JP2005066575A - Shredder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shredder capable of reducing vibration or noise. <P>SOLUTION: This shredder for cutting a material to be shaved is provided with a shredder body having a fixed blade and a movable blade rotated against the fixed blade and cutting the material to be shaved; a lid member mounted to the shredder body and formed with a throwing port for throwing the material to be shaved; a guide part for guiding movement of the material to be shaved from the throwing port toward a cutting position by the fixed blade and the movable blade; and a rubber cover for suppressing the material to be shaved cut at the cutting position from being discharged from the throwing port. The guide part is fixed to the lid member through the rubber cover. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a shredder (also referred to as a garden shredder) that cuts cut materials such as branches, leaves, and grass into chips.

  A material such as a pruned tree branch is bulky if it is long, and depending on the local government, it cannot be discarded as garbage if it is long, so it must be cut into small chips. In addition, the demand for shredders is increasing because these timber branches can be cut into small pieces to make humus material.

  Conventionally, as this type of shredder, one shown in FIG. 19 is known (see Patent Document 1 and FIG. 1). The shredder includes a base 2 supported by legs 1, a hopper 3 that is placed on the base 2 and guides the work material, and a chute 9 that is formed on the hopper 3 and discharges the work material. Below the hopper 3, a fixed blade 4 and a movable blade 5 that rotates with respect to the fixed blade 4 are provided. These hopper 3 and base 2 are covered with a soundproof wall 6. At the upper end of the soundproof wall 6, a lid member 7 having an insertion port 7 a is attached. Around the input port 7a, a pair of rubber sag 8, 8 is provided to prevent backflow of the input work material (see Patent Document 1, Claim 1, Paragraph 0025).

JP 2001-79434 A

  Since the work material is cut by the rotating movable blade 5, the work material collides with the hopper 3 in an impact. In the conventional shredder, the hopper 3 is supported on the base 2 like a cantilever (that is, the lower side of the hopper 3 is fixed to the base 2 and the upper side of the hopper 3 is free). The upper side is likely to vibrate, and noise is easily generated. Although it is conceivable to fix the upper side of the hopper 3 to the lid member 7 in order to suppress the vibration on the upper side of the hopper 3, the vibration of the hopper 3 is transmitted to the lid member 7 as it is simply fixed.

  In addition, there is a gap between the rubber sag 8 and 8, and since the rubber sag 8 and 8 is a single piece without a slit or the like, the entire rubber sag is brought about by contact between the work material and the rubber sag 8 or 8. There is a problem that the opening for the noise to leak out becomes large.

  Further, since the rubber sag 8, 8 is only in the vicinity of the insertion port 7a, there is a possibility that the chips remaining in the lower part of the hopper 3 without being discharged may jump out of the insertion port 7a.

  An object of the present invention is to provide a shredder that can solve these problems and can reduce vibration or noise.

  In order to solve the above-mentioned problem, the invention of claim 1 is a shredder for cutting a work material, comprising a fixed blade and a movable blade that rotates relative to the fixed blade and cuts the work material. And a lid member that is attached to the shredder main body and that has an inlet for receiving the workpiece, and the workpiece moves toward the cutting position by the fixed blade and the movable blade from the inlet. And a rubber cover for suppressing the work material cut at the cutting position from being discharged from the insertion port, and the guide part is fixed to the lid member via the rubber cover. It is characterized by that.

  The invention of claim 2 is a shredder for cutting a work material, the shredder body having a fixed blade and a movable blade for rotating the fixed blade to cut the work material, and is attached to the shredder body. A lid member formed with an insertion port into which the work material is input, and a guide unit that guides the movement of the work material from the input port toward a cutting position by the fixed blade and the movable blade, A rubber cover that is provided around the input port and prevents the work material cut at the cutting position from being discharged from the input port, and the rubber cover has a portion that contacts the work material. A slit is formed so as to be deformed and the other portions are not easily deformed.

  The invention of claim 3 is a shredder for cutting a work material, the shredder body having a fixed blade and a movable blade for rotating the fixed blade to cut the work material, and the shredder body is attached to the shredder body. A lid member formed with an insertion port through which the work material is input, a guide unit for guiding the work material moving from the input port toward a cutting position by the fixed blade and the movable blade, and the input A first rubber cover that is provided around the mouth and suppresses the work material cut at the cutting position from being discharged from the input port, and is provided between the first rubber cover and the cutting position. And a second rubber cover that suppresses the work material cut at the cutting position from being discharged from the input port.

