JP7137813B2 - Shredder and opening restraint mechanism used therein - Google Patents

Description

TECHNICAL FIELD The present invention relates to a shredder for simultaneously shredding objects of different thicknesses, and more particularly, to a shredder that reduces leakage of noise from the carry-in route associated with the shredding of objects by a shredding mechanism. It relates to an opening suppression mechanism used for.

Conventional shredders of this type are already known, for example, those described in Patent Documents 1 to 6.
In Patent Document 1, in order to prevent the generation of noise due to the fluttering of the shredded paper that occurs when the shredded paper is caught in the cutter, two shredded blades are placed in front of the cutter facing each other. A shredder is disclosed in which a tensioning roller is arranged in which two rollers are arranged in parallel so that the shredded paper feeding speed of the tensioning roller is slower than the shredded paper cutting speed of the cutter.
In Patent Document 2, a pair of rollers made of a sound absorbing member is arranged on the way to a cutter blade in a paper path, and the paper is conveyed by the pair of rollers, and the sound of cutting the paper by the cutter blade is suppressed. A sound insulation device for a shredder device is disclosed, which uses a pair of rollers to block noise from propagating through a paper path and leaking to the outside.
In Patent Document 3, a straight line connecting the edge of the insertion slot and the edge of the insertion path that opens into the case body is formed in the middle part of the insertion path so as to suppress noise leaking to the outside from the insertion slot during shredding. A shredder is provided with a curved portion that obstructs the object to be shredded so that the object to be shredded advances while blocking the insertion passage, thereby suppressing noise generated during shredding processing from leaking to the outside through the insertion passage. disclosed.
Patent Document 4 discloses a lid member having an inlet formed thereon, a guide portion that guides movement of a work material from the inlet toward a cutting position by a fixed blade and a movable blade, and a material that has been cut at the cutting position. A shredder is disclosed that includes a rubber cover that restrains cutting material from exiting an inlet.
Patent Document 5 discloses a pair of rollers, at least one of which is rotatably supported in parallel with the cutter rows between the inlet and the two cutter rows and relatively movable in a direction toward each other, A document shredding device is disclosed that includes noise detection means for detecting the shredding sound of a shredding cutter, and roller movement means for relatively moving a pair of rollers in response to a detection signal from the noise detection means.
In Patent Document 6, a pair of sound insulating materials are arranged between the input port and the two cutter rows in parallel with the two cutter rows, and at least one of the pair of sound insulating materials has an eccentric shaft in a direction to approach each other. A document shredding device is disclosed that is pivotally supported at a center.

Japanese Patent Application Laid-Open No. 2009-119454 (best mode for carrying out the invention, FIG. 2) Japanese Patent Application Laid-Open No. 9-234382 (Embodiment of the Invention, FIG. 1) JP 2007-268336 A (best mode for carrying out the invention, FIG. 2) Japanese Patent Application Laid-Open No. 2005-66575 (best mode for carrying out the invention, FIG. 2) Japanese Utility Model Publication No. 2-17634 (Example of device, Fig. 1) Japanese Utility Model Publication No. 2-2432 (Example of device, Fig. 1)

However, in Patent Documents 1 to 6 described above, there is a concern that the following problems may occur.
In Patent Documents 1 and 2, both the tension applying roller and the roller composed of a pair of sound absorbing members are driven, so a driving source and a driving transmission mechanism are inevitably necessary, and the apparatus Configuration becomes complicated.
In Patent Document 3, the shape of the insertion passage is devised (bent portion) to suppress noise leakage from the insertion passage. There is concern that the insertion operation of the object may be impaired.
Furthermore, in Patent Document 4, by providing a large number of slits at predetermined intervals along the opposing portions of a pair of rubber covers, it is possible to facilitate the deformation of the rubber covers as the work material is introduced. It is possible, but there is a concern that the presence of the rubber cover will act as a resistance when inserting a work material made of, for example, a sheet of thin paper, impairing the insertion operation of the work material.
Furthermore, in Patent Document 5, when noise is detected, the pair of rollers are moved toward each other by the roller moving means to block the noise. There is concern about noise leakage.
Further, in Patent Document 6, due to the frictional force between a document or the like and a pair of sound insulating materials, at least one sound insulating material swings about an eccentric shaft in a direction in which at least one sound insulating material approaches each other. When a sheet of thin paper is put in and comes into contact with the sound insulating material, if the thin paper undergoes buckling deformation, there is a concern that the insertability of documents and the like will be impaired.

The technical problem to be solved by the present invention is to secure the removability when the material to be shredded is clogged and to prevent the material from being shredded from being damaged when the material to be shredded is shredded by the shredding mechanism. To reduce the situation in which the noise generated by the engine leaks to the outside.

A first technical feature of the present invention is a shredder housing having an inlet into which one or more pieces of material to be shredded are introduced and a loading path for carrying in the material to be shredded that has been introduced into the inlet, A shredding mechanism provided in the middle of the carrying-in route in the shredder housing for shredding an object to be shredded, and a part of the carrying-in route from the inlet to the shredding mechanism, The opening width corresponding to the thickness direction of the object to be shredded in the carry-in path is restricted to at least a predetermined minimum opening width through which one sheet of the object to be shredded can pass, and the thickness dimension is equal to or greater than the minimum opening width. an opening suppression mechanism that allows the shredded object to be carried in with the opening of the carry-in path blocked when the object to be shredded is carried in; It protrudes into the area and secures the gap of the minimum opening width, and when an object to be shredded with a thickness dimension equal to or larger than the gap is brought in, the thickness of the object to be shredded is reduced by contact with the object to be shredded. A restraining roll that retracts and moves according to the pressure, a supported portion is provided at both ends of the restraining roll, a support portion is provided in the shredder housing so as to face the supported portion, and the support portion and the supported portion are provided. A cavity is formed in either one of the support parts, and a protrusion extending in the axial direction of the restraining roll is formed in the other of the support parts, and the protrusion is arranged in the cavity in a state of contact with play. and a support mechanism that suspends and supports the restraint roll so as to be retractable in any direction.

A second technical feature of the present invention is the shredder having the first technical feature, wherein the suppression roll has large diameter portions on both axial end peripheral surfaces of the roll body, and The large-diameter portion is brought into contact with an opposing member facing the restraint roll, and a gap of the minimum opening width is secured between a portion of the roll body other than the large-diameter portion and the opposing member. It is a shredder that
A third technical feature of the present invention is the shredder having the first technical feature, wherein the support mechanism has the hollow portions at both ends of the restraining roll, and the projections on the shredder housing side. A shredder characterized by having
A fourth technical feature of the present invention is the shredder having the first technical feature, wherein the restraint roll is a hollow cylindrical roll, and the inner diameter portions of the portions facing both ends of the cylindrical roll are This shredder is characterized by having a cavity.
A fifth technical feature of the present invention is the shredder having the first technical feature, wherein the restraint roll is a solid cylindrical roll, has the protrusions at both ends thereof, and The shredder is characterized by having a cavity in the
A sixth technical feature of the present invention is the shredder having the first technical feature, wherein the shredder housing has an opening/closing lid that opens and closes the carry-in path, and the restraining roll is supported by the opening/closing lid. This shredder is characterized by supporting through a mechanism.
A seventh technical feature of the present invention is, in the shredder having the first technical feature, a predetermined shredder corresponding to the maximum thickness of the material to be shredded that can be shredded when the restraining roll is retracted. A shredder characterized in that it comprises a detector capable of detecting a condition in which a specified tolerance has been exceeded.
According to an eighth technical feature of the present invention, in the shredder having the first technical feature, a portion of the carry-in path between the opening restraining mechanism and the shredding mechanism is provided in a portion to be shredded. The shredder is characterized by comprising an opening restricting mechanism for restricting the opening width corresponding to the thickness direction of the object to a predetermined allowable opening width corresponding to the maximum shredable thickness of the object to be shredded.

