Cutting device, plate-shaped body manufacturing device, gypsum board manufacturing device, and gypsum board manufacturing method

Abstract

Provided is a cutting device for cutting a transported plate-shaped body, the cutting device being provided with a rotary cutter including a lower unit disposed below the plate-shaped body and having a roller and a lower blade attached to the roller, and a pressing device provided to the lower unit and pressing the plate-shaped body.

Description

Technical Field

[0001] The present invention relates to a cutting device, a plate-shaped body manufacturing device, a gypsum board manufacturing device, and a gypsum board manufacturing method. Background Art

[0002] Patent document 1 discloses a method for cutting a hydraulically hardened molded body, which is characterized in that a pair of cutters having saw blades are arranged opposite to each other between a flat hydraulically hardened molded body in a wet state, the saw blades are inserted into the molded body from both sides to cut the molded body, and the saw blades are swung along their length direction.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 53-75586 Summary of the invention

[0006] Problems to be solved by the invention

[0007] Among ceramic products such as gypsum boards and resin products, plate-like bodies having a plate-like shape have been conventionally manufactured as products and used in various applications.

[0008] The manufacturing method of the plate-like product is different depending on the product to be manufactured, for example, the raw materials are kneaded and formed to form a semi-finished product having a plate shape, the semi-finished product is transported by a transport means, and cut, dried, sintered, etc. as needed to manufacture. In addition, when cutting, a cutting device including a rotating cutter disclosed in Patent Document 1 has been used.

[0009] However, the cut surface of the plate-like body may come into contact with a conveying device provided downstream of the rotary cutter along the conveying direction of the plate-like body. If the cut surface of the plate-like body comes into contact with the conveying device, the material of the plate-like body may adhere to the conveying device, causing defects on the surface of the subsequent plate-like body that contacts the conveying device. In addition, if the cut surface of the plate-like body comes into contact with the conveying device, the plate-like body may be damaged, resulting in defective products that do not meet the specifications.

[0010] In view of the above-mentioned problems of the prior art, one aspect of the present invention is to provide a cutting device that can prevent a conveying device for conveying a plate-like body from contacting a cut surface of the plate-like body after cutting, causing the material of the plate-like body to adhere to the conveying device and thus damage the plate-like body.

[0011] Methods for solving problems

[0012] In order to solve the above-mentioned problems, according to one embodiment of the present invention, there is provided a cutting device for cutting a plate-like body to be transported, comprising:

[0013] a rotary cutter including a lower unit disposed below the plate-like body and having a roller and a lower blade mounted on the roller, and

[0014] A pressing device is provided in the lower unit and presses the plate-like body.

[0015] Effects of the Invention

[0016] According to one aspect of the present invention, a cutting device can be provided which can prevent a conveying device for conveying a plate-like body from coming into contact with a cut surface of the plate-like body after cutting, causing the material of the plate-like body to adhere to the conveying device and thus damaging the plate-like body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an explanatory diagram of the cutting device in the embodiment of the present invention.

[0018] Figure 2A This is an explanatory diagram of the positional relationship between a conveyor device near a rotary blade included in a conventional cutting device and a plate-like body.

[0019] Figure 2B It is an explanatory diagram of the positional relationship between the transport device near the rotary blade included in the cutting device in the embodiment of the present invention and the plate-like body.

[0020] Figure 3A This is an explanatory diagram of an example of the structure of a pressing device.

[0021] Figure 3B This is an explanatory diagram of an example of the structure of a pressing device.

[0022] Figure 3C This is an explanatory diagram of an example of the structure of a pressing device.

[0023] Figure 3D This is an explanatory diagram of an example of the structure of a pressing device.

[0024] Figure 3E This is an explanatory diagram of an example of the structure of a pressing device.

[0025] Figure 3F This is an explanatory diagram of an example of the structure of a pressing device.

[0026] Figure 4 It is an explanatory diagram of the gypsum board manufacturing apparatus in the embodiment of the present invention. DETAILED DESCRIPTION

[0027] Hereinafter, the present specific embodiments will be described with reference to the drawings. However, the present invention is not limited to the following embodiments, and various modifications and substitutions may be made to the following embodiments without departing from the scope of the present invention.

[0028] [Cutting device]

[0029] Hereinafter, the cutting device according to the present embodiment will be described using the drawings.

[0030] Figure 1 A side view showing a configuration example of the cutting device 10 according to the present embodiment.

[0031] Figure 2A An explanatory diagram showing the positional relationship between a conveyor and a plate-like body when the plate-like body is cut by a conventional rotary cutter. Figure 2B An explanatory diagram showing the positional relationship between the transport device and the plate-like body when the plate-like body is cut by the rotary blade included in the cutting device of the present embodiment.

[0032] Figure 3A to Figure 3F A configuration example of a pressing device is shown.

[0033] Figure 1 , Figure 2A , Figure 2B , Figure 3A to Figure 3F The X-axis in represents the conveying direction of the plate-like body. The Y-axis is an axis along the length of the roller of the rotating cutter and the width of the plate-like body. The Z-axis represents the height direction. Figure 1 In the figure, the plate-like body 11 is transported from right to left along the X-axis. The above drawings are schematic diagrams for explaining the structure of the cutting device of the present embodiment, and do not accurately describe dimensions and the like.

[0034] The cutting device of the present embodiment is a cutting device 10 that cuts a plate-like body 11 being transported.

[0035] The cutting device 10 of this embodiment includes a rotating tool 12, which includes: a roller 122b arranged below the plate-like body 11, and a lower unit 12b having a lower blade 121b mounted on the roller 122b. In addition, the cutting device 10 of this embodiment includes a pressing device 123 provided in the lower unit 12b to press the plate-like body 11.

[0036] (1) Components of the cutting device

[0037] Hereinafter, each component included in the cutting device 10 will be described.

[0038] (1-1) Rotating tool

[0039] The rotating tool 12 is as follows Figure 1 As shown in FIG. 1 , the lower unit 12 b is disposed below the plate-like body 11 .

