阅读说明：本技术 碎纸机及薄片制造装置 (Shredder and sheet manufacturing apparatus ) 是由 山田健太郎 于 2019-07-24 设计创作，主要内容包括：本发明提供一种能够进一步确保供给薄片的供给部的设计自由度的碎纸机及薄片制造装置。该碎纸机的特征在于,具备：供给部,其具有被供给薄片的供给口；裁断部,其将被供给至所述供给部的所述薄片裁断,所述裁断部具有：旋转刃,其围绕第一轴进行旋转；循环移动刃,其在进行循环移动的同时,于其与所述旋转刃之间将所述薄片裁断,所述循环移动刃具有输送部,所述输送部将所述薄片从所述供给部输送至所述旋转刃。(The invention provides a shredder and a sheet manufacturing device, which can further ensure the design freedom of a feeding part for feeding sheets. The shredder is characterized in that: a supply unit having a supply port through which a sheet is supplied; a cutting section that cuts the sheet supplied to the supply section, the cutting section including: a rotary blade that rotates about a first axis; and a circulating moving blade that cuts the sheet between the rotating blade and the circulating moving blade while circulating, wherein the circulating moving blade has a conveying portion that conveys the sheet from the supply portion to the rotating blade.)

1. A paper shredder is characterized by comprising:

a supply unit having a supply port through which a sheet is supplied;

a cutting section that cuts the sheet supplied to the supply section,

the cutting section includes:

a rotary blade that rotates about a first axis;

a circulating moving blade for cutting the sheet between the rotating blade and the sheet while circulating,

the circulating moving blade has a conveying portion that conveys the sheet from the supply portion to the rotary blade.

2. The paper shredder according to claim 1, wherein,

the circulating blade includes a connecting body that connects the plurality of small pieces having a blade that cuts the sheet between the circulating blade and the rotary blade to each other so as to be rotatable.

3. The paper shredder according to claim 2, wherein,

the small pieces are linearly connected to the conveying unit.

4. The paper shredder according to claim 2, wherein,

the coupling body is in a state in which the small pieces are wound along the circumferential direction of the rotary blade.

5. The paper shredder according to claim 2, wherein,

the connecting body is an endless annular body.

6. The paper shredder according to claim 1, wherein,

the supply port is disposed so as to face the conveying unit side.

7. The paper shredder according to claim 1, wherein,

the supply port is disposed so as to face the rotary blade side.

8. The paper shredder according to claim 1, wherein,

the rotary blade includes a first rotary blade and a second rotary blade having a smaller diameter than the first rotary blade, and the second rotary blade is disk-shaped and disposed concentrically with the first rotary blade.

9. The paper shredder according to claim 8, wherein,

the rotary blade includes a plurality of first rotary blades and a plurality of second rotary blades,

the first rotary blade and the second rotary blade are alternately arranged along the first axial direction.

10. The paper shredder according to claim 1, wherein,

the cutting section has a driving section for rotating the rotary blade around the first axis,

the rotary blade is engaged with the cyclically-moving blade, and the cyclically-moving blade cyclically moves in accordance with the rotation of the rotary blade about the first axis.

11. A sheet manufacturing apparatus is characterized in that,

the paper shredder of any one of claims 1 to 10,

the sheet manufacturing apparatus manufactures a new sheet using a sheet cut by the shredder as a raw material.

Technical Field

The invention relates to a paper shredder and a slice manufacturing device.

Background

Conventionally, there is known a shredder configured to shred a material to be shredded such as a sheet (see, for example, patent document 1). The shredder described in patent document 1 has a plurality of rotating blades in a disk shape. Further, by rotating the rotary blades, the object to be shredded can be shredded between the rotary blades.

The shredder described in patent document 1 includes a pair of guide plates as a feeding unit for feeding the shredded material toward the rotary blade. The guide plates are disposed to face each other with a space therebetween. The object to be shredded can pass between a pair of guide plates and move toward the rotary blade, and then be shredded by the rotary blade.

In the shredder described in patent document 1, since the pair of guide plates has a function of guiding the object to be shredded to the rotary blade, it is necessary to bring each guide plate as close as possible to the rotary blade. Therefore, design conditions such as the distance between the guide plates and the arrangement position of the guide plates are limited.

Patent document 1: japanese patent laid-open publication No. 2007-268335

Disclosure of Invention

The present invention has been made to solve the above problems, and can be realized as the following aspect.

The shredder of the invention is characterized in that: a supply unit having a supply port through which a sheet is supplied; a cutting section that cuts the sheet supplied to the supply section, the cutting section including: a rotary blade that rotates about a first axis; and a circulating moving blade that cuts the sheet between the rotating blade and the circulating moving blade while circulating, wherein the circulating moving blade has a conveying portion that conveys the sheet from the supply portion to the rotating blade.

The sheet manufacturing apparatus of the present invention is characterized by including the shredder of the present invention, and manufacturing a new sheet using a sheet cut by the shredder as a raw material.

Drawings

Fig. 1 is a schematic side view showing a first embodiment of a sheet manufacturing apparatus of the present invention.

Fig. 2 is a schematic side view showing a shredder according to the present invention provided in the sheet manufacturing apparatus shown in fig. 1.

Fig. 3 is a schematic side view showing a modified example of the shredder according to the present invention provided in the sheet manufacturing apparatus shown in fig. 1.

Fig. 4 is a perspective view showing a main part of the shredder shown in fig. 2 and 3.

Fig. 5 is a view showing a positional relationship between the rotary blade and the circularly moving blade in fig. 4.

Fig. 6 is a view showing a positional relationship between the rotary blade and the circularly moving blade in fig. 4.

Fig. 7 is a diagram showing a positional relationship between the rotary blade and the circular moving blade in the shredder according to the second embodiment of the present invention.

Fig. 8 is a schematic side view showing a third embodiment of the shredder of the present invention.

Detailed Description

Hereinafter, a shredder and a sheet manufacturing apparatus according to the present invention will be described in detail based on preferred embodiments shown in the drawings.