A ninth technical feature of the present invention is provided in a part of the loading path from the inlet to the shredding mechanism, and the opening width corresponding to the thickness direction of the material to be shredded in the loading path is at least A state in which the width of the opening is restricted to a predetermined minimum opening width through which one piece of material to be shredded can pass, and the opening of the carrying-in path is closed when the material to be shredded having a thickness dimension equal to or greater than the minimum opening width is carried in. an opening restraining mechanism for allowing an object to be shredded to be carried in through the area of the carrying-in path, the opening restraining mechanism projecting into the area of the carrying-in path to secure a gap of the minimum opening width, and having a thickness dimension equal to or larger than the gap When the object to be shredded is brought in, a restraining roll that moves away according to the thickness of the object to be shredded by contact with the object to be shredded, and supported portions are provided at both ends of the restraining roll, and A support portion is provided in the shredder housing so as to face the supported portion, and one of the support portion and the supported portion has a hollow portion and the other extends in the axial direction of the restraint roll. and a support mechanism that forms projections, arranges the projections in contact with each other with play in the cavity, and suspends and supports the restraint roll so as to be retractable and movable in any direction. It is an opening suppressing mechanism.

According to the first aspect of the invention, the noise generated when the material to be shredded by the shredding mechanism shreds the material to be shredded without impairing the removability when the material to be shredded is clogged and the ability to carry the material to be shredded. leakage to the outside can be reduced. In particular, the restraint roll can be supported without contact between the restraint roll and the dividing member that divides the carry-in path, and a gap of the minimum opening width can be secured for the entire widthwise width of the carry-in path.
According to the second aspect of the invention, it is possible to secure the minimum opening width gap by adjusting the amount of projection of the large-diameter portion of the restraint roll.
According to the third aspect of the present invention, it is possible to secure the minimum opening width gap due to the restraint rolls with a support structure having a simple configuration.
According to the fourth aspect of the invention, it is possible to secure the minimum opening width gap by the restraining roll by using the hollow cylindrical restraining roll.
According to the fifth aspect of the present invention, it is possible to secure the minimum opening width gap by the restraint roll by using the solid columnar restraint roll.
According to the sixth aspect of the present invention, the shredded material can be removed more easily by opening the openable lid when the shredded material is clogged, compared to the case where the shredded material is not provided.
According to the seventh aspect of the invention, the suppression roll can also be used as a thickness abnormality detector for the object to be shredded inserted into the inlet.
According to the eighth aspect of the invention, it is possible to prevent a clogging accident caused by an excessive amount of material to be shredded, as compared with a mode in which the opening restricting mechanism is not provided.
According to the ninth aspect of the invention, the noise generated when the material to be shredded by the shredding mechanism shreds the material to be shredded without compromising the removability when the material to be shredded is clogged and the ability to carry the material to be shredded is not impaired. In addition to reducing the leakage of outside, the restraint roll can be supported without contact between the division member that divides the carry-in route and the restraint roll, and the minimum opening for the entire width direction of the carry-in route It is possible to provide an opening restraint mechanism capable of securing a width gap .

(a) is an explanatory diagram showing an outline of an embodiment of a shredder to which the present invention is applied, and (b) is an opening suppression mechanism under the condition that the thickness of an object to be shredded is less than a predetermined minimum opening width. FIG. 9C is an explanatory diagram showing an operation example, and (c) is an explanatory diagram showing an operation example of the opening suppression mechanism under the condition that the thickness of the material to be shredded is equal to or greater than a predetermined minimum opening width. 1 is an explanatory diagram showing the overall configuration of a shredder according to Embodiment 1; FIG. (a) is an explanatory diagram showing an opening restraining mechanism used in Embodiment 1, and (b) is an explanatory diagram showing a support mechanism for the opening restraining mechanism shown in (a). (a) is an explanatory diagram showing an example of the operation of the aperture control mechanism under the condition that the thickness of the paper is less than the predetermined minimum opening width; FIG. 5 is an explanatory diagram showing an operation example of an opening suppression mechanism under certain conditions; FIG. 5 is an explanatory diagram showing a state in which the opening suppressing mechanism according to Embodiment 1 is opened; (a) is an explanatory view showing the main part of the suppression roll of the opening suppression mechanism according to Modification 1-1; FIG. 10D is an explanatory view showing a main part of the suppression roll of the opening suppression mechanism according to -2, and FIG. (a) is an explanatory view showing the support structure of the suppression roll of the opening suppression mechanism according to Modification 1-3, and (b) is an illustration showing the support structure of the suppression roll of the opening suppression mechanism according to Modification 1-4. Figure, (c) is a view seen from the direction C in (b). (a) is an explanatory diagram showing a main part of an opening suppressing mechanism of a shredder according to Embodiment 2, and (b) is an explanatory diagram showing an example of signal processing of a medium-thickness abnormality detector (a). 9 is a flowchart showing a shredding control process of the shredder according to Embodiment 2; FIG. 11 is an explanatory diagram showing a main part of a shredder according to Embodiment 3; FIG. 11 is an explanatory diagram showing an opening restricting mechanism used in Embodiment 3; (a) is an explanatory diagram showing an example of a positioned portion of a positioning mechanism used in an opening regulating mechanism according to Embodiment 3, and (b) is an explanation showing an example of a positioning portion for positioning the positioned portion of the same positioning mechanism; It is a diagram. FIG. 12 is an explanatory diagram showing a main part of the opening restricting mechanism according to FIG. 11; 17A and 17B are explanatory diagrams showing the operation of the opening restricting mechanism according to FIG. 16; 10 is a flow chart showing a shredding control process of the shredder according to Embodiment 3. FIG. (a) is an explanatory diagram showing the operation of the opening regulating mechanism according to the third embodiment when paper is loaded, and (b) is an explanatory diagram showing the operation of the same opening regulating mechanism when paper is discharged. FIG. 11 is an explanatory diagram showing a main part of an opening restricting mechanism according to Modified Mode 3-1;

◎Outline of Embodiment FIG. 1(a) shows an outline of an embodiment of a shredder to which the present invention is applied.
In the figure, the shredder is a shredder housing 1 having an inlet 2 into which one or a plurality of shredded objects S are introduced and a loading path 3 through which the shredded objects S introduced into the inlet 2 are carried. , a shredding mechanism 4 for shredding the object S to be shredded provided in the middle of the carry-in route 3 in the shredder housing 1, and a part of the carry-in route 3 from the inlet 2 to the shredding mechanism 4 provided in the carry-in path 3, the opening width corresponding to the thickness direction of the object S to be shredded is suppressed to the minimum opening width through which at least one predetermined object to be shredded can pass, and the minimum opening width an opening suppression mechanism 5 that allows the shredded object S to be carried in with the opening of the carry-in path 3 blocked when the object S to be shredded having the above thickness dimension is carried in; The mechanism 5 is arranged so as to protrude into the area of the carry-in path 3 to secure a gap g of a minimum opening width, and when an object S to be shredded having a thickness dimension equal to or larger than the gap g is carried in, the object S to be shredded is The restraint roll 6 retracts and moves according to the thickness of the object S to be shredded by contact, and supported portions are provided at both ends of the restraint roll 6, and the shredder housing 1 faces the supported portion A supporting portion is provided, and one of the supporting portion and the supported portion is formed with a hollow portion 7a, and the other is formed with a projection 7b extending in the axial direction of the restraining roll 6, and the projection is formed in the hollow portion 7a. 7b are placed in contact with each other with play, and the restraint roll 6 is suspended and supported so as to be retractable and movable in any direction.

