Friction shaft for splitting machine capable of simultaneously realizing high-strength clamping and wide variable torque by utilizing air pressure supply channel

Abstract

The present invention relates to a friction shaft for a splitting machine, comprising: a rotating shaft in which an air supply channel is formed and a plurality of air supply holes are formed; the friction core includes: a core tube in which a through hole is formed, a slot is provided on the inner side, a plurality of exposed holes are formed on the outer surface, and a fitting portion is formed on the inner side; the bearings are arranged on the two sides of the through hole; the fixing rings are respectively positioned between the pair of fitting parts and the pair of bearings to form matching holes; a groove is formed in the outer surface, facing the fitting part, of the sealing ring; the pipe is positioned between the pair of sealing rings, covers the slot and ends, and an insertion part is formed on the outer surface of the pipe; the gaskets are arranged on the two sides of the through hole; the clamping pieces for clamping are arranged in the slots, the connecting holes and the exposure holes; and the spiral spring is arranged between the slot and the clamping piece for clamping. The clip piece for clamping includes: an insertion plate having a protruding portion formed thereon, and a fastening hole formed in the protruding portion; and the laminating plate is inserted into the exposure hole and is provided with a fastening hole. The spiral spring is arranged between the inserting groove and the inserting plate.

Description

Technical Field

[0001] The present invention relates to a friction shaft for a slitter, and more particularly to a friction shaft for a slitter that utilizes a single air pressure supply channel to simultaneously achieve high-strength clamping and a wide variable torque, enabling a winding tube to stably wind various raw materials such as paper, cloth, or film, cut into unit materials at predetermined intervals. Background Art

[0002] Generally speaking, a slitter is a device that cuts various raw materials such as paper, cloth, or film at predetermined intervals. In addition, a reel core is used to wind the multiple unit materials formed by the slitter into a roll form.

[0003] Therefore, in order to wind a plurality of unit materials such as various papers, cloths, or films around a core in a roll form, a friction shaft for a slitter is used that rotates the core by supplying compressed air.

[0004] In this regard, the friction shaft for a slitting machine provided by Patent Document 1 is characterized in that it includes: a core tube, which includes a rotating shaft and a plurality of friction cores, an air supply channel for supplying compressed air along the length direction is formed in the center of the rotating shaft, and the friction core is arranged on the rotating shaft in a manner that can rotate in situ. In order to ensure that compressed air can be supplied to each friction core, a plurality of air supply holes connected to the air supply channel are formed in the circumferential direction on the outside of the rotating shaft, a through hole is formed in the center of the friction core to be inserted into the rotating shaft in a through manner, a slot is arranged in a ring shape on the inner side facing the air supply hole, and a plurality of exposed holes connected to the slot through connecting holes are formed in the circumferential direction on the outside; bearings are arranged on both sides of the through hole; sealing rings are respectively located between the slot and a pair of bearings; a cylindrical tube. , which is located between a pair of sealing rings to cover the slot and close the end, and expands under the action of compressed air supplied from the air supply hole; a clamping clip, which is arranged in the slot, the connecting hole and the exposed hole, and under the pressure of the expanded tube, a part of it protrudes from the exposed hole and is tightly attached to the inner side surface of the wound tube; a washer, which fits tightly with the outer wheel of the bearing, and includes an elastic member arranged between the slot and the clamping clip to ensure that when the compressed air supply is interrupted, a part of the clamping clip can be reinserted into the exposed hole, an insertion part is formed on both sides of the outer side of the tube, and a fitting part inserted between a pair of insertion parts is formed on the inner side surface of the core tube along both sides of the slot, and the friction core is arranged between the bearing and the sealing ring; a fixing ring is arranged between the washer and the inserting part to ensure that the sealing ring can be fixed between it and the washer.

[0005] However, in the case of the patent document 1, since the sealing ring is not provided on the fixing ring and is not integrated with the fixing ring, if compressed air is supplied to the inside of the pipe, the sealing ring can be pressed toward the bearing side by the pressure of the compressed air, and the position can be changed.

[0006] Meanwhile, the pressurization of the fixing ring against the insertion portion of the pipe can become loose, and the compressed air can flow into the gap between the insertion portion of the pipe and the fixing ring, thereby possibly causing leakage to the outside of the friction shaft for a slitter.

[0007] Therefore, when the friction between the sealing ring and the rotating shaft does not increase compared to the supplied compressed air, during the winding operation, the friction core can have a slip phenomenon of slipping on the rotating shaft, and the winding operation of the winding pipe can also be difficult to be smoothly completed.

[0008] In addition, even if the supply of compressed air is increased, the force with which the friction core is fixed to the rotating shaft can not be proportionally increased as the supplied compressed air is increased.

[0009] Therefore, the winding tension of the winding pipe can also not be proportionally increased as the supplied compressed air is increased.

[0010] In addition, if the compressed air flows into the insertion slot of the core pipe through the gap between the insertion portion of the pipe and the fixing ring, the protrusion of the clamping clip from the exposed hole of the core pipe can not be easily achieved due to the influence of the inflowing compressed air.

[0011] Therefore, due to the poor adhesion between the clamping clip and the winding pipe, the fixation of the winding pipe becomes difficult, and thus the winding operation of the winding pipe can not be smoothly completed.

[0012] In summary, since the sealing force of the existing friction shaft for a slitter is decreased, a problem in performance can occur.

[0013] Prior Art Documents

[0014] Patent Documents

[0015] (Patent Document 0001) Patent Document 1: Domestic Registered Patent No. 10-2412913 (registered on June 21, 2022). SUMMARY

[0016] PROBLEMS TO BE SOLVED BY THE INVENTION

[0017] Therefore, the present application aims to provide a friction shaft for a slitting machine, which prevents a sealing ring from deviating from its original position under the pressure of compressed air supplied to the inside of a pipe, more effectively prevents leakage of compressed air through a gap between the pipe and a fixing ring than the prior art, and increases winding tension of a winding pipe in proportion to the supplied compressed air, thereby enabling the winding pipe to more stably wind unit materials formed by cutting various paper, cloth, or film materials at predetermined intervals.

