JP2008037640A - Paper folding machine - Google Patents

Abstract

A paper folding machine that uses a simple structure of a roller and a feed mechanism to fold a paper at a correct crease, and correctly convey and discharge the paper.
A folding portion 17 is provided between a guide portion 21 disposed along a virtual straight line 19 and a carry-in path 18. Folding and discharging rollers 22a and 22b are disposed on the sheet discharging side of the folding unit 17, the loading roller 23 is pressed against the folding and discharging roller 22b near the loading path 18, and is sent back to the folding and discharging roller 22a near the guide unit 21. A roller 24 is detachably disposed, and a push member 27 is integrally attached to the return feed roller 24 via a rotation support shaft 26. When the paper 16 is inserted into the guide portion 21 and the fold 16-1 reaches the folding portion 17, the return feed roller 24 and the pressing member 27 move to the left, and the pressing member 27 folds the paper 16 and discharge roller pair 22 The return feeding roller 24 cooperates with the carry-in roller 23 to push the paper 16 in the folding direction (direction of the folding / discharging roller pair 22) from both sides.
[Selection] Figure 1

Description

  The present invention relates to a paper folding machine, and more particularly to a paper folding machine that folds a sheet at a correct crease and correctly conveys and discharges the sheet.

Conventionally, it is well known that a paper folding machine has been used to fold printing paper to be inserted into an envelope or the like, or to fold a pressure-bonding sheet in a stage before pressure bonding.
FIGS. 4A and 4B are diagrams showing a general structure of a paper folding machine that folds such paper. First, the paper folding machine 1 shown in FIG. 4A includes a feed roller 2 that transports a sheet to be folded as indicated by an arrow a, and a feed folding roller 3 that is in pressure contact with the feed roller 2.

  Further, a feed guide (also referred to as a buckle) 4 arranged with an inclination angle in front of the feed direction of the feed roller 2 and the feed folding roller 3 and a feed roller 2 on the side of the entrance of the feed guide 4 are described below. On the opposite side, a folding feed roller 5 that is in pressure contact with the feed folding roller 3 is disposed.

  The sheet conveyed in the direction of arrow a is fed into the conveyance guide 4 by the feed roller 2 and the feed folding roller 3, and the leading edge of the sheet abuts on the innermost stopper portion 6 of the conveyance guide 4. By continuing the conveyance by the feed roller 2 and the feed folding roller 3, the sheet is bent at the sheet entrance of the conveyance guide 4.

  With the bent position as the leading end, the sheet is inserted between the feed folding roller 3 and the folding feed roller 5. As a result, the sheet is conveyed while being folded, and discharged from the discharge port 7 to the outside.

  However, since the paper folding machine 1 is provided with the paper stopper portion 6 in the transport guide (buckle) 4, a loud sound is generated when the paper collides with the stopper portion 6, and there is a problem such as failure. There is a problem that surprises the user and the surrounding people that it may have occurred.

Further, since the conveyance guide 4 is disposed at an inclination from the sheet conveyance path, there is a problem that a wasteful arrangement space is required and the entire apparatus becomes large.
Therefore, the paper folding machine 8 shown in FIG. 4 (b) is provided with folding rollers 11 and 12 at the folding position of the conveyed paper as shown by the arrow b, and corresponds to the pressure contact portion of the folding rollers 11 and 12. The pushing member 13 is arranged at a position to be operated. The paper folding machine 8 does not have the conveyance guide 4, that is, the stopper portion 6 as shown in FIG. Further, there is no feed roller 2 near the folding position.

  In this paper folding machine 8, when the fold of the paper conveyed as shown by the arrow b comes to the paper folding position of the paper folding machine 8, the push member 13 has its tip formed at an acute angle in the conveyance path. The paper is advanced and pressed against the press-contact portion of the folding rollers 11 and 12 to fold the paper, and the paper is conveyed to the discharge port 14 while being folded by the folding rollers 11 and 12.

  This paper folding machine 8 has a problem of generating sound because the paper guide is pressed by the pressing member 13 and the paper is caught in the folding rollers 11 and 12 because the conveyance guide 4 (stopper portion 6) is unnecessary. Further, since it is not necessary to provide the conveyance guide 4 with an inclination, the problem of increasing the size of the apparatus is solved.

