JP5459611B2 - Stopper and chopper folding machine - Google Patents

Description

  The present invention relates to a chopper folding machine and a stopper for a chopper folding machine, and more particularly to a chopper folding machine and a stopper for a chopper folding machine that can effectively prevent damage to a workpiece during chopper folding.

  For example, a web-like workpiece (typically web-like paper) printed on an offset rotary press is then subjected to processing such as cutting and folding. As an example, the web-like workpiece is folded in half by a triangular plate (former) about an axis parallel to the transport direction (flow direction). Next, the workpiece is fed between a saw cylinder (cutting cylinder) and a receiving cylinder, and is cut every predetermined length along the conveying direction. Thereafter, each workpiece having a predetermined length is fed between the saddle cylinder and the folding cylinder and is folded around an axis orthogonal to the conveying direction. The workpiece to be folded in the direction parallel to the cutting direction in this way, that is, a so-called parallel folded booklet, is then chopper folded by a chopper folding machine.

  A typical chopper folding machine supports, for example, a conveying device that conveys a workpiece, a chopper blade that extends parallel to the conveyance direction of the workpiece, and a workpiece to be chopper-folded, as shown in Patent Document 1 And a stopper for restricting movement of the workpiece to be chopper-folded in the conveying direction. The chopper table has an elongated hole through which the chopper blade can pass. The chopper blade moves at a high speed so as to enter the hole of the chopper table, and knocks the workpiece into the hole of the chopper table. The workpiece is folded around an axis parallel to the conveyance direction, and pulled out through the hole to the lower side of the chopper table by a folding roller provided under the chopper table.

  The chopper folding process is performed, for example, about several hundred times per minute. Therefore, the conveyance of the workpiece (print book) by the conveying means is continuously performed without stopping, and the chopper folding process is performed on the workpiece to be conveyed. Then, the workpiece is chopper-folded while colliding with the stopper. In other words, the stopper of the chopper folding machine regulates the movement of the workpiece that has been chopper-folded in the conveyance direction, and guides the movement of the workpiece toward the hole on the chopper table.

JP-A-4-182268

  Conventionally, such a chopper folding machine has a problem that damage such as scratches, dents, and tears occurs at the tip of the workpiece that collides with the stopper.

  For example, in Patent Document 1, a rotatable cylindrical member is used as a stopper, and the workpiece on the chopper table is guided to the hole while the cylindrical member rotates. However, in reality, the chopper folding speed is extremely high, so that the cylindrical member cannot completely follow the moving speed of the workpiece, and conversely, the movement of the workpiece is restricted and the workpiece is damaged. obtain. Actually, the stopper disclosed in Patent Document 1 has not been widely applied to actual machines.

  In addition, other research and development has been conducted to deal with the same problem, but this problem has not been fully addressed. On the contrary, in recent years, due to consideration for environmental problems, low-strength workpieces such as thin paper and paper made of recycled materials are becoming widespread, and this problem is becoming more serious.

  The present invention has been made in consideration of such points, and provides a chopper folding machine and a stopper for a chopper folding machine that can effectively suppress damage to a workpiece during chopper folding. For the purpose.

A stopper according to an aspect of the present invention is a stopper for a chopper folding machine that choppers a workpiece to be conveyed in a first direction with a chopper blade,
A plurality of guide pieces arranged in a second direction orthogonal to the first direction and arranged at a position facing the workpiece and the first direction;
Each guide piece has a facing surface that faces the workpiece,
The opposing surface of each guide piece is formed as a curved surface in an outer region including at least an end portion on the side separated from the chopper blade in the second direction,
The curved surface forming the outer region of the opposing surface is separated from the workpiece to be conveyed in the first direction as it approaches the end portion on the side away from the chopper blade in the second direction. So that it is bent. According to such a stopper, the opposing surface in the outer region of each guide piece is configured by a curved surface that gradually warps away from the workpiece toward the outer end, so that the chopper folding process It is possible to effectively suppress the workpiece from being damaged due to the movement of the workpiece in the second direction relative to the guide piece.

  In the stopper according to one aspect of the present invention, in a cross section parallel to both the first direction and the second direction of at least one guide piece, along the second direction of the curved surface forming the outer region of the facing surface of the guide piece. The length may be longer than the length along the first direction of the curved surface forming the outer region of the facing surface of the guide piece. According to such a stopper, it can suppress more effectively that a to-be-processed body is damaged by contact with a stopper.

