Feeding device

Abstract

To provide a feeding device capable of cleaning a roll with a simple structure.SOLUTION: A feeding device 10A includes: a frame 12 having an opening 14a; a pair of rolls 21, 22 arranged in the frame 12; a cylindrical holding tool 31A arranged from the opening 14a toward the rolls 21, 22, being open at its tip, and arranged in a tapered manner such that its inner dimension gradually reduces toward the tip; a wiping tool 39A inserted into the holding tool 31A from the opening 14a and projecting from the opening at the tip of the holding tool 31A, the tip being abutted against the outer peripheries of the rolls 21, 22; and an insertion member 37A which is laid over the wiping tool 39A and fitted into the holding tool 31A from the opening 14a together with the wiping tool 39A. The insertion member 37A is arranged in a wedge shape such that its thickness gradually reduces from the opening 14a toward the opening at the tip of the holding tool 31A, and the wedge shape makes the insertion member 37A and the wiping-off tool 39A held by the holding tool 31A.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a feeding device for conveying a web.

Background Art

[0002] A roll leveler is used for removing the curl and internal strain of a strip-shaped metal plate unwound from a coil. In order to supply the strip-shaped metal plate to the roll leveler, a feeding device consisting of a pair of rolls is provided at the inlet or outlet of the roll leveler.

[0003] Foreign matter (for example, metal powder, etc.) may adhere to the surface of the strip-shaped metal plate. In this case, it will transfer and adhere to the outer peripheral surface of the roll of the feeding device. Also, foreign matter that has entered from the outside may adhere to the outer peripheral surface of the roll of the feeding device. When using a roll with foreign matter attached, the surface of the strip-shaped metal plate will be scratched and become defective products. Therefore, it is necessary to clean the roll.

[0004] Patent Document 1 discloses a roll cleaning tool in which non-woven fabrics are adhered to both sides of a stainless steel thin plate. The roll cleaning tool is fixed on the upstream side of the inlet of the roll leveler and is inserted between the upper roll and the lower roll for feeding from the fixed position. Therefore, when the upper roll and the lower roll rotate, the outer peripheral surfaces of the upper roll and the lower roll are wiped by the roll cleaning tool.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, in the technique described in Patent Document 1, the mechanism for fixing the roll cleaning tool has a complicated structure.

[0007] Therefore, the present invention has been made in view of the above circumstances, and an object thereof is to provide a feeding device capable of cleaning a roll with a simple structure.

Means for Solving the Problems

[0008] In order to solve the above problems, a frame having an insertion port, a pair of rolls provided in the frame for sandwiching and conveying a web, a tubular holder provided from the insertion port toward the roll, having an open tip, and being tapered such that the inner dimension gradually decreases from the insertion port toward the tip, a wiping tool inserted from the insertion port into the holder, protruding from the opening at the tip of the holder, and having a tip abutted against the roll, and an insertion member overlapped on the wiping tool and fitted together with the wiping tool from the insertion port into the holder are provided. The insertion member or the wiping tool is provided in a wedge shape such that the thickness gradually decreases from the insertion port toward the opening at the tip of the holder, and a feeding device is provided in which the insertion member and the wiping tool are held by the holder by the wedge shape.

[0009] According to the above, even with a simple structure in which the insertion member or the wiping tool is wedge-shaped and the insertion member and the wiping tool are fitted into a tapered holder, the tip of the wiping tool can be held in a state of abutting against the roll, and the roll can be cleaned.

[0010] In order to solve the above problems, a frame having an insertion port, a pair of rolls provided in the frame for sandwiching and conveying a web, a tubular holder provided from the insertion port toward the roll, having an open tip, and being tapered such that the inner dimension gradually decreases from the insertion port toward the tip, and a wiping tool fitted from the insertion port into the holder, protruding from the opening at the tip of the holder, and having a tip abutted against the roll are provided. The wiping tool is provided in a wedge shape such that the thickness gradually decreases from the insertion port toward the opening at the tip of the holder, and a feeding device is provided in which the wiping tool is held by the holder by the wedge shape.

[0011] According to the above, even with a simple structure in which a wedge-shaped wiper is fitted into a tapered holder, the tip of the wiper can be held in a state of being pressed against the roll, and the roll can be cleaned.

[0012] Preferably, the tip of the wiper projects from the opening at the tip of the holder toward the position between the pair of rolls and abuts against both of the pair of rolls.

[0013] According to the above, since the tip of the wiper projects toward the position between the pair of rolls and abuts against these rolls, foreign matter is not drawn into the space between the pair of rolls during cleaning. Therefore, the cleaning operation of the roll can be performed safely.

[0014] Preferably, the feeding device further includes a drive motor that intermittently rotates the roll.

[0015] According to the above, even if some foreign matter tries to enter between the pair of rolls, the foreign matter is not rapidly drawn into the space between the pair of rolls. Therefore, the cleaning operation of the roll can be performed safely.

[0016] Preferably, the feeding device further includes a drive motor that alternately and repeatedly rotates the roll in the forward and reverse directions.

[0017] According to the above, even if some foreign matter tries to enter between the pair of rolls, the foreign matter is not rapidly drawn into the space between the pair of rolls. That is, even if something is caught between the pair of rolls, when the rotational direction of the pair of rolls changes, the pair of rolls rotates in the direction in which the caught object is discharged from between the pair of rolls. Therefore, the cleaning operation of the roll can be performed safely. Also, since the roll alternately and repeatedly rotates in the forward and reverse directions, the outer peripheral surface of the roll is efficiently wiped by the cleaning member.

[0018] Preferably, the drive motor rotates the roll forward and backward alternately and repeatedly so that one of the forward rotation angle and the reverse rotation angle of the roll is larger than the other.