  By the way, in such a paper folding machine, the roller of each part is made of metal, and the conveyance of the paper is performed by the frictional force. For this reason, slipping occurs in the conveyance of the paper in the paper quality of the paper to be folded, for example, glossy paper such as art paper or coated paper. Also, slippage may occur in the conveyance of the paper due to the printing ink.

  For this reason, if the pressing force by the pressing member 13 is weak, the paper and the folding rollers 11 and 12 slip and cannot perform the paper folding function. On the other hand, when the pressing force by the pressing member 13 is increased, there is a problem that wear of the folding rollers 11 and 12 and the pressing member 13 is accelerated.

Further, since there is no sheet presser like the feed roller 2 near the folding position, accurate folding position setting by the pressing member tends to be shifted.
In any case, if slippage occurs in the conveyance of the sheet, the sheet cannot be folded. For this reason, some paper folding machines limit the paper quality of the paper to be folded to plain paper, but this is inconvenient because the application is limited.

Therefore, using a roller (sandwich roller, combination roller) configured to embed and adhere a rubber band on the surface of a metal drive roller so that the rubber and the metal are alternately positioned in the axial direction of the roller, A method has been proposed that can fold paper regardless of the type. (For example, refer to Patent Document 1.)
Similarly, an example in which minute protrusions are provided on the surface of the feed roller has been proposed as a configuration for preventing slippage of the paper. (For example, see Patent Document 2.)
JP-A-57-027866 JP 2005-24752 A

  However, as in the technique of Patent Document 1, it is technically difficult to process two types of materials, that is, a flexible material called rubber and a rigid material called metal together as a roller with high accuracy, and the manufacturing cost becomes expensive. In addition, the replacement life of the roller is short. Furthermore, there is a problem that separation of rubber and metal during recycling is troublesome and inferior in recyclability.

  In view of the above-described conventional situation, an object of the present invention is to provide a paper folding machine that uses a simple configuration of a roller and a feed mechanism, folds a sheet at a correct fold, and correctly conveys and discharges the sheet.

  First, a paper folding machine according to a first aspect of the present invention includes a carry-in path for carrying paper into a folding part, a guide part arranged in a virtual extension linear direction of the carry-in path, and between the guide part and the carry-in path. A folding portion provided on the paper discharge side of the folding portion, a folding discharge roller pair disposed near the guide portion and a folding discharge roller disposed near the carry-in path, and the folding discharge A carry-in roller that is pressed against the folding discharge roller arranged near the carry-in path of the roller pair from the opposite side of the paper discharge side, and a folding discharge roller arranged near the guide portion of the folding discharge roller pair A return feed roller that is separated from the opposite side of the paper discharge side, and a separation method for a folding discharge roller that is attached to the rotation support shaft of the return feed roller and disposed near the guide portion of the return feed roller Or constituted by a pushing member in pressure contact direction to move together with the return feed roller.

  In the paper folding machine, for example, when the front end portion of the paper is carried into the guide portion, the return feed roller and the pressing member move in the separation direction, and the fold of the paper is pushed by the pressing portion of the pressing member. When the position corresponding to the front end is reached, the return feed roller and the pressing member move in the press-contact direction, the return feed roller presses against the folding discharge roller disposed near the guide portion, and the pressing member The front end of the pressing portion is configured to fold the fold of the sheet and project the folded fold to the opposing pressure contact portion of the fold discharge roller pair.

  In this case, the pressing member, for example, when the front end of the pressing portion protrudes from the opposing pressure contact portion of the fold discharge roller pair when the fold where the valley of the sheet is folded is pressed against the opposing pressure contact of the pair of folding discharge rollers. It is comprised so that the predetermined space | interval may be maintained from the part.

  Next, a paper folding machine according to a second aspect of the invention includes a carry-in path for carrying the paper into the folding part, a guide part arranged in a virtual extension linear direction of the carry-in path, the guide part, and the carry-in path. A folding portion provided therebetween, a pair of carry-in rollers composed of a position-fixed carry-in roller and a position-movable carry-in roller arranged in the middle of the carry-in path, and disposed near the guide portion on the paper discharge side of the fold portion. A pair of folding / discharging rollers including a folding / discharging roller and a folding / discharging roller disposed near the loading path, and a rotation shaft of the movable movable loading roller supported at one end, rotate around a rotation fulcrum, and rotate A carry-in folding roller and a return folding roller are supported via a support member at the other end opposite to the one end with respect to the fulcrum, and the position movable carry-in roller is separated from and brought into contact with the position-fixed carry-in roller. Paper discharge side of A rotation member that makes the carry-in folding roller and the return folding roller come in contact with and away from the pair of folding and discharging rollers from the opposite side, and the folding discharge roller of the carrying-in folding roller and the return folding roller that are formed on the support member. The supporting member, the carry-in folding roller, and the pushing member that moves together with the return folding roller in the direction of contacting and separating the pair are configured.