[0040] The lower unit 12b is as follows Figure 1 As shown, there are a roller 122b parallel to the Y axis and a lower blade 121b attached to the roller 122b.

[0041] The rotary cutter 12 may further include an upper unit 12a. The upper unit 12a includes a roller 122a parallel to the Y axis and an upper blade 121a attached to the roller 122a, similarly to the lower unit 12b.

[0042] The rotating cutter 12 can make the upper unit 12a and the lower unit 12b respectively move along Figure 1 The rotary cutter 12 rotates as indicated by arrows A and B. When the upper blade 121a and the lower blade 121b of the two units reach opposing positions, the plate-like body 11 can be sandwiched and cut by the upper blade 121a and the lower blade 121b.

[0043] When cutting the plate-like body 11, it is usually required to cut the plate-like body 11 in a manner that the plate-like body 11 can be divided along a cutting line provided along the width of the plate-like body 11. Therefore, the upper blade 121a and the lower blade 121b are preferably provided continuously along the length of the rollers 122a and 122b.

[0044] Furthermore, the rollers 122a and 122b can have a rotation axis along the Y axis, and as described above, can rotate along arrows A and B. Therefore, a driving device such as a motor (not shown) is connected to the rollers 122a and 122b.

[0045] (1-2) Pressing device

[0046] As described above, conventionally, when a plate-like body is cut by a rotating blade, the cut surface of the plate-like body may come into contact with a conveying device provided downstream of the rotating blade along the conveying direction of the plate-like body. The inventors of the present invention have studied the cause of the above phenomenon.

[0047] here, Figure 2A The enlarged view shows a conventional rotary blade 12 and the periphery of a downstream transport device 131 disposed downstream of the rotary blade 12 along the transport direction of the plate-like body 11 . Figure 2A As shown in the figure, when the plate-like body 11 is cut by the rotating cutter 12, the vicinity of the cut surface 11A may bend and sag downward depending on the material and thickness of the plate-like body 11. This is because the vicinity of the cut surface 11A is supported by other plate-like bodies as a whole before cutting, but after cutting, such support is lost and the self-weight of the vicinity of the cut surface 11A cannot be supported. Therefore, the cut surface 11A of the plate-like body 11, especially the corner of the cut surface 11A, contacts the downstream side transport device 131 arranged on the downstream side of the transport direction of the plate-like body 11.

[0048] Therefore, the inventors of the present invention conducted further research. Figure 2BAs shown in FIG. 1 , the present invention has been studied to configure a pressing device 123 for pressing the plate-like body 11 in the lower unit 12b. As a result, it has been found that the position of the cut surface 11A of the plate-like body 11 can be displaced upward by the pressing device 123, and even when the plate-like body 11 is bent, the cut surface 11A of the plate-like body 11 can be prevented from contacting the downstream transport device 131, thereby completing the present invention.

[0049] Therefore, the cutting device 10 of this embodiment can be provided with a pressing device 123. Since the cutting device 10 has the pressing device 123, even if the vicinity of the cut surface 11A of the plate-like body is bent, it is possible to prevent the plate-like body 11 from contacting the downstream transport device 131. Therefore, it is possible to prevent the material of the plate-like body 11 from adhering to the downstream transport device 131 as a transport device, thereby preventing the plate-like body 11 from being damaged.

[0050] The structure of the pressing device 123 is not particularly limited, and the pressing device 123 may be configured so as to press the plate-like body 11 after the plate-like body 11 is cut by the rotating blade 12 .

[0051] So, for example Figure 1 As shown in the figure, the pressing device 123 can be arranged at a position where the roller 122b of the lower unit 12b contacts the plate-like body 11 cut by the lower blade 121b when the roller 122b of the lower unit 12b rotates along the arrow B. That is, the components can be arranged on the roller 122b of the lower unit 12b so as to be sequentially located at the lower blade 121b and the pressing device 123 along the rotation direction of the roller 122b. In addition, by selecting the distance between the lower blade 121b and the pressing device 123 along the rotation direction of the roller 122b, the time until the pressing device 123 presses after the plate-like body 11 is cut can also be adjusted.

[0052] The shape of the pressing device 123 is not particularly limited, and the shape can be selected in a manner to press the plate-like body 11. The pressing device 123 preferably does not produce defects on the bottom of the plate-like body 11 when pressing the plate-like body 11, so the portion in contact with the plate-like body 11 is preferably a curved surface. By making the portion in contact with the plate-like body 11 of the pressing device 123 a curved surface, it is possible to suppress the application of force to the plate-like body 11 locally when the pressing device 123 is in contact with the plate-like body 11, thereby preventing the plate-like body 11 from being greatly deformed and causing defects on the plate-like body 11. The pressing device 123, for example, Figure 2B As shown, on a plane perpendicular to the length of the roller 122b, the portion 1231 in contact with the plate-like body 11 is preferably a curved line, more preferably an upwardly convex curve.

[0053] The shape of the pressing device 123 is not particularly limited, and the pressing device 123 can have a columnar shape along the length of the roller 122 b .

[0054] For example Figure 1 , Figure 3A As shown, in the pressing device 123, the cross section perpendicular to the length of the roller 122b can be circular, and the pressing device 123 can be cylindrical as a whole. In addition, the circular shape can be a perfect circle or an ellipse.

[0055] Figure 3A In the figure, the pressing device 123 is shown to have a continuous cylindrical shape along the length of the roller 122b, but it is not limited to this form. Figure 3B As shown in FIG. 1 , a plurality of pressing devices 123 shorter than the length along the length of the roller 122b may be arranged along the length of the roller 122b. That is, the pressing device 123 may be arranged intermittently along the length of the roller 122b. When a plurality of pressing devices 123 are arranged along the length of the roller 122b, the pressing devices 123 preferably have the same cross-sectional shape in a plane perpendicular to the length of the roller 122b.

[0056] However, the pressing device 123 is Figure 3A As shown in the figure, it is preferably set continuously along the length of the roller 122b. By setting the pressing device 123 continuously along the length of the roller 122b, the bottom of the plate-like body 11 can be evenly pushed along the width of the plate-like body 11, thereby preventing the plate-like body 11 from having defects.

