JP3692358B2 - Sheet direction conveying direction correcting device and guide roller used therefor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sheet-like conveyance direction correcting device for correcting the conveyance direction of a sheet-like body such as a continuous package or a sheet formed by continuously forming sachets, and a guide roller used therefor.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as this type of sheet-like body conveyance direction correcting device, there is one having the following configuration. FIG. 9 is a schematic plan view of an offset pivot type sheet-like conveyance direction correcting device, and FIG. 10 is an end pivot type sheet-like conveyance direction correcting device.
[0003]
<Offset pivot type>
This tilts the frame 3 in which the two guide rolls 1 and 2 are installed in parallel with each other, and the frame 3 tilts substantially horizontally. 3 is provided with a pivot 4 serving as a tilt center.
A drive unit (not shown) for tilting the frame 3 is connected to the frame 3 so that the frame 3 and thus the guide rolls 1 and 2 are tilted to the required angle β, thereby allowing the seat to The conveyance direction of the body 5 is corrected.
[0004]
The sheet-like body 5 is wound around the two guide rolls 1 and 2 in a laterally U-shape, and the sheet-like body 5 is twisted according to the tilting of the frame 3. The conveyance direction is corrected.
[0005]
In addition to the above configuration, a linear motion type actuator (not shown) is disposed at a position offset from the pivot 4, and the frame 3 is linearly moved by this actuator, so that the guide rolls 1 and 2 can be moved as required. Some are tilted to an angle.
[0006]
<End pivot type>
This tilts a frame 8 incorporating two guide rolls 6 and 7 in parallel, and the frame 8 is a virtual turning point 9 disposed on the upstream side in the conveying direction of the sheet-like body 5. It can be tilted around the center.
[0007]
The sheet-like body 5 is wound around the two guide rolls 6, 7 in a lateral S-shape or the like, and the sheet-like body 5 is twisted according to the tilting of the frame 8. The conveyance direction is corrected.
[0008]
[Problems to be solved by the invention]
However, in the above-described conventional configuration, in addition to the two guide rolls, a frame to which these guide rolls are attached is necessary, and a drive mechanism for tilting the frame is arranged outside the frame. Must.
[0009]
For this reason, when incorporating the above-described conventional transport direction correcting device into an existing line, it is necessary to ensure a large space for that purpose, and in addition to preparing a bracket dedicated for mounting, for example, a laterally U-shaped A large remodeling such as a line configuration that can be used for S-shaped and S-shaped is required.
[0010]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a compact sheet-like conveyance direction correcting device and a guide roller used therefor, which can easily perform an attaching operation and an assembling operation to an external device.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has the following configuration.
The apparatus for correcting a conveyance direction of a sheet-like body according to claim 1 conveys the sheet-like body by tilting a guide roller that stretches the sheet-like body based on the detected conveyance direction of the sheet-like body. In the sheet direction conveyance device for correcting a direction, the guide roller is tilted within a required angle range with respect to a support shaft through which the guide cylinder that conveys and guides the sheet shape passes through the guide cylinder. capable is supported in its guide tube body, the driving mechanism including a driving source for tilting the guide cylindrical body in predetermined angular range with respect to the support shaft is built, the guide tube A pivot serving as a tilt center of the body is disposed on the support shaft in a state of being offset from the axis of the support shaft .
[0012]
According to a second aspect of the present invention, the guide roller is supported such that the guide roller is tiltable on a surface substantially parallel to the sheet-like body on the upstream side in the conveying direction reaching the guide roller.
[0013]
According to a third aspect of the present invention, there is provided an apparatus for correcting a conveyance direction of a sheet-like body, based on a meandering amount detection sensor for detecting a meandering amount of the sheet-like material to be conveyed and a meandering amount signal output from the meandering amount detection sensor. And a drive control unit that drives the drive mechanism so that the amount of meandering decreases.
[0014]
According to a fourth aspect of the present invention, there is provided a sheet direction conveyance device for correcting a conveyance direction, wherein a detection sensor that detects that the guide cylinder and the support shaft have reached a predetermined limit angle is provided. When it is detected that the support shaft has reached a predetermined limit angle, the drive control unit stops the tilting of the guide cylinder.
[0015]
The sheet-like conveyance direction correcting device according to claim 5 is provided with a detection sensor for detecting an angular deviation of the guide cylinder relative to the support shaft, and the drive control unit is prevented from detecting the angular deviation by the detection sensor. In this way, the guide cylinder is tilted.
