JP3643352B2 - Toilet paper sheet roll inspection method and inspection apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an inspection method and inspection apparatus for toilet paper sheet roll.
[0002]
[Prior art]
One of the quality inspections of toilet paper sheet rolls is inspection of roll width. This inspection is performed, for example, in the process of conveying the sheet roll along the production line.
Specifically, as shown in FIG. 1, the sheet rolls T, T... Are transported in the roll width direction from the viewpoint of increasing the transport speed, particularly in the state where the outer peripheral surface is placed on the planar transport surface 100. In a production line that is conveyed in a direction directed to the direction, an appearance imaging unit 101 such as a CCD (Charge Coupled Device) camera is placed on a sheet roll T1 to be inspected at a predetermined position, for example, from the side or from the top as shown in the figure. Then, the roll width of the sheet roll T1 is inspected from the captured image obtained by this imaging.
[0003]
[Problems to be solved by the invention]
However, this conventional method has not had sufficient inspection accuracy. This is due to the occurrence of “blurring” in the captured image. This “blurring” of the captured image is a state in which the sheet roll T1 to be inspected is lying on its outer peripheral surface on the planar conveying surface 100. The sheet roll T1 being conveyed in the roll width direction, that is, the sheet roll T1 being conveyed in a direction in which the inspection result is likely to be affected. Is.
[0004]
In addition, the target sheet roll is “a sheet in which a sheet is wound in a cylindrical shape on a paper tube” or “a sheet having a hollow portion in which a sheet is wound in a cylindrical shape (so-called coreless sheet roll)” If there is, for example, (1) as shown in FIG. 7A, the paper tube S (in the case of a coreless sheet roll, the portion facing the inner space) is twisted Sa (strictly, the cause of the twist) (2) As shown in FIGS. 7 (A) and 7 (B), the sheet has 皺 Ta (rolled by this 皺 Ta) due to incomplete winding of the sheet, etc. It is necessary to perform an appearance inspection such as whether or not irregularities are formed on the surface.
[0005]
However, in the conventional method, these appearance inspections ((1) and (2)) are performed by visual inspection by an inspector in a process after the roll width inspection. Therefore, the work efficiency is very poor.
[0006]
Then, the main subject of this invention is providing the inspection method and inspection apparatus of the toilet paper sheet roll which can improve an inspection precision. Moreover, the main subject of this invention is providing the inspection method and inspection apparatus of the toilet paper sheet roll which can improve work efficiency.
[0007]
[Means for Solving the Problems]
The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
A method of inspecting in the process of transporting a toilet paper sheet roll wound in a cylindrical shape,
In the upstream line and the downstream line, the sheet roll is transported in a state where the axis is aligned in the transport direction and the outer peripheral surface is placed on the planar transport surface, and the sheet roll is transported between the upstream line and the downstream line. A facility configuration with an inspection line with a surface,
The starting end of the inspection line is set at a lower position than the leading end of the upstream line, and the roll surface is changed to a planar conveyance surface of the inspection line by a change in posture of the sheet roll in the process of dropping and transferring from the upstream line to the inspection line. Ground the sheet roll in a standing state in this cylindrical posture,
The lower end of the downstream line is lower than the leading end of the inspection line, and the axis is aligned in the conveying direction by the change in posture of the sheet roll in the process of dropping and transferring from the inspection line to the downstream line. Let's lie down on a flat transfer surface,
The planar conveying surface of the inspection line is composed of two bars whose surface in contact with the sheet roll is a flat surface, or is formed of a transparent material,
In the process of conveying the sheet roll in the upright position in the inspection line, the portion facing the inner space portion when at least below the sheet roll by optical appearance detecting means of the paper tube or coreless sheet roll A method for inspecting a toilet paper sheet roll, characterized by inspecting at least one of twist and wrinkles .
[0008]
<Invention of Claim 2>
The method for inspecting a toilet paper sheet roll according to claim 1 , further comprising inspecting a roll width from a side in a process of conveying the sheet roll in the standing state on the inspection line .