[0057] Figure 3C As shown, in the pressing device 123, the cross section perpendicular to the length of the roller 122b can be semicircular, so that the entire shape of the pressing device 123 can be a semi-cylindrical shape.

[0058] Figure 3D As shown, the pressing device 123 may be composed of a plurality of components arranged along the outer circumference of the roller 122b. Figure 3D As shown, it is possible to have pressing devices 123A, 123B of different sizes along the periphery of the roller 122b. In addition, the sizes of some or all of the pressing devices may be the same. Specifically, for example Figure 3D As shown in the figure, cylindrical pressing devices 123A and 123B having different outer diameters and cross-sectional areas can be arranged along the outer periphery of the roller 122b. By arranging a plurality of pressing devices 123 having different sizes along the outer periphery of the roller 122b, the pressing amount of the plate-like body 11 can be changed along with the rotation of the roller 122b, and the pressing amount can be precisely adjusted. Therefore, it is particularly possible to prevent the plate-like body 11 from being flawed. Figure 3D In the example shown, two pressing devices 123A and 123B with different configuration sizes are configured, but more than three pressing devices may be configured. Figure 3DIn the example shown, both the pressing devices 123A and 123B are cylindrical, but the present invention is not limited to this form. When the pressing device 123 has a plurality of members, the shape of some or all of the members may be different from that of the other members.

[0059] Figure 3E As shown, the pressing device 123 can be irregularly shaped with respect to a plane perpendicular to the length of the roller 122b. Figure 3E , an example of a shape such as a triangle whose apex is a circle is shown in the plane perpendicular to the length of the roller 122 b , but the shape is not limited to this, and the cross-sectional shape can be selected according to the amount of pressure required for the plate-like body 11 , etc.

[0060] Figure 3F As shown, the pressing device 123 can be arranged so as to cover the outer surface of the roller 122b. Figure 3F The pressing device 123 shown can be arranged along the outer surface of the roller 122b. Figure 3F The pressing device 123 shown can be a plate body including a cavity between the roller 122b and the pressing device 123. Figure 3F The pressing device 123 shown can have a support or the like between the pressing device 123 and the roller 122 b.

[0061] Figure 3F The pressing device 123 shown can have a circular shape in which the lower blade 121b is partially missing in a cross section perpendicular to the length of the roller 122b. The circular shape can be a perfect circle or an ellipse. In addition, Figure 3F The pressing device 123 shown does not need to completely cover the outer surface of the roller 122b. For example, the section perpendicular to the length of the roller 122b can be a part of a circle, that is, an arc shape.

[0062] Figure 3F The pressing device 123 shown may be fixed to the outer surface of the roller 122b, may be fixed to a fixing jig (not shown) that fixes the lower blade 121b, or the like that fixes the lower blade 121b.

[0063] Figure 3C to Figure 3F The pressing device 123 shown shows an example of being arranged continuously along the length of the roller 122b, and can be used Figure 3B As explained above, the roller 122b is provided intermittently along the length of the roller 122b.

[0064] The material of the pressing device 123 is not particularly limited, and may be metal such as stainless steel, steel, or resin. The pressing device 123 may include both metal and resin. When the pressing device 123 is made of resin, it may be a foam containing bubbles inside.

[0065] The pressing device 123 can be constructed in a manner that allows the size of the outer diameter, etc. to be changed. Specifically, the pressing device 123 can be constructed in a manner that allows the size of the outer diameter, etc. to be changed, for example, by supplying one or more media selected from gas and liquid to the inside of the pressing device 123, or discharging them to the outside of the pressing device 123. In this case, the pressing device 123 can have a retractable outer peripheral portion; a media housing portion that covers the outer peripheral portion and can accommodate the media; and a pipe connected to the media housing portion. In addition, the pressing device 123 can further have an external container connected to the above-mentioned pipe for storing the media supplied by the media housing portion; a pump for transporting the media to the media housing portion, a valve provided on the above-mentioned pipe, etc.

[0066] In addition, the outer peripheral part is preferably configured to be repeatedly expandable and contractible, and therefore, resin, etc. are preferably used as the material. In addition, water and air, which are easily available and inexpensive, are preferably used as the medium.

[0067] The size-variable pressing device 123 can be configured to automatically supply and discharge the medium to the medium storage unit so that the pressing device 123 has a desired size. In this case, the pressing device 123 further includes a control device, preferably configured to control the operation of a pump, a valve, etc.

[0068] In addition, the size-adjustable pressing device 123 can supply and discharge the medium to the medium storage unit by manually operating a pump, etc. A part of the piping, an external container, a pump, etc. can be removed in a manner that does not hinder the operation of the lower unit 12b, etc.

[0069] The pressing device 123 may be formed integrally with the roller 122b, and may be configured to be detachable from the roller 122b by means of a screw or the like.

[0070] The size of the pressing device 123 is not particularly limited, and can be selected according to the distance between the rotating cutter 12 and the downstream conveying device 131, the material of the plate-like body 11, etc. For example, the size of the pressing device 123 can be selected in a manner that ensures that the cut surface 11A of the plate-like body 11 does not contact the downstream conveying device 131.

[0071] The cutting device 10 of this embodiment can further include arbitrary members.

[0072] (1-3) Control device, length measuring device

[0073] Figure 1 As shown, the cutting device 10 of this embodiment can further include a control device 14 that controls the rotation speed of the roller 122b of the lower unit 12b.

[0074] The control device 14 controls the rotation speed of the roller 122b of the lower unit 12b to adjust the timing of contact between the plate-like body 11 and the pressing device 123. Therefore, the cutting device 10 of this embodiment includes the control device 14, so that the timing of pressing the plate-like body 11 can be adjusted.

[0075] Here, an example is shown in which the control device 14 controls the rotation speed of the roller 122 b to adjust the timing of contact between the display plate 11 and the pressing device 123 . However, the method of adjusting the timing of contact between the display plate 11 and the pressing device 123 is not limited to this method.

