Cotter device and roll device using the same

Abstract

To provide a cotter device in which a gap between a first base and a second base does not change after the gap is adjusted by a male screw portion, and a roll device using the same.SOLUTION: There is provided a cotter device, comprising: a first pedestal 110 having a flat surface; a second pedestal 112 having an inclined surface; a wedge-shaped core block 114 disposed between the first pedestal 110 and the second pedestal 112; an injection space 128 provided inside the core block 114; a female thread portion 120 extending in a longitudinal direction of the wedge-shaped core block 114 and penetrating the injection space 128; a male screw portion 132 that penetrates the female screw portion 120; and a cotter pump 140 that injects compressed air into the injection space 128.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The present invention relates to a cotter device and a roll device using the same. [Background technology]

[0002] In the field of machinery, a cotter device is used to adjust the distance between a first member and a second member. This cotter device has a first base with a flat surface on the first member, a second base with an inclined surface inclined relative to the flat surface on the second member, and a wedge-shaped core block disposed between the first and second bases. A female thread penetrates the core block, and a male thread is threadedly engaged with the female thread. The core block can be moved by rotating the male thread using an operator or a motor, thereby widening or narrowing the gap between the first and second members by the inclination angle of the inclined surface. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-70854 [Patent Document 2] Japanese Patent Publication No. 2020-28841 Summary of the Invention [Problem to be solved by the invention]

[0004] However, there was a problem in that even after adjusting the gap between the first and second members while a force was being applied to either the first or second member, the gap would deviate by several microns. This was because, due to manufacturing tolerances between the female and male threads of the core block, there was a slight gap between the crests and valleys of the male thread and the valleys and crests of the female thread, and the core block moved by the amount of this gap, changing the gap.

[0005] In view of the above problems, the present invention aims to provide a cotter device and a roll device using the same in which the gap between the first base and the second base does not change after the gap is adjusted with the male thread portion. [Means for solving the problem]

[0006] An embodiment of the present invention includes a first base having a flat surface, a second base having an inclined surface facing the flat surface and inclined relative to the flat surface, a wedge-shaped core block disposed between the flat surface of the first base and the inclined surface of the second base, an injection space provided inside the core block, a block female screw portion extending in the longitudinal direction of the wedge-shaped core block and penetrating the injection space, a male screw portion penetrating the block female screw portion, and an injection means for injecting compressed air into the injection space. a recess is formed on the outer surface of the core block from which the male screw portion protrudes, the recess communicates with the injection space, a nut is fitted into the recess, and the nut female screw portion and the block female screw portion are coaxial and have the same diameter; This is a cotter device characterized by the above. [Effects of the Invention]

[0007] According to this embodiment, after adjusting the gap between the first and second seats with the male thread, compressed air is injected into the injection space from the injection means, and the compressed air presses the crests and valleys of the male thread against the crests and valleys of the female thread, fixing them in place. Therefore, the gap between the first and second seats does not change. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a perspective view of the heating roll device of the present embodiment. [Figure 2] FIG. [Figure 3] FIG. 2 is a block diagram of a heating roll device. [Figure 4] FIG. 2 is a longitudinal cross-sectional view of the heating roll device as seen from the rear. [Figure 5] FIG. 2 is a right side view of the heating roll device. [Figure 6] FIG. 2 is a left side view of the upper heating roll. [Figure 7] FIG. 2 is a right side view of the upper heating roll. [Figure 8]FIG. 2 is a partial development view of the right side of the upper roll body of the upper heating roll. [Figure 9] FIG. 2 is a diagram illustrating a main flow path, a heating flow path, a connecting flow path, and a direct-connecting flow path in the upper heating roll. [Figure 10] FIG. [Figure 11] FIG. 10 is a longitudinal cross-sectional view of the right cotter device as seen from the rear. [Figure 12] FIG. 4 is a vertical cross-sectional view of the right pressing device. [Figure 13] FIG. 10 is a cross-sectional view of the lower right bearing portion as viewed from above. [Figure 14] FIG. 4 is a rear view of the pressing device as seen from the inlet side. [Figure 15] FIG. 10 is a vertical cross-sectional view of an upper heating roll according to a second modified example. [Figure 16] FIG. 10 is an explanatory diagram of a powder pressing device according to a third modified example. DETAILED DESCRIPTION OF THE INVENTION

[0009] A heating roll device 10 according to one embodiment of the present invention will be described below with reference to Figs. 1 to 14. The heating roll device 10 of this embodiment presses a long web W between two heating rolls, and the web W may be a film, a film coated with a coating liquid, or a metal foil. In this description, the web W flows in the front-to-rear direction from the entrance to the exit of the heating roll device 10 as shown in Fig. 1, with the entrance side defined as the rear and the exit side defined as the front. Furthermore, left-to-right directions are defined as the left-to-right directions when viewed from the rear to the front.

[0010] (1) Heating Roll Device 10 The overall outline of a heating roll device 10 of the present invention will be described with reference to FIGS.

[0011] 1 and 2, a pair of rectangular parallelepiped left and right support frames, a front-left support frame 14 and a front-right support frame 12, are erected vertically in the front part of the upper surface of a base 11 placed on a horizontal floor, and a pair of rectangular parallelepiped left and right support frames, a rear-left support frame 15 and a rear-right support frame 13, are erected vertically in the rear part of the upper surface of the base 11. Furthermore, as shown in Fig. 2, an apparatus support frame 16 is erected vertically from the base 11 to the left of the front-left support frame 14 and the rear-left support frame 15.

