diameter of the metal sleeve 10 are prepared. The metal sleeve 10 and the roll core 20 are arranged so as to be concentric with each other so as to contact one end of the roll core 20, and then the roll core 20 and the metal sleeve 10 The outer main surface of the roll core 20 is inserted into the inner main surface of the metal sleeve 10 and is engaged.

Thereafter, at least one reinforcement disc 40 is inserted and coupled to the inner surface of the roll core 20 according to the length of the roll core 20, wherein three reinforcement discs 40 are disposed in FIG. 1 Respectively.

In the case of disposing the three reinforcement discs 40 in this way, one reinforcement disc is disposed at the center of the roll core 20 in the center divided into two, and one reinforcement disc 40 is provided in the middle between the center and both ends You can deploy it.

The process of inserting the reinforcing disk 40 is performed by fastening a tapered male thread 49 to the tapered female thread 42 of the disk 41 and connecting the hand tool 50 to the head of the tapered male thread 49 Next, the adhesive is sufficiently applied to the outer peripheral surface of the flange 44 of the reinforcing disk 40.

At this time, it is sufficient that the taper male thread 49 is fastened so that the outer diameter of the flange 44 does not expand and the taper male thread 49 does not come off. The adhesive applied to the outer peripheral surface of the flange 44 is an epoxy-based adhesive for high temperature curing.

The reinforcement disk 40 thus prepared is inserted from one side of the roll core 20 to the center of the roll core 20 by using the hand tool 50. When the hand tool 50 is rotated in this state, the tapered male screw 49 is further inserted while being rotated. As the taper male screw 49 is further inserted into the tapered female screw 42, The outer diameter of the flange 44 on the outer side of the disk 41 is expanded so that the reinforcement disk 40 is tightly fixed to the inner surface of the roll core 20.

Since the outer diameter of the flange 44 is fully extended and adhered firmly by tightly inserting the taper male screw 49 as well as by the adhesive applied to the irregular portion 45 on the outer main surface of the flange 44, It can be fixed like a squeeze. At this time, the adhesive applied to the outer main surface of the flange 44 is subjected to a pressing phenomenon during the process of inserting the flange 44 into the inner main surface of the roll core 20, Since the grooves formed in the grooves 45 meet the accommodating chambers and satisfy the insufficient adhesive.

When a plurality of reinforcement discs 40 are inserted into and coupled to the roll core 20 as described above, it is preferable that the directions of the slits 43 are arranged at equal central angles considering the balance of the composite rollers. For example, when three reinforcement discs 40 are provided as shown in FIG. 1, the slits 43 of the reinforcement disc 40 provided in the middle of the roll core 20 are used as reference, (120), which is an even angle divided by the number of mounts (40).

The other two reinforcement discs 40 are also inserted and fixed by the above-described coupling method. Then, an adhesive is applied to the outer main surface of the end member 30 and inserted into the inner main surface at both ends of the roll core 20, The end member 30 of the roll core 20 is adhered to the inner main surface at both ends of the roll core 20.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. .

10: metal sleeve 20: roll core
30: end member 40: reinforcement disk
41: original plate 42: tapered female thread
43: slit 44: flange
45: concave / convex portion 46: hole

Claims

A metal sleeve, a roll core coupled to an inner main surface of the metal sleeve in a pressure fit manner, at least one reinforcement disk inserted and fixed to the inner main surface of the roll core, And a pair of end members that are individually engaged and fixed to the base member,
The reinforcing disk has a tapered female thread at the center of the disk and a slit cut linearly outwardly from the center thereof. The tapered female thread is provided with a taper for tightening the outer diameter of the reinforcing disk to the inner main surface of the roll core, And the male screw is fastened.

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The method according to claim 1,
The reinforcement disk is provided with a flange whose outer peripheral surface is wider than the thickness of the disk so as to be smoothly inserted when inserted into the roll core, the outer diameter of which is 0.1 to 0.6 mm smaller than the inner diameter of the roll core,
Characterized in that a uniformly arranged hole is formed on the same circumference in order to reduce the weight of the reinforcement disk between the disk and the flange.

The method according to claim 1,
Wherein the slit is provided in a V-shape extending from the center of the circular plate to the outer side so as to extend while the circular plate is drawn.

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