[0018] Method for solving technical problem

[0019] To achieve the above object, the present application provides a friction shaft for a slitting machine, which simultaneously realizes high-strength clamping and wide variable torque using one air pressure supply passage, for a friction shaft for a slitting machine provided on the outside with a winding pipe winding unit materials formed by cutting various paper, cloth, or film materials at predetermined intervals in the form of a reel, comprising a rotating shaft having an air supply passage supplying compressed air in the length direction formed in the center thereof, and a plurality of friction cores provided on the rotating shaft in a manner capable of rotating in place, and a plurality of air supply holes connected to the air supply passage formed on the outside of the rotating shaft in the circumferential direction, to ensure that compressed air can be supplied to each of the friction cores. The friction core comprises a core pipe having a through hole into which the rotating shaft is inserted in a penetrating manner formed in the center, an insertion groove provided on the inside in a ring shape facing the air supply hole, a plurality of exposure holes connected to the insertion groove through connection holes formed on the outside in the circumferential direction, and a fitting portion formed on the inside along both sides of the insertion groove; a bearing provided on both sides of the through hole; a fixing ring having an insertion hole formed in the center between the pair of fitting portions and the pair of bearings; a sealing ring inserted into the insertion hole and combined with the fixing ring by injection molding, having a groove formed on the outside facing the fitting portion; a cylindrical pipe located between the pair of sealing rings to cover the insertion groove and end, having an insertion portion formed on both sides of the outside facing between the sealing ring and the fitting portion, and expanding under the action of compressed air supplied from the air supply hole; a gasket provided on both sides of the through hole to fit the outer rim of the bearing, pressurizing the fixing ring and the sealing ring toward the insertion portion; a clamping clip provided in the insertion groove, the connection hole, and the exposure hole, a part of which protrudes from the exposure hole under the pressurizing action of the expanded pipe, and tightly adheres to the inside of the winding pipe; and a coil spring provided between the insertion groove and the clamping clip to ensure that a part of the clamping clip can be reinserted into the exposure hole when the supply of compressed air is interrupted. The clamping clip comprises an insertion plate bent to be inserted into the insertion groove, having a protruding portion inserted into the connection hole formed on the outside, and a fastening hole formed on the outside of the protruding portion; and a fitting plate inserted into the exposure hole, having a fastening hole fastened to the fastening hole by a fastening member provided on the outside. The coil spring is provided between the insertion groove and the insertion plate.

[0020] Inventive Effects

[0021] The sealing ring and the fixing ring of the present application are combined by injection molding, and if compressed air is supplied to the inside of the pipe, the sealing ring does not change its position under the pressure of the compressed air and is not squeezed to the bearing side.

[0022] Also, since the pressure of the pipe insertion portion by the sealing ring and the fixing ring combined by injection molding does not become loose, the compressed air is prevented from leaking to the outside of the friction shaft for the slitting machine through the gap between the pipe insertion portion and the sealing ring combined by injection molding.

[0023] Therefore, under the pressure of the supplied compressed air, the friction between the sealing ring and the rotating shaft increases, and the slippage of the friction core on the rotating shaft during the winding operation is prevented, and the winding operation of the winding pipe is smoothly completed.

[0024] According to the present application, the position of the sealing ring does not change even under the pressure of the compressed air, and if the supply of the compressed air is increased, the force to fix the friction core on the rotating shaft also increases in proportion to the increase in the supply of the compressed air.

[0025] Therefore, the winding tension of the winding pipe increases in proportion to the increase in the supply of the compressed air.

[0026] According to the present application, by the pipe and the fixing ring and the sealing ring combined by injection molding that pressurizes the insertion portion of the pipe, the compressed air is prevented from flowing out to the insertion slot of the core pipe, and thus the fitting plate of the clamping clip can easily protrude from the exposed hole of the core pipe.

[0027] That is, the fitting plate of the clamping clip can easily protrude to the outside of the friction core under the action of the compressed air, and thus can be fitted to the winding pipe.

[0028] Therefore, compared to the prior art, the winding pipe can be more stably fixed to the clamping clip, and thus the winding pipe can more stably wind the unit material formed by cutting the raw material such as paper, cloth, or film at a predetermined interval.

[0029] According to the present application, since the first fitting portion of the sealing ring is fitted to the insertion portion of the pipe, the compressed air is prevented from leaking to the outside of the friction shaft for the slitting machine and the insertion slot of the core pipe.

[0030] According to the present application, the first fitting portion of the sealing ring can be prevented from being fitted to the inner side of the core pipe by the contact prevention portion of the fixing ring, and thus the sealing ring can be prevented from being caught in the inner side of the core pipe during assembly, and thus the assembly can be smoothly completed, and the sealing ring can also be prevented from being damaged by being caught in the inner side of the core pipe.

[0031] Meanwhile, the contact area between the sealing ring and the fixing ring can be increased by the contact between the first contact part of the sealing ring and the contact preventing part of the fixing ring, so that the sealing ring can be further fixed on the fixing ring by injection molding.

[0032] According to the present application, the second contact part of the sealing ring further extends to contact the rotating shaft, so that the contact area of the compressed air can be increased.

[0033] Therefore, the second contact part of the sealing ring is further pressed by the compressed air, so that it further contacts the rotating shaft, and the gap between the second contact part of the sealing ring and the rotating shaft can be further closed, and the leakage of the compressed air to the outside of the friction shaft of the slitting machine can be prevented.

[0034] Meanwhile, the friction between the second contact part of the sealing ring and the rotating shaft increases, so that the slip phenomenon of the friction core sliding on the rotating shaft during the winding operation can be further prevented.

[0035] According to the present application, if the supply of the compressed air is increased, the second contact part of the extended sealing ring will be deformed in proportion to the supplied compressed air, so as to contact the rotating shaft.

[0036] Therefore, the second contact part of the sealing ring is further extended and lengthened, and the contact area with the rotating shaft can be further increased, so that the range of adjusting the friction between the rotating shaft and the friction core and the range of adjusting the winding tension of the wound pipe can be expanded, and various papers, cloths or films requiring higher tension can be wound.