  In this paper folding machine, for example, when the front end portion of the paper is carried into the guide portion, the turning member is turned so as to press the position movable carry-in roller against the position-fixed carry-in roller. When the crease of the pressing member comes to the position corresponding to the pressing portion tip of the pressing member, the rotating member rotates so as to separate the position movable loading roller from the position fixing loading roller, and the pressing member tip of the pressing member Is configured such that the fold of the sheet is valley-folded and the fold-folded fold is projected to the opposing pressure contact portion of the fold discharge roller pair.

  In this case, the pressing member, for example, when the front end of the pressing portion protrudes from the opposing pressure contact portion of the fold discharge roller pair when the fold where the valley of the sheet is folded is pressed against the opposing pressure contact of the pair of folding discharge rollers. It is comprised so that the predetermined space | interval may be maintained from the part.

  Furthermore, the paper folding machine of the third invention is a carry-in path for carrying the paper into the folding portion, a pair of carry-in rollers comprising a position-fixed carry-in roller and a position-movable carry-in roller arranged in the middle of the carry-in path, A discharge path extending in one direction orthogonal to the virtual extension straight line direction of the carry-in path downstream of the carry-in path, and along the upstream and downstream sides along the virtual extension straight line of the carry-in path A pair of fold discharge rollers disposed at the carry-in entrance and forming a fold portion at the opposing pressure contact portion, and a guide that is open to the fold portion and is inclined from the virtual extension straight line of the carry-in passage to the opposite side of the discharge passage. And the rotation shaft of the position movable carry-in roller are supported at one end, rotate around a rotation fulcrum, and support the position movable folding feed roller at the other end opposite to the one end with respect to the rotation fulcrum. When the paper is carried into the guide portion, the rotating member is The position movable carry-in roller is rotated so as to come into pressure contact with the position-fixed carry-in roller, and the position of the paper is bent in the direction of the folding portion when the leading edge of the paper comes into contact with the stopper portion of the guide portion. The movable carry-in roller is configured to include a rotation member that releases the movable carry-in roller from the pressure contact with the position-fixed carry-in roller and presses the position movable folding feed roller to the upstream folding discharge roller.

  First, according to the first aspect of the present invention, since the paper is folded by the pressing member, the movable return roller integrated with the pressing member is brought into pressure contact with the guide side folding discharge roller of the pair of folding discharge rollers. And the return roller can push the paper from both sides in the direction of the folded portion of the paper, thereby eliminating the need for a paper stopper and eliminating the paper collision noise.

Further, since the sheet is forcibly folded, it is not necessary to provide an angle to the conveyance guide in order to bend the sheet, thereby realizing space saving.
In addition, since the paper is pressed and conveyed by the roller from both the feed and return, it is not necessary to press the pressing member strongly against the folding discharge roller, thereby reducing the degree of wear of the folding discharging roller and the pressing member and improving durability. To do.

  Next, according to the second invention, in addition to the effect of the first invention, simultaneous release of pressure contact release between the pair of carry-in rollers and pressure contact start of both the carry-in folding and back-fold rollers to the folding discharge roller pair is switched. Thus, paper conveyance is instantaneously switched from conveyance before paper folding by the pair of carry-in rollers to conveyance after paper folding by the pair of folding and discharging rollers, so that the gear ratio (or pulley diameter) of the rotation transmission system can be changed without changing the rotation speed of the motor. The ratio of the transfer speed before and after the folding of the paper can be instantly switched by only the ratio.

  Furthermore, according to the third aspect of the present invention, the release of the conveyance by the position movable carry-in roller and the start of the conveyance by the position movable folding roller are simultaneously switched with a very simple configuration, so that the rotation can be transmitted without changing the rotation speed of the motor. Conveniently, it is possible to instantaneously switch the conveyance speed before and after folding the paper only by the gear ratio (or pulley diameter ratio) of the system.

Embodiments of the present invention will be described below with reference to the drawings.
(Embodiment 1)
FIG. 1 is a diagram illustrating a configuration of a paper folding machine according to the first embodiment. As shown in the figure, the paper folding machine 15 of this example includes a carry-in path 18 for carrying the paper 16 into the folding portion 17 as indicated by an arrow c.

