JP2019122912A - Shredder and opening regulation mechanism used in the same - Google Patents

Abstract

To suppress a clogging accident accompanied by an excess input of shredded matters without impairing guide performance at input and discharge of the shredded matters to/from a carry-in path of a shredder.SOLUTION: An opening regulation mechanism 5 for regulating an opening width corresponding to a thickness direction of a shredded matter P has: a regulation member 6 for regulating an allowable opening width B at a tip part of a protrusion 8 protruding into a region of a carry-in path 3, and oscillating with a pivot 7 shifted to a shredding mechanism 4 from a center line Lc of the shredded matter P in a carry-in direction as a center; a positioning member 10 which is positioned by abutment of a part of the regulation member 6 thereon so that the regulation member 6 regulates an allowable opening width B; and an energization member 11 for energizing the regulation member 6 to the positioning member 10. The regulation member 6 has a guide face 9 in which a tip position of the protrusion 8 is arranged so as to be shifted to an input port 2 rather than the center line Lc, and a portion 8 continues in a crest shape with the tip position as a boundary. When the regulation member 6 oscillates to a direction in which the regulation member withstands energization force of the energization member 11, the regulation member can retreat from the inside of the region of the carry-in path 3.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a shredder for shredding a material to be shredded, and in particular, in order to prevent a clogging accident caused by excessive introduction of the material to be shredded, a thickness of the material to be shredded in a delivery route of the material to be shredded BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shredder with an improved aperture control mechanism for controlling a longitudinal opening width and an aperture control mechanism used therefor.

Conventionally, as a shredder of this type, for example, the one described in Patent Document 1 has already been provided.
According to Patent Document 1, in a sheet shredding device for inserting a sheet from an input port and feeding it to a cutter that rotates through a guide path following the input port, the guide path and the input port are guide paths The feed direction opening width of the guide path, which is an opening width through which the paper sheet can pass from the insertion port side to the cutter side, is formed to be able to return the paper sheet to the insertion port. A mode is disclosed that is formed narrower than the return direction opening width of the guide path, which is the opening width through which the paper sheets can pass.
In this aspect, the opening width switching means is provided in the middle of the guide path, and the opening width switching means receives the return force acting from the cutter side to the insertion port side to expand the opening width of the guide path. It has a gate lever which can be turned around and which can not turn around a fulcrum receiving a feed force acting from the insertion port side to the cutter side.

Patent No. 3236584 (Embodiment of the invention, FIG. 1)

In the shredder described in Patent Document 1 of this type, when a sheet as a material to be shredded is inserted into the guide path from the insertion port, the opening width is larger than the opening width of the guide path. Since the gate lever of the switching means is not rotatable, the thick sheet of paper passes a part of the gate lever leaving a surplus portion to reach the cutter. As a result, the sheet is drawn into the cutter, and along with this, the surplus sheet blocked by the gate lever passes while compressing the gate lever, and the lead direction of the cutter (corresponding to the spiral direction around the rotation axis) Because the paper is pulled in, the sheets may be fed and may overlap. Under such circumstances, an excessive amount of paper is supplied to the cutter, and in order to prevent the cutter from being damaged, a method of stopping the forward rotation of the cutter urgently is often employed.
After this, in order to take out the paper in the process of shredding, a method of driving the cutter in reverse is often employed. At this time, by reversely driving the cutter, a return force for returning the paper in the middle of shredding to the loading port side is obtained, and the gate lever pivots around the fulcrum to expand the opening width of the guide path to the opening width in the return direction. However, there is a concern that the excess paper passing in a compressed state of the gate lever is clogged in the guide path on the cutter side of the gate lever, making it difficult to pull out.

  The technical problem to be solved by the present invention is to suppress a clogging accident caused by excessive introduction of the chopped material without impairing the guiding property of the shredder into and out of the chopped material into the carry-in path. It is.

  According to a first technical means of the present invention, there is provided a shredder case having an insertion slot for receiving the shredded material and a loading path for carrying the shredded material loaded to the loading slot; A shredding mechanism provided in the middle of the carry-in path for shredding the material to be chopped, and a part of the carry-in path from the input port to the shredding mechanism And an opening restricting mechanism for restricting an opening width corresponding to a thickness direction of the object to be shredded, wherein the opening restricting mechanism is provided along a width direction intersecting the carrying direction of the material to be shredded in the carry-in path. A predetermined allowable opening width narrower than the upper limit opening width corresponding to the maximum thickness dimension of the shredded material which can be introduced into the carry-in path at the tip end position of the protrusion which extends into the area of the carry-in path The shredding machine is restricted and the center line position of the material in the loading direction of the material to be shredded A restricting member pivoting about a fulcrum provided on the other side, a positioning member in which a part of the restricting member is abutted and positioned such that the restricting member restricts the allowable opening width, the positioning member And a biasing member for biasing the regulating member so that a part of the regulating member abuts, and the regulating member has the tip end position of the projecting portion positioned under the condition of being positioned by the positioning member The projecting portion is provided closer to the input port than the center line position in the carrying-in direction of the material to be shredded, the projecting portion has a guiding surface connected in a mountain shape at the front end position, and the regulating member is biased The shredder is characterized in that the projecting portion is retractable from within the area of the carry-in path when it is swung in a direction opposed to the biasing direction of the member.

According to a second technical feature of the present invention, in the shredder having the first technical feature, the shredding mechanism when the regulating member is swung in a direction opposed to the biasing direction of the biasing member. A shredder characterized in that it comprises prohibiting means for prohibiting normal rotation drive by means of
The third technical feature of the present invention, there is provided a shredder having a first or second technical feature, an auxiliary line L ₁ connecting the end position of the fulcrum and the projecting portion of the regulating member, the carry path It is a shredder characterized by satisfying the relation of α ≦ 50 °, where α is an acute angle between the reference line L _{0 in the} direction along and the angle α.
According to a fourth technical feature of the present invention, in the shredder having the first or second technical feature, the projecting portion of the regulating member is a flat or a curved guide surface which is convex outward. It is a shredder characterized by having.
According to a fifth technical feature of the present invention, in the shredder provided with the first or second technical feature, the restricting member is provided at a tip end position of the protrusion of the chevron-shaped guide surface of the protrusion. Assuming that the acute angles between the auxiliary lines La and Lb extending in the tangential direction at the adjacent portions and the reference line L _{0 in the} direction along the carry-in path are θout and θin, the relationship of θout, θin ≦ 60 ° is obtained. It is a shredder characterized by filling.
According to a sixth technical feature of the present invention, in the shredder having the first or second technical feature, when the restricting member swings and the protrusion retracts from the area of the carry-in path, It is a shredder characterized by forming so that outside parts other than the projection part among the regulation members may not project into a field of the carrying-in path.
According to a seventh technical feature of the present invention, in the shredder having the first or second technical feature, the positioning members are provided at both ends in the width direction of the carry-in path, and at both ends in the width direction of the restriction member. It is a shredder characterized by having a positioning part which the to-be-positioned part provided provided contacts.
An eighth technical feature of the present invention is the shredder having the first or second technical feature, wherein the biasing member is hooked to a hook portion provided on a portion other than the projecting portion of the regulating member. A shredder characterized in that the restricting member is urged in a direction in which the restricting member abuts on the positioning member.
According to a ninth technical feature of the present invention, in the shredder having the eighth technical feature, the span between the biasing force by the biasing member and the center of the fulcrum is s1, and the shredded material is carried in It is a shredder characterized by satisfying s 2 × 2 x s 1, where s 2 is a span between the lifting force and the center of the fulcrum, and the tip position of the projection of the regulating member is s 2.

