JP5064874B2 - Sheet roll shape inspection apparatus and inspection method - Google Patents

Description

  The present invention relates to a shape inspection apparatus and an inspection method for a sheet roll such as a toilet roll.

  Conventionally, for example, as shown in FIG. 1 and FIG. 2, the sheet roll has a strip-like toilet sheet S having a width of about 80 to 300 mm and a length of about 25 to 100 m, which is cylindrical. It is made by being wound around a paper tube (core) C. However, when manufacturing this toilet roll R, generally, first, a wide toilet sheet having a width of about 1.8 to 5.5 m is wound around a paper tube having a length similar to the width of the toilet sheet. Thus, a wide toilet roll (this wide toilet roll is also referred to as a “paper log”, for example, but is simply referred to as a “raw roll” hereinafter) is manufactured, and this roll is appropriately placed in the width direction. The toilet roll R having a width of about 80 to 300 mm is obtained by cutting at intervals. Note that the cut surface Ra formed by the cutting, that is, the surface Ra formed by both side edges of the toilet sheet S is referred to as a “mirror surface”, for example.

  Here, the original fabric roll is cut so that the mirror surface of the toilet roll R formed by this cutting is perpendicular to the width direction (the axial direction of the paper tube C). The toilet roll R obtained by the cutting being vertically performed can be seen in a plan view as shown in FIG. 2 when viewed from any of the X1, X2, Y1, and Y2 directions in FIG. It becomes a square shape.

  And the toilet roll R manufactured in this way is, for example, polyethylene in a state where the total is 12 pieces, for example, 2 pieces each in the vertical and horizontal directions and 3 pieces in the height direction, as shown in FIG. It is stored in a packaging bag P made of a film or the like and sold.

However, when the toilet roll R is stored in the packaging bag P, the following problems may occur.
That is, the raw roll is cut continuously by, for example, a machine, but this cutting may not be performed perpendicular to the width direction of the toilet roll R. Specifically, when viewed from the X1 direction in FIG. 1, (1) in FIG. 4, when viewed from the X2 direction in FIG. 1, (2) in FIG. 4, and from the Y1 direction in FIG. 4 (3) and the case seen from the Y2 direction in FIG. 1 may be cut at an angle of θ ° from the vertical direction as shown in FIG. 4 (4). When a plurality of toilet rolls R are stored in the packaging bag P, all of the plurality of toilet rolls R can be cut vertically (hereinafter also simply referred to as “accepted products”). As shown in FIG. 5 (1), all of the plurality of toilet rolls R can be reliably stored in the packaging bag P. However, as shown in (2) of FIG. 5, a plurality of toilet rolls R include toilet rolls R2 that are not cut vertically (hereinafter also simply referred to as “failed products R2”). If it does, the length of the height direction in the state which put together the toilet roll R becomes long, and it may become impossible to accommodate all the several toilet rolls R in the packaging bag P. FIG.

Therefore, at present, as shown in FIG. 6, each mirror surface Ra is being transferred using the inspection apparatus 100 while the toilet roll R is being transferred on the conveyor 101 with each mirror surface Ra facing forward and backward in the transfer direction. Inspecting the shape, for example, whether it is perpendicular to the width direction (transfer direction) is performed. This inspection method is also referred to as “laying-pass sensor shape inspection method” or the like, and specifically, the inspection is performed as follows.
That is, first, in this conventional inspection apparatus 100, for example, laser light, infrared light, or the like is directed toward a height position where the lower end in the vertical direction of the toilet roll R in the state of being laid on the conveyor 101 passes. The height at which the first discriminating sensor 102 for discriminating whether or not the toilet roll R is passing by irradiating α and the central portion in the vertical direction of the toilet roll R (that is, the portion where the paper tube exists) passes. A second discrimination sensor 102 that discriminates whether or not the toilet roll R is passing by, for example, irradiating light β such as laser light or infrared light toward the position is provided. When the first discrimination sensor 102 determines that the toilet roll R is passing, if the second discrimination sensor 102 also determines that the toilet roll R is passing, it passes, otherwise. (It is to be noted that although this inspection device is currently used, no publication or the like in which information relating to this device was described was found).