[0019] According to the above, since one of the forward rotation angle and the reverse rotation angle of the roll is larger than the other, the outer peripheral surface of the roll is displaced step by step in the circumferential direction in the forward or reverse direction little by little. Therefore, the entire outer peripheral surface of the roll can be cleaned.

Effect of the Invention

[0020] According to the present invention, with a simple structure in which both the wiper and the insertion member or the wiper is fitted into a tapered holder, the tip of the wiper can be held in contact with the roll to clean the roll.

Brief Description of the Drawings

[0021]

Figure 1

Figure 2

Figure 3

Figure 4

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Figure 9

Figure 10

Figure 11

Figure 12

Embodiments for Carrying Out the Invention

[0022] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, although various technically preferable limitations are imposed on the embodiments described below for carrying out the present invention, the scope of the present invention is not limited to the following embodiments and illustrated examples.

[0023] 〔First Embodiment〕 1. Configuration of Feeding Device FIG. 1 is a cross-sectional view of the feeding device 10. FIG. 2 is an enlarged view of a part of the figure. This feeding device 10 supplies the belt-like web 9 to a processing device such as a press working device or a leveler. The feeding device 10 may be of an in-feed type provided on the upstream side of the processing device, or may be of an out-feed type provided on the downstream side of the processing device. The web 9 is made of iron or an alloy having iron as a main component (that is, steel), or a non-ferrous metal such as aluminum or copper. Note that the web 9 may be made of resin.

[0024] The feeding device 10 conveys the web 9 from the rear to the front. Since the web 9 is conveyed from the rear to the front, the rear is the upstream direction and the front is the downstream direction. Conveying the web 9 forward is called forward feeding, and conveying the web 9 backward is called reverse feeding. Also, the front is sometimes referred to as the forward feeding direction, and the rear is sometimes referred to as the reverse feeding direction. The direction perpendicular to the plane of FIG. 1 is the width direction of the feeding device 10 and the web 9. The width direction is sometimes referred to as the left-right direction.

[0025] As shown in Fig. 1, the feeding device 10 includes a bed 11, a frame 12, support tables 18 and 19, a lower roll 21, an upper roll 22, a lifting body 23, an actuator 24, a drive motor 28, a control unit 29, a lower holder 31, an upper holder 32, a lower pressing member 33, a lower inserting member 37, an upper inserting member 38, a lower wiping tool 39 and an upper wiping tool 40.

[0026] The bed 11 is installed in a state of being placed on the installation surface.

[0027] The frame 12 is installed on the bed 11. The frame 12 is provided in a rectangular parallelepiped box shape. The frame 12 has a pair of side frames 13, a rear frame 14, a front frame 15 and an upper frame 16. The side frames 13 are provided in a state of standing on the left and right edges of the upper surface of the bed 11, facing each other in the left - right direction with a space therebetween. The rear frame 14 is provided in a state of standing on the rear edge of the upper surface of the bed 11. The front frame 15 is provided in a state of standing on the front edge of the upper surface of the bed 11. The rear frame 14 and the front frame 15 face each other in the front - rear direction with a space therebetween. The side frames 13, the rear frame 14 and the front frame 15 are assembled in a square - tube shape. The upper frame 16 is attached to the upper ends of the side frames 13, the rear frame 14 and the front frame 15. The upper frame 16 closes the region surrounded by the side frames 13, the rear frame 14 and the front frame 15 from above.

[0028] An opening 14a is formed in the rear surface of the frame 12, that is, the rear frame 14. An opening 15a is formed in the front surface of the frame 12, that is, the front frame 15. The opening 15a is located at a position opposite to the opening 14a. The opening 14a is an inlet through which the web 9 is carried in, and the opening 15a is an outlet through which the web 9 is carried out. The web 9 passes through the openings 14a and 15a.

[0029] The support table 18 is fixed to the lower edge of the opening 14a while being inserted into the opening 14a. The support table 18 is partially disposed within the frame 12 and partially projects rearward from the opening 14a. The support table 18 supports the web 9 from below it.

[0030] The support table 19 is fixed to the lower edge of the opening 15a while being inserted into the opening 15a. The support table 19 is partially disposed within the frame 12 and partially projects forward from the opening 15a. The support table 19 is spaced apart from the support table 18 in the forward direction. The support table 19 supports the web 9 from below it.

[0031] The lower roll 21 is attached to the frame 12 via bearings or the like such that its axis extends in the width direction within the frame 12. The lower roll 21 is provided to be rotatable about its axis. The lower roll 21 is disposed in the gap between the support table 18 and the support table 19. The upper part of the peripheral surface of the lower roll 21 protrudes upward from the gap between the support table 18 and the support table 19.

[0032] The upper roll 22 is provided to be vertically movable above the lower roll 21 such that its axis extends in the width direction within the frame 12. Specifically, the upper roll 22 is rotatably attached to the lifting body 23 via bearings or the like, and the lifting body 23 is attached to the frame 12 to be vertically movable via a guide or the like. When the upper roll 22 descends toward the lower roll 21, the web 9 is sandwiched between the upper roll 22 and the lower roll 21.

[0033] The lower roll 21 and the upper roll 22 are connected to the drive motor 28 via a transmission mechanism. The drive motor 28 rotationally drives the lower roll 21 and the upper roll 22, whereby the web 9 sandwiched between the lower roll 21 and the upper roll 22 is conveyed. The drive motor 28 is composed of, for example, a servo motor. The drive motor 28 is controlled by the control unit 29. The control unit 29 is composed of, for example, a servo device.

