Structure of the roller bearing

Abstract

To provide a bearing part of a roll which prevents swinging of a pair of left and right bearing parts supporting the roll.SOLUTION: In a structure of a bearing part of a roll, a front left support frame 14 and a front right support frame 12, making a pair in a lateral direction, and a rear left support frame 15 and a rear right support frame 13, making a pair in the lateral direction, are erected vertically at a base 11. A lower left bearing part 22 is provided between the front left support frame 14 and the rear left support frame 15. A lower right bearing part 24 is provided between the front right support frame 12 and the rear right support frame 13. A lower heating roll 28 is supported so as to be rotatable in a horizontal direction between the lower left bearing part 22 and the lower right bearing part 24 making a pair in the lateral direction. A pressing device 70 which presses the lower left bearing part 22 to the rear left support frame 15 is provided, and a pressing device 70 which presses the lower right bearing part 24 to the rear right support frame 13 is provided.SELECTED DRAWING: Figure 1

Description

Technical Field

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[0001] The present invention relates to the structure of a bearing portion of a roll.

Background Art

[0002] When conveying a long web or the like, a plurality of rolls are used. This roll has a pair of left and right rotating shafts, and the pair of left and right rotating shafts are rotatably supported by a pair of left and right bearing portions. And the roll rotates passively by the tension of the web or rotates by being driven by a drive source such as a motor. <0​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​In this invention, a pair of left and right front left support frames and a front right support frame are erected vertically from a base, a pair of left and right rear left support frames and a rear right support frame are erected vertically from the base located behind the pair of left and right front left support frames and the front right support frame, a left bearing portion is provided between the front left support frame and the rear left support frame, a right bearing portion is provided between the front right support frame and the rear right support frame, a roll is supported so as to be rotatable in the horizontal direction between the pair of left and right left bearing portions and the right bearing portion, and a left piston is attached to the rear left support frame. A piston frame is provided, the left piston frame has a circular left recess, a disc-shaped left piston is fitted into the left recess, a left injection space is provided between the left piston and the left recess, a right piston frame is provided on the rear right support frame, the right piston frame has a circular right recess, a disc-shaped right piston is fitted into the right recess, a right injection space is provided between the right piston and the right recess, compressed air is sent into the left injection space and the left piston is pushed out, thereby the left bearing part The part from the right to the left to the aforementioned front left support frame Press and fix in a flat, surface-like manner. Then, compressed air is sent into the right injection space, causing the right piston to protrude, thereby the right bearing portion The part from the left to the right of The aforementioned front right support frame to Press and fix in a flat, surface-like manner. This is a structure for the bearing portion of a roll, characterized by the following: [Effects of the Invention]

[0007] According to the present invention, a pair of left and right bearing portions, The disc-shaped left piston and the disc-shaped right piston move forward. Left support frame and before Because it is pressed against the right support frame, the left and right bearing parts do not swing in the front-to-back direction. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view of the heating roll device of this embodiment. [Figure 2] This is a rear view of the heating roll device. [Figure 3] This is a block diagram of the heating roll device. [Figure 4] It is a longitudinal sectional view seen from the rear of the heating roll device. [Figure 5] It is a right side view of the heating roll device. [Figure 6] It is a left side view of the upper heating roll. [Figure 7] It is a right side view of the upper heating roll. [Figure 8] It is a partially developed view on the right side of the upper roll body of the upper heating roll. [Figure 9] It is a diagram for explaining the main flow path, heating flow path, connecting flow path, and directly connecting flow path in the upper heating roll. [Figure 10] It is a right side view of the right cutter device. [Figure 11] It is a longitudinal sectional view seen from the rear of the right cutter device. [Figure 12] It is a longitudinal sectional view of the pressing device on the right side. [Figure 13] It is a cross-sectional view seen from above the lower right bearing portion. [Figure 14] It is a rear view of the pressing device seen from the entrance side. [Figure 15] It is a longitudinal sectional view of the upper heating roll of Modification 2. [Figure 16] It is an explanatory diagram of the powder press device of Modification 3.

