Shredder

Abstract

To provide a shredder capable of removing static electricity with a simple structure.SOLUTION: The shredder includes a shredding part having a shredding blade for shredding a supplied sheet material, a waste box part for storing shredded waste, and a metal part 30 electrically connected to the shredding part and disposed inside the waste box part.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a shredder having a waste box portion for storing shredded waste. [Background technology]

[0002] A shredder has been proposed in which an ion generator is installed in a passage through which shredded debris shredded by a shredding means falls, and static electricity is removed by irradiating the shredded debris with ions (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-171980 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned shredder, static electricity is removed from the shredded debris as it falls, so if the shredded debris falls unevenly, a high static removal effect cannot be achieved. SUMMARY OF THE INVENTION An object of the present invention is to provide a shredder that can remove static electricity with a simple configuration. [Means for solving the problem]

[0005] In order to solve the above problem, a shredder according to one embodiment of the present invention comprises a shredding section equipped with shredding blades for shredding supplied sheet material, a waste box section for storing shredded paper, and a metal section electrically connected to the shredding section and arranged inside the waste box section. [Effects of the Invention]

[0006] According to the present invention, static electricity can be removed with a simple configuration. [Brief explanation of the drawings]

[0007] [Figure 1]1 is an oblique view showing a shredder according to a first embodiment, where (a) is a view from above the rear, and (b) is a view from above the front with the lid open and the wastebasket section pulled out to the front. [Figure 2] 1A is a perspective view of the device main body in a disassembled state as seen from above the front, and FIG. 1B is a perspective view of the main body in a disassembled state as seen from above the front. [Figure 3] 1A and 1B are perspective views of the shredding unit, where FIG. 1A is a view from above the front side, and FIG. 1B is a view from above the rear side. [Figure 4] FIG. 1A is a cross-sectional view of the shredding unit as viewed from the left and right, and FIG. 1B is a perspective view of the cross-section of the shredding unit as viewed from above the front. [Figure 5] 1(a) is an enlarged perspective view of the main part on the front side of the main body as seen from the front bottom, and FIG. 1(b) is a cross-sectional perspective view for explaining the shredding side connection part. [Figure 6] The wastebasket section is cut at the rear side, where (a) is a view from the rear, and (b) is a perspective view from above the rear. [Figure 7] (a) is a view from the rear of the wastebasket side connection part with the cover removed, (b) is a view from the front of the metal part and the wastebasket side connection part, (c) is an enlarged oblique view of the wastebasket side terminal seen from above the rear, and (d) is an enlarged oblique view of the wastebasket side terminal seen from above the rear with the cover installed. [Figure 8] 10 is a table showing experimental results. [Figure 9] 10A and 10B are perspective views showing a shredder according to a second embodiment, where (a) is a view from above the front, and (b) is a view from above the front with the lid open and approximately half of the waste box pulled out to the front. [Figure 10] 10 is a partially enlarged cross-sectional view of a shredder according to a second embodiment, taken perpendicular to the left-right direction. FIG. [Figure 11] 10A and 10B are perspective views showing a shredder according to a third embodiment, in which FIG. 10A is a view from above the front, and FIG. 10B is a perspective view showing a state in which the device body is separated from the wastebasket section, as seen from above the front. [Figure 12]10A and 10B are perspective views of the device main body according to the third embodiment as seen from below the front, and FIG. 10B is a perspective view of the device main body as seen from above the front with the front side of the waste box section cut away. DETAILED DESCRIPTION OF THE INVENTION

[0008] <<Embodiment>> <Summary> The first shredder comprises a shredding section equipped with shredding blades for shredding supplied sheet material, a waste box section for storing shredded paper, and a metal section electrically connected to the shredding section and arranged inside the waste box section. This allows static electricity to be removed. In other words, with the simple configuration of electrically connecting the waste bin and the shredding blade, one charge accumulated on the shredding blade is neutralized with the other charge accumulated on the paper waste side, thereby eliminating static electricity from the shredding blade and its surroundings.

[0009] The second shredder is the first shredder, wherein the metal portion comprises a metal member disposed on the lower side of the inner surface of the wastebasket. This allows static electricity to be removed inexpensively.

[0010] The third shredder is the first or second shredder, wherein the waste box section is configured to be detachable from the shredding section, and when the waste box section is attached, the metal member and the shredding section are electrically connected, and when the waste box section is detached, the metal member and the shredding section are electrically disconnected. This allows the waste box section and the shredding section to be both separated and electrically connected.

[0011] The fourth shredder is a shredder such that, in the first to third shredders, the waste box section can be inserted and removed into an opening in a support section that supports the shredding section, and the waste box section has a waste box side terminal that connects to the metal member at an opposing portion that faces the periphery of the opening of the support section when inserted, and the support section has a shredding side terminal that connects to the shredding section at the periphery of the opening, and when the waste box section is inserted into the support section, the waste box side terminal comes into contact with the shredding side terminal. This allows the metal part and the shredding blade to be electrically connected or disconnected by the simple action of inserting or removing the waste box part.