  A tenth technical feature of the present invention is an opening regulating mechanism which is provided in a part of a carry-in path from the inlet to the shredding mechanism and regulates the opening width corresponding to the thickness direction of the material to be shredded. The shredder can extend along the width direction intersecting the carrying direction of the material to be chopped in the carry-in path, and can be introduced into the carry-in path at the leading end position of the protrusion projecting into the area of the carry-in path A fulcrum provided at a position closer to the shredding mechanism than a center line position in the carrying direction of the material to be shredded, which regulates a predetermined allowable opening width narrower than the upper limit opening width corresponding to the maximum thickness dimension of the material And a positioning member in which a portion of the regulation member is abutted and positioned such that the regulation member regulates the allowable opening width, and the positioning member with respect to the positioning member Biasing member which biases the regulating member so that a part thereof abuts The tip end position of the protrusion is provided closer to the input port than the center line position in the loading direction of the material under the condition that the restriction member is positioned on the positioning member, and the protrusion is the protrusion The guide portion has a guide surface connected in a mountain shape at the tip end position, and when the restricting member swings in a direction opposed to the biasing direction of the biasing member, the projection is a region of the carry-in path An opening restricting mechanism characterized by being retractable from the inside.

According to the first technical feature of the present invention, it is possible to suppress a clogging accident caused by excessive introduction of the chopped material without impairing the guiding property of the shredder into and out of the chopped material into the carry-in path. can do.
According to the second technical feature of the present invention, it is possible to minimize the pulling operation of the material to be chopped by the shredding mechanism at the time of overcharging the material to be chopped.
According to the third technical feature of the present invention, when the lifting force acts on the regulating member, the regulating member is rotated in the direction against the biasing force of the biasing member as compared with the aspect without the present configuration. Is easy to secure.
According to the fourth technical feature of the present invention, even if excess shredded material collides with the protrusion of the regulating member, it is easy to guide the shredded material toward the tip end position of the protrusion. it can.
According to the fifth technical feature of the present invention, even if excess shredded material collides with the guide surface of the projecting portion of the regulating member as compared with the embodiment not having the present configuration, the excess shredded material Can be guided to the tip position of the projection without clamping.
According to the sixth technical feature of the present invention, when the protrusion retracts from within the area of the carry-in path in association with the swinging of the restricting member, the outer portion other than the protrusion of the restricting member is within the area of the carry-in path. It is possible to avoid the situation of
According to the seventh technical feature of the present invention, the regulating member can be positioned at a predetermined position without impairing the swinging of the regulating member.
According to the eighth technical feature of the present invention, the biasing member can be easily attached to the regulating member, and the biasing force of the biasing member can be applied to the regulating member.
According to the ninth technical feature of the present invention, the regulating member can be rocked in a state in which the force for lifting the tip end position of the projecting portion of the regulating member is suppressed to 1/2 or less of the biasing force by the biasing member. .
According to the tenth technical feature of the present invention, the shredded material can be introduced into the shredder loading path without impairing the guiding property of the shredded material into the shredder loading path during loading and discharging. It is possible to suppress the clogging accident caused by the excessive injection of

(A) is an explanatory view showing an outline of an embodiment of a shredder to which the present invention is applied, (b) is an explanatory view showing a main part of an opening restriction mechanism of the shredder according to (a), (c) is an opening restriction It is an explanatory view showing operation of a mechanism. FIG. 1 is an explanatory view showing an entire configuration of a shredder according to a first embodiment. FIG. 6 is an explanatory view showing an opening restriction mechanism used in the first embodiment. (A) is explanatory drawing which shows an example of the to-be-positioned part of the positioning mechanism used with the opening control mechanism which concerns on Embodiment 1, (b) demonstrates an example of the positioning part which positions the to-be-positioned part of the positioning mechanism. FIG. It is explanatory drawing which shows the principal part of the opening control mechanism which concerns on FIG. It is explanatory drawing which shows operation | movement of the opening control mechanism which concerns on FIG. It is a flowchart which shows the shredding control processing process of the shredder which concerns on Embodiment 1. FIG. (A) is explanatory drawing which shows operation | movement of the opening control mechanism which concerns on Embodiment 1 at the time of sheet insertion, (b) is explanatory drawing which shows operation | movement of the same opening control mechanism at the time of sheet discharge. It is explanatory drawing which shows the principal part of the opening control mechanism which concerns on the form 1 of a comparison. (A) is explanatory drawing which shows operation | movement of the opening restriction mechanism based on the form 1 of the comparison at the time of paper insertion, (b) is explanatory drawing which shows operation | movement of the same opening restriction mechanism at the time of paper discharge. It is an explanatory view showing the important section of the opening control mechanism concerning a first modification of a modification. (A) is explanatory drawing which shows the principal part of the shredder based on Embodiment 2, (b) is explanatory drawing which shows the example of a support structure of the silent roll used for the noise reduction mechanism shown to (a). FIG. 14 is an explanatory view showing a state in which the noise reduction mechanism according to the second embodiment is opened.

Outline of Embodiment FIG. 1A shows an outline of an embodiment of a shredder to which the present invention is applied.
In the figure, the shredder has a shredder case 1 having a loading slot 2 for loading the shredded material P and a loading path 3 for loading the shredded material P loaded to the loading slot 2; A shredding mechanism 4 provided in the middle of the carry-in path 3 in 1 for shredding the material P, and a portion of the carry-in path 3 from the input port 2 to the shredding mechanism 4 And an opening restricting mechanism 5 for restricting an opening width corresponding to the thickness direction of the material P to be shredded in the path 3.
In this example, the opening restriction mechanism 5 extends along the width direction intersecting the loading direction of the material P to be shredded in the loading path 3 as shown in FIG. Restricting a predetermined allowable opening width B narrower than the upper limit opening width A corresponding to the maximum thickness dimension of the material to be chopped P which can be introduced into the carry-in path 3 at the tip position of the projecting portion 8 projecting inward; A restricting member 6 swinging around a fulcrum 7 provided closer to the shredding mechanism 4 than a position of a center line Lc in the carrying-in direction of the material to be shredded P, and a restricting member 6 restrict the allowable opening width B A positioning member 10 in which a part of the restriction member 6 is in contact and positioned, and a biasing member 11 in which the restriction member 6 is biased so that a part of the restriction member 6 is in contact with the positioning member 10; The position of the tip end of the protrusion 8 is limited under the condition that the restricting member 6 is positioned on the positioning member 10. The projecting portion 8 is provided with a guide surface 9 (specifically 9a, 9b) connected in a mountain shape at the tip end position side closer to the insertion port 2 than the center line Lc position in the carrying direction of the shredded material P When the restricting member 6 swings in a direction against the urging direction of the urging member 11, the projecting portion 8 can be retracted from the area of the carry-in path 3.

In such a technical means, the opening regulating mechanism 5 shreds an excess of the allowable opening width B, which is narrower than the upper limit opening width A, when an excess material to be shredded P is introduced to the inlet 2. The opening width is regulated so as not to be drawn into the mechanism 4.
Here, the fulcrum 7 of the regulating member 6 is provided closer to the shredding mechanism 4 than the position of the center line Lc in the carrying-in direction of the material to be shredded P. This is because when the excess shredding mechanism 4 is pulled back into the shredding mechanism 4 and the operation of the shredding mechanism 4 is stopped, the shredding mechanism 4 is operated reversely (reversely driven). It is considered to make it easy to lift the regulating member 6 under the condition that P contacts the regulating member 6.
Further, the positioning member 10 may be any member as long as a part of the regulating member 6 abuts to position the movement of the regulating member 6 in the biasing direction by the biasing member 11. A part may be used, and a separate member from the dividing member may be used.
Further, the attachment structure of the biasing member 11 may be provided with a hook portion of the biasing member 11 at a part of the regulating member 6, or may be appropriately selected such as being wound around the fulcrum 7 of the regulating member 6. No problem.

