EP2511212B1 - Knife folding device - Google Patents
Knife folding device Download PDFInfo
- Publication number
- EP2511212B1 EP2511212B1 EP09852062.0A EP09852062A EP2511212B1 EP 2511212 B1 EP2511212 B1 EP 2511212B1 EP 09852062 A EP09852062 A EP 09852062A EP 2511212 B1 EP2511212 B1 EP 2511212B1
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- EP
- European Patent Office
- Prior art keywords
- sheet
- knife
- knife blade
- support surface
- attached
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000000694 effects Effects 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000000881 depressing effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H45/00—Folding thin material
- B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
- B65H45/18—Oscillating or reciprocating blade folders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/20—Location in space
- B65H2511/22—Distance
- B65H2511/222—Stroke
Definitions
- the present invention relates to a knife folding machine for folding a sheet, a sheet bundle and the like with a knife blade.
- a conventional knife folding machine generally comprises a table on which a sheet bundle is placed; a positioning means for positioning the sheet bundle at a predetermined folding position on the table; a knife blade; a pair of folding rollers opposed to the knife blade with the table therebetween at the folding position; and a slider crank mechanism.
- the slide crank mechanism reciprocates the knife blade between a first position and a second position through an opening for passing the knife blade.
- the opening is formed on the table.
- the first position is opposed to the rollers with the table therebetween and spaced from the table.
- the second position is disposed adjacent a gap between the rollers (also see, for example, Patent Documents 1 and 2).
- the knife blade has one end fixed to a rod which is connected with a crank of the slider crank mechanism. During one revolution of the crank, the knife blade reciprocates between the first position (upper dead point) and the second position (lower dead point) so as to cause a folding operation. While the knife blade moves from the first position to the second position, the sheet bundle on the table is folded in two by the knife blade, then an edge of the folded portion thereof is pushed out of the opening and inserted into the gap between the folding rollers so that the sheet bundle can be folded by the folding rollers.
- the sheet bundle consists of several sheets, and the thickness of each sheet and the number of sheets respectively varies depending on the kind of the sheet bundle so that the thickness of the sheet bundle varies.
- the second position of the knife blade should be adjusted in such a way that a distance between the second position and the gap is optimized. Because when the second position is too far away from the gap, the sheet bundle cannot be inserted into the gap. When the second position is too close to the gap, the knife blade enters the gap and stops the knife folding machine.
- the second position of the knife blade is adjusted by changing the position of the upper dead point of the slider crank mechanism.
- the change of the second position of the knife blade automatically effects the change of the first position since the stroke of the slider crank mechanism between the upper and lower dead points is constant.
- the stroke of the reciprocal movement of the knife blade is changeable depending on the kind of the sheet bundle, that is, the first and second positions of the knife blade are separately changeable.
- the first and second positions of the knife blade cannot separately be changeable.
- a rod is constantly subjected to an offset load in a direction away from the axis thereof during the folding operation since the slider crank mechanism transforms a rotary movement of a crank into a reciprocal linear movement of a rod, which leads to the deterioration of the durability of the knife folding machine.
- a knife folding machine comprising:
- control unit comprises:
- the knife folding machine further comprising:
- the knife folding machine further comprising:
- the feed means comprises:
- the knife folding machine of the present invention comprises the rod supported to reciprocate in a direction perpendicular to the support surface for supporting the lower surface of the sheet or the sheet bundle, and the feed screw disposed in parallel to the rod and supported to rotate around an axis thereof.
- the rod and the feed screw are operatively connected with each other by the block.
- the rod is fixed to the knife blade at its one end and reciprocated by the feed screw.
- the feed screw is rotated by the servomotor.
- the knife blade reciprocates between the first and second positions.
- the rod is not be subjected to the offset load in a direction away from the axis thereof during the folding operation because the rod and the feed screw are disposed in parallel to each other, so that the durability of the knife folding machine improves. Since the rod, or the knife blade is reciprocated by the feed screw which is rotated by the servomotor, the overload subjected to the knife blade can be detected by the servomotor. As a result, when each sheet bundle is sequentially fed to the fold position every time each of the folding operations is finished, the paper jam is avoided by stopping the knife blade in the course of its folding operation even if a plurality of sheet bundles are accidentally fed at a time.
- Fig. 1 is a perspective view showing a knife folding machine according to the first embodiment of the present invention, in which no sheet is not set at a fold position of the knife folding machine.
- Fig. 2 is a perspective view showing the knife folding machine according to the first embodiment of the present invention, in which a sheet is set at the fold position of the knife folding machine.
- the knife folding machine of the present invention comprises a frame 1.
- a plurality of elongated plates 2, 2a are attached to the upper surface of the frame 1 and spaced from each other widthwise.
- the upper surfaces of these plates 2, 2a construct a part of a support surface 4 for supporting a lower surface of a sheet or a sheet bundle (hereinafter generically referred to as "a sheet S").
- a pair of folding rollers 6a, 6b are opposed to a knife blade 5 with the support surface 4 therebetween at the fold position on the support surface 4.
- the knife blade 5 is disposed above the center plate 2a (the support surface 4) and the folding rollers 6a, 6b are disposed below the center plate 2a.
- the knife blade 5 may be disposed below the center plate 2a and the folding rollers 6a, 6b may be disposed above the center plate 2a.
- the folding rollers 6a, 6b are attached to the frame 1.
- the knife blade 5 and the folding rollers 6a, 6b are disposed in parallel to each other and the center plate 2a.
- a opening 3 is formed on the center plate 2a and extends longitudinally thereof.
- the knife blade 5 passes through the opening 3 and one end of the knife blade 5 is opposed to a gap between the folding rollers 6a, 6b.
- the knife folding machine comprises a knife drive unit 7.
- the knife drive unit 7 reciprocates the knife blade 5 between first and second positions through the opening 3 in a direction perpendicular to the support surface 4.
- the first position is spaced from and above the support surface 4.
- the second position is disposed adjacent the gap between the folding rollers 6a, 6b.