[0012] 1 and 2, a rectangular parallelepiped upper left bearing portion 18 is fixed to the upper portion between the pair of front-left support frames 14 and rear-left support frames 15 on the left side, and a rectangular parallelepiped lower left bearing portion 22 is arranged below that so as to be vertically movable. A rectangular parallelepiped upper right bearing portion 20 is fixed to the upper portion between the pair of front-right support frames 12 and rear-right support frames 13 on the right side, and a rectangular parallelepiped lower right bearing portion 24 is arranged below that so as to be vertically movable.

[0013] 1 and 2, an upper heating roll 26 is rotatably disposed between the upper left bearing portion 18 and the upper right bearing portion 20. The direction of the rotation axis of this upper heating roll 26 coincides with the left-right direction and is horizontal. A lower heating roll 28 is rotatably disposed between the lower left bearing portion 22 and the lower right bearing portion 24. The direction of the rotation axis of this lower heating roll 28 coincides with the left-right direction and is horizontal.

[0014] As shown in Figure 2, the device support frame 16 has an upper roll motor 36 disposed at the top and a lower roll motor 46 disposed at the bottom. The upper roll motor 36 rotates the upper heating roll 26 via an upper reducer 38 and an upper coupling device 40. The lower roll motor 46 rotates the lower heating roll 28 via a lower reducer 48 and a lower coupling device 50. The upper coupling device 40 and the lower coupling device 50 are made up of link coupling devices. A "link coupling device" is a skew joint that utilizes the crank motion of a link and is a coupling device that allows the shafts to move parallel to each other.

[0015] As shown in FIG. 2, a left pressure receiving portion 44 is provided on the underside of the lower left bearing portion 22. A left hydraulic cylinder 42 is provided on the base 11 located below the lower left bearing portion 22, and its piston 56 is movable up and down, with the tip of the piston 56 abutting against the left pressure receiving portion 44. The left hydraulic cylinder 42 constantly presses the lower left bearing portion 22 upward. A right pressure receiving portion 54 is provided on the underside of the lower right bearing portion 24. A right hydraulic cylinder 52 is provided on the base 11 located below the lower right bearing portion 24, and its piston 56 is movable up and down, with the tip of the piston 56 abutting against the right pressure receiving portion 54. The right hydraulic cylinder 52 constantly presses the lower right bearing portion 24 upward.

[0016] 1 and 2, a left cotter device 100 is disposed between the upper left bearing portion 18 and the lower left bearing portion 22, and adjusts the gap on the left side between the upper heating roll 26 and the lower heating roll 28. A right cotter device 102 is disposed between the upper right bearing portion 20 and the lower right bearing portion 24, and adjusts the gap on the right side between the upper heating roll 26 and the lower heating roll 28.

[0017] The base 11 is provided with an operation panel for operating and controlling the heating roll device 10, and a hydraulic unit for raising and lowering the left hydraulic cylinder 42 and the right hydraulic cylinder 52, but in this embodiment and in Figure 2, these are collectively shown as the control unit 30.

[0018] (2) Upper heating roll 26 and lower heating roll 28 Next, we will explain the structures of the upper heating roll 26 and the lower heating roll 28. First, we will explain the upper heating roll 26 with reference to the drawings.

[0019] 4, the upper heating roll 26 is made of metal, and an upper left rotating shaft 202 and an upper right rotating shaft 204 protrude from both the left and right side surfaces of a cylindrical upper roll body 200. The upper left rotating shaft 202 is rotatably disposed in the upper left bearing portion 18 via an upper left bearing 206. The upper right rotating shaft 204 is rotatably disposed in the upper right bearing portion 20 via an upper right bearing 208.

[0020] 2, the upper left rotating shaft 202 protrudes further from the upper left bearing portion 18 and is connected to the upper coupling device 40. The output shaft of the upper reducer 38 is connected to this upper coupling device 40, and when the upper roll motor 36 rotates, the rotation speed is reduced to a predetermined speed by the upper reducer 38, and the upper left rotating shaft 202, i.e., the upper heating roll 26, rotates via the upper coupling device 40.

[0021] As shown in Fig. 4, a main flow path 220 through which heated oil passes penetrates the center of the upper right rotating shaft 204, the upper roll body 200, and the upper left rotating shaft 202. This main flow path 220 is closed on the upper left rotating shaft 202 side and open on the upper right rotating shaft 204 side. A supply pipe 242 through which heated oil is supplied is connected to the opening of this upper right rotating shaft 204 via a rotating joint part 240. A supply pump (not shown) that supplies heated oil is connected to the end of the supply pipe 242.

[0022] As shown in Fig. 4, linear heating flow paths 222 penetrate the vicinity of the outer circumferential surface of the upper roll body 200 along the direction of the rotation axis. As shown in Figs. 6 and 7, 24 of these heating flow paths 222 are provided at equal angular intervals along the radial direction. As shown in Fig. 4, both left and right sides of the heating flow path 222 are open, and the openings on both the left and right sides are closed by annular lids 238. These lids 238 prevent heating oil from leaking from the heating flow paths 222.

[0023] 4, a linear connecting flow path 224 is provided inside the upper roll body 200, connecting one end of the heating flow path 222 to approximately the center of the main flow path 220. This connecting flow path 224 allows the heating oil flowing through the main flow path 220 to reach the heating flow path 222.

[0024] 6 to 8, a direct connection flow path 226 is provided to connect adjacent heating flow paths 222. This direct connection flow path 226 is bent in a dogleg shape and connects one end of adjacent heating flow paths 222 to one end of the heating flow path 222.

