JP6316691B2 - Paper dust removal device - Google Patents

Description

  The present invention relates to a paper dust removing device capable of efficiently removing paper dust remaining on a cut surface formed around a sheet-like cardboard piece by connecting to a suction device. .

  Corrugated cardboard is a paper that is formed by interposing a paper (core) processed into a wave shape between a plurality of planar papers (liners) and bonding the liners with an adhesive. . Such corrugated cardboard is strong because of its structure, and is therefore used as a material for three-dimensional products such as packaging materials such as boxes and assembled toys. However, the volume of the three-dimensional product is increased in the assembled state, and damage to the corner is likely to occur when the product is delivered to the final user. It is necessary to process the cardboard into a flat component state in which a three-dimensional product can be assembled by simply bending or inserting it and shipping it to the end user. Therefore, a manufacturer of a three-dimensional product purchases a large area cardboard sheet from a paper mill, punches the cardboard sheet with a cutter (punching blade) with an automation device, and eliminates unnecessary parts, thereby Manufacture parts. Flat products that do not require the end user to process are also manufactured by punching from corrugated cardboard sheets.

  Thus, when punching with a punching blade, no consideration is given to the relative relationship between the direction of the wave of the punching blade and the core and the phase of the wave. In addition, the punching blade can cut the corrugated cardboard sheet only when the corrugated cardboard sheet is sandwiched between opposing punches and is crushed, but there are various corrugated papers that make up the core. It is bent in a shape. As a result, thread-like scraps (paper dust) may be generated by cutting the bent portion of the central core from the root.

  Such paper dust may fall off in the subsequent process or may remain until the end, but if it falls off in the subsequent process, it will cause dust, and if it does not fall off to the end, it will damage the aesthetics of the product or print It also causes mistakes.

  Therefore, the applicant removes paper dust to remove paper dust from the cut surface of a three-dimensional product part or flat product (hereinafter collectively referred to as “cardboard piece” or “workpiece”) immediately after punching. An apparatus has been proposed (Non-Patent Document 1).

  In the paper dust removing apparatus described in Non-Patent Document 1, the center is formed on both sides of a conveyor for transferring a bundle formed by stacking workpieces in a direction parallel to the plane (perpendicular to the cut surface) (horizontal direction). Cylindrical rotating brushes whose axes are oriented in the direction (vertical direction) perpendicular to the plane of the workpiece (parallel to the cut surface) are arranged, and spiral grooves are cut in the outer peripheral surface. A plurality of pairs of a cylindrical friction roller whose central axis is directed in the vertical direction and a driven roller driven by contacting the friction roller are arranged in pairs. As the material of the friction roller, it is required that the outer surface has a large friction coefficient. For example, urethane rubber or the like is used.

  In the paper dust removing device, the rotating brush first comes into contact with the cut surface of the bundle of workpieces transferred by the conveyor. Since the rotating brush rotates so as to rub the hair tip against the cut surface of the workpiece, the hair tip scrapes out paper dust from the gap between the liners of the workpieces exposed on the cut surface.

  Next, the friction roller contacts the cut surface of the bundle of workpieces. Since the friction roller rotates so that its outer peripheral surface comes into contact with the driven roller immediately after contacting the workpiece cutting surface, the paper dust scraped from the workpiece cutting surface by the rotating brush is removed from the outer peripheral surface of the friction roller. Is pulled to the point of contact with the driven roller and then picked up by being sandwiched between the two (first action). The paper powder thus picked up is sucked and collected by the airflow generated around the friction roller and the driven roller by the suction machine.

  Further, the paper dust that has entered the spiral groove on the outer surface of the friction roller moves in one direction determined by the spiral direction of the groove as the contact point with the edge of the groove moves with the rotation of the friction roller. Scraped upward or downward (second action). The paper powder scraped off in this manner is sucked and collected on the airflow generated in the groove by the suction machine.

US Engineering Co., Ltd., “Corrugated paper powder removal device”, [online], April 1, 2013, Industrial Support Division, Industrial and Labor Department, Saitama Prefecture, [Search May 13, 2013], Internet <URL: http : //www.pref.saitama.lg.jp/uploaded/attachment/381559.pdf>

  However, it has not been recognized so far that the second action exists in addition to the first action in the pair of the friction roller and the driven roller. For this reason, the structure of the friction roller and the duct communicating with the suction device was common between the one installed on the left side and the one installed on the right side of the conveyor. Therefore, the direction in which the paper dust is scraped off by the second action is reversed on the left and right. As a result, in either one of the left and right, the direction in which the paper dust is scraped by the second action matches the direction of suction, while in the other, the direction in which the paper dust is scraped by the second action and the suction direction. There is a problem that the direction does not match and the scraped paper dust does not get on the airflow and accumulates in the puddle.