[0012] A fifth shredder is any one of the first to fourth shredders, wherein at least one of the waste box side terminal and the shredder side terminal protrudes toward the other side and is elastically deformable in the protruding direction. This makes it easier for the waste box side terminal and the shredder side terminal to come into contact with each other.

[0013] The sixth shredder is any one of the first to fifth shredders, wherein the shredding side terminal is configured as a holding portion that holds the waste box portion in an inserted state. This also serves the function of holding the wastebasket in the closed position, thereby simplifying the configuration.

[0014] The seventh shredder is any one of the first to sixth shredders, in which the holding portion is provided on the periphery of the opening. This makes it easier to provide the held portion of the wastebasket that is held by the holding portion.

[0015] First Embodiment 1. Structure As shown in FIG. 1, the shredder X comprises at least a device main body 10 that shreds supplied sheet material (not shown), a waste box section 20 that stores the shredded paper, and a metal section 30 that is electrically connected to the metal member of the device main body 10 and is arranged inside the waste box section 20. This shredder X is a so-called drawer type in which the waste box section 20 is inserted into and removed from the device main body 10. Each part will be explained.

[0016] 2. Device body As shown in FIGS. 1 and 2, the device main body 10 includes a main body portion 11 having a shredding unit 15 for shredding sheet material, and a support portion 13 for supporting the main body portion 11.

[0017] (1) Main body 2, the main body 11 includes a shredding unit 15 (corresponding to an example of the shredding unit of the present invention), an upper cover 17 that covers the shredding unit 15 from above, and a lower cover 19 that covers the shredding unit 15 from below. The upper cover 17 and the lower cover 19 form a case that houses the shredding unit 15. The main body 11 also has a connection portion 12 for electrically connecting the metal member and the metal portion of the device main body 10. For convenience of distinction from the connection portion on the waste box side, the connection portion on the main body 11 side will be referred to as the shredding side connection portion, and the connection portion on the waste box side will be referred to as the waste box side connection portion.

[0018] (1-1) Shredding unit The following description will be made mainly with reference to FIGS. The shredding unit 15 comprises at least a plurality of shredding blades 150, spacers 151 arranged between the shredding blades 150, a rotating shaft 152 to which the shredding blades 150 are attached and rotatably supported, a driving means 153 for rotating the rotating shaft 152, a drive transmission means 154 for transmitting the driving force of the driving means 153 to the rotating shaft 152, and a frame 155 for supporting the rotating shaft 152, the driving means 153, and the drive transmission means 154. A plurality of shredding blades 150 are provided on a rotary shaft 152, and two rotary shafts 152 are provided in the front and rear. Here, the direction in which the rotary shafts 152 extend is defined as the left-right direction. The shredding unit 15 further includes, on the frame 155, a loading tray 156 for loading sheet material to be supplied to the shredding blades 150, a supply roller 157 for supplying the sheet material on the loading tray 156 between the front and rear shredding blades 150, and a guide member 158 for guiding the sheet material supplied by the supply roller 157 to the front and rear shredding blades 150. In other words, an auto-feeder is configured that automatically supplies sheet material on the loading tray 156. The supply roller 157 is driven to rotate using a drive means 153, and is provided with a drive transmission means 161 for the supply roller 157. The drive transmission means 161 for the supply roller 157 is attached to the right frame 155, and the drive transmission means 154 for the shredder blade 150 is attached to the left frame 155. The drive transmission means 154 for the shredder blade 150 is covered with a cover 162. The shredding unit 15 has guide members 165, 158 for guiding sheet material directly inserted by the user between the front and rear shredding blades 150. The rear guide member (158) utilizes the guide member 158 that guides the sheet material supplied by the supply roller 157. The shredding unit 15 includes a front cover 163 and a rear cover 164 that cover the front and rear shredding blades 150 from the front and rear.

[0019] (1-2) Top cover The following description will be made mainly with reference to FIGS. The upper cover 17 includes a box portion 171 that is open downward, a power switch 173 provided on the box portion 171, and an operation display portion 175 provided on the box portion 171. The box 171 has a recessed portion 171a, and the upper cover 17 has a lid 177 that can be opened and closed to cover the recessed portion 171a. In the open state, the lid 177 functions as a part of the tray for the auto feeder. The box section 171 has a recessed portion 171a with input ports 171b and 171c at the front and rear for inputting sheet materials into the shredding unit 15. The input port 171b is for an auto-feeder (automatic use), and the input port 171c is for manual use. The box portion 171 has a slit 171d in the rear wall for air-cooling the driving means 153. The power switch 173 is used to turn the power of the shredder X on and off. The operation display unit 175 includes a button for rotating the shredding blade 150 forward / reverse when the sheet material becomes jammed in the shredding unit 15, and an LED for displaying an error such as a jammed sheet material.

