JP5459637B2 - Nipping roller device - Google Patents

Description

  The present invention relates to a nipping roller device having a pair of nipping rollers installed in a folding unit, and more specifically, corresponding to the width dimension of the web niped by a pair of nipping rollers and fed downstream. The present invention relates to a nipping roller device that can move a web nipping position in the axial direction of a nipping roller.

  In recent years, rotary presses are required to be able to process webs of different widths in order to improve their operating efficiency and productivity. In a rotary press that processes webs with different paper widths, it is required to nip and process the side edges avoiding the printing area on the web. Every time there is a change in the paper width, the operator installs a nipping roller device. It was necessary to change the nip position of the nipping roller device provided on the downstream side of the former of the folding unit manually, and manually changed the position of the split collar that forms the nip circumferential surface on the roller. However, with such a method, it takes time to change the nip position.

  Therefore, in order to shorten the nip position change time of the nipping roller device accompanying the paper width changing operation, for example, an apparatus disclosed in Patent Document 1 below has been proposed as an apparatus that can automatically change the nip position. Yes.

  Patent Document 1 is a nipping roller device that is used in a rotary printing press and has two nipping rollers positioned in parallel, and the distance between nip positions provided in the axial direction of the roller is easy. An apparatus for driving one or more overlaid webs to be printed is disclosed. More specifically, this device is provided with two mutually reversing rollers as a device for driving one or more webs, the rotation axes being substantially parallel. Two webs, and is provided to grab the web between the rollers and move the web as a result of the rotation of the rollers, each roller being spaced apart Two cylindrical support surfaces are provided, and at least one of the rollers is movable in the axial direction, and even if this movement is made, each support surface of the two rollers faces the corresponding one of the other roller. It is possible to form an area for nipping the web with the support surface.

JP 2009-91158 A

  However, since the nipping roller device described in Patent Document 1 has a structure in which at least one of the rollers moves in the axial direction as a whole, a transmission mechanism capable of rotational drive transmission even when moved is required. The This leads to a relatively complicated transmission mechanism, or the transmission mechanism needs to be large enough to allow the axial movement of the rotating shaft and becomes large, and is therefore prone to failure. However, there was a problem that maintenance was difficult and manufacturing cost was increased.

  In addition, the fact that the entire roller moves in the axial direction means that the two cylindrical support surface portions that nip the web, that is, the large diameter portion, needlessly approach either one of the supports that support both ends of the roller. And the support interval of the rollers must be increased by adding the distance that the large diameter portion moves, and therefore the deflection of the shaft due to the force sandwiching the web between the pair of rollers increases. Problems also arise.

  Therefore, it has been required to create a new nipping roller device that can solve these problems. The present invention has been made in view of the existence of the above-described problems, and the purpose thereof is only the outer peripheral portion facing the overlapping outer peripheral portion in which the widthwise edges of the web of one roller are overlapped. By moving in the axial direction, it is possible to adjust the interval between the nip portions, and to provide an apparatus that does not need to move the entire roller even when changing the paper width.

  The nipping roller device according to the present invention is provided in a folding unit of a rotary press capable of printing on webs having different paper widths, and a fold side edge passing through a former nose portion and both ends in the width direction of the web in the web passing through the former. A nipping roller device that nips an overlapped side edge with a pair of rollers and feeds it downstream, wherein at least one of the pair of rollers has an outer circumference corresponding to the fold side edge A fold-side outer peripheral portion having an appropriate width including a portion and an overlapping outer peripheral portion having an appropriate width including an outer peripheral portion corresponding to the overlapping side edge are provided with a larger diameter than the other outer peripheral portions, and the overlapping-side outer peripheral portion Is provided so that it can rotate integrally with the other peripheral surface portion and can reciprocate in the axial direction of the one roller, and the other roller can be folded on the one roller. Provided with an outer periphery that can come into contact with the outer peripheral portion and the overlapping outer peripheral portion, and further provided with a moving mechanism that reciprocates the overlapping outer peripheral portion of the one roller in the axial direction of the one roller. Features.