[0025] How the 24 heating flow paths 222 are connected by the connecting flow paths 224 and the direct connection flow paths 226 will be described with reference to Fig. 4 and Figs. 6 to 9. Fig. 6 is a left vertical cross-sectional view of the upper heating roll 26 with the lid 238 removed, Fig. 7 is a right vertical cross-sectional view, and Fig. 8 is a development view of the right side of the upper roll body 200. In Fig. 9, horizontal lines indicate the heating flow paths 222, diagonal dashed lines indicate the connecting flow paths 224, and V-shaped lines indicate the direct connection flow paths 226. In Figs. 7 to 9, the 24 heating flow paths 222 are numbered 1 to 24, respectively.

[0026] 9, attention will be focused on the first to third heating flow paths 222. As shown in FIGS. 6 to 8, the main flow path 220 is connected to the right end of the heating flow path 222 via a connecting flow path 224. A direct connection flow path 226 that extends obliquely to the axial direction, bends midway, and extends obliquely to the axial direction again, having an overall V-shaped configuration, is connected to the left end of the first heating flow path 222, and is also connected to the left end of the second heating flow path 222. The V-shaped direct connection flow path 226 is connected to the right end of the second heating flow path 222, and is connected to the third heating flow path 222. The left end of the third heating flow path 222 is connected to the main flow path 220 via the connecting flow path 224.

[0027] As a result, as shown in FIGS. 6 to 9, the heating oil flowing in the main flow path 220 flows through the connecting flow path 224 and into the right end of the first heating flow path 222.

[0028] Next, as shown in FIGS. 6 to 9, the heating oil flows from the right end to the left end of the first heating flow path 222, flows through the direct connection flow path 226, and flows to the left end of the second heating flow path 222.

[0029] Next, as shown in FIGS. 6 to 9, the heating oil flows from the left end to the right end of the second heating flow path 222, flows through the direct connection flow path 226, and flows to the right end of the third heating flow path 222.

[0030] Next, as shown in FIGS. 6 to 9, the heating oil flows from the right end to the left end of the third heating flow path 222 and circulates to the main flow path 220 via the connecting flow path 224.

[0031] 8, heating oil flows through the fourth to sixth heating flow paths 222 in the same manner as through the first to third heating flow paths 222. Similarly, heating oil flows through the remaining three heating flow paths 222 in groups, and the heating oil flows over the entire vicinity of the outer circumferential surface of the upper heating roll 26, thereby heating the entire upper heating roll 26.

[0032] The upper left rotating shaft 202 and the upper right rotating shaft 204 are heated by the heating oil flowing through the main flow path 220 and are heated to approximately the same temperature as the upper roll body 200 .

[0033] As shown in Fig. 4, the lower heating roll 28 has a structure similar to that of the upper heating roll 26. That is, a lower left rotating shaft 212 and a lower right rotating shaft 214 protrude from both the left and right side surfaces of the lower roll body 210. The lower left rotating shaft 212 is rotatably supported on the lower left bearing portion 22 by a lower left bearing 216. The lower right rotating shaft 214 is rotatably supported on the lower right bearing portion 24 by a lower right bearing 218.

[0034] A main flow path 220 is provided in the lower roll body 210, the lower left rotating shaft 212, and the lower right rotating shaft 214, and 24 heating flow paths 222 are provided near the outer circumferential surface of the lower roll body 210, and each is connected by a connecting flow path 224 and a direct connection flow path 226. This connection structure is the same as that of the upper heating roll 26.

[0035] 4, both left and right ends of the heating flow path 222 of the lower roll body 210 are closed by annular lids 238. The main flow path 220 of the lower left rotating shaft 212 is closed, and a supply pipe 242 is connected via a joint part 240 to the main flow path 220 that opens to the lower right rotating shaft 214.

[0036] (3) Upper left bearing portion 18, upper right bearing portion 20, lower left bearing portion 22, lower right bearing portion 24 Next, the structures of the upper left bearing portion 18, the upper right bearing portion 20, the upper left bearing portion 18, the lower left bearing portion 22, and the lower right bearing portion 24 will be described.

[0037] First, the upper right bearing portion 20 will be described with reference to Figures 2 and 5. As shown in Figure 5, vertically long rectangular fixing plates 252, 252 are provided on both the front and rear sides of the rectangular parallelepiped metal upper right bearing portion 20. These fixing plates 252, 252 protrude from the upper right bearing portion 20 and are fixed between the front right support frame 12 and the rear right support frame 13.

[0038] As shown in Fig. 5, the metallic upper right bearing portion 20 is approximately square when viewed from the right side, and electric heaters 254 are provided at the 2 o'clock, 4 o'clock, 8 o'clock, and 10 o'clock positions on an analog clock display, centered on the rotation axis of the upper heating roll 26. The 12 o'clock position is directly above on this analog clock display. As shown in Fig. 4, the electric heater 254 is cylindrical and is embedded in the upper right bearing portion 20 along the direction of the rotation axis.

[0039] 5, a first temperature sensor 256 is provided at the 3 o'clock position on an analog clock display centered on the rotation axis of the upper heating roll 26, and a second temperature sensor 258 is provided at the 9 o'clock position. As shown in FIG. 2, the first temperature sensor 256 and the second temperature sensor 258 are also cylindrical and are embedded in the upper right bearing part 20 along the direction of the rotation axis.

[0040] By operating the control unit 30, the four electric heaters 254 are heated and feedback controlled so that the temperature detected by the first temperature sensor 256 is maintained at a predetermined temperature (100° to 200°C). In addition, the second temperature sensor 258 constantly detects the temperature of the upper left bearing portion 18, and if the temperature rises above necessary levels (for example, 250°C) for some reason, the electric heaters 254 are stopped. The second temperature sensor 258 acts as a thermostat to prevent the temperature from rising too high.