  According to this inspection method, as shown in (1) of FIG. 7, the rejected product R2 is determined by the first determination sensor 102 to start passing the toilet roll R (this moment is indicated by reference numeral 102A). However, depending on the second determination sensor 103, it is not determined that the toilet roll R has started to pass, but it is determined that the passage has started with a delay of t seconds (this moment is indicated by reference numeral 103A). Similarly, even if the first discrimination sensor 102 determines that the passing of the toilet roll R (this moment is indicated by reference numeral 102B), the second discrimination sensor 103 determines that the passing of the toilet roll R has ended. Instead, it is determined that the passage has ended with a delay of t seconds (this moment is indicated by reference numeral 103B). Therefore, the rejected product R2 is determined as “failed” based on the difference between the start and end of passage.

  However, since this inspection is performed during the transfer of the toilet roll R, the toilet roll R is swaying, and thus an error occurs in determining the deviation between the passage start and the passage end. On the other hand, the inclination angle θ of the mirror surface Ra of the rejected product R2 is, for example, 1 to 5 °, and the toilet roll R is usually conveyed at a speed of about 0.5 to 1.0 m / second (note that The number of transported toilet rolls R is about 4 to 8 per second, and therefore, the toilet rolls R are transported on the conveyor 101 with an interval of about 10 mm.), Deviation between start and end of passage (time lag) Is 0.01 seconds or less. Therefore, if an error associated with the shaking of the toilet roll R is allowed, the reject product R2 may be determined as a pass product. On the other hand, if the error is not allowed, the pass product may be determined as a reject.

  In this regard, the second discrimination sensor 102 is irradiated with the light β not toward the height position where the vertical center portion of the toilet roll R passes but toward the height position where the upper end portion in the vertical direction passes. It seems possible to change the design to increase the difference between the start and end of passage, but it is not possible to change the design in this way. This is because the above-described inspection method for the rejected product R2 is the "peripheral surface of the rejected product R2" when viewed from the Y1 direction of FIG. 1, as shown in (1) and (2) of FIG. This is because it is assumed that the rejected product R2 is transferred so that That is, as shown in (3) and (4) of FIG. 4, the rejected product R2 is such that “the peripheral surface of the rejected product R2” when viewed from the X1 direction or the X2 direction of FIG. In some cases, it may be transported. In this case, if the design is changed, as shown in (2) of FIG. 7, there is no difference between the start and end of passage, and the rejected product R2 is determined to be a passed product. is there.

  The main problem to be solved by the present invention is to provide an apparatus and method that can inspect the shape of a sheet roll with high accuracy.

The present invention that has solved this problem is as follows.
[Invention of Claim 1]
A sheet roll shape inspection device for inspecting the shape of the sheet roll while transferring the sheet roll on the conveyor in a state where each mirror surface thereof is directed forward and backward in the transfer direction,
First imaging means for imaging the entire side surface from the side of the sheet roll being transferred; and second imaging means for imaging the entire plane from above the sheet roll substantially simultaneously;
Based on the image signal from the first imaging unit and the second imaging means, and an image analyzing means for obtaining a side surface shape及beauty flat surface shape of the sheet roll,
Prior to the transfer of the sheet roll to be inspected , imaging that is set in advance based on the side surface shape and the planar shape at the imaging point of the reference roll obtained by transferring a plurality of reference rolls that are accepted products at the point, the side shape upper reference frame and the planar shape upper reference frame, the allowable region between the side surface shape lower reference frame and the planar shape lower limit reference frame, each of the side shape and the planar shape of the sheet roll Pass / fail judgment means for judging that it is acceptable if it is present, and rejected if it is not present;
An apparatus for inspecting the shape of a sheet roll, comprising:

[Invention of Claim 2]
A sheet roll shape inspection method for inspecting the shape of the sheet roll while transporting on a conveyor, with each mirror surface facing the front and rear in the transport direction,
The entire side surface is imaged from the side of the sheet roll being transferred, and the entire plane is imaged substantially simultaneously from above the sheet roll. Based on the image signals obtained by these imaging, the side of the sheet roll to obtain a surface shape及beauty flat surface shape,
Prior to the transfer of the sheet roll to be inspected, it was set in advance based on the side surface shape and the planar shape at the imaging point of this reference roll obtained by transferring a plurality of reference rolls that were accepted products . The lateral shape of the sheet roll and the planar shape of the sheet roll are within an allowable area between the lateral shape upper limit reference frame and the planar shape upper limit reference frame and the lateral shape lower limit reference frame and the planar shape lower limit reference frame at the imaging point. When each is present, it is determined to pass, and when it does not exist, it is determined to be rejected.
A method for inspecting the shape of a sheet roll.