  In the nipping roller device according to the present invention, a signal output means for outputting a signal corresponding to the axial movement of the outer peripheral portion of one of the rollers is provided, and the outer periphery of the overlapping side is based on an output signal of the signal output means. The moving position of the part can be controlled.

  In the nipping roller device of the present invention, the roller itself does not move in the axial direction, and only the outer peripheral portion facing the overlapping outer peripheral portion where the both edges in the width direction of the web are superimposed moves. The mechanism can be simplified and reduced in size, is less likely to fail, is easy to maintain, and can further reduce manufacturing costs. Moreover, according to this invention, it is not necessary to enlarge the support space | interval of a roller more than necessary, and the nipping roller apparatus excellent in intensity | strength can be provided.

It is a top view which shows the nipping roller apparatus which concerns on this embodiment, and is a figure which shows the principal part of a pair of nipping roller in a cross section. It is the B section detailed drawing in FIG. It is CC arrow line view in FIG. FIG. 2 is a detailed view of part A in FIG. 1. It is a front view of the folding unit provided with the nipping roller device concerning this embodiment. It is the flowchart which showed the process of the operation | movement of the nipping roller apparatus which concerns on this embodiment. It is the flowchart which showed the process of the operation | movement of the nipping roller apparatus which concerns on this embodiment. It is the flowchart which showed the process of the operation | movement of the nipping roller apparatus which concerns on this embodiment. It is the flowchart which showed the process of the operation | movement of the nipping roller apparatus which concerns on this embodiment.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described with reference to the drawings. The following embodiments do not limit the invention according to each claim, and all combinations of features described in the embodiments are not necessarily essential to the solution means of the invention. .

  FIG. 5 is a front view of a folding unit provided with the nipping roller device according to the present embodiment.

  From the upstream side, the folding unit includes a drag roller DR, a former 501, a forming roller 502, nipping roller devices 503 and 504 according to the present embodiment, a saw drum 505, a folding drum 506, a folding roller 507, and a delivery fan 508. A delivery belt 509 is also provided.

  In this folding unit, the web W is divided into two in the width direction by a slitter (not shown), sent to the former 501 by the drag roller DR, travels along the former 501, and runs parallel to the travel direction at the center in the width direction. The two nipping roller devices 503 and 504 are nipped on both side edges in the width direction, creased, and fed to the downstream side. The fed web W is guided between the saw cylinder 505 and the folding cylinder 506, cut to a predetermined length, and inserted between the folding rollers 507, and the folding rollers perpendicular to the traveling direction. Folded at 507, dropped onto the delivery belt 509 via the delivery fan 508, and discharged.

  Since the nipping roller devices 503 and 504 are substantially the same except that the shape of the brackets supporting these nipping rollers 503A, 503B and 504A, 504B is different, only the nipping roller device 503 will be described below. explain.

  1 to 5, the nipping roller device 503 includes nipping rollers 503A and 503B which are provided in parallel and close to each other with a web W which is folded in two by a former 501 and runs. The two nipping rollers 503A and 503B are supported between the frames FR and FR so as to be driven to rotate through the subframes SF and SF, respectively.

  The nipping roller 503A is provided on the former nose side, that is, on the lower tip side of the former 501 provided with an inclination so that the lower tip is located in front of the upper edge in FIG. The first nipping collar 3A1 having a nip surface A1a which is a large-diameter fold-side outer peripheral surface that nips the fold-side edge of the folded web W, and an outer periphery having a smaller diameter than the nip surface A1a of the first nipping collar 3A1. An intermediate member 3A2 having a surface and a nip surface A3a which has the same diameter as the nip surface A1a of the first nipping collar 3A1 and is a lap side outer peripheral surface that nips the lap side edge of the folded web W. A second nipping collar 3A3 is mounted on the shaft 3A4.

