CN114251346A - Friction shaft structure - Google Patents
Friction shaft structure Download PDFInfo
- Publication number
- CN114251346A CN114251346A CN202110761664.XA CN202110761664A CN114251346A CN 114251346 A CN114251346 A CN 114251346A CN 202110761664 A CN202110761664 A CN 202110761664A CN 114251346 A CN114251346 A CN 114251346A
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- Prior art keywords
- flange
- pressure
- chucking
- housing
- air
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/02—Shafts; Axles
- F16C3/023—Shafts; Axles made of several parts, e.g. by welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H18/00—Winding webs
- B65H18/08—Web-winding mechanisms
- B65H18/14—Mechanisms in which power is applied to web roll, e.g. to effect continuous advancement of web
- B65H18/16—Mechanisms in which power is applied to web roll, e.g. to effect continuous advancement of web by friction roller
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H19/00—Changing the web roll
- B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
- B65H19/30—Lifting, transporting, or removing the web roll; Inserting core
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
- B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
- B65H75/18—Constructional details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
- B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
- B65H75/18—Constructional details
- B65H75/22—Constructional details collapsible; with removable parts
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Unwinding Webs (AREA)
- Winding Of Webs (AREA)
Abstract
The present invention relates to a friction shaft structure which is applicable to a bobbin core having a large size, can appropriately adjust tension of a material at the time of rewinding, can uniformly transmit pressure to a pad part by forming a cylindrical groove part for receiving the pad part in a circular ring shape while minimizing occurrence of air leakage, thereby performing a chucking operation of the core with air pressure of a low pressure, can smoothly complete a returning operation of a flange after completing the chucking operation of the core, can minimize the number of parts by optimizing each constituent member constituting a friction shaft and thereby save manufacturing costs, and can reduce air consumption by improving a structure of a member for suppressing air leakage and a structure.
Description
Technical Field
The present invention relates to a friction shaft structure, and more particularly, to a friction shaft structure which is applicable to a bobbin core having a large size, can appropriately adjust tension of a material when rewinding, can uniformly transmit pressure to a pad part by forming a cylindrical groove part for receiving the pad part in a circular ring shape while minimizing occurrence of air leakage, and thereby perform a chucking operation of the core with a low pressure of air pressure, can smoothly complete a returning operation of a flange after completing the chucking operation of the core, can minimize the number of parts by optimizing each constituent part constituting a friction shaft, thereby saving manufacturing costs, and can improve a structure for reducing air consumption by improving the parts and structure for suppressing air leakage.
Background
In general, raw materials such as textile paper, film paper, and paper are wound into a cylindrical paper tube. When a raw material such as textile paper, film paper, or paper is wound into a paper tube by an automatic production line or when the raw material wound into the paper tube is unwound for use, the paper tube is fixed to a friction shaft.
Specifically, when the material is wound around the paper tube, the paper tube is fixed to the shaft so as to transmit the rotational force of the shaft to the paper tube, and when the material wound around the paper tube is unwound, the paper tube is fixed so as to be free from falling off the shaft but to be free to run (idle). A friction core (friction core) may use friction to secure the paper tube to the shaft.
In addition, in the conventional friction shaft disclosed in korean registered utility model No. 20-379171, the piston is moved by blowing compressed air from the air hole (air hole) of the center pillar, and the flange (lug) is protruded in the radial direction and rubbed with the paper tube by pushing the friction core to one side by the piston. Also, the flange will contract again when there is no more compressed air blow, thereby releasing the friction with the paper tube.
As a prior art relating to a conventional friction shaft, there is disclosed in korean registered patent publication No. 10-1232728 "friction shaft" (registration date: 2013.02.06), which is characterized by comprising: a piston case having an annular shape and inserted into a center pillar through which high-pressure air is injected through an air hole (air hole) in an outer circumferential surface; a plurality of first pistons inserted into the piston case and protruding in a direction in which a length of the center pillar is extended when high-pressure air is injected through the air holes; a first friction core embedded in the center post, elastically biased (bias) in a direction approaching the piston case, movable to a first position approaching the piston case and a second position spaced apart from the piston case by a protrusion of the first piston; a plurality of first flanges (lug) supported by inclined surfaces formed on the first friction core, protruding in a radial direction when the first friction core is in a first position, and being recessed in an opposite direction when the first friction core is in a second position; and a first step of surrounding said first friction core, provided with a plurality of first flange openings from which said first flange can protrude.
