JP2004026348A - Suction roller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suction roller which can surely convey and guide a web such as extremely thin films or paper requiring delicate handling in the state sucked and held over the entire width direction, in which structure is simple and a group of suction blocks can be easily assembled to a roller body and whose manufacturing cost can be small as the whole. <P>SOLUTION: This suction roller is constituted by embedding and fixing the group of suction blocks 4 on the circumferential face of the roller body 3. The suction block 4 is made of a strip material formed by a ceramic porous body. On the circumferential face of the roller body 3, a group of loading grooves 13 are radially formed in the state opened on the roller side face. By loading the plurality of suction blocks 4 in the loading grooves 13 from the roller side face, the suction block is exposed over the entire width of the roller body 3. By disposing a joint block 5 on both right and left sides of the roller body 3, and vacuum pressure generated by an air supplying device 32 is made to act on the suction block 4 through an exhaust passage 14 so as to suck and convey the web W. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a suction roller for conveying and guiding a web that requires delicate handling, such as an extremely thin film or paper, in an adsorbed state. The suction roller is configured by embedding a group of ceramic suction blocks on the peripheral surface of the roller body.
[0002]
[Prior art]
A suction roller using a ceramic suction block as an adsorbing element is known, for example, from Japanese Patent No. 2709168. In this case, suction units are arranged at six locations on the peripheral surface of the roller body. The suction unit is formed by insert-fixing a previously sintered suction block to a unit frame formed by casting, and the porous portion of the suction block is exposed by cutting the inner and outer surfaces thereof. Incidentally, this suction roller is used for the purpose of preventing the cold strip conveyed in one direction from meandering during the production of the cold rolled steel sheet.
[0003]
[Problems to be solved by the invention]
The suction roller has only a suction unit disposed in the central portion of the full width of the roller body. Moreover, the suction units are arranged at regular intervals at six locations in the circumferential direction of the roller body. For this reason, when transporting and guiding a web such as an extremely thin film or paper, the web cannot be captured and held evenly in the width direction, and the suction force acts only on the central portion of the web. However, if the roller slightly deviates from the center in the width direction of the roller, there is a disadvantage that an uneven conveying force acts on the web, and the displacement of the web tends to increase gradually. When the wrapping angle of the web with respect to the roller is small, the web may slip.
[0004]
A suction block, which has been sintered in advance, is insert-fixed to a unit frame formed by casting to form a suction unit. After cutting the obtained suction unit, the suction unit is assembled to the roller body to perform suction. Since it is a roller, a lot of labor is required for its production, and the overall cost of the suction roller is high. Suction units are arranged at regular intervals, so when transporting and guiding webs that are prone to wrinkling such as ultra-thin films and paper, suction marks are likely to be generated at the locations where the suction units are attracted. It may not be usable. Since the web is transported while applying a vacuum pressure to all the suction units arranged on the peripheral surface of the roller body, it is inevitable that air is sucked in from the suction unit that is not involved in the suction of the web W, and the vacuum pressure is that much. However, there is a disadvantage that it is wasted.
[0005]
An object of the present invention is to provide a suction roller in which a group of suction blocks are embedded in the peripheral surface of a roller body, and a web such as an extremely thin film or paper can be conveyed and guided while being sucked and held in the entire width direction. Is to provide. An object of the present invention is to provide a suction roller that can suck and convey a web while applying a vacuum pressure only to a necessary portion of the peripheral surface of a roller body, and can improve the operation efficiency of a suction device by that amount. An object of the present invention is to provide a suction roller that can convey the web adsorbed on the roller body while forcibly separating it, and therefore can properly convey the web even when the web conveyance speed is high. An object of the present invention is to provide a suction roller that can simplify the roller structure, and can easily assemble a group of ceramic suction blocks to the roller body, thus reducing the overall cost compared to a conventional suction roller. Is to provide. It is an object of the present invention to provide a suction roller that can reliably convey and guide a web that requires delicate handling without generating a suction mark.
[0006]
[Means for Solving the Problems]
The suction roller according to the present invention includes a roller body 3, a group of suction blocks 4 made of a ceramic porous body embedded and fixed on the peripheral surface of the roller body 3, and joint blocks 5 arranged on the left and right sides of the roller body 3. Including. A group of loading grooves 13 that open at regular intervals in the circumferential direction on the circumferential surface of the roller is formed radially on the roller body 3 in a state of opening on the side surface of the roller. The suction block 4 is loaded into the loading groove 13 from the side surface of the roller and is exposed over the entire width of the roller body 3.