  Then, even if the shape of the suction duct is the same shape on the left and right of the workpiece transfer conveyor, the problem of the present invention is that the second action by the friction roller and the driven roller in which a spiral groove is formed on the surface thereof. To provide a paper dust removing device in which the direction in which the paper dust is scraped off from the cut surface of the workpiece and the direction of suction always match, and the scraped paper dust can be efficiently sucked up without collecting in the puddle. It is in.

In order to solve the above problems, a paper dust removing device according to the present invention transports a cardboard piece in parallel with a plane including both of the cut surfaces, and each cut surface of the cardboard piece transferred by the transfer device. A pair having a plurality of bristles that are arranged so as to be rotatable about a rotation axis that faces in a direction orthogonal to the plane at positions facing each other, and that come into contact with the cutting surface facing the self in the cardboard piece as it rotates. The rotating brush, a rotating brush driving device that rotates each rotating brush, and the cardboard piece that is transferred by the transfer device downstream of the rotating brush along the transfer direction of the cardboard piece by the transfer device. Rotating about a rotation axis facing a direction perpendicular to the plane at a position facing each cutting plane, respectively A pair of friction rollers having a cylindrical outer peripheral surface that is in contact with a cutting surface facing the self of the corrugated piece and having a spiral groove formed on the outer peripheral surface, and each friction roller is rotated. At the position where the outer surface of each friction roller and the outer surface of each friction roller come into contact with each other before the 90 ° rotation after contact with the cut surface, the friction roller drive device is rotatable about a rotation axis oriented in a direction perpendicular to the plane. A pair of driven rollers that are arranged and contacted with each of the friction rollers, a negative pressure case that separates the friction rollers in contact with each other and a space behind each of the driven rollers from the outside, and the negative pressure case A duct that communicates with the suction device, and the spiral directions of the grooves cut in the outer peripheral surfaces of the pair of friction rollers are opposite to each other. In a direction in which the contact position between roller are displaced in the same direction as the direction of the suction made by the suction device through the duct, to rotate the pair of friction rollers, respectively, characterized.

  According to the present invention, even if the shape of the suction duct is the same on the left and right sides of the conveyor for transferring workpieces, the second action by the friction roller and the driven roller in which spiral grooves are formed on the surface of the suction duct is used. Since the direction in which the powder is scraped from the cut surface of the workpiece and the direction of suction always coincide, the paper powder is efficiently collected without being accumulated in the puddle.

Schematic plan view of a paper dust removing apparatus according to an embodiment of the present invention FIG. 1 is a perspective view of the brush spiral unit and the spiral unit viewed from the direction of arrow II in FIG. Front view of the brush spiral unit as seen from the direction of arrow III in FIG. FIG. 3 is a longitudinal sectional view of the brush spiral unit taken along line IV-IV in FIG. Cross-sectional view of the brush spiral unit taken along line VV in FIGS. 3 and 4 Front view of spiral unit viewed from arrow VI in FIG. FIG. 6 is a longitudinal sectional view of the spiral unit along the line VII-VII in FIG. Cross-sectional view of spiral unit along line VIII-VIII in FIGS. 6 and 7 FIG. 1 is an exploded perspective view of the brush spiral unit when viewed from the IX direction of FIG. FIG. 1 is an exploded perspective view of the spiral unit when viewed from the X direction in FIG.

  Hereinafter, an embodiment in which a paper dust removing apparatus according to the present invention is implemented will be described with reference to the drawings. The embodiment described below is merely an example of the paper dust removing device according to the present invention, and the scope of the present invention is not limited to this, and the application can be made unless it departs from the technical idea of the present invention. It is possible to implement the present invention using any material or component that sometimes exists or becomes available after filing.

  FIG. 1 is a plan view showing a layout of each paper dust removing unit (brush spiral units 1A, 1B, spiral unit 2) constituting the paper dust removing device according to the present embodiment. Actually, the paper dust removing device is entirely covered by a box-shaped housing having holes at the inlet and outlet of the workpiece W, but in order to avoid complicated drawing, FIG. The illustrations thereof are omitted.

  As shown in FIG. 1, a conveyor 3 as a transfer device is installed so as to penetrate between the inlet and the outlet of a housing (not shown). This conveyor 3 introduces the workpiece | work W which is a corrugated cardboard piece which has a cut surface in two mutually parallel outer edges from the said inlet, makes it move linearly inside the housing, and then it retreats through the said outlet. By this conveyor 3, the workpiece W is transferred from the left side to the right side in FIG. 1 in parallel with a plane including both cut surfaces.

  Two brush spiral units 1A and 1B and one spiral unit 2 are installed on the left and right sides (upper and lower sides in FIG. 1) of the conveyor 3 in order from the upstream side (left side in FIG. 1).