As a prior art relating to a conventional friction shaft, there is disclosed in korean registered patent publication No. 10-2009447 "friction shaft for slitter" (registration date: 2019.08.05), which is characterized in that: a friction shaft for a slitter, which is a winding tube mounted on an outer surface of the friction shaft for winding unit raw materials such as various papers, cloths or films in a roll form by cutting the raw materials at a predetermined interval, comprises a first rotating shaft rotated by a driving motor and receiving compressed air from an air supply part, a moving passage formed in the first rotating shaft and extending in a longitudinal direction of the first rotating shaft, first and second supply holes formed on one side of an outer surface and connected to the moving passage and receiving the compressed air, moving holes formed on an opposite side of the outer surface at a predetermined interval and connected to the moving passage at a predetermined interval along a circumference of the first rotating shaft, and moving holes formed on an opposite side of the outer surface along a longitudinal direction of the first rotating shaft and formed between the plurality of moving holes at a predetermined interval along a circumference of the first rotating shaft The movable hole is longer than the first discharge hole, a blocking ridge is formed at the tail end of the open side of the first discharge hole in a protruding mode, and a connecting hole used for connecting the movable channel and the first discharge hole is formed in the movable hole; a pipe installed in the first discharge hole and having a third supply hole connected to the connection hole; a plurality of torque brake discs which are installed adjacent to the first discharge hole, form a first friction part on the outer side surface, and form a blocking part blocked by a blocking ridge by protruding from the outer side surface at the periphery of the first friction part; a second rotating shaft movably installed along the moving channel, wherein a moving groove which is long along the length direction of the second rotating shaft at one side of the outer side surface and is in a circular shape and used for moving the compressed air supplied from the second supply hole into the connecting hole is formed in the second rotating shaft, and a first combining hole which faces the moving hole along the length direction of the second rotating shaft is formed at the opposite side of the outer side surface at a preset interval and at a certain interval along the circumference of the second rotating shaft; includes a pressurizing port exposed from the moving hole by being coupled to the first coupling hole; the winding device comprises a first rotary pipe, a second friction part, a first embedding space and a second embedding space, wherein a plurality of first rotary pipes are adjacently arranged on the outer side surface of a first rotary shaft along the length direction of the first rotary shaft, a coiling pipe is arranged on the outer side surface of the first rotary pipe, a second friction part which generates friction with the first friction part is formed in the first rotary pipe in a protruding mode from the inner side surface, the first embedding space and the second embedding space are respectively formed on two sides of the second friction part, an embedding hole is formed in one side surface of the second friction part facing the second embedding space at a preset interval along the circumference of the first rotary pipe, and a second discharging hole connected with the second embedding space is formed in the outer side surface at a preset interval along the circumference of the first rotary pipe; a second rotary pipe movably inserted into the second insertion space and installed on the outer side surface of the first rotary shaft, wherein a blocking hole facing the second discharge hole is formed in the outer side surface of the second rotary pipe at a predetermined interval along the circumference of the second rotary pipe, a first inclined surface is formed in the blocking hole, an insertion hole facing the insertion hole is formed in the outer side surface of the second rotary pipe at a predetermined interval along the circumference of the second rotary pipe, a blocking ridge is formed by protruding from one side of the inner side surface adjacent to the insertion hole, and a third insertion space is formed on the opposite side of the inner side surface; the first and second bearings are respectively embedded into the first and third embedding spaces and mounted on the outer side surface of the first rotating shaft in a manner of being respectively blocked by the second friction part and the blocking ridge; includes a first elastic member inserted into the insertion hole; a guide opening which is installed in the second discharge hole and is provided with a second inclined surface guided by the first inclined surface on one side of the outer side surface, a blocking hole on the opposite side of the outer side surface and a second combination hole on the outer side surface of the periphery of the blocking hole; a second elastic member simultaneously inserted into the blocking holes of the plurality of guide ports; a clamping flange installed at the second discharge hole and having a third coupling hole coupled to the second coupling hole by a coupling member; when the compressed air is supplied into the moving passage through the first supply hole, the second rotating shaft moves along the moving passage under the pressure of the compressed air and thereby the pressurizing port moves along the moving hole, and the moving pressurizing port sequentially pressurizes the second bearing and the second rotating pipe and guides the second inclined surface using the first inclined surface, so that the clamping flange is discharged from the second discharge hole and the discharged clamping flange is adhered to the inner side surface of the take-up pipe, and the pipe expands when the compressed air is supplied to the third supply hole of the pipe sequentially through the second supply hole and the moving groove and the connection hole, so that the first friction portion of the torque brake disc is discharged from the first discharge hole and adhered to the second friction portion of the first rotating pipe.
The conventional friction shaft for a slitter is difficult to maintain respective tensions in respective bobbins stably, and a curled thickness of a slit fabric and a film can be stably maintained only by maintaining respective tensions and clamping forces uniformly in respective bobbins, so that a large load may be formed at a friction surface due to air pressure for clamping the respective bobbins, and a problem of damage of a friction part member may occur frequently, and an air leakage may occur.
However, the conventional friction shaft requires a minimum of 2kgf/cm to perform the core chucking work2Pressure of (1) toThe tension control requires a larger air pressure (about 2.5 to 5 kgf/cm)2) And even if the air pressure is increased to 5kgf/cm2It is still difficult to maintain proper tension in the case of a large diameter.
Further, when it is necessary to release the chucking work by the air pressure supply as described above, there is a problem that the returning operation of the flange is not smooth, and since it is necessary to use many parts to maintain the high air pressure as described above, there is a problem that the manufacturing cost and the maintenance cost are high and the time required for assembly is long.
In the conventional friction shaft for a 3-inch bobbin, although the clamping and the clamping operation can be completed to some extent even with a small amount of air pressure, the problem described above is caused because high-pressure air pressure must be applied when the pressure is 6 inches or more.
Further, since the close portions of the respective members in the conventional friction shaft are made of a metal material, there is a possibility that damage to the friction surface due to high-pressure air and air leakage due to the insertion of foreign matter may frequently occur, and the air consumption may further increase when air leakage occurs as described above.
Prior art documents
Patent document
(patent document 1) Korean registered patent publication No. 10-1232728 "Friction shaft" (registration date: 2013.02.06)
(patent document 2) Korean registered patent publication No. 10-2009447 "Friction shaft for slitter" (registration date: 2019.08.05)
Disclosure of Invention
The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a friction shaft having an improved structure in which a core clamping operation can be performed with a relatively low air pressure while minimizing occurrence of air leakage, and a flange returning operation can be smoothly performed after the core clamping operation is completed.
Another object of the present invention is to provide a friction shaft structure which can minimize the number of parts by optimizing each constituent part constituting a friction shaft and thereby save manufacturing costs, and which can reduce air consumption by improving the structure and the parts for suppressing air leakage.