Further, under the condition that a part of the restricting member 6 is in contact with the positioning member 10, the tip end position of the projecting portion 8 of the restricting member 6 is disposed closer to the inlet 2 than the center line Lc position of the restricting member 6. . This makes it easy to secure a long span from the fulcrum 7 of the restricting member 6 to the force for lifting the restricting member 6 upward, whereby the restricting member 6 with the urging member 11 around the fulcrum 7 The moment to be rotated in the direction against the biasing force can be easily set large.
Furthermore, since the projecting portion 8 has a mountain-shaped guide surface 9 (9a, 9b) at the end position, the material P to be shredded from the inlet 2 is a guide surface on the inlet 2 side. The shredded object P which is guided to the tip end position of the regulating member 6 along 9a and reversely traveled from the shredding mechanism 4 is moved to the tip end position of the regulating member 6 along the guide surface 9b on the shredding mechanism 4 side. You will be guided.
Furthermore, when the restricting member 6 swings in a direction that opposes the urging direction of the urging member 11, the projecting portion 8 needs to be able to retract from the area of the carry-in path 3. If the protruding portion 8 of the restricting member 6 is projected into the area of the carry-in path 3, the shredding mechanism 4 is clogged on the side of the restricting member 6 in the carry-in path 3 during reverse operation of the shredding mechanism 4. There is a concern that the restriction member 6 may get in the way when the shredded material P (the thickness of the shredded material P often reaches the upper limit opening width A in many cases) becomes an obstacle, so avoid this It is the purpose.

Next, representative aspects or preferable aspects of the shredder according to the present embodiment will be described.
First, as a typical aspect of the shredder according to the present embodiment, when the regulating member 6 is swung in a direction opposed to the biasing direction of the biasing member 11, the normal rotation drive by the shredding mechanism 4 is prohibited The aspect provided with a prohibition means is mentioned. In this example, when the restricting member 6 swings in a direction that opposes the urging direction of the urging member 11 (when, for example, a material P having a thickness equal to or larger than the allowable opening width B is inserted) Since the normal rotation operation of the shredding mechanism 4 is prohibited, the pulling operation of the material P to be shredded to the shredding mechanism 4 is stopped early. For this reason, there is less concern that the jammed material to be chopped P is tightly packed in the carry-in path 3 and the shredding mechanism 4 can be reversely operated to easily pull out the material to be shredded P.

Further, a preferred embodiment of the protrusion 8 of the regulating member 6, as shown in FIG. 1 (b), an auxiliary line L ₁ connecting the fulcrum 7 of the regulating member 6 and the front end position of the projecting portion 8, conveyance path 3 Assuming that the acute angle with the reference line L _{0 in the} direction along the line is α, an aspect satisfying the relationship of α ≦ 50 ° may be mentioned. Here, the angle α between the extension line L ₁ and the reference line L ₀ connecting the end position of the fulcrum 7 and the projection 8 of the regulating member 6 is not safe to properly selected, as in this example, regulation In order to secure the moment of the regulating member 6 due to the lifting force when lifting the tip end position of the projecting portion 8 of the member 6, to make the span between the fulcrum 7 and the lifting force a certain length, It is preferable to select.

  Furthermore, as a preferable guide surface 9 (9a, 9b) of the protrusion 8 of the regulating member 6, as shown in FIG. 1 (b), a mode having a flat guide surface 9 (9a, 9b) is representative. However, the present invention is not limited to this, and the guide surface 9 (9a, 9b) may be formed in a curved surface shape that is convex toward the outside, or a flat surface portion and a curved surface portion may be combined. It does not matter.

Furthermore, as another preferable aspect of the projecting portion 8 of the regulating member 6, as shown in FIG. 1 (b), of the projecting portion 8 of the mountain shaped guiding surfaces 9 (9a, 9b) of the projecting portion 8 Assuming that the acute angles between the auxiliary lines La and Lb extending in the tangential direction at the portion adjacent to the tip position and the reference line L _{0 in the} direction along the carry-in path 3 are θout and θin, θout, θin ≦ 60 ° The aspect which satisfy | fills the relationship of is mentioned. Here, the auxiliary lines La and Lb are selected in consideration of not only the aspect in which the guide surfaces 9 (9a, 9b) are flat, but also the aspect in which the guide faces 9 (9a, 9b) are curved. The auxiliary line La, the angle θout between Lb and the reference line L _0, but θin is no problem with properly selected, from the viewpoint for guiding the object to be shredded matter P toward the tip position of the protrusion 8 For example, 60 ° or less is preferable. In an aspect in which the guide surface 9 (9a, 9b) has an angle of more than 60 °, when a part of the excess shredded material P collides with the guide surface 9, the part of the shredded material P is the guide surface Concerns arise that 9 will be blocked.

  Further, as a preferable aspect of the regulating member 6, when the regulating member 6 swings and the projecting portion 8 retracts from the area of the loading path 3, the outer portion of the regulating member 6 other than the projecting portion 8 is the loading path There is a mode in which it is formed so as not to project into the area 3. In this example, when the restricting member 6 swings against the urging force of the urging member 11, it is necessary to retract the projecting portion 8 of the restricting member 6 from the area of the carry-in path 3. The external portion which is not the projecting portion 8 does not project into the area of the carry-in path 3 with the swinging of

  In addition, as a typical aspect of the positioning member 10, there is provided an aspect having positioning portions provided at both ends in the width direction of the carry-in path 3 and in contact with positioning portions provided at both ends in the width direction of the regulating member 6. In this example, the positioning member 10 is installed so as not to disturb the swing of the regulating member 6.

Furthermore, as a typical attachment structure of the biasing member 11, the biasing member 11 is hooked on a hook portion provided in a portion other than the projecting portion 8 of the regulating member 6, and biases the regulating member 6 in a direction in contact with the positioning member 10. The thing is mentioned. In this embodiment, the biasing member 11 is hooked on a part of the regulating member 6 to bias the regulating member 6 in a predetermined direction.
In the present embodiment, as a preferred layout of the projecting portion 8 of the regulating member 6, as shown in FIG. 1 (b), the span between the biasing force by the biasing member 11 and the center of the fulcrum 7 is s1, Assuming that the span between the lifting force and the center of the fulcrum 7 is s2 by the chopped material P, the aspect satisfying s282 × s1 can be mentioned. In this embodiment, in a mode in which the biasing member 11 is hooked on a part of the regulating member 6, the positional relationship between the action point of the biasing member 11 and the tip position of the projecting portion 8 of the regulating member 6 is devised. In this embodiment, the lifting force by the material S to be swung is suppressed to 1/2 or less of the biasing force of the biasing member 11.