[0076] For example, the timing at which the plate-like body 11 and the pressing device 123 come into contact with each other can be adjusted by shifting and adjusting the position of the pressing device 123 on the roller 122 b along the circumferential direction of the roller 122 b .

[0077] Furthermore, the timing of contact between the plate-like body 11 and the pressing device 123 may be adjusted by changing the size of the pressing device 123 .

[0078] For example, a plurality of pressing devices 123 of different sizes such as outer diameters can be prepared. In this case, the pressing devices 123 of different sizes are preferably configured to be detachable from the roller 122b. By selecting a pressing device 123 of an appropriate size to be attached to the roller 122b according to the specifications of the plate-like body 11, the timing of contact between the plate-like body 11 and the pressing device 123 can be adjusted.

[0079] Alternatively, a pressing device 123 having a changeable outer diameter can be attached to the roller 122b. Furthermore, the timing of the contact between the plate-like body 11 and the pressing device 123 can be adjusted by automatically or manually adjusting the size of the pressing device 123 according to the specification of the plate-like body 11.

[0080] The control device 14 can also control the rotation speed of the roller 122a of the upper unit 12a. For example, the control device 14 can control the rotation speed of the roller 122a of the upper unit 12a so that the plate-like body 11 can be cut to a desired length according to the length of the plate-like body 11 to be manufactured. In this case, the control device 14 can also control the rotation speed of the roller 122b of the lower unit 12b.

[0081] The cutting device 10 of this embodiment can include a length measuring device 15 for measuring the length of the plate-like object 11. The length measuring device 15 can measure the length of the plate-like object 11 being conveyed. Figure 1 In the figure, a configuration example of a contact-type length measuring device is shown as the length measuring device 15, but the configuration is not limited to this configuration, and a non-contact-type length measuring device may be used.

[0082] The control device 14 can control the rotation speed of the roller 122a of the upper unit 12a and the roller 122b of the lower unit 12b so that the plate-like body 11 can be cut into a desired length based on the length of the plate-like body 11 measured by the length measuring device 15.

[0083] The control device 14 can control the speed of the rollers 122a and 122b individually using the upper unit 12a and the lower unit 12b. In addition, the rollers 122a and 122b do not need to rotate at a constant speed, and can be variable in speed.

[0084] The control device 14 can include a CPU as a calculation processing unit for performing calculations necessary for control, RAM and ROM as main storage devices, auxiliary storage devices, input and output ports, and a display device as an output device. The CPU, main storage device, auxiliary storage device, input and output ports, and output device of the control device 14 can be connected to each other using a bus. The above components of the control device 14 do not need to be all housed in the same housing. For example, the auxiliary storage device and the display device can be provided outside. The auxiliary storage device is a storage device such as an SSD or an HDD.

[0085] In addition, CPU is the abbreviation of central processing unit, RAM is the abbreviation of random access memory, and ROM is the abbreviation of read-only memory. In addition, SSD is the abbreviation of solid state drive, and HDD is the abbreviation of hard disk drive.

[0086] As the input / output port, for example, there can be mentioned a wired or wireless port for exchanging detection data of the length measuring device 15, control amounts in a driving device (not shown) of the driving roller 122a or the roller 122b, and the like.

[0087] In addition, as the input / output port, a touch panel for selecting control conditions, a keyboard, a user interface such as an operation button, etc. can also be cited.

[0088] The control device 14 can be constituted by a personal computer (PC) etc. Therefore, the above-mentioned components of the control device 14 can be realized by the cooperation of software and hardware in an information processing device such as a personal computer, in which a CPU executes a pre-stored equation.

[0089] The control device 14 can control, in addition to the above-mentioned components, for example, the transport speed of the downstream transport device 131 and the like. Figure 1 In the example shown in FIG. 1 , the cutting device 1 includes one control device 14 , but the present invention is not limited to this form, and the cutting device 1 can be controlled by a plurality of control devices. In this case, it is preferable to configure the cutting device 1 so that data can be transmitted and received between the control devices.

[0090] (1-4) Downstream transport device

[0091] The cutting device 10 can include a downstream conveying device 131 at the downstream of the conveying path of the plate-like body 11 by the rotary blade 12. The plate-like body 11 cut by the rotary blade 12 can be conveyed to an arbitrary device or the like by the downstream conveying device 131.

[0092] The downstream conveying device 131 is not particularly limited as long as it is a device that supports and can convey the plate-like body 11. For example, one or more selected from a belt conveyor, a roller conveyor, etc. can be preferably used.

[0093] For example Figure 1 In the figure, an example using a roller conveyor is shown as the downstream transport device 131, but the present invention is not limited to this form, and a part or all of the downstream transport device 131 can also be a belt conveyor.

[0094] However, it is preferable that the downstream conveying device 131 includes a conveying roller 131a at least immediately after the rotary blade 12. In this case, it is preferable that the rotation direction of the conveying roller 131a be controllable by the control device 14 or the like described above.

[0095] A conveying roller 131a is provided immediately after the rotary cutter 12, and the conveying roller 131a is moved in a direction opposite to the conveying direction of the plate-like body 11. Figure 1 The conveying roller 131 a rotates in the direction of the arrow b indicated by the midpoint line, so that foreign matter adhering to the surface of the conveying roller 131 a can be dropped.

[0096] As described above, according to the cutting device 10 of the present embodiment, by providing the pressing device 123, it is possible to suppress the material of the plate-like body 11 from being attached to the downstream conveying device 131. However, when the plate-like body 11 is cut by the rotating cutter 12, the chips and the like may be scattered and attached to the conveying roller 131a disposed at the most upstream position in the conveying direction of the plate-like body 11 in the downstream conveying device 131. Therefore, by rotating the conveying roller 131a in a manner opposite to the conveying direction of the plate-like body 11, it is configured in a manner that foreign matter can be removed, thereby, in particular, it is possible to suppress the transfer of foreign matter from the conveying roller 131a to the bottom of the plate-like body 11.