  Each of the first nipping collar 3A1 and the second nipping collar 3A3 has a split structure, and is fastened by a bolt with the shaft 3A4 interposed therebetween, and is fixed so as not to move to other than a predetermined position of the shaft 3A4. The intermediate member 3A2 is disposed between the first nipping collar 3A1 and the second nipping collar 3A3, and is fixed so as not to move on the shaft 3A4 by an appropriate means. The outer peripheral surface of the intermediate member 3A2 is the first nipping collar 3A1. The nip surface A1a and the nip surface A3a of the second nipping collar 3A3 are adjacent to each other with a step. Further, the nip surface A3a of the second nipping color 3A3 is formed so that the second nipping color 3B3 moves when the second nipping color 3B3 of the nipping roller 503B described later moves in the axial direction. Even at the position, the length in the axial direction is such that it can face the nip surface B3a of the second nipping collar 3B3.

  The bearing boxes 3A5 and 3A6 that rotatably support the shaft 3A4 of the nipping roller 503A are nipped, which will be described later, by compression springs 3A7 provided between the bearing boxes 3A5 and 3A6 and the subframe SF. A force is applied to the bearing boxes 3B5 and 3B6 that rotatably support the shaft 3B4 of the roller 503B. In the drawing, 3A8 and 3A8 are stoppers that define the minimum distance between the two nipping rollers 503A and 503B. The two nipping rollers 503A and 503B are both connected to a drive transmission mechanism (not shown) outside the left frame FR in FIG.

  The nipping roller 503B has a nip surface B1a that faces the nip surface A1a of the first nipping collar 3A1 of the nipping roller 503A and nips the fold side edge of the folded web W together with the nip surface A1a. The first nipping collar 3B1, the intermediate member 3B2 having an outer peripheral surface having a smaller diameter than the nip surface B1a, and the second nip having the same diameter as the nip surface B1a of the first nipping collar 3B1 A second nipping collar 3B3 having a nip surface B3a, which is an outer circumferential surface facing the nip surface A3a of the collar 3A3 and nips the overlapping side edge of the web W folded together with the nip surface A3a, is fixed removably. The moving member 3B7 is attached to the shaft 3B4. The first nipping collar 3B1 has a two-split structure, and is clamped with bolts with the shaft 3B4 interposed so that the nip surface B1a faces the nip surface A1a of the first nipping collar 3A1 of the nipping roller 503A. The shaft 3B4 is fixed so as not to move to any position other than a predetermined position. The intermediate member 3B2 is disposed adjacent to the first nipping collar 3B1, and is fixed so as not to move on the shaft 3B4 by an appropriate means, for example, a set screw. The outer peripheral surface of the intermediate member 3B2 is the first nipping collar 3B1. Are adjacent to the nip surface B1a with a step. Further, the intermediate member 3B2 is formed in a hollow shape having an open end surface on the side far from the first nipping collar 3B1.

  The moving member 3B7 includes a small-diameter portion that is inserted from the opening of the intermediate member 3B2 and can reciprocate in the hollow portion in the axial direction, and a collar in which the second nipping collar 3B3 is fixed by appropriate means, for example, a bolt The hollow portion having a fixed portion on the outer peripheral surface, and the hollow portion through which the shaft 3B4 passes is provided with a spline on the side close to the intermediate member 3B2, and the spline provided on the first nipping collar 3B1 side of the shaft 3B4 On the side far from the intermediate member 3B2, a sliding bearing (not shown) that fits with the outer peripheral surface of the shaft 3B4 is mounted. Further, one side of the arm 109 is attached to the outer peripheral surface of the small diameter extending to the bearing box 3B6 side from the collar fixing portion via the bearing while the axial movement is restricted with respect to the moving member 3B7.