実 施 Embodiment 1
Hereinafter, the present invention will be described in more detail based on the embodiments shown in the attached drawings.
FIG. 2 shows the entire configuration of the shredder according to the first embodiment.
-Overall configuration of shredder-
In the same figure, the shredder 20 has a substantially rectangular parallelepiped shredder housing 21. The top 21a of the shredder housing 21 forms a recess 21b having a substantially V-shaped cross section, and a bottom of the recess 21b. The opening is provided with an insertion slot 22 into which one or more sheets P as an object to be shredded are introduced, and a conveying path 23 communicating with the insertion slot 22 and inclined obliquely downward is provided. The shredding mechanism 24 is disposed in the middle of the shredder mechanism 23, and the waste container 27 in which shreds Pa of the sheet P are accommodated can be taken out and put out below the shredding mechanism 24 in the shredder housing 21. is there.
Here, the carry-in path 23 divides the upper side and the lower side by a pair of dividing chutes 23a and 23b, and the shredding mechanism 24 further includes a cutter mechanism 25 for shredding the sheet P and the cutter mechanism 25. And a cleaning mechanism 26 for cleaning.
In this example, as shown in FIG. 2, the cutter mechanism 25 adopts a cross-cut method in which the bladed drums 31 and 32 having a pair configuration are used as cutter elements, and the cutter mechanism 25 has a pair of bladed drums 31 and 32. By inserting the sheet P into the meshing area, the sheet P is shredded simultaneously in the vertical and horizontal directions in the direction (longitudinal direction) along the carrying-in direction of the sheet P and the cross direction (horizontal direction) substantially orthogonal thereto. The cutter mechanism 25 is not limited to the cross-cut method, and of course, a combination of a straight cutter and a cross cutter may be used.
Further, the cleaning mechanism 26 is provided in a region different from the meshing region of the bladed drums 31 and 32 of the pair configuration, and is a scraping member for scraping off the scraps Pa attached to the periphery of the bladed drums 31 and 32. 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, in order to restrict the opening width corresponding to the thickness direction of the sheet P in the carry-in path 23, in a part of the carry-in path 23 between the input port 22 and the shredding mechanism 24. An opening restriction mechanism 80 is provided.
In FIG. 2, reference numeral 50 denotes a driving device for driving the cutter mechanism 25 of the shredding mechanism 24, reference numeral 60.
Is an operation panel for operating the shredder 20.

-Configuration of aperture control mechanism-
In the present embodiment, as shown in FIGS. 3 and 5, the opening restricting mechanism 80 extends along the width direction intersecting the sheet P conveyance direction of the conveyance path 23, and the sheet P which can be input to the conveyance path 23. The restriction gate 81 for restricting the predetermined allowable opening width B narrower than the upper limit opening width A corresponding to the maximum thickness dimension of the and the restriction gate 81 are positioned such that the restriction gate 81 restricts the allowable opening width B The positioning mechanism 100 and a biasing mechanism 110 biasing the restriction gate 81 positioned by the positioning mechanism 100 toward the positioning position are provided.

<Regulation gate>
In the present embodiment, a slit 28 extending in the width direction intersecting with the conveyance direction of the sheet P is provided in a part of the division chute 23 a that divides the upper side of the carry-in path 23. Is provided.
In this example, as shown in FIGS. 3 to 5, the restriction gate 81 has a hollow bottomed gate base 82 having a hollow base and extending in the longitudinal direction of the slit 28. While extending portions 83 are formed on both side walls in the vicinity of both direction ends, both end portions in the longitudinal direction facing both side walls having the extending portion 83 of the gate main body 82 are closed with an end cap 84. Here, the extension 83 is formed only on both side walls in the vicinity of both ends in the longitudinal direction of the gate main body 82 and the end cap 84 is applied to increase the bending rigidity while reducing the weight of the restriction gate 81. It is for.
The restricting gate 81 has a projecting portion 85 projecting in the area of the carry-in path 23, and restricts the allowable opening width B described above at the tip end position of the projecting portion 85. The gate main body 82 is swingably supported about a pivot 86 extending along the longitudinal direction toward the shredding mechanism 24 than the position of the center line Lc in the loading direction.
Note that the support shaft 86 is a section side wall 29 that divides both sides in the width direction of the carry-in path 23 (a part of the shredder case 21 may be used as it is, or a separate member attached to a part of the shredder case 21 Good) fixed.

Further, in the present embodiment, the tip end position of the projecting portion 85 of the regulation gate 81 is closer to the insertion port 22 than the center line Lc position of the sheet P in the loading direction in the gate main body 82 as particularly shown in FIG. The projecting portion 85 is provided with a planar guide surface 87 (specifically, 87a and 87b) connected in a mountain shape at the end position. The tip of the projecting portion 85 is not sharp and is formed as a curved portion 88 with a small radius of curvature.
Furthermore, in the present embodiment, the projection 85 is selected to have a dimension such that it can be retracted from within the area of the carry-in path 23 when the regulation gate 81 pivots clockwise about the support shaft 86. There is.
In this example, the width dimension w of the slit 28 in the short direction is set to be slightly larger than the width dimension of the restriction gate 81 in the short direction as shown in FIG. 5, and as shown in FIG. when the gate 81 is swung clockwise about the support shaft 86, the rotation locus of the auxiliary line L ₁ connecting the shaft 86 the center of the regulating gate 81 and the distal end position of the protrusion 85 fits into the slit 28 It is necessary to be selected.
In this example, the rear side of the opening edge on the inlet 22 side of the slit 28 of the section chute 23a is formed as a hollow portion, and even if the restriction gate 81 is swung clockwise about the support shaft 86, There is no concern that the outer portion other than the projecting portion 85 of the regulation gate 81 may interfere with the section chute 23a. Further, a reinforcing flange 23c is formed on the opening edge of the slit 28 of the section chute 23a on the side of the shredding mechanism 24. In this example, the restriction gate 81 pivots clockwise about the support shaft 86 in this example. Even if it does, the external shape part other than the protrusion part 85 of the restriction | limiting gate 81 should just do not interfere with the flange 23c for reinforcement of the division chute 23a.

Here, a preferred configuration example of the regulation gate 81 will be described.
(1) As shown in the distal end position Figure 5 of the protrusions 85, regulating the auxiliary line L ₁ connecting the end position of the support shaft 86 centered protrusion 85 of the gate 81, the reference line L in the direction along the conveyance path 23 _Assuming that the acute angle between ₀ and ₀ is α, the angle α may be appropriately selected, but when lifting the tip position of the projecting portion 85 of the regulation gate 81, the moment of the regulation gate 81 by the lifting force is secured to some extent Preferably, the angle α is selected to be 50 ° or less so as to lengthen the span between the center of the support shaft 86 and the lifting force to some extent.
(2) Inclination angles of the guide surfaces 87 (87a, 87b) Among the mountain-shaped guide surfaces 87 (87a, 87b) of the protrusion 85, auxiliary lines La, Lb extending in the inclination direction from the tip end position of the protrusion 85; Assuming that the acute angles with the reference line L _{0 in the} direction along the carry-in path 23 are θout and θin, these angles θout and θin may be appropriately selected, but the paper is directed toward the leading end position of the projecting portion 85 From the viewpoint of guiding P, 60 ° or less is preferable.
(3) External Shape of the Regulating Gate 81 Other than the Protruding Portion 85 The regulating gate 81 pivots clockwise around the support shaft 86 and retracts from the inside of the area of the carry-in path 23. It is preferable that the outer portion other than the projecting portion 85 among the portions 81 be formed so as not to project into the region of the carry-in path 23.
For example of the outer shape portion other than the protruding portion 85, the portion to be moved directly under the shaft 86 with the swing of the regulation gate 81, the span extension line L ₂ connecting the said outer portion and the support shaft 86 center It may be set in a range not reaching the area of the carry-in path 23 in the perpendicular direction orthogonal to the reference line L ₀ in the direction along the carry-in path 23 from the center of the support shaft 86.