To achieve the above object, the present invention includes: a shaft body which is embedded in the core and has a gas supply passage for supplying gas from the inside to the outside; fixing frames fixedly coupled to both sides of the shaft main body, respectively; a plurality of pressurizing housings which are arranged between the shaft main body and the core at a certain interval, form air holes communicated with the supply flow path for receiving air in the supply flow path, are combined in a mode of surrounding the periphery of the shaft main body, and form a circular cylindrical groove part communicated with the air holes in one side; a pad part which moves in the side direction by the air pressure in the cylindrical groove part and is combined in a manner that a pressure pad arranged on one side surface contacts with the flange part when moving in the side direction and transmits pressure; a flange housing which moves in a lateral direction toward the support frame by means of the pressure pad and has a plurality of first inclined surfaces formed around an outer circumference thereof; a chucking device which is formed with a second inclined surface for being mounted on the first inclined surface of the flange housing and is provided with a plurality of flange members which are closely attached to the inner peripheral surface of the core on the outer side when the flange housing moves and perform a chucking operation; a restoring spring disposed between the flange housing and the support frame, for supporting a restoring operation of the flange housing after completing a chucking operation of the flange member and stopping supply of air pressure through the air hole; a coupling spring for restoring the plurality of flange parts to original positions after finishing the chucking action of the respective flange parts; and a support frame closely fixed to the flange housing and supporting the respective flange members in a lateral direction; wherein, the pad portion includes: a pad body accommodated in the cylindrical groove portion and having one side to which a plurality of the pressurizing pads are coupled by press-fitting at a certain interval from one side of the pressurizing housing; a fixing pin coupled to the pressurizing housing pin to prevent rotation of the other side of the pad body; and a sealing member that is fitted into and coupled to the gasket main body and contacts an inner circumferential surface inside the cylindrical groove portion.
In order to achieve the above object, the present invention includes: a shaft body which is embedded in the core and has a gas supply passage for supplying gas from the inside to the outside; fixing frames fixedly coupled to both sides of the shaft main body, respectively; a plurality of pressurizing housings which are arranged between the shaft main body and the core at a certain interval, form air holes communicated with the supply flow path for receiving air in the supply flow path, are combined in a mode of surrounding the periphery of the shaft main body, and form a circular cylindrical groove part communicated with the air holes in one side; a pad part which moves in the side direction by the air pressure in the cylindrical groove part and is combined in a manner that a pressure pad arranged on one side surface contacts with the flange part when moving in the side direction and transmits pressure; a flange housing which moves in a lateral direction toward the support frame by means of the pressure pad and has a plurality of first inclined surfaces formed around an outer circumference thereof; a chucking device which is formed with a second inclined surface for being mounted on the first inclined surface of the flange housing and is provided with a plurality of flange members which are closely attached to the inner peripheral surface of the core on the outer side when the flange housing moves and perform a chucking operation; a restoring spring disposed between the flange housing and the support frame, for supporting a restoring operation of the flange housing after completing a chucking operation of the flange member and stopping supply of air pressure through the air hole; a coupling spring for restoring the plurality of flange parts to original positions after finishing the chucking action of the respective flange parts; and a support frame closely fixed to the flange housing and supporting the respective flange members in a lateral direction; in the above-described clip tool, a plurality of flange members are coupled to the periphery of the outer circumference of the clip sleeve coupled to the outer side of the flange housing, the outer circumference of each flange member is formed with a curvature corresponding to the periphery of the outer circumference of the clip sleeve, a concave insertion groove into which the coupling spring is coupled is formed in the periphery of each flange member, and the second inclined surface is correspondingly formed in the inner side of each flange member so as to be in surface contact with the first inclined surface.
In order to achieve the above object, the present invention includes: a shaft body which is embedded in the core and has a gas supply passage for supplying gas from the inside to the outside; fixing frames fixedly coupled to both sides of the shaft main body, respectively; a plurality of pressurizing housings which are arranged between the shaft main body and the core at a certain interval, form air holes communicated with the supply flow path for receiving air in the supply flow path, are combined in a mode of surrounding the periphery of the shaft main body, and form a circular cylindrical groove part communicated with the air holes in one side; a pad part which moves in the side direction by the air pressure in the cylindrical groove part and is combined in a manner that a pressure pad arranged on one side surface contacts with the flange part when moving in the side direction and transmits pressure; a flange housing which moves in a lateral direction toward the support frame by means of the pressure pad and has a plurality of first inclined surfaces formed around an outer circumference thereof; a chucking device which is formed with a second inclined surface for being mounted on the first inclined surface of the flange housing and is provided with a plurality of flange members which are closely attached to the inner peripheral surface of the core on the outer side when the flange housing moves and perform a chucking operation; a restoring spring disposed between the flange housing and the support frame, for supporting a restoring operation of the flange housing after completing a chucking operation of the flange member and stopping supply of air pressure through the air hole; a coupling spring for restoring the plurality of flange parts to original positions after finishing the chucking action of the respective flange parts; and a support frame closely fixed to the flange housing and supporting the respective flange members in a lateral direction; wherein the shaft body comprises: and a groove portion formed by being recessed along a longitudinal direction at an outer circumference, and formed with a plurality of communication holes communicating with a supply flow path formed therein, so that air pressure of a uniform pressure is supplied from the supply flow path to an inner side of each cylindrical groove portion of each pressurizing housing.
The inclination angle of the first inclined plane relative to the horizontal line is 30-45 degrees.
The invention also includes: and an airtight ring member coupled to an outer circumference of the shaft main body, disposed inside the flange housing and the support frame, respectively, and having an O-ring coupled to one side and the other side, respectively.