  In the stopper according to the aspect of the present invention, the facing surface of each guide piece is formed as a curved surface at least in an inner region including an end portion on the side close to the chopper blade in the second direction. The curved surface forming the inner region is bent so as to be separated from the workpiece to be conveyed in the first direction as it approaches the end on the side close to the chopper blade in the second direction. It may be. According to such a stopper, the opposing surface in the inner region of each guide piece is also configured by a curved surface that gradually warps away from the workpiece toward the inner end, so that the chopper folding process It is possible to more effectively suppress the workpiece from being damaged due to the movement of the workpiece in the second direction relative to the guide piece. Moreover, according to such a stopper, it can also suppress effectively that a to-be-processed body will be damaged by force being locally applied at the time of a collision with a stopper. Furthermore, in such a stopper according to one aspect of the present invention, a curved surface forming the inner region of the facing surface of the guide piece in a cross section parallel to both the first direction and the second direction of the at least one guide piece. The length along the second direction may be longer than the length along the first direction of the curved surface forming the inner region of the facing surface of the guide piece.

  Furthermore, in the stopper according to one aspect of the present invention, the curved surface forming the outer region of the facing surface and the curved surface forming the inner region of the facing surface are connected to each other, and at the connecting position, The contact surface to the curved surface that forms the outer region and the contact surface to the curved surface that forms the inner region of the opposing surface may be the same surface. According to such a stopper, it can suppress more effectively that a to-be-processed body is damaged by applying a force locally at the time of a collision with a stopper.

  Furthermore, in the stopper according to an aspect of the present invention, each of the facing surfaces of the plurality of guide pieces may be formed of a part of a side surface of a cylinder or a part of a side surface of an elliptic cylinder.

  Furthermore, in the stopper according to one aspect of the present invention, a portion of each of the facing surfaces of the plurality of guide pieces that is closest to the workpiece to be conveyed in the first direction is parallel to the second direction. It may be located on one straight line. According to such a stopper, the workpiece can be stably guided in the width direction during the chopper folding process, thereby preventing damage to the workpiece due to the contact with the stopper during the chopper folding process. It can suppress more effectively.

A chopper folding machine according to an aspect of the present invention includes:
A belt for conveying the workpiece in the first direction;
A chopper blade for chopper folding the workpiece conveyed in the first direction by the belt;
One of the stoppers according to one embodiment of the present invention described above. According to such a chopper folding machine, the opposing surface in the outer region of each guide piece is constituted by a curved surface that gradually warps away from the workpiece toward the outer end portion. It is possible to effectively suppress the workpiece from being damaged due to the movement of the workpiece in the second direction with respect to the guide piece during the folding process.

  According to the present invention, the opposing surface in the outer region of each guide piece is configured by a curved surface that gradually warps away from the workpiece toward the outer end, so that during chopper folding It is possible to effectively suppress the workpiece from being damaged due to the movement of the workpiece in the second direction relative to the guide piece.

FIG. 1 is a schematic diagram showing an overall configuration of a processing apparatus including a chopper folding machine. FIG. 2 is a perspective view showing a chopper folding machine included in the processing apparatus of FIG. FIG. 3 is a diagram for explaining the operation of the chopper folding machine and is a view showing the chopper folding machine from the front. FIG. 4 is a perspective view showing a stopper included in the chopper folding machine of FIG. 2. FIG. 5 is a bottom view showing the stopper of FIG. 4 from below. Further, in FIG. 4, the configuration of the chopper folding machine around the stopper and the workpiece are indicated by a two-dot chain line. FIG. 6 is a view for explaining a modified example of the stopper, and shows the stopper according to the modified example from below.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1-5 is a figure for demonstrating one Embodiment of the chopper folding machine and stopper by this invention. In the drawings attached to the present specification, for the sake of illustration and ease of understanding, the scale, the vertical / horizontal dimension ratio, and the like are appropriately changed and exaggerated from those of the actual product.