[0009]
<Invention of Claim 3>
A device for inspecting in the process of transporting a toilet paper sheet roll wound in a cylindrical shape ,
In the upstream line and the downstream line, the sheet roll is transported in a state where the axis is aligned in the transport direction and the outer peripheral surface is placed on the planar transport surface, and the sheet roll is transported between the upstream line and the downstream line. A device configuration with an inspection line having a surface,
The starting end of the inspection line is set at a lower position than the leading end of the upstream line, and the roll surface is changed to a planar conveyance surface of the inspection line by a change in posture of the sheet roll in the process of dropping and transferring from the upstream line to the inspection line. Means for grounding and conveying the sheet roll in an upright state in this cylindrical posture;
The lower end of the downstream line is lower than the leading end of the inspection line, and the axis is aligned in the conveying direction by the change in posture of the sheet roll in the process of dropping and transferring from the inspection line to the downstream line. Means for lying on a flat conveyance surface,
The planar conveying surface of the inspection line is composed of two bars whose surface in contact with the sheet roll is a flat surface, or is formed of a transparent material,
In the process of conveying the sheet roll in the standing state in the inspection line, the optical appearance detection means twists the portion facing the inner space in the case of a paper tube or a coreless sheet roll from at least the lower side of the sheet roll. And an inspection device for a toilet paper sheet roll, characterized by comprising means for inspecting at least one of the wrinkles .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below.
<Definition>
(1) In the present invention, the “roll width” refers to the length of the sheet roll in a direction that coincides with the width direction of the wound sheet.
The roll width and the sheet width do not necessarily coincide completely. If they completely match, it means that the sheet is wound without any deviation in the sheet width direction. If these discrepancies seem to be large, it means that the winding of the sheet is greatly deviated in the sheet width direction.
[0011]
(2) In the present invention, the “roll surface” refers to the end surface in the width direction of the sheet roll. It is a portion that is a donut-shaped flat surface.
[0012]
<Object of inspection>
The inspection method and the inspection apparatus according to the present invention use a toilet paper sheet roll , that is, a belt-shaped sheet wound in a multilayer shape in a cylindrical shape as a roll object.
The type of the sheet roll that is the object is not particularly limited. Also, the sheet roll has a paper tube (core) (a sheet roll in which sheets are wound in a cylindrical shape on a paper tube), and does not have a sheet (sheet) Are sheet rolls having inner space portions wound in a cylindrical shape in multiple layers.
[0013]
Hereinafter, in this embodiment, a case where a paper tube is provided will be described.
<Inspection item>
The inspection items by the inspection method and inspection apparatus according to the present invention relate to the appearance of the sheet roll such as the roll width, but the specific contents are not particularly limited. However, when the items shown in the following (1) to (3) are used as inspection items, the present invention has particularly excellent operational effects as compared with the conventional method.
The inspection items are (1) inspection of roll width, (2) inspection of twist of paper tube (portion facing the inner space), and (3) inspection of wrinkles of the sheet. The item (2) and the item (3) are collectively referred to as a roll surface inspection.
[0014]
Hereinafter, in the present embodiment, the case where the items (1) to (3) are inspected will be mainly described.
<Outline of inspection method>
The inspection method according to the present invention is a method for inspecting in the process of conveying a toilet paper sheet roll, wherein the sheet roll to be inspected is conveyed in a standing state in a cylindrical posture, and the toilet paper is detected by an optical appearance detection means. It is characterized by inspecting the appearance of the sheet roll.
In the conventional method, since the sheet rolls T1 and T1 to be inspected are in a sleeping state with their outer peripheral surfaces placed on the planar conveying surface 100 as shown in FIG. Even if a mechanism for preventing the rolls of the sheet rolls T1 and T1 from being provided by an auxiliary material or the like was provided, it was unstable. On the other hand, in the method of the present invention, the sheet rolls T1 and T1 to be inspected are in the standing state in the cylindrical posture. Specifically, for example, as shown in FIG. Since the one end surface (roll surface) is placed on the planar conveyance surface 10 and the other end surface (roll surface) faces upward, it is stable, and therefore the inspection accuracy can be improved.
[0015]
In particular, when inspecting the roll width of the sheet rolls T, T..., According to the conventional method, the sheet rolls T, T... Since the rolls T, T... Are being transported, the inspection itself is easily affected by the transport itself, and therefore the measurement error is large. On the other hand, according to the method of the present invention, since there is no movement of the sheet rolls T, T... In the roll width direction, such a problem does not occur, and therefore the inspection accuracy is improved.