  On the other hand, a moving mechanism 100 that moves the moving member 3B7 along the axis 3B4 is provided in the vicinity of the nipping roller 503B. As shown in FIGS. 1 to 4, the moving mechanism 100 is a male screw shaft provided in parallel with the arm 109 and the shaft 3 </ b> B <b> 4, and a female screw portion provided on one side of the arm 109 is screw-connected. 101, a motor 102 that rotationally drives the male screw shaft 101, a moving member origin detection means 105 that detects that the moving member 3B7 of the nipping roller 503B is located at the origin position, and detection of the amount of rotation of the male screw shaft 101 The amount of movement of the arm 109 along the male screw shaft 101 is detected, and the position of the moving member 3B7, that is, the nip surface B3a of the second nipping collar 3B3 and the nip surface B1a of the first nipping collar 3B1 And a rotation amount detecting means 107 for detecting the interval.

  One end of the male screw shaft 101 is rotatably supported by a shaft support bracket 104 via a slide bearing, and is further attached to the subframe SF via a motor support bracket 103 to which the bracket is attached via a shaft support bracket 108. The other end is rotatably supported by the shaft support bracket 108 via a slide bearing, and further supported by the subframe SF. The motor 102 is attached to the subframe SF via a motor support bracket 103, and its output shaft is connected to one end of the male screw shaft 101 via a coupling.

  The moving member origin detecting means 105 is provided with a proximity switch 106, and this proximity switch 106 indicates that the detected portion of the arm 109 that is moved by the rotation of the male screw shaft 101 has reached a predetermined position, that is, this arm. It is fixed to the shaft support bracket 104 via the bracket 105a so that it can be detected that the moving member 3B7 moving along the shaft 3B4 according to the movement of 109 has reached a predetermined origin position.

  The rotation amount detection means 107 includes a perforated disk 201 and a proximity switch 202 that are attached to the other end side of the male screw shaft 101 so as to be rotatable integrally with the male screw shaft 101. The proximity switch 202 supports the shaft via the bracket 203 so that the holed disc 201 can be detected while facing the hole of the holed disc 201 when the holed disc 201 rotates according to the rotation of the male screw shaft 101. It is supported by the bracket 108. For example, as shown in FIG. 4, the perforated disc 201 is provided with ten holes at equal positions around the center on the same circle.

  Next, the operation of the nipping roller device 503 configured as described above will be described with reference to the flowcharts of FIGS. Here, FIGS. 6 to 9 are flowcharts showing the process of the operation of the nipping roller device according to the present embodiment. FIG. 7 and FIG. 8 show two processes for one process related to continuous “initial setting”.

  First, prior to starting the rotary press, the width dimension of the web W used in the printing operation is input (step S601). Next, it is specified whether the control mode is an initial setting or a normal setting (step S601). These inputs and settings are made via input means connected to the control unit, for example, a graphic panel.

  In the initial setting mode, when the control unit of the nipping roller device 503 cannot detect the position of the moving member 3B7 of the nipping roller 503B, that is, the two nipping rollers 503A and 503B of the nipping roller device 503 are mutually connected. This is performed when the controller of the nipping roller device 503 cannot detect the axial nip position interval between the opposing nip surfaces.

  When the input of the width dimension of the web W and the setting of the control mode are completed, a start signal is input to start control (step S602).

  The control unit that has started control first confirms the designated control mode (step S603), and implements the designated control mode.

  The operation when the designated control mode is confirmed as the initial setting mode by the control unit is as shown in the flowcharts of FIGS. The operation when the designated control mode is confirmed as the normal setting mode by the control unit is as shown in the flowchart of FIG.

  First, the operation when the control mode is confirmed to be the initial setting mode in step S603 will be described with reference to FIGS.

