KR20140083406A - Friction Shaft For Slitter - Google Patents

Abstract

The present invention relates to a friction shaft for slitter that splits a roll-type starting material, such as a textile, paper, a plastic film to a narrow-width unit material (W) and winds the material unit (W) on the outer circumference of a paper pipe (P) in a roll type. According to the present invention, the friction shaft for slitter includes a first hole (101) arranged along the longitudinal direction of a winding axis (100) by penetration; multiple third holes (103) that lead to the first hole (101) from the outer circumference of the winding axis (100); and multiple holders (200) inserted into the inner circumference of the paper pipe (P) to be wound by the material unit (W), formed of short pipes to be sequentially inserted into the outer circumference of the winding axis (100), and installed at every position of the third holes (103). According to the present invention, the holder (200) can be inserted to the paper pipe (P) and pulled out from the paper pipe (P) by applying friction force to the paper pipe (P) through an elastic force of a spring (250) and eliminating the friction force by applying air pressure.

Description

Friction Shaft For Slitter}

The present invention relates to a shaft for a slitter, and more particularly, to a shaft for a slitter for individually winding a unit sheet cut from a slitter which is cut in a longitudinal direction while loosening a material wound in a roll form such as a fabric, Shaft assembly.

Slitter refers to a device that cuts along a longitudinal direction while unwinding a raw material wound in roll form, such as fabric, tributary, or synthetic resin film. The raw material is wound and supplied in the form of a roll while being cut into a plurality of unitary materials having a small width by the slitter.

In using the slitter, it is necessary to separately wind up the multiple unit pieces on the outer surface of the branch tube, and it is difficult to wind all the unit materials with a uniform torque with a single rotating shaft. If all the unitary materials are wound with a single axis of rotation, the unitary material wound on the branch tube is not constantly wound, some loosely wound and some tightened too tightly. Therefore, the former has a problem in that the roll can be released during the feeding process or the use process, and the latter has a problem that the unit material is broken or elongated. If an expensive film is stretched, the merchandise is lost and it can suffer great damage.

Therefore, a winding device for winding all the unit materials with a uniform torque is provided. The soccer component, which is important here, is usually referred to as Friction Shaft, and is often referred to as an air friction shaft because it uses pneumatic pressure.

Conventional friction shafts are proposed in Korean Patent Application No. 10-2003-7008607 (Prior Art 1) or 10-2007-0028723 (Prior Art 2).

According to the prior art 1, the case protrudes outward from the shaft while pressing the inner circumferential surface of the branch pipe against the inclined surface by hydraulic pressure. According to such a configuration, there is a problem that the foreign matter sticks between the inclined surfaces, and the case is fixed by the foreign matter.

According to the prior art 2, although the structure is such that the tube is expanded to project the lug, there may be a case where the air pressure leaks somewhere, or the tube hardens at a part and can not perform its function.

As described above, conventionally, there has been a general structure in which a frictional force is generated by pushing a paper tube with air pressure generated by a compressor. However, according to this structure, energy loss and mechanical frictional loss due to continuous generation of air pressure are caused, and even if the compressor is abnormal, there is a problem that when the product is continuously wound up, the product is defective.

It is an object of the present invention to solve the above problems and to provide a friction shaft for a slitter, which can stably hold a branch pipe without any problem due to supply of air pressure, minimizes a small gap in which foreign matter can be caught, And to provide a friction shaft for a slitter which can be improved. It is a main object of the present invention to provide a friction shaft for a slitter in which a frictional force can be generated without continuously generating air pressure by using a compressor.