  According to the first aspect of the present invention, since the rubber cover absorbs vibration energy, it is possible to suppress the vibration of the guide portion from being transmitted to the lid member that is touched manually. In addition, since the rubber cover can be used for both the function of suppressing the work material from being discharged from the inlet and the function of reducing the vibration, for example, between the guide part and the lid member separately from the rubber cover. The number of parts can be reduced as compared with the case where a buffer rubber that absorbs vibration energy is interposed.

  According to the invention of claim 2, since the slit is formed in the rubber cover, it is possible to reduce the opening area generated by the deformation of the rubber cover when the work material is introduced. Therefore, it is possible to further suppress noise from leaking from the opening and the work material from jumping out.

  According to invention of Claim 3, it can suppress more that the work material which was not discharged | emitted and remained in the grinding | pulverization chamber protrudes from an insertion port. On the other hand, when the second rubber cover is not provided, when cutting progresses and the work material becomes shorter, the work material is not supported by the first rubber cover. As a result, the work material becomes free and vibrations may be easily generated. By providing the second rubber cover, this problem can be solved, and the shortened work material can be stably supported.

  1 to 3 show a shredder according to a first embodiment of the present invention. FIG. 1 shows a plan view, and FIGS. 2 and 3 show sectional views. FIG. 3 is a cross-sectional view similar to FIG. 2, and shows sections of the fixed blade and the movable blade in cross section.

  First, the general movement of the shredder will be described with reference to FIGS. When the work material 10 such as branches and leaves is manually input from the input port 11a at the upper part of the shredder, the work material 10 is guided to a hopper guide 12 as a guide portion and guided to the crushing chamber 13 at the back. The crushing chamber 13 is provided with a fixed blade 14 and a movable blade 15 that can rotate relative to the fixed blade 14 (see FIG. 3). The movable blade 15 is rotationally driven by a motor 19. The crushing chamber 13 is provided with a drawing drum 16 that rotates together with the movable blade 15, and the leading end of the work material 10 is caught in the drawing drum 16, and the workpiece is cut at a cutting position 17 by the fixed blade 14 and the movable blade 15. The material 10 is guided. Thereafter, the work material 10 is sandwiched between the fixed blade 14 and the movable blade 15 and cut. The cut chips are discharged to the outside of the shredder by sliding on the discharge chute 18 inclined obliquely. Since the movable blade 15 rotates, the cutting by the fixed blade 14 and the movable blade 15 is repeated thereafter.

  A specific structure of the shredder will be described in detail. The shredder is composed of a shredder main body 21 having a fixed blade 14, a movable blade 15, a motor 19 and the like, and a lid member 11 in which an input port 11a into which the work material 10 is input is formed. The lid member 11 is formed with an inclined surface that is inclined toward the charging port 11a. The shredder body 21 and the lid member 11 are fixed by a coupling means such as a bolt.

  As shown in FIG. 1, a leg portion 21a is formed so as to protrude from a lower portion of the shredder body 21, and a pair of wheels 22 and 22 are rotatably attached to the leg portion 21a so that the shredder can be moved manually. . When moving the shredder, the wheel 23 is run after the handle 23 is gripped to lift the part installed on the ground.

  As shown in FIGS. 2 and 3, the shredder body 21 includes a lower housing 24 in which the motor 19 is accommodated, an upper housing 28 attached to the upper portion of the lower housing 24, a bracket 25 that covers the lower housing 24, and a bracket 25, a bracket cover 26 attached to 25, a fixed blade 14 fixed to the bracket cover 26, and a movable blade 15 that is rotationally driven by a motor 19.

  The lower housing 24 accommodates a motor 19 and a main shaft 29 that is rotationally driven by the motor 19. The main shaft 29 is rotatably supported by the lower housing 24 through support means such as a bearing. The main shaft 29 is inclined at a predetermined angle with respect to the vertical direction (the direction in which the work material is fed). A blade disk 30 and a retracting drum 16 are attached to the tip of the main shaft 29. The movable blade 15 is fixed to the blade disk 30 by fixing means such as bolts.