  According to the present invention, it is an apparatus and method that can inspect the shape of a sheet roll with high accuracy.

  Next, an embodiment of the present invention will be described. In addition, although this invention can be utilized as a shape inspection apparatus of sheet rolls, such as a toilet roll and a kitchen roll, for example, the case where a sheet roll is a toilet roll is demonstrated below as an example.

  In FIG. 8, the apparatus flowchart of the shape inspection apparatus 10 of this Embodiment was shown. As shown in FIG. 9, the present apparatus 10 inspects the shape of the toilet roll R while the toilet roll R is being transferred on the conveyor 101 with each mirror surface Ra facing forward and backward in the transfer direction. . And this apparatus 10 is the 1st imaging means 2 which images the whole side surface from the side of the toilet roll R in transfer, and the 2nd imaging means 3 which images the whole plane from the upper side of the toilet roll R substantially simultaneously. , With. A method for making the imaging by the first imaging means 2 and the second imaging means 3 not to be a part of the side surface or the plane of the toilet roll R, or the imaging substantially simultaneously. The method for making it perform is not specifically limited. In this embodiment, the position confirmation means 1 of the toilet roll R composed of a synchronous photoelectric tube or the like is provided, and when the position confirmation means 1 confirms that the toilet roll R has reached the imaging point, the imaging instruction signal is sent to the first imaging means. 2 and the second image pickup means 3 so that the first image pickup means 2 and the second image pickup means 3 pick up images substantially simultaneously.

  In the present embodiment, a specific device that can be used as the first image pickup unit 2 or the second image pickup unit 3 is not particularly limited, and as a commercially available product, for example, an image sensor manufactured by Keyence Corporation (model CV- 3000) or the like.

  Next, the data imaged by the first imaging unit 2 is transmitted to the image analysis unit 4 as a side image signal, and the data imaged by the second imaging unit 3 is transmitted as a plane image signal to the image analysis unit. 4 to send. Then, the image analysis means 4 obtains the side shape of the toilet roll R based on the side image signal from the first imaging means 2, and the toilet roll R based on the planar image signal from the second imaging means 3. Get a planar shape.

  Further, the side surface shape and the planar shape obtained in this way are input to the pass / fail determination means 5. The acceptance / rejection determination means 5 determines that the side surface shape is acceptable when the side surface shape is within a preset allowable region between the side surface shape upper limit reference frame and the side surface shape lower limit reference frame, and fails when the side surface shape does not exist. . Similarly, the pass / fail judgment means 5 passes the test if the plane shape is within the preset allowable area between the plane shape upper limit reference frame and the plane shape lower limit reference frame, and fails if it does not exist. judge.

Here, this pass / fail determination will be described in detail.
As described above, since this inspection is performed while the toilet roll R is being transferred on the conveyor 101, the toilet roll R is shaken by vibration or shaking of the conveyor 101. Therefore, in this inspection, an “upper limit reference frame” and a “lower limit reference frame” are set in advance, and pass and pass when there is a side shape or planar shape within the allowable area between them, and fail when there is no such shape. It is determined to pass. That is, since this inspection method has the concept of an allowable region, an error due to the shaking of the toilet roll R is allowed. Moreover, since this inspection method is not based on the time lag as in the conventional inspection method, but is based on the shape of the entire side surface and the entire plane of the toilet roll R, even if an error is allowed. There is little risk of a significant drop in inspection accuracy. Specifically, for example, as shown in FIG. 10, when the rear end of the toilet roll R in the transfer direction is swung so as to be in a floating state, according to the conventional inspection method, even if the product is acceptable, the first determination is made. A time lag occurs between the moment 102A at which the passage is determined to be started by the sensor 102 and the moment 103A at which the passage is determined to be started by the second determination sensor 103, so that it is determined as a rejected product. On the other hand, if the time lag is an allowable error, the rejected product is naturally determined as the acceptable product. However, since the inspection method according to the present embodiment is based on the shape of the toilet roll R, such a problem does not occur.

  By the way, since the toilet roll R is cylindrical, only one of the side shape and the planar shape is to be imaged, or the upper limit reference frame and the lower limit reference frame are the same in both the side shape and the planar shape. It seems likely. However, in the inspection method of the present embodiment, both the side shape and the planar shape are to be imaged, and the upper limit reference frame and the lower limit reference frame are separately set for each of the side shape and the planar shape. This is because this inspection is performed while the toilet roll R is being transferred on the conveyor 101, and since there are different swinging characteristics in the horizontal direction and in the vertical direction, the allowable area can be determined based on this characteristic. This is to limit the limit and improve the inspection accuracy.