[0016]
In the case of inspecting the roll surface, according to the conventional method, as shown in FIG. 1, from the front oblique upper side (or front oblique side) M of the target sheet roll T1, or the rear oblique upper side (or rear). Since the inspection must be performed from (diagonal side) U, excellent inspection accuracy cannot be obtained. On the other hand, according to the method of the present invention, as shown in FIG. 3, it can be performed from above (for example, directly above α) or below (for example, directly below β) of the target sheet roll T1, so such a problem. Therefore, the inspection accuracy can be improved. In particular, when this inspection is performed by an external imaging means such as a CCD camera and based on the density of the captured image obtained by this imaging, shadows are likely to occur when the image is captured from an oblique direction, and the captured image is shaded. There is a difference that it is difficult to obtain an accurate inspection result due to the influence, but an accurate inspection result can be obtained since imaging does not cause such a problem if the image is taken from the vertical direction.
[0017]
<Specific example of inspection device>
Next, an example of an apparatus embodying the method of the present invention described above will be described.
The inspection apparatus of the present invention is an apparatus that inspects the toilet paper sheet roll in the process of conveying the toilet paper sheet roll along the inspection line, and the inspection line includes a sheet roll standing means and a sheet roll lying means, Further, in the standing position by the sheet roll standing means on the inspection line, that is, for example, at the position where the sheet roll is in the standing state with one end surface thereof placed on the planar conveyance surface and the other end surface thereof facing upward. An inspection means for inspecting the appearance is provided.
[0018]
As an inspection means for inspecting the appearance of the sheet roll, for example, an optical appearance detection means such as an optical sensor or an appearance imaging means can be used. Further, upstream and downstream of the inspection line can be provided with an upstream line or a downstream line that conveys the outer peripheral surface of the sheet roll while lying on a flat conveyance surface.
[0019]
In particular, in the present embodiment in which the roll width and the roll surface are inspection items, the optical appearance detection means is arranged on the inspection line with a first appearance imaging means arranged on the side of the line facing the inspection line. And the second appearance imaging means arranged at least one above and below the line, inspecting the roll width of the sheet roll based on the image taken from the first appearance imaging means, and from the second appearance imaging means It is preferable to inspect at least one of the twist of the paper tube (portion facing the inner space) of the sheet roll and the sheet wrinkle based on the captured image.
[0020]
Specific examples of this inspection apparatus are shown in FIGS.
The inspection apparatus 1 is installed on both sides of the main conveyance device 40 constituting the “inspection line” provided with the appearance imaging means (A, B, C) of the sheet rolls T, T. And, for example, an auxiliary transport machine 20 or 30 constituting an “upstream line” or “downstream line” connected to a conventional transport machine (not shown).
[0021]
One auxiliary transfer machine 20 constituting the upstream line includes a main body 21 having a flat transfer surface, a drive source M including an electric motor for driving the transfer surface of the main body 21, and the main body 21 as a floor surface. It is mainly composed of four leg portions 22, 22... Attached to the four corners of the main body portion 21 supported on the G.
[0022]
The auxiliary transporter 20 is a main transporter in a state where the sheet rolls T, T... Received from a conventional transporter or the like are in a state where the outer peripheral surface is placed on the transport surface and the roll width direction faces the transport direction. Transport to machine 40.
[0023]
In the present embodiment, the transport surface of the auxiliary transport machine 20 is parallel to the floor surface G, that is, horizontal. However, it does not have to be horizontal and can be given an appropriate angle.
[0024]
In the present embodiment, the auxiliary transporter 20 transports the sheet rolls T, T... In two rows and slightly away from the auxiliary transporter 20 in the width direction on the main transporter 40 side. However, the present invention is not limited to this, and conveyance in one row, conveyance in three rows, conveyance in four rows, and the like are also possible, and conveyance in the longitudinal direction of the auxiliary conveyance device 20 may be completely parallel. Is possible.
[0025]
The main transfer machine 40 constituting the inspection line includes a main body 41 having a flat transfer surface, a drive source M including a power supply motor for driving the transfer surface of the main body 41, and the main body 41 on the floor G. It is mainly composed of four leg portions 42, 42... Attached to the main body portion 41 to be supported at an appropriate interval.
[0026]
The conveyance surface of the main conveyance machine 40 is equipped with conveyance position restraining auxiliary materials 43, 43,. The sheet rolls T, T... Are transported in two rows on the transport surface toward the auxiliary transport machine 30 by the action of the transport position restraining auxiliary materials 43, 43. However, it is not limited to the conveyance in two rows, as in the case of the auxiliary conveyance machine 20.