  A bracket 25 attached to the lower housing 24 constitutes the discharge chute 18. A bracket cover 26 that covers the bracket 25 constitutes the crushing chamber 13.

  FIG. 4 shows a front view of the shredder body 21 with the bracket cover 26 removed. A movable blade 15 is fixed to the disk-shaped blade disk 30. In the blade disk 30, a groove-shaped notch 30 a is formed along the edge 15 a of the movable blade 15 in order to discharge the cut chip. The pulling drum 16 fixed to the upper surface of the blade disk 30 has a spiral protrusion 31 around the work drum 10 so that the work material 10 can be automatically pushed into the cutting position. The configuration of the drawing drum 16 will be described later.

  FIG. 5 shows a bottom view of the removed bracket cover 26. The fixed blade 14 is fixed to the back surface of the bracket cover 26 by a coupling means such as a bolt. The surface 14a of the fixed blade 14 is oriented in the vertical direction so as to guide the work material 10 moving from vertically upward to downward (see FIGS. 3 and 8).

  6 and 7 show a state in which the workpiece 10 to be input is guided to the cutting position. The work material 10 input from the input port 11 a enters the crushing chamber 13 while being guided by the hopper guide 12. In the grinding chamber 13, a rotating drawing drum 16 guides the work material 10 from the position shown in FIG. 6 toward the fixed blade 14 to the cutting position 17 shown in FIG. 7. At the cutting position 17, the fixed blade 14 and the movable blade 15 sandwich and cut the work material 10 (see FIG. 8). The edge 14b of the fixed blade 14 and the edge 15a of the movable blade 15 are not parallel to each other but cross obliquely like scissors. Thus, the work material 10 is efficiently cut between the fixed blade 14 and the movable blade 15 so as to be cut with scissors. Further, as shown in FIG. 8, the gap h between the edge 14a of the fixed blade 14 and the edge 15a of the movable blade 15 is set optimally. Specifically, when the soft work material 10 is cut, a gap h is set. Further, when the fixed blade is worn, the gap h is optimally adjusted.

  As shown in FIGS. 2 and 3 again, in the upper housing 28, a cylindrical shape that guides the movement of the work material 10 from the insertion port 11 a toward the cutting position 17 by the fixed blade 14 and the movable blade 15. The hopper guide 12 is provided. The hopper guide 12 is elongated in a substantially vertical direction, and its cross-sectional shape is variously set such as a circular shape or a polygonal shape.

  A pair of rubber covers 32 and 32 are attached around the input port 11a of the lid member 11 to prevent the work material cut at the cutting position 17 from flowing backward and being discharged from the input port 11a. The hopper guide 12 is fixed to the lid member 11 via a rubber cover 32. Specifically, the rubber cover 32 is sandwiched between the upper end of the hopper guide 12 and the lid member 11 by fixing means such as bolts (see also FIG. 9). Thus, the upper end of the hopper guide 12 is fixed to the lid member 11. On the other hand, the lower end of the hopper guide 12 engages with the bracket cover 26. Thereby, the upper end and the lower end of the hopper guide 12 are supported. As an assembling procedure, after the upper end of the hopper guide 12 is fixed to the lid member 11, the lower end of the hopper guide 12 is engaged with the bracket cover 26. Thereafter, the lid member 11 is fixed to the upper housing 28.

  Since the rubber cover 32 absorbs vibration energy, the vibration of the hopper guide 12 is suppressed from being transmitted to the lid member 11. Further, by making the rubber cover 32 have both a function of suppressing the discharge of the work material from the input port 11a and a function of reducing vibrations, for example, the hopper guide 12 and the lid member 11 separately from the rubber cover 32. The number of parts can be reduced as compared with the case where a buffer rubber that absorbs vibration energy is interposed between the two.

  10 and 11 show a comparative example in which a buffer rubber 34 that absorbs vibration energy is interposed between the hopper guide 12 and the lid member 11 in addition to the rubber cover 32. In this example, two parts of the rubber cover 32 and the buffer rubber 34 are required, and it can be seen that the number of parts increases.