And the guide part 21 is arrange | positioned in the direction of the virtual extension straight line 19 of this carrying-in path 18. The folding portion 17 is provided between the guide portion 21 and the carry-in path 18.
The paper folding machine 15 includes a folding discharge roller 22a disposed near the guide portion 21 and a folding discharge roller 22b disposed near the carry-in path 18 on the paper discharge side (left side of the drawing) of the folding portion 17. A folding discharge roller pair 22 is provided.

  The fold discharge roller 22b disposed near the carry-in path 18 of the pair of fold discharge rollers 22 is arranged so that the carry-in roller 23 comes into pressure contact with the side opposite to the paper discharge side (right side in the drawing). .

  On the other hand, with respect to the folding discharge roller 22a disposed near the guide portion 21 of the pair of folding discharge rollers 22, a return feed roller 24 that is separated from the opposite side (right side in the drawing) of the sheet discharge side is disposed. .

  A push member 27 is attached to the rotation support shaft 26 of the return feed roller 24. The pressing member 27 is used together with the return roller 24 in a direction away from the folding discharge roller 22a disposed near the guide portion of the return roller 24 (right side in the figure) or in a pressure contact direction (left side in the figure). Moving.

  In the paper folding machine 15, when the front end portion of the paper 16 is carried into the guide portion 21, the return feed roller 24 and the pushing member 27 move in the separation direction (rightward in the drawing) as shown by the solid line in FIG. is doing.

  When the fold line 16-1 of the paper 16 comes to a position corresponding to the pressing portion tip 27-1 of the pressing member 27, the return feed roller 24 and the pressing member 27 are pressed from the position indicated by the solid line in FIG. Move to the left in the figure.

  The return roller 24 is in pressure contact with the folding discharge roller 22 a disposed near the guide portion as indicated by a two-dot chain line 24-1, and the pressing portion distal end 27-1 of the pressing member 27 is fold 16 of the paper 16. -1 is valley-folded, and the valley-folded crease 16-1 is projected to the opposing pressure contact portion of the folding discharge roller pair 22 as indicated by a broken line 27-2 (the state of the paper 16 at this time is shown in FIG. Is omitted).

  As described above, according to the present embodiment, paper is folded by the pressing member 27 and at the same time the guide side folding discharge roller 22a of the folding discharge roller pair 22 is movable and integrated with the return member 24 integrated with the pressing member 26. Therefore, the carry-in roller 23 and the return roller 24 can push the paper from both sides in the direction of the folding of the paper 16 (the direction of the pressure-contacting portion of the folding discharge roller pair 22).

  Thus, since the paper 16 is forcibly folded, the inclined conveyance guide 4 shown in FIG. 4A for bending the paper 16 is not necessary. That is, since the stopper portion 6 is eliminated, it is possible to eliminate the collision sound of the paper 6 with the stopper portion 6.

  Further, it is only necessary to provide the guide portion 21 in the direction of the virtual extension straight line 19 of the carry-in path 18, and it is not necessary to provide the transport guide 21 with an angle like the transport guide 4 as shown in FIG. Thereby, the space saving of the whole apparatus is implement | achieved.

  Further, as shown in FIG. 1, the pressing member 27 has a pressing portion tip 27-1 that shows a fold line 16-1 that is a valley fold of the paper 16 and is indicated by a broken line 27-2 at the opposing pressure contact portion of the folding discharge roller pair 22. , The pressing portion distal end 27-1 maintains a predetermined distance from the opposing pressure contact portion of the folding discharge roller pair 22.

  In this example, as described above, the carry-in roller 23 and the return-feed roller 24 can push the paper from both sides in the direction of the folding portion of the paper 16 (the direction of the opposing pressure contact portion of the folding discharge roller pair 22). 27, it is only necessary to bring the pressing portion tip 27-1 close to a position sufficient to hold the fold 16-1 formed by valley folding of the paper 16 between the opposing pressure contact portions of the folding discharge roller pair 22, and the folding discharge roller pair There is no need to press strongly against the 22 opposing pressure contact portions.

Therefore, the degree of wear of the folding discharge rollers 22a and 22b and the pressing member 27 is reduced, and the durability of these members is improved.
(Embodiment 2)
By the way, when folding paper in the device and then carrying out the folded paper to a process such as printing, the transport speed that defines the number of sheets to be processed is based on the transport speed for the printing process that requires more accuracy. It is highly possible that In general, it is preferable that the sheet folding is set so as to secure as many processed sheets as possible.