Mode for Carrying Out the Invention

[0009] Hereinafter, the heating roll device 10 of an embodiment of the present invention will be described with reference to FIGS. 1 to 14. The heating roll device 10 of the present embodiment presses a long web W with two heating rolls, and the web W is a film, a film coated with a coating liquid, a metal foil, or the like. In this description, as shown in FIG. 1, the web W flows in the front-rear direction from the entrance to the exit of the heating roll device 10, and the entrance side is defined as the rear and the exit side is defined as the front. When indicating the left-right direction, it is defined as the left-right direction when viewed from the rear to the front.

[0010] (1) Heating roll device 10 The overall outline of the heating roll device 10 of the present invention will be described with reference to FIGS. 1 and 2.

[0011] As shown in FIGS. 1 and 2, on the front part of the upper surface of the base 11 placed on the horizontal floor surface, a pair of left and right rectangular front left support frames 14 and front right support frames 12 are erected vertically in sequence, and on the rear part of the upper surface of the base 11, a pair of left and right rectangular rear left support frames 15 and rear right support frames 13 are erected vertically. Further, as shown in FIG. 2, on the left side of the front left support frame 14 and the rear left support frame 15, a device support frame 16 is erected vertically from the base 11.

[0012] As shown in FIGS. 1 and 2, an upper left bearing portion 18 of a rectangular parallelepiped is fixed to the upper part between the pair of front and rear left front left support frames 14 and rear left support frames 15 on the left side, and a lower left bearing portion 22 of a rectangular parallelepiped is arranged movably in the vertical direction below it. An upper right bearing portion 20 of a rectangular parallelepiped is fixed to the upper part between the pair of front and rear right front right support frames 12 and rear right support frames 13 on the right side, and a lower right bearing portion 24 of a rectangular parallelepiped is arranged movably in the vertical direction below it.

[0013] As shown in FIGS. 1 and 2, an upper heating roll 26 is rotatably arranged 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 arranged between the lower left bearing portion 2 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 at the top and a lower roll motor 46 at the bottom. The upper roll motor 36 rotates the upper heating roll 26 via an upper reduction gear 38 and an upper coupling device 40. The lower roll motor 46 rotates the lower heating roll 28 via a lower reduction gear 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 misaligned shaft coupling that utilizes the crank motion of a link, and is a coupling device that allows for parallel movement of the shaft.

[0015] As shown in Figure 2, a left pressure receiving section 44 is provided on the lower surface of the lower left bearing section 22. A left hydraulic cylinder 42 is provided on the base 11 located below the lower left bearing section 22, and its piston 56 is movable in the vertical direction, with the tip of the piston 56 in contact with the left pressure receiving section 44. The left hydraulic cylinder 42 constantly presses the lower left bearing section 22 upward. A right pressure receiving section 54 is provided on the lower surface of the lower right bearing section 24. A right hydraulic cylinder 52 is provided on the base 11 located below the lower right bearing section 24, and its piston 56 is movable in the vertical direction, with the tip of the piston 56 in contact with the right pressure receiving section 54. The right hydraulic cylinder 52 constantly presses the lower right bearing section 24 upward.

[0016] As shown in Figures 1 and 2, a left cotter device 100 is positioned between the upper left bearing 18 and the lower left bearing 22 to adjust the gap on the left side between the upper heating roll 26 and the lower heating roll 28. A right cotter device 102 is positioned between the upper right bearing 20 and the lower right bearing 24 to adjust the gap on the right side between the upper heating roll 26 and the lower heating roll 28.

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

[0018] (2) Upper heating roll 26 and lower heating roll 28 Next, the structure of the upper heating roll 26 and the lower heating roll 28 will be described. First, the upper heating roll 26 will be described with reference to the drawing.

[0019] As shown in Figure 4, the upper heating roll 26 is made of metal, and the upper left rotation shaft 202 and the upper right rotation shaft 204 protrude from the left and right sides of the cylindrical upper roll body 200. The upper left rotation shaft 202 is rotatably mounted on the upper left bearing portion 18 via the upper left bearing 206. The upper right rotation shaft 204 is rotatably mounted on the upper right bearing portion 20 via the upper right bearing 208.