  FIG. 12 shows a plan view of the pair of rubber covers 32, 32. Each of the pair of rubber covers fixed around the insertion port 11a has a plate shape. When the work material is not charged, as shown in FIG. 5A, the tip ends 32a, 32a of the pair of rubber covers 32, 32 are respectively closed so that the loading port 11a is closed by the pair of rubber covers 32, 32. Is close to the center of the inlet 11a. In addition, a plurality of slits 32b perpendicular to the line of the tip are formed at the tips 32a and 32a of the pair of rubber covers 32 and 32, respectively. As shown in FIG. 5B, the slit 32b deforms the rubber cover 32 only in the portion that comes into contact with the work material 10, and prevents the rubber cover 32 in other portions from being deformed. By forming the slit 32b in the rubber cover 32 as described above, the area of the opening 33 that is generated when the rubber cover 32 is deformed when the work material 10 is inserted can be reduced. Therefore, it is possible to prevent noise from leaking from the opening 33 and the work material from jumping out.

  FIG. 13 shows a rubber cover 32 when no slit is formed as a comparative example. (A) in the figure shows a state where the work material 10 is not charged, and (B) shows a state where the work material 10 is charged. It can be seen that when the slit is not formed, the area of the opening 33 generated by the deformation of the rubber cover 32 is increased.

  FIG. 14 shows a shredder according to the second embodiment of the present invention. Since the configuration of the shredder main body 21 and the lid member 11 is the same as that of the first embodiment, the same reference numerals are given to the main parts and the description thereof is omitted. In this embodiment, in addition to the first rubber cover 32 provided around the charging port 11 a, a second rubber cover 36 is provided between the first rubber cover 32 and the crushing chamber 13. The hopper guide 12 is vertically divided into two parts, and a second rubber cover 36 is sandwiched between the joint surfaces of the two divided parts. The configuration of the second rubber cover 36 is substantially the same as that of the first rubber cover 32.

  By providing the second rubber cover in this manner, it is possible to further suppress the work material that is not discharged and remains in the grinding chamber from jumping out from the input port. When the second rubber cover is not provided, when the cutting progresses and the work material becomes shorter, the work material is not supported by the first rubber cover and becomes free. As a result, there is a risk that vibration is likely to occur. By providing the second rubber cover, the shortened work material can be stably supported.

  FIG. 15 shows the blade disk 30 and the retracting drum 16 attached to the main shaft 29 (common to both the first embodiment and the second embodiment). A female screw is formed at the tip of the main shaft 29, and the blade disk 30 and the retracting drum 16 are fitted around the tip 29a. The blade disk 30 and the retracting drum 16 are fixed to the main shaft 29 by bolts 37.

  The top surface of the drawing drum 16 on which the bolt 37 for fixing the drawing drum 16 is disposed is covered with the bracket cover 26 and is off the route where the work material 10 is put. The top surface of the pulling drum 16 is a portion that is not effective for pulling (the protrusion 31 is not provided), and if it enters the charging route, the work material on the top surface cannot be pulled into the cutting position 17. .

  FIG. 16 shows a detailed view of the retracting drum 16. In the figure, (A) shows a plan view, (B) shows a side view, (C) shows a bottom view, and (D) shows a perspective view. A step-like protrusion 31 is integrally formed around the drawing drum 16. For example, three stepped protrusions 31 are formed in the circumferential direction.

  The stepped protrusion 31 is composed of a plurality of claws 38. Each claw 38 has a side surface 38a located in the radial direction and an arcuate back surface 38b. The plurality of claws 38 are arranged while being gradually shifted in the rotation direction indicated by the arrow (1) toward the direction away from the blade disk 30 (that is, toward the upward direction in FIG. 16B). It is possible to draw the work material to the cutting position by the step-like protrusion 31 composed of the plurality of claws 38. Further, by forming the stepped protrusion 31 integrally around the drawing drum 16, it is possible to suppress the occurrence of imbalance of the rotating body, to prevent an assembly error, and to maintain an appropriate crushing efficiency.