[0016]
The guide roller used in the sheet-like conveyance direction correcting device according to claim 6, wherein the guide roller is tilted with respect to the stretched sheet-like conveyance direction to correct the sheet-like conveyance direction. in the guide roller to be used in, the guide roller is tiltably supported in a predetermined angular range with respect to the support shaft guide cylinder for conveying guiding the sheet-like body through its guide tube body portion, the A drive mechanism including a drive source for tilting the guide cylinder within a required angle range with respect to the support shaft is built in the guide cylinder, and a pivot serving as a tilt center of the guide cylinder is provided. The support shaft is disposed at a center portion of the support shaft in an offset state from the axis of the support shaft, and both ends of the support shaft are supported outside the guide cylinder .
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic side view showing a state in which the sheet conveying member according to an embodiment of the present invention is incorporated in an existing packaging machine.
[0018]
The sheet-like conveyance direction correction device A of the present invention according to one embodiment includes a guide roller B, a meandering amount detection sensor 10 and a drive control unit 11, and among them, the guide roller B is A sheet-like body (hereinafter referred to as “web”) W stretched between a plurality of other guide rollers appropriately disposed on a part of a so-called horizontal pillow type packaging machine 12 is stretched. It is attached in the state.
[0019]
The detailed configuration of the guide roller B according to one embodiment is as follows. 2 is a front view of the guide roller B, FIG. 3 (A) is a left side view thereof, (B) is a right side view thereof, and FIG. 4 is a line II shown in FIG. 3 (A). 5 is a cross-sectional view taken along the line II-II shown in FIG. 3B, FIG. 6 is a side view showing the tilted state of the guide roller B in the left side view, and FIG. FIG. 8 is a sectional view taken along line IV-IV shown in FIG. 5. 4, 6 and 8, (a) and (b) show the tilted state of the guide cylinder.
[0020]
In FIGS. 4 and 5, what is indicated by 13 is a support shaft in which small diameter portions 13b and 13c having different outer diameters are formed at both ends of a large diameter portion 13a having a large diameter in a required length range. These are supported by a pair of bearings 14 and 15 attached to the frame (not shown) of the packaging machine 12 described above.
[0021]
A support block 17 that fixes the pivot 16 away from the support shaft 13 by a predetermined distance and supports the pivot 16 in a vertical posture is fixed to the central side portion of the large-diameter portion 13a of the support shaft 13. Yes. In other words, the pivot 16 is disposed at the central portion of the support shaft 13 in a state offset from the axis O1 of the support shaft 13.
The “required distance” is such that a tilt angle of the guide cylinder 24 to be described later can be set to about 1.5 to 4 degrees while considering interference with the support shaft 13 and the like.
[0022]
Also, a motor disposition recess 13d is formed on the upper half side on one end side of the large diameter portion 13a, and a motor M1 such as a direct current motor or a servo motor as a drive source is mounted and fixed thereon, Further, a detected portion 13e for detection by a pair of limit switches S1 and S2 described later is formed on the other end portion side of the large diameter portion 13a.
[0023]
The detected portion 13e shown in the present embodiment is a portion in which a part of the outer peripheral surface of the large diameter portion 13a is recessed to a required depth, and a detection plane 13e ′ having a constant width is formed at the bottom thereof. .
[0024]
The motor M1 is fixed in a posture in which the drive shaft Ma to which the pinion gear 18 is fixed coincides with the axis O1 of the support shaft 13 in a plan view and is directed outward from one end of the support shaft 13. .
[0025]
Reference numerals 19 and 20 denote flanges having the same outer diameter, and among these flanges 19, the flange 19 has a vertical width that slidably holds a bearing 21 fitted in the small diameter portion 13 b of the support shaft 13, and A horizontally long shaft insertion long hole 19a that allows the movement of the narrow diameter portion 13b in a required range in the horizontal direction is formed.
[0026]
On the upper side of the inner surface 19b of the flange 19, a rack 22 that meshes with the pinion gear 18 is fixed horizontally.
[0027]
Further, the flange 20 has a width that allows the bearing 23 fitted and inserted into the small-diameter portion 13c of the support shaft 13 to be slidable, and moves the thin-diameter portion 13c within a required range in the horizontal direction. An allowable laterally long shaft insertion long hole 20a is formed.
