Coating equipment

Abstract

To provide coating equipment that can more uniformly coat a tail seal of a sanitary paper rolled product with adhesive by restraining bending of a coating bar taking into consideration the size and weight of the coating bar.SOLUTION: The present invention is coating equipment 100 for providing a tail seal by suspending and vertically moving opposite end parts of a coating bar 1 to push a tip of the coating bar 1 coated with an adhesive against a paper log of sanitary paper. The coating bar 1 includes: a frame component 111; and a bar part 112 fixed to the frame component 111 and having a coating member 113 attached to the tip thereof. The frame component 111 has a functional portion for correcting deformation of the bar part 112 in the gravity direction.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a coating facility for performing tail seal processing on a toilet paper roll-shaped product.

Background Art

[0002] Conventionally, in a toilet paper roll-shaped product obtained by winding toilet paper such as toilet paper or kitchen paper (including paper kitchen towels) into a roll, the end portion after winding (hereinafter, also referred to as the "tail portion") is sealed (glued), and various methods have been used for the coating for providing the seal (hereinafter, also referred to as the "tail seal") of this tail portion.

[0003] For example, coating by a wire is lightweight and requires a small facility, but since the wire bends when it contacts the roll during coating, it is difficult to make the coating uniform. Also, coating by a spray has problems such as nozzle clogging, and coating by a coating bar can be considered as another method.

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, even in coating by a coating bar, there is a possibility that the adhesive cannot be applied evenly well in the tail seal of the toilet paper roll-shaped product because the coating bar bends due to gravity. Here, if a wide metal plate is simply used for the coating bar in order to suppress the bending of the coating bar, it is conceivable that both the size and weight of the coating bar increase, and the size of the facility for installing the coating bar increases.

[0005] An object of the present invention is to provide a coating facility that can suppress the bending of a coating bar while considering the size and weight of the coating bar, and can apply an adhesive more uniformly in the tail seal of a toilet paper roll-shaped product.

Means for Solving the Problems

[0006] A first embodiment of the coating equipment according to the present invention is a coating equipment for providing a tail seal by suspending and moving both ends of a coating bar up and down, thereby pressing the tip of the coating bar, to which adhesive has been applied, against a paper log of sanitary paper, wherein the coating bar comprises a frame component and a bar component fixed to the frame component and to which a coating member is attached at its tip, and the frame component is characterized by having a functional part that corrects deformation of the bar component in the direction of gravity.

[0007] A second embodiment of the coating equipment according to the present invention is described as the first embodiment, characterized in that the functional part comprises a plurality of adjustment bolt holes provided at predetermined intervals in the frame component, and adjustment bolts and nuts for adjustment bolts that pass through the adjustment bolt holes to adjust the distance between the frame component and the bar component in the direction of gravity. [Effects of the Invention]

[0008] According to the present invention, by providing a function to adjust the curvature of the coating bar, a narrow and lightweight coating bar can be used, which in turn reduces the size of the coating equipment. Furthermore, by being able to finely adjust the curvature of the coating bar, the application of adhesive in the tail seal can be made more uniform. [Brief explanation of the drawing]

[0009] [Figure 1] This is a schematic block diagram of a coating equipment according to the first embodiment of the present invention. [Figure 2] This figure shows a frame component of a coating bar according to a first embodiment of the present invention, where (a) is a plan view seen from the side, and (b) is a cross-sectional view of (a) in the direction IIb-IIb. [Figure 3] This figure shows a bar component of a coating bar according to a first embodiment of the present invention, where (a) is a plan view seen from the side, and (b) is a cross-sectional view of (a) in the direction IIIb-IIIb. [Figure 4]This figure shows a state in which a bar component is assembled to a frame component according to the first embodiment of the present invention, where (a) is a plan view seen from the side, and (b) is a cross-sectional view in the direction of IVb-IVb in (a). [Figure 5] This figure illustrates the shape of the tip edge of a coating member according to a modified example of the first embodiment of the present invention. [Figure 6] This figure shows a frame component of a coating bar according to a second embodiment of the present invention, where (a) is a plan view seen from the side, and (b) is a cross-sectional view of (a) in the direction VIb-VIb. [Modes for carrying out the invention]

[0010] Embodiments of the coating equipment according to the present invention will be described in detail with reference to Figures 1 to 6. However, the present invention is not limited to these embodiments.