  FIG. 17 shows a divided piece 40 having a convex 40a, a concave 40b and a hole 40c having a detent function as a comparative example. When the divided pieces 40 are overlapped, a drawing drum assembly can be formed. However, in order to enable superposition, the protrusions 40a, the recesses 40b, and the holes 40c require backlash, which may cause unbalance in the rotating body during assembly. Further, when assembled, there is not a single combination of fitting of the protrusions 40a, the recesses 40b, and the holes 40c, so that the claws 38 are assembled in a reverse staircase as shown in FIG. 18 (A), or as shown in FIG. 18 (B). Thus, there is a possibility that the claws 38 are assembled in a straight line or misassembled. If assembled incorrectly, the work material will not be pulled in and proper grinding efficiency will not be maintained.

  Further, as shown in the bottom view of FIG. 16C, the cross-sectional shape of the hole 16a fitted into the main shaft 29 of the drawing drum 16 is an oval shape (in other words, a shape in which a pair of arcs are combined at both ends of a square). ). The cross-sectional shape of the front end portion 29 a of the main shaft 29 is also formed in an oval shape that is the same as the cross-sectional shape of the hole 16 a of the pull-in drum 16, so that the pull-in drum 16 is prevented from rotating with respect to the main shaft 29. Although not shown, the blade disk 30 is also formed with an oblong hole that matches the cross-sectional shape of the tip end portion 29 a of the main shaft 29, thereby preventing the blade disk 30 from rotating relative to the main shaft 29.

  The present invention is not limited to the above-described embodiment, and can be variously modified without changing the gist of the present invention. The structure of the shredder described above is merely an embodiment, and various modifications can be made.

The top view which shows the shredder in the 1st Embodiment of this invention. Sectional drawing which shows the said shredder. Sectional drawing which shows the said shredder. The front view of the shredder main body of the state which removed the bracket cover. The bottom view of the removed bracket cover. The top view which shows the state which guides the thrown-in work material to a cutting position (state before guidance). The top view which shows the state which guides the thrown-in work material to a cutting position (state after guidance). VIII-VIII sectional view taken on the line of FIG. IX-IX sectional view taken on the line of FIG. Sectional drawing which shows the shredder of a comparative example. XI-XI sectional view taken on the line of FIG. The top view of a rubber cover. The top view of the rubber cover of a comparative example. Sectional drawing of the shredder in 2nd Embodiment. Sectional drawing which shows the braid | blade disk and drawing-in drum which are attached to a main axis | shaft. Detailed view of the retractable drum. The figure which shows the division | segmentation piece of a comparative example. The figure which shows the state which piled up the division piece of the comparative example. Sectional drawing which shows the conventional shredder.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Work material 11 ... Lid member 11a ... Loading port 12 ... Hopper guide (guide part)
14 ... fixed blade 15 ... movable blade 17 ... cutting position 21 ... shredder body 32 ... rubber cover (first rubber cover)
32b ... Slit 36 ... Second rubber cover

Claims (3)

A shredder for cutting a work material,
A shredder body having a fixed blade and a movable blade that rotates relative to the fixed blade and cuts the work material;
A lid member attached to the shredder body and formed with a slot into which a work material is thrown;
A guide unit that guides the movement of the work material from the insertion port toward a cutting position by the fixed blade and the movable blade;
A rubber cover that is provided around the input port and suppresses the work material cut at the cutting position from being discharged from the input port;
The shredder, wherein the guide portion is fixed to the lid member via the rubber cover. A shredder for cutting a work material,
A shredder body having a fixed blade and a movable blade that rotates relative to the fixed blade and cuts the work material;
A lid member attached to the shredder body and formed with a slot into which a work material is thrown;
A guide unit that guides the movement of the work material from the insertion port toward a cutting position by the fixed blade and the movable blade;
A rubber cover that is provided around the input port and suppresses the work material cut at the cutting position from being discharged from the input port;
A shredder, wherein a slit is formed in the rubber cover so that a portion in contact with a work material is deformed and other portions are not easily deformed. A shredder for cutting a work material,
A shredder body having a fixed blade and a movable blade that rotates relative to the fixed blade and cuts the work material;
A lid member attached to the shredder body and formed with a slot into which a work material is thrown;
A guide portion for guiding a work material moving from the insertion port toward a cutting position by the fixed blade and the movable blade;
A first rubber cover that is provided around the input port and suppresses the work material cut at the cutting position from being discharged from the input port;
A second rubber cover that is provided between the first rubber cover and the cutting position and suppresses the work material cut at the cutting position from being discharged from the charging port. Shredder.

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