The above-

A friction shaft for a slitter for tearing a raw material in the form of a roll such as a fabric, a tributary or a synthetic resin film with a small unitary material W and winding the unitary material W on the outer peripheral surface of the branch pipe P in the form of a roll, In this case,

A rod-shaped winding shaft (100) rotated by a winding motor (M); A first hole (101) provided in the winding shaft (100) along the longitudinal direction of the winding shaft (100) by perforation; And a plurality of third holes 103 (not shown) provided to be spaced from each other along the extending direction of the first hole 101. The third hole 103 is formed by perforation so as to pass from the outer circumferential surface of the winding shaft 100 to the first hole 101, );

And is fitted in the inner periphery of a branch pipe P for winding the unitary material W and is formed in the shape of a single pipe that is successively fitted on the outer periphery of the take-up shaft 100 and is provided for each position provided with the third hole 103 A plurality of holders (200); And a first pneumatic generator 300 for supplying compressed air to the first hole 101 to urge the holder 200 to apply pressure to the branch pipe P; The holder (200)

A plurality of lug receiving grooves 211 are provided along the outer periphery of the third hole 103 and a connecting hole 240 communicating with the third hole 103 and the lug receiving groove 211 is formed in the holder base 210); A lug 220 fitted in the lug receiving groove 211 so as to be able to start along the radial direction of the take-up shaft 100; The other end of the spring is supported by the lug 200 and the other end is supported by the lug seating groove 211 so that the lug 220 receives a force to elastically project along the radial direction of the take- (250); A fixed cover 260 fixed to the holder base 210 while pressing the outer side edge of the lug 220 so that the lug 220 does not escape from the lug receiving groove 211; Air pressure guide means for guiding the compressed air supplied to the first hole (101) to press the lug (220) toward the center of the take-up shaft (100);

, The holder (200) is provided with a frictional force to the branch pipe (P) by the elastic force of the spring (250).

"형태일 수 있다. According to another aspect of the present invention, the lug 220 includes the cap portion 220 and the flange portion 221,

"

According to still another aspect of the present invention,

The upper surface of the lug 220, which is in contact with the inner circumferential surface of the branch pipe P, is hemispherical, and may be an uneven surface.

According to still another aspect of the present invention,

A second hole 102 formed in the inside of the winding shaft 100 along the longitudinal direction of the winding shaft 100 separately from the first hole 101; And a plurality of fourth holes 104 (not shown) provided at intervals along the extending direction of the second holes 102, the holes being provided by perforations so as to pass from the outer circumferential surface of the take-up shaft 100 to the second holes 102, ); A second pneumatic pressure generator (301) for supplying compressed air to the second hole (102) to transmit air pressure to the fourth hole (104); The holder base 210 is installed on an extension of the fourth hole 104 and receives pressure outward along the radial direction of the take-up shaft 100 by the compressed air supplied to the second hole 102, And a holder pressing part 270 for pressing the inner peripheral surface of the holder.

According to still another aspect of the present invention,

Bearing seats 214 are provided on both sides of the holder base 210; And the ball bearing 280 may be mounted on the bearing seat 214 such that the inner surface of the holder base 210 is tightly fixed to the outer circumference of the take-up shaft 100 and the outer surface thereof supports the holder base 210.

According to the above configuration, the lug of the holder is always subjected to the force of being projected outward by the spring. Therefore, the lug supports the inner circumferential surface of the paper tube by a constant force, that is, by elastic force, so that the winding shaft grasps the paper tube with a constant force when the unit material is wound. The lug is actuated in the vertical direction by the spring, so that the operation is assured. The air pressure can be applied only when the paper tube is pulled out from the friction shaft after winding. Therefore, it is possible to use the air pressure to the minimum, and various problems related to the air pressure during the winding of the unit material are solved at once.

1 is a perspective view of a friction shaft assembly for a slitter according to an embodiment of the present invention.
2 is a partially exploded perspective view of a friction shaft assembly for a slitter according to an embodiment of the present invention.
3 is a partial cross-sectional view of the friction shaft assembly for a slitter taken along the line AA in Fig.
Fig. 4 is a partial cross-sectional view of a friction shaft assembly for a slitter taken along the line BB in Fig. 1, and Fig. 5 is a cross-sectional view of the partially disassembled state of Fig.
Fig. 6 is a sectional view corresponding to Fig. 3 for showing an operating state.
7 is a schematic plan configuration diagram of a slitter to which the present invention is applied.