In such technical means, the opening suppression mechanism 5 may be provided in the middle of the carry-in route 3 from the inlet 2 to the shredding mechanism 4 or may be provided at a location facing the inlet 2 .
In addition, the minimum opening width may be a dimension through which one predetermined object S to be shredded can pass, and it is of course possible to select a dimension through which a plurality of objects S to be shredded can pass. is.
Furthermore, when the object S to be shredded with a thickness dimension equal to or larger than the minimum opening width is carried in, it is sufficient if the object S to be shredded is allowed to be carried in with the opening of the carry-in path 3 closed. .
Furthermore, the restraint roll 6 may be a hollow cylindrical roll or a solid columnar roll as long as it protrudes into the area of the carry-in route 3 and secures the gap g of the minimum opening width. Further, when the object S to be shredded with a thickness exceeding the gap g passes, the restraining roll 6 needs to be retracted.
In this example, as the support mechanism 7, supported portions are provided at both ends of the restraining roll 6, a support portion is provided on the shredder housing 1 side, and a hollow portion 7a is provided in one of the support portion and the supported portion, and the other is provided. By forming the protrusions 7b in the cavity 7a and arranging the protrusions 7b in the cavity 7a with play, the restraining roll 6 can be retracted in any direction. Here, the cross-sectional shape of the hollow portion 7a may be appropriately selected from a circle, an ellipse, a sector, an elongated hole, and the like. Also, the play between the hollow portion 7a and the projecting body 7b should at least ensure the retraction movement amount of the restraining roll 6 when the material to be shredded S having the maximum thickness that can be shredded is put in. It is preferable to secure the amount of retreating movement of the restraining roll 6 when the material S to be shredded with the maximum thickness that can be thrown into the carry-in path 3 is thrown.

Next, the operation of the opening suppression mechanism 5 according to this embodiment will be described.
First, as shown in FIG. When the object to be shredded S1 is thrown from the inlet 2 and carried into the carry-in path 3, the restraint roll 6 secures the gap g by using the lower partitioning member that partitions the lower side of the carry-in path 3 as the facing member 3a. placed. This gap g has an opening width narrower than the opening width y in the thickness direction of the object S1 to be shredded on the carry-in path 3, but is set larger than the thickness t1 of the object S1 to be shredded. The shredded material S1 passes through the gap g between the restraining roll 6 and the lower partitioning member as the opposing member 3a and reaches the shredding mechanism 4. As shown in FIG.
At this time, even if the one sheet-like material that is the material to be shredded S1 is thin paper and has a low surface rigidity, the material to be shredded S1 moves along the lower partition member, and the restraint roll 6 and the material to be shredded move. It is carried in while leaving a minute gap corresponding to |g−t1| between them. Even if the tip of the object to be shredded S1 is bent or slightly rounded during such a carrying-in process, the tip of the object to be shredded S1 may come into contact with the restraint roll 6, but the restraint roll Since the part of 6 that contacts the object to be shredded S1 has a curved surface, the tip of the object to be shredded S1 is smoothly guided to the gap g of the restraining roll 6, No worries about clogging.
In this state, when the object S1 to be shredded is shredded by the shredding mechanism 4, the shredding sound of the shredding mechanism 4 is transmitted through the loading path 3 and directed toward the loading port 2 side. In the middle of the path 3, a gap g having an opening width narrower than that of other portions is formed between the restraining roll 6 and the opposing member 3a, and most of the gap g is occupied by the material to be shredded S1. Therefore, in the gap g portion between the restraint roll 6 and the lower partitioning member as the opposing member 3a, only a minute gap of |g−t1| Shredded sound is greatly attenuated in minute gaps.
In addition, since part of the non-shredded portion of the material to be shredded S1 located on the downstream side in the carry-in direction passes through the gap g between the restraint rolls 6, when the material to be shredded S1 is shredded, Even if the rear end of the object to be shredded S1 is about to flutter in the carry-in path 3, the amount of fluttering of the object to be shredded S1 is suppressed by the gap g, and the rear end of the object to be shredded S1 flutters accordingly. Noise is less likely to occur.

Also, as shown in FIG. The shredded material S2 is conveyed toward the shredding mechanism 4 along the lower partition member of the carry-in path 3 while the restraint roll 6 is retracted when passing through the gap g of the restraint roll 6 .
At this time, since the object to be shredded S2 is composed of a plurality of sheet-like materials, even if the surface rigidity of one sheet-like material is weak, it is possible to increase the surface rigidity itself. . For this reason, the suppression roll 6 presses the object S2 to be shredded by its own weight. If the restraint roll 6 is set in advance to such an extent that the restraint roll 6 can be moved in the retreating direction due to the rigidity, the object to be shredded S2 can pass through the gap g between the restraint roll 6 while the restraint roll 6 is retreated. . In particular, in this example, since the support mechanism 7 of the restraint roll 6 has a structure in which the protrusions 7b are arranged with play in the hollow portion 7a, the retraction movement trajectory of the restraint roll 6 is in an arbitrary direction, and the restraint roll The restraint roll 6 is easily retracted when a pushing force is applied to the restraint roll 6 from the object S2 to be shredded.
In this state, when the object to be shredded S2 is shredded by the shredding mechanism 4, the shredding sound of the shredding mechanism 4 is transmitted through the carry-in path 3 and directed toward the inlet 2, but in this example, the shredding sound is suppressed. Since the roll 6 moves in the retreating direction as the object to be shredded S2 having high surface rigidity passes, the width of the opening between the restraint roll 6 and the lower partitioning member as the facing member 3a is equal to that of the object to be shredded S2. With the thickness t2 of , the size of the gap g when the restraining roll 6 is positioned at the initial position is expanded, and the object to be shredded S2 is between the restraining roll 6 that has retreated and the lower partitioning member as the opposing member 3a. It is arranged in a state of closing the gap g. Therefore, since the gap g between the restraint rolls 6 is sealed with the material to be shredded S2, most of the shredding noise by the shredding mechanism 4 is blocked by the gap g between the restraint rolls 6 of the carry-in path 3. As a result, the fear of leakage to the outside from the inlet 2 of the carry-in route 3 is reduced. In addition, even if the rear end of the object S2 to be shredded flutters in the carry-in path 3 when the object S2 to be shredded is shredded by the shredding mechanism 4, the movement of the object S2 to be shredded is suppressed by the restraint roll 6. Therefore, the rear end of the object to be shredded S2 is suppressed from rattling in the carry-in path 3, and the noise associated with the rattling is reduced.

With such an opening suppressing mechanism 5 , even if the object S to be shredded is shredded by the shredding mechanism 4 , the shredding sound of the shredding mechanism 4 is directly transmitted to the outside through the carry-in path 3 . There is little concern that it will leak to Further, even if the rear end of the object S to be shredded flutters, the rear end of the object S to be shredded is suppressed by the opening suppression mechanism 5, so there is little concern that the rear end of the object S to be shredded flutters.
In particular, in this example, when the object S to be shredded jammed in the shredding mechanism 4 is pulled out, the restraint roll 6 is retracted in an arbitrary direction following the pull-out motion of the object S to be shredded. There is little concern that the restraint roll 6 will interfere with the operation of pulling out the piece S.

Next, typical aspects or preferred aspects of the shredder according to the present embodiment will be described.
First, as a typical support structure of the restraint roll 6, there is a mode in which the restraint roll 6 is suspended and supported by the support mechanism 7. FIG. In this example, since the restraint roll 6 is supported by suspension, it is possible to support the restraint roll 6 in a state where it is always floating with respect to the carry-in route 3, and the entire width of the carry-in route 3 is suppressed. It is possible to secure the gap g of the minimum opening width between the rollers 6 .
In addition, as another representative support structure for the suppression roll 6, a facing member 3a having large diameter portions on both axial end peripheral surfaces of the roll body of the suppression roll 6 and facing the suppression roll 6 in the carry-in path 3 The large-diameter portion may be brought into contact with the large-diameter portion of the roll body to secure a gap g of the minimum opening width between the portion of the roll body other than the large-diameter portion and the opposing member 3a.

Furthermore, as a representative mode of the support mechanism 7, there is a mode in which the restraint roll 6 has hollow portions 7a at both ends thereof and projections 7b on the shredder housing 1 side. At this time, as a typical configuration example of the restraining roll 6, there is a mode in which the restraining roll 6 is a hollow cylindrical roll, and the inner diameter portions facing both ends of the cylindrical roll are hollow.
Further, as another representative mode of the support mechanism 7, the restraint roll 6 is a solid cylindrical roll, has protrusions 7b at both ends thereof, and has a hollow portion 7a on the shredder housing 1 side. mentioned.