  In the initial setting mode, first, an operation of positioning the moving member 3B7 of the nipping roller 503B at the origin position is started. Specifically, the control unit confirms that the moving member origin detection means 105 has not detected the detected portion of the arm 109, that is, the proximity switch 106 is not "ON" (step S701). In this confirmation, when the moving member origin detection means 105 detects the detected portion of the arm 109 and the proximity switch 106 is “ON”, the motor 102 is operated and the male screw shaft 101 is rotated. The arm 109 is moved along the male screw shaft 101, and the moving member 3B7 that moves along the shaft 3B4 according to the movement of the arm 109 is moved in a direction approaching the first nipping collar 3B1 (step S702). . Then, the proximity switch 106 is turned “OFF”, and the motor 102 is stopped after a preset time has elapsed (step S703). Next, after a predetermined time has passed after the stop, the motor 102 is operated in the opposite direction so that the male screw shaft 101 is reversed, and the arm 109 is moved in the reverse direction along the male screw shaft 101. The moving member 3B7 that moves along the axis 3B4 according to the movement of the arm 109 is moved in a direction away from the first nipping collar 3B1 (step S704).

  On the other hand, when the moving member origin detecting means 105 does not detect the detected portion of the arm 109 and the proximity switch 106 is “OFF” in step S701, the motor 102 is operated and the male screw shaft 101 is operated. Is rotated, the arm 109 is moved along the male screw shaft 101, and the moving member 3B7 that moves along the shaft 3B4 according to the movement of the arm 109 is moved in a direction away from the first nipping collar 3B1 ( Step S704).

  The moving member 3B7 that moves in step S704 stops when the moving member origin detection means 105 detects the detected portion of the arm 109 by the movement, that is, when the proximity switch 106 is turned on. That is, the control unit that has received the “ON” signal of the proximity switch 106 outputs a stop signal to stop the motor 102 and stop the rotation of the male screw shaft 101. Due to the stop of the male screw shaft 101, the movement of the arm 109 screwed to the arm 109 along the male screw shaft 101 stops, and the moving member 3B7 stops at the origin position (step S705). When the moving member origin detection unit 105 does not detect the detected portion of the arm 109 even after a predetermined time has elapsed after the start of step S704, that is, when the proximity switch 106 does not "turn on", the control unit Then, it is determined that a control abnormality has occurred, and predetermined measures such as stopping the motor 102, outputting an alarm, or displaying a predetermined graphic panel are performed (step S706).

  In the illustrated embodiment, when the moving member 3B7 of the nipping roller 503B is at the origin position, the nip position in the axial direction by the nip surfaces facing each other of the two nipping rollers 503A and 503B of the nipping roller device 503 is used. The interval is set to match the maximum width of the web W processed by the folding unit in which the nipping roller device 503 is provided.

  After completing step S705, the control unit sets an arbitrary count value N in a rotation amount counter that counts a signal output from the rotation amount detection unit 107 described later (step S707). The arbitrary count value N is the maximum moving amount of the moving member 3B7 determined based on the maximum value and the minimum value of the web W processed by the folding unit provided with the nipping roller device 503, and the male screw shaft 101. When the lead is Y and the number of signals output from the rotation amount detection means 107 when the male screw shaft 101 makes one rotation is Z, a numerical value of N ≧ (X / Y) × Z is assigned.

  When an arbitrary count value is set in the rotation amount counter, the control unit starts control to move the moving member 3B7 to a position that matches the width dimension of the web W input in step S601. That is, the motor 102 is operated to rotate the male screw shaft 101, the arm 109 is moved along the male screw shaft 101, and the moving member 3B7 that moves along the shaft 3B4 in accordance with the movement of the arm 109 has the origin position. To move toward the first nipping collar 3B1 (step S708). The position (hereinafter referred to as a normal position) that matches the input width dimension of the web W is a second nipping in which the nip surface B3a of the second nipping collar 3B3 attached to the moving member 3B7 faces this. This is a predetermined position to nip the overlap side edge when the web W having the input width dimension is folded in half between the nip surface A3a of the collar 3A3.