[0020] (1-3) Lower cover The following description will be made mainly with reference to FIGS. The lower cover 19 includes a box portion 191 that is open at the top, and a circuit unit 193 that is provided in the box portion 191. The shredding unit 15 is disposed inside the box portion 191, and is supported by a spring 181. The box portion 191 has recessed portions 191a on both the left and right sides that can be used as handles when moving the shredder X. The box portion 191 has a slit 191b in its bottom wall for air-cooling the drive means 153 and a through-hole 191h through which shredded debris passes. The through-hole 191h forms an outlet for discharging shredded debris from the main body 11. As shown in FIG. 5(a), the front wall 191j of the box section 191 has a fixing section 191c for fixing the shredding-side terminals 122 of the shredding-side connection section 12 in a state where they are exposed to the outside, and a holding section 191f for holding the inserted waste box section 20. In other words, the shredding-side terminals 122 are provided around the holding section 191f. This allows the waste box section 20 to be held around the shredding-side terminals 122, thereby improving the reliability of the electrical connection between the shredding-side terminals 122 and the waste box-side terminals 33. The holding section 191f is provided around the opening 13c of the support section 13, in this case in the recessed section 191g above the opening 13c.

[0021] (1-4) Shredding side connection part As shown in Figures 3(a) and 5(b), the shredding side connection portion 12 has a lead wire 121 whose one end is electrically connected to the metal member that constitutes the shredding unit 15, and a shredding side terminal 122 that is provided at the other end of the lead wire 121 and connects to the metal portion 30 side. A round terminal 123 is attached (crimped) to one end of the lead wire 121, and the round terminal 123 is fixed in contact with the shredding unit 15 by a screw (visor) 124. Here, it is fixed to a metal frame 155 that constitutes the shredding unit 15. The frame 155 has a rotating shaft 152 and a bearing that supports the rotating shaft 152 made of a metal material (conductive material), and is electrically connected to the shredding blade 150. As shown in Figure 5, the shredding-side terminal 122 is fixed to a fixing portion 191c of the box portion 191 of the lower cover 19 with a portion exposed from the lower cover 19. The shredding-side terminal 122 is made of a thin metal piece. As shown in the enlarged view of Figure 3, the shredding-side terminal 122 integrally comprises a U-shaped portion 125 in which one end of a pair of extension portions 125a, 125b is connected by a connecting portion 125c, and an extension portion 126 that extends from the tip of one extension portion 125a of the U-shaped portion 125 to the opposite side of the other extension portion 125b. As shown in the enlarged view of FIG. 2, the shredding-side terminal 122 is attached using a pair of through-groove portions 191d, 191e that constitute the fixing portion 191c of the lower cover 19. Specifically, the extension portion 125b of the shredding-side terminal 122 is passed from the inside of the box portion 191 to the outside through one of the through-groove portions 191d, and then the extension portion 125b is inserted again from the other through-groove portion 191e to the inside. As a result, as shown in FIG. 5, the connecting portion 125c of the U-shaped portion 125 of the shredding-side terminal 122 is positioned between the pair of through-groove portions 191d, 191e and on the outside of the lower cover 19 (see FIG. 5(a)), and the extension portion 126 of the shredding-side terminal 122 faces (contacts) the inner surface of the front wall of the lower cover 19 (see FIG. 5(b)), and the shredding-side terminal 122 is attached to the lower cover 19.

[0022] (2) Support part The following description will be made mainly with reference to FIG. 1 and FIG. 2(a). Support section 13 has a function of supporting main body section 11 and also of detachably accommodating waste box section 20. Therefore, the support section may also serve as an accommodating section. The support portion 13 has a frame 131 with open portions corresponding to the top and front surfaces, and a support plate 133 provided on the upper side of the frame 131, which may be integral with or separate from the frame 131. The support portion 13 has a main body accommodating space 13a above the support plate 133 and a waste box accommodating space (accommodating portion) 13b below the support plate 133 for accommodating the waste box portion 20. The left and right side walls of the frame 131 have notches 131 a at portions corresponding to the recessed portions 191 a of the main body 11 . Frame 131 has guide portion 131b that guides the insertion and removal of waste box portion 20. Guide portion 131b is located on the bottom wall and has a protrusion that fits into a recess (guided portion 215) in the bottom wall of waste box portion 20 and extends in the insertion and removal direction (here, the front-to-rear direction). The support plate 133 is provided so as to abut against the lower cover 19 of the main body 11 fitted from above into the frame 131. When the main body 11 is fitted into the frame 131, a protruding portion 195 (see FIG. 2(b)) at the upper end of the lower cover 19 abuts against or is close to the upper end of the frame 131. The support plate 133 is provided with a through hole 133a through which the shredded debris shredded by the shredding unit 15 passes, and a through hole 133b for air-cooling the drive means 153 of the shredding unit 15. The through hole 133a constitutes an outlet through which the shredded debris is discharged from the device main body 10. The frame 131 is provided with casters 135.