  However, since the sheet length changes before and after folding, it is desirable that the conveyance speed before folding be higher than that after folding when the conveyance speed after folding (the conveyance speed in the subsequent process) is used as a reference. In this case, it is required to switch the conveyance speed in as short a time as possible.

  Therefore, a paper folding machine feeding mechanism capable of instantaneously switching the conveyance speed before and after folding the paper 16 without changing the rotational speed of the motor will be described below as a second embodiment.

  FIG. 2 is a diagram illustrating a configuration of the paper folding machine according to the second embodiment. As shown in FIG. 2, the paper folding machine 30 of this example includes a carry-in path 32 for carrying the paper 16 into the folding unit 31 as indicated by an arrow d.

A guide portion 34 is arranged in the direction of the virtual extension straight line 33 of the carry-in path 32. The folding part 31 is provided between the guide part 34 and the carry-in path 32.
In addition, the paper folding machine 30 includes a pair of carry-in rollers 35 including a fixed-position carry-in roller 35a and a position-movable carry-in roller 35b arranged in the middle of the carry-in path 32.

  Further, the paper folding machine 30 includes a folding discharge roller 36 a disposed near the guide portion 34 and a folding discharge roller 36 b disposed near the carry-in path 32 on the paper discharge side (left side of the drawing) of the folding portion 31. A folding discharge roller pair 36 is provided.

  Further, the paper folding machine 30 includes a rotating member 38 that supports the rotating shaft 37 of the position movable carry-in roller 35b at one end. The rotation member 38 rotates about a rotation fulcrum 39, supports a support member 41 on the other end opposite to the rotation fulcrum 39, and the carry-in folding roller via the support member 41. 42 and the return folding roller 43 are supported.

  The rotating member 38 separates the position movable carry-in roller 35b from the position-fixed carry-in roller 35a (position of the two-dot chain line 35b-1) (position of the solid line 35b), and From the opposite side (right side of the figure), the carry-in folding roller 42 and the return folding roller 43 are in contact with the folding discharge roller pair 36 (positions of the two-dot chain lines 42-1 and 43-1) (solid lines 42, 43 position).

  Further, the support member 41 is formed with a pressing member 44 that protrudes so as to face the opposing pressure contact portion of the folding discharge roller pair 36. The push member 44 may be formed integrally with the support member 41, or a member formed separately from the support member 41 may be attached to the support member 41.

  The pressing member 44 moves together with the support member 41, the carry-in folding roller 42, and the return folding roller 43 in the direction in which the carry-in folding roller 42 and the return folding roller 43 contact and separate from the pair of folding and discharging rollers 36 (left-right direction in the figure). .

  In the paper folding machine 30, when the front end portion of the paper 16 is carried into the guide portion 34, the turning member 38 is rotated so as to press the position movable loading roller 35b against the position fixing loading roller 35a. That is, it rotates around the rotation fulcrum 39 in the clockwise direction in the figure.

  Thereby, the support member 41, the pushing member 44, the carry-in folding roller 42, and the return folding roller 43 supported by the other end of the rotating member 38 are separated from the pair of folding and discharging rollers 36 (right side in the drawing). Moving.

  Further, in the paper folding machine 30, when the fold line 16-1 of the paper 16 comes to a position corresponding to the tip of the pushing member 44, the rotating member 38 separates the position movable carry-in roller 35b from the position-fixed carry-in roller 35a. To turn.

  As a result, the support member 41, the push member 44, the carry-in folding roller 42, and the return folding roller 43 supported by the other end of the rotating member 38 move in a direction in contact with the folding / discharging roller pair 36 (left side in the drawing). To do.

  That is, the carry-in folding roller 42 and the return folding roller 43 are pressed against the folding discharge roller pair 36, and at the same time, the front end of the pressing member 44 folds the fold 16-1 of the paper 16 and folds the valley. The crease 16-1 is projected to the opposing pressure contact portion of the fold discharge roller pair 36 (in the figure, the state of the paper 16 at this time is not shown).

  As described above, also in the present embodiment, the carry-in folding roller 42 and the return folding roller 43 are in pressure contact with the folding / discharging roller pair 36 at the same time when the paper is folded by the pressing member 44. The folding roller 42 and the return folding roller 43 can push the paper 16 from both sides in the direction of the folding portion of the paper 16 (the direction of the opposing pressure contact portion of the folding discharge roller pair 22).