First embodiment

Fig. 1 is a schematic side view showing a first embodiment of a sheet manufacturing apparatus of the present invention. Fig. 2 is a schematic side view showing a shredder according to the present invention provided in the sheet manufacturing apparatus shown in fig. 1. Fig. 3 is a schematic side view showing a modified example of the shredder according to the present invention provided in the sheet manufacturing apparatus shown in fig. 1. Fig. 4 is a perspective view showing a main part of the shredder shown in fig. 2 and 3. Fig. 5 and 6 are views showing the positional relationship between the rotary blade and the circular moving blade in fig. 4. In addition, hereinafter, for convenience of explanation, three axes orthogonal to each other are referred to as an x axis, a y axis, and a z axis as shown in fig. 1. The xy plane including the x axis and the y axis is horizontal, and the z axis is vertical. The direction in which the arrow mark of each axis is directed is referred to as "positive (+)" and the opposite direction is referred to as "negative (-)". Note that the upper side in fig. 1 to 6 (the same applies to fig. 7 and 8) may be referred to as "upper" or "upper", and the lower side may be referred to as "lower" or "lower".

As shown in fig. 1, the sheet manufacturing apparatus 100 includes: a shredder 1 having a feeding section 3 and a cutting section 4, a defibering section 13, a sifting section 14, a first sheet forming section 15, a subdividing section 16, a mixing section 17, a detaching section 18, a second sheet forming section 19, a sheet forming section 20, a cutting section 21, a stacking section 22, and a collecting section 27. The sheet manufacturing apparatus 100 includes a humidifying unit 231, a humidifying unit 232, a humidifying unit 233, a humidifying unit 234, a humidifying unit 235, and a humidifying unit 236. Further, the sheet manufacturing apparatus 100 includes a blower 261, a blower 262, and a blower 263.

Each part of the sheet manufacturing apparatus 100 is electrically connected to the control unit 28. The operations of these respective parts are controlled by the control unit 28. The control Unit 28 includes a CPU (Central Processing Unit) 281 and a storage Unit 282. The CPU281 can execute various determinations, various commands, and the like, for example. The storage unit 282 stores various programs such as a program for manufacturing the sheet S. The control unit 28 may be incorporated in the sheet manufacturing apparatus 100, or may be provided in an external device such as an external computer. Further, the external device may communicate with the sheet manufacturing apparatus 100 via a cable or the like, wirelessly communicate with the sheet manufacturing apparatus 100, connect with the sheet manufacturing apparatus 100 via a network such as the internet, or the like, for example. Note that, for example, the CPU281 and the storage unit 282 may be integrated into one unit, or the CPU281 may be incorporated in the sheet manufacturing apparatus 100 and the storage unit 282 may be provided in an external device such as an external computer, or the storage unit 282 may be incorporated in the sheet manufacturing apparatus 100 and the CPU281 may be provided in an external device such as an external computer.

In the sheet manufacturing apparatus 100, the raw material supplying step, the cutting step, the defibering step, the screening step, the first web forming step, the dividing step, the mixing step, the disassembling step, the second web forming step, the sheet forming step, and the cutting step are performed in this order.

The structure of each part will be explained below.

The supply section 3 is a section to which the material M1 is supplied as a sheet and which performs a material supply step of supplying the material M1 to the cutting section 4. In addition, the detailed structure of the supply portion 3 will be described below.

As the raw material M1, a sheet-like material containing cellulose fibers was used. The cellulose fiber is a material that is a compound, mainly composed of cellulose (cellulose in a narrow sense) and is in a fibrous state, and may be a material containing hemicellulose or lignin in addition to cellulose (cellulose in a narrow sense). The material M1 may be woven fabric, nonwoven fabric, or the like, and may be in any form. The raw material M1 may be, for example, recycled paper produced by defibering waste paper or YUPO paper (registered trademark) that is synthetic paper, or may not be recycled paper. In the present embodiment, the raw material M1 is used or unnecessary waste paper.

The cutting section 4 is a portion for performing a cutting step of cutting the material M1 supplied from the supply section 3 in a gas such as air. In the cutting section 4, cutting can be referred to as "coarse crushing" in relation to a defibering step in the next step. The material M1 is cut into coarse pieces M2 by the cutting section 4.

As shown in fig. 2 and 3, the cutting section 4 has a chute 41 for temporarily collecting the coarse chips M2. The chute 41 has a shape such as a funnel shape suitable for collecting the coarse chips M2. The detailed structure of cutting section 4 will be described later.

A humidifying unit 231 is disposed above the chute 41. The humidifying unit 231 humidifies the coarse chips M2 in the chute 41. The humidifying unit 231 is constituted by, for example, a vaporizing humidifier having a filter containing moisture, and supplies humidified air with increased humidity to the coarse chips M2 by passing the air through the filter. By supplying the humidified air to the coarse chips M2, the coarse chips M2 can be prevented from being attached to the chute 41 and the like by static electricity.

The chute 41 is connected to the fiber splitting unit 13 via a pipe 241. The coarse chips M2 collected in the chute 41 are conveyed through the pipe 241 into the defibration section 13.

The defibering unit 13 is a part that performs a defibering process of defibering the coarse chips M2 in a gas, that is, in a dry manner. By the defibering process in the defibering unit 13, a defibered product M3 can be generated from the coarse pieces M2. Here, "to perform defibration" means to separate the coarse pieces M2, which are formed by bonding a plurality of fibers, into one fiber. Then, the disassembled material becomes a defibrinated material M3. The shape of the defibrinated material M3 is a linear or ribbon shape. The defibrinates M3 may be entangled with each other to form a block, that is, a so-called "lump".

For example, in the present embodiment, the defibration section 13 is constituted by an impeller grinder having an impeller that rotates at a high speed and a bush located on the outer periphery of the impeller. The coarse chips M2 flowing into the defibering section 13 are sandwiched between the impeller and the bushing and are thereby defibered.

The defibering unit 13 is configured to generate a flow of air, i.e., an air flow, from the shredder 1 toward the screening unit 14 by rotation of the impeller. Thereby, the coarse chips M2 can be sucked from the tube 241 into the defibration section 13. After the defibering process, the defibered product M3 can be fed to the screening unit 14 through the pipe 242.

A blower 261 is provided midway in the pipe 242. The blower 261 is an airflow generating device that generates an airflow toward the sieving section 14. This facilitates the conveyance of the defibrination M3 to the screening section 14.