  As shown in FIGS. 2 and 3, the chopper folding machine 30 is a device that hits the workpiece W with a chopper blade and folds the chopper. As shown in FIG. 1, the chopper folding machine 30 is incorporated in a processing apparatus 10 that processes a web-like workpiece printed on a rotary press as a peripheral device of a rotary press (rotary press) (not shown), for example. . A processing apparatus 10 shown in FIG. 1 has a typical configuration as an apparatus disposed on the downstream side of a rotary press, and has a web-like workpiece W (for example, a web-like workpiece) that has been printed and dried. A device for cutting and folding paper. Specifically, the processing apparatus 10 shown in FIG. 1 includes a first folding mechanism 15, a cutting mechanism 20, a parallel folding mechanism 25, and a chopper folding machine 30.

  The first folding mechanism 15 includes a triangular plate (former) 16 and a nip roller 17 located on the downstream side of the triangular plate 16. The web-like workpiece W conveyed from the rotary press is folded in half by a triangular plate 16 around an axis parallel to the longitudinal direction (conveying direction, machine direction). The nip roller 17 draws out the workpiece W, which is folded by the triangular plate 16 so as to be half the width, to the downstream side.

  The cutting mechanism (cutting mechanism) 20 is provided on the downstream side of the first folding mechanism 15, and includes a saw cylinder 21 and a receiving cylinder 22 that are arranged to face each other. The web-like workpiece W passing between the saw cylinder 21 and the receiving cylinder 22 is cut along its width direction. As a result, the workpiece W has a sheet-like shape having a desired length along the conveying direction (machine direction).

  The parallel folding mechanism 25 is provided on the downstream side of the cutting mechanism (cutting mechanism) 20 and includes a folding cylinder 26 and a saddle cylinder 27 that are arranged to face each other. The sheet-like workpiece W passing between the folding cylinder 26 and the rod cylinder 27 is folded around an axis parallel to the cutting direction (cutting direction).

  As described above, a sheet-like workpiece W is obtained that is folded about an axis parallel to the transport direction and is also folded about an axis orthogonal to the transport direction. Next, the workpiece W is conveyed to the chopper folding machine 30. In addition, each structure of the processing apparatus 10 demonstrated above is only an illustration, and it can replace with the structure mentioned above, and can employ | adopt the known processing apparatus 10 which has the structure of the various aspect.

  Next, the chopper folding machine 30 will be described. As shown in FIGS. 2 and 3, the chopper folding machine 30 includes a transport mechanism 35 that transports the workpiece W, a chopper blade 40 that taps the workpiece W transported by the transport mechanism 35, and a chopper blade. It has a table 45 that supports the workpiece W to be hardened, a stopper 50 disposed on the table 45, and a pair of folding rollers 33 disposed below the table 45. Hereinafter, each configuration of the chopper folding machine 30 will be described.

  First, the transport mechanism 35 will be described. The transport mechanism 35 includes an upper belt 36a and a lower belt 36b, and a number of guide rollers 38 that guide and drive the belts 36a and 36b, respectively. Each belt 36a, 36b is wound around a plurality of guide rollers 38 as an endless belt. As shown in FIG. 1, the upper belt 36a and the lower belt 36b are arranged so as to overlap each other in one section. A workpiece (for example, a printing book) W is fed from the parallel folding mechanism 25 between the upper belt 36a and the lower belt 36b that overlap each other. The transport mechanism 35 transports the workpiece W onto the table 45 along the first direction while being sandwiched between the upper belt 36a and the lower belt 36b.

  As shown in FIG. 2, the chopper blade 40 is made of a flat plate-like member extending in the first direction, and extends in parallel with the first direction, which is the conveying direction of the workpiece W on the table 45. The chopper blade 40 has a leading edge 41 that extends linearly in the first direction. The chopper blade 40 is supported so as to be movable in a direction parallel to the normal direction nd to the upper surface of the table 45.

  As shown in FIGS. 2 and 3, the table 45 is formed with an elongated through hole 46 so as not to hinder the movement of the chopper blade 40. As shown in FIG. 3, the chopper blade 40 strikes the workpiece W at the leading edge 41 and enters the through hole 46 of the table 45 while folding the workpiece W along the leading edge 41.

  As shown in FIG. 3, the pair of folding rollers 33 have the same diameter and are arranged in parallel to each other. Further, the pair of folding rollers 33 are positioned at symmetrical positions with respect to the moving direction of the chopper blade 40. The pair of folding rollers 33 are driven so as to rotate in opposite directions, and sandwich the workpiece W that has been knocked off from the table 45 through the through-holes 46, and are configured to be drawn below the table 45. Has been.