[0023] 3. Waste box section The explanation will be mainly based on Figure 1. The waste box section 20, when housed in the waste box housing space 13b of the device main body 10, receives and stores the shredded waste that has been shredded by the main body section 11 disposed above. For this reason, the waste box section 20 is box-shaped and open at the top. The waste box section 20 is configured to be detachable from the device main body 10 equipped with the shredding unit 15. Specifically, it is configured to be insertable into and detachable from the opening 13c of the support section 13 that supports the main body section 11 (shredding unit 15) equipped with the shredding unit 15. Here, the state in which the waste box section 20 is inserted into the internal waste box storage space 13b through the opening 13c of the support section 13 (the state in FIG. 1(a)) is the attached state in which the waste box section 20 is attached to the device main body 10. Conversely, the state in which the waste box section 20 is removed from the waste box storage space 13b through the opening 13c (the state in FIG. 1(b)) is the detached state in which the waste box section 20 is removed from the device main body 10.

[0024] The explanation will be given mainly with reference to FIG. The waste box section 20 includes a rear box body 21 and a front box body 22. Here, the front box body 22 constitutes the part corresponding to the front surface of the box-shaped waste box section 20. Therefore, the rear box body 21 is the box body, and the front box body 22 can also be said to be a front cover. The front box body 22 also functions as a lid that closes from the front side the waste box storage space 13b of the device main body 10 in which the waste box section 20 is stored. Therefore, the waste box section 20 is an integrated type in which the waste box and storage lid are integrated.

[0025] The rear box body 21 integrally includes a bottom wall 211, a left wall 212, a right wall 213, and a rear wall 214 (see FIG. 1(b)). The rear box 21 has a guided portion 215 on the bottom wall 211 that is guided by the guide portion 131b of the support portion 13 when the rear box 21 is inserted into or removed from the device body 10. The guided portion 215 here is configured as a recess that recesses upward. The bottom wall 211 abuts against the bottom wall of the support portion 13 of the device body 10. The rear box body 21 has reinforcing curved portions 216. Here, the curved portions 216 are provided on the upper sides of the left wall 212, the rear wall 214, and the right wall 213.

[0026] The front box body 22 has a plate portion 221 facing the rear box body 219 (rear wall 214), and protruding portions provided on the plate portion 221 so as to protrude upward, downward, leftward, and rightward beyond the periphery of the rear box body 219. In particular, the portion protruding upward is referred to as an upper protruding portion 222. The plate portion 221 has a vertically long opening in the center in the left-right direction, and this opening is covered by a transparent window portion 23 and a handle portion 24. This allows the amount of shredded waste accumulated in the waste box portion 20 to be visually observed. The front box body 22 has a held portion 25 that is held by the holding portion 191f of the main body 11 when the waste box 20 is inserted into the device main body 10. There are two holding portions 191f and two held portions 25 that are spaced apart in the left-right direction. The held portion 25 is composed of an elastic piece that grips the holding portion 191f by elastic deformation. There is a pair of elastic pieces, and the elastic piece (held portion 25) abuts against the holding portion 191f in the insertion direction. When the waste box 20 is further pushed in the insertion direction, the pair of elastic pieces elastically deform in directions separating them and grip the holding portion 191f.

[0027] 4. Metal parts The following description will be made mainly with reference to FIGS. The metal part 30 includes at least a metal member 31 disposed on the inner surface of the waste box part 20, a lead wire 32 having one end connected to the metal member 31, and a waste box side terminal 33 connected to the other end of the lead wire 32. The lead wire 32 and the waste box side terminal 33 constitute the waste box side connection part. The metal part 30 further includes a cover 34 that covers the lead wires 32 and the waste box side terminal 33 , and a part of the waste box side terminal 33 protrudes from a through hole 341 of the cover 34 . As a result, when the waste box section 20 is attached, the metal member 31 and the shredding unit 15 are electrically connected, allowing static electricity to be removed from the shredded waste, and when the waste box section 20 is detached, the metal member 31 and the shredding unit 15 are disconnected. Also, by inserting and removing (attaching and detaching) the waste box section 20, the metal member 30 and the shredding unit 15 are electrically connected and disconnected, allowing connection / disconnection to be achieved with a simple structure and improving usability for the user.