[0020] As shown in Figure 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 reduction gear 38 is connected to this upper coupling device 40, and when the upper roll motor 36 rotates, the upper reduction gear 38 reduces the rotation speed to a predetermined speed, 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 Figure 4, a main passage 220 through which heating oil passes runs through the center of the upper right rotating shaft 204, the upper roll body 200, and the upper left rotating shaft 202. This main passage 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 heating oil is supplied, is connected to the opening of the upper right rotating shaft 204 via a rotating joint 240. A supply pump (not shown) that supplies heating oil is connected to the end of the supply pipe 242.

[0022] As shown in Figure 4, a linear heating channel 222 runs through the vicinity of the outer circumferential surface of the upper roll body 200 along the direction of the rotation axis. As shown in Figures 6 and 7, 24 of these heating channels 222 are provided at equal angles along the radial direction. As shown in Figure 4, both the left and right sides of the heating channel 222 are open, and these openings on both sides are closed with annular covers 238. These covers 238 prevent heating oil from leaking from the heating channel 222.

[0023] As shown in Figure 4, a linear connecting channel 224 is provided inside the upper roll body 200, connecting one end of the heating channel 222 to approximately the center of the main channel 220. Through this connecting channel 224, the heating oil flowing through the main channel 220 reaches the heating channel 222.

[0024] As shown in Figures 6 to 8, a direct connecting channel 226 is provided to connect adjacent heating channels 222. This direct connecting channel 226 is bent in a "V" shape and connects one end of an adjacent heating channel 222 to the other end of another heating channel 222.

[0025] The connection between the 24 heating channels 222 and the connecting channels 224 and the direct connection channels 226 will be explained with reference to Figures 4 and 6-9. Figure 6 is a left vertical cross-sectional view of the upper heating roll 26 with the cover 238 removed, Figure 7 is a right vertical cross-sectional view, and Figure 8 is an unfolded view of the right side of the upper roll body 200. In Figure 9, horizontal lines represent the heating channels 222, diagonal dashed lines represent the connecting channels 224, and the "L" shaped lines represent the direct connection channels 226. In Figures 7-9, the 24 heating channels 222 are numbered from 1 to 24.

[0026] In Figure 9, we focus on heating channels 1 to 3, 222. As shown in Figures 6 to 8, the main channel 220 is connected to the right end of the heating channels 222 via a connecting channel 224. A direct connection channel 226, which extends diagonally in the axial direction, bends midway, and then extends diagonally again in the axial direction, forming an overall "L" shape, is connected to the left end of heating channel 1, 222, and is also connected to the left end of heating channel 2, 222. The "L" shaped direct connection channel 226 is connected to the right end of heating channel 2, 222, and is connected to heating channel 3, 222. The left end of heating channel 3, 222, is connected to the main channel 220 via a connecting channel 224.

[0027] As a result, as shown in Figures 6 to 9, the heating oil flowing in the main channel 220 flows through the connecting channel 224 and reaches the right end of heating channel 222 (number 1).

[0028] Next, as shown in Figures 6 to 9, the heating oil flows from the right end to the left end of heating channel 222 No. 1, then flows through the direct connection channel 226 and flows to the left end of heating channel 222 No. 2.

[0029] Next, as shown in Figures 6 to 9, the heating oil flows from the left end to the right end of heating channel 222 (number 2), then flows through the direct connection channel 226 and flows to the right end of heating channel 222 (number 3).

[0030] Next, as shown in Figures 6 to 9, the heating oil flows from the right end to the left end of heating channel 222 (number 3), and circulates to the main channel 220 via the connecting channel 224.

[0031] As shown in Figure 8, heating oil flows through heating channels 4 to 6 222 in the same way as heating channels 1 to 3 222. Similarly, the three heating channels 222 form a set through which heating oil flows, ensuring that the heating oil reaches the entire vicinity of the outer 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 Figure 4, the lower heating roll 28 has the same structure as the upper heating roll 26. That is, the lower left rotation shaft 212 and the lower right rotation shaft 214 protrude from both the left and right sides of the lower roll body 210. The lower left rotation shaft 212 is rotatably supported in the lower left bearing portion 22 by the lower left bearing 216. The lower right rotation shaft 214 is rotatably supported in the lower right bearing portion 24 by the lower right bearing 218.