  Next, the stopper 50 that guides the workpiece W to be chopper-folded by the chopper blade 40 in the second direction orthogonal to the first direction will be described.

  As shown in FIG. 2 and FIG. 3, in the present embodiment, the chopper folding machine 30 has a second direction on the table that is orthogonal to the first direction that is the conveying direction of the workpiece W on the table 45. Are provided with two stoppers 50 that are spaced apart from each other. The configuration and arrangement of the two stoppers 50 are symmetric with respect to the center position of the chopper folding machine 30 in the second direction.

  As shown in FIGS. 2 to 5, the stopper 50 includes a main body portion 55 having a longitudinal direction and a plurality of guide pieces 60 suspended from the lower surface 56 of the main body portion 55. The plurality of guide pieces 60 are arranged side by side along the longitudinal direction of the main body portion 55. Moreover, the stopper 50 is arrange | positioned so that the longitudinal direction of the main-body part 55 may become parallel to a 2nd direction, As a result, the several guide piece 60 is arranged along with the 2nd direction.

  The stopper 50 is supported by a support mechanism (not shown), and a first position (a position in FIG. 3) where the plurality of guide pieces 60 face the workpiece W in the first direction, and the workpiece W on the table 45. The plurality of guide pieces 60 can move between the second position where the guide pieces 60 are separated from the table 45 so as to deviate from the movement path. That is, the stopper 50 is supported so as to be movable parallel to the normal direction nd to the upper surface of the table 45. As shown in FIG. 4, the main body 55 is formed with a through-hole 53 through which a fixture (for example, a bolt) for fixing the stopper 50 to a support mechanism (not shown) passes.

  In the illustrated example, the cross-sectional shape of each guide piece 60 is constant along its length direction. That is, each guide piece 60 has a constant cross-sectional shape in an arbitrary cross section parallel to both the first direction and the second direction.

  As well shown in FIGS. 3 to 5, the plurality of guide pieces 60 are arranged away from each other, and a gap 52 is formed between two adjacent guide pieces 60. The gap 52 is disposed at a position corresponding to the movement path of the upper belt 36a and the lower belt 36b. Further, the plurality of guide pieces 60 have the same length (height) along the normal direction nd to the upper surface of the table 45. This length is equal to or greater than the sum of the thickness of the upper belt 36a and the lower belt 36b and the thickness of the workpiece W sandwiched between the belts 36a and 36b.

  In the illustrated example, when the stopper 50 is disposed at the first position, the plurality of guide pieces 60 come into contact with the upper surface of the table 45. At this time, the upper belt 36a and the lower belt 36b that overlap each other move through the gap 52 between the guide pieces 60 (see FIG. 3). On the other hand, the workpiece W disposed between the upper belt 36a and the lower belt 36b comes into contact with the stopper 50 and is prevented from proceeding in the first direction. On the other hand, when the stopper 50 is in the second position, the workpiece W is conveyed in the first direction while being held between the belts 36a and 36b without being blocked by the stopper 50.

  Here, the shape of the guide piece 60 will be described in detail. Each guide piece 60 has a facing surface 65 that faces the workpiece W being conveyed from a first direction that is the conveyance direction of the workpiece W. As shown in FIG. 5, the facing surface 65 of each guide piece 60 has an outer region (in the width direction) including an outer end portion (outer end portion in the width direction) 66 on the side separated from the chopper blade 40 in the second direction. In the outer region Ao, it is formed as a curved surface. The curved surface forming the outer region Ao of the facing surface 65 is bent so as to be separated from the workpiece W being conveyed in the first direction as it approaches the outer end 66 in the second direction. That is, the curved surface forming the outer region Ao of the facing surface 65 is bent so as to warp downstream in the conveyance direction of the workpiece W as it goes outward in the width direction.

  Further, as well shown in FIG. 5, the facing surface 65 of each guide piece 60 includes an inner end portion (an inner end portion in the width direction) 67 on the side close to the chopper blade 40 in the second direction. The inner region (inner region in the width direction) Ai is also formed as a curved surface. The curved surface forming the inner area Ai of the facing surface 65 is bent so as to be separated from the workpiece W being conveyed in the first direction as it approaches the inner end 67 in the second direction. That is, the curved surface forming the inner region Ai of the facing surface 65 is bent so as to warp downstream in the conveyance direction of the workpiece W as it goes inward in the width direction.