In this embodiment, in order to set each reference frame, prior to the transfer of the toilet roll R to be inspected, a plurality of references that have been accepted (confirmed in advance) become toilet transferring the trawl R (reference roll), to give the side-sectional shape and a plan shape with this standard roll, based on the side shape and the planar shape of the reference roll, each reference frame (side shape upper reference frame, the planar shape upper reference frame, to set the side shape lower reference frame and the planar shape lower limit reference frame). According to this setting method, each reference frame is set after all conditions such as the environment such as temperature, humidity and the like that have a considerable influence on the state of the conveyor 101 and the physical properties of the toilet roll R are captured. Therefore, the allowable region can be further limited, and the inspection accuracy can be further improved.

In this embodiment, the reference rolls can be collectively transferred at the start of operation of the inspection apparatus, and each reference frame can be set. In addition, for example, when a plurality of toilet rolls R are continuously transferred, the reference rolls are also appropriately mixed and transferred, and when the inspection is continued while correcting each reference frame with the mixed reference rolls, the allowable area is always set. Since it becomes optimal, the inspection accuracy is further improved, which is preferable.

  In addition, the toilet roll R determined as acceptable by the above inspection can also be used as a reference roll. Further, the reference roll mixed in the plurality of toilet rolls R is transferred first in relation to the toilet roll R to be inspected.

  Next, a method for setting each reference frame will be described. Note that this setting method can be applied to the side surface shape of the toilet roll R as well as the planar shape. Hereinafter, a planar shape will be described as an example.

  First, the entire plane is imaged from above the reference roll being transferred, and plane shapes D1, D2, and D3 of the reference roll are obtained based on the image signal obtained by the imaging, as shown in FIG. FIG. 11 illustrates the case where three plane rolls are obtained by using three reference rolls, but the present invention is not limited to this. A mode of obtaining a plurality of plane shapes of four, five, six, or more is also conceivable, and the inspection accuracy improves when more plane shapes are obtained. The present inventors have confirmed that when each reference frame is set based on 2 to 5 plane shapes, the inspection accuracy is improved to 99% or more.

  When a plurality of planar shapes D1, D2, and D3 are obtained, as shown in (1) of FIG. 11, the shape line passing through the outermost of these planar shapes D1, D2, and D3 is connected, and the upper limit of the planar shape is obtained. The reference frame is Dm. Similarly, as shown in (2) of FIG. 11, among these planar shapes D1, D2, and D3, the shape line passing through the innermost side is connected to form the planar shape lower limit reference frame Dn. Then, as shown in FIG. 12, an area Dx between the planar shape upper limit reference frame Dm and the planar shape lower limit reference frame Dn is set as an allowable area.

  In the present embodiment, for the sake of explanation, the case where there are only three planar shapes has been described as an example, so that each reference frame Dm, Dn is a polygonal shape. However, the number of planar shapes is increased, smoothing, etc. The reference frame may be curved. In addition, the reference frames Dm and Dn can be similar in shape, for example, by 0.8 to 1.5 times the size.

  In determining whether the toilet roll R is acceptable or not by using the allowable area Dx obtained as described above, as shown in FIG. 13 (1) and (2), the allowable area Dx, the inspection target, When the planar shape Dr of the toilet roll R is overlapped and the planar shape Dr exists in the allowable area Dx, it is determined to be acceptable, and when it does not exist, it is determined to be unacceptable.

  On the other hand, as shown in (1) and (2) of FIG. 14, a part D1 of the planar shape Dr protrudes outside the allowable area Dx, or a part D2 of the planar shape Dr protrudes inside the allowable area Dx. If it is, the case where the planar shape Dr does not exist in the allowable area Dx is determined as rejected.

As described above, according to the inspection method of the present embodiment, whether or not the mirror surface Ra of the toilet roll R is vertical can be inspected with high accuracy. However, the following items are also inspected accordingly. become.
That is, in general, the toilet roll R is configured such that the tail portion Se of the toilet sheet S is glued or the like so that the toilet sheet S does not collapse from the paper tube C as shown in FIG. However, some toilet rolls R have the tail portion Se glued off as shown in FIG. The toilet roll R from which the tail portion Se has been peeled needs to be determined to be unacceptable as is the case with the toilet roll R whose mirror surface Ra is not vertical. The inspection of whether or not the tail portion Se has been peeled has to be performed by providing a separate inspection step in the case of the conventional inspection method. However, in the case of the inspection method according to the present embodiment, as shown in FIG. 16, a part D3 of the planar shape Dr formed by the edge of the tail part Se protrudes outside the allowable area Dx. Inspected at the same time as the R (mirror) shape inspection.