[0028] (4-1) Metallic materials The metal member 31 is made of a metal material, and its shape and form are not particularly limited. The metal member 31 can be made of a conductive material such as iron, copper, or steel. The metal member 31 can be in the form of a plate, a rod (including a straight or curved shape), a frame (including a ring), or a mesh (such as a wire mesh). Here, the device is made of a rectangular plate material, which allows it to be implemented inexpensively. The metal member 31 may be disposed on the inner surface of the waste box section 20 in any location that can come into contact with the shredded debris. For example, it may be provided on the inner surface of the bottom wall 211, left wall 212, right wall 213, rear wall 214, and front box section 22 of the rear box body 21. Here, it is disposed on the lower side of the waste box section 20. This allows for static elimination from the stage when there is little shredded debris accumulating in the waste box section 20 (when it begins to accumulate). Here, the lower side is an area that is half or less of the maximum height (here, the height of the rear box body 21) that can be used to accumulate shredded debris in the waste box section 20. More specifically, the metal member 31 is disposed on one side in the left-right direction (the right side) on the lower side of the front box body 22. The metal member 31 may be in contact with the bottom wall 211 or may be separated from it. The metal member 31 is attached by the support portion 223 of the front box body 22 in a state spaced apart from the inner surface of the front box body 22. This allows the connection point with the lead wire 32 to be on the front side (between the metal member 31 and the plate portion 221), and the lead wire 32 is not exposed inside the waste box portion 20, preventing the lead wire 32 from being cut when disposing of shredded waste, etc. The metal member 31 is attached to the front box body 22 by screws or the like (not shown).

[0029] (4-2) Lead wire The lead wire 32 has a terminal (for example, a round terminal) 35 at one end, and the terminal is attached to the metal member 31 with a screw (not shown). The lead wires 32 are arranged in the vertical direction and are covered by a cover 34. This prevents the lead wires 32 from being exposed inside the waste box 20, preventing the lead wires 32 from being cut when disposing of shredded waste, etc. The lead wires 32 are attached to the front box body 22 by screws or the like (not shown).

[0030] (4-3) Wastebasket side terminal The waste box side terminal 33 is attached to the upper extension 222. In other words, the upper extension 222 faces the upper portion (front wall 191j of the lower cover 19), which is an example of the periphery of the opening of the support part 13, and with the simple configuration of providing the waste box side terminal 33 on this upper extension 222, electrical connection / disconnection with the shredding side terminal 122 can be made simply by attaching / detaching (inserting / uninserting) the waste box part 20. The waste box side terminal 33 has a U-shaped portion 331, an upper extension portion 333 extending upward from the U-shaped portion 331, and a lower extension portion 335 extending downward from the U-shaped portion 331, and the lower extension portion 335 is connected to the lead wire 32. The U-shaped portion 331 is provided so as to protrude rearward, i.e., toward the shredding-side terminal 122 of the device main body 10, and is elastically deformable in the front-to-rear direction by the lower extension portion 335, etc. This makes it easier for the waste box portion 20 to come into contact with the shredding-side terminal 122 when inserted into the waste box storage space 13b. The waste box side terminal 33 is covered by the cover 34 with the U-shaped portion 331 protruding rearward from the through-hole 341 of the cover 34. As a result, the waste box side terminal 33 comes into contact with the shredding side terminal 122, and when the waste box section 20 is further inserted all the way, the waste box side terminal 33 elastically deforms forward. Needless to say, the contact between the waste box side terminal 33 and the shredding side terminal 122 electrically connects the metal member 31 and the shredding unit 15. The waste box side terminal 33 has a lower extension 335 attached to the front box body 22 by screws or the like (not shown).

[0031] 5. Static electricity (effect) A test was conducted on the amount of static electricity in the waste box section 20 when the metal section 30 was provided in the waste box section 20 and when the metal section 30 was not provided in the waste box section 20.

[0032] (1) Test Contents The test was performed by placing a measuring device on the front of the wastebasket 20 attached to the device main body 10, shredding a predetermined number of sheets, measuring the voltage, and checking the change. The test was also performed when a bag was placed inside the wastebasket 20. Sheet material: TANOSEE α Eco Paper Type DII ·bag Size: 45L type: 650mm x 800mm Material: High density polyethylene · Measuring Instrument · Non-contact static electricity measuring instrument AD-1684A (Manufactured by A&D Co., Ltd.) ·Metal part arrangement...Bottom right side ·Measurement environment ··· Temperature 21℃, humidity 30% Measurement: From before shredding until 10 minutes after shredding ·Material Shredding blade: Metal (steel) Spacer: Polyacetal resin (POM resin)

[0033] (2) Results (2-1) Amount of static electricity The measurement results are shown in Tables 1 and 2 in Figure 8. The tables also show the maximum values ​​during shredding. Table 1 Without bag Table 2: With bag In all of Tables 1 and 2, it was confirmed that providing the metal part 30 to the waste box part 20 reduced the amount of static electricity. (2-2) Visual inspection After 10 minutes had passed since shredding, the shredded waste in the waste box 20 was visually inspected. When the metal part 30 was not provided, shredded debris was found stuck to the inner surface of the waste box part 20 and the window part 23, but when the metal part 30 was provided, no shredded debris was found stuck to the inner surface of the waste box part 20 and the window part 23. (2-3) Disposal When discarding the shredded debris stored in the waste box section 20, if the metal section 30 was not provided, the shredded debris scattered, but if the metal section 30 was provided, the shredded debris hardly scattered.