  Furthermore, in the present embodiment, the curved surface forming the outer region Ao of the facing surface 65 and the curved surface forming the inner region Ai of the facing surface 65 are connected. That is, all the opposing surfaces 65 are configured as curved surfaces. In particular, in the present embodiment, the curved surface forming the outer region Ao of the facing surface 65 and the curved surface forming the inner region Ai of the facing surface 65 are continuously connected. Specifically, at the position where the curved surface forming the outer region Ao and the curved surface forming the inner region Ai are connected, the contact surface of the facing surface 65 with the curved surface forming the outer region Ao and the inner region Ai of the facing surface 65 are formed. The tangent surface to the curved surface defines the same surface.

  Further, in the present embodiment, as well shown in FIG. 5, the portion of each facing surface 65 of the plurality of guide pieces 60 that is closest to the conveyed workpiece W in the first direction. 68 is positioned on one straight line parallel to the longitudinal direction of the main body 55. That is, in the present embodiment, the connecting portion 68 of the curved surface forming the outer region Ao and the curved surface forming the inner region Ai among the facing surfaces 65 of the plurality of guide pieces 60 is parallel to the longitudinal direction of the main body portion 55. As a result, it is located on one straight line parallel to the second direction.

  As well shown in FIG. 5, the surface of the guide piece 60 other than the facing surface 65 is formed as a flat plane.

  Next, the operation of the processing apparatus 10 and the chopper folding machine 30 configured as described above will be described.

  First, as shown in FIG. 1, a web-like workpiece W conveyed from a rotary press or the like is a first folding mechanism 15 of the processing apparatus 10 and has a width around an axis parallel to the conveyance direction. It is diffracted once in the width direction so as to be half. Next, the workpiece W folded so that the width is halved is conveyed to the cutting mechanism 20 and is cut every predetermined length along the conveying direction. In addition, the cutting direction by the cutting mechanism 20 is along the width direction orthogonal to the conveyance direction of the workpiece W. Next, the workpiece W cut into a single sheet is diffracted once around the axis parallel to the cutting direction by the parallel folding mechanism 25.

  As shown in FIG. 1, the sheet-like workpiece W, which is folded once in two directions orthogonal to each other as described above, is moved from the rod body 27 of the parallel folding mechanism 25 to the transport mechanism 35 of the chopper folding machine 30. It is passed between the upper belt 36a and the lower belt 36b. Thereafter, the workpiece W is conveyed in the first direction toward the table 45 while being sandwiched between the upper belt 36a and the lower belt 36b.

  When the workpiece W conveyed by the conveyance mechanism 35 is further folded by the chopper folding machine 30, the guide piece 60 of the stopper 50 comes into contact with the table 45 by the support mechanism (not shown) and the workpiece is processed. It arrange | positions in the 1st position (FIG. 2) which comes to oppose W. On the other hand, when the workpiece W transported by the transport mechanism 35 does not need to be further folded by the chopper folding machine 30, the stopper 50 is guided to the second position by the support mechanism (not shown). The entire stopper 50 including the guide piece 60 is disposed outside the movement path of the workpiece W. In this case, the workpiece W transported by the transport mechanism 35 passes through the position facing the chopper blade 40 and is collected.

  Hereinafter, the operation when the stopper 50 is disposed at the first position and the workpiece W is chopper-folded by the chopper folding machine 30 will be further described.

  As described above, the workpiece W sandwiched between the upper belt 36a and the lower belt 36b in a state where the guide piece 60 of the stopper 50 is disposed on the table 45 at a position facing the workpiece W. 45 is conveyed to the top. At this time, as shown in FIG. 2, the upper belt 36 a and the lower belt 36 b pass through a gap 52 formed between two guide pieces 60 adjacent to the stopper 50, and the belts 36 a and 36 b are moved by the stopper 50. Is not disturbed. Thereafter, the chopper blade 40 faces the table 45 when the tip Wa in the conveyance direction of the workpiece W contacts the stopper 50 or immediately before the tip Wa in the conveyance direction of the workpiece W contacts the stopper 50. The high-speed movement is started, and the workpiece W being conveyed on the table 45 comes into contact. At this time, the chopper blade 40 moves at a high speed to a position just before the tip edge 41 contacts the folding roller 33 disposed below the table 45.