[0041] Next, the upper left bearing portion 18 will be described. As shown in Fig. 1, fixing plates 250, 250 are provided on both the front and rear sides of the rectangular parallelepiped upper left bearing portion 18, protruding from the upper left bearing portion 18 and fixed between the front left support frame 14 and the rear left support frame 15. Also, as with the upper right bearing portion 20, four electric heaters 254, a first temperature sensor 256, and a second temperature sensor 258 are provided.

[0042] Similarly, the lower left bearing portion 22 and the lower right bearing portion 24 are provided with four electric heaters 254, a first temperature sensor 256, and a second temperature sensor 258. However, the lower left bearing portion 22 is movable up and down between the pair of front-left support frame 14 and rear-left support frame 15, and the lower right bearing portion 24 is movable up and down between the pair of front-right support frame 12 and rear-right support frame 13. This structure will be described later.

[0043] (4) Left cotter device 100 and right cotter device 102 Next, a description will be given of the left cotter device 100 and the right cotter device 102. First, the right cotter device 102 will be described with reference to Figs.

[0044] As shown in FIG. 5, the rectangular parallelepiped upper right bearing portion 20 and the lower right bearing portion 24 are approximately square when viewed from the right side. The lower surface of the upper right bearing portion 20 and the upper surface of the lower right bearing portion 24 are parallel and horizontally arranged. The right cotter device 102 is provided between them. As shown in FIGS. 5 and 10, the right cotter device 102 protrudes from the lower surface of the fixed upper right bearing portion 20 and has a first pedestal 110 whose protruding lower surface is horizontal. A second pedestal 112 protrudes from the upper surface of the movable lower right bearing portion 24 at a position corresponding to the first pedestal 110 and whose protruding upper surface has an inclined surface inclined in the front-to-rear direction. This second pedestal 112 is inclined so that it becomes lower, for example, as it approaches the exit (front).

[0045] As shown in FIG. 10 , a core block 114 is provided between the first pedestal 110 and the second pedestal 112. The core block 114 is wedge-shaped with its longitudinal direction extending in the front-to-rear direction so that it can fit between the first pedestal 110 and the second pedestal 112. The upper surface (first sliding surface) of the wedge-shaped core block 114 is horizontal, and the lower surface (second sliding surface) is inclined to correspond to the second pedestal 112. To facilitate movement of the core block 114 in the front-to-rear direction, a roller plate 116 is disposed between the upper surface (first sliding surface) of the core block 114 and the first pedestal 110, and a roller plate 118 is disposed between the lower surface (second sliding surface) of the core block 114 and the upper surface of the second pedestal 112. The roller plates 116 and 118 are formed by arranging a plurality of cylindrical rollers horizontally in the front-to-rear direction within a frame-like member. When the core block 114 moves, the rollers rotate, making it easier for the core block 114 to move.

[0046] 10, a cylindrical injection space 128 is provided in the front-rear direction inside the core block 114. Furthermore, a female screw portion 120 penetrates horizontally in the front-rear direction at the center of the interior of the core block 114. The inner diameter of the cylindrical injection space 128 is set to be larger than the inner diameter of the female screw portion 120.

[0047] As shown in Figure 10, a recess is provided in the front surface of the core block 114, which communicates with a cylindrical injection space 128 and has an open front surface. A nut 122 is fitted in the front-rear direction into the recess in the front surface of the core block 114. An internal thread portion 124 of this nut 122 is coaxial with and has the same radius as the internal thread portion 120 provided in the core block 114. As shown in Figure 10, a ring-shaped O-ring 126 is fitted between the outer peripheral surface of the nut 122 and the inner peripheral surface of the core block 114.

[0048] As shown in FIG. 10 , a male threaded portion 132 is threadedly engaged with the female threaded portion 120 of the core block 114, the cylindrical injection space 128, and the female threaded portion 124 of the nut 122. The rear end of the male threaded portion 132 protrudes further from the core block 114 and is supported by a screw receiving portion 134 that protrudes downward from the underside of the upper right bearing portion 20. Meanwhile, as shown in FIGS. 5 and 10 , the front end of the male threaded portion 132 penetrates the front right support frame 12 via a screw receiving portion 135, and a handle 136 is attached to the front end. Rotating this handle 136 rotates the male threaded portion 132, which in turn moves the wedge-shaped core block 114 in the front-to-rear direction, causing the lower right bearing portion 24 to move up and down by the inclination angle of the second pedestal 112. Note that the upper right bearing portion 20 does not move up and down because it is fixed to the front right support frame 12 and the rear right support frame 13. This allows the gap between the upper heating roll 26 and the lower heating roll 28 to be adjusted in units of 1 μm to 1 mm.

[0049] As shown in Figure 11, an injection port 130 opens on the side of a cylindrical injection space 128 inside the core block 114. A cotter pump 140, which is a compression pump, is connected to the injection port 130 via a cotter valve 138, which is an electromagnetic three-way valve. This means that even if the position of the core block 114 is adjusted with a handle 136, there is a possibility of slight misalignment due to gaps between the crests and roots of the female thread portions 120 and 124 and the male thread portion 132. For this reason, compressed air can be introduced from the cotter pump 140 into the space between the injection space 128 and the male thread portion 132 so that the crests of the male thread portion 132 are pressed against the roots of the female thread portions 120 and 124, thereby fixing the position of the core block 114 in the front-to-rear direction.