[0027]
The conveyance surface of the main conveyance device 40 is lower on the auxiliary conveyance device 20 side than the conveyance surface of the auxiliary conveyance device 20. This height difference is provided as a means for raising the sheet rolls T, T.
That is, as shown in FIG. 6A, when the sheet roll T is conveyed to the front end portion of the auxiliary conveyance device 20, the front end portion (of the sheet roll T) protrudes from the conveyance surface of the auxiliary conveyance device 20. It will be in the state. Then, when the protruding front end receives a downward force due to gravity (natural force), the sheet roll T rotates and is grounded as it is from the roll surface of the front end on the transport surface of the main transporter 40. That is, it becomes a standing state. In this way, the stand-up means is realized only by the difference in height of the conveying surface, and no additional processing such as standing by a machine is performed, so that the conventional method (sheet rolls T, T... A processing speed not inferior to that of the inspection method can be expected. Moreover, since the above-mentioned standing-up method uses a natural force and is not performed using a machine, it is also freed from a situation where the processing efficiency is lowered due to a mechanical failure.
[0028]
For toilet paper (paper width 114 mm, tolerance ± 2 mm) based on the JIS P4501 standard, the transport speed of the auxiliary transport machine 20 is 30 to 60 [m / min], and the transport speed of the main transport machine 40 is the auxiliary transport machine. When the conveying speed of 20 is 80 to 90 [%] and the height difference between the conveying surface of the auxiliary conveying device 20 and the conveying surface of the main conveying device 40 is 4 to 10 [cm], it is about 1 million sheet rolls. In the operation, there was no toilet paper that failed to stand up.
[0029]
The sheet rolls T, T... That have been brought up in the above manner are subjected to an inspection process in the process of being conveyed by the main conveyance device 40.
That is, first, at the point A, as shown in FIG. 3, the sheet roll T1 to be inspected is viewed from above, preferably directly above α, by a (second) appearance imaging means such as a CCD camera (not shown). Thus, the upper roll surface is imaged. Then, based on the density of the captured image obtained by this imaging, there is a twist Sa of the paper tube (portion facing the inner space) as shown in FIG. An inspection is performed for the presence of the wrinkles Ta on the sheets shown in A) and (B). When the paper tube S has a twisted Sa, a positional deviation occurs in the density of the captured image, and when the sheet Ta is formed on the sheet such as the paper tube S due to inadequate winding of the sheet. The density appears in the captured image due to the unevenness of the roll surface. Therefore, for example, the inspection can be realized by comparing the image information input in advance with an inspection means including an electronic computer (not shown).
[0030]
In this embodiment, the twisted Sa of the paper tube (the portion facing the inner space) and the sheet flange Ta are used as inspection items, but the present invention is not limited to this. If such a captured image is used, for example, an appearance inspection such as whether the sheet tail is peeled off can be performed.
[0031]
In addition, it is said that the sheet tack Ta is generally easily formed on the side of the paper tube S (side of the inner space), and is also formed on the side of the paper tube S in FIGS. 7A and 7B. Shows a spear. However, the sheet wrinkles that can be the object of inspection in the method / equipment of the present invention are not limited to such. A wrinkle formed at any place on the roll surface can be an inspection target.
[0032]
The sheet roll T1 for which the upper roll surface has been inspected as described above continues to be conveyed in an upright state, and at a point B, from below by a (second) appearance imaging means including a CCD camera (not shown). The image of the lower roll surface is preferably taken from directly below β. The inspection contents (items) based on this imaging, the inspection principle, and the operational effects of the inspection are the same as those at the point A.
[0033]
However, in the case of imaging from directly below β (downward), the conveyance surface 10 can be an obstacle, unlike the case of imaging from directly above α (upper). Therefore, in the present embodiment, as shown in an enlarged manner in FIG. 5, the transport surface 10 is configured by two bars 10A and 10A having a flat surface in contact with the roll surface. As a result, imaging from directly below β (downward) becomes possible. If it is desired to further ensure the imaging from directly below β (downward), the conveying surface 10 or the rods 10A and 10A may be formed of a transparent material.