  As a result, the workpiece W colliding with the tip edge 41 of the chopper blade 40 at a high speed is drawn into the through hole 46 of the table 45 together with the chopper blade 40. Further, the workpiece W is disposed below the table 45 at a portion that is in contact with the tip edge 41 of the chopper blade 40 and is forming a fold along the tip edge 41 or a portion where the fold is formed. Nipped by the folding roller 33. Then, by driving the folding roller 33, the workpiece W on the table 45 moves in a second direction orthogonal to the first direction, which is the conveying direction to the table 45, so that the through hole of the table 45 is passed. It is drawn into 46. As a result, the workpiece W that has been chopper-folded about an axis parallel to the first direction is collected downstream of the folding roller 33.

  During the chopper folding process, as described above, the stopper 50 is disposed such that the guide piece 60 faces the workpiece W on the table 45. The guide piece 60 of the stopper 50 guides (guides) the workpiece W in the second direction by the facing surface 65 while restricting the movement of the workpiece W that is chopper-folded in the first direction. become.

  By the way, such a chopper folding process is performed at a speed of several hundred to several thousand times per minute. Therefore, the moving speed of the chopper blade 40 is extremely high, and the conveying speed of the workpiece W conveyed onto the table 45 is also very high. For this reason, in the conventional chopper folding machine, the workpiece (typical) is caused by the workpiece colliding with the stopper at high speed or the tip of the workpiece is rubbed against the stopper at high speed. Specifically, damage such as crushing, tearing, and rubbing has occurred at the front end of the printing book). In particular, in recent years, the material of the workpiece (printing material) has been changed to other types, and for example, the handling of workpieces made of low-strength materials, such as recycled paper and extremely thin paper, has increased significantly. Damage to the tip Wa of the workpiece W during chopper folding is an important issue.

  However, when the stopper 50 and the chopper folding machine 30 according to the present embodiment are used, it is possible to extremely effectively suppress damage to the tip Wa of the workpiece W as described below.

  As described above, in the present embodiment, the opposing surface 65 of each guide piece 60 of the stopper 50 disposed at a position facing the workpiece W has the outer end 66 in the width direction (second direction). The outer region Ao is formed as a curved surface. The curved surface of the facing surface 65 that forms the outer region Ao is bent so as to be separated from the workpiece W being conveyed in the conveying direction (first direction) as the outer end 66 is approached in the width direction. ing. On the other hand, during the chopper folding process, the workpiece W moving in the width direction (second direction) orthogonal to the transport direction (first direction) starts to contact each guide piece 60 in the outer region Ao. become. And since the opposing surface 65 in the outer side area | region Ao of each guide piece 60 is comprised by the curved surface bent to the side spaced apart from the to-be-processed body W, a big pressure is applied to the to-be-processed body W locally. However, the contact pressure from the guide piece 60 to the workpiece W gradually increases. Thereby, the movement of the workpiece W in the width direction (second direction) relative to the guide piece 60 during the chopper folding process causes the tip Wa of the workpiece W to be damaged at the start of contact with the guide piece 60. It can be effectively prevented.

  In addition, in expecting such an effect, the curved surface forming the outer region Ao of the facing surface 65 is in a cross section parallel to both the first direction and the second direction (in a cross section parallel to the upper surface of the table 45). The length Lb1 (see FIGS. 5 and 6) along the second direction is preferably configured to be greater than the length La1 (see FIGS. 5 and 6) along the first direction. . According to such an example, the outer region Ao of the facing surface 65 is formed by a gentle curved surface having a larger radius of curvature, and a local large pressure is applied to the tip Wa of the workpiece W. Can be effectively prevented. As a specific example, the curved surface forming the outer region Ao of the facing surface 65 preferably has a radius of curvature of 10 mm or more and 120 mm or less in a cross section parallel to the upper surface of the table 45.