- the knife drive unit 7 is supported on a support arm 8 attached to the frame 1.
- Fig. 3 is a perspective view showing a knife drive unit of the knife folding machine of Fig. 1 .
- Fig. 4A is a front view showing the knife drive unit of the knife folding machine of Fig. 1 when a knife blade is disposed at the first position.
- Fig. 4B is a front view showing the knife drive unit of the knife folding machine of Fig. 1 when the knife blade is disposed at the second position.
- the knife drive unit 7 comprises a holder 9 attached to the support arm 8.
- the holder 9 has horizontal upper and lower support walls 9a, 9b which are vertically spaced from each other.
- a rod 10 extends through the upper and lower support walls 9a, 9b in a direction vertical or perpendicular to the support surface 4.
- the rod 10 is attached to the holder 9 via bearings (not shown) disposed in the upper and lower support walls 9a, 9b so as to be reciprocated in an axial direction thereof.
- the knife blade 5 is fixed on the lower end of the rod 10.
- a block 11 is fixed on a center portion of the rod 10 (the portion extends between the upper and lower support walls 9a, 9b).
- a feed screw 12 is attached to rotate around an axis thereof and extends in parallel to the rod 10 between the upper and lower support walls 9a, 9b of the holder 9.
- the block 11 has a through hole which provided with thread grooves corresponding to the feed screw 12.
- the feed screw 12 is engaged with the through hole. While the feed screw 12 rotates, the rod 10 reciprocates in a direction perpendicular to the support surface 4 through the block 11.
- the knife drive unit 7 further comprises a first pulley 13 attached to an upper end of the feed screw 12, a servomotor 14 attached to holder 9 and having a drive shaft 14a in parallel to the feed screw 12, a second pulley 15 attached to the drive shaft 14a of the servomotor 14, and a timing belt 16 extended between the first and second pulleys 13,15.
- the first pulley 13 is attached to the upper end of the feed screw 12 and driven by the servomotor 14, but the first pulley 13 may be attached to the lower end of the feed screw 12 and driven by the servomotor 14.
- the servomotor 14 is controlled by a control unit 22.
- the control unit 22 comprises a first input portion 23 for receiving input of both a data of a distance d1 (see Fig. 4A ) from the support surface 4 to the first position and a data of a distance d2 (see Fig. 4B ) from the support surface 4 to the second position.
- the control unit 22 comprises a first memory 24 for storing the datum of the distances d1, d2 through the first input portion 23.
- the first input portion 23 is formed by a lower input area 29a of a touch screen 29.
- the lower input area 29a receives input of values corrected for default values respectively corresponding to distances from the support surface 4 to the first and second positions.
- the distance d1 from the support surface 4 to the first position and the distance d2 from the support surface 4 to the second position are inputted.
- the lower input area 29a there are upper and lower numerical value columns 30a, 30b.
- the upper numerical value column 30a indicates the corrected value of the distance from the first position to the support surface 4 by 0.1 mm.
- the lower numerical value column 30b indicates the corrected value of the distance from the second position to the support surface 4 by 0.1mm.
- the control unit 22 calculates an amount of the rotation of the servomotor 14 corresponding to the distance from the first position to the second position based on the datum of the distances d1, d2 stored in the first memory 24 and controls the servomotor 14.
- the servomotor 14 rotates the feed screw 12 to reciprocate the rod 10 or the knife blade 5 between the first position (see Fig. 4A ) and the second position (see Fig. 4B ) via the block 11.
- the reciprocal movement of the knife blade 5 between the first and second positions effects a folding operation. While the knife blade 5 moves from the first position to the second position, the sheet S on the support surface 4 is folded in two by the knife blade 5, and an edge of the folded portion thereof is pushed out of the opening 3 and inserted to the gap between the folding rollers 6a, 6b so that the sheet S can be folded by the folding rollers 6a, 6b.
- the servomotor 14 rotates the feed screw 12 to reciprocate the rod 10 or the knife blade 5 between the first and second positions.
- the stroke of reciprocal movement of the knife blade 5 can easily be adjusted, and the first and second positions of the knife blade 5 can separately be adjusted by controlling the amount of the rotation of the servomotor 14.
- the rod 10 is not subjected to the offset load in a direction away from the axis thereof during the folding operation because the rod 10 and the feed screw 12 are disposed in parallel to each other, so that the durability of the knife folding machine can be improved. Since the rod 10 or the knife blade 5 is reciprocated by the feed screw 12 which is rotated by the servomotor 14, the overload subjected to the knife blade 5 is detected by the servomotor 14. As a result, when each sheet S is sequentially fed to the fold position every time each of the folding operations is finished, the paper jam between the folding rollers 6a, 6b can be avoided by stopping the knife blade 5 in the course of its folding operation even if a plurality of sheets S are accidentally fed at one time.
- the knife folding machine further comprises a feed means attached to the frame 1 to sequentially feed the sheet S to the fold position in a direction parallel to the knife blade 5 on the support surface 4.
- the feed means comprises a drive roller 17 and an idle roller 18 which are attached to the frame 1 and respectively disposed on one and the other end sides of the frame 1 below the support surface 4 (plates 2, 2a).
- Each of rotation shafts of the drive roller 17 and the idle roller 18 is disposed in parallel to each other and extends in a direction perpendicular to the knife blade 5.
- the drive roller 17 is driven by a second servomotor 19 fixed to the frame 1.
- the second servomotor 19 is controlled by the control unit 22.
- a plurality of conveyer belts 20 extend between the drive roller 17 and the idle roller 18. Two conveyer belts 20 are arranged for each of the plates 2, 2a and spaced from each other. Each of upper side portions of the conveyer belts 20 is disposed above the plates 2, 2a. As a result, a part of the support surface 4 is formed by a feed surface of the conveyer belt 20.
- the knife folding machine further comprises a positioning means attached to the frame 1 to position the sheet S at the fold position on the support surface 4.