  Thus, also in this embodiment, since the paper 16 is forcibly folded, the inclined conveyance guide 4 as shown in FIG. 4A for bending the paper 16 is not necessary. That is, since the stopper portion 6 is eliminated, it is possible to eliminate the collision sound of the paper 6 with the stopper portion 6.

  Further, it is only necessary to provide the guide portion 34 in the direction of the virtual extension straight line 33 of the carry-in path 32, and it is not necessary to provide the transport guide 34 with an angle like the transport guide 4 as shown in FIG. Thereby, also in this example, the space saving of the whole apparatus is implement | achieved.

  Further, as shown in FIG. 2, the push member 44 has its tip moved as indicated by a broken line 44-1, and the fold line 16-1 of the paper 16 is turned to the opposing pressure contact portion of the folding discharge roller pair 36. When protruding, the front end of the pressing member 44-1 maintains a predetermined distance from the opposing pressure contact portion of the folding discharge roller pair 36.

  Also in this example, as described above, the carry-in folding roller 42 and the return folding roller 43 can push the paper from both sides in the direction of the folded portion of the paper 16 (in the direction of the opposing pressure contact portion of the folding discharge roller pair 36). The member 44 (44-1) does not need to strongly press the paper 16 against the opposing pressure contact portion of the folding and discharging roller pair 36.

Therefore, also in this example, the degree of wear of the folding discharge rollers 36a and 36b and the pressing member 44 is reduced, and the durability of these members is improved.
In the present embodiment, the pressure contact between the pair of carry-in rollers 35 (position-fixed carry-in roller 35a and position-movable carry-in roller 35b) is released, and the carry-in folding roller 42 and the return folding roller 43 are brought into pressure contact with the pair of folding and discharging rollers 36. Switching to start at the same time.

  Accordingly, the paper conveyance is instantaneously switched from the conveyance before the paper folding by the carry-in roller pair 35 (the conveyance faster than after the paper folding) to the conveyance after the paper folding by the folding discharge roller pair 36 (conveyance according to the subsequent process). be able to.

  Therefore, in addition to the above-described effects, in the present embodiment, the paper 16 before and after the folding of the paper 16 is only changed by the gear ratio (or pulley diameter ratio) of the rotation transmission system without changing the rotational speed of the motor. This is convenient because there is another effect that the transfer speed can be switched instantaneously.

(Embodiment 3)
The mechanism for instantaneously switching the transport speed before and after folding the paper 16 as described above can also be applied to the conventional configuration shown in FIG. This will be described below as a third embodiment of the present invention.

FIG. 3 is a diagram illustrating a configuration of the paper folding machine according to the third embodiment. In the figure, the same components as those in FIG. 4A are denoted by the same reference numerals as those in FIG.
The paper folding machine 45 of this example shown in FIG. 3 has a carry-in path 47 for carrying the paper 16 into the folding portion 46 as indicated by an arrow e, and a position-fixed carry-in roller 48a arranged in the middle of the carry-in path 47. And a pair of carry-in rollers 48 including position-movable carry-in rollers 48b.

  Further, the paper folding machine 45 includes a discharge path 51 that extends downstream from the carry-in path 47 in one direction orthogonal to the direction of the virtual extension straight line 49 of the carry-in path 47, and is disposed at the carry-in entrance of the discharge path 51. A pair of folding discharge rollers (feed folding roller 3 and folding feed roller 5) are arranged along the virtual extension straight line 49 of the carry-in passage 47 on the upstream side and the downstream side and constitute the folding part 46 at the opposing pressure contact part. ing.

  In addition, the paper folding machine 45 includes a guide portion 4 that is open to the folding portion 46 and is inclined from the virtual extension straight line 49 of the carry-in passage 47 to the opposite side to the discharge passage 51. A stopper portion 6 is formed at the innermost end portion of the guide portion 4.

  As described with reference to FIG. 4 (a), the front end of the paper 16 is brought into contact with the stopper portion 6, the waist is bent at the entrance of the guide portion 4, the fold is folded, and the paper 16 is discharged while being folded by the discharge roller pair. It is discharged from the outlet 7.