The screening section 14 is a section for performing a screening process of screening the defibrated product M3 according to the length and size of the fiber. In the screening section 14, the defibrinated product M3 was screened into a first screening product M4-1 and a second screening product M4-2 that was larger than the first screening product M4-1. The first screen M4-1 was a screen of a size suitable for the subsequent production of the sheet S. The average length is preferably 1 μm or more and 30 μm or less. On the other hand, the second screen M4-2 contained, for example, a substance that was not sufficiently defibered or a substance that was formed by excessively aggregating defibered fibers.

The screening section 14 includes a roller section 141 and a housing section 142 that houses the roller section 141.

The drum portion 141 is a screen formed of a cylindrical mesh body and rotating around its central axis. The defibered material M3 flows into the drum part 141. Then, the drum portion 141 is rotated, and the defibrinated material M3 smaller than the mesh size of the net is screened as the first screened material M4-1, and the defibrinated material M3 having a size not smaller than the mesh size of the net is screened as the second screened material M4-2.

The first screen M4-1 falls from the drum 141.

On the other hand, the second screen material M4-2 is fed into the pipe 243 connected to the drum 141. The pipe 243 is connected to the pipe 241 on the side opposite to the drum part 141, that is, on the downstream side. The second screen M4-2 passed through the pipe 243 is merged with the coarse chips M2 in the pipe 241 and flows into the defibration section 13 together with the coarse chips M2. Thereby, the second screen M4-2 is returned to the defibration section 13 and subjected to the defibration process together with the coarse chips M2.

Further, the first screen M4-1 from the drum section 141 fell while being dispersed in the gas, and fell toward the first web forming section 15 located below the drum section 141. The first web forming portion 15 is a portion where the first web forming process of forming the first web M5 from the first screen M4-1 is performed. The first web-forming portion 15 has a mesh belt 151, three tension rollers 152, and a suction portion 153.

The mesh belt 151 is an endless belt, and the first screen M4-1 is stacked thereon. The mesh belt 151 is wound around three tension rollers 152. Further, by the rotational drive of the tension roller 152, the first screen M4-1 on the mesh belt 151 is conveyed to the downstream side.

The first screen M4-1 was larger than the mesh of the mesh belt 151. This restricts the passage of the first sorted material M4-1 through the mesh belt 151, and therefore, the first sorted material M4-1 can be deposited on the mesh belt 151. Further, since the first screen M4-1 is stacked on the mesh belt 151 and conveyed to the downstream side together with the mesh belt 151, a first web M5 is formed as a layer.

Further, the first screen M4-1 may be mixed with, for example, dust or dirt. For example, dust or dirt is sometimes generated by coarse crushing or defibration. Further, such dust or dirt is recovered in a recovery portion 27 described later.

The suction unit 153 is a suction mechanism for sucking air from below the mesh belt 151. Thereby, the dust or dirt having passed through the mesh belt 151 can be sucked together with the air.

The suction unit 153 is connected to the recovery unit 27 via a pipe 244. The dust or dirt sucked out by the suction unit 153 is collected in the collection unit 27.

A pipe 245 is also connected to the recovery unit 27. Further, a blower 262 is provided midway in the pipe 245. By the operation of the blower 262, a suction force can be generated by the suction unit 153. Thereby, the formation of the first web M5 on the mesh belt 151 is promoted. The first web M5 becomes a substance from which dust, dirt, or the like has been removed. Further, the dust or dirt passes through the pipe 244 by the operation of the blower 262, and reaches the recovery portion 27.

The housing 142 is connected to the humidifying unit 232. The humidifying unit 232 is constituted by a vaporizing humidifier similar to the humidifying unit 231. This causes humidified air to be supplied into the case 142. Since the first sorted material M4-1 can be humidified by the humidified air, the first sorted material M4-1 can be prevented from adhering to the inner wall of the case 142 due to static electricity.

A humidifying unit 235 is disposed downstream of the screening unit 14. The humidifying unit 235 is formed of an ultrasonic humidifier for atomizing water. This enables moisture to be supplied to the first web M5, and therefore the moisture amount of the first web M5 is adjusted. By this adjustment, the adsorption of the first web M5 to the mesh belt 151 due to static electricity can be suppressed. Thereby, the first web M5 is easily peeled from the web belt 151 at the position where the web belt 151 is folded back at the tension roller 152.

The subdividing unit 16 is disposed downstream of the humidifying unit 235. The subdividing unit 16 is a portion for performing a dividing step of dividing the first web M5 peeled from the web belt 151. The subdividing unit 16 includes a screw 161 rotatably supported, and a case portion 162 housing the screw 161. The first web M5 can be divided by the rotating screw 161. The divided first web M5 becomes the minute body M6. Further, the sub-segment M6 descends within the housing portion 162.

The case portion 162 is connected to the humidifying portion 233. The humidifying unit 233 is constituted by a vaporizing humidifier similar to the humidifying unit 231. This causes humidified air to be supplied into the case portion 162. This humidified air also prevents the components M6 from being attached to the inner wall of the propeller 161 or the housing 162 by static electricity.

A mixing section 17 is disposed downstream of the subdividing section 16. The mixing section 17 is a section for performing a mixing step of mixing the finely divided body M6 and the resin P1. The mixing unit 17 includes a resin supply unit 171, a pipe 172, and a blower 173.

The pipe 172 is a flow passage for connecting the case portion 162 of the subdivided portion 16 and the case portion 182 of the disassembled portion 18 and for passing the mixture M7 of the subdivided portion M6 and the resin P1.

A resin supply unit 171 is connected to an intermediate portion of the pipe 172. The resin supply section 171 has a screw feeder 174. By rotationally driving the screw feeder 174, the resin P1 can be supplied as powder or particles to the pipe 172. The resin P1 supplied into the pipe 172 and the finely divided body M6 are mixed to become a mixture M7.