[0034]
As described above, in the present embodiment, both the “twisting of the paper tube (portion facing the inner space)” and the “sheet wrinkle” are inspected, but only one of them can be inspected. In particular, when only “twisting of the paper tube (portion facing the inner space)” is an inspection item, substantially the same effect can be obtained by inspection from only one of the upper side and the lower side. When the inspection is performed from only one of the upper side and the lower side, it is preferable to perform the inspection only from the lower side. This is because the sheet roll has less “blur” on the lower end side.
[0035]
The sheet roll T1 subjected to the inspection of the lower roll surface as described above continues to be conveyed in an upright state, and at point C, from an optical appearance detection unit (not shown), particularly in this embodiment, from a CCD camera or the like. Imaging is performed from the side, preferably from both sides, by the external imaging means. Based on the captured image obtained by this imaging, the roll width is measured, and further, it is determined whether or not the roll width is within an allowable range. These analyzes can be performed by an inspection unit (not shown) including, for example, an electronic computer. Even if this inspection means is the same as the inspection means for analyzing (contrast) the captured image obtained at point A and the inspection means for analyzing (contrast) the captured image obtained at point B, May be different.
[0036]
As an optical appearance detecting means for inspecting the roll width, for example, an optical sensor for irradiating laser light or the like can be cited, and the roll width can be sufficiently inspected by a detection signal thereby. However, the appearance imaging means is preferable because it is excellent in accuracy and can simultaneously inspect whether the seat tail portion is peeled off, for example. Note that the inspection of the sheet tail or the like can be performed based on the density of the obtained captured image, similarly to the inspection of the roll surface.
[0037]
The sheet rolls T, T... That have been inspected as described above continue to be conveyed in an upright state, and are sent from the front end to the auxiliary conveyance device 30 that forms the downstream line.
The auxiliary transport machine 30 has the same configuration as that of the auxiliary transport machine 20 (but is installed symmetrically). That is, at the four corners of the main body 31 that has a planar conveyance surface, a drive source M that includes an electric motor that drives the conveyance surface of the main body 31, and the main body 31 that supports the main body 31 on the floor G. It is mainly composed of four attached leg portions 32, 32. Moreover, the point which the conveyance surface of the auxiliary conveyance machine 30 is horizontal, but can also give an appropriate angle is the same as that of the auxiliary conveyance machine 20.
[0038]
The auxiliary transport device 30 thus configured is a state in which the sheet rolls T, T... From the main transport device 40 are in a lying state with their outer peripheral surfaces placed on the transport surface, and the roll width direction faces the transport direction. For example, it conveys to the conventional conveyance machine etc. which are not illustrated.
[0039]
The sheet rolls T, T... That have been standing in the main transporter 40 are in a state of being laid down in the auxiliary transporter 30, similar to the connecting portions of the auxiliary transporter 20 and the main transporter 40. By adopting the configuration.
That is, the conveyance surface of the main conveyance device 40 is higher on the auxiliary conveyance device 30 side than the conveyance surface of the auxiliary conveyance device 30. As a result, as shown in FIG. 6B, when the sheet roll T is conveyed to the front end portion of the main conveyance device 40, the upper end portion (of the sheet roll T) is on the conveyance surface of the auxiliary conveyance device 30. I fell down and fell asleep. The effect by having such a structure is the same as that of making it stand up mentioned above.
[0040]
<Supplementary information on inspection equipment>
(1) The inspection apparatus 1 is configured such that the conveyance surface of the auxiliary conveyance device 20 and the conveyance surface of the auxiliary conveyance device 30 have the same height and the conveyance surface of the main conveyance device 40 is slightly upward. However, it is not limited to this. For example, the conveyance surface can be configured to be lower in the order of the auxiliary conveyance device 20, the main conveyance device 40, and the auxiliary conveyance device 30.
[0041]
(2) In the inspection apparatus 1, by adjusting the heights of the both end portions of the main transporter 40, the sheet roll standing means or the lying means is configured. However, the standing means and the lying means are not necessarily provided at both ends of the main transporter (inspection line) 40. That is, the standing means and the lying means can be provided in the middle of the main transfer machine (inspection line) 40.
[0042]
(3) When the standing posture position (between the standing means and the overturning means) of the sheet roll is short, such as when the standing means and the overturning means are provided in the middle of the main conveyance machine (inspection line) 40, the appearance The detection means (A, B, C) can also be provided at the same position.