First, the basic matters will be described with reference to FIG. 8 attached hereto, and then, the present invention will be described.

The slitter 1 slits the raw material W 'in the form of a roll such as a fabric, a tributary or a synthetic resin film with a knife 3 so as to be a small unit material W, In the form of a roll on the outer peripheral surface of the branch pipe. The slitter 1 includes a winding device 5 for winding up a vertically cut unit material and the core of the winding device 5 is a winding shaft 100 to which the present invention is directed. The rod-shaped winding shaft 100 is rotated by the winding motor M. The length of the take-up shaft 1 corresponds to the width L of the raw material, and therefore is not defined.

Hereinafter, the present invention will be described in detail with reference to the accompanying FIGS. 1 to 2 at the same time.

A first hole (101) and a second hole (102) are provided in the winding shaft (1) along the longitudinal direction thereof by drilling using a drill. The first hole (1) and the second hole (102) are independent from each other, so that the function of the flow path is individually performed.

A plurality of third holes 103 are provided by perforation so as to pass from the outer peripheral surface of the take-up shaft 100 to the first hole 101. The third holes 103 are provided at regular intervals along the extending direction of the first holes 101. The interval between the third holes 103 along the longitudinal direction of the take-up shaft 100 corresponds to the width of the unit work W, and the intervals may not be constant.

A plurality of fourth holes 104 are provided by perforation so as to pass from the outer peripheral surface of the take-up shaft 100 to the second hole 102. The fourth holes 104 are also spaced along the extending direction of the second holes 102.

The holder 200 in the shape of a single pipe is fitted on the outer periphery of the take-up shaft 100 along its longitudinal direction in turn. The holder 200 is disposed at each position where the third hole 103 is perforated. A thin ring-shaped spacer 290 is fitted between the holders 200. The spacer 290 is for maintaining a gap between the holders 200.

The first air pressure generating part 300 supplies compressed air to the first hole 101 to transmit the air pressure to the holder 200. The first pneumatic pressure generator 300 includes a known pneumatic means such as an air joint 320 for transmitting air pressure from the air compressor 310 and the air compressor to the first hole 101 can do. A first supply hole 111 for connecting the air joint 320 of the first air pressure generating part 300 to the first hole 101 is provided at the end of the take-up shaft 100 in the radial direction of the take- have.

Hereinafter, the holder 200 will be described in detail.

The holder 200 includes a single holder-type holder base 210 and a plurality of lugs 220 assembled along the periphery of the holder base 210. The holder base 210 is provided with a plurality of lug seating grooves 211 along the outer periphery thereof. The inner diameter of the holder base 210 is slightly larger than the outer diameter of the take-up shaft 100. Therefore, a cylindrical diffusion space 215 having a small thickness is provided between the holder base 210 and the take-up shaft. The diffusion space 215 serves as an air pressure guide means functioning to transfer compressed air formed by the first air pressure generating portion 300 to the lug 220.

The lug seating groove 211 is formed in a recessed groove at the upper portion of the holder base 210 and has a seating surface 211a facing upward so as to seat the lug 220 on the edge. The first packing 231 is held on both sides of the inner circumferential surface of the holder base 200 and the first packing 231 is for maintaining airtightness between the holder base 210 and the winding shaft 100.

A connection hole 240 is provided by bore to communicate the third hole 103 with the outer space of the holder 200. According to the embodiment of the present invention, the connection hole 240 is provided on the holder base 210. The connection hole 240 allows the compressed air supplied to the first hole 101 to communicate the lug 220 to the center of the take-up shaft 100 by allowing the third hole 103 and the outer space of the holder base 210 to communicate with each other. And its detailed operation will be described later.