[0034] The lifting body 23 is connected to an actuator 24 that lifts and lowers the lifting body 23 and the upper roll 22. This actuator 24 is attached to the upper frame 16. The actuator 24 is, for example, an air cylinder, a hydraulic cylinder, or a solenoid. The actuator 24 advances a plunger or rod 24b downward from the main body 24a and retracts the plunger or rod 24b upward into the main body 24a. Further, the actuator 24 applies a pressing force to the lifting body 23 and the upper roll 22 that presses the lowered upper roll 22 against the lower roll 21.

[0035] Insertion openings 14b and 14c are formed in the rear surface of the frame 12, that is, the rear frame 14. The insertion opening 14b is located below the opening 14a and behind the lower roll 21. The insertion opening 14c is located above the opening 14a and behind the upper roll 22.

[0036] Subsequently, the lower holder 31, the lower insertion member 37, and the lower wiper 39 will be described. The lower holder 31 is formed in a square tube shape. The lower holder 31 is attached to the inner surface of the rear frame 14. The lower holder 31 is provided from the insertion opening 14b toward the lower roll 21, and the tip of the lower holder 31 opens behind the lower roll 21. The lower holder 31 is provided in a tapered shape such that the inner dimension in the vertical direction thereof gradually decreases from the insertion opening 14b toward the lower roll 21.

[0037] In a state where the lower insertion member 37 is stacked on the lower wiper 39, the lower insertion member 37 and the lower wiper 39 are fitted into the lower holder 31 from the insertion port 14b. Here, the lower wiper 39 is provided in a flat plate shape, and the lower insertion member 37 is provided in a tapered (wedge-shaped) manner such that its thickness gradually decreases toward the tip. Therefore, the stacked body of the lower wiper 39 and the lower insertion member 37 is also provided in a tapered shape. By fitting such a tapered stacked body into the tapered lower holder 31, the lower insertion member 37 and the lower wiper 39 are held by the lower holder 31 so as not to come out of the lower holder 31. As the lower insertion member 37 is pushed into the lower holder 31 toward the lower roll 21, the lower insertion member 37 and the lower wiper 39 are more strongly held by the lower holder 31. Further, the taper angle of the lower insertion member 37 is set so as to generate a frictional force sufficient to prevent the lower insertion member 37 and the lower wiper 39 from coming out. Also, if the lower insertion member 37 is elastically deformable such as resin, etc., when the lower insertion member 37 and the lower wiper 39 are fitted into the lower holder 31, the lower insertion member 37 is elastically deformed, so that the lower insertion member 37 and the lower wiper 39 are difficult to come out. Note that the lower insertion member 37 may be provided in a flat plate shape, and the lower wiper 39 may be provided in a tapered shape such that the thickness of the lower wiper 39 gradually decreases toward the tip.

[0038] The tip of the lower wiper 39 protrudes from the opening at the tip of the lower holder 31 and abuts against the outer peripheral surface of the lower roll 21. At least the tip of the lower wiper 39 is made of a material that can wipe the outer peripheral surface of the lower roll 21, such as cloth or the like. Such materials are, for example, cloth, paper, brush, foamed resin, adhesive tape or composite sheet. The cloth may be any of woven cloth, knitted cloth and non-woven cloth (e.g., felt), and the fibers used for the cloth may be any of natural fibers and chemical fibers (artificial fibers). The chemical fibers are inorganic fibers (e.g., carbon fibers) or organic fibers (e.g., polyester-based synthetic fibers, polyamide-based synthetic fibers). The adhesive tape may be either a single-sided adhesive tape or a double-sided adhesive tape. The composite sheet refers to a thin strip-shaped flexible material (e.g., steel plate, stainless steel plate) with cloth or an adhesive adhered to both sides or one side thereof. The above-mentioned materials may be impregnated or coated with a lubricating fluid or a cleaning fluid such as oil.

[0039] Subsequently, an example of the lower wiper 39 will be described. The lower wiper 39 has a flat lower pressing member 33 and a sheet-shaped lower cleaning member 35. The lower cleaning member 35 covers the lower pressing member 33 so as to be folded back by the tip of the lower pressing member 33. The lower insertion member 37 and the lower pressing member 33 are stacked with the lower cleaning member 35 sandwiched therebetween. The lower insertion member 37, the lower pressing member 33 and the lower cleaning member 35 are fitted into the lower holder 31 through the insertion port 14b, and the lower cleaning member 35 is sandwiched between the lower pressing member 33 and the inner surface of the lower holder 31. The tip of the lower pressing member 33 protrudes from the opening at the tip of the lower holder 31, and the lower cleaning member 35 is pressed against the outer peripheral surface of the lower roll 21 by the tip of the lower pressing member 33. The lower pressing member 33 is, for example, a resin plate or a foamed resin plate. The lower cleaning member 35 is a material that can wipe the outer peripheral surface of the lower roll 21, such as cloth, paper, foamed resin sheet, adhesive tape or composite sheet.

[0040] Subsequently, the upper holder 32, the upper insertion member 38 and the upper wiper 40 will be described. The upper holder 32 is formed in a square tube shape. The upper holder 32 is attached to the inner surface of the rear frame 14. The upper holder 32 is provided from the insertion port 14c toward the upper roll 22, and the tip of the upper holder 32 opens behind near the upper roll 22. The upper holder 32 is provided in a tapered shape such that the inner dimension in the vertical direction gradually decreases from the insertion port 14b toward the upper roll 22.