The fixing frame is fixed by a fixing block coupled to one end and the other end of the shaft main body to prevent the separation.
A plurality of ball rollers for supporting a rotation of the core are disposed at a predetermined interval around an outer circumference of the support frame.
The cylindrical groove portion of the pressurizing housing of the present invention is concavely formed in a ring-shaped form, so that the gas supplied to the inside of the cylindrical groove portion through the gas hole can be uniformly transferred to the entire pad portion at a uniform pressure, thereby providing a sufficient chucking pressure at a lower air pressure.
In addition, in order to prevent the air leakage phenomenon which is frequently generated at the surface contact part of each component forming friction in the existing friction shaft structure, the invention provides an airtight ring component combined with an O-shaped ring between each component, thereby preventing the air leakage phenomenon by improving the air tightness, and completing the clamping action even by using air with lower pressure by reducing the air consumption.
In addition, according to the present invention, after the clamping operation is completed, the restoring operation of separating the flange housing from the support frame and releasing the surface contact state is performed by the plurality of restoring springs, and the plurality of flange members are separated from the inner circumferential surface of the core by the restoring elastic force of the coupling springs and perform the restoring operation to the original position, so that the clamping state between the flange members and the core is released, and thus the restoring operation of the flange members and the restoring operation of the pad portions can be smoothly completed.
Further, the present invention can perform the chucking and releasing operations on the plurality of bobbin cores with uniform pressure in the friction shaft for the slitter, so that even when the diameter of the bobbin is increased, the air pressure required for tension control can be satisfied with a low air pressure, the film or the cloth material can be wound with the same thickness, and the tension of the slit material can be stably maintained at the time of rewinding.
Drawings
Fig. 1 is a structural diagram illustrating an overall structure of a friction shaft structure to which the present invention is applied.
Fig. 2 is a main process diagram of the present invention.
Fig. 3 is a cross-sectional view of the fixing frame of the present invention.
Fig. 4 and 5 are a cross-sectional view and an oblique view of the pressurizing housing of the present invention.
Fig. 6 is a side view of fig. 4.
Fig. 7 is a cross-sectional view of a pad of the present invention.
Fig. 8 is a side view of fig. 7.
Fig. 9 is a sectional view illustrating the airtight ring member of the present invention.
Fig. 10 and 11 are a sectional view and a side view of the flange case of the present invention.
Fig. 12 is a schematic view illustrating a fastening tool equipped with the flange member of the present invention.
Fig. 13 is a use state diagram schematically illustrating a state before and after a clamping operation of the flange member of the present invention.
Fig. 14 is a schematic view illustrating a modification of the fastening tool of the present invention.
Fig. 15 and 16 are a side view and a cross-sectional view of the support frame of the present invention.
Fig. 17 is a sectional view showing a modification of the pressurizing housing of the present invention.
Fig. 18 is a schematic view illustrating a shaft main body of the present invention.
Description of the reference numerals
10: core(s)
100: shaft body
105: connecting joint
110: supply flow path
120: groove part
125: communicating hole
200: pressurized housing
205: air hole
210: cylindrical groove part
220: fixing hole
300: cushion part
305: mesopores
310: pad body
320: embedding hole
330: pressure pad
340: sealing member
350: fixing pin
400: flange casing
410: first inclined plane
500: clamping device
410: clamping sleeve
420: flange member
522: second inclined plane
524: embedded groove
600: supporting frame
610: ball roller
710: restoring spring
720: connecting spring
810: airtight ring member
820: o-shaped ring
850: bearing assembly
Detailed Description
In describing the present invention, when it is determined that detailed description on related known techniques or configurations may cause the gist of the present invention to become unclear, detailed description thereof will be omitted. In addition, terms used in the following are terms defined according to functions in the present invention, and may be changed according to user's intention, convention, and the like. Therefore, the definitions should be made based on the entire contents of the present specification. Further, when it is described that a certain constituent element is "included", unless otherwise specifically stated to the contrary, it is not meant to exclude other constituent elements, but means that other constituent elements may be included.
Next, a friction shaft structure to which the present invention is applied will be described with reference to fig. 1 to 18. The invention comprises the following steps: a shaft body 100 fitted into the core 10 and having a gas supply passage 110 formed therein for supplying gas from the inside to the outside; fixing frames 150 fixedly coupled to both sides of the shaft main body 100, respectively; a plurality of pressurizing housings 200 which are disposed between the shaft body 100 and the core 10 with a certain interval therebetween, which are coupled to each other so as to surround the outer circumference of the shaft body 100, and which have air holes 205 formed therein and communicating with the supply passage 110 so as to receive air from the inside of the supply passage 110, and which have circular cylindrical grooves 210 formed therein and communicating with the air holes 205; a pad unit 300 which moves in a lateral direction by the air pressure in the cylindrical groove 210, and is coupled to the flange unit 520 such that a pressure pad 330 provided on one side surface is in contact with the flange unit 520 when moving in the lateral direction; a flange housing 400 which is moved in a lateral direction toward the support frame 600 by the pressure pad 330 and has a plurality of first inclined surfaces 410 formed around the outer circumference; a chucking device 500 having a second inclined surface 522 formed to be seated on the first inclined surface 410 of the flange housing 400, and including a plurality of flange members 520 which are closely attached to the inner circumferential surface of the core 10 at the outer side when the flange housing 400 moves and perform a chucking operation; a restoring spring 710 disposed between the flange case 400 and the support frame 600, for supporting the restoring operation of the flange case 400 after the chucking operation of the flange part 520 is completed and the supply of the air pressure through the air hole 205 is stopped; a coupling spring 720 for restoring the plurality of flange parts 520 to original positions after finishing the chucking motion of the respective flange parts 520; and a support frame 600 closely fixed to the flange housing 400 and supporting the respective flange members 520 in a lateral direction.