[0007]
Specifically, an exhaust passage 14 communicating with the suction block 4 is provided in the roller body 3. An exhaust manifold 27 communicating with the exhaust passage 14 is formed on the joint surface of the joint block 5 with the roller body 3. The exhaust manifold 27 communicates with the air supply device 32 via the intake passage 31. The formation range of the exhaust manifold 27 is set corresponding to the winding angle of the web W with respect to the roller body 3.
[0008]
An exhaust manifold 27 and an air supply manifold 28 communicating with the exhaust passage 14 are formed adjacent to each other on the joint surface of the joint block 5 with the roller body 3. The air supply manifold 28 is connected to a supply source of pressurized air through the discharge passage 34.
[0009]
A retaining portion 15 having a width wider than that of other portions is formed on the inner side of the peripheral surface opening of the loading groove 13. The suction block 4 is formed in a strip shape including a base portion 16 received by the previous retaining portion 15.
[0010]
An air-permeable sleeve 37 that prevents the occurrence of suction marks is externally attached to the peripheral surface of the roller body 3.
[0011]
A first journal portion 21 and a second journal portion 22 are provided adjacent to each other on both sides of the roller body 3. The roller body 3 is rotatably supported by supporting the first journal portion 21 with the bearing box 2 fixed to the roller support base 1. The pair of left and right joint blocks 5 are supported by the second journal portion 22 via a bearing 24 so as to be relatively rotatable, and are fixed to be non-rotatable by a rotation stopper 25 fixed to the roller support 1.
[0012]
A group of suction blocks 4 fitted and loaded in the loading groove 13 is held by a fixed disk 12 fixed to the left and right rollers. A group of passages 19 for communicating the exhaust passage 14 and the manifold portion 28 are provided on the surface of the fixed disk 12.
[0013]
[Effects of the invention]
In the present invention, the strip-shaped suction block 4 is loaded into the loading groove 13 formed on the peripheral surface of the roller body 3 from the side surface of the roller so that the suction block 4 is exposed over the entire width of the roller body 3. As shown in FIG. 4, even if the entire width of the web W can be reliably conveyed and guided in the state in which the entire width of the web W is sucked and held in the width direction by the suction block 4, The web W can be conveyed without problems. Since the web W is adsorbed by the group of suction blocks 4, even when the wrapping angle of the web W with respect to the roller body 3 is small, the conveyance guide can be surely performed. Since the suction block 4 is formed in the shape of a strip in advance and inserted into the loading groove 13 to form a suction roller, the roller structure can be simplified compared to this type of conventional roller. Moreover, the suction block 4 can be easily assembled to the roller body 3, and the production cost of the suction roller can be reduced accordingly. Since the loading groove 13 is formed so as to open on the side surface of the roller, it is advantageous in that the loading groove 13 can be easily processed.
[0014]
According to the suction roller in which the exhaust manifold 27 communicating with the exhaust passage 14 is formed in the joint block 5 and the formation range of the exhaust manifold 27 is set corresponding to the winding angle of the web W with respect to the roller body 3, the roller Since vacuum pressure is applied only to the web W wound around the main body 3 and air suction from the roller peripheral surface around which the web W is not wound can be suppressed, the waste of vacuum pressure is eliminated. Therefore, the operation efficiency of the adsorption device 6 can be improved by that much, which can contribute to energy saving. It is possible to well prevent dust in the air floating around the roller from being adsorbed on the roller peripheral surface and causing clogging. Note that the vacuum pressure in the present invention means an air pressure lower than the atmospheric pressure, and the negative pressure of the air to be applied varies depending on the characteristics of the web W to be conveyed and guided. There is no need.
[0015]
According to the suction roller in which the air supply manifold 28 is provided separately from the exhaust manifold 27 and the air supply manifold 28 is disposed adjacent to the exhaust manifold 27, by supplying pressurized air to the air supply manifold 28, Pressurized air is blown out from the suction block 4 that has adsorbed W to forcibly separate and peel the web W that has been in close contact with the peripheral surface of the roller body 3. Therefore, even when the feeding speed of the web W is high, the web W can be properly conveyed by being reliably attracted and separated from the roller body 3. Since the dust sucked and captured by the suction block 4 can be blown out of the roller by the pressurized air blown from the suction block 4, the suction block 4 can be prevented from being clogged well.