The resin P1 is a substance that bonds fibers to each other in a subsequent step, and for example, a thermoplastic resin, a curable resin, or the like can be used, but a thermoplastic resin is preferably used. Examples of the thermoplastic resin include AS resins, ABS resins, polyethylene, polypropylene, polyolefins such AS ethylene-vinyl acetate copolymers (EVA), modified polyolefins, propylene resins such AS polymethyl methacrylate, polyvinyl chloride, polystyrene, polyethylene terephthalate, polyesters such AS polybutylene terephthalate, nylon 6, nylon 46, nylon 66, nylon 610, nylon 612, nylon 11, nylon 12, nylon 6-12, polyamides (nylons) such AS nylon 6-66, polyphenylene ether, polyacetal, polyether, polyphenylene ether, polyether ether ketone, polycarbonate, polyphenylene sulfide, thermoplastic polyimide, polyether imide, liquid crystal polymers such AS aromatic polyesters, styrenes, polyolefins, polyvinyl chloride, polyurethanes, polyesters, polyamides, polybutadienes, trans-polyisoprenes, and the like, Various thermoplastic elastomers such as fluororubbers and chlorinated polyethylenes, and one or a combination of two or more selected from these can be used. More preferably, a polyester or a polyester-containing substance can be used as the thermoplastic resin.

The substance supplied from the resin supply unit 171 may contain, in addition to the resin P1, a colorant for coloring the fibers, an aggregation inhibitor for inhibiting aggregation of the fibers or aggregation of the resin P1, a flame retardant for making the fibers or the like nonflammable, a paper strength enhancer for enhancing the paper strength of the sheet S, and the like. Alternatively, a compound obtained by previously including the above-described substance in the resin P1 may be supplied from the resin supply unit 171.

Further, a blower 173 is provided midway in the pipe 172 on the downstream side of the resin supply unit 171. The division M6 and the resin P1 are mixed together by the action of a rotating portion such as a blade of the blower 173. Further, the blower 173 can generate an air flow toward the dismantling portion 18. By this airflow, the partition body M6 and the resin P1 can be stirred in the pipe 172. Thus, the mixture M7 can flow into the dismantling section 18 in a state where the finely divided body M6 and the resin P1 are uniformly dispersed. Further, the finely divided bodies M6 in the mixture M7 are disassembled in passing through the inside of the tube 172, thereby becoming finer fibrous.

The dismantling section 18 is a section for performing a dismantling process of dismantling the intertwined fibers in the mixture M7. The detaching portion 18 includes a roller portion 181 and a housing portion 182 that houses the roller portion 181.

The drum unit 181 is a screen formed of a cylindrical net body and rotating around its central axis. The mixture M7 flows into the drum part 181. Further, by the rotation of the drum part 181, fibers and the like in the mixture M7 smaller than the mesh of the net can pass through the drum part 181. At this point, mixture M7 was disassembled.

The case portion 182 is connected to the humidifying portion 234. The humidifying unit 234 is constituted by a vaporizing humidifier similar to the humidifying unit 231. This causes humidified air to be supplied into the case portion 182. Since the inside of the case 182 can be humidified by the humidified air, the mixture M7 can be prevented from adhering to the inner wall of the case 182 due to static electricity.

Further, the mixture M7 having been disassembled in the drum part 181 falls while being dispersed in the gas, and falls toward the second web forming part 19 located below the drum part 181. The second web forming portion 19 is a portion where the second web forming process of forming the second web M8 from the mixture M7 is performed. The second web forming section 19 has a mesh belt 191, a tension roller 192, and a suction portion 193.

The mesh belt 191 is an endless belt, and the mixture M7 is deposited thereon. The mesh belt 191 is wound around four tension rollers 192. Further, the mixture M7 on the mesh belt 191 is conveyed to the downstream side by the rotational drive of the tension roller 192.

The mixture M7 on the mesh belt 191 is mostly larger than the mesh of the mesh belt 191. This restricts the mixture M7 from passing through the mesh belt 191, and therefore, the mixture M7 can be deposited on the mesh belt 191. Further, since the mixture M7 is accumulated on the mesh belt 191 and conveyed to the downstream side together with the mesh belt 191, the second web M8 is formed as a layer.

The suction unit 193 is a suction mechanism that sucks air from below the mesh belt 191. This allows the mixture M7 to be sucked onto the mesh belt 191, thereby promoting the accumulation of the mixture M7 on the mesh belt 191.

The suction part 193 is connected to the pipe 246. A blower 263 is provided in the middle of the pipe 246. By the operation of the blower 263, a suction force can be generated by the suction portion 193.

The humidifying unit 236 is disposed downstream of the dismantling unit 18. The humidifying unit 236 is formed of an ultrasonic humidifier similar to the humidifying unit 235. This enables moisture to be supplied to the second web M8, and therefore the moisture amount of the second web M8 is adjusted. This adjustment can suppress the second web M8 from being attracted to the mesh belt 191 by static electricity. This makes it easy for the second web M8 to be peeled off from the mesh belt 191 at the position where the mesh belt 191 is folded back at the tension roller 192.

The amount of moisture (total moisture amount) added to the humidification units 231 to 236 is preferably 0.5% by mass or more and 20% by mass or less, for example, with respect to the material 100 before humidification, which is 100% by mass.

A sheet forming portion 20 is disposed downstream of the second web forming portion 19. The sheet forming section 20 is a section for performing a sheet forming step of forming a sheet S from the second web M8. The sheet forming section 20 includes a pressure section 201 and a heating section 202.

The pressing section 201 has a pair of calender rolls (calender rolls) 203, and can press the second web M8 between the calender rolls 203 without heating it. Thereby, the density of the second web M8 was increased. The degree of heating at this time is preferably such that the resin P1 is not melted, for example. The second web M8 is then conveyed toward the heating section 202. One of the pair of reduction rolls 203 is a drive roll driven by an operation of a motor (not shown), and the other is a driven roll.

The heating section 202 has a pair of heating rollers 204, and is capable of pressing while heating the second web M8 between the heating rollers 204. By this heating and pressing, the resin P1 is melted in the second web M8, and the fibers are bonded to each other via the melted resin P1. Thereby, the sheet S is formed. Then, the sheet S is conveyed toward the cutting section 21. One of the pair of heating rollers 204 is a driving roller driven by operation of a motor (not shown), and the other is a driven roller.

A cutting section 21 is disposed downstream of the sheet forming section 20. The cutting unit 21 is a part that performs a cutting process for cutting the sheet S. The cutting portion 21 has a first cutter 211 and a second cutter 212.