- the positioning means comprises a stopper 21 disposed at a downstream side of the knife blade 5 and extending in a direction perpendicular to a feed path of the sheet S on the support surface 4.
- the stopper 21 positions the sheet S at the fold position by the abutment of the front end of the sheet S against the stopper 21.
- a horizontal support bar 27 is attached to the frame 1 at its opposed ends and extends in a direction perpendicular to the feed path of the sheet S at an upstream side of the opening 3 of the plate 2a.
- a sensor 28 is attached to the center of the support bar 27 to detect a passage of a tail end of the sheet S.
- the stopper 21 is movable along the feed path of the sheet S in a direction of toward and away from the sensor 28.
- the stopper 21 is disposed away from the sensor 28 by a distance (r) summed up in both of a distance (p) along the feed path of the sheet S and a predetermined distance (q).
- control unit 22 controls the second servomotor 19 by lowering the rotary speed of the second servomotor 19 in such a way that the feed speed of the sheet S gradually lowers so as to become the slowest speed just before the abutment of the sheet S against the stopper 21.
- the control unit 22 comprises a second input portion 25 for receiving input of a data of a delay time (t) from when the tail end of the sheet S passes through the sensor 28 till when the folding operation of the knife blade 5 starts, and a second memory 26 for storing the data of the delay time (t) inputted through the second input portion 25.
- the second input portion 25 is formed by an upper input area 29b of a touch screen 29.
- the upper input area 29b there is a display portion for indicating a set value of the delay time (t) in a step-by-step manner.
- a "+" button for increasing the set value
- a "-" button for decreasing the set value.
- the set values can easily be inputted by depressing these buttons on the microsecond time scale.
- the delay time (t) is a time from when the tail end of the sheet S passes through the sensor 28 till when the sheet S rebounds from the stopper 21 and stops.
- the knife blade 5 can work the sheet S only when the sheet S completely stops after its abutment against the stopper 21 and rebound, so that the sheet S can be correctly folded.
- the stopper 21 is disposed away from the sensor 28 by a distance (r) summed up in both of a distance (p) along the feed path of the sheet S and a predetermined distance (q).
- the set value of the distance (d1) from the support surface 4 to the first position, the set value of the distance (d2) from the support surface 4 to the second position and the set value of the delay time (t) are inputted through the touch screen 29, respectively.
- the knife blade 5 moves to the first position based on the set value of the distance (d1) so as to be kept in a standby condition.
- the first sheet S is conveyed to the fold position by the conveyer belts 20.
- the control unit 22 starts the time measurement after the passage of the sheet S through the sensor 28, and at the same time gradually slows the feed speed of the sheet S.
- the sheet S abuts against and rebounds from the stopper 21, and then stops at the fold position (see Fig. 2 ).
- the control unit 22 detects the delay time (t) after the passage of the sheet S through the sensor 28 and the folding operation starts, so that the knife blade 5 is moved from the first position to the second position.
- the sheet S on the support surface 4 is folded in two by the knife blade 5, and the edge of the folded portion of the sheet S is pushed out of the opening 3 and inserted to the gap between the folding rollers 6a, 6b so that the sheet S can be folded by the folding rollers 6a, 6b. Then the knife blade 5 returns from the second position to the first position. During the reciprocal movement of the knife blade 5 between the first and second positions, the folding operation is caused. The next sheet S is conveyed by the conveyer belts 20 to be fed to the fold position every time each of the folding operations is completed.
Description
- The present invention relates to a knife folding machine for folding a sheet, a sheet bundle and the like with a knife blade.
- A conventional knife folding machine generally comprises a table on which a sheet bundle is placed; a positioning means for positioning the sheet bundle at a predetermined folding position on the table; a knife blade; a pair of folding rollers opposed to the knife blade with the table therebetween at the folding position; and a slider crank mechanism. The slide crank mechanism reciprocates the knife blade between a first position and a second position through an opening for passing the knife blade. The opening is formed on the table. The first position is opposed to the rollers with the table therebetween and spaced from the table. The second position is disposed adjacent a gap between the rollers (also see, for example,
Patent Documents 1 and 2). - The knife blade has one end fixed to a rod which is connected with a crank of the slider crank mechanism. During one revolution of the crank, the knife blade reciprocates between the first position (upper dead point) and the second position (lower dead point) so as to cause a folding operation. While the knife blade moves from the first position to the second position, the sheet bundle on the table is folded in two by the knife blade, then an edge of the folded portion thereof is pushed out of the opening and inserted into the gap between the folding rollers so that the sheet bundle can be folded by the folding rollers.
- By the way, the sheet bundle consists of several sheets, and the thickness of each sheet and the number of sheets respectively varies depending on the kind of the sheet bundle so that the thickness of the sheet bundle varies. The second position of the knife blade should be adjusted in such a way that a distance between the second position and the gap is optimized. Because when the second position is too far away from the gap, the sheet bundle cannot be inserted into the gap. When the second position is too close to the gap, the knife blade enters the gap and stops the knife folding machine.
- In the case of the conventional knife blade machine, the second position of the knife blade is adjusted by changing the position of the upper dead point of the slider crank mechanism. In this case, the change of the second position of the knife blade automatically effects the change of the first position since the stroke of the slider crank mechanism between the upper and lower dead points is constant.
- In order to achieve a high-speed folding operation, it is preferable that the stroke of the reciprocal movement of the knife blade is changeable depending on the kind of the sheet bundle, that is, the first and second positions of the knife blade are separately changeable. However, in the conventional knife blade, the first and second positions of the knife blade cannot separately be changeable.
- In addition, a rod is constantly subjected to an offset load in a direction away from the axis thereof during the folding operation since the slider crank mechanism transforms a rotary movement of a crank into a reciprocal linear movement of a rod, which leads to the deterioration of the durability of the knife folding machine.
- In the conventional knife folding machine, when each sheet bundle is sequentially fed to the fold position every time each of the folding operations is completed, an overload of the knife blade cannot be detected during the folding operation even if a plurality of sheet bundles are accidentally fed at a time. As a result, the movement of the knife blade cannot be stopped but continued to cause a paper jam between the folding rollers, and the folding operation is interrupted for a long time.