<Positioning mechanism>
Further, in the present embodiment, as shown in FIGS. 3 and 4A and 4B, the positioning mechanism 100 is a part of the end cap 84 provided at both ends in the longitudinal direction of the regulation gate 81, specifically, Is integrally formed on the upper edge corner of the restriction gate 81 on the side away from the support shaft 86 while the positioning projections 101 are integrally formed on the side and the dividing side wall 29 dividing both sides in the width direction of the carry-in path 23 Of the projection 85 of the regulation gate 81 by forming the positioning notch 102 cut out so that the positioning projection 101 is engaged, and engaging the positioning projection 101 of the regulation gate 81 with the positioning notch 102. The tip position is positioned at a position corresponding to the allowable opening width B.
In particular, in the present embodiment, since the positioning projection 101 is provided at the upper edge corner of the side of the regulation gate 81 away from the support shaft 86, the span between the center of the support shaft 86 and the positioning projection 101 is to some extent This makes it possible to increase the positioning accuracy of the restriction gate 81 by the positioning mechanism 100 compared to the above-described embodiment in which the span is short.

<Urge mechanism>
Furthermore, in the present embodiment, as shown in FIGS. 3 to 5, the biasing mechanism 110 is hooked on the extension 83 of the side wall near the support shaft 86 among the side walls near one end in the longitudinal direction of the regulation gate 81. A hooking hole 112 is formed at a position away from the hooking hole 111 of the regulating gate 81 among the dividing side walls 29 which open both sides of the loading path 23 in the width direction, and both hooking holes 111, By hooking the both ends of the biasing spring 113 to the reference numeral 112, the restriction gate 81 is turned counterclockwise around the support shaft 86 (in this example, it corresponds to the direction in which the positioning projection 101 of the positioning mechanism 100 engages with the positioning notch 102). To the
In this embodiment, although the biasing mechanism 110 is provided on one end side in the longitudinal direction of the regulating gate 81, the present invention is not limited to this. The biasing mechanism 110 is provided on both longitudinal ends of the regulating gate 81, respectively. There is no problem in providing

-Control system-
In the present embodiment, the cutter mechanism 25 of the shredding mechanism 24 controls the drive motor 51 as the drive device 50 based on the control signal from the control device 120 as shown in FIG. It is supposed to
In this example, the control device 120 comprises a microcomputer system including a CPU, a RAM, a ROM and an input / output port, and receives at the input / output port operation signals from the operation panel 60 shown in FIG. 2 and detection signals from various sensors. The CPU executes a shredding control program (see FIG. 7) installed in advance in the ROM by the CPU, and sends a predetermined control signal to the drive motor 51 as the drive device 50 of the shredding mechanism 24 through the input / output port. It is supposed to

<Various sensors>
In the present embodiment, as various sensors, as shown in FIG. 3, a sheet presence sensor 121, a sheet excess sensor 122, etc. may be mentioned.
Here, the sheet presence sensor 121 detects whether or not the sheet P has been fed into the carry-in path 23, and a mechanical limit switch or an optical sensor is used.
Further, the sheet excess amount sensor 122 detects whether the number of sheets P fed into the carry-in path 23 is excessive or not. In this example, for example, a micro switch is used. As shown in FIGS. 5 and 6, the micro switch as the sheet excess sensor 122 generally incorporates a micro contact mechanism and a snap action mechanism as an internal mechanism in the case 123, and is provided with an actuator 124 externally. It is intended to transmit the movement to the internal mechanism. In this example, a swinging piece 90 swinging with the swinging of the regulation gate 81 of the opening regulating mechanism 80 is provided so as to protrude from the side wall of the gate main body 82 on the shredding mechanism 24 side. Are disposed in contact with the micro switch actuator 124 as the paper excess sensor 122. Then, when a sheet P exceeding the allowable opening width B is loaded into the carry-in path 23, the regulation gate 81 swings by a predetermined amount in a direction that opposes the biasing direction of the biasing spring 113, which will be described in detail later. As a result, when the swinging piece 90 swings by a predetermined amount in the direction away from the actuator 124, the actuator 124 moves to follow this and the micro contact mechanism as an internal mechanism contacts and the micro switch Is turned on, and it is detected that the number of sheets P is excessive.

-Shredder shredding control processing-
Next, shredding control processing of the shredder according to the present embodiment will be described mainly according to the flowchart shown in FIG.
<Normal shredding>
First, after determining that the start switch (not shown) of operation panel 60 has been turned on, control device 120 determines the drive condition of drive device 50 (for example, the drive speed condition of drive motor 51) to a predetermined value. Set to something.
In this state, as shown in FIG. 2, when the sheet P is inserted into the insertion port 22 of the shredder housing 21, the sheet P moves toward the cutter mechanism 25 of the shredding mechanism 24 along the carry-in path 23. Do. At this time, when the sheet presence sensor 121 detects the presence of the sheet P, a detection signal from the sheet presence sensor 121 is taken into the control device 120, and the drive motor 51 operates the cutter mechanism 25 according to a predetermined drive condition. The bladed drums 31, 32 are driven.
Here, as shown in FIG. 5, when the thickness of the sheet P is equal to or less than the allowable opening width B, the restriction gate 81 of the opening restriction mechanism 80 restricts the allowable opening width B at the leading end position of the projecting portion 85. To the cutter mechanism 25 without lifting the restriction gate 81.
For this reason, in this example, the paper P is shredded simultaneously by passing through the meshing region of the bladed drums 31 and 32 in the pair configuration, and the shredded chips Pa are scraped as the cleaning mechanism 26. , 42 and scraped off the bladed drums 31, 32 and fall downward.
Then, when the trailing end of the sheet P passes through the sheet presence sensor 121 and a predetermined time (a time estimated to be the end of the shredding process) has elapsed, the control device 120 ends the shredding process. It is determined that the drive motor 51 is driven, and the series of shredding control processing is ended.

<When excess paper is loaded>
Next, assuming that an excessive sheet P thicker than the allowable opening width B is input from the input port 22 to the input path 23, as shown in FIG. 7, the sheet presence sensor 121 detects the presence of the sheet P and the sheet A detection signal from the presence sensor 121 is taken into the control device 120, and in conjunction with this, the drive motor 51 drives the bladed drums 31, 32 of the cutter mechanism 25 according to the predetermined drive condition.
At this time, as shown in FIG. 8A, the sheet P passes through the restriction gate 81 and reaches the cutter mechanism 25 while leaving a surplus portion of the excess sheet P. As a result, the sheet P is drawn into the cutter mechanism 25. Along with this, the surplus sheet P blocked by the restriction gate 81 is along the guide surface 87a of the projecting portion 85 of the restriction gate 81 on the inlet port 22 side. It is guided and pulled into the tip position of the protrusion 85.
In this state, the restriction gate 81 is lifted upward by the surplus sheet P, but the leading end position of the projecting portion 85 of the restriction gate 81 is closer to the inlet 22 than the position of the center line Lc in the sheet feeding direction. It is easy to secure a long span of the auxiliary line L ₁ from the center of the support shaft 86 of the regulation gate 81 to the tip position of the projection 85 which is the point of action of the force Fp lifting the regulation gate 81 upward. The moment Mp for rotating the restriction gate 81 in the direction against the biasing force Fs by the biasing spring 113 around the support shaft 86 can be easily set large.