[0041] In a state where the upper insertion member 38 is stacked on the upper wiper 40, the upper insertion member 38 and the upper wiper 40 are fitted into the lower holder 31 from the insertion port 14c. Here, the upper wiper 40 is provided in a flat plate shape, and the upper insertion member 38 is provided in a tapered shape such that its thickness gradually decreases toward the tip. Therefore, the stacked body of the upper wiper 40 and the upper insertion member 38 is also provided in a tapered shape. By fitting such a tapered stacked body into the tapered upper holder 32, the upper insertion member 38 and the upper wiper 40 are held by the upper holder 32 so as not to come out of the upper holder 31. As the upper insertion member 38 is pushed into the upper holder 32 toward the upper roll 22, the upper insertion member 38 and the upper wiper 40 are strongly held by the upper holder 32. Further, the taper angle of the upper insertion member 38 is set to generate a frictional force such that the upper insertion member 38 and the upper wiper 40 do not come out. Also, if the upper insertion member 38 is elastically deformable such as resin, the upper insertion member 38 and the upper wiper 40 are fitted into the upper holder 32, so the upper insertion member 38 is elastically deformed, and the upper insertion member 38 and the upper wiper 40 are difficult to come out. Note that the upper insertion member 38 may be provided in a flat plate shape, and the upper wiper 40 may be provided in a tapered shape such that the thickness of the upper wiper 40 gradually decreases toward the tip.

[0042] The tip of the upper wiper 40 protrudes from the opening at the tip of the upper holder 32 and abuts against the outer peripheral surface of the upper roll 22. At least the tip of the upper wiper 40 is made of a material that can wipe the outer peripheral surface of the upper roll 22, similar to the tip of the lower wiper 39. At least the tip of the upper wiper 40 may be impregnated or coated with a lubricating fluid or a cleaning fluid such as oil.

[0043] Next, an example of the upper wiping tool 40 will be described. Similar to the lower wiping tool 39, the upper wiping tool 40 has a flat upper pressing member 34 and a sheet-like upper cleaning member 36. The upper pressing member 34 of the upper wiping tool 40 corresponds to the lower pressing member 33 of the lower wiping tool 39, and the upper cleaning member 36 of the upper wiping tool 40 corresponds to the lower cleaning member 35 of the lower wiping tool 39. The upper insertion member 38, the upper pressing member 34, and the upper cleaning member 36 are fitted into the upper holder 32 through the insertion port 14c, the tip of the upper pressing member 34 protrudes from the opening at the tip of the upper holder 32, and the upper cleaning member 36 is pressed against the outer peripheral surface of the upper roll 22 by the tip of the upper pressing member 34.

[0044] 2. Conveying Operation of the Feeding Device Next, the usage method and conveying operation of the feeding device 10 will be described. First, when the actuator 24 is operated, the actuator 24 raises the lifting body 23 and the upper roll 22, and the upper roll 22 moves away from the lower roll 21.

[0045] Next, the web 9 is pulled out from the coil, and the tip of the web 9 is inserted into the frame 12 through the opening 14a. Then, the tip of the web 9 is passed between the lower roll 21 and the upper roll 22, and further passed through the opening 15a.

[0046] Next, when the actuator 24 is operated, the actuator 24 lowers the lifting body 23 and the upper roll 22, and the web 9 is sandwiched between the lower roll 21 and the upper roll 22.

[0047] Also, the lower cleaning member 35 wraps the lower pressing member 33. Then, the lower pressing member 33, the lower cleaning member 35, and the lower insertion member 37 are fitted into the lower holder 31 through the insertion port 14b. At this time, the lower pressing member 33, the lower cleaning member 35, and the lower insertion member 37 may be simultaneously fitted into the lower holder 31, or the lower insertion member 37 may be inserted into the lower holder 31 after the insertion of the lower pressing member 33 and the lower cleaning member 35, or the lower pressing member 33 and the lower cleaning member 35 may be inserted into the lower holder 31 after the insertion of the lower insertion member 37.

[0048] When fitting the lower abutting member 33, the lower cleaning member 35, and the lower insertion member 37, the tip of the lower abutting member 33 is protruded from the opening at the tip of the lower holder 31, and the lower cleaning member 35 is pressed against the lower roll 21 by the tip of the lower abutting member 33. Further, by pushing the lower insertion member 37 into the lower holder 31, the lower insertion member 37 and the lower abutting member 33 are fixed to the lower holder 31.

[0049] Similarly, the upper abutting member 34, the upper cleaning member 36, and the upper insertion member 38 are fitted into the upper holder 32 from the insertion port 14c. Thereby, the upper cleaning member 36 is pressed against the upper roll 22 by the tip of the upper abutting member 34, and the upper insertion member 38 and the upper abutting member 34 are fixed to the upper holder 32 by pushing the upper insertion member 38 into the upper holder 32.

[0050] After that, the control unit 29 controls the drive motor 28, and the drive motor 28 continuously or intermittently rotationally drives the lower roll 21 and the upper roll 22. Then, the web 9 is conveyed by the lower roll 21 and the upper roll 22. Further, the outer peripheral surface of the lower roll 21 slides against the lower cleaning member 35, and foreign matter adhering to the outer peripheral surface of the lower roll 21 is wiped off by the lower cleaning member 35. Similarly, foreign matter adhering to the outer peripheral surface of the upper roll 22 is wiped off by the upper cleaning member 36.

[0051] As described above, while conveying the web 9, the lower roll 21 and the upper roll 22 can be cleaned.

[0052] When the lower cleaning member 35 is worn, the lower abutting member 33 and the lower insertion member 37 are pulled to loosen the fitting of the lower abutting member 33 and the lower insertion member 37 to the lower holder 31. Then, the position of the lower cleaning member 35 is changed so as to slide the lower cleaning member 35 with respect to the lower abutting member 33. After that, the lower abutting member 33, the lower cleaning member 35, and the lower insertion member 37 are fitted into the lower holder 31. Thereby, the unworn portion of the lower cleaning member 35 is pressed against the lower roll 21. The same applies when the upper cleaning member 36 is worn. Note that the lower cleaning member 35 or the upper cleaning member 36 may be replaced with a new cleaning member.