  Further, according to the present embodiment, the facing surface 65 of each guide piece 60 of the stopper 50 disposed at a position facing the workpiece W is not only in the outer region Ao but also in the width direction (second direction). The inner region Ai including the inner end portion 67 is also formed as a curved surface. The curved surface in the inner area Ai is also bent so as to be separated from the workpiece W being conveyed in the conveying direction (first direction) as it approaches the inner end 67 in the width direction (second direction). ing. As described above, when the outer area Ao of the facing surface 65 is a curved surface, the tip Wa of the workpiece W whose movement in the first direction is restricted is indicated by a two-dot chain line in FIG. In the outer area Ao of the opposing surface 65 of the guide piece 60, it is expected that deformation such as inclination or bending from the second direction occurs corresponding to the outline of the guide piece 60 in the outer area Ao. When the inner region Ai of the facing surface 65 is also formed as a curved surface as in the present embodiment, the deformed workpiece W is deformed by the one guide piece 60 that deforms the workpiece W. The tip Wa of the workpiece W is damaged due to contact with the inner region Ai (particularly the inner end 67) of the opposing surface 65 of the other guide piece 60 located on the outer side in the width direction. It can be effectively prevented.

  Further, the facing surface 65 in the inner region Ai of each guide piece 60 is also configured by a curved surface that gradually warps toward the inner end portion 67 toward the side away from the workpiece W. When the W collides with each guide piece 60 of the stopper 50 at a high speed, the tip Wa of the workpiece W is prevented from coming into contact with the widthwise ends 66 and 67 of the facing surface 65 of each guide piece 60. Can do. And the to-be-processed body W comes to deform | transform into a curve shape so that the outer contour of the opposing surface 65 of each guide piece 60 may be followed at the time of collision with each guide piece 60. FIG. As a result, it is avoided that a large force is locally applied to the workpiece W when the workpiece W collides with the stopper 50, and the impact due to the collision is received in a large area of the workpiece W, thereby causing high-speed collision. The large force generated due to this can be dispersed and absorbed. That is, it is possible to effectively prevent the tip Wa of the workpiece W from being damaged by a local force when the workpiece W collides with the stopper 50.

  Similar to the curved surface forming the outer region Ao, the curved surface forming the inner region Ai of the facing surface 65 defines the outer region Ao of the facing surface 65 in order to expect the effect of the curved surface forming the inner region Ai. Similar to the curved surface formed, in a cross section parallel to both the first direction and the second direction (in a cross section parallel to the upper surface of the table 45), the length Lb2 along the second direction (see FIGS. 5 and 6) is. It is preferable that the length La2 along the first direction (see FIGS. 5 and 6) is larger. According to such an example, the inner area Ai of the facing surface 65 is formed by a gentle curved surface having a larger curvature radius, and a local large pressure is applied to the tip Wa of the workpiece W. Can be effectively prevented. As a specific example, the curved surface forming the inner region Ai of the facing surface 65 preferably has a radius of curvature of 10 mm or more and 120 mm or less in a cross section parallel to the upper surface of the table 45.

  Furthermore, according to the present embodiment, the curved surface forming the outer region Ao and the curved surface forming the inner region Ai of the facing surface 65 are connected to each other, and the curved surface forming the outer region Ao is connected to each other at the connecting position. The contact surface and the contact surface to the curved surface forming the inner area Ai are the same surface. According to this embodiment, when the workpiece W collides with each guide piece 60 of the stopper 50, the tip Wa of the workpiece W corresponds to the contour of the facing surface 65 of each guide piece 60. It is possible to deform and absorb the impact caused by the collision in a large area of the workpiece W by dispersing it more uniformly. Thereby, it is possible to more effectively prevent the tip Wa of the workpiece W from being damaged due to the collision of the workpiece W with the stopper 50. In addition, such an effect can be show | played more effectively when each opposing surface 65 of the guide piece 60 becomes the same shape as a part of side surface of a cylinder, or a part of side surface of an elliptic cylinder.

  Furthermore, according to the present embodiment, a portion 68 of the opposing surfaces 65 of the plurality of guide pieces 60 that is closest to the workpiece W to be conveyed in the first direction is parallel to the second direction. Located on one straight line. Therefore, the workpiece W whose movement in the transport direction (first direction) is restricted during chopper folding can be stably guided in the width direction (second direction). Moreover, it can suppress effectively that the front-end | tip Wa of the to-be-processed body W in a chopper folding process inclines with respect to the width direction (2nd direction). Thereby, the damage of the to-be-processed body W resulting from a contact with the stopper 50, friction, etc. during a chopper folding process can be suppressed more effectively.

  As described above, according to the present embodiment, it is possible to effectively prevent the tip Wa of the workpiece W from being damaged during the chopper folding process.

  Note that various modifications can be made to the above-described embodiment. Hereinafter, an example of modification will be described.