As shown in FIG. 1A, the shredder housing 1 has an opening/closing lid 8 that opens and closes the carry-in path 3. The opening/closing lid 8 supports the restraining roll 6 via the support mechanism 7. can be According to this example, it is possible to sufficiently separate the restraint roll 6 from the carry-in path 3 by opening the opening/closing lid 8 .
Furthermore, as a mode that effectively utilizes the opening suppression mechanism 5 of this example, when the suppression roll 6 is retracted and moved, the thickness exceeds a predetermined allowable value corresponding to the maximum thickness of the object S that can be shredded. A detector capable of detecting such a state may be provided.
Furthermore, in this example, the opening suppression mechanism 5 is provided in a part of the carry-in route 3, but it is provided in a part of the carry-in route 3 between the opening suppression mechanism 5 and the shredding mechanism 4, An opening restricting mechanism may be provided for restricting the opening width corresponding to the thickness direction of the shredded material S to a predetermined allowable opening width corresponding to the maximum thickness of the shredded material S that can be shredded. .

◎ Embodiment 1
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail based on embodiments shown in the accompanying drawings.
FIG. 2 shows the overall structure of the shredder according to Embodiment 1. As shown in FIG.
- Overall configuration of the shredder -
In the figure, the shredder 20 has a substantially rectangular parallelepiped shredder housing 21. A recess 21b having a substantially V-shaped cross section is formed in the top 21a of the shredder housing 21, and the bottom of the recess 21b is provided with an inlet 22 into which one or more sheets of paper S as objects to be shredded are inserted, and a carry-in path 23 communicating with the inlet 22 and inclined obliquely downward is provided. A shredding mechanism 24 is arranged in the middle of the shredder housing 23, and a scrap container 27 for containing the shredded scraps Sa of the paper S is arranged so that it can be taken in and out below the shredder mechanism 24 in the shredder housing 21. be.
Here, the carry-in path 23 is divided by a pair of division chutes 23a and 23b on the upper and lower sides. and a cleaning mechanism 26 for cleaning.
In this example, as shown in FIG. 2, the cutter mechanism 25 employs a cross-cut method in which paired bladed drums 31 and 32 are used as cutter elements. By inserting the sheet S through the meshing area, the sheet S is simultaneously shredded vertically and horizontally in a direction (longitudinal direction) along the conveying direction of the sheet S and in a crossing direction (horizontal direction) substantially orthogonal thereto. Incidentally, the cutter mechanism 25 is not limited to the cross-cut system, and it is a matter of course that a combination of a straight cutter and a cross-cutter may be used.
The cleaning mechanism 26 is provided in a region different from the meshing region of the drums 31 and 32 with blades, and serves as a scraping member for scraping off the shreds Sa adhering to the periphery of the drums 31 and 32 with blades. Scrapers 41 and 42 are provided. Here, as the scrapers 41 and 42, plate members made of a high-strength material such as carbon steel are used.
In particular, in the present embodiment, a noise reduction mechanism 80 as an opening suppression mechanism that suppresses the width of the opening corresponding to the thickness direction of the sheet S is provided in the carry-in path 23 near the inlet 22 .
2, reference numeral 50 denotes a driving device for driving the cutter mechanism 25 of the shredding mechanism 24;
is an operation panel for operating the shredder 20 .

-Structure of noise reduction mechanism-
In this example, the noise reduction mechanism 80, as shown in FIGS. In order to reduce noise such as fluttering noise, an opening/closing cover 91 as an opening/closing lid is provided in a part of the upper compartment chute 23a so as to be able to be opened and closed, and a silent roll 81 as a suppressing roll is incorporated in the opening/closing cover 91. It is what I did.
Here, the opening/closing cover 91 has a support bracket 92 fixed to a part of the upper partition chute 23a, and is attached to the support bracket 92 so as to be openable and closable around a spindle 93. As shown in FIG. In this example, the opening/closing cover 91 constitutes the recess 21b of the shredder housing 21 when the opening/closing cover 91 is closed.

In this example, a long rectangular attachment hole 94 extending along the width direction intersecting the carry-in direction of the sheet S is formed in a portion of the opening/closing cover 91 facing the carry-in path 23 . A silent roll 81 is installed in the facing portion so as to face the lower section chute 23b.
In this example, the silent roll 81 is made of a suitable material such as resin or metal and is configured as a hollow cylindrical pipe with both ends opened, and its axial dimension is selected corresponding to the width dimension of the carry-in path 23 . . As the support mechanism 82 for the silent roll 81, the openings at both ends of the hollow hollow portion 83 of the silent roll 81 are used as supported portions, and both longitudinal direction side walls 95 of the opening/closing cover 91 serve as supporting portions for the silent roll 81, respectively. Projections 84 protruding inside the roll 81 (corresponding to the cavity 83 side) are provided, and by arranging the projections 84 in openings at both ends of the silent roll 81 with play, the silent roll 81 is suspended and supported. ing. Incidentally, the projecting body 84 is not limited to a pin, and a fastener such as a screw may be used.
Furthermore, when the opening/closing cover 91 is closed, the silent roll 81 secures an opening of a gap g as a predetermined minimum opening width between the silent roll 81 and the lower compartment chute 23b. Here, the gap g may be selected as appropriate, but assuming a dimension through which one sheet of paper S having a basis weight of about 60 to 100 g can pass, it should be about 0.1 mm (0.08 to 0.12 mm). is selected. Note that the gap g is not limited to one sheet S, and it is of course possible to assume a dimension that allows passage of a number of sheets S that is less than the upper limit number of sheets.

- Operation of the noise reduction mechanism -
Next, the operation of the noise reduction mechanism 80 used in this embodiment will be described.
First, as shown in FIG. 4A, for example, when one sheet of paper S having a thickness thinner than the gap g is carried into the carry-in path 23 from the input port 22, the paper S passes through the silent roll 81 and the lower compartment. It passes through the opening of the gap g between the chute 23b and reaches the shredding mechanism 24. - 特許庁
At this time, one sheet S moves along the lower section chute 23b and is carried in while leaving a minute gap between itself and the silent roll 81. As shown in FIG. In such a carry-in process, even if the leading edge of the paper S is bent or slightly curled, there is a possibility that the leading edge of the paper S will come into contact with the silent roll 81. Since the contact portion has a curved surface, the leading edge of the sheet S is smoothly guided to the opening of the gap g of the silent roll 81, and there is no concern that the opening of the gap g of the silent roll 81 is clogged.
In this state, when the paper S is shredded by the shredding mechanism 24, the shredding sound of the shredding mechanism 24 is transmitted through the introduction path 23 and directed toward the inlet 22. An opening of a gap g narrower than other portions is formed by the silent roll 81 and the lower section chute 23b in the middle, and most of the opening of the gap g is occupied by the paper S. Therefore, the opening of the gap g between the silent roll 81 and the lower compartment chute 23b leaves only a small gap due to the existence of the sheet S, and the shredding sound of the shredding mechanism 24 is greatly attenuated in the small gap. do.
In addition, since part of the non-shredded portion of the paper S located downstream in the carry-in direction passes through the opening of the gap g of the silent roll 81, when the paper S is shredded, Even if the edge of the sheet S tries to flutter in the carry-in path 23, the amount of fluttering of the sheet S is suppressed by the opening of the gap g, and noise due to fluttering of the trailing edge of the sheet S is less likely to occur.