[0037] According to the present application, since the angle between the main body of the sealing ring and the second contact part is formed at 23°-35°, the size of the groove of the sealing ring can be designed to be smaller or larger.

[0038] That is, the area of the second contact part contacting the compressed air can be made narrower or wider.

[0039] Therefore, the degree of pressure of the compressed air on the second contact part of the sealing ring can be selected by setting the size of the groove, and the force of fixing the friction core on the rotating shaft can be selected.

[0040] According to the present application, the contact surface of the second contact part is in surface contact with the rotating shaft.

[0041] In addition, the pressure surface of the second contact part is pressed by the compressed air, so that the contact surface of the second contact part further contacts the rotating shaft.

[0042] Therefore, the gap between the second contact part of the sealing ring and the rotating shaft is further closed, and the force of fixing the friction core on the rotating shaft is increased.

[0043] According to the present application, the insertion plate and the fitting plate are fastened by the fastening member, and if the fitting plate is damaged due to the frictional force with the winding pipe, it can be separated and replaced.

[0044] According to the present application, the coil spring support is provided between the insertion slot and the insertion plate, and after the winding work is completed, the clamping jaw is easily returned to the original position.

[0045] According to the present application, the insertion plate is long in length and wide in width, and thus in order to fix the winding pipe, the area of the clamping jaw to which the pressure of the compressed air is transmitted becomes wider.

[0046] Therefore, the strength of the clamping jaw to fix the winding pipe becomes stronger even at a low compressed air pressure.

[0047] According to the present application, the fitting protrusion of the insertion portion which is pressed by the pressure of the fixing ring and the sealing ring combined by injection molding attempts to return to the original state by the elastic force, and thus the gap through which the compressed air flows out of the insertion slot is further sealed.

[0048] According to the present application, the fitting portion is inserted into the insertion slot formed between the insertion portion and the protrusion portion, and thus the pipe is further fixed to the inner side surface of the core pipe, and the gap through which the compressed air flows out of the insertion slot is further sealed.

[0049] According to the present application, the first protrusion portion or the second protrusion portion which is pressed by the pressure of the fixing ring and the sealing ring combined by injection molding attempts to return to the original state by the elasticity, and thus the gap through which the compressed air flows out of the insertion slot is further sealed. BRIEF DESCRIPTION OF DRAWINGS

[0050] Figure 1 is a diagram showing the arrangement state of a friction shaft for a slitting machine according to an embodiment of the present application;

[0051] Figure 2 is a front view of a friction shaft for a slitting machine according to an embodiment of the present application;

[0052] Figure 3 is a sectional view of a friction shaft for a slitting machine according to an embodiment of the present application;

[0053] Figures 4 to 10 is a partially enlarged sectional view and a detailed view of a friction shaft for a slitting machine according to an embodiment of the present application;

[0054] Figures 11 to 13 is a diagram showing the use state of a friction shaft for a slitting machine according to an embodiment of the present application;

[0055] Figures 14 to 19is a partial enlarged sectional view and a use state view of a friction shaft for a slitter according to a first modification of an embodiment of the present application;

[0056] Figure 20 and Figure 21 is a use state view of a friction shaft for a slitter according to a second modification of an embodiment of the present application;

[0057] Figure 22 and Figure 23 is a use state view of a friction shaft for a slitter according to a third modification of an embodiment of the present application;

[0058] Figure 24 and Figure 25 is a partial enlarged sectional view of a friction shaft for a slitter according to a fourth modification of an embodiment of the present application;

[0059] Figure 26 is a partial enlarged sectional view of a friction shaft for a slitter according to a fifth modification of an embodiment of the present application;

[0060] Figure 27 and Figure 28 is a partial enlarged sectional view of a friction shaft for a slitter according to a sixth modification of an embodiment of the present application;

[0061] Figure 29 and Figure 30 is a partial enlarged sectional view of a friction shaft for a slitter according to a seventh modification of an embodiment of the present application.

[0062] BRIEF DESCRIPTION OF DRAWINGS

[0063] 100: rotating shaft 110: air supply passage

[0064] 120: air supply hole 200: friction core

[0065] 210: core tube 211: through hole

[0066] 212: insertion slot 213: connection hole

[0067] 214: exposure hole 215: fitting portion

[0068] 220: bearing 230: fixing ring

[0069] 231: insertion hole 232: contact prevention portion

[0070] 240: sealing ring 241: main body

[0071] 242: first fitting portion 243: vertical portion

[0072] 244: second fitting portion 244a: fitting surface

[0073] 244b: Pressurized surface 245: Groove

[0074] 250: Tube 251: Insertion

[0075] 251a: Fitting protrusion 251b: First groove

[0076] 251c: First protrusion 251d: Second groove

[0077] 251e: Second protrusion 252: Insertion groove

[0078] 253: protrusion 260: washer

[0079] 270: Clamping clip 271: Insert plate

[0080] 271a: protrusion 271b: fastening hole

[0081] 272: Bonding plate 272a: Fastening hole

[0082] 280: Coil spring 1000: Friction shaft for slitting machine DETAILED DESCRIPTION

[0083] Hereinafter, the configuration of specific embodiments of the present invention will be described with reference to the accompanying drawings.

[0084] like Figures 1 to 30 As shown, the friction shaft 1000 for a slitting machine according to an embodiment and various modifications of the present invention is arranged on a slitting machine 2, and the slitting machine includes: a supply device 2b, which supplies raw materials 1 such as various papers, cloths or films wound in the form of a reel to a winding device 2a; a cutting device 2c, which cuts the raw materials 1 at predetermined intervals; and a winding device 2a, which winds the unit materials 1a formed by cutting the raw materials 1 at predetermined intervals into the form of a reel using a winding tube 3.

[0085] That is, the slitter friction shaft 1000 is provided on the winding device 2 a of the slitter 2 .

[0086] Here, before the raw material 1 becomes the unit material 1 a , the raw material 1 may have a plurality of shapes or patterns of the same design arranged therein by a printing operation.