Referring to fig. 1 and 2, the shaft body 100 has a structure in which a supply flow path 110 is formed inside along a longitudinal direction in order to transmit external air pressure, and a connection joint for connecting an external air supply pipe is coupled to an end of the supply flow path 110.
As shown in fig. 1 and 18, the shaft main body 100 includes: the groove portion 120 is formed to be recessed along a longitudinal direction at an outer circumference, and a plurality of communication holes 125 communicating with the supply flow path 110 formed therein are formed, so that air pressure of a uniform pressure is supplied from the supply flow path 110 to the inside of each cylindrical groove portion 210 of each pressurizing housing 200.
The restoring springs 710 are disposed between the flange case 400 and the support frame 600 to be contracted when the flange case 400 is moved in a lateral direction by air pressure and expanded to be restored to an original volume when the air pressure is removed, thereby providing a restoring moving force to one side of the flange case 400.
As shown in fig. 1 and 3, the fixing frames 150 coupled to one end and the other end of the plurality of shaft main bodies 100, respectively, are fixed by the fixing blocks 130 coupled to the one end and the other end of the shaft main bodies 100 to prevent the detachment.
The side surface of the fixing frame 150 is adjacent to and combined with a pressurizing housing 200, and the pressurizing housing 200 adopts a structure in which the groove portion 120 communicates with the air hole 205 in order to supply the air supplied from the inside of the groove portion 120 to the inside of the cylindrical groove portion 210.
As shown in fig. 4 and 5, the pressurizing housing 200 is configured such that a cylindrical groove portion 210 for receiving the pad 300 to be movable in both left and right directions is recessed in a ring shape on one side, and a fixing hole 220 for allowing a fixing pin 350 to be inserted is formed on an inner wall of the cylindrical groove portion 210 to prevent the pad 300 from rotating.
An annular groove for uniformly supplying the air supplied through the supply flow path 110 and the groove portion 120 to the inside of the cylindrical groove portion 210 is concavely formed around the inner circumferential surface of the pressurized casing 200.
The annular grooves function as spaces into which gas supplied from the supply flow path 110 through the groove portions 120 can be filled, and since air is supplied from the annular grooves filled with air to the cylindrical groove portions 210 through the air holes 205, air of uniform pressure can be supplied into the interior of the plurality of cylindrical groove portions 210, and since the plurality of communication holes 125 communicating with the annular grooves are formed, as shown in fig. 6, uniform moving pressure can be transmitted to the entire periphery of the pad portion 300.
Referring to fig. 7 and 8, the pad 300 includes: a pad body 310 which is accommodated in the cylindrical groove 210 and has one side to which the plurality of pressure pads 330 are coupled by press-fitting at a predetermined interval from one side of the pressure housing 200; a fixing pin 350 pin-coupled to the pressurizing housing 200 at the other side of the pad body 310 to prevent rotation; and a sealing member 340 fitted into and coupled to the gasket main body 310 and contacting an inner circumferential surface of the inside of the cylindrical groove portion 210.
An insertion hole into which the fixing pin 350 is inserted is formed at the other side of the pad body 310.
The pad body 310 is formed in a ring shape having a central hole 305 in the center into which the shaft body 100 is inserted, and has a structure in which a sealing member 340 is coupled to the center between one side and the other side.
The sealing member 340 may be interposed between the pad body 310 and the cylindrical groove portion 210 when the pad unit 300 is received in the cylindrical groove portion 210, thereby functioning to prevent an air leakage phenomenon when the pad unit 300 performs a lateral movement and a reset operation.
Further, the present invention includes an airtight ring part 810 for maintaining an airtight state in order to prevent an air leakage phenomenon between the respective parts.
As shown in fig. 2 and 9, the air seal ring member 810 is coupled to the outer circumference of the shaft body 100, is disposed inside the flange housing 400 and the support frame 600, and has a structure in which O-rings 820 are coupled to one side and the other side, respectively.
The air tight ring part 810 can prevent an air leakage phenomenon by maintaining air tightness between the gasket housing and the flange housing 400 and air tightness between left and right side portions of the bearing 850.
Referring to fig. 10 and 11, the flange case 400 is movable in a lateral direction toward the support frame 600 by the pressure pad 330, and a plurality of first inclined surfaces 410 are formed at positions spaced apart around the outer circumference.
The first inclined surface 410 is formed at an inclination angle of 30 to 45 ° with respect to a horizontal line so that a large pressurizing force can be applied to the flange member 520 side with a low air pressure, thereby more stably transmitting the force to the flange member 520 side.
Referring to fig. 12 and 13, in the chucking device 500 of the present invention, a plurality of flange members 520 are coupled to the outer circumference of the chucking sleeve 510 coupled to the outside of the flange housing 400, the outer circumferential surfaces of the flange members 520 are formed with a curvature corresponding to the outer circumference of the chucking sleeve 510, a concave fitting groove 524 into which the coupling spring 720 is coupled is formed at the outer circumference of the flange members 520, and the second inclined surface 522 is correspondingly formed at the inner side of the flange members 520 so as to be in surface contact with the first inclined surface 410.
Fig. 12 is a side view of the clamp sleeve 510 coupled to the flange member 520 of the present invention, and a structure in which a space for accommodating the flange housing 400 is formed on one side is employed.