[0028]
On the outer surface 20b of the flange 20, limit switches S3 and S4 are disposed above the flange 20 and a shallow cylindrical cover 28 covering the limit switches S3 and S4 is fixed.
[0029]
The limit switches S3 and S4 are detection sensors that detect the presence / absence of an angle shift of the guide cylinder 24 with respect to the support shaft 13. In other words, the limit switches S3 and S4 are detection sensors that detect whether or not the guide cylinder 24 is moved to the initial position with respect to the support shaft 13.
The “initial position” is a position where the axis O2 of the guide cylinder 24 coincides with the axis O1 of the support shaft 13 in plan view, in other words, there is no angular deviation.
[0030]
In the small diameter portion 13c, a large diameter portion 29b is integrally formed at the outer end of the small diameter portion 29a, and one side of the large diameter portion 29b is chamfered to form a substantially flat cylinder for detection 29c in a plan view. A shaped sensor dog 29 is fitted.
[0031]
The positional relationship between the sensor dog 29 and the limit switches S3 and S4 is that the detection levers S3a and S4a of the limit switches S3 and S4 simultaneously contact the side edge of the detection plane 29c at the initial position, and there is an angular deviation. In such a case, one of the detection levers S3a and S4a is not in contact. In this case, the direction of angular deviation can be determined by the fact that one of the detection levers S3a and S4a is not in contact.
[0032]
Between the flanges 19 and 20, an elongate erection member 25 having a required width with both ends fixed to the inner surfaces 19b and 20c is close to the lower side of the support shaft 13 and is connected to the axis O1 of the support shaft 13. It is installed in parallel.
[0033]
Further, both end portions of the guide cylinder 24 are attached to the outer peripheral edge portions of the flanges 19 and 20 through bearings 26 and 26. That is, the guide cylinder 24 is supported so as to rotate together with the webs W with respect to the flanges 19 and 20, for example.
The guide cylinder 24 is not limited to rotating with the web W, and may be fixed to the support shaft 13. In other words, in addition to rolling contact, includes sliding contact.
[0034]
The lower end portion of the pivot 16 disposed on the support shaft 13 side is pivotally supported on the erection member 25, so that the flanges 19, 20 and thus the guide cylinder 24 can be pivoted according to the driving of the motor M 1. It tilts integrally within a required angle α that is substantially horizontal with 16 as the center. “Tilt” means tilting.
[0035]
That is, the guide roller B is supported so as to be tiltable on a surface substantially parallel to the web W on the upstream side in the transport direction reaching the guide roller B. In the present embodiment, as shown in FIG. 1, the web W on the upstream side in the transport direction is transported horizontally, so that it is tiltably supported on a horizontal plane substantially parallel to the web W on the upstream side in the transport direction.
[0036]
A frame-shaped stay 27 is formed on the installation member 25 so as to surround the large-diameter portion 13a at a position corresponding to the detection plane 13e ′ of the large-diameter portion 13a.
The frame-shaped stay 27 is formed in a side view square shape in which a horizontal frame member 27b is installed on the upper end portions of the standing frame members 27a and 27a, and the detection levers S1a and S2a of the limit switches S1 and S2 are formed on the upper frame member 27b. The limit switches S1 and S2 are disposed and fixed so that they are spaced apart from each other by an equal distance from both side edges of the detection plane 13e '.
[0037]
In the present embodiment, the limit switches S1 and S2 are detection sensors that detect that the guide cylinder 24 and the support shaft 13 have reached a predetermined limit angle.
In other words, the limit switches S1 and S2 are for limiting the tilt angle of the guide cylinder 24 from becoming abnormally large.
The “limit angle” assumes a required angle range of several degrees around the initial position described above. Specifically, when the guide cylinder 24 is largely tilted, The angle is such that no mechanical failure or the like occurs due to the impact of the built-in components, and can be set as appropriate in consideration of the tilt angle.
[0038]
In the present embodiment, the drive mechanism C is configured by the motor M1, the pinion gear 18, the rack 22, the pivot 16, the erection member 25, and the flanges 19 and 20.
[0039]
By the way, the meandering amount detection sensor 10 (shown in FIG. 1) has a function of measuring the meandering amount of the web W such as an ultrasonic sensor in addition to the one using an LED or a CCD. It arrange | positions in the packaging machine 12 so that the one side edge part of W may be detected.