  FIG. 2 shows two brush spiral units 1A and 1B and one spiral unit 2 installed on the right side (lower side in FIG. 1) of the workpiece W in the direction of travel of the workpiece W. It is a perspective view which shows the state seen from the direction (however, illustration of the duct of the suction device mentioned below is omitted).

  3 is a front view showing a state in which the brush spiral units 1A and 1B installed on the left side (upper side in FIG. 1) in the traveling direction of the workpiece W are viewed in the direction of arrow III in FIG. . 4 is a longitudinal sectional view taken along line IV-IV in FIG. 3, and FIG. 5 is a transverse sectional view taken along lines VV in FIG. 3 and FIG. Also. FIG. 9 is a perspective exploded view of each brush spiral unit 1A, 1B as seen from the direction of arrow IX in FIG.

  As shown in each of these figures, each brush spiral unit 1A, 1B includes a vertically long box-shaped negative pressure case 10 whose surface facing the conveyor 3 is open, and a vertical direction inside the negative pressure case 10, respectively. A rotating brush 11, a spiral roller 12, and a steel roller 13 that are rotatably supported by a rotating shaft that faces (a direction orthogonal to a plane that includes both cut surfaces of the workpiece W), and an upper portion of the negative pressure case 10 A box-shaped coupling housing part 14 provided, a duct 15 (not shown in FIGS. 2 and 5) provided on the opposite side (back side) of the opening in the negative pressure case 10, and a coupling housing part The rotary brush drive motor 16 and the spiral roller drive motor 17 are provided on the upper surface of 14.

  The inside of the negative pressure case 10 includes two side plates 111, 112, which are respectively fixed on both side edges of the base plate 115 installed in parallel with the conveyor 3 and oriented in a direction perpendicular to the transfer direction of the workpiece W. And it is divided into two rooms by the board (supporting board 113) provided in parallel and substantially the same dimension as these both side edges 111,112. However, since the support plate 113 is arranged such that the width between the support plate 113 and the upstream side plate 111 is larger than the width between the support plate 113 and the downstream side plate 112, the upstream room is located on the downstream side. It is wider than the room. Only the upstream room has its back side closed by the partition plate 114. The widths (depths) of the side plates 111 and 112 and the column plates 113 are narrower than the depths of the top plate 141 (see FIG. 9) that also serves as the base plate 115 and the bottom plate of the coupling housing portion 14. The edges of the 112 and the support plates 113 facing the conveyor 3 are deeper than the base plate 115 and the top plate 141. And the space | interval of the edge of the both-sides board 111,112 of each pair of brush spiral unit A, 1A, 1B, 1B and the support | pillar board 113 which opposes right and left (upper and lower in FIG. The relative positions of the left and right brush spiral units 1A, 1A, 1B, and 1B are determined so as to be substantially the same as the width.

  The duct 15 is attached to the end of the taber-shaped hole in a sealing cap 151 having a back surface of the negative pressure case and an outer edge of the size and having a taber-shaped hole formed in the center thereof. Since the sealing cap 151 is fixed to the back surface of the negative pressure case 10, a downstream chamber not closed by the partition plate 114 in the negative pressure case 10 communicates with the duct 15.

  A rotating brush 11 is held in a room surrounded by the upstream side plate 111 and the column plate 113 so that the rotating shaft 11a can be rotated in the vertical direction. Specifically, one end of the rotating shaft 11 a of the rotating brush 11 is fitted in a through hole 115 a formed in the base 115 and is retained by a bearing holder 116 fixed to the lower surface of the base 115. It is supported by a pair of bearings 18 and 18. Similarly, the other end of the rotary shaft 11a is fitted into a through hole 141a formed in the top plate 141, and a set of two bearings secured by a bearing holder 117 fixed to the top surface of the top plate 141. 18 and 18 are pivotally supported. However, the other end of the rotating shaft 11a passes through the bearing holder and protrudes into the coupling housing portion 14.

The rotating brush 11 is a macroscopic cylindrical brush formed by planting a large number of hairs of the same length made of plastic, plant fiber, or animal hair radially from the rotating shaft 11a. The outer diameter of the rotating brush 11 is slightly smaller than the distance between the side plate 111 and the support plate 113. A part of the hair constituting the rotating brush 11 (hair facing the conveyor 3 side) protrudes slightly toward the conveyor 3 side than the edges of the side plates 111 and 112 and the support plate 113 facing the conveyor 3. Thus, the positions of the through holes 115a and 141a are determined.