[0050] When it is desired to move the core block 114, the compressed air injected into the injection space 128 is exhausted from the injection port 130 using the cotter valve 138, the threaded engagement between the female thread portion 120, the female thread portion 124 and the male thread portion 132 is loosened, and the core block 114 is rotated using the handle 136.

[0051] Like the right cotter device 102, the left cotter device 100 has a first base 110, a second base 112, a core block 114, and a male threaded portion 132, and by turning a handle 136, the male threaded portion 132 screws into the female threaded portion 120 and the female threaded portion 124 of the nut 122, allowing the position of the core block 114 to be adjusted. Also, an injection space 128 is provided within the core block 114, and compressed air can be introduced from a cotter pump 140 to fix the position of the core block 114 in the front-to-rear direction.

[0052] Furthermore, when the lower left bearing portion 22 is lowered and separated from the upper left bearing portion 18, the first pedestal 110, roller plate 116, core block 114, and male thread portion 132 of the left cotter device 100 remain in the upper left bearing portion 18, and the roller plate 118 and second pedestal 112 are lowered together with the lower left bearing portion 22. The same applies to the right cotter device 102.

[0053] (5) Lower left bearing portion 22 and lower right bearing portion 24 Next, we will explain the mounting structure of the lower left bearing portion 22 and the lower right bearing portion 24. First, we will explain the mounting structure of the lower right bearing portion 24.

[0054] 2, as described above, the right hydraulic cylinder 52 is provided on the base 11. A piston 56 that moves up and down by heated oil pressure is provided on the top of the right hydraulic cylinder 52, and a pressing part 58 is provided on the upper end of the piston 56. The pressing part 58 is cylindrical, and its upper surface is conical.

[0055] 2, the right pressure receiving portion 54 on the underside of the lower right bearing portion 24 has a cylindrical portion that protrudes downward from the underside of the lower right bearing portion 24, and a hemispherical right pressure receiving portion 54 that bulges downward from the underside of this cylindrical portion. The tip of the pressing portion 58 of the right hydraulic cylinder 52 presses the center of the right pressure receiving portion 54, pressing the lower right bearing portion 24 upward.

[0056] 13, a pair of left and right front rails 64, 64 are provided on the left and right side surfaces of the front right support frame 12 corresponding to the lower right bearing portion 24. The pair of left and right front rails 64, 64 are made of thick metal plates and sandwich the front part of the lower right bearing portion 24 from both the left and right sides.

[0057] As shown in Figure 13, a pair of left and right rear rails 66, 66 are provided on the left and right side surfaces of the rear right support frame 13 corresponding to the lower right bearing portion 24. The pair of left and right rear rails 66, 66 are made of thick metal plates and sandwich the rear portion of the lower right bearing portion 24 from both the left and right sides. Movement in the left and right direction is prevented. 13, the left and right sides of the lower right bearing portion 24 are sandwiched between a pair of left and right front rails 64, 64 and a pair of left and right rear rails 66, 66, preventing movement in the left and right direction. The lower right bearing portion 24 is also movable in the up and down direction along the front rails 64, 64 and the rear rails 66, 66. The lower right bearing portion 24 is also movable in the front and back directions along the front rails 64, 64 and the rear rails 66, 66.

[0058] 13, a rectangular parallelepiped protrusion 68 protrudes from the front surface of the rectangular parallelepiped lower right bearing portion 24. The front surface of this protrusion 68 abuts against the rear surface of the front right support frame 12.

[0059] A rectangular parallelepiped pressing device 70 is fixed between the pair of front and rear rear rails 66, 66 of the rear right support frame 13. This pressing device 70 has a piston frame 72, an upper piston 78, and a lower piston 80. As shown in FIG. 14 , the rectangular parallelepiped piston frame 72 is rectangular when viewed from the rear, and has a circular upper recess 74 and a circular lower recess 76 at the top and bottom of the piston frame 72. A disk-shaped upper piston 78 is fitted into the circular upper recess 74, and a disk-shaped lower piston 80 is fitted into the circular lower recess 76.

[0060] As shown in Fig. 12, an upper injection space 82 is provided between the upper piston 78 and the upper recess 74, and a lower injection space 84 is provided between the lower piston 80 and the piston frame 72. An upper injection port 86 opens at the top of the piston frame 72 corresponding to the top of the upper injection space 82, and a lower injection port 88 opens at the bottom of the piston frame 72 corresponding to the bottom of the lower injection space 84. As shown in Fig. 14, an upper injection pipe 90 is connected to the upper injection port 86, and a lower injection pipe 92 is connected to the lower injection port 88. The upper injection pipe 90 and the lower injection pipe 92 form a single injection pipe 94, which is connected to a fixed pump 98 that supplies compressed air via a fixed valve 96 consisting of an electromagnetic three-way valve.

[0061] The role of the pressing device 70 is that, when the vertical position of the lower right bearing portion 24 is determined by the right hydraulic cylinder 52 and the right cotter device 102, compressed air is supplied from the fixed pump 98 to the upper injection space 82 and the lower injection space 84 via the fixed valve 96, injection pipe 94, upper injection pipe 90, and lower injection pipe 92, causing the upper piston 78 and the lower piston 80 to protrude forward, and pressing the protrusion 68 of the lower right bearing portion 24 against the front right support frame 12 as shown by the arrows in Figures 12 and 13, thereby fixing the position of the lower right bearing portion 24 in the front-to-rear direction.

[0062] The lower left bearing portion 22 has a similarly structured protrusion 68 and pressing device 70, and compressed air is supplied from the fixed pump 98 to the upper injection space 82 and the lower injection space 84, causing the upper piston 78 and the lower piston 80 to protrude forward, and pressing the lower left bearing portion 22 against the front left support frame 14 to fix its position in the fore-and-aft direction.