[0040]
The above “meandering amount” refers to a distance shift from the initial position in both directions (width direction) perpendicular to the conveyance direction of the web W, and the conveyance direction of the web W is the axis O1 of the support shaft 13. Including the case where the angle is
When a mark for detecting the meandering amount of the web W is printed on the web W by printing or the like, the meandering amount detection sensor 10 is disposed at a position where the meandering amount of the mark can be detected.
[0041]
The drive control unit 11 has the following functions.
(1) A function of performing feedback control on the motor M1 so as to reduce the meandering amount based on the web W detection signal output from the meandering amount detection sensor 10 described above.
[0042]
(2) A function of tilting the guide cylinder 24 so that the angle deviation is not detected by the limit switches S3 and S4 which are detection sensors for detecting the angle deviation of the guide cylinder 24 with respect to the support shaft 13.
In other words, the motor M1 is driven and controlled so that the detection plane 29c of the sensor dog 29 is simultaneously detected by the limit switches S3 and S4.
[0043]
(3) The guide cylinder 24 and the support shaft 13 are brought to a predetermined limit angle by limit switches S1 and S2 which are detection sensors that detect that the guide cylinder 24 and the support shaft 13 have reached a predetermined limit angle. A function of stopping the tilting of the guide cylinder 24 when it is detected that
In other words, the motor M1 is stopped by detecting the detection plane 13e 'by either of the limit switches S1 and S2.
[0044]
The operation of the sheet-like conveyance direction correcting device and the guide roller B according to the above-described embodiment is as follows.
First, the guide cylinder 24 and the support shaft 13 are set to the initial positions by controlling the motor M1 so as to simultaneously detect the detection plane 29c of the sensor dog 29 by the limit switches S3 and S4. At this time, the axis O2 of the guide cylinder 24 and the axis O1 of the support shaft 13 coincide with each other.
[0045]
When the web W portion on the upstream side in the conveyance direction up to the guide roller B during the conveyance of the web W is meandering, the meandering detection sensor 10 detects the meandering.
When the meandering amount signal output from the meandering amount detection sensor 10 is input to the drive control unit 11, a driving signal that reduces the detected meandering amount is generated and output to the driving mechanism C.
In accordance with this meandering amount signal, the guide cylinder 24 is tilted by a predetermined angle, for example, as shown in FIGS. Thereby, the meandering of the web W is corrected.
[0046]
When the meandering amount of the web W becomes abnormally large, the detection plane 13e 'is detected by one of the limit switches S1 and S2, which are detection sensors, and the motor M1 is thereby stopped. Thereby, the abnormal tilting of the guide cylinder 24 is stopped, and the occurrence of a mechanical failure or the like due to the tilting beyond a predetermined limit angle can be prevented.
[0047]
Note that the present invention is not limited to the above-described embodiment, and the following modifications can be made.
In the above description, a configuration in which a detection sensor that detects that the guide cylinder and the support shaft have reached a predetermined limit angle and a detection sensor that detects an angular deviation of the guide cylinder relative to the support shaft is provided. However, the detection sensor is not necessarily required, and both or one of them can be omitted.
[0048]
Further, the guide roller has been described as being tilted on a substantially horizontal surface. However, the guide roller may be supported so as to be tiltable on a surface substantially parallel to the sheet-like body on the upstream side in the conveying direction reaching the guide roller.
That is, for example, if the sheet-like body on the upstream side in the conveying direction reaching the guide roller is vertical, the guide roller may be tilted on a substantially vertical surface.
[0049]
【The invention's effect】
According to the first to sixth aspects of the invention, since the guide roller incorporating the drive mechanism including the drive source is tilted, the conveyance direction of the sheet-like material stretched on the guide roller is corrected. In addition, it is possible to easily perform mounting work and assembling work to an external device and to have a compact configuration.
Further, since a frame for supporting the guide roller, a driving source, etc. need not be provided separately from the guide roller as in the prior art, it is not necessary to make major modifications to the external device.
[0050]
In addition to the above common effects obtained by the inventions according to claims 1 to 6, the following effects can be obtained according to the inventions described in the claims.
According to the invention described in claim 2, since the guide roller is supported so as to be tiltable on a surface substantially parallel to the sheet-like body on the upstream side in the conveying direction reaching the guide roller, the correction of the conveying direction of the sheet-like member is performed. Can be performed efficiently.
[0051]
According to the invention described in claim 3, based on the meandering amount signal output from the meandering amount detection sensor for detecting the meandering amount of the conveyed sheet-like body, the drive mechanism is driven so that the meandering amount decreases. Therefore, the meandering of the sheet-like body can be easily corrected with a simple configuration.