Further, in the case of a plurality of sheets S having a thickness equal to or greater than the gap g, as shown in FIG. When passing through the opening of the gap g of the silent roll 81, the silent roll 81 is carried in toward the shredding mechanism 24 along the lower section chute 23b of the carry-in path 23 while the silent roll 81 is retracted.
At this time, it is possible to increase the surface rigidity of the plurality of sheets S even if the surface rigidity of one sheet S is weak. For this reason, the silent roll 81 presses the paper S with the urging force of the sinusoidal component of its own weight. If the silent roll 81 is set in advance to be movable in the retreating direction, the sheet S can pass through the opening of the gap g of the silent roll 81 while the silent roll 81 is being retreated. In particular, in this example, since the silent roll 81 is suspended and supported with play by the support mechanism 82 (cavity 83, protrusion 84), the evacuation movement locus of the silent roll 81 can be secured in an arbitrary direction. , and the silent roll 81 is easily retracted by following the pushing-up force from the sheet S.
In addition, since the silent roll 81 freely rotates following the carrying operation of the sheet S, there is no fear that the carrying operation of the sheet S is impaired by the silent roll 81 .
In this state, when the paper S is shredded by the shredding mechanism 24, the shredding sound of the shredding mechanism 24 is transmitted through the carry-in path 23 and directed to the inlet 22 side. Since the sheet S with high surface rigidity moves in the retracting direction A as the sheet S passes, the width of the opening between the silent roll 81 and the lower partition sheet 23b varies depending on the thickness of the sheet S. , and the sheet S is arranged in a state in which the opening between the retracted silent roll 81 and the lower section chute 23b is blocked. For this reason, since the opening between the silent roll 81 and the lower compartment chute 23b is sealed with the paper S, most of the shredding noise by the shredding mechanism 24 occurs at the silent roll 81 portion of the carry-in path 23. There is little concern that it will be blocked and leak to the outside from the inlet 22 of the carry-in route 23 . In addition, even if the trailing edge of the paper S flutters in the carry-in path 23 when the paper S is shredded by the shredding mechanism 24, the motion of the paper S is suppressed by the silent rollers 81, so that the trailing edge of the paper S is cut. Fluttering in the carry-in route 23 is rare, and noise associated with fluttering is less likely to occur.

Further, in the present embodiment, as shown in FIG. 5, the silent roll 81 of the noise reduction mechanism 80 moves following the opening of the opening/closing cover 91. Even if the paper S is jammed in the carry-in path 23, it is possible to easily remove the jammed paper S.

Note that the noise reduction mechanism 80 is not limited to the mode in which the hollow cylindrical silent roll 81 is suspended and supported. 4 may be adopted.
◎ Mode of deformation 1-1
In this example, as shown in FIGS. 6(a) and 6(b), the lower section chute 23b has a plate-like chute body on both sides in the width direction, which is stretched toward both ends in the axial direction (longitudinal direction) of the silent roll 81. A stepped portion 103 projecting outward in the width direction with a step is provided as a projecting portion, and a vertical wall portion 104 is provided at the outer end in the width direction of the stepped portion 103 so that both ends of the silent roll 81 can come into contact. It is designed to
For this reason, in this example, the silent roll 81 is arranged such that the peripheral surfaces of both ends in the axial direction are in contact with the stepped portions 103 of the lower compartment chute 23b, and there is a gap between the lower compartment chute 23b and the main body of the lower compartment chute 23b. The opening of g is secured. Here, the gap g is selected to be approximately 0.1 mm (0.08 to 0.12 mm), assuming a dimension that allows passage of one sheet of paper S having a basis weight of approximately 60 to 100 g. In addition, the stepped portion 103 only needs to have a receiving surface capable of receiving the peripheral surfaces of both ends in the axial direction of the silent roll 81, and the width of the receiving surface is selected to be about 5 mm (4 to 6 mm), for example. It is As the support mechanism 82 for the silent roll 81, a combination of a hollow portion 83 and projections 84 is employed.

◎ Mode of deformation 1-2
In this example, as shown in FIGS. 6(c) and 6(d), as the shape of the silent roll 81, the roll main body 81a is formed of a small diameter portion having a predetermined small diameter d1, and both ends of the roll main body 81a in the axial direction are formed. A large diameter portion 81b having a diameter d2 larger than the small diameter d1 is formed on the peripheral surface of the roller body 81a of the silent roll 81 and the lower side of the roll body 81a of the silent roll 81 by bringing the large diameter portion 81b into contact with the chute body of the lower compartment chute 23b. An opening of the gap g may be secured between the partition chute 23b and the chute main body. In this example, as the lower partition chute 23b, vertical wall portions 105 are provided at both width direction ends of the flat plate-like chute main body so that both axial ends of the silent rolls 81 can come into contact with each other. A support mechanism 82 (cavity 83, protrusion 84) may be provided between the wall portion 105 and the wall portion 105. FIG.

◎ Form of deformation 1-3
In this example, as shown in FIG. 7A, as a support mechanism 82, recesses 85 having, for example, a circular cross-section as hollow portions are formed at both ends of a solid cylindrical silent roll 81. Protrusions 84 are provided on both longitudinal side walls 95, and the protrusions 84 are arranged with play in the recesses 85 so that the silent roll 81 is suspended and supported. The cross-sectional shape of the concave portion 85 is not limited to a circular shape, and may be appropriately selected from an elliptical shape, a sector shape, an elongated hole shape, and the like.
◎ Transformation form 1-4
In this example, as shown in FIGS. 7B and 7C, as a support mechanism 82, projecting bodies 86 projecting outward are provided approximately at the center of both ends of a solid cylindrical silent roll 81. A recess 87 having, for example, a circular cross-section as a cavity recessed in the projecting direction of the protrusion 86 is provided on both longitudinal direction side walls 95, and the protrusion 86 is arranged in the recess 87 with play to support the silent roll 81 in a suspended manner. It is designed to In this example, the recess 87 is formed in a shape having an inner diameter smaller than the outer diameter of the silent roll 81 . In this example, the concave portion 87 is formed as a hollow portion, but the cross-sectional shape thereof is not limited to a circular shape, and may be appropriately selected from an elliptical shape, a sector shape, an elongated hole shape, or the like. A hole may be provided.

◎Embodiment 2
FIG. 8(a) is an explanatory diagram showing the main part of the shredder according to the second embodiment.
In the figure, the basic configuration of the shredder 20 is substantially the same as that of the first embodiment, and includes a carry-in path 23 inclined obliquely downward from the inlet 22, and a noise reduction mechanism 80 is installed in the middle of the carry-in path 23. However, the noise reduction mechanism 80 is different from that of the first embodiment. Components similar to those of other embodiments are denoted by similar reference numerals, and detailed descriptions thereof are omitted here.
-Structure of noise reduction mechanism-
In the present embodiment, the noise reduction mechanism 80 employs a silent roll 81 and a support mechanism 82 (cavities 83 and protrusions 84) in substantially the same manner as in the first embodiment. Focusing on the fact that the silent roll 81 moves along with the thickness of the paper S, unlike the form 1, a detector that detects the presence or absence of a thickness abnormality in which the thickness of the paper S exceeds a predetermined upper limit is provided. It is an addition.
A pressure sensor 110 whose resistance changes according to the pressure is used as a sensor to be taken into the detector, and a plate which can swing around a swing fulcrum 112 is used as a member interlocking with the movement of the silent roll 81 . A spring 111 is provided, and the silent roll 81 is pressed against the sheet S side by the plate spring 111 . When the thickness of the paper S changes, the silent roll 81 moves along with the thickness of the paper S, and the plate spring 111 swings with this movement. change) is detected by the pressure sensor 110 .
Further, as a signal processing system of the detector, for example, as shown in FIG. A comparator 116 is connected to a part where 110 and reference resistor 115 are divided. As a result, the pressure change by the pressure sensor 110 can be grasped, and the upper limit value of the thickness of the sheet S can be determined by setting a predetermined threshold value in the comparator 116 . An operational amplifier may be used instead of the comparator 116 as the signal processing system of the detector.

- Operation of the noise reduction mechanism -
According to the present embodiment, the noise reduction mechanism 80 operates in the same manner as in the first embodiment, for example, when shredding one sheet S, the noise reduction mechanism 80 between the silent roll 81 and the lower section chute 23b When a plurality of sheets of paper S are to be shredded while passing through the opening of the gap g, the opening of the gap g between the silent roll 81 and the lower compartment chute 23b is pushed to widen the paper. Since S passes through, the silent roll 81 moves from the position indicated by the dotted line in the retraction direction indicated by the solid line.
Noise reduction processing is performed in accordance with such behavior of the silent roll 81 .
Further, in the present embodiment, as shown in FIG. 9, normal shredding control processing (when the paper S is carried into the carry-in path 23 is detected by a position detector (not shown) (for example, using a paper presence/absence sensor) Then, in addition to the process of starting the driving of the shredding mechanism 24), there is a safety measure that does not perform the shredding process when the thickness of the sheet S carried in is abnormally thick.
That is, as shown in FIG. 9, in order to check whether or not the thickness of the sheet S exceeds a predetermined upper limit value, the detector for detecting the thickness abnormality of the sheet S is monitored. For example, when the output of the detector is turned ON, it is detected that the thickness of the sheet S carried in is abnormally thick. A warning is displayed on the display of
As shredding control of the shredder, generally, the load current of the driving motor 51 is measured, and when the load current exceeds a predetermined threshold value, the shredding mechanism 24 is reversed and the paper S is ejected from the input port 22. In this method, a jam accident of the paper S exceeding the shredding ability and a seizure of the drive motor 51 are prevented. However, even if such a control method is adopted, there is a concern that the shredding mechanism 24 may be jammed with the paper S when the paper S is ejected. It is effective to adopt a method and determine whether or not the shredding mechanism 24 is driven to shred based on the detection result.
In this example, the detector (equipped with the pressure sensor 110) and the detector for monitoring the load current are used as thickness detectors of the sheet S, and the thickness d of the sheet S is determined in advance within a specified value. The shredding mechanism 24 is operated in the high-speed mode if the thickness is equal to or less than the threshold value dth, and is switched to the low-speed mode if the thickness d of the sheet S exceeds the threshold value dth within the specified device.