Further, a spiral roller 12 as a friction roller is held in a room surrounded by the side plate 112 and the column plate 113 on the downstream side so that the rotating shaft 12a can be rotated in the vertical direction. Specifically, one end of the rotating shaft 12 a of the spiral roller 12 is fitted into a through hole 115 b formed in the base 115 and is retained by a bearing holder 116 fixed to the lower surface of the base 115. It is supported by a bearing 18.

Similarly, the other end of the rotary shaft 12a is fitted by a single bearing 18 that is fitted in a through hole 141b formed in the top plate 141 and secured by a bearing holder 119 fixed to the upper surface of the top plate 141. It is pivotally supported. However, the other end of the rotating shaft 12a passes through the bearing holder and protrudes into the coupling housing portion 14.

The spiral roller 12 is a cylindrical part made of a material having a large surface friction coefficient such as urethane and having a rotating shaft 12a made of a metal shaft passing through the center thereof. The material of the spiral roller 12 may be urethane, rubber, silicon, porous material, or dense body. Further, a spiral groove 12 b is carved on the outer peripheral surface of the spiral roller 12. The groove 12b may be a single groove or a plurality of grooves. Further, the width of each groove 12b may be wider or narrower than the width of the outer peripheral surface of the spiral roller 12 left between the grooves 12b. Further, the surfaces of the side plates 111 and 112 and the column plate 113 including all edges facing the conveyor 3 coincide with the tangent plane of the spiral roller 12 and only a gap corresponding to the tolerance is formed between the plate and the column plate 113. The holding positions of the through holes 115b and 141b and the bearings 18 are determined.

However, the groove 12b of the spiral roller 12 in each brush spiral unit 1A, 1B (shown in FIG. 3) installed on the left side (upper side in FIG. 1) in the traveling direction of the workpiece W is upward when viewed from below. It is cut to turn counterclockwise toward the. That is, the groove 12b is cut by the same winding method as the left screw. On the other hand, the groove 12b of the spiral roller 12 in each brush spiral unit 1, 1 (shown in FIG. 2) installed on the right side (lower side in FIG. 1) in the traveling direction of the workpiece W It is cut to turn clockwise as viewed from above. That is, the groove 12b is cut by the same winding method as that of the right screw. Thus, on the left and right sides of the conveyor 3, the winding direction of the groove 12 b of the spiral roller 12 is reversed.

Further, on the downstream side in the room surrounded by the downstream side plate 112 and the column plate 113, a steel roller 13 is held as a driven roller so as to be rotatable with its rotation axis directed in the vertical direction. . Specifically, one end of the steel roller 13 passes through a through hole 115 c formed in the base 115 and is pivoted by one bearing 18 fitted in a bearing holder 116 fixed to the lower surface of the base 115. It is supported. Similarly, the other end of the steel roller 13 passes through a through hole 141c formed in the top plate 141 and is fitted by a single bearing 18 fitted in a bearing holder 119 fixed to the upper surface of the top plate 141. It is pivotally supported. The steel roller 13 is a metal cylinder, but may be formed of other materials instead of metal. Further, the surfaces of the side plates 111 and 112 and the column plate 113 including all edges facing the conveyor 3 become the tangential plane of the steel roller 13 and the outer surfaces of the steel roller 13 and the spiral roller 12 are in contact with each other. The holding positions of the through holes 115c and 141c and the bearings 18 are determined so as to leave a gap corresponding to the tolerance between the side surfaces. That is, the position of the steel roller 13 is a position where an arbitrary portion of the outer surface of the spiral roller 12 comes into contact with the portion before the spiral roller 12 rotates 90 degrees after contacting the cut surface of the workpiece W.

Thus, there is only a clearance corresponding to the tolerance between the support plate 113 and the outer surface of the spiral roller 12 and between the steel roller 13 and the side plate 112, and the outer surface of the spiral roller 12 and the steel The outer surface of the roller 13 is in contact. As a result, when suction by a suction device (not shown) is performed through the duct 15, the atmospheric pressure in the room between the side plate 112 and the support plate 113 becomes negative, and the spiral between the support plate 113 and the spiral roller 12 and spiral. Between the roller 12 and the steel roller 13, the outside air around the conveyor 3 is sucked through only the groove 12b.

The coupling housing part 14 is fixed between the support plate 142 and the bearing holders 117 and 119 in parallel with the support plate 142 fixed to the back edge of the top plate 141 and the support plate 142. The support plate 143, the motor base plate 144 supported by the support plates 142 and 143 in parallel with the top plate 141, and the gap between the other three edges of the top plate 141 and the motor base plate 144 are respectively closed. It is composed of three cover slopes 145, 146 and 147.