[0097] In addition, the control device 14 can also make the conveying roller 131a move in the same direction as the conveying direction of the plate-like body 11, that is, Figure 1 In the above case, the control device 14 can reverse the rotation direction of the conveying roller 131a at any timing and control the conveying roller 131a to rotate in the direction of the arrow b shown by the dotted line.

[0098] (1-5) Foreign matter adhesion prevention device

[0099] As described above, when the plate-like body 11 is cut by the rotating cutter 12, the chips sometimes fly and adhere to the transport roller 131a of the downstream transport device 131. If foreign matter such as chips adheres to the surface of the transport roller 131a, the shape of the foreign matter such as chips is transferred to the bottom of the transported plate-like body 11, which may cause defective products that do not meet the specifications.

[0100] Therefore, the cutting device 10 of this embodiment can have a foreign matter adhesion prevention device 16 between the rotating tool 12 and the downstream conveying device 131. The structure of the foreign matter adhesion prevention device 16 is not particularly limited, and the foreign matter adhesion prevention device 16 can be any device that can prevent foreign matter such as chips generated when the plate-like body 11 is cut by the rotating tool 12 from scattering and adhering in the downstream conveying device 131.

[0101] The foreign matter adhesion prevention device 16 may be an obstacle formed by an invisible object or a visible object. By setting an obstacle between the rotary cutter 12 and the downstream conveyor 131 , foreign matter such as chips generated by the rotary cutter 12 can be prevented from scattering and adhering in the downstream conveyor 131 .

[0102] As the foreign matter adhesion prevention device 16, there can be cited a device that forms an obstacle formed by gas as an invisible object such as an air curtain (air curtain device); a plate-like or sheet-like obstacle, and a device that forms an obstacle formed by one or more tangible objects selected from sponges, brushes, and bristles.

[0103] (1-6) Upstream transport device

[0104] The cutting device 10 of this embodiment can include an upstream transport device 132 for transporting the plate-like body 11 as the object to be cut toward the rotary blade 12. As the upstream transport device 132, Figure 1 In the figure, an example of a roller conveyor is shown, and any means is not particularly limited as long as it can support and transport the plate-like body 11. As the upstream transport device 132, for example, one or more selected from a belt conveyor, a roller conveyor, etc. can be preferably used.

[0105] (1-7) Others

[0106] The cutting device 10 of this embodiment may include an upper surface air supply device (not shown) for spraying air onto the upper surface of the plate-like body 11 to remove the foreign matter in order to further remove the foreign matter adhering to the upper surface of the plate-like body 11 being transported.

[0107] Furthermore, the cutting device 10 of the present embodiment may include a scraper or the like provided so as to come into contact with the surface of the rotating conveying roller 131 a in order to remove foreign matter adhering to the conveying roller 131 a .

[0108] (2) Regarding plate-like bodies

[0109] The plate-like body 11 of the object to be cut by the cutting device 10 of this embodiment is not particularly limited, as long as it is a plate-like object to be cut. Therefore, even if it is a final product or a semi-finished product in the middle of manufacturing / processing, it can be applied to the cutting device 10 of this embodiment as the plate-like body 11.

[0110] However, in particular, semi-finished products are often cut into arbitrary sizes while being transported, and do not have sufficient strength and are prone to bending. Therefore, when the plate-like body 11 is a semi-finished product, the cutting device 10 of this embodiment shows a particularly high effect. Therefore, the plate-like body 11 is preferably a semi-finished product.

[0111] In addition, when the plate-like body 11 is a semi-finished product, the semi-finished product may be a molded product selected from one or more of ceramics and resins, etc., without undergoing at least one of drying and firing, or without undergoing a reaction such as curing, such as an uncured gypsum board, a green sheet, etc. The so-called reaction such as curing not proceeding includes the case where the reaction such as curing is partially proceeding and the case where the reaction is not proceeding at all.

[0112] Furthermore, examples of final products of one or more molded articles selected from ceramics and resins listed as the semi-finished products include building materials such as gypsum boards, members for electronic parts, structural materials, and the like.

[0113] Examples of the gypsum board include, for example, glass mat gypsum board, glass fiber nonwoven fabric gypsum-containing board, gypsum board specified in JIS A 6901 (2014), gypsum board lighter or heavier than the gypsum board specified in JIS A 6901 (2014) (hereinafter, the gypsum board specified in the above JIS and the gypsum board lighter or heavier than the gypsum board specified in JIS are collectively referred to as "gypsum board"), slag gypsum board, and other gypsum boards.

[0114] The glass mat gypsum board is, for example, a gypsum board whose surface is covered with a glass mat.

[0115] The glass fiber nonwoven fabric added gypsum containing board is, for example, a gypsum board having no glass fiber nonwoven fabric (glass paper) embedded on the surface side.

[0116] In addition, the gypsum board is, for example, a gypsum board whose surface is covered with base paper for a board.

[0117] Other gypsum boards are gypsum boards that are not classified into any of the above-mentioned gypsum boards, and examples thereof include gypsum boards that do not have surface paper as a covering material.

[0118] The final product may be the plate-like body 11 as a cut object as described above.

[0119] The thickness of the plate-like body 11 is not particularly limited and can be arbitrarily selected according to the cutting ability of the rotary blade 12 and the like.

[0120] [Plate-shaped body manufacturing device, gypsum board manufacturing device]

[0121] Next, a configuration example of a plate-like body manufacturing apparatus and a gypsum board manufacturing apparatus according to the present embodiment will be described.

[0122] The manufacturing apparatus of the plate-like body of the present embodiment can include the above-mentioned cutting apparatus.

[0123] In addition, as the plate-like body, for example, a gypsum board can also be manufactured. In this case, the manufacturing device of the plate-like body can also become a gypsum board manufacturing device. Therefore, the gypsum board manufacturing device of this embodiment can also be equipped with the cutting device described above.

[0124] Regarding the gypsum board manufacturing device of this embodiment and the type of gypsum board manufactured by the gypsum board manufacturing method described later, as mentioned above, any one selected from glass mat gypsum board, glass fiber non-woven fabric added gypsum containing board, gypsum board, slag gypsum board, other gypsum boards, etc. can be cited.