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- Patent Document 1:
US4,568,319 - Patent Document 2:
JP 2007-91473 - It is an object of the present invention to provide a knife folding machine which can separately change the positions of the opposite ends of the reciprocal movement of the knife blade, and achieve a high-speed folding operation and an excellent durability.
- It is another object of the present invention to provide a knife folding machine having the function of detecting the overload of the knife blade during the folding operation.
- In order to achieve the objects, the present invention provides a knife folding machine, comprising:
- a frame having a support surface to support a lower surface of a sheet or a sheet bundle;
- a positioning means attached to the frame to position the sheet or the sheet bundle at a fold position on the support surface;
- a knife blade;
- a pair of folding rollers opposed to the knife blade with the support surface therebetween at the fold position, the folding rollers being attached to the frame, the knife blade and the folding rollers being disposed in parallel to each other, an edge of the knife blade being opposed to a gap between the folding rollers, the support surface having a opening through which the knife blade passes;
- a knife drive unit for reciprocating the knife blade in a direction perpendicular to the support surface through the opening between a first position and a second position, the first position being opposed to the folding rollers with the support surface therebetween and spaced from the support surface, the second position being disposed adjacent the gap between the folding rollers;
- a support arm attached to the frame to support the knife drive unit; and
- a control unit for controlling the knife drive unit; wherein
- the reciprocal movement of the knife blade between the first and second positions effects a folding operation, wherein
- while the knife blade moves from the first position to the second position, the sheet or the sheet bundle on the support surface being folded in two by the knife blade, an edge of the folded portion thereof being pushed out of the opening and inserted to the gap between the folding rollers so that the sheet or the sheet bundle can be folded by the folding rollers; and wherein
- the knife drive unit comprises:
- a holder attached to the support arm;
- a rod extending in a direction perpendicular to the support surface and attached to the holder to reciprocate in an axial direction thereof, the rod having one end attached to the knife blade;
- a block attached to a center portion of the rod;
- a feed screw extending in parallel to the rod and attached to the holder to rotate around an axis thereof, the block having a thorough hole which has thread grooves corresponding to the feed screw, the feed screw engaging with the through hole, the rod being reciprocated by the rotation of the feed screw;
- a first pulley attached to an upper or lower end of the feed screw;
- a servomotor attached to the holder and having a drive shaft, the drive shaft extending in parallel to the feed screw;
- a second pulley attached to the drive shaft of the servomotor; and
- a timing belt extended between the first and second pulleys, the servomotor being controlled by the control unit.
- According to a preferred embodiment of the present invention, the control unit comprises:
- a first input portion for receiving input of both a data of a distance (d1) from the support surface to the first position and a data of a distance (d2) from the support surface to the second position; and
- a first memory for storing the datum of the distances (d1, d2) inputted through the first input portion; and wherein
- the control unit controls the servomotor based on the datum of the distances (d1, d2) stored in the first memory.
- According to further preferred embodiment of the present invention, the knife folding machine further comprising:
- a feed means attached to the frame to sequentially feed the sheet or the sheet bundle to the fold position in a direction parallel or perpendicular to the knife blade on the support surface; wherein
- the positioning means comprises a stopper disposed on a downstream side of the knife blade and extending in a direction perpendicular to a feed path of the sheet or the sheet bundle on the support surface, the stopper positioning the sheet or the sheet bundle at the fold position by the abutment of the front end of the sheet or the sheet bundle against the stopper.
- According to further preferred embodiment of the present invention, the knife folding machine further comprising:
- a sensor disposed in the middle way of the feed path of the sheet or the sheet bundle to detect a passage of a tail end of the sheet or the sheet bundle; wherein
- the stopper is movable along the feed path in a direction of toward and away from the sensor and disposed away from the sensor a distance (r) summed up in both of a distance (p) along the feed path of the sheet or the sheet bundle and a predetermined distance (q); wherein
- the control unit comprises:
- a second input portion for receiving input of a data of a delay time from when the tail end of the sheet or the sheet bundle (S) passes through the sensor till when the folding operation of the knife blade (5) starts; and
- a second memory for storing the data of the delay time (t) inputted through the second input portion; and wherein
- the control unit controls the servomotor of the knife drive unit based on a detecting data from the sensor and the data of the delay time (t) stored in the second memory.
- According to further preferred embodiment of the present invention, the feed means comprises:
- a drive roller and an idle roller attached to the frame and spaced from and in parallel to each other;
- at least one conveyer belt extending between the drive roller and idle roller; and
- a second servomotor attached to the frame to rotate the drive roller; wherein
- a part of the support surface is formed by a feed surface of the conveyer belt, each of rotation shafts of the drive roller and idle roller being disposed in parallel or vertical to the knife blade.
- The knife folding machine of the present invention comprises the rod supported to reciprocate in a direction perpendicular to the support surface for supporting the lower surface of the sheet or the sheet bundle, and the feed screw disposed in parallel to the rod and supported to rotate around an axis thereof. The rod and the feed screw are operatively connected with each other by the block. The rod is fixed to the knife blade at its one end and reciprocated by the feed screw. The feed screw is rotated by the servomotor. Thus the knife blade reciprocates between the first and second positions. As a result, it is possible to easily adjust the stroke of the reciprocal movement of the knife blade, and separately adjust the first and second positions thereof by controlling the amount of the rotation of the servomotor.
- Further in the present invention, the rod is not be subjected to the offset load in a direction away from the axis thereof during the folding operation because the rod and the feed screw are disposed in parallel to each other, so that the durability of the knife folding machine improves. Since the rod, or the knife blade is reciprocated by the feed screw which is rotated by the servomotor, the overload subjected to the knife blade can be detected by the servomotor. As a result, when each sheet bundle is sequentially fed to the fold position every time each of the folding operations is finished, the paper jam is avoided by stopping the knife blade in the course of its folding operation even if a plurality of sheet bundles are accidentally fed at a time.