[0043]
(4) In the inspection apparatus 1, the auxiliary transporter 30 is provided after the main transporter 40. However, it is not limited to this. For example, it is possible to connect a conventional transfer device directly after the main transfer device 40 without passing through the auxiliary transfer device 30 or connect another device.
[0044]
【The invention's effect】
As described above, according to the present invention, an inspection method and an inspection apparatus for a toilet paper sheet roll capable of improving inspection accuracy are provided. Moreover, according to this invention, it becomes the inspection method and inspection apparatus of the toilet paper sheet roll which can improve work efficiency.
[Brief description of the drawings]
FIG. 1 is a diagram for explaining a conventional inspection method.
FIG. 2 is a diagram for comparing a conveyance state according to a conventional method and a conveyance state according to the method of the present invention;
FIG. 3 is a diagram for explaining a sheet roll conveyance state and an imaging method;
FIG. 4 is a side view of the inspection apparatus according to the present embodiment.
FIG. 5 is a plan view of the inspection apparatus according to the present embodiment.
FIG. 6 is a diagram for explaining a state change of a sheet roll.
FIG. 7 is a diagram for explaining twisting of a paper tube (portion facing the inner space) and sheet wrinkling.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Inspection apparatus, 10,100 ... Conveyance surface, 20, 30 ... Auxiliary conveyance device, 40 ... Main conveyance device, G ... Floor surface, M ... Drive source, S ... Paper tube, T ... Toilet paper sheet roll.

Claims (3)

A method of inspecting in the process of transporting a toilet paper sheet roll wound in a cylindrical shape,
In the upstream line and the downstream line, the sheet roll is transported in a state where the axis is aligned in the transport direction and the outer peripheral surface is placed on the planar transport surface, and the sheet roll is transported between the upstream line and the downstream line. A facility configuration with an inspection line with a surface,
The starting end of the inspection line is set at a lower position than the leading end of the upstream line, and the roll surface is changed to a planar conveyance surface of the inspection line by a change in posture of the sheet roll in the process of dropping and transferring from the upstream line to the inspection line. Ground the sheet roll in a standing state in this cylindrical posture,
The lower end of the downstream line is lower than the leading end of the inspection line, and the axis is aligned in the conveying direction by the change in posture of the sheet roll in the process of dropping and transferring from the inspection line to the downstream line. Let's lie down on a flat transfer surface,
The planar conveying surface of the inspection line is composed of two bars whose surface in contact with the sheet roll is a flat surface, or is formed of a transparent material,
In the process of conveying the sheet roll in the standing state in the inspection line, the optical appearance detection means twists the portion facing the inner space in the case of a paper tube or a coreless sheet roll from at least the lower side of the sheet roll. And a method for inspecting a toilet paper sheet roll, wherein at least one of the ridges is inspected. The method for inspecting a toilet paper sheet roll according to claim 1 , further comprising inspecting a roll width from a side in a process of conveying the sheet roll in the standing state on the inspection line . A device for inspecting in the process of transporting a toilet paper sheet roll wound in a cylindrical shape ,
In the upstream line and the downstream line, the sheet roll is transported in a state where the axis is aligned in the transport direction and the outer peripheral surface is placed on the planar transport surface, and the sheet roll is transported between the upstream line and the downstream line. A device configuration with an inspection line having a surface,
The starting end of the inspection line is set at a lower position than the leading end of the upstream line, and the roll surface is changed to a planar conveyance surface of the inspection line by a change in posture of the sheet roll in the process of dropping and transferring from the upstream line to the inspection line. Means for grounding and conveying the sheet roll in an upright state in this cylindrical posture;
The lower end of the downstream line is lower than the leading end of the inspection line, and the axis is aligned in the conveying direction by the change in posture of the sheet roll in the process of dropping and transferring from the inspection line to the downstream line. Means for lying on a flat conveyance surface,
The planar conveying surface of the inspection line is composed of two bars whose surface in contact with the sheet roll is a flat surface, or is formed of a transparent material,
In the process of conveying the sheet roll in the standing state in the inspection line, the optical appearance detection means twists the portion facing the inner space in the case of a paper tube or a coreless sheet roll from at least the lower side of the sheet roll. And an inspection device for a toilet paper sheet roll, characterized by comprising means for inspecting at least one of the wrinkles .

Images