  When the moving member 3B7 is moved to the normal position, the rotation amount detecting means 107 detects the rotation amount of the male screw shaft 101. More specifically, the proximity switch 202 of the rotation amount detection means 107 detects the hole of the holed disc 201 that rotates integrally with the male screw shaft 101 and outputs a signal, and the rotation amount counter is set for each output signal. The specified arbitrary count value is changed. At this time, subtraction by the first output signal of the proximity switch 202 is not performed so that the first signal output time of the proximity switch 202 is regarded as the rotation start point (steps S801 and S802). When the moving member 3B7 moves in a direction approaching the first nipping collar 3B1 by the rotation of the male screw shaft 101, the rotation amount detection means 107 uses the rotation amount counter for each fall of the output signal of the proximity switch 202. When the moving member 3B7 moves away from the first nipping collar 3B1 due to the rotation of the male screw shaft 101, "1" is subtracted from the set arbitrary count value and held as the current position count value. Each time the output signal rises, “1” is added to the count value held in the rotation amount counter and held as the current position count value.

  During the movement of the moving member 3B7 to the normal position, the control unit calculates the current position of the moving member 3B7 from the current position count value of the rotation amount counter, and stops the moving member 3B7 at the normal position (step S803, step S803). S804, step S805, step S806, step S808). Further, during the movement of the moving member 3B7 to the normal position, the control unit displays a difference in distance between the normal position and the current position, for example, on a graphic display, and stops the moving member 3B7 at the normal position, that is, This display is set to “0” at the end of control or at the time of control abnormality described later (step S809). The normal position is calculated from the width dimension of the web W input by the control unit in step S601.

  When the moving member 3B7 does not reach the normal position even after a predetermined time has elapsed after the start of step S708, that is, when the current position does not match the normal position, the control unit determines that a control abnormality has occurred. Judgment is performed, and predetermined measures such as stopping the motor 102, outputting an alarm, or displaying a predetermined value on the graphic panel are performed (steps S807 and S809).

  Next, the operation when the control mode is confirmed to be the normal setting mode in step S603 will be described with reference to FIG. The “normal position” regarding the moving member 3B7 in the description of the normal setting mode is the same as the “normal position” regarding the moving member 3B7 in the description of the initial setting mode.

  As described above, the normal setting mode is performed when the control unit of the nipping roller device 503 can detect the position of the moving member 3B7 of the nipping roller 503B, that is, from the current position count value of the rotation amount counter. When the position of the member 3B7 is detected, and the controller of the nipping roller device 503 can detect the axial nip position interval between the two nipping rollers 503A and 503B of the nipping roller device 503 facing each other. To implement. Therefore, in the normal setting mode, the positional relationship between the current position of the moving member 3B7 and the normal position is immediately confirmed.

  Specifically, first, it is confirmed whether or not the current position of the moving member 3B7 is positioned closer to the first nipping collar 3B1 than the normal position (step S901), and the current position of the moving member 3B7 is the first nippi from the normal position. When it is located on the ring collar 3B1 side, the male screw shaft 101 is rotated by the motor 102, and the moving member 3B7 approaches the origin position via the arm 109 screwed to the male screw shaft 101, that is, And moved away from the first nipping collar 3B1 (step S902). During the movement of the moving member 3B7, the rotation amount detection means 107 adds “1” to the current position count value of the rotation amount counter every time the output signal of the proximity switch 202 rises. The control unit calculates the current position of the moving member 3B7 from the current position count value of the rotation amount counter, checks whether the current position is a normal position, and stops the motor 102 when the current position matches the normal position. Then, the moving member 3B7 is stopped at the normal position (step S903, step S908, step S910).

  When it is confirmed in step S901 that the current position of the moving member 3B7 is not located on the first nipping collar 3B1 side from the normal position, the current position of the moving member 3B7 is subsequently located on the origin position side from the normal position. (Step S904), and when the current position of the moving member 3B7 is located closer to the origin position than the normal position, the male screw 101 is rotated by the motor 102 in the opposite direction to that in Step S902. The moving member 3B7 is moved in a direction approaching the first nipping collar 3B1 via the arm 109 screw-connected to the male screw shaft 101 (step S905). During the movement of the moving member 3B7, the rotation amount detection means 107 subtracts “1” from the current position count value of the rotation amount counter every time the output signal of the proximity switch 202 falls. During the movement of the moving member 3B7, the control unit calculates the current position of the moving member 3B7 from the current position count value of the rotation amount counter, checks whether the current position is the normal position, and the current position is the normal position. When the value matches, the motor 102 is stopped and the moving member 3B7 is stopped at the normal position (step S906, step S908, step S910).