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Fig. 1 is a perspective view showing a knife folding machine according to the first embodiment of the present invention, in which no sheet is set at a fold position of the knife folding machine. -
Fig. 2 is a perspective view showing the knife folding machine according to the first embodiment of the present invention, in which a sheet is set at the fold position of the knife folding machine. -
Fig. 3 is a perspective view showing a knife drive unit of the knife folding machine ofFig. 1 . -
Fig. 4A is a front view showing the knife drive unit of the knife folding machine ofFig. 1 when a knife blade is disposed at a first position. -
Fig. 4B is a front view showing the knife drive unit of the knife folding machine ofFig. 1 when the knife blade is disposed at a second position. -
Fig. 5 is a plan view showing a touch screen as a first and second input portions of the knife folding machine ofFig. 1 . - A preferred embodiment of the present invention will be explained below with reference to the accompanying drawings.
Fig. 1 is a perspective view showing a knife folding machine according to the first embodiment of the present invention, in which no sheet is not set at a fold position of the knife folding machine.Fig. 2 is a perspective view showing the knife folding machine according to the first embodiment of the present invention, in which a sheet is set at the fold position of the knife folding machine. As shown inFigs. 1 and2 , the knife folding machine of the present invention comprises aframe 1. A plurality ofelongated plates frame 1 and spaced from each other widthwise. The upper surfaces of theseplates support surface 4 for supporting a lower surface of a sheet or a sheet bundle (hereinafter generically referred to as "a sheet S"). - A pair of
folding rollers knife blade 5 with thesupport surface 4 therebetween at the fold position on thesupport surface 4. In this embodiment, theknife blade 5 is disposed above thecenter plate 2a (the support surface 4) and thefolding rollers center plate 2a. In another embodiment, theknife blade 5 may be disposed below thecenter plate 2a and thefolding rollers center plate 2a. - The
folding rollers frame 1. Theknife blade 5 and thefolding rollers center plate 2a. Aopening 3 is formed on thecenter plate 2a and extends longitudinally thereof. Theknife blade 5 passes through theopening 3 and one end of theknife blade 5 is opposed to a gap between thefolding rollers - The knife folding machine comprises a
knife drive unit 7. Theknife drive unit 7 reciprocates theknife blade 5 between first and second positions through theopening 3 in a direction perpendicular to thesupport surface 4. The first position is spaced from and above thesupport surface 4. The second position is disposed adjacent the gap between thefolding rollers knife drive unit 7 is supported on asupport arm 8 attached to theframe 1. -
Fig. 3 is a perspective view showing a knife drive unit of the knife folding machine ofFig. 1 .Fig. 4A is a front view showing the knife drive unit of the knife folding machine ofFig. 1 when a knife blade is disposed at the first position.Fig. 4B is a front view showing the knife drive unit of the knife folding machine ofFig. 1 when the knife blade is disposed at the second position. - As shown in
Figs. 3 and4 , theknife drive unit 7 comprises aholder 9 attached to thesupport arm 8. Theholder 9 has horizontal upper andlower support walls rod 10 extends through the upper andlower support walls support surface 4. Therod 10 is attached to theholder 9 via bearings (not shown) disposed in the upper andlower support walls knife blade 5 is fixed on the lower end of therod 10. Ablock 11 is fixed on a center portion of the rod 10 (the portion extends between the upper andlower support walls - A
feed screw 12 is attached to rotate around an axis thereof and extends in parallel to therod 10 between the upper andlower support walls holder 9. Theblock 11 has a through hole which provided with thread grooves corresponding to thefeed screw 12. Thefeed screw 12 is engaged with the through hole. While thefeed screw 12 rotates, therod 10 reciprocates in a direction perpendicular to thesupport surface 4 through theblock 11. - The
knife drive unit 7 further comprises afirst pulley 13 attached to an upper end of thefeed screw 12, aservomotor 14 attached toholder 9 and having adrive shaft 14a in parallel to thefeed screw 12, asecond pulley 15 attached to thedrive shaft 14a of theservomotor 14, and atiming belt 16 extended between the first andsecond pulleys - In this embodiment, the
first pulley 13 is attached to the upper end of thefeed screw 12 and driven by theservomotor 14, but thefirst pulley 13 may be attached to the lower end of thefeed screw 12 and driven by theservomotor 14. - The
servomotor 14 is controlled by acontrol unit 22. - The
control unit 22 comprises afirst input portion 23 for receiving input of both a data of a distance d1 (seeFig. 4A ) from thesupport surface 4 to the first position and a data of a distance d2 (seeFig. 4B ) from thesupport surface 4 to the second position. Thecontrol unit 22 comprises afirst memory 24 for storing the datum of the distances d1, d2 through thefirst input portion 23. - In this embodiment, as shown in
Fig. 5 , thefirst input portion 23 is formed by alower input area 29a of atouch screen 29. In this embodiment, thelower input area 29a receives input of values corrected for default values respectively corresponding to distances from thesupport surface 4 to the first and second positions. Thus the distance d1 from thesupport surface 4 to the first position and the distance d2 from thesupport surface 4 to the second position are inputted. In thelower input area 29a there are upper and lowernumerical value columns numerical value column 30a indicates the corrected value of the distance from the first position to thesupport surface 4 by 0.1 mm. The lowernumerical value column 30b indicates the corrected value of the distance from the second position to thesupport surface 4 by 0.1mm. - At the right side of the
numerical value columns - The
control unit 22 calculates an amount of the rotation of theservomotor 14 corresponding to the distance from the first position to the second position based on the datum of the distances d1, d2 stored in thefirst memory 24 and controls theservomotor 14. - The
servomotor 14 rotates thefeed screw 12 to reciprocate therod 10 or theknife blade 5 between the first position (seeFig. 4A ) and the second position (seeFig. 4B ) via theblock 11. - The reciprocal movement of the