[0087] At the same time, the unit material 1a is formed into multiple pieces, and the winding tube 3 is also constructed into multiple pieces corresponding thereto and is arranged outside the friction shaft 1000 for the slitter. The winding tube 3 is composed of a winding core, an FRP core, etc.

[0088] The winding device 2a includes a driving section 2a' including a driving motor or the like that rotates the slitter friction shaft 1000, and an air supply section 2a'' that is an air compressor or the like that supplies compressed air to the slitter friction shaft 1000.

[0089] As shown in FIG. 1, the slitter friction shaft 1000 according to an embodiment of the present application includes a rotating shaft 100 that is rotated by the driving section 2a', an air supply passage 110 that is formed in the inside center of the rotating shaft 100 and to which compressed air is supplied from the air supply section 2a'', and a plurality of friction cores 200 that are provided on the rotating shaft 100 in a manner that enables rotation in place, and that are provided with winding pipes 3 on the outside. Figures 1 to 13

[0090] Here, the plurality of friction cores 200 are maintained at intervals by an interval member provided on the rotating shaft 100, and are prevented from being removed from the in-place position by a fixing member provided on the rotating shaft 100, and the rotating shaft 100 is composed of a metal material or the like.

[0091] In order to ensure that compressed air can be supplied to each of the friction cores 200, a plurality of air supply holes 120 that are connected to the air supply passage 110 are formed on the outside of the rotating shaft 100 in the circumferential direction.

[0092] Here, the air supply holes 120 are formed in a plurality of numbers at intervals in the circumference of the rotating shaft 100.

[0093] The friction core 200 includes a core pipe 210 in which a through hole 211 that is inserted through the rotating shaft 100 is formed in the center, a slot 212 that is provided in a ring shape inside so as to face the air supply hole 120, a plurality of exposure holes 214 that are connected to the slot 212 through connection holes 213 and are provided on the outside in the circumferential direction, and a fitting portion 215 that protrudes from the inside along both sides of the slot 212.

[0094] Here, the connection holes 213 are formed to be smaller than the exposure holes 214, the exposure holes 214 are provided in a plurality of numbers at intervals in the circumference of the core pipe 210 in a manner that faces the air supply hole 120, and the core pipe 210 is composed of a metal material or the like.

[0095] The friction core 200 includes a bearing 220 that is provided on both sides of the through hole 211, a fixing ring 230 that is located between a pair of fitting portions 215 and a pair of bearings 220, respectively, and in which an insertion hole 231 is formed in the center, and a sealing ring 240 that is inserted into the insertion hole 231 and is combined with the fixing ring 230 by injection molding, and in which a groove 245 is formed on the outside that faces the fitting portion 215.

[0096] ​Here, the bearing 220 is provided in a ball bearing form, the fixed ring 230 is made of a metal material or the like, and the seal ring 240 is in a retainer form made of a rubber material or the like. The fixed ring 230 and the seal ring 240 are combined to form one body by a double injection method.

[0097] The friction core 200 includes a cylindrical tube 250 located between a pair of seal rings 240 to cover the insertion slot 212, and protruding from both sides to form an insertion portion 251 inserted between the seal rings 240 and the fitting portion 215, and expanding under the action of compressed air supplied from the air supply hole 120.

[0098] Here, the tube 250 is formed in a cylindrical form with a central opening through which the rotating shaft 100 passes, and is made of a rubber material or the like without being fitted to the rotating shaft 100.

[0099] The friction core 200 includes a gasket 260 provided on both sides of the through hole 211 to be fitted to the outer wheel of the bearing 220, and pressing the fixed ring 230 and the seal ring 240 toward the insertion portion 251.

[0100] Here, the gasket 260 is made of a metal material or the like without being tightly fitted to the rotating shaft 100 and the inner wheel of the bearing 220.

[0101] The friction core 200 includes a clamping clip 270 provided in the insertion slot 212, the connection hole 213, and the exposure hole 214, and a portion thereof protrudes from the exposure hole 214 to be tightly fitted to the inner side of the winding tube 3 under the pressing action of the expanded tube 250, and a coil spring 280 provided between the insertion slot 212 and the clamping clip 270 to ensure that a portion of the clamping clip 270 is reinserted into the exposure hole 214 when the supply of compressed air is interrupted.

[0102] Here, the clamping clip 270 and the coil spring 280 are made of a metal material or the like.

[0103] The clamping clip 270 includes an insertion plate 271 bent to be inserted into the insertion slot 212, and a protruding portion 271a protruding from the center of the outside to be inserted into the connection hole 213, and a fastening hole 271b formed on the outside of the protruding portion 271a, and a fitting plate 272 inserted into the exposure hole 214 and having a fastening hole 272a formed on the outside to be fastened to the fastening hole 271b by the fastening member 4.

[0104] Here, the fastening holes 271b, 272a are composed of nut portions, which ensure fastening with the bolt portions of the fastening members 4 such as screws, and the coil springs 280 are positioned between the insertion slots 212 and the insertion plate 271, which are respectively provided on both sides of the protruding portions 271a, and recesses for insertion and fixation of the coil springs 280 are respectively formed on the outer sides of the insertion slots 212 and the insertion plate 271.

[0105] The seal ring 240 includes a ring-shaped main body 241 inserted and fixed in the insertion hole 231 of the fixed ring 230, a first fitting portion 242 protruding from the outer side of the main body 241 to wrap the outer side of the fixed ring 230 opposite the insertion portion 251 and fit with the insertion portion 251, a vertical portion 243 protruding from the inner side of the main body 241 opposite the first fitting portion 242, a second fitting portion 244 obliquely protruding from one side of the vertical portion 243 to fit with the rotating shaft 100, and a recess 245 formed between the main body 241, the vertical portion 243, and the second fitting portion 244.

[0106] Here, a virtual line 5 is provided on the side end of the first fitting portion 242 closest to the insertion portion 251 and parallel to the first fitting portion 242, and the second fitting portion 244 cannot protrude from the virtual line 5.

[0107] A contact prevention portion 232 protruding from the outer side of the fixed ring 230 is formed to wrap the outer side of the first fitting portion 242 opposite the inner side of the core pipe 210.