[0053] 3. Cleaning Operation of the Feeding Device When the web 9 is not being conveyed, the cleaning operation of the feeding device 10 will be described. When the web 9 is not being conveyed, it means, for example, when the web 9 is being replaced, or when the rolls 21 and 22 are separated from each other.

[0054] First, the lower pressing member 33, the lower cleaning member 35, and the lower insertion member 37 are fitted into the lower holder 31 from the insertion port 14b. The lower cleaning member 35 is pressed against the lower roll 21 by the tip of the lower pressing member 33, and the upper insertion member 38 and the upper pressing member 34 are fixed to the upper holder 32 by pushing in the lower insertion member 37. Similarly, the upper pressing member 34, the upper cleaning member 36, and the upper insertion member 38 are fitted into the upper holder 32 from the insertion port 14c.

[0055] Thereafter, the control unit 29 controls the drive motor 28, and the drive motor 28 continuously or intermittently rotates the lower roll 21 and the upper roll 22. The rotation speed of the lower roll 21 and the upper roll 22 is preferably lower than the rotation speed of the lower roll 21 and the upper roll 22 when the web 9 is being conveyed. This is because even if some foreign matter tries to enter between the lower roll 21 and the upper roll 22, the foreign matter will not be rapidly drawn in between the lower roll 21 and the upper roll 22. Also, when the lower roll 21 and the upper roll 22 rotate intermittently, the foreign matter will not be rapidly drawn in between the lower roll 21 and the upper roll 22. Further, when the lower roll 21 and the upper roll 22 rotate intermittently, since the rotation speed of the lower roll 21 and the upper roll 22 changes, the cleaning efficiency by the lower cleaning member 35 or the upper cleaning member 36 is increased. Note that the rotation direction of the lower roll 21 and the upper roll 22 may be the forward feeding direction or the reverse feeding direction.

[0056] When the lower roll 21 rotates, the outer peripheral surface of the lower roll 21 slides against the lower cleaning member 35, and the foreign matter attached to the outer peripheral surface of the lower roll 21 is wiped off by the lower cleaning member 35. Similarly, the foreign matter attached to the outer peripheral surface of the upper roll 22 is wiped off by the upper cleaning member 36.

[0057] When the lower roll 21 and the upper roll 22 rotate intermittently, even if some foreign matter tries to enter between the lower roll 21 and the upper roll 22, the foreign matter will not be rapidly drawn in between the lower roll 21 and the upper roll 22. That is, even if something is caught between the lower roll 21 and the upper roll 22, it will come out due to the change in the rotation direction of the lower roll 21 and the upper roll 22. Therefore, the cleaning work of the lower roll 21 and the upper roll 22 can be performed safely.

[0058] In the above description, the control unit 29 drives the drive motor 28 continuously or intermittently, but the control unit 29 may control the drive motor 28 as follows.

[0059] The control unit 29 repeatedly rotates the drive motor 28 in the forward and reverse directions alternately at a short period. Then, the lower roll 21 and the upper roll 22 rotate repeatedly in the forward and reverse directions alternately. Here, if the web 9 is sandwiched between the lower roll 21 and the upper roll 22, the rotation directions of the drive motor 28, the lower roll 21, and the upper roll 22 in the direction in which the web 9 is conveyed in the forward feed direction are forward. On the other hand, the rotation directions of the drive motor 28, the lower roll 21, and the upper roll 22 in the direction in which the web 9 is conveyed in the reverse feed direction are reverse. Specifically, when the drive motor 28 rotates in the forward direction, the lower roll 21 rotates clockwise and the upper roll 22 rotates counterclockwise in the illustrated direction of FIG. 1. On the other hand, when the drive motor 28 rotates in the reverse direction, the lower roll 21 rotates counterclockwise and the upper roll 22 rotates counterclockwise in the illustrated direction of FIG. 1.

[0060] Since the outer peripheral surfaces of the lower roll 21 and the upper roll 22 rotate forward and reverse in the circumferential direction, the outer peripheral surfaces of the rolls 21, 22 are efficiently wiped by the cleaning members 35, 36.

[0061] At this time, the control unit 29 controls the rotation angle of the forward drive motor 28 to be larger than the rotation angle of the reverse drive motor 28. Since the forward rotation angles of the lower roll 21 and the upper roll 22 are larger than the reverse rotation angles, the outer peripheral surfaces of the lower roll 21 and the upper roll 22 are displaced step by step little by little in the forward direction while rotating forward and backward in the circumferential direction. Therefore, the entire outer peripheral surfaces of the lower roll 21 and the upper roll 22 can be cleaned.

[0062] When the lower roll 21 and the upper roll 22 alternately rotate forward and backward repeatedly, even if some foreign matter tries to enter between the lower roll 21 and the upper roll 22, the foreign matter will not be rapidly drawn in between the lower roll 21 and the upper roll 22. Therefore, the cleaning work of the lower roll 21 and the upper roll 22 can be performed safely.

[0063] Note that the control unit 29 may control the rotation angle of the reverse drive motor 28 to be larger than the rotation angle of the forward drive motor 28. In this case, the outer peripheral surfaces of the lower roll 21 and the upper roll 22 are displaced step by step little by little in the reverse direction while rotating forward and backward in the circumferential direction.

[0064] Note that when the control unit 29 drives the drive motor 28 intermittently, the drive motor 28 temporarily stops when the rotation direction of the drive motor 28 switches from the forward direction to the reverse direction. That is, the drive motor 28 operates to repeat forward rotation, temporary stop, reverse rotation, and temporary stop in sequence.