  In addition, some toilet rolls R have, for example, dents formed on the peripheral surface thereof, and such toilet rolls R need to be determined to be rejected in the same manner as the toilet rolls R whose mirror surface Ra is not vertical. is there. In the case of using the conventional inspection method, it is necessary to provide an inspection step separately to check whether or not the dent is formed. However, in the case of the inspection method of the present embodiment, as shown in FIG. 17, a part D4 of the planar shape Dr formed by the recessed portion protrudes inside the allowable area Dx. Mirror surface) Inspected simultaneously with shape inspection.

  As described above, when it is determined that at least one of the side surface shape and the planar shape is rejected, a reject signal is transmitted to the rejected product removing means 6 as shown in FIG. This rejected product exclusion means 6 excludes the toilet roll R that has been rejected from, for example, the conveyor 101. As the rejected product exclusion means 6, for example, a sequence controller (model KV-40AR) manufactured by Keyence Corporation can be used.

[Others]
(1) In this embodiment, the number of acceptable products of the toilet roll R and the number of unacceptable products are counted, and the number of unacceptable products is a predetermined ratio or more with respect to the count of acceptable products, for example, It is also preferable that an abnormal signal is generated when the value becomes 0.1% or more. If the rate of rejected products is high, there may be a failure in the roll of the raw material roll or the conveyor 101, etc., and it is possible to suppress the increase in manufacturing cost by removing these failures as soon as possible. Can do. The abnormal signal generated is transmitted to, for example, a control unit (not shown) of the conveyor 101 and used to stop the operation of the conveyor 101, to generate a warning sound, to turn on the patent light, etc. Can do.

(2) In the present embodiment, the first image pickup means 2 and the second image pickup means 3 are each provided as one, but the present invention is not limited to this. For example, a plurality of the pair of image pickup means 2 and 3 are provided at intervals in the transfer direction of the conveyor 101 to improve the inspection accuracy.

(3) As described above, the inspection method / apparatus of this embodiment can be used for, for example, inspection of kitchen rolls, etc. in addition to the inspection of toilet rolls, and the physical properties of the sheets constituting each roll, There is no particular limitation. Therefore, in the following, as an example, physical properties of the toilet roll and the like are illustrated.

[Toilet roll]
The toilet sheet constituting the toilet roll to be inspected by the apparatus / method of this embodiment may be one ply, two plies (a set of two sheets stacked), or more than one ply. . In the case of 1 ply, the basis weight (basis weight) of each sheet (one sheet) based on JIS P 8124 is preferably 11.0 to 35.0 g / m ² , and preferably 15.0 to 25.0 g / m ^2. More preferably, it is m ² . If the basis weight is less than 11.0 g / m ² , papermaking becomes difficult. On the other hand, when the basis weight exceeds 35.0 g / m ² , the softness is lowered, and the feeling of use and the like is lowered. Furthermore, the dry tensile strength in the machine direction per ply is preferably 150 to 550 cN / 25 mm. If the dry tensile strength is less than 150 cN / 25 mm, when the toilet roll is pulled out from a roll folder or the like in use, it is easy to tear, and it may be difficult for the user to cut the desired length. On the other hand, if it exceeds 550 cN / 25 mm, it may be difficult to cut to a desired length.

  When the toilet sheet is 1 ply, the softness is preferably 1.5 to 6.5 g. If this value is satisfied, the toilet seat is sufficiently soft.

On the other hand, when 2 plies are used, it is preferable that the basis weight (basis weight) of each sheet (one sheet) based on JIS P 8124 is 11.0 to 22.0 g / m ^2, and 13.0 to 18 More preferably, it is 0.0 g / m ² . If the basis weight is less than 11.0 g / m ² , papermaking becomes difficult. On the other hand, when the basis weight exceeds 22.0 g / m ² , the softness is lowered, and the feeling of use and the like is lowered. Further, the dry tensile strength in the machine direction per two plies is preferably 150 to 500 cN / 25 mm. If the dry tensile strength is less than 150 cN / 25 mm, and the dry tensile strength is less than 150 cN / 25 mm, the toilet roll is easily torn when being pulled out of the roll folder or the like. It may be difficult to cut with the On the other hand, if it exceeds 550 cN / 25 mm, it may be difficult to cut to a desired length.