knife blade 5 between the first and second positions effects a folding operation. While theknife blade 5 moves from the first position to the second position, the sheet S on thesupport surface 4 is folded in two by theknife blade 5, and an edge of the folded portion thereof is pushed out of theopening 3 and inserted to the gap between thefolding rollers folding rollers - According to the present invention, the
servomotor 14 rotates thefeed screw 12 to reciprocate therod 10 or theknife blade 5 between the first and second positions. As a result, the stroke of reciprocal movement of theknife blade 5 can easily be adjusted, and the first and second positions of theknife blade 5 can separately be adjusted by controlling the amount of the rotation of theservomotor 14. - Further in the present invention, the
rod 10 is not subjected to the offset load in a direction away from the axis thereof during the folding operation because therod 10 and thefeed screw 12 are disposed in parallel to each other, so that the durability of the knife folding machine can be improved. Since therod 10 or theknife blade 5 is reciprocated by thefeed screw 12 which is rotated by theservomotor 14, the overload subjected to theknife blade 5 is detected by theservomotor 14. As a result, when each sheet S is sequentially fed to the fold position every time each of the folding operations is finished, the paper jam between thefolding rollers knife blade 5 in the course of its folding operation even if a plurality of sheets S are accidentally fed at one time. - The knife folding machine further comprises a feed means attached to the
frame 1 to sequentially feed the sheet S to the fold position in a direction parallel to theknife blade 5 on thesupport surface 4. - In this embodiment, the feed means comprises a
drive roller 17 and anidle roller 18 which are attached to theframe 1 and respectively disposed on one and the other end sides of theframe 1 below the support surface 4 (plates drive roller 17 and theidle roller 18 is disposed in parallel to each other and extends in a direction perpendicular to theknife blade 5. Thedrive roller 17 is driven by asecond servomotor 19 fixed to theframe 1. Thesecond servomotor 19 is controlled by thecontrol unit 22. - A plurality of
conveyer belts 20 extend between thedrive roller 17 and theidle roller 18. Twoconveyer belts 20 are arranged for each of theplates conveyer belts 20 is disposed above theplates support surface 4 is formed by a feed surface of theconveyer belt 20. - The knife folding machine further comprises a positioning means attached to the
frame 1 to position the sheet S at the fold position on thesupport surface 4. In this embodiment, the positioning means comprises astopper 21 disposed at a downstream side of theknife blade 5 and extending in a direction perpendicular to a feed path of the sheet S on thesupport surface 4. Thestopper 21 positions the sheet S at the fold position by the abutment of the front end of the sheet S against thestopper 21. - A
horizontal support bar 27 is attached to theframe 1 at its opposed ends and extends in a direction perpendicular to the feed path of the sheet S at an upstream side of theopening 3 of theplate 2a. Asensor 28 is attached to the center of thesupport bar 27 to detect a passage of a tail end of the sheet S. - The
stopper 21 is movable along the feed path of the sheet S in a direction of toward and away from thesensor 28. Thestopper 21 is disposed away from thesensor 28 by a distance (r) summed up in both of a distance (p) along the feed path of the sheet S and a predetermined distance (q). - After the passage of the tail end of the sheet S, the
control unit 22 controls thesecond servomotor 19 by lowering the rotary speed of thesecond servomotor 19 in such a way that the feed speed of the sheet S gradually lowers so as to become the slowest speed just before the abutment of the sheet S against thestopper 21. - The
control unit 22 comprises asecond input portion 25 for receiving input of a data of a delay time (t) from when the tail end of the sheet S passes through thesensor 28 till when the folding operation of theknife blade 5 starts, and asecond memory 26 for storing the data of the delay time (t) inputted through thesecond input portion 25. - In this embodiment, as shown in
Fig. 5 , thesecond input portion 25 is formed by anupper input area 29b of atouch screen 29. In theupper input area 29b there is a display portion for indicating a set value of the delay time (t) in a step-by-step manner. At the right side of the display portion there is a "+" button for increasing the set value, meanwhile, at the left side thereof there is a "-" button for decreasing the set value. The set values can easily be inputted by depressing these buttons on the microsecond time scale. - The delay time (t) is a time from when the tail end of the sheet S passes through the
sensor 28 till when the sheet S rebounds from thestopper 21 and stops. By use of the delay time (t) theknife blade 5 can work the sheet S only when the sheet S completely stops after its abutment against thestopper 21 and rebound, so that the sheet S can be correctly folded. - Thus before the folding operation of the knife blade machine starts, the
stopper 21 is disposed away from thesensor 28 by a distance (r) summed up in both of a distance (p) along the feed path of the sheet S and a predetermined distance (q). The set value of the distance (d1) from thesupport surface 4 to the first position, the set value of the distance (d2) from thesupport surface 4 to the second position and the set value of the delay time (t) are inputted through thetouch screen 29, respectively. Theknife blade 5 moves to the first position based on the set value of the distance (d1) so as to be kept in a standby condition. - Then the folding operation of the knife folding machine starts. The first sheet S is conveyed to the fold position by the
conveyer belts 20. When thesensor 28 detects the passage of the tail end of the sheet S, thecontrol unit 22 starts the time measurement after the passage of the sheet S through thesensor 28, and at the same time gradually slows the feed speed of the sheet S. The sheet S abuts against and rebounds from thestopper 21, and then stops at the fold position (seeFig. 2 ). Soon after that, thecontrol unit 22 detects the delay time (t) after the passage of the sheet S through thesensor 28 and the folding operation starts, so that theknife blade 5 is moved from the first position to the second position. - During the movement, the sheet S on the