◎Embodiment 3
FIG. 10 shows the essential parts of the shredder according to the third embodiment.
In the figure, the basic configuration of the shredder 20 is substantially the same as that of the first embodiment, and includes a noise reduction mechanism 80 in the middle of the carry-in path 23 between the inlet 22 of the shredder housing 21 and the shredding mechanism 24. However, unlike the first embodiment, an opening restricting mechanism 120 is provided closer to the shredding mechanism 24 than the opening restricting mechanism 80 in the carry-in path 23 . In this example, the aperture regulation mechanism 120 regulates the aperture width corresponding to the thickness direction of the paper S to a predetermined allowable aperture width corresponding to the maximum thickness of the paper S that can be shredded. Components similar to those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and detailed descriptions thereof are omitted here.

-Structure of opening control mechanism-
In the present embodiment, as shown in FIGS. 10, 11 and 13, the opening regulating mechanism 120 extends along the width direction intersecting the carrying direction of the sheet S of the carry-in path 23, and can be thrown into the carry-in path 23. a regulating gate 121 for regulating a predetermined allowable opening width B narrower than the upper limit opening width A corresponding to the maximum thickness dimension of the sheet S, and a regulating gate 121 for regulating the allowable opening width B. and a biasing mechanism 150 biasing the regulation gate 121 positioned by the positioning mechanism 140 toward the positioning position.

<Regulation gate>
In the present embodiment, a slit 28 extending in the width direction intersecting the conveying direction of the paper S is provided in a part of the partitioning chute 23a that partitions the upper side of the carry-in path 23, and a regulation gate 121 is provided along the slit 28. is provided.
In this example, as shown in FIGS. 11 to 13, the regulating gate 121 has a gate body 122 extending in the longitudinal direction of the slit 28 and having a hollow bottomed cross-section and a substantially home base shape. Extensions 123 are formed on both side walls in the vicinity of both ends in the direction, and end caps 124 are used to close the longitudinal ends facing the side walls having the extensions 123 of the gate body 122 . Here, the extensions 123 are formed only on both side walls near the longitudinal ends of the gate body 122, and the end caps 124 are provided. Because.
The regulation gate 121 has a projecting portion 125 projecting into the area of the carrying-in path 23 . The gate body 122 is swingably supported about a support shaft 126 extending along the longitudinal direction toward the shredding mechanism 24 from the center line Lc position in the carry-in direction.
Note that the support shaft 126 may be a partition side wall 29 (a part of the shredder housing 21 may be used as it is, or a separate member attached to a part of the shredder housing 21 may be used to divide both sides of the carry-in path 23 in the width direction. good).

Further, in the present embodiment, as shown in FIG. 13, the tip position of the protruding portion 125 of the regulation gate 121 is located closer to the inlet 22 than the center line Lc of the gate body 122 in the carrying direction of the sheet S. The projecting portion 125 has planar guide surfaces 127 (specifically, 127a and 127b) that extend in a mountain shape with the tip position as a boundary. Note that the tip of the projecting portion 125 is formed as a curved portion 128 with a small radius of curvature rather than a sharp shape.
Furthermore, in the present embodiment, the dimensions are selected so that the protruding portion 125 can be retracted from the area of the carry-in path 23 when the regulation gate 121 swings clockwise about the support shaft 126 . there is
In this example, the width w of the slit 28 in the width direction is set slightly larger than the width dimension of the regulation gate 121 in the width direction as shown in FIG. When the gate ₁₂₁ swings clockwise around the support shaft 126, the rotation locus of the auxiliary line L1 connecting the center of the support shaft 126 of the regulation gate 121 and the tip position of the projecting portion 125 fits within the slit 28. must be selected as
In this example, the back side of the opening edge of the slit 28 of the partitioning chute 23a on the side of the inlet 22 is formed as a hollow portion. There is no concern that the contour portion of the regulation gate 121 other than the projecting portion 125 will interfere with the partitioning chute 23a. A reinforcing flange 23c is formed at the opening edge of the slit 28 of the compartment chute 23a on the shredding mechanism 24 side. Even if this is the case, it suffices if the outer shape portion of the regulation gate 121 other than the projecting portion 125 does not interfere with the reinforcing flange 23c of the partitioning chute 23a.

A preferred configuration example of the regulation gate 121 will now be described.
(1) Tip Position of Protruding Portion 125 As shown in FIG. 13, an auxiliary line L1 connecting the center of the support shaft 126 of the regulation gate 121 and the tip position of the protruding portion ₁₂₅ , and a reference line L in the direction along the carry-in route 23. Assuming that the acute angle between ₀ and 0 is α, the angle α may be appropriately selected, but the moment of the regulation gate 121 due to the lifting force when lifting the tip position of the projecting portion 125 of the regulation gate 121 should be secured to some extent. Therefore, it is preferable to select the angle .alpha. to be 50.degree.
(2) Inclination Angles of Guide Surfaces 127 (127a, 127b) Of the mountain-shaped guide surfaces 127 (127a, 127b) of the projecting portion 125, auxiliary lines La and Lb extending in the inclination direction from the tip position of the projecting portion 125; Let θout and θin be the acute angles between the reference line L ₀ in the direction along the carry-in path 23 , and these angles θout and θin may be appropriately selected. From the viewpoint of guiding S, 60° or less is preferable.
(3) External Shape of Regulating Gate 121 Other than Protruding Portion 125 It is preferable that the outer shape portion of 121 other than protrusion 125 is formed so as not to protrude into the area of carry-in path 23 .
For example, for a portion of the external shape other than the protruding portion 125 that moves directly below the support _shaft 126 as the regulation gate 121 swings, the span of the auxiliary line L2 connecting the external shape portion and the center of the support shaft 126 is , in the direction perpendicular to the reference line _L0 extending from the center of the support shaft 126 along the carry-in route 23 so as not to reach the area of the carry-in route 23 .

<Positioning mechanism>
Further, in the present embodiment, as shown in FIGS. 11 and 12(a) and (b), the positioning mechanism 140 is part of the end caps 124 provided at both ends of the regulation gate 121 in the longitudinal direction. is integrally formed with positioning projections 141 protruding outward at the upper edge corners of the regulation gate 121 away from the support shaft 126, and on the partition side walls 29 that partition both sides of the carry-in path 23 in the width direction. , a positioning notch 142 is formed so that the projection 141 to be positioned is engaged, and the projection 125 of the regulation gate 121 is engaged with the projection 141 to be positioned of the regulation gate 121 by engaging the projection 141 to be positioned in the positioning notch 142. The tip position is positioned at a position corresponding to the allowable opening width B.
In particular, in this example, since the positioning projection 141 is provided at the upper edge corner of the regulating gate 121 away from the support shaft 126, the span between the center of the support shaft 126 and the positioning projection 141 can be set to some extent. It is possible to increase the length, and it is possible to improve the positioning accuracy of the regulation gate 121 by the positioning mechanism 140 as compared with the above-described mode with a short span.