[0065] 4. Advantageous Effects According to the present embodiment, a simple structure is realized in which the flat lower wiping tool 39 and the wedge-shaped lower insertion member 37 are fitted into the tapered lower holder 31. Even with such a simple structure, the tip of the lower wiping tool 39 can be held in a state of being pressed against the outer peripheral surface of the lower roll 21, and the lower roll 21 can be cleaned. Similarly, with a simple structure in which the flat upper wiping tool 40 and the wedge-shaped upper insertion member 38 are fitted together with the upper cleaning member 36 into the tapered upper holder 32, the upper roll 22 can be cleaned.

[0066] Also, in this feeding device 10, the conveyance of the web 9 and the cleaning of the lower roll 21 and the upper roll 22 can be performed simultaneously.

[0067] Also, when the rolls 21 and 22 are driven intermittently, even if some foreign matter tries to enter between these rolls 21 and 22, the foreign matter will not be rapidly drawn into between the rolls 21 and 22. Therefore, the cleaning operation of the rolls 21 and 22 can be performed safely.

[0068] Also, when the rolls 21 and 22 rotate alternately in the forward and reverse directions repeatedly, even if some foreign matter tries to enter between the rolls 21 and 22, the foreign matter will not be rapidly drawn into between the rolls 21 and 22. Therefore, the cleaning operation of the rolls 21 and 22 can be performed safely.

[0069] 5. Modification As described above, the lower wiper 39 is a combination of the lower cleaning member 35 and the lower pressing member 33. On the other hand, as shown in FIG. 3, the lower wiper 39 may be composed of a single part. The lower wiper 39 shown in FIG. 3 is a flat foamed resin plate or a felt plate. The upper wiper 40 may also be composed of a single flat article made of foamed resin or felt.

[0070] 〔Second Embodiment〕 FIG. 4 is a cross-sectional view of the feeding device 10A of the second embodiment. FIG. 5 is an enlarged view of a part of FIG. 4. The components corresponding to each other between the feeding device 10A of the second embodiment and the feeding device 10 of the first embodiment are denoted by the same reference numerals.

[0071] Similar to the feeding device 10 of the first embodiment, the feeding device 10A of the second embodiment includes a bed 11, a frame 12, support tables 18 and 19, a lower roll 21, an upper roll 22, a lifting body 23, an actuator 24, a drive motor 28, and a control unit 29. Since these components of the feeding device 10A of the second embodiment are provided in the same manner as the components of the feeding device 10 of the first embodiment, the description of these components of the feeding device 10A of the second embodiment will be omitted. In the feeding device 10 of the first embodiment, the insertion ports 14b and 14c are formed in the rear surface of the frame 12, whereas in the feeding device 10A of the second embodiment, the insertion ports 14b and 14c are not formed.

[0072] The feeding device 10A of the second embodiment further includes a holder 31A, an insertion member 37A, and a wiping tool 39A.

[0073] The holder 31A is integrated with the support table 18 and has a square tubular shape. The holder 31A is provided from the opening 14a toward the region between the lower roll 21 and the upper roll 22. The tip of the holder 31A opens behind a position near the region between the lower roll 21 and the upper roll 22. The holder 31A is provided in a tapered shape such that the inner dimension in the vertical direction gradually decreases from the opening 14a toward the region between the lower roll 21 and the upper roll 22.

[0074] With the insertion member 37A being stacked on the wiper 39A, the insertion member 37A and the wiper 39A are fitted into the holder 31A from the opening 14a. Here, the wiper 39A is provided in a flat plate shape, and the insertion member 37A is provided in a tapered shape such that its thickness gradually decreases toward the tip. Therefore, the stacked body of the wiper 39A and the insertion member 37A is also provided in a tapered shape. By fitting such a tapered stacked body into the tapered holder 31A, the insertion member 37A and the wiper 39A are held by the holder 31A so as not to come out of the holder 31A. As the insertion member 37A is pushed into the holder 31A toward the lower roll 21 and the upper roll 22, the insertion member 37A and the wiper 39A are more strongly held by the holder 31A. Further, the taper angle of the insertion member 37A is set so as to generate a frictional force such that the insertion member 37A and the wiper 39A do not come out. Also, if the insertion member 37A is elastically deformable such as resin or the like, when the insertion member 37A and the wiper 39A are fitted into the holder 31A, the lower insertion member 37 is elastically deformed, so that the lower insertion member 37 and the lower wiper 39 are difficult to come out. Note that the insertion member 37A may be provided in a flat plate shape, and the wiper 39A may be provided in a tapered shape such that the thickness of the wiper 39A gradually decreases toward the tip.

[0075] The tip of the wiper 39A protrudes from the opening at the tip of the holder 31A toward the position between the lower roll 21 and the upper roll 22. The tip of the wiper 39A is abutted against the outer peripheral surfaces of the lower roll 21 and the upper roll 22. At least the tip of the wiper 39A is made of a material capable of wiping the outer peripheral surfaces of the lower roll 21 and the upper roll 22, similar to the tips of the lower wiper 39 and the upper wiper 40 in the first embodiment.

[0076] In the example shown in FIG. 5, the wiper 39A has a flat plate-shaped pressing member 33A and a sheet-shaped cleaning member 35A. The cleaning member 35A is covered by the pressing member 33A so as to be folded back by the tip of the pressing member 33A. The insertion member 37A and the pressing member 33A are stacked with the cleaning member 35A sandwiched therebetween. The insertion member 37A, the pressing member 33A, and the cleaning member 35A are fitted into the holder 31A from the opening 14a, and the cleaning member 35A is sandwiched between the pressing member 33A and the inner surface of the upper holder 32. The tip of the pressing member 33A protrudes from the opening at the tip of the holder 31A, and the cleaning member 35A is pressed against the outer peripheral surfaces of the lower roll 21 and the upper roll 22 by the tip of the pressing member 34A. The pressing member 34A is, for example, a resin plate or a foamed resin plate. The cleaning member 35A is, for example, cloth, paper, a foamed resin sheet, an adhesive tape, or a composite sheet.