More specifically, as shown in FIGS. 5 and 6, the span between the biasing force Fs by the biasing spring 113 and the center of the support shaft 86 in the regulating gate 81 is regulated by s1 with the sheet P carried in. Assuming that the span between the lifting force Fp and the center of the support shaft 86 is s2 in the present example, it is selected to satisfy s2s2 × s1 in this example.
In this case, the moment Ms around the support shaft 86 of the biasing force Fs by the biasing spring 113 is Fs × s1, while the moment Mp around the support shaft 86 of the force Fp for lifting the restriction gate 81 is Fp × s2.
Here, as a condition for swinging the restriction gate 81 in the direction against the biasing force Fs by the biasing spring 113, it is necessary that Mp> Ms. Here, since s2 ≧ 2 × s1, the force Fp for lifting the tip end position of the protrusion 85 of the regulation gate 81 is limited to 1⁄2 or less of the biasing force Fs by the biasing spring 113 so as to be the regulation gate 81. It is understood that it is possible to rock the
Therefore, in the case of this example, the excess paper P passes through the regulation gate 81 while swinging the regulation gate 81 in a predetermined direction. At this time, as shown in FIG. 6, when the regulation gate 81 swings by a predetermined amount in a predetermined direction, the swinging piece 90 of the regulation gate 81 is separated from the micro switch actuator 124 as the sheet excess sensor 122 accordingly. The micro switch is turned on by oscillating a predetermined amount in the direction. Then, as shown in FIG. 7, the control device 120 determines that the excess paper P has been carried in, and stops the driving of the cutter mechanism 25 of the shredding mechanism 24 and performs the normal rotation driving of the cutter mechanism 25. Ban. For this reason, the situation where the excess paper P is unnecessarily drawn into the cutter mechanism 25 is eliminated at an early stage, and troubles such as breakage of the cutter mechanism 25 are avoided.

<When excess paper is discharged>
After the driving of the cutter mechanism 25 is stopped, it is necessary to remove the excess paper P drawn into the cutter mechanism 25. In this example, as shown in FIG. 8B, the cutter mechanism 25 of the shredding mechanism 24 is reversely driven (reversed) to feed the excess paper P drawn into the cutter mechanism 25 from the carry-in path 23 into the loading opening. Discharge to 22.
At this time, since the excess paper P discharged from the cutter mechanism 25 is pushed out in the area on the shredding mechanism 24 side of the restriction gate 81 in the carry-in path 23, the thickness close to the upper limit opening width A of the carry-in path 23 In a bulky state, the protrusion 85 of the restriction gate 81 abuts on the guide surface 87b on the shredding mechanism 24 side. In this state, the excess of the excess paper P is guided along the guide surface 87b to the leading end position of the projecting portion 85, and tries to pass through the leading end position of the projecting portion 85 of the restriction gate 81.
Here, the excess portion of the excess paper P is guided along the guide surface 87b and simultaneously exerts a pressing force in a direction perpendicular to the guide surface 87b, and further, the tip position of the protrusion 85 of the regulation gate 81 Apply lifting force. As a result, in addition to the moment by the lifting force of the regulation gate 81, the moment by the pressing force acting on the guide surface 87b acts synergistically on the regulation gate 81, and the biasing force Fs of the biasing spring 113 As a force for swinging the regulation gate 81 in the direction against the biasing direction, it is possible to swing the regulation gate 81 in a state of being suppressed to a smaller amount than when the excess paper is loaded.
For this reason, excess paper P passes through the regulation gate 81 and is discharged from the carry-in path 23 toward the insertion port 22.

Further, in the present embodiment, when the excess sheet P passes the regulation gate 81 with a thickness close to the upper limit opening width A, the projecting portion 85 of the regulation gate 81 is a region of the carry-in path 23 along with the oscillation of the regulation gate 81. Since the sheet P is retracted from the inside, the excess sheet P can easily pass through the regulation gate 81. In particular, in the present embodiment, since the outer portion other than the projecting portion 85 does not protrude into the area of the carry-in path 23 with the swinging of the control gate 81, excess paper P passes through the control gate 81. There is also no concern that part of the outer portion of the regulation gate 81 will be a hindrance as resistance.
Then, when excess paper P discharged from the carry-in path 23 is removed, it is detected that the paper P is not present in the carry-in path 23 by the paper presence sensor 121, and the control device 120 detects no paper from the paper presence sensor 121. After receiving the detection signal, the drive of the cutter mechanism 25 of the shredding mechanism 24 is stopped and the forward rotation inhibition of the cutter mechanism 25 is canceled.

形態 Form of comparison 1
Next, in evaluating the performance of the opening restriction mechanism 80 according to the present embodiment, the opening restriction mechanism 80 ′ according to the comparative example 1 will be described.
FIG. 9 shows the main part of the opening restricting mechanism 80 'according to the first comparative example.
In the figure, the opening restricting mechanism 80 ′ extends along the width direction intersecting the sheet P conveyance direction of the conveyance path 23, and has an upper limit opening width corresponding to the maximum thickness dimension of the sheet P that can be inserted into the conveyance path 23. A regulation gate 181 for regulating a predetermined permissible opening width B narrower than A, a positioning mechanism (not shown) for positioning the regulation gate 181 such that the regulation gate 181 regulates the allowable opening width B, and a positioning mechanism And a biasing mechanism 110 which biases the restriction gate 181 positioned at the position toward the positioning position.
In this example, the restricting gate 181 has a projecting portion 185 projecting into the region of the carry-in path 23 substantially as in the first embodiment, and the allowable opening width B is restricted at the tip end position of the projecting portion 185. While being pivotable about a support shaft 186 extending along the longitudinal direction closer to the shredding mechanism 24 than the position of the center line Lc in the carrying direction of the sheet P, unlike the first embodiment, the regulation is restricted. The leading end position of the projecting portion 185 of the gate 181 is provided corresponding to the position of the center line Lc in the carrying-in direction of the sheet P, and the projecting portion 185 is a flat guide surface 187 connected in a mountain shape bordering the leading end position. Specifically, (187a, 187b) are formed symmetrically.
The biasing mechanism 110 has substantially the same structure as that of the first embodiment (in FIG. 9, a hooking hole 111 and a biasing spring 113).
Then, in this example, the span between the biasing force Fs by the biasing spring 113 and the center of the support shaft 186 in the regulating gate 181 is s1 ′, and the leading end position of the projecting portion 185 of the regulating gate 181 Assuming that the span between the lifting force Fp and the center of the support shaft 186 is s2 ', in this example, it is selected to satisfy s2' 選定 s1 '.

-Shredder shredding control processing-
Next, shredding control processing of the shredder according to the first embodiment will be described.
<Normal shredding>
The normal shredding process is substantially the same as in the first embodiment.
<When excess paper is loaded>
Next, assuming that an excess of paper P thicker than the allowable opening width B is loaded from the loading port 22 into the carry-in path 23, as shown in FIG. The sheet P passes through the regulation gate 181 and reaches the shredding mechanism 24. As a result, the sheet P is drawn into the shredding mechanism 24. Along with this, the surplus sheet P blocked by the restriction gate 181 follows the guide surface 187a on the insertion port 22 side of the projecting portion 185 of the restriction gate 181. Guided and pulled into the tip position of the projection 185.
At this time, the tip position of the projecting portion 185 of the regulation gate 181 is selected so that the span between the center and the center of the support shaft 186 is short, and in this example, s2′ss1 ′, In order to swing 181 in the direction against the biasing force Fs by the biasing spring 113, it is necessary to lift the tip end position of the projection 185 of the regulation gate 181 with a force Fp exceeding the biasing force Fs by the biasing spring 113 is there. However, it is difficult to obtain a force exceeding the biasing force Fs by the biasing spring 113 as a force Fp for lifting the regulation gate 181. In this example, the regulation gate 181 hardly swings, and the surplus sheet P is restricted. It passes in the state compressed to the allowable opening width B part, and it clogs in the area | region by the side of the shredding mechanism 24 of the carrying-in path | passage 23, and there exists a concern which becomes difficult to pull out.