[0052]
According to the fourth aspect of the present invention, the detection sensor that detects that the guide cylinder and the support shaft have reached a predetermined limit angle is provided, and the guide cylinder and the support shaft are predetermined by the detection sensor. When the drive control unit detects that the limit angle of the guide cylinder has been reached, the drive control unit stops tilting of the guide cylinder, so that the guide cylinder can be prevented from tilting beyond a predetermined limit angle. It is possible to prevent the occurrence of a general failure.
[0053]
According to the invention of claim 5, since the guide cylinder is tilted so that the angular deviation of the guide cylinder relative to the support shaft is not detected, the guide cylinder can be at an accurate angle, Correcting the conveyance direction of the sheet-like body can be performed accurately.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic side view showing a state in which an apparatus for correcting a conveyance direction of a sheet-like body according to an embodiment of the present invention is incorporated in an existing packaging machine.
FIG. 2 is a front view of the guide roller of the present invention according to an embodiment.
3A is a left side view of the same guide roller, and FIG. 3B is a right side view thereof.
4 is a cross-sectional view taken along the line II shown in FIG.
FIG. 5 is a cross-sectional view taken along the line II-II shown in FIG.
FIG. 6 is a side view showing a tilted state of the guide roller in a left side view.
7 is a sectional view taken along the line III-III shown in FIG.
8 is a cross-sectional arrow view taken along line IV-IV shown in FIG.
FIG. 9 is a schematic plan view of an offset pivot type device of a conventional sheet-like conveyance direction correcting device.
FIG. 10 is a schematic plan view of an end pivot type device of a conventional sheet-like conveyance direction correcting device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Meander amount detection sensor 11 Drive control part 13 Support shaft 24 Guide cylinder B Guide roller C Drive mechanism M1 Motors S1 and S2 which are drive sources Limit switches S3 and S4 which are detection sensors Limit switch W which is a detection sensor The web

Claims (6)

In the sheet conveyance direction correcting device for correcting the conveyance direction of the sheet material by tilting a guide roller that stretches the sheet material based on the detected conveyance direction of the sheet material,
The guide roller is tiltably supported in a predetermined angular range with respect to the support shaft guide cylinder for conveying guiding the sheet-like body through its guide tube body portion,
The guide cylinder has a built-in drive mechanism including a drive source for tilting the guide cylinder within a required angle range with respect to the support shaft, and a pivot serving as a tilt center of the guide cylinder Is disposed on the support shaft in a state of being offset from the axis of the support shaft .   2. The sheet-like conveyance direction correcting device according to claim 1, wherein the guide roller is supported so as to be tiltable on a surface substantially parallel to the sheet-like body on the upstream side in the conveyance direction reaching the guide roller.   A meandering amount detection sensor for detecting the meandering amount of the conveyed sheet-like body, and a drive control unit for driving the driving mechanism so that the meandering amount decreases based on the meandering amount signal output from the meandering amount detection sensor The apparatus for correcting a conveyance direction of a sheet-like body according to claim 1 or 2.   A detection sensor that detects that the guide cylinder and the support shaft have reached a predetermined limit angle is provided, and the detection sensor detects that the guide cylinder and the support shaft have reached a predetermined limit angle. 4. The apparatus according to claim 1, wherein the drive control unit stops the tilting of the guide cylinder.   The detection sensor for detecting the angular deviation of the guide cylinder relative to the support shaft is provided, and the drive control unit tilts the guide cylinder so that the angular deviation is not detected by the detection sensor. 1. A sheet direction conveying device for correcting a sheet according to 1, 2, 3, or 4. In the guide roller used in the conveyance direction correcting device for correcting the conveyance direction of the sheet-like body by tilting with respect to the conveyance direction of the stretched sheet-like body,
The guide roller is tiltably supported in a predetermined angular range with respect to the support shaft guide cylinder for conveying guiding the sheet-like body through its guide tube body portion,
The guide cylinder has a built-in drive mechanism including a drive source for tilting the guide cylinder within a required angle range with respect to the support shaft, and a pivot serving as a tilt center of the guide cylinder Is disposed in the center portion of the support shaft in a state offset from the axis of the support shaft, and both ends of the support shaft are supported outside the guide tube body. Guide roller used in the correction device.

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