[0034] The lower roll body 210, the lower left rotation shaft 212, and the lower right rotation shaft 214 are provided with a main flow path 220. Near the outer surface of the lower roll body 210, 24 heating flow paths 222 are provided, each 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] Furthermore, as shown in Figure 4, both the left and right ends of the heating channel 222 of the lower roll body 210 are closed by annular covers 238. In addition, the main channel 220 of the lower left rotating shaft 212 is closed, and a supply pipe 242 is connected to the main channel 220 that opens to the lower right rotating shaft 214 via a joint 240.

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

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

[0038] As shown in Figure 5, the upper right metal bearing 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. Note that the top of this analog clock display is the 12 o'clock position. As shown in Figure 4, these electric heaters 254 are cylindrical and embedded in the upper right bearing 20 along the direction of the rotation axis.

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

[0040] The control unit 30 operates to heat the four electric heaters 254 and provides feedback control to maintain the temperature detected by the first temperature sensor 256 at a predetermined temperature (100° to 200°). The second temperature sensor 258 constantly detects the temperature of the upper left bearing section 18, and if the temperature rises excessively (for example, to 250°C) due to any factor, the electric heaters 254 are stopped. The second temperature sensor 258 acts as a thermostat to prevent overheating.

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

[0042] The lower left bearing section 22 and the lower right bearing section 24 are similarly equipped with four electric heaters 254, a first temperature sensor 256, and a second temperature sensor 258. However, the lower left bearing section 22 is vertically movable between a pair of front left support frames 14 and rear left support frames 15, and the lower right bearing section 24 is vertically movable between a pair of front right support frames 12 and rear right support frames 13. This structure will be explained later.

[0043] (4) Left cotter assembly 100 and right cotter assembly 102 Next, we will describe the left cotter assembly 100 and the right cotter assembly 102. First, we will describe the right cotter assembly 102 with reference to Figures 5, 10, and 11.

[0044] As shown in Figure 5, the upper right bearing portion 20 and the lower right bearing portion 24 of the rectangular parallelepiped 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 positioned. A right cotter device 102 is provided between them. As shown in Figures 5 and 10, the right cotter device 102 has a first base 110 that protrudes from the lower surface of the fixed upper right bearing portion 20, and the protruding lower surface is a horizontal surface. In addition, a second base 112 is provided that protrudes from the upper surface of the moving lower right bearing portion 24 at a position corresponding to the first base 110, and the protruding upper surface has an inclined surface that is tilted in the front-rear direction. This second base 112 is tilted such that it becomes lower as it goes towards the exit (front).

[0045] As shown in Figure 10, a core block 114 is provided between the first base 110 and the second base 112. The core block 114 is wedge-shaped with its longitudinal direction in the front-to-back direction so that it can be fitted between the first base 110 and the second base 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 base 112. A roller plate 116 is placed between the upper surface (first sliding surface) of the core block 114 and the first base 110 to facilitate movement of the core block 114 in the front-to-back direction, and a roller plate 118 is placed between the lower surface (second sliding surface) of the core block 114 and the upper surface of the second base 112. Both the roller plate 116 and the roller plate 118 consist of multiple cylindrical rollers arranged horizontally in the front-to-back direction within a frame-like structure. As the core block 114 moves, the rollers rotate, making it easier to move.

[0046] As shown in Figure 10, a cylindrical injection space 128 is provided inside the core block 114 in the front-to-back direction. Furthermore, a female threaded portion 120 penetrates horizontally through the center of the core block 114 in the front-to-back direction. The inner diameter of the cylindrical injection space 128 is set to be larger than the inner diameter of the female threaded portion 120.