[0034] (3) Discussion It is believed that static electricity generated around the shredding blade 150 occurs when the sheet material is shredded, with negative charges from the sheet material moving to the shredding blade 150, causing the positively charged shredded debris to stick to the shredding blade 150 (including its surrounding area), the debris box section 20 (including its surrounding area), etc., or become scattered. In the present invention, the negative charge on the shredding blade 150 is transferred to the metal part 30 via the metal rotating shaft 152, bearing, and frame 155, and then transferred from the metal part 30 to the shredded debris accumulated in the debris box part 20. This electrically neutralizes the positive charge of the shredded debris that has become positively charged during shredding and the negative charge that has transferred from the metal part 30, thereby removing static electricity. Furthermore, although the metal part 30 was placed on one side (the right side) in the left-right direction, tests confirmed that the static elimination effect was also achieved on the left side of the waste box part 20. Therefore, it can be assumed that the static elimination effect can be achieved by placing the metal part 30 in a location inside the waste box part 20 that comes into direct or indirect contact with the shredded debris. Therefore, a high static elimination effect can be achieved even if the shredded debris falls unevenly as in the prior art. Furthermore, tests have confirmed that the de-electrification effect is also achieved when a bag is placed over the waste box section 20. Furthermore, in this test example, a pattern was described in which the shredding blade is negatively charged and the sheet material is positively charged, but depending on conditions such as the materials of the shredding blade, sheet material, and surrounding components, there may also be a pattern in which the shredding blade is positively charged and the sheet material is negatively charged, but even in such cases, the negative charge moves from the shredded waste side to the shredding unit side via the metal part of the present invention, thereby achieving a de-electrification effect.

[0035] Second Embodiment As shown in Figures 9 and 10, the shredder Y comprises an apparatus main body 2010 equipped with a shredding unit 2015 that shreds supplied sheet material, a waste box section 2020 that is removably accommodated in the apparatus main body 2010, and a metal section 2030 that is electrically connected to the metal member of the shredding unit 2015 and is arranged inside the waste box section 2020. The device main body 2010 includes a shredding unit 2015 as well as a shredding side connecting portion 2012 for electrically connecting with the metal portion 2030 of the waste box portion 2020 . The device main body 2010 includes a housing 2014, and has a storage section 2016 that stores a wastebasket section 2020 in a removable (attachable) manner within the housing 2014. The device main body 2010 includes a lid 2018 on the housing 2014 that closes an entrance 2017 of the wastebasket section 2020 in the storage section 2016 in an openable and closable manner.

[0036] The shredding unit 2015 is housed in the upper part of the housing 2000. The shredding unit 2015 includes a shredding blade 2151, a rotating shaft 2152, a frame 2155 that supports the rotating shaft 2152 via a bearing (for example), a driving means 2153, and the like. The storage section 2016 has a wastebasket storage space inside the housing 2014 and below the shredding unit 2015, and stores a wastebasket section 2020 that is taken in and out through an entrance 2017 of the housing 2014. The cover 2018 opens and closes the entrance 2017 of the housing 2014, and is provided rotatable about a vertical rotation axis relative to the housing 2014. As shown in the enlarged view of Figure 10, the shredding side connection part 2012 comprises a lead wire 2121 having one end connected to a metal bearing of the shredding unit 2015, and a shredding side terminal 2122 attached to the other end of the lead wire 2121. The shredding side terminal 2122 is made of a metal plate and is elastically deformable in the direction of insertion and removal of the waste box section 2020. The shredding side terminal 2122 is covered with a cover 2124, and the connection portion protrudes from a through hole 2125 of the cover 2124 toward the waste box section 2020 side.

[0037] The waste box 2020 has a box-like shape that is open at the top. The waste box 2020 has a box-like portion 2021 and a handle hole 2022 provided in the box-like portion 2021. Here, the wastebasket section 2020 does not have the function of closing the wastebasket storage space, since the entrance 2017 of the housing 2014 is closed by the lid 2018, and is an independent type that is independent from the lid 2018.