[0077] This feeding device 10A cannot simultaneously convey the web 9 and clean the lower roll 21 and the upper roll 22. However, both rolls 21 and 22 can be cleaned by a set of pressing members 33A and wiping tools 39A. When cleaning the lower roll 21 and the upper roll 22, the pressing members 33A and the wiping tools 39A are fitted into the holder 31A from the opening 14a, the tip of the wiping tool 39A is abutted against the lower roll 21 and the upper roll 22, and the insertion member 37A is pushed into the holder 31A to fix the insertion member 37A and the wiping tool 39A to the holder 31A.

[0078] When cleaning the lower roll 21 and the upper roll 22, the control unit 29 rotates the drive motor 28 continuously or intermittently, or repeatedly rotates the drive motor 28 alternately in the forward and reverse directions in a short cycle. Then, the outer peripheral surfaces of the lower roll 21 and the upper roll 22 slide against the tip of the wiping tool 39A, and foreign matter adhering to the outer peripheral surfaces of the lower roll 21 and the upper roll 22 is wiped off by the tip of the wiping tool 39A.

[0079] In this embodiment, the opening 14a is blocked by the insertion member 37A and the wiper 39A, and the tip of the wiper 39A protrudes toward the position between the lower roll 21 and the upper roll 22 and is applied to the rolls 21 and 22. Therefore, foreign matter is not drawn between the lower roll 21 and the upper roll 22 during cleaning. Thus, the cleaning operation of the lower roll 21 and the upper roll 22 can be performed safely.

[0080] Note that, as in the example shown in FIG. 6, the wiper 39A may be composed of a flat single article made of foamed resin or felt.

[0081] 〔Third Embodiment〕 FIG. 7 is a cross-sectional view of the feeding device 10C of the third embodiment. FIG. 7 is an enlarged view of a part of FIG. 6. The same reference numerals are given to the corresponding components between the feeding device 10C of the third embodiment and the feeding device 10 of the first embodiment.

[0082] Similar to the feeding device 10 of the first embodiment, the feeding device 10C of the third embodiment includes a bed 11, a frame 12, support tables 18 and 19, a lower roll 21, an upper roll 22, a lifting body 23, an actuator 24, a drive motor 28, and a control unit 29. Since these components of the feeding device 10C of the third embodiment are provided in the same manner as the components of the feeding device 10 of the first embodiment, the description of these components of the feeding device 10C of the third embodiment is omitted.

[0083] In addition, while the feeding device 10 of the first embodiment includes a lower holder 31, an upper holder 32, a lower pressing member 33, an upper pressing member 34, a lower cleaning member 35, an upper cleaning member 36, a lower insertion member 37, and an upper insertion member 38, the feeding device 10C of the third embodiment includes a lower holder 31, an upper holder 32, a lower wiper 39, and an upper wiper 40, but does not include components corresponding to the insertion members 37 and 38. The lower holder 31 and the upper holder 32 of the feeding device 10C of the third embodiment are provided in the same manner as the lower holder 31 and the upper holder 32 of the feeding device 10C of the first embodiment, respectively.

[0084] In the feeding device 10C of the third embodiment, the lower wiper 39 and the upper wiper 40 are provided in a tapered shape such that the thickness gradually decreases toward the tip. The lower wiper 39 is fitted into the lower holder 31 through the insertion port 14b. Thereby, the lower wiper 39 is held by the lower holder 31. The tip of the lower wiper 39 protrudes from the opening at the tip of the lower holder 31 and abuts against the outer peripheral surface of the lower roll 21. The upper wiper 40 is fitted into the upper holder 32 through the insertion port 14c. Thereby, the upper wiper 40 is held by the upper holder 32. The tip of the upper wiper 40 protrudes from the opening at the tip of the upper holder 32 and abuts against the outer peripheral surface of the upper roll 22.

[0085] At least the tip of the lower wiper 39 is made of a material capable of wiping the outer peripheral surface of the lower roll 21. In the example shown in FIG. 8, the lower wiper 39 has a tapered lower pressing member 33 and a sheet-like lower cleaning member 35. The thickness of the lower pressing member 33 gradually decreases toward the tip. The lower cleaning member 35 covers the lower pressing member 33 so as to be folded back by the tip of the lower pressing member 33. The lower pressing member 33 and the lower cleaning member 35 are inserted into the lower holder 31 through the insertion port 14b, and the lower cleaning member 35 is pressed against the outer peripheral surface of the lower roll 21 by the tip of the lower pressing member 33.

[0086] At least the tip of the upper wiper 40 is made of a material capable of wiping the outer peripheral surface of the upper roll 22. In the example shown in FIG. 9, the upper wiper 40 has a tapered upper pressing member 34 and a sheet-like upper cleaning member 36. The thickness of the upper pressing member 34 gradually decreases toward the tip. The upper cleaning member 36 covers the upper pressing member 34 so as to be folded back by the tip of the upper pressing member 34. The upper pressing member 34 and the upper cleaning member 36 are inserted into the upper holder 32 through the insertion port 14c, and the upper cleaning member 36 is pressed against the outer peripheral surface of the upper roll 22 by the tip of the upper pressing member 34.

[0087] When cleaning the lower roll 21 and the upper roll 22, the control unit 29 rotates the drive motor 28 continuously or intermittently, or repeatedly rotates the drive motor 28 alternately in the forward and reverse directions at short intervals. Then, the outer peripheral surfaces of the lower roll 21 and the upper roll 22 slide against the tips of the wiping tools 39 and 40, and foreign matter adhering to the outer peripheral surfaces of the lower roll 21 and the upper roll 22 is wiped off by the wiping tools 39 and 40. Here, whether or not the web 9 is being conveyed, the lower roll 21 and the upper roll 22 can be cleaned.