[0108] Here, the first fitting portion 242 does not fit with the inner side of the core pipe 210 under the action of the contact prevention portion 232, the contact prevention portion 232 fits with the insertion portion 251 of the pipe 250, and the contact prevention portion 232 pressurizes the insertion portion 251 of the pipe 250 together with the first fitting portion 242.

[0109] The core pipe 210 includes a main body 210a formed with a through hole 211, an insertion slot 212, a connection hole 213, an exposure hole 214, and a fitting portion 215, and an outer cover 210b with the through hole 211, which is combined with the main body 210a to fix the bearing 220, the fixed ring 230 and the seal ring 240 combined by injection molding, the pipe 250, and the gasket 260 on the main body 210a.

[0110] As shown in Figures 1 to 13 The operation and effects of the friction shaft 1000 for the slitting machine according to the embodiment of the present application as constructed above will be described below.

[0111] In order to ensure that the various paper, cloth, or film, etc. raw materials 1 are cut at predetermined intervals to form a plurality of unit materials 1a, which are wound in a reel shape, a plurality of winding tubes 3 are inserted into the outside of the plurality of friction cores 200 of the friction shaft 1000 for a slitting machine.

[0112] In addition, compressed air is supplied to the air supply passage 110 of the rotating shaft 100 through the air supply portion 2a.

[0113] Then, the compressed air moves along the air supply passage 110 and is supplied into each friction core 200 through the plurality of air supply holes 120.

[0114] That is, the compressed air is supplied to the inside of the tube 250.

[0115] Here, the insertion slot 212 of the core tube 210 is covered by the tube 250, and thus the gap between the tube 250 and the insertion slot 212 is sealed.

[0116] In addition, the insertion portion 251 of the tube 250 is tightly attached to the attachment portion 215 of the core tube 210 by the fixing ring 230 and the sealing ring 240, which are combined by injection molding, and thus the gap between the tube 250 and the insertion slot 212 is further sealed.

[0117] Thus, the compressed air supplied to the inside of the tube 250 can be prevented from flowing out to the insertion slot 212 of the core tube 210.

[0118] In addition, the first attachment portion 242 of the sealing ring 240 is attached to the insertion portion 251 of the tube 250, and thus the gap between the first attachment portion 242 and the insertion portion 251 is sealed.

[0119] In addition, the sealing ring 240 is combined with the fixing ring 230 by injection molding, and thus is not pressed toward the bearing 220 side by the pressure of the compressed air supplied to the inside of the tube 250, and at the same time, the gap between the first attachment portion 242 and the insertion portion 251 is prevented from being broken.

[0120] Thus, the compressed air supplied to the inside of the tube 250 does not flow out to the outside of the friction shaft 1000 for a slitting machine through the gap between the first attachment portion 242 and the insertion portion 251 to the insertion slot 212 of the core tube 210.

[0121] In addition, the second attachment portion 244 of the sealing ring 240 is attached to the rotating shaft 100 by the compressed air flowing into the groove 245, and thus the gap between the second attachment portion 244 and the rotating shaft 100 is sealed.

[0122] Therefore, the compressed air supplied to the inside of the tube 250 does not flow out to the outside of the friction shaft 1000 for a slitting machine through the gap between the 2nd adhering portion 244 and the rotating shaft 100.

[0123] In addition, the tube 250 is expanded toward the insertion groove 212 by the compressed air supplied from the air supply hole 120, and the insertion plate 271 of the clamping clip 270 is pressurized.

[0124] Then, the insertion plate 271 moves toward the outside of the friction core 200 along the insertion groove 212 under the pressurization of the expanded tube 250, and the protruding portion 271a of the insertion plate 271 also moves toward the outside of the friction core 200 along the connection hole 213.

[0125] Here, since the compressed air does not flow out to the insertion groove 212, the insertion plate 271 receives the pressure of the compressed air that expands the tube 250 only from one side, and thus easily moves toward the outside of the friction core 200 along the insertion groove 212.

[0126] Meanwhile, the coil spring 280 is deformed and compressed under the action of the insertion plate 271.

[0127] In addition, the adhering plate 272 of the clamping clip 270 protrudes from the exposure hole 214 and is closely adhered to the inside of the winding tube 3 fixed to the friction core 200.

[0128] Then, the rotating shaft 100 is rotated by driving the driving portion 2a'.

[0129] Then, a plurality of the friction cores 200 rotate together with the rotating shaft 100 through the 2nd adhering portion 244 of the sealing ring 240 adhered to the rotating shaft 100 and the bearing 220.

[0130] In addition, a plurality of the winding tubes 3 rotate together with a plurality of the friction cores 200 by the friction between the adhering plates 272 of the clamping clips 270 closely adhered to the inner surfaces, and a plurality of the winding tubes 3 respectively wind a plurality of unit materials 1a using winding tension.

[0131] In addition, when a plurality of unit materials 1a are respectively wound in a roll shape on a plurality of the winding tubes 3, the supply of compressed air to the rotating shaft 100 is interrupted, and the driving of the driving portion 2a' is stopped.

[0132] Then, the tube 250 is contracted by the reduced compressed air and returns to the original state, and the adhering plate 272 of the clamping clip 270 is again inserted into the exposure hole 214 in the compressed state by the elasticity of the coil spring 280 that returns to the original state.

[0133] In addition, the close contact between the inner face of the winding pipe 3 and the contact plate 272 of the clamping clip 270 is released.

[0134] Therefore, the plurality of winding pipes 3 each of which has a plurality of unit materials 1a wound thereon are drawn out from the slitting machine friction shaft 1000 of the present application, thereby ending the winding work.

[0135] As shown in Figure 13 If the thickness and weight of the raw material 1 are large, the air supply passage 110 of the rotating shaft 100 is supplied with compressed air corresponding thereto, so that the winding tension of the winding pipe 3 is increased.

[0136] Then, the internal pressure of the pipe 250 is increased by the supplied compressed air, and the 2nd contact portion 244 of the sealing ring 240 is deformed by the compressed air inserted into the insertion groove 245, thereby making surface contact with the rotating shaft 100.