support surface 4 is folded in two by theknife blade 5, and the edge of the folded portion of the sheet S is pushed out of theopening 3 and inserted to the gap between thefolding rollers folding rollers knife blade 5 returns from the second position to the first position. During the reciprocal movement of theknife blade 5 between the first and second positions, the folding operation is caused. The next sheet S is conveyed by theconveyer belts 20 to be fed to the fold position every time each of the folding operations is completed. -
- 1
- frame
- 2
- plate
- 2a
- center plate
- 3
- opening
- 4
- support surface
- 5
- knife blade
- 6a, 6b
- folding rollers
- 7
- knife drive unit
- 8
- support arm
- 9
- holder
- 9a
- upper support wall
- 9b
- lower support wall
- 10
- rod
- 11
- block
- 12
- feed screw
- 13
- first pulley
- 14
- servomotor
- 14a
- drive shaft
- 15
- second pulley
- 16
- timing belt
- 17
- drive roller
- 18
- idle roller
- 19
- servomotor
- 20
- conveyer belt
- 21
- stopper
- 22
- control unit
- 23
- first input portion
- 24
- first memory
- 25
- second input portion
- 26
- second memory
- 27
- support bar
- 28
- sensor
- 29
- touch screen
- 29a
- lower input area
- 29b
- upper input area
- 30a, 30b
- numerical value column
- S
- sheet
Claims (5)
- A knife folding machine, comprising:a frame (1) having a support surface (4) to support a lower surface of a sheet or a sheet bundle (S);a positioning means attached to the frame (1) to position the sheet or the sheet bundle (S) at a fold position on the support surface (4);a knife blade (5);a pair of folding rollers (6a, 6b) opposed to the knife blade (5) with the support surface (4) therebetween at the fold position, the folding rollers (6a, 6b) being attached to the frame (1), the knife blade (5) and the folding rollers (6a, 6b) being disposed in parallel to each other, an edge of the knife blade (5) being opposed to a gap between the folding rollers (6a, 6b), the support surface (4) having a opening (3) through which the knife blade (5) passes;a knife drive unit (7) for reciprocating the knife blade (5) in a direction perpendicular to the support surface (4) through the opening (3) between a first position and a second position, the first position being opposed to the folding rollers (6a, 6b) with the support surface (4) therebetween and spaced from the support surface (4), the second position being disposed adjacent the gap between the folding rollers (6a, 6b);a support arm (8) attached to the frame (1) to support the knife drive unit (7); anda control unit (22) for controlling the knife drive unit (7); whereinthe reciprocal movement of the knife blade (5) between the first and second positions effects a folding operation, whereinwhile the knife blade (5) moves from the first position to the second position, the sheet or the sheet bundle (S) on the support surface (4) being folded in two by the knife blade (5), an edge of the folded portion thereof being pushed out of the opening (3) and inserted to the gap between the folding rollers (6a, 6b) so that the sheet or the sheet bundle (S) can be folded by the folding rollers (6a, 6b); and whereinthe knife drive unit (7) comprises:a holder (9) attached to the support arm (8);a rod (10) extending in a direction perpendicular to the support surface (4) and attached to the holder (9) to reciprocate in an axial direction thereof, the rod (10) having one end attached to the knife blade (5);a block (11) attached to a center portion of the rod (10);a feed screw (12) extending in parallel to the rod (10) and attached to the holder (9) to rotate around an axis thereof, the block (11) having a thorough hole which has thread grooves corresponding to the feed screw (12), the feed screw (12) engaging with the through hole, the rod (10) being reciprocated by the rotation of the feed screw (12);characterized bya first pulley (13) attached to an upper or lower end of the feed screw (12);a servomotor (14) attached to the holder (9) and having a drive shaft (14a), the drive shaft (14a) extending in parallel to the feed screw (12);a second pulley (15) attached to the drive shaft (14a) of the servomotor (14); anda timing belt (16) extended between the first and second pulleys (13, 15), the servomotor (14) being controlled by the control unit (22).
- The knife folding machine according to claim 1, whereinthe control unit (22) comprises:a first input portion (23) for receiving input of both a data of a distance (d1) from the support surface (4) to the first position and a data of a distance (d2) from the support surface (4) to the second position; anda first memory (24) for storing the datum of the distances (d1, d2) inputted through the first input portion (23); and whereinthe control unit (22) controls the servomotor (14) based on the datum of the distances (d1, d2) stored in the first memory (24).
- The knife folding machine according to claim 2, further comprising:a feed means attached to the frame (1) to sequentially feed the sheet or the sheet bundle (S) to the fold position in a direction parallel or perpendicular to the knife blade (5) on the support surface (4); whereinthe positioning means comprises a stopper (21) disposed on a downstream side of the knife blade (5) and extending in a direction perpendicular to a feed path of the sheet or the sheet bundle (S) on the support surface (4), the stopper (21) positioning the sheet or the sheet bundle (S) at the fold position by an abutment of a front end of the sheet or the sheet bundle against the stopper (21).
- The knife folding machine according to claim 3, further comprising:a sensor (28) disposed in the middle way of the feed path of the sheet or the sheet bundle (S) to detect a passage of a tail end of the sheet or the sheet bundle (S); whereinthe stopper (21) is movable along the feed path in a direction of toward and away from the sensor (28) and disposed away from the sensor (28) by a distance (r) summed up in both of a distance (p) along the feed path of the sheet or the sheet bundle (S) and a predetermined distance (q); whereinthe control unit (22) comprises:a second input portion (25) for receiving input of a data of a delay time (t) from when the tail end of the sheet or the sheet bundle (S) passes through the sensor (28) till when the folding operation of the knife blade (5) starts; anda second memory (26) for storing the data of the delay time (t) inputted through the second input portion (25); and whereinthe control unit (22) controls the servomotor (14) of the knife drive unit (7) based on a detecting data from the sensor (28) and the data of the delay time (t) stored in the second memory (26).