The first cutter 211 cuts the sheet S in a direction intersecting the conveying direction of the sheet S.

The second cutter 212 is a member that cuts the sheet S in a direction parallel to the conveying direction of the sheet S at the downstream side of the first cutter 211. This cutting is a method of removing unnecessary portions of both side ends (ends in the y-axis direction) of the sheet S to thereby trim the width of the sheet S, and the cut portions are called "trimmings".

By cutting with the first cutter 211 and the second cutter 212, a sheet S having a desired shape and size is obtained. Then, the sheet S is further conveyed to the downstream side and stored in the stacking portion 22.

The shredder 1 functions as a rough crush part for obtaining rough chips M2 by cutting the material M1. As described above, the shredder 1 includes the supply unit 3 to which the material M1 is supplied, and the cutting unit 4 that cuts the material M1 supplied to the supply unit 3. The structure of each part will be described below.

As shown in fig. 2 and 3, the cutting section 4 includes a rotary blade 5 rotatably supported, a driving section 42 for rotationally driving the rotary blade 5, and a circulating moving blade 6 for cutting the material M1 between the rotary blade 5 and the cutting section.

As shown in fig. 4, the rotary blade 5 includes a first shaft 50 disposed parallel to the y-axis direction, and a first rotary blade 51 and a second rotary blade 52 rotatably supported by the first shaft 50. That is, the rotary blade 5 includes a first shaft 50, and a first rotary blade 51 and a second rotary blade 52 fixedly provided on the first shaft 50.

The first shaft 50 is formed of a rod-shaped body having a circular cross-sectional shape, the first shaft 50 is supported on both sides, and one end side thereof is connected to the driving unit 42. by the driving unit 42 operating, as shown in fig. 4, the first shaft 50 can be made to rotate clockwise, i.e., as indicated by the arrow α, together with the first rotary blade 51 and the second rotary blade 52 ₅The direction is rotated.

The first shaft 50 is provided with a plurality of first rotary blades 51 and a plurality of second rotary blades 52. The first rotary blade 51 and the second rotary blade 52 are alternately arranged along the longitudinal direction of the first shaft 50. In addition, in fig. 4, the first rotary blade 51 having a part of the plurality of first rotary blades 51 is representatively depicted for easy understanding. In fig. 4, for the second rotating blade 52, the second rotating blade 52 having a part of the plurality of second rotating blades 52 is also representatively depicted.

Each first rotary blade 51 has a disk shape, and the center portion thereof is inserted with the first shaft 50, and each first rotary blade 51 can rotate around the first shaft 50 as indicated by an arrow α ₅The direction is rotated. The first rotary blades 51 and the first shaft 50 may be integrally formed, or may be fixed by press fitting or a key and a key groove.

A plurality of blades 512 are formed on the outer peripheral portion of each first rotary blade 51, and the blades 512 have an arrow α ₅A sharp cutting edge 511 projecting forward in the direction, i.e., the rotational direction of the first rotary blade 51. The blades 512 are arranged at equal intervals in the circumferential direction of the first rotary blade 51. The number of the blades 512 formed is 12 in the present embodiment, but is not limited to this, and may be appropriately changed according to the size of the first rotary blade 51, for example.

Further, a recessed portion 513 is formed between the circumferentially adjacent blades 512. The concave portion 513 has an arc shape when viewed from the y-axis direction.

The second rotary blades 52 are disk-shaped, and the center portion thereof is inserted with the first shaft 50, whereby the second rotary blades 52 are disposed concentrically with the first rotary blades 51, and the second rotary blades 52 can be rotated together with the first rotary blades 51 about the first shaft 50 as indicated by arrow α ₅The direction is rotated. The second rotary blades 52 and the first shaft 50 may be formed integrally, or may be fixed by press fitting or a key and a key groove.

Each second rotary blade 52 has a circular outer peripheral portion 521, i.e., a smaller diameter as viewed in the y-axis direction than the first rotary blade 51. Thus, each first rotary blade 51 is a member in which the blade 512 protrudes radially outward from the outer peripheral portion 521 of the second rotary blade 52 when viewed from the y-axis direction. The size of the second rotary blade 52 is not particularly limited, and for example, as shown in fig. 5, when a circle CL that is centered on the first axis 50 and contacts each concave portion 513 is assumed, it is preferably smaller than the circle CL.

Both the first rotary blade 51 and the second rotary blade 52 are preferably made of, for example, a hardened steel material.

The number of the first rotary blade 51 and the second rotary blade 52 arranged is plural, but the present invention is not limited thereto, and at least one of them is sufficient.

Although the thicknesses of the first rotary blades 51 are the same in the configuration shown in fig. 4, the thicknesses are not limited thereto and may be different.

The thicknesses of the second rotary blades 52 may be the same or different.

Although the thickness of the first rotary blade 51 and the thickness of the second rotary blade 52 are the same in the configuration shown in fig. 4, the thickness is not limited thereto and may be different.

The thicknesses of the first rotary blade 51 and the second rotary blade 52 are not particularly limited, and are, for example, preferably 1mm or more and 10mm or less, and more preferably 2mm or more and 5mm or less.

The rotary blade 5 includes at least one first rotary blade 51 having a disk shape and a second rotary blade 52 having a smaller diameter than the first rotary blade 51, and the second rotary blade 52 has a disk shape and is disposed concentrically with the first rotary blade 51.

In particular, in the present embodiment, the rotary blade 5 includes a plurality of first rotary blades 51 and a plurality of second rotary blades 52. As shown in fig. 4, the first rotary blade 51 and the second rotary blade 52 are alternately arranged along the first axis 50 direction, i.e., the y-axis direction. Accordingly, the cutting region AR in which the material M1 is cut between the rotary blade 5 and the circulating moving blade 6 can be ensured to be large in the y-axis direction, and thus the material M1 can be cut quickly regardless of the size, number of sheets, arrangement, and the like of the material M1 in the cutting region AR.

The rotary blade 5 having the above-described configuration can be driven by the driving unit 42. The configuration of the driving unit 42 is not particularly limited, and may be configured to include a motor and a reduction gear having a plurality of gears that mesh with each other, for example. Each gear can be rotated by driving of the motor. The rotational force is transmitted to the first shaft 50, so that the rotary blade 5 can be rotated about the first shaft 50 together with the first shaft 50.