[0038] 10, the metal portion 2030 includes a metal member 2031 disposed on the inner surface of the bottom wall of the waste box portion 2020, a lead wire 2032 having one end connected to the metal member 2031, and a waste box-side terminal 2033 connected to the other end of the lead wire 2032. The lead wire 2032 is covered with a cover 2034. The lead wire 2032 is inserted through a through-hole 2021a in the rear wall of the box-shaped portion 2021, but may also be inserted through a through-hole in the bottom wall or through-holes in the left and right walls. The waste box side terminal 2033 is formed of a thin metal plate arranged on the outer surface of the rear wall of the waste box section 2020. The waste box side terminal 2033 is provided in a position opposite to the shredding side terminal 2122 provided on the rear wall of the housing 2014, and is larger than the shredding side terminal 2122. As a result, when the waste box section 2020 is in the attached state, the metal member 2031 and the shredding unit 2015 are electrically connected, and when the waste box section 2020 is in the detached state, the metal member 2031 and the shredding unit 2015 are disconnected. In the second embodiment, the shredding-side terminal 2122 and the waste box-side terminal 2033 are arranged to be connected on the rear wall side of the waste box portion 2020, but for example, the shredding-side terminal 2122 may be provided on the inner surface of the bottom of the housing 2014, and the waste box-side terminal 2033 may be provided on the outer surface of the bottom of the box-shaped portion 2021. In this case, by arranging both terminals 2122, 2033 to be connected at the center of the bottom of the box-shaped portion 2021 and its periphery, connection is possible regardless of the insertion direction of the box-shaped portion 2021. Specifically, if the shape of the box-shaped portion 2021 is square when viewed from above, connection is possible even if the front-to-back and left-to-right orientations are reversed when inserted, and if the shape of the box-shaped portion 2021 is rectangular when viewed from above, connection is possible even if the front-to-back orientations are reversed when inserted.

[0039] <Third embodiment> As shown in Figures 11 and 12, shredder Z comprises a device main body 3010 equipped with a shredding unit 3015 that shreds supplied sheet material, a waste box section 3020 on which the device main body 3010 is placed, and a metal section 3030 electrically connected to the metal member of the shredding unit 3015 and arranged inside the waste box section 3020. The device main body 3010 includes the shredding unit 3015 as well as a shredding side connection section for electrically connecting with the metal section 3030 of the waste box section 3020 .

[0040] The shredding unit 3015 is housed in a housing 3014. The shredding unit 3015 includes a shredding blade 3151, a rotating shaft, a frame that supports the rotating shaft via bearings (for example, bushings, (ball) bearings), drive means, and the like. Housing 3014 has a plurality of grooves 3142 that guide device main body 3010 when placed in waste box section 3020. Groove sections 3142 extend in the placement direction, in this case, the vertical direction, and rib sections 3022 that are provided on the upper part of waste box section 3020 and extend in the vertical direction enter from below. As shown in Figure 12(a), the shredding side connection portion 3012 comprises a lead wire whose one end is connected to the shredding unit 3015 (e.g., a metal bearing) and a shredding side terminal (not shown) attached to the other end of the lead wire. The shredding-side terminal is made of a metal plate and is provided in groove 3142A, which is one of the multiple grooves 3142. The shredding-side terminal is provided so as to be movable upward by shredding-side terminal 3033 entering groove 3142A. Here, the shredding-side terminal is arranged so as to straddle groove 3142A, and one end is supported so as to be rotatable.

[0041] The waste box section 3020 is box-shaped and open at the top. The waste box section 3020 has a box-shaped section 3021 and a plurality of rib sections 3022 that are provided on the box-shaped section 3021 and extend upward. At least one of the plurality of rib sections 3022 extends in a stepped manner in the vertical direction and supports the device body 3010 in the placed state from below.

[0042] 12(b), metal section 3030 includes metal member 3031 disposed on the inner surface of the bottom wall of waste box section 3020, a lead wire having one end connected to metal member 3031, and waste box-side terminal 3032 connected to the other end of the lead wire. The lead wire is covered with cover 3034. Trash box side terminal 3032 is disposed on the upper part of the inner surface of trash box section 3020, and is made of a metal plate extending in the vertical direction, similar to rib section 3022. Trash box side terminal 3032 is provided in a position where it can be inserted into groove section 3142A of housing 3014. As a result, when the device main body 3010 is placed on the waste box section 3020 in an attached state, the metal member 3031 and the shredding unit 3015 are electrically connected, and when the device main body 3010 is removed from the waste box section 3020 in a detached state, the metal member 3031 and the shredding unit 3015 are disconnected.

[0043] Although the embodiments have been described above, the present invention is not limited to these embodiments, and the following modified examples may be used. Furthermore, the embodiments may be combined with each other, or an embodiment and a modified example thereof, or modified examples may be combined with each other. Furthermore, examples not described in the embodiments and modifications, and design changes within the scope of the present invention are also included in the present invention.