[0137] Therefore, the close contact area between the 2nd contact portion 244 of the sealing ring 240 and the rotating shaft 100 is increased, and the friction is increased, thereby further fixing the friction core 200 to the rotating shaft 100.

[0138] That is, the slitting machine friction shaft 1000 obtains the rotational force for increasing the winding tension of the winding pipe 3.

[0139] In addition, the pipe 250 further presses the insertion plate 271 of the clamping clip 270 under the action of the compressed air for further increasing the internal pressure.

[0140] In addition, the contact plate 272 of the clamping clip 270 further contacts the inner face of the winding pipe 3 by protruding from the exposure hole 214.

[0141] Therefore, as the pressure of the compressed air is increased, the winding tension of the winding pipe 3 is increased, and the plurality of winding pipes 3 each of which has a plurality of unit materials 1a wound thereon are wound on the plurality of unit materials 1a having a large thickness and weight by the increased winding tension.

[0142] As shown in Figures 14 to 19 In the slitting machine friction shaft 100 according to the 1st modified example of the embodiment of the present application, one side of the 2nd contact portion 244 in contact with the rotating shaft 100 is further elongated.

[0143] Here, a virtual line 5 is provided side by side with the 1st contact portion 242 at the end of one side of the 1st contact portion 242 closest to the insertion portion 251, and the further elongated 2nd contact portion 244 protrudes from the virtual line 5.

[0144] That is, as the one side of the second fitting portion 244 fitted to the rotating shaft 100 is extended, the second fitting portion 244 becomes longer than the embodiment of the present application.

[0145] In addition, the angle θ between the main body 241 and the second fitting portion 244 is formed to be 23° to 35°.

[0146] As shown in FIG. 2, if the compressed air flows into the recess 245 formed at the angle θ of 23° between the main body 241 and the second fitting portion 244, as the one side of the second fitting portion 244 fitted to the rotating shaft 100 is extended, the second fitting portion 244 becomes longer. Figure 14 Figure 15 As shown in FIG. 2, if the compressed air flows into the recess 245 formed at the angle θ of 23° between the main body 241 and the second fitting portion 244, as the one side of the second fitting portion 244 fitted to the rotating shaft 100 is extended, the second fitting portion 244 becomes longer.

[0147] Therefore, the second fitting portion 244 of the seal ring 240 is fitted to the rotating shaft 100 by being pressurized by the compressed air in contact with a wide area, thereby sealing the gap between the second fitting portion 244 and the rotating shaft 100.

[0148] As shown in FIG. 2, if the compressed air flows into the recess 245 formed at the angle θ of 23° between the main body 241 and the second fitting portion 244, as the one side of the second fitting portion 244 fitted to the rotating shaft 100 is extended, the second fitting portion 244 becomes longer. Figure 17 Figure 18 As shown in FIG. 2, if the compressed air flows into the recess 245 formed at the angle θ of 23° between the main body 241 and the second fitting portion 244, as the one side of the second fitting portion 244 fitted to the rotating shaft 100 is extended, the second fitting portion 244 becomes longer.

[0149] Here, since the size of the recess 245 formed at the angle θ of 23° between the main body 241 and the second fitting portion 244 is larger than the size of the recess 245 formed at the angle θ of 35° between the main body 241 and the second fitting portion 244, the area of the second fitting portion 244 in contact with the compressed air is further increased.

[0150] Therefore, the second fitting portion 244 of the seal ring 240 is fitted to the rotating shaft 100 by being further pressurized by the compressed air in contact with a wider area, thereby further sealing the gap between the second fitting portion 244 and the rotating shaft 100.

[0151] As shown in FIG. 2, if the compressed air flows into the recess 245 formed at the angle θ of 23° between the main body 241 and the second fitting portion 244, as the one side of the second fitting portion 244 fitted to the rotating shaft 100 is extended, the second fitting portion 244 becomes longer. Figure 16 As shown in FIG. 2, if the compressed air flows into the recess 245 formed at the angle θ of 23° between the main body 241 and the second fitting portion 244, as the one side of the second fitting portion 244 fitted to the rotating shaft 100 is extended, the second fitting portion 244 becomes longer.

[0152] Figure 19 ​​​If the angle θ between the main body 241 and the second abutting portion 244 is close to 35°, the pressure is further increased when the compressed air flows into the recess 245 formed at the angle θ, and the second abutting portion 244 of the seal ring 240 is deformed by the pressure of the compressed air and comes into surface contact with the rotating shaft 100.

[0153] Here, since the size of the recess 245 formed at the angle θ between the main body 241 and the second abutting portion 244 is larger than the size of the recess 245 formed at the angle θ of 23°, the area of the second abutting portion 244 in contact with the compressed air is further widened. Thus, the second abutting portion 244 is further deformed, and comes into surface contact with the rotating shaft 100 over a wider area.

[0154] Therefore, the friction between the second abutting portion 244 of the seal ring 240 and the rotating shaft 100 increases as the area of abutment increases, and the friction core 200 is further fixed to the rotating shaft 100.

[0155] As shown in Figure 20 and Figure 21 In the slitter friction shaft 1000 according to the second modified example of the embodiment of the present application, the outer surface of the further elongated second abutting portion 244 is formed with an abutting surface 244a that abuts against the rotating shaft 100.

[0156] That is, the abutting surface 244a comes into surface contact with the rotating shaft 100.

[0157] Further, the outer surface of the further elongated second abutting portion 244 is formed with a pressurizing surface 244b that is horizontally aligned with the outer surface of the rotating shaft 100 on the opposite side of the abutting surface 244a.

[0158] Therefore, the abutting surface 244a of the second abutting portion 244 comes into surface contact with the rotating shaft 100, and the pressurizing surface 244b of the second abutting portion 244 is pressurized by the compressed air to ensure that the abutting surface 244a is further pressurized to abut against the rotating shaft 100, and the gap between the second abutting portion 244 and the rotating shaft 100 is further sealed.

[0159] Therefore, the compressed air supplied to the inside of the tube 250 does not flow out to the outside of the slitter friction shaft 1000 through the gap between the second abutting portion 244 and the rotating shaft 100.