- The knife folding machine according to claim 4, whereinthe feed means comprises:a drive roller (17) and an idle roller (18) attached to the frame (1) and spaced from and in parallel to each other;at least one conveyer belt (20) extending between the drive roller (17) and idle roller (18); anda second servomotor (19) attached to the frame (1) to rotate the drive roller (17); whereina part of the support surface (4) is formed by a feed surface of the conveyer belt (20), each of rotation shafts of the drive roller (17) and idle roller (18) being disposed in parallel or vertical to the knife blade (5).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2009/070695 WO2011070666A1 (en) | 2009-12-10 | 2009-12-10 | Knife folding device |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2511212A1 EP2511212A1 (en) | 2012-10-17 |
EP2511212A4 EP2511212A4 (en) | 2013-12-11 |
EP2511212B1 true EP2511212B1 (en) | 2016-03-30 |
Family
ID=44145237
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09852062.0A Active EP2511212B1 (en) | 2009-12-10 | 2009-12-10 | Knife folding device |
Country Status (6)
Country | Link |
---|---|
US (1) | US20120238422A1 (en) |
EP (1) | EP2511212B1 (en) |
JP (1) | JP5534532B2 (en) |
CN (1) | CN102639420B (en) |
DK (1) | DK2511212T3 (en) |
WO (1) | WO2011070666A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5288514B2 (en) * | 2009-08-26 | 2013-09-11 | ホリゾン・インターナショナル株式会社 | Paper folding device |
JP6717497B2 (en) * | 2016-05-27 | 2020-07-01 | ホリゾン・インターナショナル株式会社 | Knife folding device |
CN111409353B (en) * | 2020-04-21 | 2021-06-15 | 河南日报报业集团大河印刷有限公司 | Full-automatic printing production line |
JP2022184119A (en) * | 2021-05-31 | 2022-12-13 | 株式会社ディスコ | Sheet sticking apparatus |
Family Cites Families (21)
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DE3022607C2 (en) * | 1980-06-16 | 1984-01-26 | Maschinenbau Oppenweiler Binder GmbH & Co, 7155 Oppenweiler | Folding machine |
US4568319A (en) | 1985-02-27 | 1986-02-04 | Shoei Machine Manufacturing Co., Ltd. | Paper folding knife device of belt drive unit type for paper folder |
DE4315095A1 (en) * | 1993-05-06 | 1994-11-10 | Stahl Gmbh & Co Maschf | Method for operating a folding machine |
JPH10258966A (en) * | 1997-03-18 | 1998-09-29 | Hitachi Seiko Ltd | Folding device for booklet folding machine |
JPH10265124A (en) * | 1997-03-26 | 1998-10-06 | Hitachi Seiko Ltd | Folding device for pamphlet |
EP1117540B1 (en) * | 1998-09-29 | 2004-03-03 | Hewlett-Packard Company, A Delaware Corporation | Method and apparatus for making booklets |
JP2001261220A (en) * | 2000-03-17 | 2001-09-26 | Konica Corp | Sheet folding device, sheet post-treating device and image forming apparatus |
JP3433800B2 (en) * | 2000-10-04 | 2003-08-04 | 株式会社東京機械製作所 | Rotary chopper folding device |
US6673002B2 (en) * | 2001-10-05 | 2004-01-06 | Hewlett-Packard Development Company, L.P. | Sheet folding apparatus with pivot arm fold rollers |
JP3632006B2 (en) * | 2002-02-12 | 2005-03-23 | 三菱重工業株式会社 | Chopper folding device |
JP2004168533A (en) * | 2002-11-22 | 2004-06-17 | Dainippon Printing Co Ltd | Folding device and manufacturing method for stencil paper sheet |
JP2006069763A (en) * | 2004-09-03 | 2006-03-16 | Fuji Xerox Co Ltd | Sheet folding device |
JP4506590B2 (en) * | 2005-07-12 | 2010-07-21 | コニカミノルタビジネステクノロジーズ株式会社 | Paper post-processing apparatus, image forming apparatus having the same, and paper post-processing method |
DE102005046688A1 (en) * | 2005-09-29 | 2007-04-05 | Heidelberger Druckmaschinen Ag | Sword folder and method for setting a knife folder |
JP4307460B2 (en) * | 2006-03-24 | 2009-08-05 | ホリゾン・インターナショナル株式会社 | Roller device for paper folding machine |
JP4302706B2 (en) * | 2006-03-28 | 2009-07-29 | ホリゾン・インターナショナル株式会社 | Paper folding device |
JP4743776B2 (en) * | 2006-06-30 | 2011-08-10 | 京セラミタ株式会社 | Sheet folding device |
DE102006042878A1 (en) * | 2006-09-13 | 2008-03-27 | Heidelberger Druckmaschinen Ag | Device for positioning a trailing edge of sheets |
JP2008143637A (en) * | 2006-12-08 | 2008-06-26 | Komori Corp | Chopper folding device |
FR2917395B1 (en) * | 2007-06-12 | 2009-09-18 | Goss Int Montataire Sa | TABLE FOR SQUARE PEN DEVICE AND CORRESPONDING PED PLIER DEVICE. |
CN201151695Y (en) * | 2007-12-04 | 2008-11-19 | 中山市富山玻璃机械有限公司 | Full-automatic drill feed apparatus of vertical piercing machine glass |
-
2009
- 2009-12-10 JP JP2011545025A patent/JP5534532B2/en active Active
- 2009-12-10 WO PCT/JP2009/070695 patent/WO2011070666A1/en active Application Filing
- 2009-12-10 CN CN200980162660.7A patent/CN102639420B/en active Active
- 2009-12-10 EP EP09852062.0A patent/EP2511212B1/en active Active
- 2009-12-10 US US13/512,730 patent/US20120238422A1/en not_active Abandoned
- 2009-12-10 DK DK09852062.0T patent/DK2511212T3/en active
Also Published As
Publication number | Publication date |
---|---|
DK2511212T3 (en) | 2016-05-17 |
JP5534532B2 (en) | 2014-07-02 |
US20120238422A1 (en) | 2012-09-20 |
EP2511212A1 (en) | 2012-10-17 |
CN102639420A (en) | 2012-08-15 |
EP2511212A4 (en) | 2013-12-11 |
CN102639420B (en) | 2015-05-13 |
JPWO2011070666A1 (en) | 2013-04-22 |
WO2011070666A1 (en) | 2011-06-16 |
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