  By the way, the paper folding machine 45 is provided with a rotation member 53 that is supported by the rotation fulcrum 52 at a substantially central portion and rotates around the rotation fulcrum 52. The rotation member 53 supports the rotation shaft 54 of the position movable carry-in roller 48b at one end, and supports the position movable folding roller 56 at the other end opposite to the one end with respect to the rotation fulcrum 52. The position movable folding feed roller 56 is disposed as the feed roller 2 having a fixed position in FIG.

  In the paper folding machine 45, when the paper 16 is carried into the guide unit 4, the rotation member 53 rotates so as to press the position movable carry-in roller 48b against the position-fixed carry-in roller 48a. Therefore, the position movable folding feed roller 56 supported by the opposite end of the rotating member 53 is separated from the feed folding roller 3.

  When the leading edge of the paper 16 comes into contact with the stopper portion 6 of the guide portion 4 and the paper 16 bends in the direction of the folding portion 46, the rotating member 53 causes the position movable carry-in roller 48b to move to the position-fixed carry-in roller. The pressure contact with 48a is released (position indicated by a one-dot chain line 48b-1), and the position movable folding feed roller 56 is brought into pressure contact with the upstream folding discharge roller (position indicated by the one-dot chain line 56-1).

  As described above, also in this embodiment, the pressure contact between the pair of carry-in rollers 48 (position-fixed carry-in roller 48a and position-movable carry-in roller 48b) is released, and the pressure contact of the position movable folding feed roller 56 to the feed folding roller 3 is started. Are switched simultaneously.

Thereby, the sheet conveyance can be instantaneously switched from the conveyance before the paper folding by the carry-in roller pair 48 to the conveyance after the paper folding by the position movable folding feed roller 56.
Therefore, also in this embodiment, the conveyance speed of the paper 16 before and after folding is instantaneously switched only by the gear ratio (or pulley diameter ratio) of the rotation transmission system without changing the rotation speed of the motor. The effect that it can be obtained.

1 is a diagram illustrating a configuration of a paper folding machine in Embodiment 1. FIG. 6 is a diagram illustrating a configuration of a paper folding machine according to Embodiment 2. FIG. 10 is a diagram illustrating a configuration of a paper folding machine according to Embodiment 3. FIG. (a), (b) is a figure which shows the structure of the conventional paper folding machine, respectively.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Paper folding machine 2 Feed roller 3 Feed folding roller 4 Conveyance guide (buckle)
DESCRIPTION OF SYMBOLS 5 Folding roller 6 Stopper part 7 Ejection port 8 Paper folding machine 11, 12 Folding roller 13 Push member 14 Ejection port 15 Paper folding machine 16 Paper 16-1 Fold 17 Folding part 18 Carrying path 19 Carrying path virtual extension straight line 21 Guide part 22 Folding discharge roller pair 22a Folding discharge roller closer to the guide portion 22b Folding discharge roller closer to the carry-in path 23 Carry-in rollers 24, 24-1 Return feed roller 26 Rotating support shaft 27 Pushing members 27-1, 27-2 Pushing end tips 30 Paper folding Machine 31 Folding part 32 Carrying path 33 Carrying path virtual extension straight line 34 Guide part 35 Carrying roller pair 35a Position fixed carrying roller 35b, 35b-1 Position movable carrying roller 36 Folding discharge roller pair 36a Folding discharge roller 36b closer to guide part 36b Carrying path closer Folding discharge roller 37 Rotating shaft 38 Rotating member 39 Rotating fulcrum 41 Support Member 42, 42-1 Carry-in folding roller 43, 43-1 Return folding roller 44, 44-1 Push member 45 Paper folding machine 46 Folding part 47 Carry-in path 48 Carry-in roller pair 48a Position fixed carry-in roller 48b Position movable carry-in roller 49 Carry-in Road virtual extension straight line 51 Discharge path 52 Rotating fulcrum 53 Rotating member 54 Rotating shaft 56 Position movable folding feed roller

Claims (7)