[0160] As shown in Figure 22 and Figure 23 In the slitter friction shaft 1000 according to the third modified example of the embodiment of the present application, the length of the insertion plate 271 in the circumferential direction of the core tube 210 is formed to be long to be close to the adjacent insertion plate 271.

[0161] That is, the length of each of the insertion plates 271 is formed long so that each of the insertion plates 271 approaches each other.

[0162] In addition, the width of the insertion plate 271 in the length direction of the core pipe 210 is formed wide so as to approach the width of the insertion slot 212.

[0163] Therefore, if compressed air is supplied to the inside of the pipe 250 through the air supply hole 120, the pipe 250 is expanded and presses the insertion plate 271 of the clamping clip 270.

[0164] Here, the insertion plate 271 is long in length and wide in width, and thus the area in contact with the expanded pipe 250 is wider than that of the embodiment of the present application.

[0165] Therefore, the area of the insertion plate 271 to which the pressure of the compressed air is transmitted is wider than that of the embodiment of the present application.

[0166] In addition, the fitting plate 272 of the clamping clip 270 protrudes from the exposure hole 214 through the insertion plate 271 whose pressure-transmitting area is raised by the pressure of the compressed air, and thus further tightly fits the inner side surface of the wrapped pipe 3 with greater force.

[0167] That is, the wrapped pipe 3 is further fixed to the friction core 200.

[0168] As shown in FIGS. 1 to 3, the friction shaft 100 for a slitting machine according to the embodiment of the present application is provided with a core pipe 210 having an insertion slot 212 formed therein, a clamping clip 270 having an insertion plate 271 inserted into the insertion slot 212 of the core pipe 210, and a fitting plate 272 of the clamping clip 270 protruding from the insertion slot 212 of the core pipe 210. Figure 24 Figure 25 As shown in FIGS. 1 to 3, the friction shaft 100 for a slitting machine according to the embodiment of the present application is provided with a core pipe 210 having an insertion slot 212 formed therein, a clamping clip 270 having an insertion plate 271 inserted into the insertion slot 212 of the core pipe 210, and a fitting plate 272 of the clamping clip 270 protruding from the insertion slot 212 of the core pipe 210.

[0169] In addition, the fitting protrusion 251a of the insertion portion 251 is deformed by the pressure of the fixing ring 230 and the sealing ring 240 combined by injection molding in a state of being supported by the fitting portion 215.

[0170] That is, the fitting protrusion 251a is pressed and collapsed.

[0171] Therefore, the gap between the insertion portion 251, the fitting portion 215, and the fixing ring 230 and the sealing ring 240 combined by injection molding is further sealed by the fitting protrusion 251a trying to restore the original state.

[0172] That is, the compressed air does not flow out to the insertion slot 212 of the core pipe 210.

[0173] As shown in FIGS. 1 to 3, the friction shaft 100 for a slitting machine according to the embodiment of the present application is provided with a core pipe 210 having an insertion slot 212 formed therein, a clamping clip 270 having an insertion plate 271 inserted into the insertion slot 212 of the core pipe 210, and a fitting plate 272 of the clamping clip 270 protruding from the insertion slot 212 of the core pipe 210. Figure 26 ​As shown, in the friction shaft 1000 for a slitter according to the fifth modified example of the embodiment of the present invention, a protrusion 253 is formed on the outer surface of the tube 250 to ensure that an insertion groove 252 is formed between the protrusion 253 and the insertion portion 251 .

[0174] In addition, the fitting portion 215 is inserted into the insertion groove 252 .

[0175] Therefore, the gap between the inserting portion 251 and the fitting portion 215 is further sealed by the protruding portion 253 .

[0176] That is, the compressed air does not flow out into the slot 212 of the core tube 210 .

[0177] In addition, as the fitting portion 215 is inserted into the insertion groove 252 , the tube 250 is further fixed inside the core tube 210 .

[0178] like Figure 27 and Figure 28 As shown, in the friction shaft 1000 for the slitting machine according to the sixth variant of the embodiment of the present invention, a first protrusion 251c is formed on the outside of the insertion portion 251 protruding toward the fitting portion 215 to ensure that a first groove 251b is formed between it and the insertion portion 251.

[0179] Here, the first protrusion 251 c is in contact with the contact portion 215 .

[0180] In addition, the first protrusion 251 c of the inserting portion 251 is supported by the fitting portion 215 , and the first groove 251 b is deformed by applying pressure to the fixing ring 230 and the sealing ring 240 combined by injection molding.

[0181] That is, the first protrusion 251c is squeezed and collapsed.

[0182] Therefore, the gaps among the inserting portion 251, the fitting portion 215, the fixing ring 230 and the sealing ring 240 combined by injection molding are further sealed by the first protrusion 251c trying to return to its original shape.

[0183] That is, the compressed air does not flow out into the slot 212 of the core tube 210 .

[0184] like Figure 29 and Figure 30 As shown, in the friction shaft 1000 for the slitting machine according to the 7th variant of the embodiment of the present invention, a second protrusion 251e is formed on the outside of the insertion part 251 protruding toward the opposite side of the bonding part 215 to ensure that a second groove 251d is formed between it and the insertion part 251.

[0185] Here, the second protrusion 251 e is in close contact with the fixing ring 230 and the sealing ring 240 .

[0186] In addition, when the insertion portion 251 is supported by the fitting portion 215 , the second protrusion 251 e is pressurized by the fixing ring 230 and the sealing ring 240 combined by injection molding, thereby deforming the second groove 251 d .

[0187] That is, the second protrusion 251e is squeezed and collapsed.

[0188] Therefore, the gaps among the inserting portion 251, the fitting portion 215, the fixing ring 230 and the sealing ring 240 combined by injection molding are further sealed by the second protrusion 251e trying to restore the original shape.

[0189] That is, the compressed air does not flow out into the slot 212 of the core tube 210 .

[0190] The present invention has been illustrated and described above by enumerating specific preferred embodiments. However, the present invention is not limited to the above embodiments. A person skilled in the art having general knowledge in the technical field to which the present invention belongs can make various changes and modifications without departing from the spirit of the present invention.