[0125] The plate-like body manufacturing apparatus and the gypsum board manufacturing apparatus of the present embodiment can include various devices and means necessary for manufacturing the plate-like body in addition to the above-mentioned cutting device.

[0126] For example, when it is necessary to mix raw materials, the plate-like body manufacturing device and the gypsum board manufacturing device of this embodiment can have a mixing means (mixer) for mixing raw materials. In addition, the plate-like body manufacturing device and the gypsum board manufacturing device of this embodiment can have a molding device for molding and processing raw materials, raw material mixtures prepared by the above-mentioned mixing means, raw material slurry, etc. into desired shapes and sizes.

[0127] Below, use Figure 4 As a configuration example of a plate-like body manufacturing apparatus and a gypsum board manufacturing apparatus according to the present embodiment, the configuration of the apparatus is described taking the case of manufacturing a plate-like body and a gypsum board as a gypsum board as an example.

[0128] Figure 4 The gypsum board manufacturing apparatus 40 shown has, in addition to the above-mentioned cutting device 10, a mixer 42 as a mixing means for mixing raw materials, and a molding machine 48 for molding the gypsum slurry prepared by the mixer 42. The configuration example of the apparatus will be described in detail below.

[0129] (1) Mixer

[0130] The mixer 42 can be arranged at a predetermined position related to the conveying line of the first board base paper 411, the second board base paper 412, etc., which are the covering materials, for example, above or in the horizontal direction of the conveying line. In addition, calcined gypsum, which is the raw material of gypsum slurry, water, various additives and bubbles as needed can be mixed in a single mixer 42 to prepare gypsum slurry.

[0131] Here, calcined gypsum is also called calcium sulfate 1 / 2 hydrate, which is an inorganic composition with water hardness. As calcined gypsum, a monomer of β-type calcined gypsum or α-type calcined gypsum, or a mixture of the two can be used. β-type calcined gypsum is any monomer of natural gypsum, by-product gypsum, flue gas desulfurization gypsum, recycled gypsum from waste gypsum boards, etc., or a gypsum mixed with any combination thereof, and is obtained by calcining in the atmosphere. α-type calcined gypsum is any monomer of natural gypsum, by-product gypsum, flue gas desulfurization gypsum, recycled gypsum from waste gypsum boards, etc., or a gypsum mixed with any combination thereof, and is obtained by calcining in water (including steam).

[0132] When manufacturing gypsum board, the calcined gypsum used as the raw material preferably contains β-type calcined gypsum, and the main component of the calcined gypsum used as the raw material of the gypsum board is more preferably β-type calcined gypsum. In addition, the main component of the calcined gypsum used as the raw material of the gypsum board is β-type calcined gypsum, which means that the β-type calcined gypsum occupies more than 50% of the calcined gypsum used as the raw material of the gypsum board in terms of mass ratio. When manufacturing gypsum board, the calcined gypsum used as the raw material may be composed only of β-type calcined gypsum.

[0133] When producing α-type calcined gypsum, it is necessary to pressurize and calcine dihydrate gypsum such as natural gypsum in water or steam using an autoclave. In contrast, β-type calcined gypsum can be produced by calcining dihydrate gypsum such as natural gypsum in the atmosphere at normal pressure, and β-type calcined gypsum can be produced with better productivity than α-type calcined gypsum.

[0134] As additives, for example, there can be mentioned one or more selected from among starch, polyvinyl alcohol and other adhesion improvers for improving the adhesion between gypsum solidified body (product of solidifying gypsum slurry) and board base paper, inorganic fibers such as glass fiber, lightweight aggregates, refractory materials such as vermiculite, retarders, setting accelerators, water reducers, foaming agents such as sodium alkyl sulfate, alkyl ether sulfate, sodium alkylbenzene sulfonate, polyoxyethylene alkyl sulfate, foaming agents such as sulfosuccinate type surfactants, water repellents such as silicone and paraffin, organic carboxylic acids, organic carboxylates, and the like.

[0135] Alternatively, the calcined gypsum and a part of additives, for example, solid additives, may be mixed and stirred in advance to prepare a gypsum composition as a mixture, and then supplied to the mixer 42 .

[0136] In addition, bubbles can be added to one or more selected locations of the gypsum slurry dispensing ports 421, 422, and 423, and the amount of bubbles added can be adjusted to prepare gypsum slurry of any density. For example, bubbles can be added to the dispensing ports 421 and 422 without adding bubbles or in small amounts to prepare the first gypsum slurry 43 of high density. Furthermore, bubbles can be added to the dispensing port 423 more than the first gypsum slurry to prepare the second gypsum slurry 44 of low density.

[0137] Then, the obtained first gypsum slurry 43 is supplied onto the first board paper 411 and the second board paper 412 through the delivery pipes 451 and 452 on the upstream side of the roll coater 46 in the conveying direction of the board paper.

[0138] The high-density first gypsum slurry 43 supplied to the first board base paper 411 and the second board base paper 412 reaches the extension part of the roll coater 46 and is extended in the extension part. In addition, the roll coater 46 can have a coating roller 461, a receiving roller 462, and a slag removal roller 463. And when each board base paper passes between the coating roller 461 and the receiving roller 462, the first gypsum slurry 43 can be extended on the board base paper.

[0139] In this way, a thin layer of the first gypsum slurry 43 is formed on the first board base paper 411. Then, the first board base paper 411 is bent and its two side edge portions extend upward and then extend inward. A thin layer of the first gypsum slurry 43 is also formed on the second board base paper 412, but unlike the first board base paper 411, the second board base paper 412 is not bent. In addition, it is not limited to the method of applying the first gypsum slurry 43 to both the first board base paper 411 and the second board base paper 412. For example, the first gypsum slurry 43 can be applied only to the first board base paper 411 or the second board base paper 412. In addition, the first gypsum slurry 43 can also be arranged only on the side end portion that is the end portion in the width direction of the first board base paper 411.