<Forcing Mechanism>
11 to 13, the urging mechanism 150 has a hooking hole in the extended portion 123 of the side wall near the support shaft 126 among the side walls near one end in the longitudinal direction of the regulation gate 121. 151 is opened, and hooking holes 152 are formed in the section side walls 29 that partition both sides in the width direction of the carry-in path 23 at positions separated above the hooking holes 151 of the regulation gates 121, and both hooking holes 151, By hooking both ends of the urging spring 153 on 152, the regulation gate 121 is rotated counterclockwise around the support shaft 126 (in this example, this corresponds to the direction in which the projection 141 to be positioned of the positioning mechanism 140 engages the positioning notch 142). ).
In this example, the biasing mechanism 150 is provided at one end in the longitudinal direction of the regulation gate 121 , but the present invention is not limited to this. It is permissible to set

- Control system -
In the present embodiment, the cutter mechanism 25 of the shredding mechanism 24 controls the driving motor 51 as the driving device 50 based on the control signal from the control device 160 as shown in FIG. It is designed to
In this example, the control device 160 is composed of a microcomputer system including a CPU, RAM, ROM, and input/output ports, and receives operation signals from the operation panel 60 shown in FIG. 2 and detection signals from various sensors at the input/output ports. , the CPU executes a shredding control program (see FIG. 15) pre-installed in the ROM, and sends a predetermined control signal to the driving motor 51 as the driving device 50 of the shredding mechanism 24 via the input/output port. It is designed to

<Various sensors>
In this example, as shown in FIG. 11, the various sensors include a paper presence/absence sensor 161, an excess paper sensor 162, and the like.
Here, the paper presence/absence sensor 161 detects whether or not the paper S has been introduced into the carry-in path 23, and a mechanical limit switch or an optical sensor is used.
Further, the paper excess sensor 162 detects whether or not the paper S introduced into the carry-in path 23 is excessive, and in this example, a microswitch is used. As shown in FIGS. 13 and 14, the microswitch as the paper excess sensor 162 generally incorporates a minute contact mechanism and a snap action mechanism as internal mechanisms in a case 163, and is provided with an actuator 164 outside. It is designed to transmit movement to the internal mechanism. In this example, a rocking piece 130 that rocks with the rocking of the regulation gate 121 of the opening regulation mechanism 120 is provided so as to protrude from the side wall of the gate body 122 on the side of the shredding mechanism 24 . is placed in contact with a microswitch actuator 164 as an excess paper sensor 162 . Then, when the sheet S exceeding the allowable opening width B is loaded into the carry-in path 23, the regulation gate 121 swings by a predetermined amount in the direction against the biasing direction of the biasing spring 153, although the details will be described later. Accordingly, when the swinging piece 130 swings away from the actuator 164 by a predetermined amount, the actuator 164 moves accordingly, and the micro contact mechanism as an internal mechanism contacts with the microswitch. is turned on, and it is detected that the paper S is excessive.

- Shredding control processing of the shredder -
Next, the shredding control process of the shredder according to this embodiment will be described mainly according to the flowchart shown in FIG.
<Normal shredding>
First, after determining that the start switch (not shown) of the operation panel 60 has been turned on, the control device 160 sets the drive conditions of the drive device 50 (for example, the drive speed conditions of the drive motor 51) to a predetermined value. set to something.
In this state, as shown in FIG. 11, when the paper S is put into the inlet 22 of the shredder housing 21, the paper S moves along the carry-in path 23 toward the cutter mechanism 25 of the shredding mechanism 24. do. At this time, when the paper presence/absence sensor 161 detects the presence of the paper S, the detection signal from the paper presence/absence sensor 161 is taken into the controller 160, and in conjunction with this, the drive motor 51 operates the cutter mechanism 25 according to the predetermined drive conditions. A pair of bladed drums 31 and 32 are driven.
Here, as shown in FIG. 13, the regulation gate 121 of the opening regulation mechanism 120 regulates the allowable opening width B at the tip position of the protruding portion 125, so when the thickness of the sheet S is equal to or less than the allowable opening width B , it passes through the regulation gate 121 and reaches the cutter mechanism 25 without lifting the regulation gate 121 .
For this reason, in this example, the paper S is shredded vertically and horizontally by passing through the meshing area of the pair of bladed drums 31 and 32, and the shredded scraps Sa are scraped by the scraper 41 as the cleaning mechanism 26. , 42 from the bladed drums 31, 32 and fall downward.
Then, when the trailing edge of the paper S passes the paper presence/absence sensor 161 and a predetermined time (the time when the shredding process is presumed to have ended) has passed, the control device 160 ends the shredding process. Then, the drive motor 51 is stopped, and the series of shredding control processing ends.

<When excess paper is loaded>
Next, assuming that an excessive amount of paper S thicker than the allowable opening width B is introduced from the inlet 22 into the carry-in path 23, as shown in FIG. A detection signal from the presence/absence sensor 161 is taken into the control device 160, and in conjunction with this, the driving motor 51 drives the paired bladed drums 31 and 32 of the cutter mechanism 25 according to predetermined driving conditions.
At this time, as shown in FIG. 16A, the paper S passes through the regulation gate 121 and reaches the cutter mechanism 25 while leaving a part of the excess paper S. As shown in FIG. As a result, the paper S is pulled into the cutter mechanism 25, and along with this, the surplus paper S blocked by the regulation gate 121 moves along the guide surface 127a of the projection 125 of the regulation gate 121 on the inlet 22 side. It is guided and pulled into the tip position of the projecting portion 125 .
In this state, the regulation gate 121 is lifted upward by the surplus paper S, but the tip position of the projecting portion 125 of the regulation gate 121 is closer to the inlet 22 than the position of the center line Lc in the carrying direction of the paper S. Therefore, it is easy to secure _a long span of the auxiliary line L1 from the center of the support shaft 126 of the regulation gate 121 to the tip position of the projecting portion 125, which is the point of action of the force Fp that lifts the regulation gate 121 upward. , the moment Mp for rotating the regulation gate 121 about the support shaft 126 in the direction against the biasing force Fs of the biasing spring 153 can be easily set large.

More specifically, as shown in FIGS. 13 and 14, in the regulation gate 121, the span between the biasing force Fs of the biasing spring 153 and the center of the support shaft 126 is s1, and the sheet S carried in regulates the span. Assuming that the span between the force Fp for lifting the tip position of the projecting portion 125 of the gate 121 and the center of the support shaft 126 is s2, this example is selected so as to satisfy s2≧2×s1.
In this case, the moment Ms of the biasing force Fs of the biasing spring 153 about the spindle 126 is Fs×s1, while the moment Mp of the force Fp lifting the regulation gate 121 about the spindle 126 is Fp×s2.
Here, as a condition for swinging the regulation gate 151 in the direction against the biasing force Fs of the biasing spring 153, it is necessary that Mp>Ms. Here, since s2≧2×s1, the force Fp for lifting the tip position of the protruding portion 125 of the regulation gate 121 is set to 1/2 or less of the biasing force Fs of the biasing spring 153. It is understood that it is possible to oscillate the .
Therefore, in the case of this example, the excess paper S passes through the regulation gate 121 while swinging the regulation gate 121 in a predetermined direction. At this time, as shown in FIG. 14, when the regulating gate 121 swings in a predetermined direction by a predetermined amount, the swinging piece 130 of the regulating gate 121 moves away from the actuator 164 of the microswitch as the excess paper sensor 162. It swings in the direction by a predetermined amount, and the microswitch is turned on. Then, as shown in FIG. 15, the control device 160 determines that an excessive amount of paper S has been carried in, stops driving the cutter mechanism 25 of the shredding mechanism 24, and rotates the cutter mechanism 25 forward. restrict. Therefore, the situation in which excess paper S is unnecessarily drawn into the cutter mechanism 25 can be quickly resolved, and troubles such as breakage of the cutter mechanism 25 can be avoided.