<When excess paper is discharged>
Since it becomes difficult to continue the shredding process by the shredding mechanism 24 assuming that the excess paper P is jammed while being pulled into the shredding mechanism 24 at the time of excessive sheet feeding, the shredding mechanism 24 is stopped urgently After that, in order to remove the jammed sheet P, the shredding mechanism 24 is reversely driven (reversed) to discharge the sheet P.
At this time, as shown in FIG. 10B, the excess paper P is guided along the guide surface 187 b on the shredding mechanism 24 side of the protrusion 185 of the restriction gate 181 and travels to the leading end position of the protrusion 185. In this state, the surplus portion of the excess paper P is guided along the guide surface 187b and simultaneously exerts a pressing force in a direction perpendicular to the guide surface 187b, and further, the tip of the projection 185 of the regulation gate 181 Apply a force to lift the position. As a result, in addition to the moment due to the lifting force of the regulation gate 181, the moment due to the pressing force acting on the guide surface 187b acts synergistically on the regulation gate 181. As the force for swinging the regulation gate 181 in the direction against the biasing direction, it is possible to swing the regulation gate 181 in a state where the force is smaller than the biasing force Fs by the biasing spring 113. However, since the span from the support shaft 186 is short as the moment Mp for swinging the regulation gate 181, it is not easy to secure a sufficient moment Mp.

形態 Modification 1
FIG. 11 shows the main part of the opening regulating mechanism 80 according to the first modification.
In the figure, the basic configuration of the opening restricting mechanism 80 includes the restricting gate 81, the positioning mechanism and the urging mechanism 110 not shown, substantially the same as the first embodiment, but the restricting gate 81 is an embodiment of the present invention. It has a configuration different from one. The same components as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and the detailed description thereof is omitted here.
In this example, in the restriction gate 81, the leading end position of the projecting portion 85 is closer to the insertion port 22 than the position of the center line Lc of the paper P in the loading direction under the condition that the restriction gate 81 is positioned by the positioning mechanism. The projecting portion 85 is provided with a guide surface 87 (87c, 87d) continuous in a mountain shape at the tip position, but unlike the first embodiment, the guide surface 87 (87c, 87d) is outside. Auxiliary lines La and Lb extending in a tangential direction at a portion adjacent to the tip end position of the protrusion 85 among the guide surfaces 87 (87c and 87d) which are formed in a curved surface shape which is convex toward the direction .theta..sub.out an acute angle between the reference line L ₀ in the direction along the 23, when .theta.in, .theta..sub.out, it adapted to satisfy the relation .theta.in ≦ 60 °.
According to this modification, it is possible to select θout and θin smaller than the regulation gate 81 according to the first embodiment (having the planar guide surface 87 (87a, 87b)), and Even if the excessive sheet P collides with the projecting portion 85 of the regulating gate 81, the guide property of the sheet P toward the tip end position of the projecting portion 85 is preferably maintained.

Second Embodiment
FIG. 12A shows the main part of the shredder according to the second embodiment.
In the figure, the basic configuration of the shredder 20 includes an opening regulating mechanism 80 in the middle of the carry-in path 23 between the insertion port 22 of the shredder case 21 and the shredding mechanism 24 substantially as in the first embodiment. However, unlike the first embodiment, the noise reduction mechanism 130 is provided closer to the inlet 22 than the opening regulating mechanism 80 in the loading path 23. The same components as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and the detailed description thereof is omitted here.
In this example, as shown in FIGS. 12 (a) and 12 (b) and 13, the noise reduction mechanism 130 performs shredding by the shredding mechanism 24 and the rear end of the sheet P at the time of shredding by the shredding mechanism 24. In order to reduce noise such as rattling noise, the open / close cover 141 is provided on a part of the upper section chute 23a so as to be openable and closable, and the silent roll 131 is incorporated in the open / close cover 141.
Here, the open / close cover 141 is such that the support bracket 142 is fixed to a part of the upper section chute 23 a and is attached to the support bracket 142 so as to be openable and closable about the support shaft 143. In this example, the open / close cover 141 constitutes the recess 21 b of the shredder case 21 when the open / close cover 141 is closed.

In the present embodiment, a long rectangular attachment hole 144 extending along the width direction intersecting the sheet P conveyance direction is opened in a portion of the opening / closing cover 141 facing the carry-in path 23. A silent roll 131 is installed at a portion facing the lower section chute 23b.
In this example, the noise reduction roll 131 is configured as a cylindrical pipe whose hollow ends are opened using an appropriate material such as resin or metal, and the axial dimension thereof is selected according to the width dimension of the carry-in path 23 . And the protrusion 132 which protrudes inside respectively is provided in the longitudinal direction both-sides wall 145 of the opening-closing cover 141, and the noise reduction roll 131 suspends and supports by arrange | positioning the protrusion 132 in the both-ends opening of the noise reduction roll 131. It is done. The protrusion 132 is not limited to a pin, and a fastener such as a screw may be used.
Furthermore, when the open / close cover 141 is closed, the silent roll 131 secures the opening of the gap g between the lower section chute 23b. Here, the gap g may be appropriately selected, but for example, assuming a dimension through which one sheet of paper P having a basis weight of about 60 to 100 g can pass, it is about 0.1 mm (0.08 to 0.12 mm) Is selected. The gap g is not limited to one sheet of paper P, and it is of course possible to assume a dimension through which the number of sheets of paper P smaller than the upper limit can be passed.

-Operation of noise reduction mechanism-
Next, the operation of the noise reduction mechanism 130 used in the present embodiment will be described.
First, when, for example, one sheet of paper P having a thickness smaller than the gap g is carried into the carry-in path 23 from the insertion port 22, the sheet P is an opening of the gap g between the silent roll 131 and the lower division chute 23b. It passes through the section and reaches the shredding mechanism 24.
At this time, one sheet of paper P moves along the lower section chute 23 b and is carried in while leaving a minute gap with the silent roller 131. Even if the leading edge of the sheet P is bent or slightly rounded in such a loading process, there is a possibility that the leading edge of the sheet P may come into contact with the silent roller 131. Since the contact portion is a curved surface, the leading end of the sheet P is smoothly guided to the opening of the gap g of the silent roller 131 and there is no concern that the opening of the gap g of the silent roller 131 is clogged.
In this state, when the sheet P is shredded by the shredding mechanism 24, the shredding noise by the shredding mechanism 24 is transmitted along the carry-in path 23 and directed to the insertion port 22 side. In the middle, an opening of a gap g narrower than the other portions is formed by the silent roller 131 and the lower section chute 23b, and most of the opening of the gap g is occupied by the sheet P. Therefore, the opening of the gap g between the silent roll 131 and the lower section chute 23b only leaves a minute gap due to the presence of the sheet P, and the shredding noise by the shredding mechanism 24 is largely attenuated in the minute gap portion Do.
In addition, since a part of the non-shredding portion of the paper P located on the downstream side in the carry-in direction passes through the opening of the gap g of the silent roller 131, the rear of the paper P when shredding the paper P Even if the end flaps within the carry-in path 23, the amount of flapping of the sheet P is suppressed at the opening of the gap g, and noise due to the flapping of the rear end of the sheet P is less likely to occur.