  When it is confirmed in step S904 that the current position of the moving member 3B7 is not located closer to the origin position than the normal position, the current position is determined to be the normal position, and the motor 102 maintains the stopped state (steps S907 and S908). Step S910).

  Further, during the movement of the moving member 3B7 to the normal position, the control unit displays a difference in distance between the normal position and the current position, for example, on a graphic display, and stops the moving member 3B7 at the normal position, that is, This display is set to “0” at the end of control or at the time of control abnormality described later (step S911).

  When the moving member 3B7 does not reach the normal position even after a predetermined time has elapsed after the start of step S902 or step S905, that is, when the current position does not match the normal position, the control unit It is determined that an abnormality has occurred, and predetermined measures such as stopping the motor 102, outputting an alarm, or displaying a predetermined value on the graphic panel are performed (steps S909 and S911).

  As mentioned above, although preferred embodiment of this invention was described, the technical scope of this invention is not limited to the range as described in the said embodiment. Various modifications or improvements can be added to the embodiment. It is apparent from the description of the scope of claims that embodiments with such changes or improvements can be included in the technical scope of the present invention.

  INDUSTRIAL APPLICABILITY The present invention can be used for a nipping roller device of an offset rotary printing press and an offset rotary printing press provided with the nipping roller device.

  100 moving mechanism, 101 male screw shaft, 102 motor, 103 motor support bracket, 104 shaft support bracket, 105 moving member origin detection means, 105a bracket, 106 proximity switch, 107 rotation amount detection means, 108 shaft support bracket, 109 arm, A1a, A3a, B1a, B3a Nip surface, 3A1 first nipping collar, 3A2 intermediate member, 3A3 second nipping collar, 3A4 shaft, 3A5, 3A6 bearing box, 3A7 compression spring, 3A8 stopper, 3B1 first nipping collar 3B2 intermediate member, 3B3 second nipping collar, 3B4 shaft, 3B5, 3B6 bearing box, 3B7 moving member, SF subframe, 201 perforated disc, 202 proximity switch, 203 bracket, 5 01 former, 502 forming roller, 503,504 nipping roller device, 503A, 503B, 504A, 504B nipping roller, 505 saw drum, 506 folding drum, 507 folding roller, 508 delivery fan, 509 delivery belt, W web DR drag roller.

Claims (2)

A folding unit of a rotary press capable of printing on webs having different paper widths. In a nipping roller device that nips between a pair of rollers and feeds them downstream,
The pair of rollers is
At least one roller has a first nipping color having a nip surface corresponding to the fold side edge, a second nipping color having a nip surface corresponding to the overlap side edge, the first nipping color, and the A hollow intermediate member provided between the second nipping collar and having an outer peripheral surface having a smaller diameter than each nip surface of the first nipping collar and the second nipping collar; Two nipping collars are attached, and a moving member configured to be capable of reciprocating in the axial direction of the one roller in the hollow portion of the intermediate member ,
The other roller is provided with an outer periphery that can contact the nip surface of the first nipping color and the nip surface of the second nipping color of the one roller;
A nipping roller provided with a moving mechanism for changing an interval between the first nipping collar and the second nipping collar by reciprocating the moving member in the axial direction of one roller. apparatus. The nipping roller device according to claim 1,
The moving mechanism is
A male screw shaft provided parallel to the axis of the one roller;
An arm attached to the moving member and screwed to the male screw shaft;
A motor that rotationally drives the male screw shaft;
Moving member origin detecting means for detecting that the moving member is located at the origin position;
A rotation amount detecting means for detecting the rotation amount of the male screw shaft;
A nipping roller device characterized by that.

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