Claims

1. A friction shaft for a slitter with an air pressure supply passage for simultaneously achieving high strength clamping and wide variable torque, the friction shaft for a slitter being a friction shaft for a slitter in which a raw material (1) of various paper, cloth or film is cut at predetermined intervals to form unit materials (la) and is wound in a reel form, the friction shaft for a slitter comprising: a rotating shaft (100) in which an air supply passage (110) for supplying compressed air in a lengthwise direction is formed in the center thereof, and a plurality of friction cores (200) which are provided on the rotating shaft (100) in a manner capable of rotating in place, in order to ensure that compressed air is supplied to each of the friction cores (200), a plurality of air supply holes (120) connected to the air supply passage (110) are formed in a circumferential direction on the outside of the rotating shaft (100), the friction core (200) comprises: a core tube (210) in which a through hole (211) into which the rotating shaft (100) is inserted in a through manner is formed in the center thereof, a slot (212) which faces the air supply hole (120) is provided on the inside in a ring shape, a plurality of exposure holes (214) connected to the slot (212) through connection holes (213) are formed in a circumferential direction on the outside, and abutting portions (215) are formed on both sides of the slot (212) on the inside; bearings (220) which are provided on both sides of the through hole (211); a fixing ring (230) which is located between a pair of the abutting portions (215) and a pair of the bearings (220), respectively, and in which an insertion hole (231) is formed in the center thereof; a sealing ring (240) which is inserted into the insertion hole (231) and is combined with the fixing ring (230) by injection molding, and in which a groove (245) is formed on the outside facing the abutting portion (215); a cylindrical tube (250) which is located between a pair of the sealing rings (240) to cover the slot (212) and is closed on the outside, and in which insertion portions (251) which are inserted between the sealing rings (240) and the abutting portions (215) are formed on both sides of the outside, and which is expanded by the compressed air supplied from the air supply hole (120); a washer (260) which is provided on both sides of the through hole (211) to abut against the outer rim of the bearing (220), and which presses the fixing ring (230) and the sealing ring (240) toward the insertion portion (251); a clamping clip (270) which is provided in the slot (212), the connection hole (213) and the exposure hole (214), and a part of which protrudes from the exposure hole (214) to be in close contact with the inside of the winding tube (3) under the pressure of the expanded tube (250); and a coil spring (280) which is provided between the slot (212) and the clamping clip (270) to ensure that a part of the clamping clip (270) is reinserted into the exposure hole (214) when the supply of the compressed air is interrupted. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The clamping jaw (270) includes an insertion plate (271) which is bent to be inserted into the insertion slot (212), a protrusion (271a) formed on the outside thereof with an insertion connection hole (213) formed thereon, and a fastening hole (271b) formed on the outside of the protrusion (271a); a fitting plate (272) which is inserted into the exposure hole (214) and formed on the outside thereof with a fastening hole (272a) fastened with the fastening member (4) and the fastening hole (271b), The coil spring (280) is disposed between the insertion slot (212) and the insertion plate (271).

2. The friction shaft for a slitter according to claim 1, wherein the seal ring (240) includes a ring-shaped main body (241) inserted into the insertion hole (231) of the fixing ring (230), a first fitting portion (242) provided on the outside of the main body (241) to wrap the outside of the fixing ring (230) facing the insertion portion (251) and to fit the insertion portion (251), a vertical portion (243) provided on the inside of the main body (241) on the opposite side of the first fitting portion (242), a second fitting portion (244) formed on the side of the vertical portion (243) to be inclined and to fit the rotating shaft (100), and a groove (245) formed between the main body (241), the vertical portion (243), and the second fitting portion (244).

3. The friction shaft for a slitter according to claim 2, wherein a contact preventing portion (232) is formed on the outside of the fixing ring (230) to wrap the outside of the first fitting portion (242) facing the inside of the core pipe (210).

4. The friction shaft for a slitter according to claim 2, wherein the side of the second fitting portion (244) fitting the rotating shaft (100) is further elongated.

5. The friction shaft for a slitter according to claim 4, wherein the angle (θ) between the main body (241) and the second fitting portion (244) is 23° to 35°.

6. The friction shaft for a slitter according to claim 4, wherein a fitting surface (244a) fitting the rotating shaft (100) is formed on the outside of the second fitting portion (244).

7. The friction shaft for a slitter according to claim 6, wherein a pressurizing surface (244b) is formed on the opposite side of the fitting surface (244a) on the outside of the second fitting portion (244). ​ ​ ​ ​ ​ ​ 8. The friction shaft for a slitter simultaneously achieving high strength clamping and wide variable torque using one air pressure supply channel according to claim 1, wherein The length of the insertion plate (271) in the circumferential direction of the core pipe (210) is set to be long, close to the adjacent insertion plate (271), The width of the insertion plate (271) in the length direction of the core pipe (210) is set to be wide, close to the width of the insertion groove (212).

9. The friction shaft for a slitter simultaneously achieving high strength clamping and wide variable torque using one air pressure supply channel according to claim 1, wherein A fitting protrusion (251a) that fits with the fitting portion (215) is formed on the outside of the insertion portion (251).

10. The friction shaft for a slitter simultaneously achieving high strength clamping and wide variable torque using one air pressure supply channel according to claim 1, wherein A protrusion (253) is formed on the outside of the pipe (250) to secure an insertion groove (252) between the insertion portion (251), The fitting portion (215) is inserted into the insertion groove (252).

11. The friction shaft for a slitter simultaneously achieving high strength clamping and wide variable torque using one air pressure supply channel according to claim 1, wherein A first protrusion (251c) is formed on the outside of the insertion portion (251) toward the fitting portion (215) to secure a first recess (251b) between the insertion portion (251).

12. The friction shaft for a slitter simultaneously achieving high strength clamping and wide variable torque using one air pressure supply channel according to claim 1, wherein A second protrusion (251e) is formed on the outside of the insertion portion (251) toward the opposite side of the fitting portion (215) to secure a second recess (251d) between the insertion portion (251).

Images