The motor base plate 144 has a circular through hole 144a centered on the extension line of the rotation shaft 11a of the rotating brush 11 and a circular through hole 144b centered on the extension line of the rotation shaft 12a of the spiral roller 12. It is worn. On the upper surface of the motor base plate 144, the rotary brush driving motor 16 having the output shaft 16a inserted in the center of the through hole 114a, and the spiral roller having the output shaft 17a inserted in the center of the through hole 144b. The driving motors 17 are fixed respectively. As the motors 16 and 17, for example, induction machines can be used, but other types of motors may be used.

A coupling 148 that connects the rotating shaft 11 a of the rotating brush 11 and the output shaft 16 a of the rotating brush driving motor 16 is provided on the bearing holder 117 in the coupling housing portion 14. Similarly, a coupling 149 is provided on the bearing holder 119 to connect the rotating shaft 12 a of the spiral roller 12 and the output shaft 17 a of the spiral roller driving motor 17.

Therefore, when the rotary brush drive motor 16 rotates the output shaft 16 a, the rotary brush 11 is rotationally driven via the coupling 148. At this time, in the brush spiral units 1A, 1A on the upstream side, the left side in the moving direction of the workpiece W (upper side in FIG. 1) in order to rub the hair against the cut surface of the workpiece W in the direction opposite to the moving direction of the workpiece W. The rotating brush 11 in the brush spiral unit 1A (shown in FIG. 3 to FIG. 5) installed on the right side rotates clockwise when viewed from above, and the right side (the lower side in FIG. ) In each brush spiral unit 1A (shown in FIG. 2) rotates counterclockwise as viewed from above. That is, the rotation direction of the rotary brush driving motor 16 is reversed on the left and right sides of the conveyor 3. On the other hand, in the downstream brush spiral units 1B and 1B, in order to rub the hair against the cut surface of the workpiece W in the same direction as the workpiece W, the left side (in FIG. 1) The rotating brush 11 in the brush spiral unit 1B (shown in FIGS. 3 to 5) installed on the upper side rotates counterclockwise as viewed from above, and moves to the right side (FIG. 1) in the moving direction of the workpiece W. The rotating brush 11 in each brush spiral unit 1B (shown in FIG. 2) installed on the lower side in FIG. 2 rotates clockwise as viewed from above. Again, the rotation direction of the rotary brush drive motor 16 is reversed on the left and right sides of the conveyor 3. That is, the rotary brush drive motor 16 and the coupling 148 correspond to the rotary brush drive device. The rotary brush drive motor 16 may be shared between the left and right brush spiral units 1A, 1A, or the rotary brush drive motor 16 may be shared between the front and rear brush spiral units 1A, 1B. .

When the spiral roller driving motor 17 rotates the output shaft 17a, the spiral roller 12 is rotationally driven through the coupling 149, and the steel roller 13 in contact with the spiral roller 12 rotates in the opposite direction. At this time, each brush spiral unit installed on the left side (upper side in FIG. 1) in the traveling direction of the workpiece W so that the outer peripheral surfaces of the rollers 12 and 13 approach each other on the side facing the workpiece W. The spiral roller 12 in 1A and 1B (shown in FIGS. 3 to 5) rotates counterclockwise when viewed from above, and the steel roller 13 rotates clockwise when viewed from above. On the other hand, the spiral roller 12 in each brush spiral unit 1A, 1B (shown in FIG. 2) installed on the right side (lower side in FIG. 1) in the traveling direction of the workpiece W rotates in the clockwise direction. The steel roller 13 rotates counterclockwise as viewed from above. That is, the rotational direction of the spiral roller driving motor 17 is reversed on the left and right sides of the conveyor 3. That is, the spiral roller driving motor 17 and the coupling 149 correspond to the friction roller driving device. The spiral roller driving motor 17 may be shared between the left and right brush spiral units 1A and 1A, or the spiral roller driving motor between the front and rear brush spiral units 1A and 1B and a spiral unit 2 described later. 17 may be shared.

FIG. 6 is a front view showing a state in which the spiral unit 2 installed on the left side (upper side in FIG. 1) in the traveling direction of the workpiece W is viewed in the direction of the arrow VI in FIG. 7 is a longitudinal sectional view taken along line VII-VII in FIG. 6, and FIG. 8 is a transverse sectional view taken along lines VIII-VIII in FIGS. 6 and 7. Also. FIG. 10 is an exploded perspective view of the spiral unit 2 as seen from the direction of the arrow X in FIG.

  As shown in each of these drawings, the spiral unit 2 includes a vertically long box-shaped negative pressure case 20 whose surface facing the conveyor 3 is open, and a rotation in the vertical direction inside the negative pressure case 20. Three sets of spiral roller 22 and steel roller 23 that are rotatably supported by a shaft, a box-shaped belt accommodating portion 24 provided on the upper portion of the negative pressure case 20, and an opening in the negative pressure case 20 are opposite to each other. It is composed of a duct 25 (not shown in FIGS. 2 and 8) provided on the side (back side) and a belt drive motor 27 provided on the upper surface of the belt accommodating portion 24.