[0088] Note that, as in the example shown in FIG. 9, the wiping tools 39 and 40 may each be a single wedge-shaped article made of foamed resin or felt.

[0089] 〔Fourth Embodiment〕 FIG. 10 is a cross-sectional view of the feeding device 10D of the fourth embodiment. FIG. 11 is an enlarged view of a part of FIG. 10. Components corresponding to each other between the feeding device 10C of the fourth embodiment and the feeding device 10A of the second embodiment are denoted by the same reference numerals.

[0090] Similar to the feeding device 10A of the second embodiment, the feeding device 10D of the fourth embodiment includes a bed 11, a frame 12, support tables 18 and 19, a lower roll 21, an upper roll 22, a lifting body 23, an actuator 24, a drive motor 28, and a control unit 29. Since these components of the feeding device 10D of the third embodiment are provided in the same manner as the components of the feeding device 10A of the second embodiment, descriptions of these components of the feeding device 10D of the fourth embodiment are omitted.

[0091] Also, while the feeding device 10A of the second embodiment includes a holder 31A, a pressing member 33A, and a wiping tool 39A, the feeding device 10D of the fourth embodiment includes a holder 31A and a wiping tool 39A, but does not include a component corresponding to the insertion member 37A. The holder 31A of the feeding device 10D of the fourth embodiment is provided in the same manner as the holder 31A of the feeding device 10A of the second embodiment.

[0092] In the feeding device 10D of the fourth embodiment, the wiper 39A is provided in a tapered shape such that its thickness gradually decreases toward the tip. The wiper 39A is fitted into the holder 31A from the opening 41a. Thereby, the wiper 39A is held by the holder 31A. The tip of the wiper 39A protrudes from the opening at the tip of the holder 31A, and the tip of the wiper 39A is pressed against the outer peripheral surfaces of the lower roll 21 and the upper roll 22.

[0093] At least the tip of the wiper 39A is made of a material that can wipe the outer peripheral surfaces of the lower roll 21 and the upper roll 22. In the example shown in FIG. 11, the wiper 39A has a tapered pressing member 33A and a sheet-like cleaning member 35A. The thickness of the pressing member 33A gradually decreases toward the tip. The cleaning member 35A covers the pressing member 33A so as to be folded back by the tip of the pressing member 33A. The pressing member 33A and the cleaning member 35A are fitted into the holder 31A from the opening 14a, and the cleaning member 35A is pressed against the outer peripheral surfaces of the lower roll 21 and the upper roll 22 by the tip of the lower pressing member 33A.

[0094] When cleaning the lower roll 21 and the upper roll 22, the control unit 29 rotates the drive motor 28 continuously or intermittently, or repeatedly rotates the drive motor 28 alternately in the forward and reverse directions in a short cycle. Then, the outer peripheral surfaces of the lower roll 21 and the upper roll 22 slide against the wiper 39A, and foreign matter adhering to the outer peripheral surfaces of the lower roll 21 and the upper roll 22 is wiped off by the wiper 39A.

[0095] Note that, as in the example shown in FIG. 12, the wiper 39A may be made of a wedge-shaped first article made of foamed resin or felt.

Explanation of Reference Numerals

[0096] 9…Web 10, 10A, 10C, 10D…Feeding device 12…Frame 14a…Opening 14b, 14c…Insertion port 21…Lower roll 22…Upper roll 31…Lower holder 32…Upper holder 33…Lower abutting member 34…Upper abutting member 35…Lower cleaning member 36…Upper cleaning member 31A…Holder 33A…Abutting member 35A…Cleaning member 39…Lower wiper 40…Upper wiper 39A…Wiper

Claims

1. A frame having an insertion port, A pair of rolls provided within the frame for sandwiching and conveying a web, A cylindrical holder provided from the insertion port toward the rolls, having an open tip and being tapered such that the inner dimension gradually decreases from the insertion port toward the tip, A wiper inserted from the insertion port into the holder, protruding from the open tip of the holder, and having a tip abutted against the rolls, An insertion member overlapped on the wiper and fitted together with the wiper from the insertion port into the holder, and A feeding device in which the insertion member or the wiper is provided in a wedge shape such that the thickness gradually decreases from the insertion port toward the open tip of the holder, and the insertion member and the wiper are held by the holder by the wedge shape.

2. A frame having an insertion port, A pair of rolls provided within the frame for sandwiching and conveying a web, A cylindrical holder provided from the insertion port toward the rolls, having an open tip and being tapered such that the inner dimension gradually decreases from the insertion port toward the tip, A wiper fitted from the insertion port into the holder, protruding from the open tip of the holder, and having a tip abutted against the rolls, and A feeding device in which the wiper is provided in a wedge shape such that the thickness gradually decreases from the insertion port toward the open tip of the holder, and the wiper is held by the holder by the wedge shape.

3. The tip of the wiper protrudes from the open tip of the holder toward a position between the pair of rolls and abuts against both of the pair of rolls The feeding device according to claim 1 or 2.

4. Further comprising a drive motor for intermittently rotating the rolls The feeding device according to any one of claims 1 to 3. Claim 5 further comprising a drive motor that alternately and repeatedly rotates the roll in the forward and reverse directions The feeding device according to any one of claims 1 to 3. Claim 6 The drive motor alternately and repeatedly rotates the roll in the forward and reverse directions such that one of the forward rotation angle and the reverse rotation angle of the roll is larger than the other The feeding device according to claim 5.

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