The chucking sleeve 410 is coupled in a manner of surrounding the outer side of the flange outer case 400, and the outer circumference of the flange part 520 is formed in a manner corresponding to the curvature of the outer circumference of the chucking sleeve 510, and in a general state where no force is transmitted from the pressurizing pad 330, as shown in (a) of fig. 13, is located at a certain interval from the inner circumferential surface of the core 10, and in contrast, when air pressure is transmitted to the cushion part 300 through the air flow dew 110, as shown in (b) of fig. 13, the force transmitted from the pressurizing pad 330 is transmitted to the side of each flange part 520 through the first inclined surface 410 of the flange outer case 400, so that each flange part 520 comes into contact with the side of the inner circumferential surface of the core 10 and thereby performs a chucking function.
At this time, the flange member 520 may cause the second inclined surface 522 to slidably move upward along the first inclined surface 410 when the flange housing 400 moves in the lateral direction.
A plurality of flange members 420 are disposed around the outer circumference of the locking bushing 510 in a divided form, and the coupling spring 720 is fitted into the fitting groove 524 of the plurality of flange members 420.
The coupling spring 720 may perform a function of coupling a plurality of flange members 520 disposed at the outer circumference of one chucking sleeve 510 and restoring to an original position after the chucking action of the flange members 520 is completed.
Fig. 14 is a schematic view illustrating a modified example of the fastening tool 500 of the present invention, and illustrates a state in which a larger number of flange members 520 are arranged than the flange members 520 of the fastening tool 500 described above.
Referring to fig. 15 and 16, the support frame 600 of the present invention has a structure in which a through hole into which the shaft body 100 is inserted is formed at the center and a plurality of ball rollers 610 are arranged around the outer shaft at a certain interval.
The ball roller 610 can support the rotation of the core 10, so that the winding and unwinding of the materials such as the textile paper, the film paper, the paper, etc. can be more easily performed.
The ball roller 610 is fixed by a headless bolt coupled in a lateral direction.
The support frame 600 has a structure in which an air seal ring member 810 is disposed between the center inner portion and the shaft body 100, and bearings 850 are coupled to the left and right sides.
Fig. 17 is a schematic view illustrating a modification of the pressurized housing 200 according to the present invention, in which cylindrical groove portions 210 are formed on one side and the other side so that the pad members 300 can be disposed on both left and right sides of the one side and the other side, respectively, and fixing pins 350 for preventing the pad members 300 received in the cylindrical groove portions 210 on both left and right sides from rotating are coupled to the fixing holes 220, and the fixing holes 200 are communicated with each other on both left and right sides.
In the present invention configured as described above, when air is supplied to the supply flow path 110 side of the shaft main body 100 for chucking work on the core 10 (bobbin) for performing winding and rewinding works of cloth, film, or the like, the air inside the supply flow path 110 is supplied to the inside of the groove portion 120 through the communication hole 125, and further supplied to the inside of the cylindrical groove portion 210 of the pressurizing housing 200 through the air hole 205, so that the pad part 300 is moved to the flange housing 400 side by the pressure of the air and transmits pressurizing force to the flange housing 400 side, and then the flange housing 400 is moved to the support frame 600 side and transmits force to the second inclined surface 522 side in surface contact with the first inclined surface 410 of the flange housing 400, so that the flange part 520 is closely attached to the inner circumferential surface of the core 10.
At this time, since the restoring spring 710 is disposed in plural between the flange case 400 and the support frame 600, the restoring spring 710 contracts when the flange case 400 moves in the lateral direction by the air pressure, expands and restores to its original volume when the air pressure disappears, and thereby provides a restoring moving force to the flange case 400 side.
Thereby, the plurality of flange parts 520 may be adhered to the inner circumferential surface of the core 10, thereby stopping the rotation of the core 10 by means of a frictional force and thereby performing a chucking action.
Further, when the air pressure is released after the completion of the chucking motion as described above, the respective flange members 520 are returned to the original positions by the coupled coupling springs 720, so that the close contact state between the flange members 520 and the inner circumferential surface of the core 10 is released and the chucking motion is released by being separated from each other.
The shaft main body 100 of the present invention can transmit uniform air pressure to each pad part 300 through the supply flow path 110 and the groove part 120, and thus can be applied to a bobbin of 6 inches or more, and can bring the pressing pad 330 into close frictional contact with the flange outer case 400 and move the flange outer case 400 when the pad part 300 moves, and the moving force thereof can bring the flange part 520 of the chucking tool 500 into close contact with the core 10 side to the outside by the first and second inclined surfaces when the flange outer case 400 moves, thereby providing sufficient frictional force and thus chucking the core 10.
The first and second inclined surfaces 410 and 522 are formed at an inclination angle of about 30 to 45 degrees as described above, so that the force can be easily transmitted, and thus a sufficient chucking pressure can be provided even with a low air pressure.
In particular, the cylindrical groove portion 210 of the pressurized housing 200 of the present invention is concavely formed in a ring-shaped form, so that the gas supplied to the inside of the cylindrical groove portion 210 through the gas hole 205 can be uniformly transmitted to the entire pad portion 300 at a uniform pressure, thereby providing a sufficient chucking pressure at a lower air pressure.
In addition, in order to prevent the air leakage phenomenon which is frequently generated at the surface contact part of each component which forms friction in the conventional friction shaft structure, the airtight ring member 810 which is combined with the O-ring 820 is arranged between each component, so that the air leakage phenomenon can be prevented by improving the airtightness, and the clamping action can be completed even by using air with lower pressure by reducing the air consumption.