The inside of the negative pressure case 20 includes two side plates fixed on both side edges of the base plate 215 and the base plate 215 that are installed in parallel to the conveyor 3 and that face in the direction perpendicular to the transfer direction of the workpiece W. It is a single room surrounded by 211, 212 and a top plate 214 (see FIG. 10) supported in parallel with the base plate 215 by these two side plates 211, 212. Since the width (depth) of the side plates 211 and 212 is narrower than the depth of the base plate 215 and the top plate 241, the edges of the side plates 211 and 212 facing the conveyor 3 are from the base plate 215 and the top plate 241. Is also deep inside. And the space | interval of the edge of the both-sides plates 211 and 212 of the spiral units 2 and 2 and the square pillars 213, 210, and 217 which oppose right and left (upper and lower in FIG. 1) across the conveyor 3 becomes substantially the same as the width of the workpiece W. The relative positions of these spiral units 2 and 2 are determined.

  The duct 25 is attached to the end of the taber-like hole in the sealing cap 251 which has an outer edge of the size of the back surface of the negative pressure case 20 and has a taber-like hole formed in the center thereof. Since the sealing cap 251 is fixed to the back surface of the negative pressure case 20, the internal space of the negative pressure case 20 communicates with the duct 25.

And between the edge which opposes the conveyor 3 in the both-sides plates 211 and 212, three sets of the spiral roller 22 and the steel roller 23 mentioned above are arrange | positioned by equal pitch. The configurations of the spiral roller 22 and the steel roller 23 include that the direction of the spiral groove 22b cut in the outer peripheral surface of the spiral roller 22 on the left and right sides of the conveyor 3 is reversed. Since it is the same as that, its description is omitted. The spiral roller 22 located on the most upstream side is adjacent to the side plate 211 with only a gap corresponding to the tolerance. Further, the prisms 213 and 210 for maintaining a negative pressure in the negative pressure case 20 by preventing a large amount of air from flowing between each set of steel rollers 23 and the adjacent set of spiral rollers 22. Is bridged between the base 215 and the top plate 214 and fixed. Further, a prism 217 is also bridged between the base 215 and the top plate 214 and fixed between the steel roller 23 located on the most downstream side and the side wall 122.

One end of the rotating shaft 22 a of each spiral roller 22 is held in a through hole 215 b formed in the base 215, and is pivoted by a single bearing 28 that is secured to the lower surface of the base 215 by a bearing holder 216. It is supported. Similarly, the other end of the rotary shaft 22a is pivoted by a single bearing 28 held by a bearing holder 219 fitted into a through hole 241b formed in the top plate 241 and fixed to the upper surface of the top plate 241. It is supported. However, the other end of the rotating shaft 22 a passes through the bearing holder 219 and protrudes into the belt storage portion 24. Further, the through holes 115b and 141b and the bearings 18 are arranged so that the surfaces including all edges facing the conveyor 3 in the side plates 211 and 212 and the prisms 213, 210 and 217 coincide with the tangential plane of the spiral roller 22. The holding position is determined.

Further, one end of each steel roller 23 is pivotally supported by a single bearing 28 that is passed through a through hole 215c formed in the base 215 and is held by a bearing holder 216 fixed to the lower surface of the base 215. Yes. Similarly, the other end of the steel roller 23 passes through a through hole 241 c formed in the top plate 241, and is pivoted by a single bearing 28 held by a bearing holder 219 fixed to the top surface of the top plate 241. It is supported. Further, the surfaces including all edges facing the conveyor 3 on both side plates 211, 212 and each of the prisms 213, 210, 217 coincide with the tangent plane of each steel roller 23, and the outer surfaces of each steel roller 23 and spiral roller 22 are The holding positions of the through holes 215c and 241c and the bearings 28 are determined so that they contact each other.

As described above, there is a tolerance between the side plate 211 and the prisms 213 and 210 and the outer surface of the spiral roller 22 adjacent thereto, and between each steel roller 23 and the prisms 213, 210 and 217 adjacent thereto. Only a considerable gap is left, and the outer surface of each set of spiral rollers 22 and the outer surface of the steel roller 23 are in contact with each other. As a result, when suction by a suction device (not shown) is performed through the duct 25, the inside of the negative pressure case 20 becomes negative pressure, and between the side plate 211, the prisms 213 and 210 and the spiral roller 22 adjacent thereto, and each Between the pair of spiral rollers 22 and the steel rollers 23, the outside air around the conveyor 3 is sucked through only the groove 22b.