[0016]
If the retaining portion 15 is formed in the loading groove 13 and the base portion 16 of the suction block 4 is received by the previous retaining portion 15, the structure of the suction roller can be simplified as compared with the case where a separate retaining structure is provided. . Since the suction block 4 formed in the shape of a strip is mounted in the loading groove 13 to constitute a suction roller, the number of the suction blocks 4 used is adjusted, or the suction block 4 is cut to a required length, whereby a suction roll In addition, the suction rollers having different adsorption characteristics can be variously configured by simply changing the adjacent pitch of the loading grooves 13.
[0017]
According to the suction roller in which the air-permeable sleeve 37 is externally fitted to the peripheral surface of the roller body 3, the suction air is dispersed by the micro holes 38 formed in the sleeve 37, and the boundary of the suction portion is blurred. Therefore, even if the web W that is particularly easily tacked is conveyed and guided, it is possible to reliably prevent the suction mark from being generated on the web surface.
[0018]
After the roller body 3 is rotatably supported, the joint block 5 is supported by the second journal portion 22 through the bearing 24 so as to be relatively rotatable, and the joint block 5 is fixed by the rotation stopper 25 so as not to rotate. Then, the rotation operation of the roller body 3 is blocked by the bearing 24, and the position of the joint block 5 can be fixed at a predetermined phase position while avoiding the rotation of the joint block 5 with the roller body 3. The passage connection with the joint block 5 can be reliably performed. Moreover, the phase of the joint block 5 can be changed corresponding to the change of the winding position with respect to the roller main body 3 of the web W by adjusting the fixing position of the rotation stopper 25.
[0019]
Since the group of suction blocks 4 is retained by the fixed disks 12 fixed to the side surfaces of the left and right rollers, the structure of the suction roller can be simplified as compared with the case where the suction blocks 4 are individually retained and secured.
[0020]
【Example】
1 to 6 show an embodiment of a suction roller according to the present invention. 2 and 3, the suction roller includes a roller body 3 rotatably supported by a pair of left and right roller support bases 1 via a bearing box 2, and a group of suction blocks embedded in the peripheral surface of the roller body 3. 4, joint blocks 5 disposed on the left and right sides of the roller body 3, and a suction device 6 that applies a vacuum pressure to the suction block 4. In FIG. 3, reference numeral 7 denotes a guide roller, and the web W is coated on the upper side in the transport direction than the guide roller 7. The suction roller of the present invention is provided to convey the web W to be processed at a constant tension and a constant speed.
[0021]
In FIG. 2, the roller body 3 includes a horizontally long roller base 10 made of an aluminum alloy, a pair of left and right main shafts 11 made of steel and fixed to both side surfaces of the roller base 10, and the roller base 10. And a pair of left and right fixed disks 12 fixed on both sides. If the main shaft 11 is formed of a component different from the roller base 10 as described above, the waste of the material can be saved and the weight of the roller base 10 can be reduced. As shown in FIG. 1, the roller base 10 is formed with a group of loading grooves 13 that are open on the circumferential surface thereof, and a group of exhaust passages 14 is formed radially with the respective loading grooves 13. In this embodiment, the 36 loading grooves 13 and the exhaust passage 14 are equally arranged in the circumferential direction of the roller base 10. The loading groove 13 and the exhaust passage 14 are formed by cutting so as to open on both side surfaces of the roller base 10, respectively, and more precisely and with less labor than when drilling with a drill or the like. Can be processed. The loading groove 13 is formed in a convex shape in cross section, and a retaining portion 15 wider than the others is formed in a portion adjacent to the exhaust passage 14 (see FIG. 6).
[0022]
The suction block 4 is composed of a strip-like porous body formed by sintering a ceramic material and then grinding the outer surface to form a convex cross section. The suction block 4 is wider than the rest received by the retaining portion 15 at the bottom. The base 16 is provided. The average pore diameter of the suction block 4 is approximately several μm, the longitudinal dimension thereof is 300 mm, and the lateral width of the base portion 16 is 10 mm. The suction block 4 is inserted and loaded into the loading groove 13 from one side of the roller base 10 and is fixedly bonded to the roller base 10 with an adhesive applied in advance.
[0023]
As shown in FIG. 5, five suction blocks 4 having a standard length and one suction block 4 cut short are loaded in the loading groove 13, and the suction surface of the suction block 4 is a roller base 10. It is exposed over the entire range of left and right widths. After the suction block 4 is fitted in all the loading grooves 13, the suction block 4 can be prevented from coming off by fixing the fixing disks 12 with bolts 18 on both sides of the roller base 10 as shown in FIG. 4. In this state, the peripheral surface of the roller base 10 is polished to improve the surface accuracy of the roller base 10 and the suction block 4. In addition, on the surface of the fixed disk 12, through holes 19 are provided corresponding to the respective exhaust passages 14 for communicating the exhaust passage 14 and a manifold portion 28 of the joint block 5 described later.