[0063] This allows accurate pressing without the lower right bearing portion 24 shaking even when the upper heating roll 26 and the lower heating roll 28 are rotated while being heated.

[0064] (6) Operating state of the heating roll device 10 The electrical configuration of the heating roll device 10 will be described with reference to the block diagram of FIG.

[0065] The control unit 30 including the hydraulic unit is connected to the left hydraulic cylinder 42, right hydraulic cylinder 52, upper roll motor 36, lower roll motor 46, fixed valve 96, fixed pump 98, cotter valve 138, four electric heaters (written as "heaters" in FIG. 3) 254 on the upper left, upper right, lower left, and lower right sides of the cotter pump 140, first temperature sensors 256 on the upper left, upper right, lower left, and lower right sides, and second temperature sensors 258 on the upper left, upper right, lower left, and lower right sides. Then, the control unit 30 controls the operations described below.

[0066] (7) Operating state of the heating roll device 10 The following describes the operating state when the heating roll device 10 performs a pressing operation. As described above, the up-down position and the front-rear position of the upper heating roll 26 are fixed relative to the pair of left and right front support frames 14 and 12 and the pair of left and right rear support frames 15 and 13.

[0067] First, the control unit 30 supplies heating oil from a supply pump (not shown) to the upper heating roll 26 and the lower heating roll 28, and heats the upper heating roll 26 and the lower heating roll 28 to a predetermined temperature (for example, 100° to 200°).

[0068] Next, the control unit 30 heats the four electric heaters 254 of the pair of upper left bearing portion 18 and upper right bearing portion 20 and the pair of lower left bearing portion 22 and lower right bearing portion 24, and performs feedback control using a first temperature sensor 256 so that the temperatures become the same as those of the upper heating roll 26 and the lower heating roll 28 (for example, 100° to 200°).The control unit 30 uses a second temperature sensor 258 to stop the electric heaters 254 when the maximum allowable temperature is reached.

[0069] Next, compressed air is sent into the pair of left and right upper injection spaces 82 and lower injection spaces 84 by the fixed pumps 98, 98 of the pair of left and right pressing devices 70, 70, respectively, and the upper piston 78 and lower piston 80 press the lower left bearing portion 22 and lower right bearing portion 24 against the front left support frame 14 and front right support frame 12, respectively, fixing the positions of the pair of left and right lower bearing portions 22 and 24 in the front-to-rear direction. The fixed pump 98 continues to send compressed air until the pressing operation is completed.

[0070] Next, the left hydraulic cylinder 42 and the right hydraulic cylinder 52 raise the lower left bearing portion 22 and the lower right bearing portion 24, thereby raising the lower heating roll 28, which is at a height for waiting without performing pressing work (hereinafter referred to as the "standby height"), to a height for pressing the web W (hereinafter referred to as the "press height").

[0071] Next, the left cotter device 100 and the right cotter device 102 adjust the gap between the lower peripheral surface of the upper heating roll 26 and the upper peripheral surface of the lower heating roll 28 to a gap for pressing (hereinafter referred to as the "press gap") in 1 μm increments by rotating the handle 136. At this time, the left cotter device 100 and the right cotter device 102 are adjusted so that the press gap has the same dimensions along the left-right direction.

[0072] Next, compressed air is sent to the injection spaces 128 of the left cotter device 100 and the right cotter device 102 by the cotter pump 140, and the male thread portion 132 is fixed so as not to move relative to the female thread portion 124. The cotter pump 140 continues to send compressed air until the pressing operation is completed.

[0073] Next, the left hydraulic cylinder 42 and the right hydraulic cylinder 52 temporarily lower the lower left bearing portion 22, the lower right bearing portion 24, and the lower heating roll 28 to the standby height.

[0074] Next, the web W is passed between the upper heating roll 26 and the lower heating roll 28.

[0075] Next, the lower heating roll 28, which is at the standby height, is raised again by the left hydraulic cylinder 42 and the right hydraulic cylinder 52, so that the lower left bearing portion 22 and the lower right bearing portion 24 reach the press height.

[0076] Next, the control unit 30 rotates the upper heating roll 26 and the lower heating roll 28 at a predetermined rotation speed using the upper roll motor 36 and the lower roll motor 46, thereby pressing the web W while heating it.

[0077] (8) Effects According to this embodiment, not only are the upper heating roll 26 and the lower heating roll 28 heated, but also the upper left bearing portion 18, the upper right bearing portion 20, the lower left bearing portion 22, and the lower right bearing portion 24. Therefore, there is no temperature difference between the upper heating roll 26 and the lower heating roll 28 at the start of the pressing operation, and there is no change in the dimensions of the upper left bearing portion 18, the upper right bearing portion 20, the lower left bearing portion 22, and the lower right bearing portion 24 due to thermal expansion. That is, when the heating roll device 10 starts operation, the temperatures of the upper left bearing portion 18, the upper right bearing portion 20, the lower left bearing portion 22, and the lower right bearing portion 24 are quickly increased by the electric heater 254, allowing the temperature to be stabilized quickly and reducing unevenness in the temperature distribution. Furthermore, the second temperature sensor 258 prevents the temperature from exceeding the maximum temperature, allowing thermal expansion to be controlled and dimensions to be stabilized. Furthermore, because there is no dimensional change in the four bearing parts during the pressing operation, there is no axial runout of the upper heating roll 26 and the lower heating roll 28, and the press gap can be maintained constant, making it possible to produce a stable web W. In addition, because the four bearing parts are not overheated, changes over time in the left cotter device 100 and the right cotter device 102 can be suppressed.