[0047] As shown in Figure 10, a recess is provided on the front surface of the core block 114, communicating with a cylindrical injection space 128, and the front surface of the injection space 128 is open. A nut 122 is fitted in the front-to-back direction into the recess on the front surface of the core block 114. The female threaded portion 124 of this nut 122 is coaxial with and has the same radius as the female threaded portion 120 provided on the core block 114. As shown in Figure 10, a ring-shaped O-ring 126 is fitted between the outer circumferential surface of the nut 122 and the inner circumferential surface of the core block 114.

[0048] As shown in Figure 10, the male threaded portion 132 is screwed through 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 lower surface of the upper right bearing portion 20. On the other hand, as shown in Figures 5 and 10, the front end of the male threaded portion 132 passes through the front right support frame 12 via a screw receiving portion 135, and a handle 136 is provided at its front end. When this handle 136 is rotated, the male threaded portion 132 rotates, and the wedge-shaped core block 114 moves in the front-rear direction as a result, and the lower right bearing portion 24 moves up and down by the inclination angle of the second base 112. 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 distance 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 inlet 130 is opened 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 inlet 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 the handle 136, it may shift slightly due to the gap between the grooves and peaks of the female threads 120, 124 and the male threads 132. Therefore, compressed air is introduced from the cotter pump 140 into the space between the injection space 128 and the male threads 132, so that the peaks of the male threads 132 are pressed against the grooves of the female threads 120 and 124, thereby fixing the front-to-back position of the core block 114.

[0050] Then, if it is desired to move the core block 114, the cotter valve 138 exhausts the compressed air injected into the injection space 128 from the inlet 130, loosening the screwed connection between the female thread portion 120, the female thread portion 124, and the male thread portion 132, and allowing it to be rotated with the handle 136.

[0051] The left cotter assembly 100, like the right cotter assembly 102, has a first base 110, a second base 112, a core block 114, and a male threaded portion 132. By turning the handle 136, the male threaded portion 132 can be screwed into the female threaded portion 120 and the female threaded portion 124 of the nut 122, thereby adjusting the position of the core block 114. In addition, there is an injection space 128 inside the core block 114, and compressed air can be injected from the cotter pump 140 to fix the front-to-back position of the core block 114.

[0052] Furthermore, when the lower left bearing portion 22 is lowered and separates from the upper left bearing portion 18, the first base 110, roller plate 116, core block 114, and male screw portion 132 of the left cotter device 100 remain attached to the upper left bearing portion 18, while the roller plate 118 and second base 112 descend 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 describe the mounting structure of the lower left bearing portion 22 and the lower right bearing portion 24. First, we will describe the mounting structure of the lower right bearing portion 24.

[0054] As shown in Figure 2, the base 11 is provided with a right hydraulic cylinder 52, as described above. A piston 56 that moves vertically by heated hydraulic pressure is provided at the top of the right hydraulic cylinder 52, and a pressing part 58 is provided at the upper end of the piston 56. This pressing part 58 is cylindrical, and its upper surface is conical.

[0055] As shown in Figure 2, the right pressure receiving portion 54 located on the lower surface of the lower right bearing portion 24 has a cylindrical portion that protrudes downward from the lower surface of the lower right bearing portion 24, and a hemispherical right pressure receiving portion 54 that bulges downward from the lower surface 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, thereby pressing the lower right bearing portion 24 upward.

[0056] As shown in Figure 13, a pair of left and right front rails 64, 64 are provided on both the left and right sides 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 sides.

[0057] As shown in Figure 13, a pair of left and right rear rails 66, 66 are provided on both the left and right sides 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 of the lower right bearing portion 24 from both sides. Movement in the left and right direction is prevented. As shown in Figure 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, thus preventing movement in the left-right direction. In addition, the lower right bearing portion 24 is movable in the vertical direction along the front rails 64, 64 and the rear rails 66, 66. Furthermore, the lower right bearing portion 24 is also movable in the front-rear direction along the front rails 64, 64 and the rear rails 66, 66.

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

[0059] A rectangular pressing device 70 is fixed between a pair of front and 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 Figure 14, the rectangular piston frame 72 is rectangular when viewed from the rear, and circular upper recesses 74 and 76 are provided at the top and bottom of the piston frame 72, respectively. A disc-shaped upper piston 78 is fitted into the circular upper recess 74, and a disc-shaped lower piston 80 is fitted into the circular lower recess 76.