In addition, according to the present invention, after the clamping operation is completed, the restoring operation of separating the flange housing 400 from the support frame 600 and releasing the surface contact state is performed by the plurality of restoring springs 710, and the plurality of flange members 520 are separated from the inner circumferential surface of the core 10 by the restoring elastic force of the coupling springs 720 and perform the restoring operation to the original position, so that the clamping state between the flange members 520 and the core 10 is released, and thus the restoring operation of the flange members 520 and the restoring operation of the pad parts 300 can be smoothly completed.
Further, the present invention can perform the chucking and releasing operations of the plurality of bobbin cores 10 at uniform pressure in the friction shaft for the slitter, respectively, so that even when the diameter of the bobbin is increased, the air pressure required for tension control can be satisfied by a low air pressure, and the material such as the textile paper, the film paper, and the paper can be wound at the same thickness, and the tension of the slit material can be stably maintained at the time of rewinding.
As described above, the specific embodiments of the present invention have been described in the detailed description of the present invention, but the present invention can be variously modified within a range not departing from the scope thereof. Therefore, the scope of the present invention should not be limited to the embodiments described in the above-mentioned contents, but should be defined by the appended claims and the scope equivalent to the claims.
That is, the present invention is not limited to the specific preferred embodiments described above, and those having ordinary knowledge in the art to which the present invention pertains can be variously modified and implemented without departing from the gist of the present invention claimed in the claims, and the modifications described above are included in the scope of the claims.
Claims (7)
1. A friction shaft structure, comprising:
a shaft body (100) that is fitted into the core (10) and that forms a supply channel (110) for gas that is supplied from the inside to the outside;
fixing frames (150) fixedly coupled to both sides of the shaft main body (100), respectively;
a plurality of pressurizing housings (200) which are arranged between the shaft main body (100) and the core (10) with a certain interval, form an air hole (205) communicated with the supply flow passage (110) for receiving air in the supply flow passage (110), are combined in a mode of surrounding the periphery of the shaft main body (100), and form a circular cylindrical groove part (210) communicated with the air hole (205) in one side;
a pad part (300) which moves in the side direction by the air pressure in the cylindrical groove (210) and is combined in a manner that a pressure pad (330) arranged on one side surface contacts with the flange part (520) when moving in the side direction and transmits a pressure;
a flange housing (400) which is moved in a lateral direction toward the support frame (600) by the pressure pad (330) and has a plurality of first inclined surfaces (410) formed around the outer periphery thereof;
a chucking tool (500) which is formed with a second inclined surface (522) so as to be seated on the first inclined surface (410) of the flange housing (400), and which is provided with a plurality of flange members (520) which are brought into close contact with the inner peripheral surface of the core (10) on the outside when the flange housing (400) is moved, and which perform a chucking operation;
a restoring spring (710) disposed between the flange case (400) and the support frame (600) for supporting a restoring action of the flange case (400) after completing a chucking action of the flange part (520) and stopping the supply of the air pressure through the air hole (205);
a coupling spring (720) for restoring the plurality of flange parts (520) to original positions after finishing the chucking action of the respective flange parts (520); and the number of the first and second groups,
a support frame (600) closely fixed to the flange housing (400) and supporting the respective flange members (520) in a lateral direction.
The pad (300) comprising: a pad body (310) which is accommodated in the cylindrical groove (210) and has one side to which the plurality of pressure pads (330) are press-fitted with a predetermined interval from one side of the pressure housing (200); a fixing pin (350) pin-coupled to the pressurizing housing (200) on the other side of the pad body (310) to prevent rotation; and a sealing member (340) that is fitted into the gasket main body (310) and contacts the inner circumferential surface of the cylindrical groove (210).
2. A friction shaft structure, comprising:
a shaft body (100) that is fitted into the core (10) and that forms a supply channel (110) for gas that is supplied from the inside to the outside;
fixing frames (150) fixedly coupled to both sides of the shaft main body (100), respectively;
a plurality of pressurizing housings (200) which are arranged between the shaft main body (100) and the core (10) with a certain interval, form an air hole (205) communicated with the supply flow passage (110) for receiving air in the supply flow passage (110), are combined in a mode of surrounding the periphery of the shaft main body (100), and form a circular cylindrical groove part (210) communicated with the air hole (205) in one side;
a pad part (300) which moves in the side direction by the air pressure in the cylindrical groove (210) and is combined in a manner that a pressure pad (330) arranged on one side surface contacts with the flange part (520) when moving in the side direction and transmits a pressure;
a flange housing (400) which is moved in a lateral direction toward the support frame (600) by the pressure pad (330) and has a plurality of first inclined surfaces (410) formed around the outer periphery thereof;
a chucking tool (500) which is formed with a second inclined surface (522) so as to be seated on the first inclined surface (410) of the flange housing (400), and which is provided with a plurality of flange members (520) which are brought into close contact with the inner peripheral surface of the core (10) on the outside when the flange housing (400) is moved, and which perform a chucking operation;
a restoring spring (710) disposed between the flange case (400) and the support frame (600) for supporting a restoring action of the flange case (400) after completing a chucking action of the flange part (520) and stopping the supply of the air pressure through the air hole (205);
a coupling spring (720) for restoring the plurality of flange parts (520) to original positions after finishing the chucking action of the respective flange parts (520); and the number of the first and second groups,
a support frame (600) closely fixed to the flange housing (400) and supporting the respective flange members (520) in a lateral direction.
In the chucking device (500), a plurality of flange members (520) are coupled around the outer circumference of a chucking sleeve (510) coupled to the outside of the flange housing (400), the outer circumferential surface of each flange member (520) is formed with a curvature corresponding to the outer circumference of the chucking sleeve (510), a recessed fitting groove (524) to which the coupling spring (720) is coupled is formed in the outer circumference of each flange member (520), and the second inclined surface (522) is correspondingly formed inside each flange member (520) in surface contact with the first inclined surface (410).