A carry-in path for carrying the paper into the folding section;
A guide portion arranged in the direction of the virtual extension straight line of the carry-in path;
A folding portion provided between the guide portion and the carry-in path;
A fold discharge roller pair comprising a fold discharge roller disposed near the guide portion on the paper discharge side of the fold portion and a fold discharge roller disposed near the carry-in path;
A carry-in roller that is in pressure contact with the folding discharge roller disposed near the carry-in path of the pair of folding discharge rollers from the opposite side of the paper discharge side;
A return feed roller that is separated from the opposite side of the paper discharge side with respect to the folding discharge roller disposed near the guide portion of the pair of folding discharge rollers;
A pressing member attached to the rotation support shaft of the return roller and moving together with the return roller in a separation direction or a pressure contact direction with respect to a folding discharge roller disposed near the guide portion of the return roller;
A paper folding machine characterized by comprising: When the front end portion of the sheet is carried into the guide portion, the return feed roller and the pressing member move in the separation direction,
When the fold of the sheet comes to a position corresponding to the front end of the pressing portion of the pressing member, the return roller and the pressing member move in the pressing direction, and the return roller is disposed near the guide portion. The pressure member is pressed against the folding discharge roller, and the pressing portion tip of the pressing member is folded at the crease of the sheet, and the folded fold is projected to the opposing pressure contact portion of the folding discharge roller pair;
The paper folding machine according to claim 1.   The pressing member has a predetermined distance from the opposing pressure contact portion of the fold discharge roller pair when the tip of the pressing portion protrudes from the opposing pressure contact portion of the fold discharge roller pair when the fold where the valley of the sheet is folded is projected. The paper folding machine according to claim 2, wherein: A carry-in path for carrying the paper into the folding section;
A guide portion arranged in the direction of the virtual extension straight line of the carry-in path;
A folding portion provided between the guide portion and the carry-in path;
A pair of carry-in rollers composed of a position-fixed carry-in roller and a position-movable carry-in roller arranged in the middle of the carry-in path;
A fold discharge roller pair comprising a fold discharge roller disposed near the guide portion on the paper discharge side of the fold portion and a fold discharge roller disposed near the carry-in path;
The rotary shaft of the position movable carry-in roller is supported at one end, pivoted around a pivot fulcrum, and a carry-in folding roller and a return via a support member on the other end opposite to the one end with respect to the pivot fulcrum A folding roller is supported, and the position movable carry-in roller is separated from and brought into contact with the position-fixed carry-in roller, and the carry-in folding roller and the return folding roller are folded and discharged from the side opposite to the paper discharge side of the folding portion. A rotating member that contacts and separates the roller pair;
A pressing member that is formed on the support member and moves together with the support member, the carry-in folding roller, and the return folding roller in a direction of contacting and separating the carry-in folding roller and the return folding roller with respect to the folding discharge roller pair;
A paper folding machine characterized by comprising: When the front end portion of the sheet is carried into the guide portion, the turning member turns so as to press the position movable carry-in roller against the position-fixed carry-in roller,
When the crease of the sheet comes to a position corresponding to the front end of the pressing portion of the pressing member, the rotating member rotates so as to separate the position movable carrying roller from the fixed position carrying roller, and the pushing member pushes. The front end of the part is valley-folded on the sheet, and the fold-folded fold is projected to the opposing pressure contact part of the pair of folding discharge rollers.
The paper folding machine according to claim 4.   The pressing member has a predetermined distance from the opposing pressure contact portion of the fold discharge roller pair when the tip of the pressing portion protrudes from the opposing pressure contact portion of the fold discharge roller pair when the fold where the valley of the sheet is folded is projected. The paper folding machine according to claim 5, wherein: A carry-in path for carrying the paper into the folding section;
A pair of carry-in rollers composed of a position-fixed carry-in roller and a position-movable carry-in roller arranged in the middle of the carry-in path;
A discharge path extending in one direction orthogonal to the virtual extension linear direction of the carry-in path downstream of the carry-in path;
A pair of folding and discharging rollers disposed at the inlet of the discharge path along the upstream and downstream sides along the virtual extension straight line of the carry-in path, and forming a fold at the opposing pressure contact part,
A guide portion that is opened to the folding portion and is inclined from the virtual extension straight line of the carry-in path to the opposite side of the discharge path;
The rotary shaft of the position movable carry-in roller is supported at one end, rotated around a rotation fulcrum, and the position movable folding feed roller is supported at the other end opposite to the one end with respect to the rotation fulcrum, When the paper is carried into the guide portion, the rotating member is rotated so as to press the position movable carry-in roller against the position-fixed carry-in roller, and the front end of the paper is brought into contact with the stopper portion of the guide portion. When the sheet is bent in the direction of the folding portion, the position movable carry-in roller is released from the pressure contact with the position fixed carry-in roller, and the position movable folding feed roller is brought into pressure contact with the upstream folding discharge roller. Members,
A paper folding machine characterized by comprising:

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