[0060] As shown in Figure 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, which corresponds to the upper part of the upper injection space 82, and a lower injection port 88 opens at the bottom of the piston frame 72, which corresponds to the lower part of the lower injection space 84. As shown in Figure 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, to which a fixed pump 98 that supplies compressed air is connected via a fixed valve 96 consisting of an electromagnetic three-way valve.

[0061] The role of the pressing device 70 is that, once the vertical position of the lower right bearing portion 24 is determined by the right hydraulic cylinder 52 and the right cotter device 102, it supplies compressed air 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, 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 front-rear position of the lower right bearing portion 24.

[0062] The lower left bearing portion 22 also has a similar structure with a protrusion 68 and a pressing device 70, which supplies compressed air 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 front-rear direction.

[0063] This allows for precise pressing without the lower right bearing 24 shaking, even when the upper heating roll 26 and 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 explained with reference to the block diagram in Figure 3.

[0065] The control unit 30, which includes the hydraulic unit, is connected to the left hydraulic cylinder 42, the right hydraulic cylinder 52, the upper roll motor 36, the lower roll motor 46, the fixed valve 96, the fixed pump 98, the cotter valve 138, and four electric heaters (referred to as "heaters" in Figure 3) 254 on the upper left, upper right, lower left, and lower right sides of the cotter pump 140, as well as 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. The control unit then performs the operations described below.

[0066] (7) Operating state of the heating roll device 10 The operation of the heating roll device 10 when performing a pressing operation will now be described. As mentioned above, the vertical and horizontal positions of the upper heating roll 26 are fixed to a pair of left and right front left support frames 14 and front right support frame 12, and a pair of left and right rear left support frames 15 and rear right support frame 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 in each of the pair of upper left bearings 18 and upper right bearing 20, and the pair of lower left bearings 22 and lower right bearing 24, and uses the first temperature sensor 256 to perform feedback control so that the upper heating roll 26 and the lower heating roll 28 reach the same temperature (for example, 100° to 200°). The control unit 30 also uses the second temperature sensor 258 to stop the electric heaters 254 when the maximum allowable temperature is reached.

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

[0070] Next, the lower heating roll 28, which is at a height for waiting without performing pressing operations (hereinafter referred to as the "waiting height"), is raised from the left hydraulic cylinder 42 and the right hydraulic cylinder 52 to the height for pressing the web W (hereinafter referred to as the "pressing height") by raising the lower left bearing section 22 and the lower right bearing section 24.

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

[0072] Next, the cotter pump 140 supplies compressed air to the injection spaces 128 of the left cotter device 100 and the right cotter device 102, fixing the male threaded portion 132 in place so that it does not move relative to the female threaded portion 124. The cotter pump 140 continues to supply compressed air until the pressing operation is completed.

[0073] Next, the left hydraulic cylinder 42 and the right hydraulic cylinder 52 lower the lower left bearing section 22, the lower right bearing section 24, and the lower heating roll 28 to a 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 standby height, is raised again to press height by the left hydraulic cylinder 42 and the right hydraulic cylinder 52, with the lower left bearing portion 22 and the lower right bearing portion 24 being raised again.

[0076] Next, the control unit 30 uses the upper roll motor 36 and the lower roll motor 46 to rotate the upper heating roll 26 and the lower heating roll 28 at a predetermined rotational speed, 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 the upper left bearing portion 18, upper right bearing portion 20, lower left bearing portion 22, and lower right bearing portion 24 are also heated. As a result, there is no temperature difference between the upper heating roll 26 and the lower heating roll 28 at the start of the press operation, and there is no dimensional change due to thermal expansion of the upper left bearing portion 18, upper right bearing portion 20, lower left bearing portion 22, and lower right bearing portion 24. In other words, at the start of operation of the heating roll device 10, the temperature of the upper left bearing portion 18, upper right bearing portion 20, lower left bearing portion 22, and lower right bearing portion 24 rises immediately by the electric heater 254, so the temperature can be stabilized quickly and the unevenness of the temperature distribution can be reduced. In addition, since the second temperature sensor 258 can prevent the temperature from exceeding the maximum temperature, thermal expansion can be controlled and the dimensions can be stabilized. Furthermore, because there is no dimensional change in each of the four bearing sections during the pressing operation, there is no axial runout between the upper heating roll 26 and the lower heating roll 28, allowing the press gap to be maintained at a constant level and enabling the production of a stable web W. In addition, since the four bearing sections do not overheat, changes in the left cotter device 100 and the right cotter device 102 over time can be suppressed.