"형태로 되어 있는 러그(220)는 권취축(100)의 반경방향을 따라 기동할 수 있도록 러그안착홈(211)에 끼워진다. 러그(220)와 러그안착홈(211) 간의 기밀유지를 위해 제2패킹(232)이 러그(220)의 플랜지부(221)의 측부에 끼워져 결합된다. 러그의 캡부(222)의 상면(222a)은 반구형으로 되어 있으며 지관(P)의 내주면을 압박하는 면이 된다. 캡부(222)의 상면(222a)은 마찰력을 높이기 위하여 요철면으로 되어 있다.
The term "

Shaped lug 220 is fitted into the lug receiving groove 211 so as to be able to start along the radial direction of the take-up shaft 100. In order to maintain the airtightness between the lug 220 and the lug receiving groove 211 The second packing 232 is fitted on the side of the flange portion 221 of the lug 220. The top surface 222a of the cap portion 222 of the lug is semispherical and is in contact with the surface The upper surface 222a of the cap portion 222 is an irregular surface in order to increase frictional force.

One end of the spring 250 is supported on the bottom surface 222b of the cap portion 222 of the lug 220 and the other end is interposed to be supported on the seating surface 211a of the lug seating groove 211. [ The spring 250 is a coil spring and allows the lug 220 to be urged to elastically project toward the radial direction of the take-up shaft 100.

The fixed cover 260 is fixed to the holder base 210 while pressing the upper surface of the flange portion 221 of the lug 220 so that the lug 220 does not come out of the lug receiving groove 211. The stationary cover 260 is rectangular in plan view and has a cylinder-shaped lug insertion hole 261 for passing the cap portion 222 of the lug 220 through the center thereof. The upper surface of the fixed cover 260 is curved so as to coincide with the circumferential surface of the holder 200. A bolt hole 263 for fastening the fastening bolt 262 is provided at each corner of the fastening cover 260. The fastening bolt 262 is screwed into the fastening bolt hole 262 of the holder base 210, (Not shown). A third packing 233 is fitted and coupled to the inner wall of the lug fitting hole 261 of the fixed cover 260 to maintain airtightness between the fixed cover 260 and the side wall of the cap portion 222 of the lug. A protruding step 264 is formed on the bottom surface of the fixed cover 260 along the circumferential direction.

A fourth packing 234 is inserted and coupled to the cover mounting tab 212 of the fixed cover 260 to maintain the airtightness between the fixed cover 260 and the holder base 210. A small gap 265 is present between the center of the bottom surface of the fixed cover 260 and the cover seating jaw 212 due to the projecting step 264 provided on the bottom surface of the fixed cover 260. The compressed air flowing into the third hole 103 through the gap 265 passes through the connection hole 240 to apply pressure to the upper surface of the flange portion 221 of the lug. The gap 240 also serves as an air pressure guide means functioning to deliver the compressed air formed by the first air pressure generating part 300 to the lug 220. The various packings described can be considered as a tool to assist the air pressure guide means.

The first air pressure generating part 300 supplies compressed air to the first hole 101 to transmit the air pressure to the holder 200. The first pneumatic generating part 300 may include a known pipe fitting means for transferring the air pressure from the air compressor and the air compressor to the first hole 101.

According to the embodiment of the present invention, the second air pressure generating portion 301 supplies the compressed air to the second hole 102 to transmit the air pressure to the fourth hole 104. The second air pressure generating part 301 supplies compressed air to the second hole 102 so that the air pressure is applied to the holder 200. The second pneumatic generator 301 may include known pipe fitting means for transferring the air pressure from the air compressor and the air compressor to the second hole 102. The second pneumatic generator 301 may share the first pneumatic generator 300 and some components, for example, the air compressor 310 and the air joint 320.

A first supply hole 112 for connecting the air joint 320 of the second air pressure generating portion 301 to the second hole 102 is provided at the end of the take-up shaft 100 in the radial direction of the take- have.