[0024]
In FIG. 4, the main shaft 11 is provided with a first journal portion 21 and a second journal portion 22 in a multi-stage shaft shape, and the first journal portion 21 is pivotally supported by a bearing box 2 via a bearing 23. The entire roller body 3 is pivotally supported. The roller body 3 is driven to rotate in synchronization with the conveyance speed of the web W by a drive mechanism (not shown). For this purpose, the left main shaft 11 protrudes outward from the bearing box 2 toward FIG. 2, and a transmission mechanism such as a gear or a sprocket can be fixed to the protruding portion. The joint block 5 is supported by a pair of left and right bearings 24 fitted on the second journal portion 22 so as to be relatively rotatable. In order to prevent the joint block 5 from rotating around the roller body 10, one end of the rotation stopper 25 is fixed to the roller support 1 and the other end is fixed to the joint block 5 with a bolt 26. Thus, by fixing the joint block 5 with the rotation stop tool 25, the joint block 5 is always held at a fixed phase position.
[0025]
Exhaust manifolds 27 communicating with the plurality of exhaust passages 14 through the openings 19 and air supply manifolds 28 are recessed in the side surface adjacent to the fixed disk 12 of the joint block 5 so as to be adjacent to each other in the circumferential direction. . The air supply manifold 28 is arranged on the lower side of the rotation, that is, on the lower side of the web W in the conveyance direction, with the exhaust manifold 27 as a reference. As shown in FIG. 1, both manifolds 27 and 28 are each formed of a concave portion having a circular arc shape, and the pipe joints 29 and 30 are fixed to the peripheral surface of the joint block 5 in a state of communicating with the manifolds 27 and 28. . In order to suck and convey the web W wound around the roller body 3 by the suction block 4, and to forcibly separate the sucked web W from the peripheral surface of the roller body 3, a pair of pipe joints 29 and 30 are provided. A suction device 6 is provided between the two.
[0026]
In FIG. 1, the suction device 6 is connected to an intake passage 31 connected to one pipe joint 29, an air supply device (turbo blower) 32, a motor 33 that rotationally drives the air supply device 32, and the other pipe joint 30. The discharge passage 34 is formed. The intake passage 31 is connected to the suction port 32 a of the air supply device 32, and the discharge passage 34 is connected to the discharge port 32 b of the air supply device 32 via the filter 35. Thus, if vacuum pressure and pressurized air are simultaneously supplied with one air supply device 32, the structure of the suction device 6 can be simplified and energy consumption by the suction device 6 can be reduced.
[0027]
In order to reliably adsorb the web W wound around the roller body 3 and to further minimize the adsorption loss, the formation range of the exhaust manifold 27 corresponds to the winding angle of the web W with respect to the roller body 3. Set. The formation range of the exhaust manifold 27 is preferably substantially coincident with the winding angle of the web W with respect to the roller body 3, but at least as long as the front and rear range near the center of the winding angle of the web W can be adsorbed. It ’s enough. In this embodiment, as shown in FIG. 1, when each suction block 4 is positioned within the web W winding angle (36 degrees) range, the exhaust passage 14 communicates with the exhaust manifold 27 via the through hole 19. In this way, the vacuum pressure is applied to the suction block 4 only in the winding angle range of the web W, and the suction of air from the suction block 4 on the roller peripheral surface that is not involved in the suction of the web W can be prevented.
[0028]
Air that has been pressurized by the air supply device 32 is supplied to the air supply manifold 28. Therefore, when the exhaust passage 14 communicates with the air supply manifold 28 with the rotation of the roller body 3, the pressurized air is blown from the suction block 4 that has previously adsorbed the web W, and is in close contact with the peripheral surface of the roller body 3. The web W which has been forcibly separated and peeled off. Therefore, even when the feeding speed of the web W is large, the web W can be appropriately conveyed by reliably performing the suction and separation. There is also an advantage that dust or the like sucked and captured by the suction block 4 can be cleaned by blowing pressurized air from the suction block 4.