  When the toilet sheet has two plies, the softness is preferably 1.0 to 4.0 g. If this value is satisfied, the toilet seat is sufficiently soft.

  Here, softness is a resistance value (average value in length and width) when a 10 cm wide toilet sheet is pushed into a gap of 5.0 mm width by a terminal, and means that the smaller the value, the softer. In this specification, softness means a value measured by the handle ohm method (JIS L 1096E method). The softness can be adjusted, for example, by changing the basis weight, the number of layers, the types of fibers and films forming the layers, the fusing process conditions, and the like.

  The raw material of the toilet sheet is not particularly limited, and an appropriate raw material can be used. When pulp fibers are used as the raw material, examples of the pulp fibers (raw pulp) include wood pulp, non-wood pulp, synthetic pulp, waste paper pulp, and the like, and more specifically, groundwood pulp (GP). , Stone Grand Pulp (SGP), Refiner Grand Pulp (RGP), Pressurized Ground Pulp (PGW), Thermomechanical Pulp (TMP), Chemi Thermomechanical Pulp (CTMP), Bleach Chemi Thermomechanical Pulp (BCTMP) (MP), chemical mechanical pulp (CGP), semi-chemical pulp (SCP), kraft pulp (KP) such as hardwood bleached kraft pulp (LBKP), softwood bleached kraft pulp (NBKP), soda pulp (AP), monkey Chemical pulp such as fight pulp (SP), dissolving pulp (DP) CP), nylon, rayon, polyester, synthetic pulp made from polyvinyl alcohol (PVA), deinked pulp (DIP), waste paper pulp such as waist pulp (WP), ground pulp (TP), cotton, flax, hemp 1 type or several types are appropriately selected from rag pulp, straw pulp, esparto pulp, bagasse pulp, bamboo pulp, kenaf pulp and other auxiliary pulp such as bast pulp, etc. Can be used.

  Raw materials such as pulp fibers can be made into a toilet sheet, for example, through a known papermaking process, specifically, a wire part, a press part, a dryer part, a size press, a calendar part, and the like. In this papermaking, for example, suitable chemicals such as a dispersant, caustic soda, aqueous ammonia and other pH adjusters, antifoaming agents, preservatives, fluorescent dyes, mold release agents, water resistance agents, flow modifiers, yield improvers, etc. Can be added.

  For example, a lotion chemical solution can be added to the toilet sheet. Here, the lotion chemical is mainly intended to increase the touch (texture), moisturize, soften the stimulation of the pulp fiber skin, or increase the moisturizing feeling. There is no particular limitation. For example, the moisturizing chemical solution includes at least one moisturizing agent selected from polysiloxanes such as silicone oil and silicone powder, polyhydric alcohols such as glycerin and propylene glycol, saccharides such as sorbitol and glucose, glycol solvents, and derivatives thereof. The thing using what contains this can be illustrated. Moreover, the above chemical | medical solution can use together the chemical | medical solution containing vitamin C, vitamin E, collagen, etc., for example. This type of chemical has a function to enhance the feeling of moisture. Vitamin C and vitamin E also function as antioxidants. Vitamin E is a component with a strong reducing power and has an antioxidative action that eliminates active oxygen and free radicals or prevents the generation of lipid peroxide. Therefore, vitamin E functions as a chemical liquid stabilizer, and exhibits an antioxidative effect on skin sebum and a blood circulation promoting effect. There is also a moisturizing function. Vitamin C, like vitamin E, has a sebum antioxidant effect. Vitamin C has the action of reducing vitamin E, so if both vitamin C and E are used, vitamin C works as an auxiliary to vitamin E, reducing vitamin E oxidized by active oxygen, etc. The effect | action which maintains the antioxidant effect | action of the powerful sebum of E is show | played. Collagen forms 90% of the dermis of the skin, and when this decreases, the skin loses moisture and tension. Therefore, it exhibits a moisturizing effect that moisturizes the skin when it comes into contact with the skin. Moreover, as a chemical | medical solution, especially when it is made into the weak acidity of pH 5.0-6.0, even if it makes it contact with skin, skin does not become alkaline, The rough skin by the influence of chemical | medical solution pH Can be effectively prevented. A particularly preferred pH range is 5.3 to 5.7. The pH can be adjusted by adding an acidic or basic pH adjuster to the chemical solution. When the chemical solution is strongly acidic, an aqueous sodium hydroxide solution or an aqueous potassium hydroxide solution can be used, In the case of neutral / alkaline, citric acid, malic acid and lactic acid can be used.