The fourth hole 104 may be formed of two sections 104a and 104b having different diameters along the longitudinal direction. The large-diameter section 104b has a cylindrical shape and a holder pressing part 270 is fitted. The holder pressing part 270 receives pressure outward along the radial direction of the take-up shaft 100 by the compressed air supplied to the second hole 102, thereby pressing the inner circumferential surface of the holder base 210. The holder pushing member 210 is for increasing the coupling force between the take-up shaft 100 and the holder base 210. The holder pushing member 210 has a rod shape and a fifth packing 235 is inserted at the intermediate point. The fifth packing 235 is for maintaining airtightness between the holder pushing member 210 and the fourth hole 104 of the take-up shaft 100.

On the other hand, bearing seats 214 are provided on both side edges of the holder base 210 so that the ball bearings 280 can be inserted and engaged. The inner surface of the ball bearing 280 is tightly fixed to the outer peripheral surface of the take-up shaft 100 and the outer surface of the ball bearing 280 supports the holder base 210. Therefore, when the holder pushing member 270 does not press the holder base 210, the holder base 210 can rotate relatively smoothly on the take-up shaft 100.

The ball bearing 280 helps the holder 200 to be centered in the center of the take-up shaft, i.e., to easily hold the center. The ball bearing 280 also allows the above-described diffusion space 215 to be formed only in a limited section, particularly in the center, with respect to the entire length of the holder base.

Hereinafter, the operation of the above arrangement will be described with reference to Figs. 3 and 6. Fig.

As shown in Fig. 6, the branch pipe P is fitted in the take-up shaft 100 in which the holder 200 is inserted. The state shown in Fig. 6 also occurs when the branch pipe P is pulled out. When the branch pipe P is inserted into or withdrawn from the take-up shaft, the first air pressure generating portion 300 should be operated so that the lug is drawn toward the center of the take-up shaft 100. This action causes the compressed air to push the flange portion 221 of the lug 220 downward from the top of the figure through the first hole 101, the third hole 103 and the connection hole 240. The air pressure generated by the first pneumatic pressure generator 300 is diffused into the diffusion space 215 provided on the outer peripheral surface of the take-up shaft 100 through the first hole 101 and the third hole 103. In other words, do. The air pressure acts on each lug 220 provided along the circumferential direction of the holder through the diffusion space 215 simultaneously. The cold air pressure in the diffusion space 215 pushes the upper surface of the flange portion 221 of the lug through each of the connection holes 240 and the respective gaps 265, To the center of.

When the operation of the first air pressure generating part 300 is stopped, the state shown in FIG. 3 is obtained. This state is a state in which the air pressure that presses the upper surface of the flange portion 221 of the lug 220 is removed. Accordingly, the spring 250 pushes each lug 220 toward the inner peripheral surface of the branch pipe P. The branch pipe P is rotated together with the take-up shaft 100 in the frictional force range corresponding to the elastic force of the spring 250.

Meanwhile, the second pneumatic pressure generating unit 301 can adjust the magnitude of the force that the holder pushing member 270 holds the holder 200 by adjusting the magnitude of the air pressure supplied to the second hole 102. This can be set so that the control unit controls according to various input conditions. A configuration for restoring the holder pressing portion 270 to the original position when the air pressure is removed is not necessary. It is only required to push the fifth packing 235 with a force enough to overcome the frictional force.

In some cases, the take-up shaft 100 is rotated, but the holder 200 may be stopped. The rotation speed of the take-up shaft 100 and the holder 200 may be different from each other. When the holder 200 is rotated with respect to the take-up shaft 100, the ball bearing 280 can impart quietness of rotation.

The configuration shown and described above is merely a preferred embodiment based on the technical idea of the present invention. It will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the present invention.