<When excess paper is discharged>
After the driving of the cutter mechanism 25 is stopped, it is necessary to remove the excess paper S drawn into the cutter mechanism 25.例文帳に追加In this example, as shown in FIG. 16B, the cutter mechanism 25 of the shredding mechanism 24 is driven in reverse (reverse), so that the excess paper S drawn into the cutter mechanism 25 is removed from the carry-in path 23 through the inlet. Drain towards 22.
At this time, the excess paper S ejected from the cutter mechanism 25 is pushed out in the region of the carry-in path 23 on the shredding mechanism 24 side of the regulation gate 121, so that the thickness is close to the upper limit opening width A of the carry-in path 23. , the guide surface 127b of the projecting portion 125 of the regulating gate 121 on the shredding mechanism 24 side. In this state, the excess paper S is guided along the guide surface 127b to the leading end position of the protruding portion 125 and tries to pass through the leading end position of the protruding portion 125 of the regulation gate 121 .
Here, the surplus portion of the excess paper S is guided along the guide surface 127b and at the same time exerts a pressing force in a direction perpendicular to the guide surface 127b. Apply a lifting force. As a result, in addition to the moment due to the force for lifting the regulation gate 121, the moment due to the pressing force acting on the guide surface 127b acts synergistically on the regulation gate 121, and the biasing force Fs by the biasing spring 153 is reduced. As the force for swinging the regulation gate 121 in the direction opposite to the urging direction, it is possible to swing the regulation gate 121 in a state where the force is suppressed to a lesser amount than when excessive paper is loaded.
Therefore, the excess paper S passes through the regulation gate 121 and is ejected from the carry-in path 23 toward the inlet 22 .

Further, in this example, when excess paper S passes through the regulation gate 121 with a thickness close to the upper limit opening width A, the protruding portion 125 of the regulation gate 121 moves along with the movement of the regulation gate 121 into the carry-in path 23 area. Since the sheet S is retracted from the inside, the excess paper S can easily pass through the regulation gate 121 . In particular, in this example, since the outside portion other than the projecting portion 125 does not protrude into the area of the carry-in path 23 as the regulation gate 121 swings, excess paper S passes through the regulation gate 121. There is no concern that a part of the outer shape of the regulation gate 121 will act as a resistance and get in the way.
When the excess paper S ejected from the carry-in path 23 is removed, the absence of the paper S in the carry-in path 23 is detected by the paper presence/absence sensor 161, and the controller 160 detects the no paper from the paper presence/absence sensor 161. After receiving the detection signal, the driving of the cutter mechanism 25 of the shredding mechanism 24 is stopped, and prohibition of forward rotation driving of the cutter mechanism 25 is released.

◎ Mode of deformation 3-1
FIG. 17 shows a main part of an opening restricting mechanism 120 according to modification 3-1.
In the figure, the basic configuration of the opening regulation mechanism 120 is substantially the same as that of the third embodiment, and includes a regulation gate 121, a positioning mechanism (not shown), and an urging mechanism 150. 3 has a different configuration. Components similar to those of the third embodiment are denoted by the same reference numerals as those of the first embodiment, and detailed descriptions thereof are omitted here.
In this example, the regulating gate 121 is arranged so that the tip position of the protruding portion 125 is positioned closer to the inlet 22 than the center line Lc position in the carrying direction of the sheet S under the condition that it is positioned by the positioning mechanism, in substantially the same manner as in the third embodiment. The protruding portion 125 has a guide surface 127 (127c, 127d) that extends in a mountain shape from the tip position. These guide surfaces 127 (127c, 127d) are formed in a curved surface shape that is convex toward them. Let θout and θin be the acute angles between the direction along 23 and the reference line _L0 , and the relationship θout and θin≦60° is satisfied.
According to this modification, θout and θin can be set to be smaller than in regulation gate 121 (having planar guide surfaces 127 (127a and 127b)) according to the third embodiment. Therefore, even if an excessive amount of paper S collides with the projecting portion 125 of the regulation gate 121, it is preferable in that the guiding performance of the paper S toward the leading end position of the projecting portion 125 is maintained satisfactorily.

DESCRIPTION OF SYMBOLS 1... Shredder housing, 2... Input opening, 3... Carry-in path, 3a... Opposing member, 4... Shredding mechanism, 5... Opening suppression mechanism, 6... Suppression roll, 7... Support mechanism, 7a... Hollow part, 7b... Protrusions, 8... Opening and closing lid, S... Object to be shredded, Sa... Shredded waste, g... Gap

Claims (9)

a shredder housing having an inlet into which one or more pieces of material to be shredded are inserted and a loading path for carrying in the articles to be shredded that have been inserted into the inlet;
a shredding mechanism provided in the middle of the carry-in path in the shredder housing for shredding an object to be shredded;
One piece of shredded material provided in a part of the carry-in path from the inlet to the shredding mechanism and having at least a predetermined opening width corresponding to the thickness direction of the material to be shredded in the carry-in path. The opening is restricted to the minimum opening width through which the shredded material can pass, and when the shredded material having a thickness dimension equal to or greater than the minimum opening width is brought in, the shredded material is brought in with the opening of the carry-in path blocked. and an opening suppression mechanism that allows
The opening suppressing mechanism is arranged to protrude in the region of the carrying-in path to secure a gap of the minimum opening width, and when an object to be shredded having a thickness dimension equal to or larger than the gap is carried in, the object to be shredded is a restraint roll that retracts and moves according to the thickness of the object to be shredded by contact with the
A supported portion is provided at both ends of the restraint roll, a support portion is provided in the shredder housing so as to face the supported portion, and a hollow portion is provided in either the support portion or the supported portion. In addition, a projection extending in the axial direction of the restraining roll is formed on the other side, the projection is disposed in contact with the cavity with play, and the restraining roll is retracted in an arbitrary direction. and a support mechanism for movably hanging and supporting the shredder. The shredder according to claim 1,
The restraint roll has large-diameter portions on the peripheral surfaces of both axial end portions of the roll body, and the large -diameter portions are brought into contact with opposing members facing the restraint rolls in the carry-in path. A shredder characterized in that a gap of the minimum opening width is secured between a portion other than the large-diameter portion and the facing member. The shredder according to claim 1 ,
The shredder, wherein the support mechanism has the hollow portions at both ends of the restraining roll, and has the protrusions on the shredder housing side. The shredder according to claim 1 ,
The shredder is characterized in that the restraint rolls are hollow cylindrical rolls, and inner diameter portions facing both end portions of the cylindrical rolls serve as the hollow portions. The shredder according to claim 1 ,
The shredder is characterized in that the restraint roll is a solid cylindrical roll, has the protrusions at both ends thereof, and has a cavity on the shredder housing side. The shredder according to claim 1 ,
The shredder is characterized in that the shredder housing has an opening/closing lid that opens and closes the carry-in path, and the restraining roll is supported by the opening/closing lid via the support mechanism. The shredder according to claim 1 ,
A shredder comprising a detector capable of detecting a state in which a predetermined allowable value corresponding to a maximum shredable thickness of an object to be shredded is exceeded when the restraint roll is retracted. The shredder according to claim 1 ,
An opening provided in a part of the carrying-in path between the opening restraining mechanism and the shredding mechanism, and having an opening width corresponding to the thickness direction of the material to be shredded, which is the maximum thickness of the material to be shredded. A shredder characterized by comprising an opening restricting mechanism for restricting to a predetermined allowable opening width corresponding to . One sheet of object to be shredded, which is provided in a part of the carrying-in route from the inlet to the shredding mechanism and has at least a predetermined opening width corresponding to the thickness direction of the object to be shredded in the carrying-in route. is restricted to the minimum opening width that can pass through, and when an object to be shredded with a thickness dimension equal to or greater than the minimum opening width is carried in, the object to be shredded is carried in with the opening of the carrying-in path blocked. An opening restraint mechanism that allows
It is arranged protruding into the area of the carry-in path to secure the gap of the minimum opening width, and when an object to be shredded with a thickness dimension equal to or larger than the gap is carried in, the object to be shredded comes into contact with the object to be shredded. a restraining roll that retracts and moves according to the thickness of the cut piece;
A supported portion is provided at both ends of the restraint roll, a support portion is provided in the shredder housing so as to face the supported portion, and a hollow portion is provided in either the support portion or the supported portion. In addition, a projection extending in the axial direction of the restraining roll is formed on the other side, the projection is disposed in contact with the cavity with play, and the restraining roll is retracted in an arbitrary direction. and a support mechanism for movably suspended support.

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