[0140] The first board paper 411 is conveyed as it is, and the second board paper 412 is turned in the conveying line direction of the first board paper 411 by the turning roller 47 .

[0141] (2) Molding machine

[0142] The first board base paper 411 and the second board base paper 412 transported in the gypsum board manufacturing device 40 are made to reach the molding machine 48. Here, the second gypsum slurry 44 is supplied from the mixer 42 through the pipeline 453 between the thin layers of the first gypsum slurry 43 formed on the first board base paper 411 and the second board base paper 412. Therefore, a continuous laminated body in which a layer formed of the first gypsum slurry 43, a layer formed of the second gypsum slurry 44, and a layer formed of the first gypsum slurry 43 are laminated can be formed between the first board base paper 411 and the second board base paper 412.

[0143] The present invention is not limited to the method of using the high-density first gypsum slurry 43 and the low-density second gypsum slurry 44, and for example, a method of preparing gypsum slurry of one density and supplying it onto the base paper for the board may be used.

[0144] Specifically, for example, gypsum slurry of a predetermined density is supplied and piled up on the first board base paper 411 that is continuously transported. Moreover, the two ends in the width direction of the first board base paper 411 are folded in along predetermined score lines, and then extend inward after extending along the upper side, so that the stack of gypsum slurry can be partially rolled in. Thereafter, the second board base paper 412 that is transported at the same speed can be overlapped on the stack of gypsum slurry partially rolled in by the first board base paper 411. Next, the molding machine 48 that determines the thickness and width of the gypsum board is passed through and molded. The above steps can also be used to mold the gypsum board. In this case, a layer formed of gypsum slurry of a certain density is formed between the first board base paper 411 and the second board base paper 412.

[0145] In this manner, the molding process of molding the gypsum slurry can be performed in the molding machine 48 of the gypsum board manufacturing apparatus 40 , thereby manufacturing the gypsum slurry molded body 49 .

[0146] (3) Cutting device

[0147] The gypsum board manufacturing apparatus 40 of the present embodiment can include a cutting device 10 on the downstream side of the molding machine 48 .

[0148] One or more cutting devices 10 can be provided as needed. For example, a first cutting device (rough cutting device) for rough cutting can be provided for the purpose of placing the manufactured gypsum board in a dryer. In addition, a second cutting device for cutting can be provided to match the size of the final product.

[0149] The cutting device 10 has been described above, and its description is omitted here.

[0150] (4) Dryer

[0151] The gypsum board manufacturing apparatus 40 of the present embodiment can further include a dryer or the like, for example, on the downstream side of the molding machine 48 as necessary.

[0152] In the dryer, the residual water content in the gypsum slurry molded body can be reduced.

[0153] According to the manufacturing apparatus of the plate-like body of the present embodiment, the manufacturing apparatus of the gypsum board uses the aforementioned cutting device, so even if the vicinity of the cut surface 11A of the plate-like body is bent, it is possible to prevent the plate-like body 11 from contacting the downstream conveying device 131. Therefore, it is possible to prevent the material of the plate-like body 11 from adhering to the downstream conveying device 131 as a conveying device, thereby preventing the plate-like body 11 from being damaged.

[0154] [Method for manufacturing gypsum board]

[0155] The manufacturing method of the gypsum board of this embodiment can include the cutting step of cutting the molded body of the gypsum slurry by the above-mentioned cutting device.

[0156] The method for producing a gypsum board according to the present embodiment may include, for example, the following gypsum slurry preparation step, molding step, cutting step, and curing step.

[0157] In the gypsum slurry preparation step, calcined gypsum, which is a raw material of the gypsum slurry, water, and, if necessary, various additives and foam are kneaded to prepare the gypsum slurry.

[0158] In the molding step, the gypsum slurry can be molded into a plate shape.

[0159] In the cutting step, the molded body of the gypsum slurry can be cut by the aforementioned cutting device.

[0160] In the curing step, the plate-shaped molded body obtained in the molding step can be cured.

[0161] Each step will be described by taking as an example a case where the gypsum board to be manufactured is a gypsum board.

[0162] (Gypsum slurry preparation process)

[0163] In the gypsum slurry preparation step, the calcined gypsum, water, various additives and bubbles as needed are mixed to prepare the gypsum slurry.

[0164] For example, as described in the gypsum board manufacturing apparatus, these raw material components can be kneaded by a mixer, etc. to prepare gypsum slurry. In addition, the raw materials of gypsum slurry have been described, and the description is omitted here.

[0165] (Molding process)

[0166] In the forming step, the gypsum slurry obtained in the gypsum slurry preparation step can be formed into a plate shape. When the gypsum board to be manufactured is a gypsum board, in the forming step, the gypsum slurry is supplied between two sheets of board base paper and can be formed into a plate shape.

[0167] For example, using a gypsum board manufacturing apparatus, as described above, a high-density first gypsum slurry 43 and a low-density second gypsum slurry 44 are formed in advance in a gypsum slurry molding process. In addition, in a molding process, a continuous laminated body in which a layer of a high-density first gypsum slurry 43, a layer of a low-density second gypsum slurry 44, and a layer of a high-density first gypsum slurry 43 are sequentially laminated can be formed between the first board base paper 411 and the second board base paper 412. Next, a molding machine 48 that determines the thickness of the gypsum board can be passed to form a plate-shaped gypsum slurry molded body.

[0168] However, the present invention is not limited to the above-described embodiment, and in the molding step, gypsum slurry having a desired density may be supplied to a board paper room and molded into a board shape by a molding machine.

[0169] (Cutting process)

[0170] In the cutting step, the molded body of the gypsum slurry can be cut using the aforementioned cutting device.

[0171] In addition, after the gypsum slurry molded body is formed by the molding process, the gypsum slurry gradually solidifies. Therefore, the cutting process can be implemented between the implementation of the curing process described later, for example, or after the curing process is completed. However, it is preferred that the cutting process is implemented after the curing process is performed to the extent that the gypsum slurry molded body can be cut.