The belt storage unit 24 includes support plates 242 and 243 fixed to the back side of the bearing holders 219 and 219 on both sides on the upper surface of the top plate 241, and the support plates 242 and 243 in parallel with the top plate 241. The motor base plate 244 is supported, and four cover slopes 245, 246, 247, and 248 that block gaps between the four edges of the top plate 241 and the motor base plate 244, respectively.

A circular through hole 244b is formed in the motor base plate 244 at a position offset backward from the extension line of the rotation shaft 22a of each spiral roller 22. A spiral roller driving motor 27 having an output shaft inserted into the center of the through hole 244b is fixed to the upper surface of the motor base plate 244.

A pulley 271 is fixed to the output shaft of the spiral roller driving motor 27 inserted into the belt accommodating portion 24. Similarly, pulleys 272 are fixed to the other ends of the rotation shafts 22a of the spiral rollers 22 protruding from the bearing holders 219, respectively. A rubber belt 28 is hung between the pulley 271 and each pulley 272.

Therefore, when the spiral roller driving motor 27 rotates the output shaft and the pulley 271, each spiral roller 22 is rotationally driven through the rubber belt 28 and each pulley 272, and each steel roller 23 in contact with each spiral roller 22 is in the opposite direction. Rotate to. At this time, the spiral unit 2 (located on the left side (upper side in FIG. 1) in the traveling direction of the workpiece W so that the outer peripheral surfaces of the rollers 22 and 23 approach each other on the side facing the workpiece W. 6 to 8), the spiral roller 22 rotates counterclockwise when viewed from above, and the steel roller 23 rotates clockwise when viewed from above. On the other hand, the spiral roller 22 in the spiral unit 2 (shown in FIG. 2) installed on the right side (the lower side in FIG. 1) in the traveling direction of the workpiece W rotates clockwise, and the steel roller 23 Rotates counterclockwise when viewed from above. That is, the rotation direction of the spiral roller driving motor 27 is reversed on the left and right sides of the conveyor 3. The spiral roller driving motor 27, the pulley 271, the rubber belt 28, and each pulley 272 correspond to a friction roller driving device.

  According to the paper dust removing apparatus of the present embodiment configured as described above, the bundle of workpieces W introduced by the conveyor 3 first passes between the pair of upstream brush spiral units 1A and 1A. At this time, the bundle of workpieces W enters between the base plate 115 and the top plate 114, and the cut surfaces thereof come into contact with the edges of the side plates 111 and 112 and the column plate 113 facing the conveyor 3.

Then, the cut surface of the bundle of workpieces W first comes into contact with the rotating brush 11. At this time, as described above, since the side plates 111 and 112 and the support plate 113 protrude to the conveyor 3 side by a slight amount from the edges facing the conveyor 3, the tips of the bristles of the rotating brush 11 each work W. It enters into the gap between the constituent liners. And since the rotating brush 11 rotates so that it may rub in the direction opposite to the moving direction of the bundle | flux of the workpiece | work W, the hair of the rotating brush 11 can scrape out paper dust. As a result, the paper dust falls off from the cut surface completely or protrudes from the cut surface while leaving the connection with the core of each workpiece W at the base.

Then, as it is moved by the conveyor 3, the cross section of the bundle of workpieces W then contacts the spiral roller 12. The paper powder protruding from the cut surface of each workpiece W due to the scraping by the rotating brush 11 described above has a large friction coefficient on the outer surface of the rotating spiral roller 12, and is dragged out by the friction with the steel roller 13. It is drawn into the contact point. As a result, the paper dust is picked up by the spiral roller 12 and the steel roller 13, torn off from the core of the workpiece W, and extracted from the cut surface. The paper powder pulled out from the cut surface of the workpiece W in this way is horizontally leveled by the rollers 11 and 12 into the room surrounded by the side plate 112 and the support plate 113 in the negative pressure case 1 in which the negative pressure is maintained. It is thrown in the direction and sucked into a suction device (not shown) through the duct 15 (first action).

However, the outer surface of the spiral roller 12 is not sticky (if it has stickiness, the paper powder that has been pulled out will stick and cannot be put into the negative pressure case 1). Only by the frictional action of the outer surface of 12, the possibility of dragging out paper dust is not high. However, when the leading end of the thread paper piece enters the spiral groove cut on the outer surface of the spiral roller 12, the leading end of the paper powder may be caught on the edge of the groove. When the leading edge of the paper powder is caught on the edge of the groove in this way, the height of the edge of the groove caught on the leading edge of the paper powder increases as the spiral roller 12 rotates, so that the paper powder moves upward. It is dragged out from the cut surface of the workpiece W, torn off from the center core, and thrown into the room surrounded by the side plate 112 and the column plate 113 in the negative pressure case 1 obliquely upward, and the duct 15 Through the suction device (second action). At this time, since the duct 15 curves upward and communicates with a suction device (not shown), an airflow is generated that is sucked upward in the negative pressure case 1. The input direction coincides with the direction of the air flow, and suction is performed efficiently.