[0029]
Depending on the type of the web W, a suction mark may be generated at a portion sucked by the suction block 4. In order to prevent the occurrence of such adsorption marks, a breathable membrane sleeve 37 is externally attached to the peripheral surface of the roller body 3 as shown in FIG. The film-like sleeve 37 is made of a metal cylindrical body in which minute holes 38 are uniformly formed on the entire cylindrical wall, and is formed by electroforming, for example, like an outer blade of an electric razor. By adding the film-like sleeve 37, the negative pressure air acting on the web W can be dispersed in the group of minute holes 38, so that it is possible to well prevent the formation of suction marks. If necessary, the film-like sleeve 37 can be formed of a rubber cylindrical body in which minute holes 38 are uniformly formed in the entire cylindrical wall.
[0030]
In the above embodiment, the suction roller and the suction device 6 are connected in an endless manner to form a closed loop. Thus, the web W can be sucked and conveyed. The cross-sectional shape of the suction block 4 can be changed to a trapezoidal shape, an L shape, or the like, and the length thereof can be set to an arbitrary length within a range of several centimeters to several tens of centimeters. The exhaust passage 14 does not need to be provided for each suction block 4, and can be constituted by a plurality of collecting holes divided in the circumferential direction and holes that are formed radially from the loading groove 13 toward the collecting hole. .
[0031]
The fixed disk 12 can be formed in a ring shape that covers only the side surface of the suction block 4, and in this case, the opening 19 can be omitted. As the air supply device 32, a reciprocating or rotary vacuum pump can be applied, and when it is not necessary to apply a large negative pressure, a fan type exhaust device can be applied. In that case, pressurized air is supplied to the air supply manifold 28 by a separately provided pressurized air supply source.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view taken along line BB in FIG.
FIG. 2 is a front view of a suction roller.
FIG. 3 is a side view of the suction roller.
4 is a cross-sectional view taken along line AA in FIG.
FIG. 5 is a plan view showing an arrangement form of suction blocks.
FIG. 6 is a cross-sectional view showing a detailed structure of a suction block.
[Explanation of symbols]
2 Bearing box 3 Roller body 4 Suction block 5 Joint block 12 Fixed disk 13 Loading groove 14 Exhaust passage 15 Detachment portion 16 Base portion 19 Opening port 21 First journal portion 22 Second journal portion 24 Bearing 25 Stopper 28 Manifold portion 31 Intake Passage 32 Exhaust device 34 Discharge passage 37 Sleeve

Claims (7)

Including a roller body 3, a group of suction blocks 4 made of a ceramic porous body embedded and fixed on the peripheral surface of the roller body 3, and joint blocks 5 disposed on the left and right sides of the roller body 3,
The roller body 3 is formed radially with a group of loading grooves 13 that open at regular intervals in the circumferential direction on the roller peripheral surface, with the roller side surface opening.
The suction block 4 is loaded into the loading groove 13 from the side surface of the roller, and is exposed over the entire width of the roller body 3. An exhaust passage 14 communicating with the suction block 4 is provided inside the roller body 3.
An exhaust manifold 27 communicating with the exhaust passage 14 is formed on the joint surface of the joint block 5 with the roller body 3.
The exhaust manifold 27 is communicated with an air supply device 32 via an intake passage 31.
The suction roller according to claim 1, wherein a range in which the exhaust manifold is formed is set corresponding to a winding angle of the web W with respect to the roller body 3. An exhaust manifold 27 communicating with the exhaust passage 14 and an air supply manifold 28 are formed adjacent to the joint surface of the joint block 5 with the roller body 3,
The suction roller according to claim 1, wherein the air supply manifold is connected to a supply source of pressurized air through a discharge passage. A retaining portion 15 wider than other portions is formed on the inner side of the peripheral opening of the loading groove 13,
The suction roller according to claim 1, wherein the suction block (4) includes a base portion (16) received by the previous retaining portion (15). The suction roller according to claim 1, wherein an air-permeable sleeve 37 for preventing the occurrence of suction marks is fitted on the peripheral surface of the roller body 3. A first journal portion 21 and a second journal portion 22 are provided adjacent to each other on both sides of the roller body 3,
The first journal portion 21 is supported by a bearing box 2 fixed to the roller support base 1, and the roller body 3 is pivotally supported rotatably.
2. The suction according to claim 1, wherein the pair of left and right joint blocks are supported by a second journal portion so as to be rotatable relative to each other via a bearing, and are fixed to be non-rotatable by a locking tool fixed to the roller support base. roller. A group of suction blocks 4 fitted and loaded in the loading groove 13 is held by fixed disks 12 fixed to the left and right roller sides,
The suction roller according to claim 1, wherein a group of through holes 19 for communicating the exhaust passage 14 and the manifold portion 28 are provided on the surface of the fixed disk 12.

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