[0078] Furthermore, since the four electric heaters 254 are located above, below, and to the left and right of the upper left bearing section 18, upper right bearing section 20, lower left bearing section 22, and lower right bearing section 24, the temperature distribution of each bearing section can be made uniform.

[0079] Furthermore, the four electric heaters 254, the first temperature sensor 256, and the second temperature sensor 258 are cylindrical in shape and are inserted along the axial directions 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, thus enabling a uniform temperature distribution in the axial direction of each bearing portion.

[0080] According to the above embodiment, with respect to 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. This allows not only to heat the entire circumference of the outer surfaces of the upper heating roll 26 and the lower heating roll 28, but also to heat the inside of the upper heating roll 26 and the lower heating roll 28 without temperature unevenness. Furthermore, the heating oil can be smoothly delivered to the 24 heating flow paths 222 using the connecting flow path 224 and the direct flow path 226.

[0081] According to the above embodiment, with a left cotter device 100 and a right cotter device 102, after adjusting the gap between the upper heating roll 26 and the lower heating roll 28, compressed air is introduced into the injection space 128, thereby reliably fixing the screwed state of the female screw portion 120, the female screw portion 124 and the male screw portion 132, and preventing any change in the gap.

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

[0083] Furthermore, after the pressing operation is complete, the compressed air in the injection space 128 can be exhausted by the cotter valve 138, allowing the male screw portion 132 to be easily rotated with 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 to be vertically movable, are pressed against the front right support frame 12 and the front left support frame 14 by the pressing device 70, respectively. As a result, the lower left bearing portion 22 and the lower right bearing portion 24 are securely fixed without swaying in the front-rear direction even during pressing work, and the pressing work is performed accurately.

[0085] Furthermore, 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 section 22 and the lower right bearing section 24 can be easily moved up and down by the left hydraulic cylinder 42 and the right hydraulic cylinder 52.

[0086] Furthermore, since 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, they do not shift in the left-right direction. (Example of modification)

[0087] Examples of modifications to the above embodiment will be described below.

[0088] (1) Example of change 1 In the above embodiment, the upper heating roll 26 and the lower heating roll 28 are provided with 24 heating channels 222 at equal angles, but there may be 25 or more channels, or fewer than 24 channels, as long as they are at equal angles along the radial direction.

[0089] (2) Example of change 2 In the above embodiment, the upper heating roll 26 and the lower heating roll 28 are provided with a main flow path 220, 24 heating flow paths 222, a connecting flow path 224, and a direct connection flow path 226. Alternatively, as shown in Figure 15, the upper heating roll 26 may be provided with a heating oil storage space 260 with a circular cross-section in the upper roll body 200, and an electric heater 262 may be 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 can be implemented for the lower heating roll 28.

[0090] (3) Example of change 3 In the above embodiment, the two heating rolls are arranged vertically as shown in Figures 1 and 2, but instead, they may be arranged front to back as shown in Figure 16.

[0091] The apparatus shown in Figure 16 is a powder press apparatus 300, in which heating rolls 302 and 304 are arranged in the front-to-back direction, and their rotating shafts 307 and 308 are supported by a pair of left and right bearings 310 and 312 so as to be able to rotate freely in the left-to-right direction and horizontally.

[0092] One of the heating rolls 302 has a pair of left and right bearings 310 fixed to a device frame (not shown) in both the front-to-back and left-to-right directions.