  For example, in the above-described embodiment, the example in which the facing surface 65 of the guide piece 60 includes only the curved outer region Ao and the curved inner region Ai has been described, but the present invention is not limited thereto. For example, as shown in FIG. 6, the opposing surface 65 of the guide piece 60 may include a central region Ac located between the curved outer region Ao and the curved inner region Ai. In the example shown in FIG. 6, the facing surface 65 is formed as a flat surface parallel to the longitudinal direction (second direction) of the main body portion 55 in the central region.

  In the modification shown in FIG. 6, the contact surface with the curved surface forming the outer region Ao of the facing surface 65 is flat at the position where the outer region Ao and the central region Ac of the facing surface 65 are connected. It matches the surface. Similarly, in the modification shown in FIG. 6, the contact surface with the curved surface forming the inner region Ai of the facing surface 65 forms the central region Ac at the position where the inner region Ai and the central region Ac of the facing surface 65 are connected. It matches the flat surface.

  In addition, the curved surface forming the outer region Ao of the facing surface 65 has a length Lb1 along the second direction that is longer than the length La1 along the first direction in a cross section parallel to both the first direction and the second direction. Is configured to be larger. Similarly, in the cross section parallel to both the first direction and the second direction, the curved surface forming the inner region Ai of the facing surface 65 has a length Lb2 along the second direction that is longer than a length La2 along the first direction. Is configured to be larger.

  According to the modification shown in FIG. 6 as described above, it is possible to obtain the same operational effects as those of the above-described embodiment.

DESCRIPTION OF SYMBOLS 10 Processing apparatus 30 Chopper folding machine 33 Folding roller 35 Conveying mechanism 36a Upper belt 36b Lower belt 40 Chopper blade 45 Table 46 Through-hole 50 Stopper 55 Main part 60 Guide piece 65 Opposite surface 66 End (outer end)
67 End (inner end)

Claims (4)

A stopper for a chopper folding machine for chopper-folding a workpiece to be conveyed in a first direction with a chopper blade, wherein the workpiece is bent about an axis parallel to the first direction. Bending in advance around an axis parallel to the second direction orthogonal to the one direction,
Arranged in the second direction orthogonal to said first direction, said plurality of guide pieces which are disposed at the position facing to the first direction as the work piece, comprising,
Each guide piece has a facing surface that faces the workpiece,
The opposing surface of each guide piece is formed as a curved surface in an outer region including at least an end portion on the side separated from the chopper blade in the second direction,
The opposing surface of each guide piece is formed as a curved surface also in an inner region including an end portion on the side close to the chopper blade in at least the second direction,
The curved surface forming the outer region of the opposing surface is separated from the workpiece to be conveyed in the first direction as it approaches the end portion on the side away from the chopper blade in the second direction. Like, bent ,
The curved surface forming the inner region of the opposing surface is separated from the workpiece to be conveyed in the first direction as it approaches the end on the side close to the chopper blade in the second direction. Like, bent,
In a cross section parallel to both the first direction and the second direction of at least one guide piece, the length along the second direction of the curved surface forming the outer region of the opposing surface of the guide piece is the length of the guide piece. Longer than the length along the first direction of the curved surface forming the outer region of the opposing surface,
In a cross section parallel to both the first direction and the second direction of at least one guide piece, the length along the second direction of the curved surface forming the inner region of the facing surface of the guide piece is the length of the guide piece. Longer than the length along the first direction of the curved surface forming the inner region of the facing surface,
The curved surface forming the outer region of the opposing surface and the curved surface forming the inner region of the opposing surface are connected to each other;
At the connecting position, the contact surface to the curved surface forming the outer region of the opposing surface and the contact surface to the curved surface forming the inner region of the opposing surface are the same surface.
A stopper characterized by that. Each facing surface of the plurality of guide pieces is composed of a part of a side surface of a cylinder or a part of a side surface of an elliptic cylinder.
The stopper according to claim 1 . Of the opposing surfaces of the plurality of guide pieces, the portion that is closest to the conveyed workpiece in the first direction is located on one straight line parallel to the second direction.
The stopper according to claim 1 or 2 . A belt for conveying the workpiece in the first direction;
A chopper blade for chopper folding the workpiece conveyed in the first direction by the belt;
Comprising the stopper according to any one of claims 1 to 3 ,
A chopper folding machine characterized by that.

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