  Examples of the chemical solution for obtaining a refreshing feeling include sorbitol, altitol, xylitol, erythritol, lactitol, and palatinit. Particularly preferred are erythritol, xylitol, and sorbitol, and more preferred is erythritol or xylitol. Furthermore, one or two or more kinds of cooling sensitizers selected from the group of menthol, salicylic acid, α-cinerol, and derivatives thereof can be included.

  A typical example of a softener is a surfactant-type softener, and examples of the softener include anionic surfactants, nonionic surfactants, cationic surfactants, and zwitterionic surfactants. An anionic surfactant is particularly suitable. As the anionic surfactant, carboxylate, sulfonate, sulfate ester, phosphate ester, and the like can be used. An alkyl phosphate ester salt is particularly preferable.

  Examples of nonionic surfactants include sorbitan fatty acid esters, diethylene glycol monostearate, diethylene glycol monooleate, glyceryl monostearate, glyceryl monooleate, and polyhydric alcohol monofatty acid esters such as N- (3- Oleiroshiki-2-hydroxypropyl) diethanolamine, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitan beeswax, polyoxyethylene sorbitan sesquistearate, polyoxyethylene monooleate, polyoxyethylene monolaurate, polyoxyethylene cetyl ether Polyoxyethylene lauryl ether can be used.

  As the cationic surfactant, a quaternary ammonium salt, an amine salt, an amine, or the like can be used. In addition, as the zwitterionic surfactant, an aliphatic derivative of a secondary or tertiary amine containing carboxy, sulfonate, sulfate, an aliphatic derivative of a heterocyclic secondary or tertiary amine, or the like is used. be able to.

  As described above, various lotion chemicals can be used for the toilet seat, and in particular, liquid paraffin 5 to 20%, polyhydric alcohols 50 to 85%, sugars 3 to 30%, and if necessary It is preferable to use a chemical solution containing 5% or less of a nonionic surfactant as a main ingredient. When the amount of liquid paraffin added is less than 5%, the moist feeling is lowered, and the smoothness is lowered and rough. On the contrary, if it exceeds 20%, it gives a sticky feeling (sticky feeling), and also gives a rough feeling and a harder feeling. A more preferable range is 8 to 15%. In this embodiment, for example, as shown in JP-A-2-104511, skin oil removal characteristics can be obtained by mixing liquid paraffin without excessively removing the skin oil removal characteristics using polyhydric alcohol. Therefore, a moderate moist feeling can be obtained.

  The amount of polyhydric alcohol added is 50 to 85%. If it is less than 50%, the wiping effect and moist feeling are inferior. If it exceeds 85%, the amount of other components added is decreased, and the balance of the overall characteristics is deteriorated. In addition, the strength is deteriorated, the toilet sheet is easily torn, and a sticky feeling is given. The polyhydric alcohols are particularly preferably composed of glycerin, propylene glycol, or a mixture thereof.

  The amount of saccharide added is 3 to 30%. If it is less than 3%, the moist feeling and softness are reduced, and if it exceeds 30%, the balance of the overall characteristics is deteriorated, the strength is deteriorated, and the toilet sheet is easily broken. As the saccharide, those composed of sorbitol, glucose, or a mixture thereof are particularly suitable.

  Further, if necessary, 5% or less of a nonionic surfactant can be added. Nonionic active agents include sorbitan fatty acid esters, diethylene glycol monostearate, diethylene glycol monooleate, glyceryl monostearate, glyceryl monooleate, polyhydric alcohol monofatty acid esters such as propylene glycol monostearate, N- (3-oleoxy -2-hydroxypropyl) diethanolamine, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbit beeswax, polyoxyethylene sorbitan sesquistearate, polyoxyethylene monooleate, polyoxyethylene sorbitan sesquistearate, polyoxyethylene glyceryl mono Oleate, polyoxyethylene monostearate, polyoxyethylene monolaurate, polyoxyethylene monooleate, poly Carboxymethyl ethylene cetyl ether, and polyoxyethylene lauryl ether.

  Addition of these chemicals to the toilet sheet may be internal or external. In addition, secondary additives such as anionic surfactants, fragrances, colorants, preservatives, and antioxidants can be added to the chemical solution at a ratio of 1% or less.