[0172] The cutting step can also be performed multiple times. Therefore, the manufacturing method of the gypsum board of the present embodiment can have a first cutting step, such as a rough cutting step. The first cutting step can cut the gypsum slurry molded body into a desired size according to, for example, the size of a dryer used in the drying step described later.

[0173] In addition, the second cutting step can be performed, for example, after the drying step, and the product can be cut into a desired product size.

[0174] (Curing process)

[0175] After the molding step, a curing step may be performed. The curing step is a step of curing the gypsum slurry molded body obtained in the molding step.

[0176] The curing process can be implemented by hydrating the calcined gypsum (hemihydrated gypsum) in the gypsum slurry to produce needle-shaped crystals of dihydrated gypsum, which are condensed and solidified. Therefore, the calcined gypsum added to the gypsum slurry reacts with water in the molded body formed by the molding process, and the hydration reaction of the calcined gypsum proceeds, thereby implementing the curing process.

[0177] Moreover, the manufacturing method of a gypsum board can further have an arbitrary process. Specifically, for example, it can have the following drying process.

[0178] (Drying process)

[0179] In the drying process, the gypsum slurry molded body can be dried. In the drying process, the remaining water contained in the gypsum slurry molded body can be dried. In addition, in the drying process, the molded body after the curing process is completed can be supplied. The drying process can be implemented by using a dryer to forcefully dry the molded body.

[0180] The method of forcibly drying the molded body by a dryer is not particularly limited. For example, a dryer can be set on the transportation path of the molded body, and the molded body passes through the dryer, so that the molded body can be dried continuously. In addition, the molded body can be moved into the dryer and dried in batches.

[0181] According to the manufacturing method of the gypsum board of this embodiment, the above-mentioned cutting device is used in the cutting step, so even if the plate-like body is bent near the cut surface 11A, it is possible to prevent the plate-like body 11 from contacting the downstream conveying device 131. Therefore, it is possible to prevent the material of the plate-like body 11 from adhering to the downstream conveying device 131 as a conveying device and damaging the plate-like body 11.

[0182] [Note]

[0183] (1) A cutting device according to one aspect of the present disclosure is a cutting device for cutting a plate-like object being transported, and includes:

[0184] a rotary cutter including a lower unit disposed below the plate-like body and having a roller and a lower blade mounted on the roller, and

[0185] A pressing device is provided in the lower unit and presses the plate-like body.

[0186] (2) In the above (1), the pressing device may be arranged at a position in contact with the plate-like body cut by the lower blade when the roller is rotated, and the portion in contact with the plate-like body may be a curved surface.

[0187] (3) In the above (1) or (2), the above-mentioned pressing device may have a columnar shape.

[0188] (4) In any one of (1) to (3), the pressing device may be provided continuously along the length of the roller.

[0189] (5) In any one of (1) to (4), a control device for controlling the rotation speed of the roller may be further provided. (6) A plate-like object manufacturing device according to one aspect of the present disclosure includes the cutting device according to any one of (1) to (5).

[0190] (7) A gypsum board manufacturing device according to one aspect of the present disclosure includes the cutting device according to any one of (1) to (5).

[0191] (8) A method for producing a gypsum board according to one aspect of the present disclosure includes a cutting step of cutting a molded body of gypsum slurry using the cutting device according to any one of (1) to (5).

[0192] The above describes the cutting device, the plate-like body manufacturing device, the gypsum board manufacturing device, and the gypsum board manufacturing method by means of the embodiments, but the present invention is not limited to the above embodiments, etc. Various modifications and changes are possible within the scope of the gist of the present invention described in the claims.

[0193] This application claims the priority based on Japanese Patent Application No. 2022-155885 filed in the Japan Patent Office on September 29, 2022, and all the contents of Japanese Patent Application No. 2022-155885 are incorporated herein by reference.

[0194] Explanation of symbols

[0195] 10 Cutting device

[0196] 11 plate-shaped body

[0197] 11A Cut surface

[0198] 12 Rotating cutter

[0199] A, B arrows

[0200] 12a Upper unit

[0201] 121a Upper Edge

[0202] 122a Roller

[0203] 12b Lower unit

[0204] 121b Lower Edge

[0205] 122b Roller

[0206] 123, 123A, 123B pressing device

[0207] 131 Downstream transport device

[0208] 131a Transport roller

[0209] a, b arrows

[0210] 14 Control Devices

[0211] 15 Length measuring device

[0212] 16 Foreign matter adhesion prevention device

[0213] 40 Gypsum board manufacturing equipment

[0214] 411 Base paper for the first board

[0215] 412 Base paper for the second board

[0216] 42 Mixer

[0217] 421, 422, 423 points

[0218] 43 No. 1 gypsum slurry

[0219] 44 No. 2 gypsum slurry

[0220] 451, 452 delivery pipe

[0221] 453 Pipeline

[0222] 46 Roller Coater

[0223] 461 Coating Roller

[0224] 462 receiving roller

[0225] 463 Deslagging Roller

[0226] 47 Steering Roller

[0227] 48 Forming Machine

[0228] 49 Gypsum slurry molding

Claims

1. A cutting device for cutting a plate-like object to be transported, comprising: a rotary cutter including a lower unit disposed below the plate-like body, the lower unit having a roller and a lower blade mounted on the roller, and A pressing device is provided in the lower unit and presses the plate-like body.

2. The cutting device according to claim 1, The pressing device is disposed at a position in contact with the plate-like body cut by the lower blade when the roller is rotated, and a portion in contact with the plate-like body forms a curved surface.

3. The cutting device according to claim 1 or 2, The pressing device has a columnar shape.

4. The cutting device according to claim 1 or 2, The pressing device is arranged continuously along the length of the roller. 5 . The cutting device according to claim 1 , further comprising a control device for controlling a rotation speed of the roller. 6 . A device for producing a plate-like object, comprising the cutting device according to claim 1 .

7. A gypsum board manufacturing device comprising the cutting device according to claim 1 or 2. 8 . A method for producing a gypsum board, comprising a cutting step of cutting a molded body of gypsum slurry by the cutting device according to claim 1 or 2.

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