[0078] In addition, the four electric heaters 254 are located above, below, left and right of the upper left bearing portion 18, the upper right bearing portion 20, the lower left bearing portion 22 and the lower right bearing portion 24, so that the temperature distribution of each bearing portion can be made uniform.

[0079] In addition, the four electric heaters 254, the first temperature sensor 256, and the second temperature sensor 258 are cylindrical and inserted along the axial direction of the upper left bearing portion 18, the upper right bearing portion 20, the lower left bearing portion 22, and the lower right bearing portion 24, so that the temperature distribution in the axial direction of each bearing portion can also be made uniform.

[0080] According to the above embodiment, for the upper heating roll 26 and the lower heating roll 28, the heating oil sent from the main flow path 220 is sent to the heating flow path 222 via the connecting flow path 224, so not only can the entire outer periphery of the upper heating roll 26 and the lower heating roll 28 be heated, but the inside of the upper heating roll 26 and the lower heating roll 28 can also be heated evenly to a uniform temperature. In addition, the connecting flow path 224 and the direct connection flow path 226 can be used to smoothly send heating oil to the 24 heating flow paths 222.

[0081] According to the above embodiment, with the left cotter device 100 and the right cotter device 102, after adjusting the gap between the upper heating roll 26 and the lower heating roll 28, compressed air is injected into the injection space 128, thereby reliably fixing the threaded state of the female screw portion 120, the female screw portion 124 and the male screw portion 132, and no change in the gap occurs.

[0082] Furthermore, since an O-ring 126 is provided on the outer periphery of the nut 122, air does not leak out of the core block 114 even when compressed air is sent into the injection space 128.

[0083] After the pressing operation is completed, the compressed air in the injection space 128 can be exhausted by the cotter valve 138, so that the male screw portion 132 can be easily rotated by the handle 136.

[0084] According to the above embodiment, the lower left bearing portion 22 and the lower right bearing portion 24, which are provided so as to be freely movable up and down, are pressed against the front right support frame 12 and the front left support frame 14 by the pressing device 70, respectively, so that the lower left bearing portion 22 and the lower right bearing portion 24 are securely fixed without shaking in the front-to-back direction even during the pressing operation, and the pressing operation can be performed accurately.

[0085] In addition, since the fixed valve 96 allows air to be easily exhausted from the upper injection space 82 and the lower injection space 84, the lower left bearing portion 22 and the lower right bearing portion 24 can be easily moved up and down by the left hydraulic cylinder 42 and the right hydraulic cylinder 52.

[0086] Furthermore, the lower left bearing portion 22 and the lower right bearing portion 24 are supported by a pair of left and right front rails 64 and a pair of left and right rear rails 66, 66, respectively, and therefore do not shift in the left and right direction.

[0087] A modification of the above embodiment will now be described.

[0088] (1) Change example 1 In the above embodiment, 24 heating flow paths 222 are provided at equal angles on the upper heating roll 26 and the lower heating roll 28, but the number may be 25 or more, or may be less than 24, as long as they are provided at equal angles along the radial direction.

[0089] (2) Change example 2 In the above embodiment, the upper heating roll 26 and the lower heating roll 28 are provided with the main flow path 220, 24 heating flow paths 222, the connecting flow paths 224, and the direct connection flow paths 226. Alternatively, as shown in Fig. 15, a heating oil storage space 260 having a circular cross section is provided in the upper roll body 200 of the upper heating roll 26, and an electric heater 262 is provided along the direction of the rotation axis and penetrating the storage space 260. The electric heater 262 may then be heated to heat the heating oil stored in the storage space 260, thereby heating the entire upper heating roll 26. A similar structure may also be implemented for the lower heating roll 28.

[0090] (3) Change example 3 In the above embodiment, the two heating rolls are arranged one above the other as shown in FIGS. 1 and 2, but instead, they may be arranged one behind the other as shown in FIG.

[0091] The device shown in Figure 16 is a powder press device 300, in which heating rolls 302 and 304 are arranged in the front-to-rear direction, and their rotation shafts 307 and 308 are supported by a pair of left and right bearing parts 310 and 312 so that they can rotate freely in the left-to-right direction and horizontally.

[0092] A pair of left and right bearing portions 310 of one heating roll 302 are fixed in position in the front-rear direction and left-right direction to an apparatus frame (not shown).

[0093] The other heating roll 304 has a pair of left and right bearing portions 312 that are movable vertically between a pressing device 316 and a fixed portion 318 fixed to an apparatus frame (not shown), and is pressed toward the heating roll 302 (forward) by a pair of left and right hydraulic cylinders 320.

[0094] The metallic heating rolls 302 and 304 are heated by heating oil as in the above embodiment, and the pair of metallic left and right bearing portions 310 and 312 are also heated by an electric heater 254 as in the above embodiment.

[0095] A pair of left and right cotter devices 314 are provided between the pair of left and right bearing portions 310 and 312. The cotter device 314 is the same as the cotter device 102 shown in Fig. 10, except that the cotter device 314 is attached in the up-down direction rather than the front-to-back direction. The press gap between the heating rolls 302 and 304 can be adjusted by the pair of left and right cotter devices 314.

[0096] A pressing device 316 similar to the pressing device 70 shown in FIGS. 12 and 13 is provided above the bearing portion 312 of the heating roll 304, and presses and fixes the bearing portion 312 to a fixing portion 318 below the bearing portion 312 from above.