Further, in the case of a plurality of sheets P having a thickness greater than or equal to the gap g, since the silent roll 131 is suspended and supported by the opening and closing cover 141, the sheet P has an opening in the gap g of the silent roll 131. When passing through, the silent roller 131 is moved toward the shredding mechanism 24 along the lower section chute 23b of the carry-in path 23 while retracting and moving the silent roller 131.
At this time, even if the sheet rigidity of one sheet P is weak, it is possible to make the surface rigidity itself stronger. Therefore, although the silent roll 131 presses the sheet P by the urging force of the sine component of its own weight, the surface rigidity of the sheet P when the sheet P passes through the opening of the gap g as the pressing force. By setting the silent roll 131 in advance to be able to move in the retraction direction, the sheet P can pass through the opening of the gap g of the silent roll 131 while retracting the silent roll 131. Furthermore, since the silent roll 131 freely rotates following the loading operation of the sheet P, there is no concern that the loading operation of the sheet P is impaired by the silent roll 131.
In this state, when the sheet P is shredded by the shredding mechanism 24, the shredding noise by the shredding mechanism 24 is transmitted to the input path 22 through the carry-in path 23, but in this example, the silent roller 131 is used. Since the sheet moves in the retraction direction as the sheet P having a high surface rigidity passes, the width of the opening between the silent roll 131 and the lower section chute 23b is the initial position of the silent roll 131 according to the thickness of the sheet P. The sheet P is wider than the size of the gap g when it is positioned, and the sheet P is disposed in a state of closing the opening between the quiet roller 131 and the lower section chute 23b which has been retracted. Therefore, the opening between the silent roll 131 and the lower section chute 23b is sealed with the sheet P, so most of the shredding noise by the shredding mechanism 24 is at the silent roll 131 portion of the carry-in path 23. There is little concern that it will be shut off and leak out from the inlet 22 of the carry-in path 23. In addition, even if the rear end of the sheet P flaps in the carry-in path 23 at the time of shredding of the sheet P by the shredding mechanism 24, the movement of the sheet P is suppressed by the silent roller 131, so the rear end of the sheet P Flapping in the transport path 23 is small, and noise associated with flapping is less likely to occur.

Further, in the present embodiment, as shown in FIG. 13, since the silent roll 131 of the noise reduction mechanism 130 moves following the opening of the open / close cover 141, temporarily the excess paper inserted into the carry-in path 23. Even if P is clogged by the opening regulating mechanism 80, the clogged paper P can be easily removed.
The noise reduction mechanism 130 is not limited to the suspension type noise reduction roll 131, and may be, for example, one sheet having a thickness determined in advance as the opening width of the carry-in path 23 as a noise reduction member for reducing noise. A gap through which the sheet P can pass is secured, and at least a portion contacting the sheet P has a curved surface along the sheet P loading direction, and when the sheet P having a thickness dimension larger than the gap g is loaded The design change may be made as appropriate, as long as it retracts and moves according to the thickness of the sheet P by the contact of the sheet.

DESCRIPTION OF SYMBOLS 1 ... Shredder housing | casing 2. Insertion | throwing-in opening 3 ... Carrying-in path | pass 4: 4 Shredding mechanism 5 ... Opening control mechanism 6 ... Regulating member, 7 ... Supporting point, 8 ... Projection part 9 (9a, 9b) ... Guidance Surface 10 positioning member 11 biasing member P shredded material A upper limit opening width B allowable opening width L ₀ reference line Lc center line L ₁ , La, Lb Auxiliary line, α, θout, θin ... angle, s1, s2 ... span

Claims (10)

A shredder case having an insertion slot into which the material to be shredded is input and a transfer path for loading the material to be shredded into the insertion slot;
A shredding mechanism provided in the middle of the carry-in path in the shredder case to shred the material to be shredded;
An opening restricting mechanism which is provided in a part of the carry-in path from the inlet to the shredding mechanism, and restricts an opening width corresponding to the thickness direction of the material to be chopped in the carry-in path;
Equipped with
The opening regulation mechanism
The maximum length of the shredded material that can be introduced into the carry-in path at the leading end position of the protrusion that extends along the width direction intersecting the carry-in direction of the shredded material of the carry-in path and protrudes into the region of the carry-in path A predetermined allowable opening width narrower than the upper limit opening width corresponding to the thickness dimension is regulated, and a fulcrum provided closer to the shredding mechanism than a center line position in the carrying direction of the shredded material A regulating member that swings;
A positioning member in which a portion of the regulating member abuts and is positioned such that the regulating member regulates the allowable opening width;
And a biasing member biasing the regulating member such that a part of the regulating member abuts against the positioning member.
The restricting member is provided closer to the input port than the center line position in the carrying-in direction of the material to be shredded under the condition that the restricting member is positioned by the positioning member.
The projecting portion has a guide surface connected in a mountain shape at the tip end position, and when the regulating member swings in a direction against the biasing direction of the biasing member, the projecting portion is the carry-in path A shredder characterized by being retractable from within the area of In the shredder according to claim 1,
A shredder characterized by comprising inhibiting means for inhibiting normal rotation drive by the shredding mechanism when the regulating member is swung in a direction against the biasing direction of the biasing member. In the shredder according to claim 1 or 2,
An auxiliary line L ₁ connecting the end position of the fulcrum and the projecting portion of the regulating member, when the acute angle and α between the reference line L ₀ in the direction along the carrying path,
A shredder characterized by satisfying a relationship of α ≦ 50 °. In the shredder according to claim 1 or 2,
A shredder characterized in that the projection of the regulation member has a flat or curved guide surface that is convex outward. In the shredder according to claim 1 or 2,
The restricting member includes auxiliary lines La and Lb extending in a tangential direction at a portion adjacent to the tip end position of the protrusion of the mountain-shaped guide surface of the protrusion, and a reference line L in a direction along the carry-in path. Let θout and θin be acute angles between ₀ and
A shredder characterized by satisfying the relationship of θout, θin ≦ 60 °. In the shredder according to claim 1 or 2,
When the restricting member swings and the protrusion retracts from within the area of the carry-in path, the outer portion other than the protrusion of the restricting member is formed so as not to protrude into the area of the carry-in path Shredder characterized by being. In the shredder according to claim 1 or 2,
The shredder is characterized in that the positioning member is provided at both ends in the width direction of the carry-in path, and positioning portions provided at both ends in the width direction of the regulating member abut on each other. In the shredder according to claim 1 or 2,
The shredder is characterized in that the biasing member is hooked on a hook provided on a portion other than the projecting portion of the regulating member, and the regulating member is biased in a direction in which the regulating member abuts on the positioning member. . In the shredder according to claim 8,
The span between the biasing force of the biasing member and the center of the fulcrum is s1, and the span between the center of the fulcrum and the force of lifting the tip of the projecting portion of the regulating member by the material to be chopped in is s2. If you
A shredder characterized by satisfying s2 ≧ 2 × s1. An opening regulating mechanism which is provided in a part of a carry-in path from the inlet to the shredding mechanism and regulates the opening width corresponding to the thickness direction of the material to be chopped,
The maximum length of the shredded material that can be introduced into the carry-in path at the leading end position of the protrusion that extends along the width direction intersecting the carry-in direction of the shredded material of the carry-in path and protrudes into the region of the carry-in path. A predetermined allowable opening width narrower than the upper limit opening width corresponding to the thickness dimension is regulated, and a fulcrum provided closer to the shredding mechanism than a center line position in the carrying direction of the shredded material A regulating member that swings;
A positioning member in which a portion of the regulating member abuts and is positioned such that the regulating member regulates the allowable opening width;
And a biasing member biasing the regulating member such that a part of the regulating member abuts against the positioning member.
The restricting member is provided closer to the input port than the center line position in the carrying-in direction of the material to be shredded under the condition that the restricting member is positioned by the positioning member.
The projecting portion has a guide surface connected in a mountain shape at the tip end position, and when the regulating member swings in a direction against the biasing direction of the biasing member, the projecting portion is the carry-in path An opening restricting mechanism characterized by being retractable from within the region of

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