In the present embodiment, the driving unit 42 is configured to drive the rotary blade 5 and to transmit the driving force to the circulating moving blade 6 to drive the circulating moving blade 6, but is not limited to this, and may be configured to drive the circulating moving blade 6 of the rotary blade 5 by providing a driving unit (not shown) that drives the circulating moving blade 6. In this case, when the circularly moving blade 6 circularly moves, the power for rotating the rotary blade 5 is transmitted to the rotary blade 5.

As shown in fig. 2 and 3, the circulating moving blade 6 that engages with the rotary blade 5 is disposed below the rotary blade 5, and the circulating moving blade 6 circulates on a non-circular orbit, and in the present embodiment, the circulating moving blade 6 is a member that circulates on an orbit including a linear portion and can move in a second axial direction intersecting with the first axis 50, that is, in an arrow α direction ₆The rotary blade 5 is moved in a direction to repeatedly move closer to and away from the rotary blade. The circulating blade 6 can cut the material M1 between itself and the rotary blade 5 during the circulating movement.

As shown in fig. 4, the circulating moving blade 6 has: a plurality of small pieces 61 having a cutting edge 611 between the rotary blade 5 and the small pieces, the cutting edge cutting the material M1; and a plurality of pins 62 that rotatably couple the adjacent small pieces 61 to each other. In addition, in fig. 4, a part of the plurality of pieces 61 of the piece 61 is representatively depicted for the convenience of understanding. With respect to the pin 62, in fig. 4, the pin 62 having a part of the plurality of pins 62 is also representatively depicted.

In the circulating moving blade 6, a plurality of the chips 61 are arranged in a row along the x-axis direction, and a plurality of the chips 61 forming the row are arranged along the y-axis direction. In fig. 4, a first column group of small pieces 631, and a second column group of small pieces 632 located on the y-axis direction positive side of the first column group of small pieces 631 are representatively depicted.

Between the first row small piece group 631 and the second row small piece group 632, a part of the first rotary blade 51 of the rotary blade 5 is inserted. Further, the first row group of small pieces 631 and the second row group of small pieces 632 each face the respective second rotating edge 52. By such a positional relationship, when the rotary blade 5 is rotated and the circulating blade 6 is circulated, the raw material M1 can be cut at a plurality of positions along the x-axis direction between the first rotary blade 51 of the rotary blade 5 and each of the chips 61. As a result, a plurality of elongated rough chips M2 can be obtained.

As shown in FIG. 5, the edge 611 of each tab 61 has a mark α indicated by an arrow ₆A forward-directed knife tip 612. Each cutting edge 612 can sequentially contact the outer peripheral portion 521 of the second rotary blade 52 of the rotary blade 5 in accordance with the cyclic movement of the cyclic moving blade 6. Each time this contact occurs, the rough chips M2 can be cut at a position halfway in the longitudinal direction between the cutting edge 612 and the second rotary blade 52. That is, the coarse chips M2 can be cut in the y-axis direction. Thus, the coarse chips M2 of the elongated strips can be obtained. The coarse pieces M2 are sized to be suitable for defibration in the defibration section 13.

As shown in fig. 4, each pin 62 is formed of a rod-like body having a circular cross-sectional shape. Each pin 62 connects the small pieces 61 in each row belonging to the first row small piece group 631 and the second row small piece group 632, and also connects the first row small piece group 631 and the second row small piece group 632.

As shown in fig. 6, the pins 62 can sequentially contact the cutting edges 511 of the first rotary blade 51 in accordance with the cyclic movement of the cyclic moving blade 6. Each time this contact occurs, the rough chips M2 can be cut at a halfway point in the longitudinal direction between the pin 62 and the cutting edge 511. That is, the coarse chips M2 can be cut in the y-axis direction. Thus, the coarse chips M2 of the elongated strips can be obtained. The coarse pieces M2 are also sized to be suitable for defibration in the defibration section 13.

As described above, the cutting section 4 includes the driving section 42 for rotationally driving the rotary blade 5 about the first shaft 50. Further, the rotary blade 5 has a recessed portion 513 formed between adjacent blades 512.

As shown in fig. 6, each of the recessed portions 513 of the rotary blade 5 has a function as a force transmission portion in which the recessed portions 513 of the rotary blade 5 sequentially mesh with the pins 62 of the circulating moving blade 6, and power for circulating the circulating moving blade 6 is transmitted in accordance with the rotation of the rotary blade 5 about the first shaft 50. This makes it possible to omit a configuration in which a driving unit for circularly moving the circularly moving blade 6 is provided separately from the driving unit 42, and thus, the configuration and control of the cutting unit 4 can be simplified.

As described above, the circulating blade 6 has a chain-like structure including the connecting member 60, and the connecting member 60 is formed by rotatably connecting the plurality of small pieces 61 having the blade 611 for cutting the material M1 between the circulating blade 6 and the rotary blade 5 via the pin 62. Thus, the circulating moving blade 6 formed of the connecting member 60 can be formed as an endless annular body as shown in fig. 2 and 3.

Cutting unit 4 has support unit 43 for supporting circulating moving blade 6 in a circulating manner, support unit 43 is composed of two sprockets 431 arranged separately in the x-axis direction, circulating moving blade 6 is integrally wound around sprockets 431, and sprockets 431 can be brought along with arrow α of circulating moving blade 6 ₆Cyclically moving in direction to arrow α ₄₃₁The direction is rotated. This enables the circularly moving blade 6 to be stably supported.

Further, by making the circulating moving blade 6, that is, the coupling body 60 an endless annular body, the small pieces 61 or the pins 62 of the circulating moving blade 6 can be repeatedly brought close to the rotary blade 5, and at this time, as described above, the raw material M1 can be cut to form the slender coarse pieces M2.

The small pieces 61 and the pins 62 are preferably made of, for example, a hardened steel material.

As shown in fig. 2 and 3, the portion of the circulating moving blade 6 constituted by the above-described connecting member 60 from the supply portion 3 for supplying the material M1 to the rotary blade 5 functions as the conveying portion 64 for conveying the material M1.