[0097] Then, heating rolls 302 and 304 heated by heating oil are rotated, and powder is dropped between them from a tank 306 and pressed while being heated, thereby producing a sheet-like web W.

[0098] (4) Change Example 4 In the above embodiment, the left cotter device 100 was provided between the upper left bearing portion 18 and the lower left bearing portion 22, and the right cotter device 102 was provided between the upper right bearing portion 20 and the lower right bearing portion 24, adjusting the gap between the upper heating roll 26 and the lower heating roll 28.

[0099] The left cotter device 100 and the right cotter device 102 having the injection space 128 may also be used for adjusting other gaps or heights. For example, they may be used to adjust the height of a coating die that applies a coating liquid and is located below a backup roll.

[0100] (5) Change Example 5 In the above embodiment, the pressing device 70 has two pistons, an upper piston 78 and a lower piston 80, but this is not limited to this and only one piston may be provided, or three pistons may be arranged in a triangular shape, or four pistons may be arranged in a square.

[0101] (6) Change Example 6 In the above embodiment, the male thread portion 132 is rotated by the handle 136, but instead, the male thread portion 132 may be rotated by a drive source such as a servo motor.

[0102] (7) Change Example 7 In the above embodiment, roller plate 116 is provided between core block 114 and first seat 110, and roller plate 118 is provided between core block 114 and second seat 112. However, these roller plates 116, 118 may not be provided and core block 114 may slide directly between first seat 110 and second seat 112, or another sliding member may be used to slide between them.

[0103] (8) Other Although one embodiment of the present invention has been described above, this embodiment is presented by way of example and is not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the scope of the invention and its equivalents as defined in the claims. [Explanation of symbols]

[0104] 10...heating roll device, 12...front right support frame, 13...rear right support frame, 14...front left support frame, 15...rear left support frame, 18...upper left bearing portion, 20...upper right bearing portion, 22...lower left bearing portion, 24...lower right bearing portion, 26...upper heating roll, 28...lower heating roll, 30...control portion, 42...left hydraulic cylinder, 52...right hydraulic cylinder, 70...pressing device, 72...piston frame, 78...upper piston, 80...lower piston, 82...upper injection space, 84...lower injection space, 98...fixed pump, 100...left cotter device, 102...right Cotter device, 110... first base, 112... second base, 114... core block, 120... female thread portion, 122... nut, 124... female thread portion, 128... injection space, 132... male thread portion, 136... handle, 140... cotter pump, 200... upper roll body, 202... upper left rotating shaft, 204... upper right rotating shaft, 210... lower roll body, 212... lower left rotating shaft, 214... lower right rotating shaft, 220... main flow path, 222... heating flow path, 224... connecting flow path, 226... direct connection flow path, 254... electric heater, 256... first temperature sensor, 258... second temperature sensor

Claims

1. a first base having a flat surface; a second base having an inclined surface facing the flat surface and inclined relative to the flat surface; a wedge-shaped core block disposed between the flat surface of the first base and the inclined surface of the second base; an injection space provided inside the core block; a block female screw portion extending in the longitudinal direction of the wedge-shaped core block and penetrating the injection space; a male thread portion that penetrates the female thread portion of the block; an injection means for injecting compressed air into the injection space; and a recess formed on the outer surface of the core block from which the male screw portion protrudes, the recess communicates with the injection space; A nut is fitted into the recess, The nut female screw portion of the nut and the block female screw portion are coaxial and have the same diameter. A cotter device characterized by:

2. an O-ring is provided on the outer periphery of the nut communicating with the injection space; The cotter device according to claim 1 .

3. a first base having a flat surface; a second base having an inclined surface facing the flat surface and inclined relative to the flat surface; a wedge-shaped core block disposed between the flat surface of the first base and the inclined surface of the second base; an injection space provided inside the core block; a block female screw portion extending in the longitudinal direction of the wedge-shaped core block and penetrating the injection space; a male thread portion that penetrates the female thread portion of the block; an injection means for injecting compressed air into the injection space; and a first roller plate disposed between the flat surface of the first base and the core block; a second roller plate disposed between the inclined surface of the second base and the core block; A cotter device comprising:

4. a first base having a flat surface; a second base having an inclined surface facing the flat surface and inclined relative to the flat surface; a wedge-shaped core block disposed between the flat surface of the first base and the inclined surface of the second base; an injection space provided inside the core block; a block female screw portion extending in the longitudinal direction of the wedge-shaped core block and penetrating the injection space; a male thread portion that penetrates the female thread portion of the block; an injection means for injecting compressed air into the injection space; and A handle or a motor for rotating the male screw portion is provided at the tip of the male screw portion. A cotter device characterized by:

5. A first roll; a second roll disposed parallel to the first roll; a pair of left and right first bearing portions that rotatably support the first roll; a pair of left and right second bearing portions that rotatably support the second roll; a left cotter device disposed between a left side of the first bearing portion and a left side of the second bearing portion; a right cotter device disposed between a right side of the first bearing portion and a right side of the second bearing portion; and the first bases of the pair of left and right cotter devices are provided on the pair of left and right first bearing portions, respectively; the second bases of the pair of left and right cotter devices are provided on the pair of left and right second bearing portions, respectively; The cotter device is a flat surface provided on the first base; an inclined surface provided on the second base, facing the flat surface and inclined relative to the flat surface; a wedge-shaped core block disposed between the flat surface of the first base and the inclined surface of the second base; an injection space provided inside the core block; a block female screw portion extending in the longitudinal direction of the wedge-shaped core block and penetrating the injection space; a male thread portion that penetrates the female thread portion of the block; an injection means for injecting compressed air into the injection space; A roll device comprising:

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