3. A friction shaft structure, comprising:
a shaft body (100) that is fitted into the core (10) and that forms a supply channel (110) for gas that is supplied from the inside to the outside;
fixing frames (150) fixedly coupled to both sides of the shaft main body (100), respectively;
a plurality of pressurizing housings (200) which are arranged between the shaft main body (100) and the core (10) with a certain interval, form an air hole (205) communicated with the supply flow passage (110) for receiving air in the supply flow passage (110), are combined in a mode of surrounding the periphery of the shaft main body (100), and form a circular cylindrical groove part (210) communicated with the air hole (205) in one side;
a pad part (300) which moves in the side direction by the air pressure in the cylindrical groove (210) and is combined in a manner that a pressure pad (330) arranged on one side surface contacts with the flange part (520) when moving in the side direction and transmits a pressure;
a flange housing (400) which is moved in a lateral direction toward the support frame (600) by the pressure pad (330) and has a plurality of first inclined surfaces (410) formed around the outer periphery thereof;
a chucking tool (500) which is formed with a second inclined surface (522) so as to be seated on the first inclined surface (410) of the flange housing (400), and which is provided with a plurality of flange members (520) which are brought into close contact with the inner peripheral surface of the core (10) on the outside when the flange housing (400) is moved, and which perform a chucking operation;
a restoring spring (710) disposed between the flange case (400) and the support frame (600) for supporting a restoring action of the flange case (400) after completing a chucking action of the flange part (520) and stopping the supply of the air pressure through the air hole (205);
a coupling spring (720) for restoring the plurality of flange parts (520) to original positions after finishing the chucking action of the respective flange parts (520); and the number of the first and second groups,
a support frame (600) closely fixed to the flange housing (400) and supporting the respective flange members (520) in a lateral direction.
The shaft body (100) comprising: and a groove part (120) which is formed by being recessed along the length direction at the outer circumference, and is provided with a plurality of communication holes (125) communicated with a supply flow path (110) formed inside, so that air pressure with uniform pressure is supplied from the supply flow path (110) to the inner side of each cylindrical groove part (210) of each pressurizing housing (200).
4. The friction shaft structure according to any one of claim 1 to claim 3, characterized in that:
the inclination angle of the first inclined surface (410) relative to the horizontal line is 30-45 degrees.
5. The friction shaft structure according to any one of claim 1 to claim 3, further comprising:
and an airtight ring member (810) coupled to the outer periphery of the shaft body (100), disposed inside the flange housing (400) and the support frame (600), respectively, and having O-rings (820) coupled to one side and the other side, respectively.
6. The friction shaft structure according to any one of claim 1 to claim 3, characterized in that:
the fixing frame (150) is fixed by means of a fixing block (130) coupled to one end and the other end of the shaft main body (100) to prevent the detachment.
7. The friction shaft structure according to any one of claim 1 to claim 3, characterized in that:
a plurality of ball rollers (610) for supporting the rotation of the core (10) are arranged at a predetermined interval around the outer periphery of the support frame (600).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2020-0122650 | 2020-09-23 | ||
| KR1020200122650A KR102248117B1 (en) | 2020-09-23 | 2020-09-23 | Friction shaft structure |
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| Publication Number | Publication Date |
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| CN114251346A true CN114251346A (en) | 2022-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110761664.XA Pending CN114251346A (en) | 2020-09-23 | 2021-07-06 | Friction shaft structure |
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| KR (1) | KR102248117B1 (en) |
| CN (1) | CN114251346A (en) |
Families Citing this family (2)
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|---|---|---|---|---|
| KR102347947B1 (en) * | 2021-08-30 | 2022-01-07 | 주식회사 유진테크놀로지 | Friction shaft for slitting machine |
| EP4396469A1 (en) * | 2022-10-17 | 2024-07-10 | Reymak Makine Sanayi ve Ticaret Anonim Sirketi | Friction ring |
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| KR101949864B1 (en) * | 2017-11-23 | 2019-02-19 | (주) 율림에어샤프트 | Friction Shaft For Slitter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR200379171Y1 (en) * | 2005-01-07 | 2005-03-18 | (주) 은성포장기계 | A Friction Shaft For Slitter |
| KR101232728B1 (en) | 2011-09-06 | 2013-02-13 | (주)피엔티 | Friction shaft |
| KR102009447B1 (en) | 2018-03-20 | 2019-08-12 | (주) 율림에어샤프트 | Friction Shaft For Slitter |
| KR102154783B1 (en) * | 2020-05-26 | 2020-09-10 | 김윤기 | Friction shaft |
-
2020
- 2020-09-23 KR KR1020200122650A patent/KR102248117B1/en active IP Right Grant
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2021
- 2021-07-06 CN CN202110761664.XA patent/CN114251346A/en active Pending
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| US4693431A (en) * | 1985-12-31 | 1987-09-15 | Hiroshi Kataoka | Winding shaft for sheet rewinder |
| CN102745556A (en) * | 2012-07-31 | 2012-10-24 | 柳燕明 | Mechanical expansion shaft of air control C-shaped rings |
| CN104787624A (en) * | 2014-01-22 | 2015-07-22 | 株式会社东伸 | Winding shaft of sheets, winding method of sheets with a low tension, and air tight structure of piston used for such the winding method |
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| KR101949864B1 (en) * | 2017-11-23 | 2019-02-19 | (주) 율림에어샤프트 | Friction Shaft For Slitter |
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| KR102248117B1 (en) | 2021-05-04 |
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