As described above, the raw material M1 is used waste paper. Therefore, in the raw material M1, for example, the raw material M1 deformed such as the folded raw material M1, the raw material M1 that undulates by bending, the raw material M1 that wrinkles, and the folded raw material M1 may be mixed. Even when the material M1 is deformed as described above, the material M1 can be smoothly conveyed to the rotary blade 5 by the conveying unit 64, and the material M1 can be cut by the cutting unit 4.

The small pieces 61 are linearly connected to the conveying unit 64 along the horizontal direction, i.e., the xy plane. Thus, the material M1 can be stably conveyed, and therefore, the material M1 can be cut by the rotary blade 5 at the conveyance destination. In addition, the conveying portion 64 may include a curved portion at least in part.

By providing the circulating moving blade 6 with the conveying portion 64 in this manner, the supply portion 3 can obtain the configuration shown in fig. 2 or the configuration shown in fig. 3, for example, depending on the arrangement position of the supply port 31 for supplying the raw material M1.

As shown in fig. 2 and 3, in any of the configurations, the supply unit 3 includes a frame 32 that covers the conveyance unit 64 from above. The frame 32 includes a top plate 321 facing the conveying unit 64, and a side plate 322 surrounding the conveying unit 64 in a plan view. The frame 32 is formed with a supply port 31 that communicates the inside and outside of the frame 32 so as to form an opening.

In the configuration shown in fig. 2, the supply port 31 is formed on the x-axis direction positive side of the top plate 321 and is disposed so as to face the conveying section 64 side. On the other hand, in the configuration shown in fig. 3, the supply port 31 is formed on the x-axis direction positive side of the side plate 322 and is disposed so as to face the rotary blade 5 side.

In the configuration shown in fig. 2, for example, when the supply port 31 is located lower than the waist height of a general user of the sheet manufacturing apparatus 100, the supply operation of the raw material M1 can be easily performed.

In the configuration shown in fig. 3, for example, when the supply port 31 is located above the waist height of a typical user of the sheet manufacturing apparatus 100, the supply operation of the material M1 can be easily performed.

In this way, in the supply section 3, the arrangement position of the supply port 31 with respect to the frame 32 can be changed according to the arrangement height of the supply port 31.

In addition, the configuration shown in fig. 2 and the configuration shown in fig. 3 may be combined. That is, the supply port 31 having the structure shown in fig. 3 may be incorporated in the supply unit 3 having the structure shown in fig. 2.

As described above, in the used waste paper raw material M1, for example, there is a case where raw materials M1 that have been deformed such as a folded raw material M1, a raw material M1 that has been bent and undulated, a folded raw material M1, and a folded raw material M1 are mixed. Therefore, the size of the opening of the supply port 31 is preferably a size sufficient to ensure that the raw material M1 is supplied to the supply port 31 regardless of the size or deformation state of the raw material M1.

The supply port 31 is separated from the rotary blade 5 by an amount corresponding to the conveyance portion 64 provided in the circulating moving blade 6. Thus, even if the opening size of the supply port 31 is sufficiently secured, the wrist, hand, or the like of the user of the sheet manufacturing apparatus 100 can be prevented from reaching between the rotary blade 5 and the circulating blade 6 from the supply port 31. This prevents the wrist or hand of the user from being caught between the rotary blade 5 and the circular moving blade 6, thereby improving safety for the user.

Further, a human detection sensor 33 is provided inside the housing 32 in the vicinity of the supply port 31. The human detection sensor 33 is not particularly limited, and may be a sensor that detects infrared rays emitted from the wrist or hand of the user, or may be another type such as a capacitance sensor or a laser sensor. Thus, when the wrist or hand of the user enters the supply port 31, the entry can be detected. Then, the detection result is reported via a reporting unit, not shown. This can prompt the user to pull out the wrist or the like from the supply port 31. In addition, when intrusion is detected, the driving of the rotary blade 5 and the circulating moving blade 6 may be forcibly stopped.

As described above, in the sheet manufacturing apparatus 100, by providing the circulating moving blade 6 with the conveying section 64, it is possible to secure more design freedom in the size, shape, number, arrangement position, and the like of the supply port 31 when designing the supply section 3.

As described above, the shredder 1 according to the present invention includes: a supply unit 3 having a supply port 31 to which a sheet as a raw material M1 is supplied; and a cutting unit 4 for cutting the material M1 (sheet) supplied to the supply unit 3.

Cutting section 4 has rotary blade 5, which rotates around first shaft 50 in the direction of arrow α ₅Rotating in the direction of rotation, and cyclically moving the blade 6 in a non-circular orbit, i.e. in a second axial direction intersecting the first axis 50, indicated by the arrow α ₆The material M1 is cut between the rotating blade 5 and the material while moving in a circulating manner in a direction to repeatedly approach and separate from the rotating blade 5.

The circulating moving blade 6 further includes a conveying unit 64, and the conveying unit 64 conveys the material M1 from the supply unit 3 to the rotary blade 5.

According to the present invention, as described above, the conveying section 64 can ensure more design freedom in designing the supply section 3, such as the size, shape, number, and arrangement position of the supply ports 31. In particular, the degree of freedom in setting the shape and the form of the circulating moving blade 6, the path length and the arrangement position of the conveying unit 64, and the like is high.

The sheet manufacturing apparatus 100 is provided with a shredder 1, and can manufacture a new sheet S using a sheet as a raw material M1 cut by the shredder 1.

Thus, the sheet S can be appropriately and efficiently manufactured while enjoying the advantages of the shredder 1 described above.

Second embodiment

Fig. 7 is a diagram showing a positional relationship between the rotary blade and the circular moving blade in the shredder according to the second embodiment of the present invention.

Hereinafter, a second embodiment of the shredder and the sheet manufacturing apparatus according to the present invention will be described with reference to the drawings, but differences from the above-described embodiments will be mainly described, and descriptions of the same matters will be omitted.

This embodiment is the same as the first embodiment except that the positional relationship between the rotary blade and the circularly moving blade is different.

As shown in fig. 7, in the present embodiment, the first rotary blade 51 of the rotary blade 5 is disposed at a position to such an extent that the pins 62 of the circulating moving blade 6 are prevented from entering the recesses 513. In this case, although not shown, a driving unit for circularly moving the circularly moving blade 6 is provided separately from the driving unit 42.