1: Slitter 3: Knife
5: winding device 100: winding shaft
101, 102, 103, 104: 1st, 2nd,
111, 112: first and second supply holes
200: holder 210: holder base
211: lug seating groove 212: cover seating chin
213: tapped hole 214: bearing seating part
215: diffusion space 220: rug
221: flange portion 222: cap portion
231, 232, 233, 234, 235: 1st, 2nd,
240: connection hole 250: spring
260: fixed cover 261: lug fitting ball
262: fastening bolt 263: bolt hole
264: protruding step 265:
270: Holder pressing part 280: Ball bearing
290: Spacers 300 and 301: First and second pneumatic pressure generators
310: Air Compressor 320: Air Joint
P: Branch tube W: Unit material

Claims (5)

A friction shaft for a slitter for tearing a raw material in the form of a roll such as a fabric, a tributary or a synthetic resin film with a small unitary material W and winding the unitary material W on the outer peripheral surface of the branch pipe P in the form of a roll, In this case,
A rod-shaped winding shaft (100) rotated by a winding motor (M); A first hole (101) provided in the winding shaft (100) along the longitudinal direction of the winding shaft (100) by perforation; And a plurality of third holes 103 (not shown) provided to be spaced from each other along the extending direction of the first hole 101. The third hole 103 is formed by perforation so as to pass from the outer circumferential surface of the winding shaft 100 to the first hole 101, );
And is fitted in the inner periphery of the branch pipe P for winding the unitary material W and is fitted in the outer periphery of the take-up shaft 100 in order and is provided for each position provided with the third hole 103 A plurality of holders (200); And a first pneumatic generator 300 for supplying compressed air to the first hole 101 to urge the holder 200 to apply pressure to the branch pipe P; The holder (200)
A plurality of lug receiving grooves 211 are provided along the outer periphery of the third hole 103 and a connecting hole 240 communicating with the third hole 103 and the lug receiving groove 211 is formed in the holder base 210); A lug 220 fitted in the lug receiving groove 211 so as to be able to start along the radial direction of the take-up shaft 100; The other end of the spring is supported by the lug 200 and the other end is supported by the lug seating groove 211 so that the lug 220 receives a force to elastically project along the radial direction of the take- (250); A fixed cover 260 fixed to the holder base 210 while pressing the outer side edge of the lug 220 so that the lug 220 does not escape from the lug receiving groove 211; Air pressure guide means for guiding the compressed air supplied to the first hole (101) to press the lug (220) toward the center of the take-up shaft (100);
Wherein the holder (200) applies a frictional force to the branch pipe (P) by an elastic force of the spring (250).
The lug (220) according to claim 1, wherein the lug (220) comprises a cap portion (220) and a flange portion (221)

Quot; shape. ≪ / RTI >
The method according to claim 1,
Characterized in that the upper surface of the lug (220) which is in contact with the inner peripheral surface of the branch pipe (P) has a hemispherical shape and further has an uneven surface.
The method of claim 1, wherein
A second hole 102 formed in the inside of the winding shaft 100 along the longitudinal direction of the winding shaft 100 separately from the first hole 101; And a plurality of fourth holes 104 (not shown) provided at intervals along the extending direction of the second holes 102, the holes being provided by perforations so as to pass from the outer circumferential surface of the take-up shaft 100 to the second holes 102, ); A second pneumatic pressure generator (301) for supplying compressed air to the second hole (102) to transmit air pressure to the fourth hole (104); The holder base 210 is installed on an extension of the fourth hole 104 and receives pressure outward along the radial direction of the take-up shaft 100 by the compressed air supplied to the second hole 102, And a holder pressing part (270) for pressing the inner circumferential surface of the sleeve (270).
[2] The apparatus according to claim 1, wherein bearing mounts (214) are provided at both side edges of the holder base (210); And a ball bearing 280 mounted on the bearing seat 214 so as to support the holder base 210. The ball bearing 280 is fixed to the outer peripheral surface of the take- Friction shaft for slitter.

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