Next, the bundle of workpieces W passes between the pair of downstream brush spiral units 1B and 1B. As described above, the downstream brush spiral units 1B and 1B differ from the upstream brush spiral units 1A and 1A only in the rotation direction of the rotary brush 11. That is, since the rotating brush 11 is rotated so as to rub in the same direction as the movement direction of the bundle of workpieces W, the paper dust scraped by the rotating brush 11 of the upstream brush spiral units 1A, 1A is the root and Paper dust whose tip direction is reversed is scraped out by the rotating brush 11 of the brush spiral units 1B, 1B on the downstream side. In this way, since the upstream brush spiral units 1A and 1A and the downstream brush spiral units 1B and 1B have opposite rotation directions, the two brush spiral units 1A and 1A, By passing between 1B and 1B, almost all the paper dust is scraped from the cut surface of the workpiece W. Since the other actions of the downstream brush spiral units 1B and 1B are the same as those of the upstream brush spiral units 1A and 1A, the description thereof is omitted.

Next, the bundle of workpieces W passes between the spiral units 2 and 2. At this time, the bundle of workpieces W enters between the base plate 215 and the top plate 214, and the cut surfaces thereof contact the edges of the side plates 211, 212 and the prisms 213, 210, 217 facing the conveyor 3, respectively. To do. The action of each set of the spiral roller 22 and the steel roller 23 in the spiral units 2 and 2 is the same as that of the spiral roller 12 and the steel roller 13 in the upstream brush spiral units 1A and 1A described above. Is omitted.

As described above, according to the paper dust removing device of the present embodiment, paper powder is almost scraped from the cut surface of the workpiece W by a total of two sets of rotating brushes 11, and a total of five sets of spiral rollers 12, 22 and steel. Paper dust is almost removed by the rollers 13 and 23, and is sucked by a suction device (not shown) without staying in the puddle in the vacuum cases 10 and 20.

DESCRIPTION OF SYMBOLS 1 Brush spiral unit 2 Spiral unit 3 Conveyor 10 Negative pressure case 11 Rotary brush 12 Spiral roller 12b Groove 13 Steel roller 15 Duct 16 Rotary brush drive motor 17 Spiral roller drive motor 20 Negative pressure case 22 Spiral roller 22b Groove 23 Steel roller 25 Duct 27 Spiral roller drive motor

Claims (3)

A paper dust removing device for removing paper dust from each of the two cut surfaces of the corrugated cardboard pieces each having a cut surface at two outer edges parallel to each other,
A transfer device for transferring a cardboard piece parallel to a plane including both of the cut surfaces;
The corrugated cardboard pieces transferred by the transfer device are arranged so as to be rotatable about rotation axes oriented in a direction perpendicular to the plane at positions facing the cut surfaces, respectively, and the self-adjustment of the corrugated cardboard pieces with rotation. A pair of rotating brushes having a number of bristles in contact with the cutting surface facing
A rotating brush drive for rotating each rotating brush;
A direction orthogonal to the plane is directed at a position opposite to each cutting surface of the cardboard piece transferred by the transfer device on the downstream side of the rotating brush along the transfer direction of the cardboard piece by the transfer device. A pair of corrugated cardboard pieces each having a cylindrical outer peripheral surface that is in contact with a cutting surface facing the self and having a spiral groove cut on the outer peripheral surface. A friction roller;
A friction roller driving device for rotating each friction roller;
Each friction roller is disposed at a position where the outer surface of the friction roller comes into contact with the cutting surface and before it rotates 90 degrees, and is rotatably arranged around a rotation axis facing a direction orthogonal to the plane. A pair of driven rollers that are driven in contact with the rollers;
A negative pressure case that separates the space behind each friction roller and each driven roller that are in contact with each other from the outside;
A duct communicating with the suction device in the negative pressure case,
The spiral directions of the grooves cut on the outer peripheral surfaces of the pair of friction rollers are opposite to each other. in the direction of displacement in the same direction as the direction of the suction to be made, paper dust removing apparatus characterized by rotating the pair of friction b over La, respectively. With two pairs of the rotating brushes,
2. The paper dust removing device according to claim 1, wherein the rotating brush driving device rotates two rotating brushes in contact with the same cut surface of the cardboard piece transferred by the transfer device in opposite directions. . The friction roller driving device rotates the friction roller in the same direction as the cardboard piece transfer direction by the transfer device, and the driven roller is arranged downstream of the friction roller along the cardboard piece transfer direction. The paper dust removing device according to claim 1, wherein the paper dust removing device is provided.

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