  The present invention is applicable as a shape inspection apparatus and inspection method for a sheet roll such as a toilet roll.

It is a perspective view of a toilet roll. It is a side view of a toilet roll. It is a perspective view showing the state where a plurality of toilet rolls were put together and wrapped in a packaging bag. It is a figure at the time of seeing the toilet roll from which a mirror surface is not perpendicular | vertical from various directions. It is a top view in the case of trying to package a plurality of toilet rolls together with a packaging bag. It is a perspective view of the conventional test | inspection apparatus which test | inspects the toilet roll in transfer. It is explanatory drawing at the time of test | inspecting the toilet roll whose mirror surface is not perpendicular | vertical with the conventional test | inspection apparatus. It is an apparatus flowchart of the inspection apparatus of this form. It is a perspective view of the example of installation of the imaging means which images the toilet roll in transfer. It is explanatory drawing at the time of test | inspecting the shaken toilet roll with the conventional test | inspection apparatus. It is a figure for demonstrating the setting method of a planar shape upper limit reference frame and a planar shape lower limit reference frame. It is a figure for demonstrating the relationship between a planar shape upper limit reference frame and a planar shape lower limit reference frame, and an allowance area. It is a figure for demonstrating that the toilet roll with a perpendicular | vertical mirror surface is determined to be a pass. It is a figure for demonstrating that the toilet roll whose mirror surface is not perpendicular | vertical is determined to be disqualified. It is a top view of the toilet roll from which the tail part was peeled off. It is a figure for demonstrating that the toilet roll from which the tail part peeled is determined to be unacceptable. It is a figure for demonstrating that the toilet roll in which the dent was formed in the surrounding surface is determined to be disqualified.

  DESCRIPTION OF SYMBOLS 1 ... Position confirmation means, 2 ... 1st imaging means, 3 ... 2nd imaging means, 4 ... Image analysis means, 5 ... Pass / fail judgment means, 6 ... Unacceptable product exclusion means, 10 ... Inspection apparatus of this form, 100 ... Conventional inspection apparatus, 101 ... conveyor, 102, 103 ... discrimination sensor, C ... paper tube, D1, D2, D3, Dr ... planar shape, Dm ... planar shape upper limit reference frame, Dn ... planar shape lower limit reference frame, Dx ... Permissible area, P ... packaging bag, R ... toilet roll, Ra ... mirror surface, S ... toilet sheet, Se ... tail part.

Claims (2)

A sheet roll shape inspection device for inspecting the shape of the sheet roll while transferring the sheet roll on the conveyor in a state where each mirror surface thereof is directed forward and backward in the transfer direction,
First imaging means for imaging the entire side surface from the side of the sheet roll being transferred; and second imaging means for imaging the entire plane from above the sheet roll substantially simultaneously;
Based on the image signal from the first imaging unit and the second imaging means, and an image analyzing means for obtaining a side surface shape及beauty flat surface shape of the sheet roll,
Prior to the transfer of the sheet roll to be inspected , imaging that is set in advance based on the side surface shape and the planar shape at the imaging point of the reference roll obtained by transferring a plurality of reference rolls that are accepted products at the point, the side shape upper reference frame and the planar shape upper reference frame, the allowable region between the side surface shape lower reference frame and the planar shape lower limit reference frame, each of the side shape and the planar shape of the sheet roll Pass / fail judgment means for judging that it is acceptable if it is present, and rejected if it is not present;
An apparatus for inspecting the shape of a sheet roll, comprising: A sheet roll shape inspection method for inspecting the shape of the sheet roll while transporting on a conveyor, with each mirror surface facing the front and rear in the transport direction,
The entire side surface is imaged from the side of the sheet roll being transferred, and the entire plane is imaged substantially simultaneously from above the sheet roll. Based on the image signals obtained by these imaging, the side of the sheet roll to obtain a surface shape及beauty flat surface shape,
Prior to the transfer of the sheet roll to be inspected, it was set in advance based on the side surface shape and the planar shape at the imaging point of this reference roll obtained by transferring a plurality of reference rolls that were accepted products . The lateral shape of the sheet roll and the planar shape of the sheet roll are within an allowable area between the lateral shape upper limit reference frame and the planar shape upper limit reference frame and the lateral shape lower limit reference frame and the planar shape lower limit reference frame at the imaging point. When each is present, it is determined to pass, and when it does not exist, it is determined to be rejected.
A method for inspecting the shape of a sheet roll.

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