[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 a device frame (not shown), and are pressed toward the heating roll 302 (forward) by a pair of left and right hydraulic cylinders 320.

[0094] The metal heating rolls 302 and 304 are heated with heating oil, as in the above embodiment. The pair of metal bearings 310 and 312 are also heated with an electric heater 254, as in the above embodiment.

[0095] A pair of left and right cotter devices 314 are provided between the left and right bearing sections 310 and 312. The cotter devices 314 are the same as the cotter device 102 shown in Figure 10, the only difference being that the cotter devices 314 are mounted in the vertical direction rather than the front and back direction. The press gap between the heating rolls 302 and 304 can be adjusted using the pair of left and right cotter devices 314.

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

[0097] Then, heating rolls 302 and 304, heated with heating oil, are rotated, and powder is dropped from tank 306 between them, heated and pressed to produce a sheet-like web W.

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

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

[0100] (5) Example of change 5 In the above embodiment, the pressing device 70 was provided with two pistons, an upper piston 78 and a lower piston 80. However, it is not limited to this configuration; it may also be provided with only one piston, or three pistons arranged in a triangular shape, or four pistons arranged in a square shape.

[0101] (6) Others Although one embodiment of the invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented 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 variations are included in the scope and essence of the invention, as well as in the claims of the invention and its equivalents. [Explanation of symbols]

[0102] 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 section, 20...Upper right bearing section, 22...Lower left bearing section, 24...Lower right bearing section, 26...Upper heating roll, 28...Lower heating roll, 30...Control unit, 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 assembly, 110...First base, 112...Second base, 114...Core block, 120...Female thread section, 122...Nut, 124...Female thread section, 128...Injection space, 132...Male thread section, 136...Handle, 140...Cotter pump, 200...Upper roll body, 202...Upper left rotation shaft, 204...Upper right rotation shaft, 210...Lower roll body, 212...Lower left rotation shaft, 214...Lower right rotation 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 pair of front left support frames and a front right support frame are erected vertically from the base. A pair of left and right front support frames and a pair of right rear support frames are erected vertically from the base located behind the front left support frame and the front right support frame. A left bearing portion is provided between the front left support frame and the rear left support frame. A right bearing portion is provided between the front right support frame and the rear right support frame. A roll is supported so as to be able to rotate horizontally between a pair of left and right bearing portions, The left piston frame is provided on the rear left support frame. The left piston frame is provided with a circular left recess, A disc-shaped left piston is fitted into the aforementioned left recess. A left injection space is provided between the left piston and the left recess. The right piston frame is provided on the rear right support frame. The right piston frame is provided with a circular right recess. A disc-shaped right piston is fitted into the aforementioned right recess. A right injection space is provided between the right piston and the right recess. By sending compressed air into the left injection space and causing the left piston to protrude, the portion of the left bearing from the right to the left side is pressed and fixed in a planar manner against the front left support frame. By sending compressed air into the right injection space and causing the right piston to protrude, the portion of the right bearing from the left to the right side is pressed in a planar manner against the front right support frame and fixed in place. A structure for the bearing portion of a roll, characterized by the above.

2. An upper roll is positioned above the aforementioned roll and parallel to it. A pair of left and right upper bearings, an upper left bearing and an upper right bearing, are provided above a pair of left and right left bearings and a right bearing, which rotatably support the upper roll. The structure of the bearing portion of the roll according to claim 1.

3. A left hydraulic cylinder is provided on the base located between the front left support frame and the rear left support frame. A right hydraulic cylinder is provided on the base located between the front right support frame and the rear right support frame. The left hydraulic cylinder presses the left bearing upward toward the upper left bearing, The right hydraulic cylinder is pressing the right bearing upward toward the upper right bearing. The structure of the bearing portion of the roll according to claim 2.

4. A left cotter device for adjusting the gap between the upper roll and the roll is provided between the lower surface of the upper left bearing and the upper surface of the left bearing. A right cotter device for adjusting the gap between the upper roll and the roll is provided between the lower surface of the upper right bearing and the upper surface of the right bearing. The structure of the bearing portion of the roll according to claim 3.

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