This structure is effective when the rotation of the rotary blade 5 and the cyclic movement of the cyclic moving blade 6 are to be made independent of each other.

Third embodiment

Fig. 8 is a schematic side view showing a third embodiment of the shredder of the present invention.

Hereinafter, a third embodiment of the shredder and the sheet manufacturing apparatus according to the present invention will be described with reference to the drawings, but differences from the above-described embodiments will be mainly described, and descriptions of the same matters will be omitted.

This embodiment is the same as the first embodiment except that the structure of the shredder is different.

As shown in fig. 8, in the shredder 1, the circulating moving blade 6 is integrally wound around four sprockets 431.

Further, a driving unit 44 for circularly moving the circularly moving blade 6 is coupled to one of the four sprockets 431. The configuration of the driving unit 44 is not particularly limited, and may be, for example, a configuration including a motor and a reduction gear having a plurality of gears that mesh with each other.

The supply portion 3 has three supply ports 31 formed in the top plate 321. The three supply ports 31 are arranged at intervals along the conveying direction of the raw material M1 by the circulating moving blade 6. Hereinafter, the three supply ports 31 are referred to as "supply port 31A", "supply port 31B", and "supply port 31C" in this order from the upstream side in the conveying direction of the raw material M1.

The raw material M1 is forcibly fed into the supply port 31A by a not-shown forced feed roller. Hereinafter, this raw material M1 is referred to as "raw material M1-1". The raw material M1-1 was a sheet.

The raw material M1 is fed into the supply port 31B manually, i.e., manually. Hereinafter, this raw material M1 is referred to as "raw material M1-2". The raw material M1-2 was a sheet.

As described above, the sheet manufacturing apparatus 100 includes the cutting unit 21 that cuts the sheet S. The cutting section 21 has a second cutter 212. The sheet S is cut by the second cutter 212 so that one edge portion and the other edge portion are positioned in a direction intersecting the conveying direction, that is, in the y-axis direction. Then, by this cutting, a band-like surplus portion S1 called "scrap" is generated. The surplus S1 is a sheet, and is transferred to the feed port 31C of the shredder 1 for coarse shredding and reuse through a path not shown, or is stacked for reuse.

As shown in fig. 8, the circulating blade 6 formed of the above-described connected body 60 is formed with a wound portion 65, and the wound portion 65 is in a state in which the small piece 61 is wound along the circumferential direction of the rotary blade 5. The winding portion 65 is formed immediately behind the conveying portion 64. In addition, the winding angle θ of the winding part 65 is ₆₅The angle is 90 degrees in the structure shown in fig. 8, but the structure is not limited thereto.

With this configuration, the cutting area AR can be further increased by the amount corresponding to the winding portion 65. Thus, for example, even when the raw material M1-1, the raw material M1-2, and the remainder S1 are supplied to the supply section 3 almost simultaneously, they can be cut quickly and smoothly.

In the present embodiment, the rotary blade 5 is driven by driving the circulating moving blade 6, but the present invention is not limited thereto, and the circulating moving blade 6 may be driven by driving the rotary blade 5.

Further, the rotation of the rotary blade 5 and the circulating movement of the circulating moving blade 6 may be performed independently.

Although the shredder and the sheet manufacturing apparatus according to the present invention have been described above with reference to the illustrated embodiments, the present invention is not limited thereto, and various components constituting the shredder and the sheet manufacturing apparatus may be replaced with any components that can perform the same function. In addition, any structure may be added.

In addition, the shredder and the sheet manufacturing apparatus according to the present invention may be combined with any two or more of the structures (features) in the above embodiments.

The first rotary blades arranged along the y-axis may be arranged on the first axis so as to be offset by a predetermined angle around the first axis. That is, each of the first rotary blades may be disposed so as to be twisted along the longitudinal direction of the first shaft.

Description of the symbols

100 … sheet manufacturing apparatus; 1 … paper shredder; 3 … supply part; 31 … supply port; 31a … supply port; 31B … supply port; a 31C … supply port; a 32 … frame body; 321 … a top plate; 322 … side panels; 33 … human detection sensor; 4 … cutting part; 41 … chutes; 42 … driving part; 43 … support portion; 44 … driving part; 431 … sprocket; 5 … rotary blade; 50 … first shaft; 51 … first rotating edge; 511 … knife tip; 512 … edges; 513 … recess; 52 … second rotating edge; 521 … outer periphery; 6 … moving the blade circularly; 60 … connection body; a 61 … tablet; 611 … edge; 612 … knife tip; 62 … pin; 631 … first column of groups of tablets; 632 … second row of platelet groups; a 64 … conveying section; 65 … windings; 13 … defibering part; 14 … screening part; 141 … roller part; 142 … housing portion; 15 … a first web forming portion; 151 … mesh tape; 152 … tension roller; 153 … suction part; 16 … subdivision; a 161 … propeller; 162 … housing portion; 17 … mixing section; 171 … resin supply; 172 … tubes; 173 a blower 173 …; 174 … screw feeder; 18 … disassembled part; 181 … a drum portion; 182 … housing portion; 19 … a second web forming portion; 191 … mesh tape; 192 … tension roller; 193 … suction part; 20 … sheet forming part; 201 … pressurizing part; 202 … heating section; 203 … calenderingRoller, 204 … heating roller, 21 … cutting section, 211 … first cutter, 212 … second cutter, 22 … stacking section, 231 … humidifying section, 232 … humidifying section, 233 … humidifying section, 234 … humidifying section, 235 … humidifying section, 236 … humidifying section, 241 … tube, 242 … tube, 243 … tube, 244 … tube, 245 … tube, 246 … tube, 261 … blower, 262 … blower, 263 … blower, 27 … recovering section, 28 … control section, 281 … CPU, 36282 storage section, AR … cutting area, CL … circle, M … raw material, M … -1 … raw material, M … -2 … raw material, M … coarse fragment, M … defibering material, M … -1 first screening material, M … -2 screening material, M … M fine screening material, M … M, M fine screening material M … M, M … ₄₃₁… arrow mark, α ₅… arrow mark, α ₆… arrow marks; theta ₆₅… winding angle.