[0044] <<Modifications>> 1. The shredders X, Y, and Z have electric drive means, but they may also be shredders whose shredding blades are manually driven. 2. The waste box portion 20, 2020, 3020 has the metal portion 30, 2030, 3030, but the waste box itself may be made of a metal material, and the metal portion may be made of the waste box. In this case, the waste box side connecting portion is not necessary. 3. In the first embodiment, the waste box side terminal 33 is provided on the inner surface of the front box body 22, i.e., the inner surface of the waste box section 20, but it may also be provided on the outer surface of the waste box section 2020, like the waste box side terminal 2033 in the second embodiment. 4. The contact portion between the holding portion 191f and the held portion 25 may be made of a metal material (conductive material) and used as the shredding side terminal and the wastebasket side terminal. This eliminates the need to provide a shredding side terminal and a wastebasket side terminal separately from the holding mechanism, simplifying the configuration. 5. The holding mechanism consisting of the holding portion 191f and the held portion 25 utilizes a gripping structure using an elastic piece of the held portion 25, but it may also utilize, for example, a hook, a magnet, etc. When using a holding mechanism for the connection mechanism between the metal part and the shredding unit, this can be implemented by using a conductive hook or magnet. The configuration of the holding mechanism between the holding portion 191f and the held portion 25 may be reversed. That is, the holding portion side may have a gripping structure. 6. In the connection structure between the waste box side terminal 33 and the shredding side terminal 122, the waste box side terminal 33 is configured to be elastically deformable in the insertion direction (mounting direction, placing direction), but the shredding side terminal may be configured to be elastically deformable, or both the shredding side terminal and the waste box side terminal may be elastically deformable. The term "elastically deformable" includes, for example, a structure (structural body) that includes a metal body that is supported so as to be movable in the insertion / removal direction but does not elastically deform, and a biasing means that biases the metal body toward the mating side. Thus, the wastebasket-side terminal and the shredding-side terminal may be components such as a button switch with a metal body that protrudes. In other words, the term "terminal" includes metal pieces, structures that include a metal body and a biasing means, electrical components, etc.

[0045] 7. In the first embodiment, the metal part 30 is connected to the frame 155, and in the second embodiment, the metal part 2030 is connected to the bearing. The metal part only needs to be connected to a member that is electrically connected to the shredding blades 150, 2151, 3151, and may be connected to a member other than the frame or bearing. Other members include drive transmission means 154, 161 that transmit drive to the rotating shaft, and metal screws that secure the shredding unit 15 (frame 155) to the case. 8. A lead wire 121 is used as a connector electrically connecting the shredding unit 15 and the shredding side terminal 122, but it is also possible to use, for example, a metal plate, foil, mesh, or leaf spring (in which case it may also serve as the shredding side terminal). 9. The shredding-side terminal 122 is attached to the lower cover 19 by inserting its extensions 125a, 125b through a pair of through-groove portions 191d, 191e of the lower cover 19 and positioning the connecting portion 125c on the outside, but for example, a through-hole may be provided between the pair of through-groove portions 191d, 191e and fixed so that the U-shaped portion 125 protrudes outward from the through-hole. In this case, it may be configured to be elastically deformable in the protruding direction, which makes it easier to contact the waste box-side terminal 33.

[0046] 10. The waste box side terminal 33 is made of a metal plate and has a U-shaped portion 331 and a downward extension portion 335, making it elastically deformable. In other words, it has an elastically deformable shape. A coil spring, a leaf spring, etc. can also be used as a terminal having an elastically deformable shape. The waste box side terminals only need to be conductive, and may be made of conductive rubber or the like. 11. Although lead wires 32, 2032 are used as connectors for electrically connecting metal members 31, 2031, 3031 to waste box side terminals 33, 2033, 3032, it is also possible to use, for example, a metal plate, foil, mesh, or leaf spring (in which case it may also serve as the waste box side terminal), etc. [Explanation of symbols]

[0047] X Shredder 11 Main body 13 Support part 15 Shredding unit (shredding section) 20 Waste box section 30 Metal Part 31 Metallic parts 33 Wastebasket side terminal 122 Shredded side terminal

Claims

1. a shredding unit having a shredding blade for shredding the supplied sheet material; a waste box portion for storing shredded waste; a metal part electrically connected to the shredding part and disposed inside the waste box part; Equipped with Shredder.

2. The metal portion includes a metal member disposed on a lower side of the inner surface of the wastebasket.

2. The shredder of claim 1.

3. The waste box is configured to be detachable from the shredding unit, When the wastebasket is attached, the metal member and the shredding unit are electrically connected to each other. When the waste box is detached, the metal member and the shredding unit are electrically disconnected.

3. The shredder of claim 2.

4. The waste box is insertable into and removable from an opening in a support part that supports the shredding part, the wastebasket portion includes a wastebasket-side terminal connected to the metal member at a portion facing the periphery of the opening of the support portion in the inserted state; The support portion is provided with a shredding-side terminal connected to the shredding portion around the periphery of the opening, When the waste box portion is inserted into the support portion, the waste box side terminals come into contact with the shredder side terminals.

4. A shredder according to claim 2 or 3.

5. At least one of the waste box side terminal and the shredder side terminal protrudes toward the other side and is elastically deformable in the protruding direction.

5. The shredder of claim 4.

6. The shredding side terminal is configured with a holding portion that maintains the inserted state of the waste box portion.

5. The shredder of claim 4.

7. The holding portion is provided on the periphery of the opening.

7. The shredder of claim 6.

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