[0011] In this specification and in the claims, "sanitary paper" includes, as described above, toilet paper, kitchen paper (including paper kitchen towels), etc.

[0012] Furthermore, in this specification and the claims, "up and down" is merely a convenient term, such as representing directions A and B in Figure 1, and does not define an absolute position in the direction of gravity.

[0013] In this specification and in the drawings, "n" represents a positive integer.

[0014] <First Embodiment> Figure 1 shows a schematic block diagram of the coating equipment 100 according to the first embodiment of the present invention. Figure 2 is a schematic diagram showing the frame component 111 of the coating bar 1 according to this embodiment, where Figure 2(a) is a plan view from the side and Figure 2(b) is a cross-sectional view of Figure 2(a) in the direction of IIb-IIb. Figure 3 is a schematic diagram showing the bar component 112 of the coating bar 1 according to this embodiment, where Figure 3(a) is a plan view from the side and Figure 3(b) is a cross-sectional view of Figure 3(a) in the direction of IIIb-IIIb. Figure 4 shows the state in which the bar component 112 is assembled to the frame component 111 and the coating member 113 is assembled, where Figure 4(a) is a plan view from the side and Figure 4(b) is a cross-sectional view of (a) in the direction of IVb-IVb. However, in Figure 4(b), for the sake of explanation, the side view of each bolt Ma1~Man and Mb1~Mbn is shown instead of the cross-section.

[0015] The coating equipment 100 according to the present invention is for providing a tail seal by suspending and moving both ends of the coating bar 1 up and down, thereby pressing the tip of the coating bar 1, to which adhesive has been applied, against a paper log of sanitary paper. The coating bar 1 is composed of a frame component 111 and a bar component 112 fixed to the frame component 111 and to which a coating member is attached at its tip. The frame component 111 is equipped with a functional part that corrects deformation of the bar component 112 in the direction of gravity.

[0016] In the coating equipment 100 according to this embodiment, the functional part consists of a plurality of adjustment bolt holes 11b1 to 11bn provided at predetermined intervals in the frame component 111, and adjustment bolts Mb1 to Mbn and adjustment bolt nuts 12b1 to 12bn for adjusting the distance between the frame component 111 and the bar component 112 in the direction of gravity, passing through the adjustment bolt holes 11b1 to 11bn. In this embodiment, the adjustment bolt nuts 12b1 to 12bn are fixed to the frame component 111, and the distance between the frame component 111 and the bar component 112 in the direction of gravity is adjusted by pushing the adjustment bolts Mb1 to Mbn into the adjustment bolt nuts 12b1 to 12bn.

[0017] As shown in FIGS. 2(a) and 2(b), the holes 11b1 to 11bn for the adjustment bolts are formed on the lower surface of the frame component 111. In the present embodiment, the nuts 12b1 to 12bn for the adjustment bolts are fixed to the lower surface of the frame component 111 corresponding to the positions of the holes 11b1 to 11bn for the adjustment bolts. The shape of the inner holes of the nuts 12b1 to 12bn for the adjustment bolts corresponds to the thread shape of the adjustment bolts Mb1 to Mbn. By rotating the head portions of the adjustment bolts Mb1 to Mbn clockwise or counterclockwise, the threaded portions of the adjustment bolts Mb1 to Mbn are moved, and the distance in the gravitational direction between the bar component 112 in contact with the tip portions of the threaded portions of the adjustment bolts Mb1 to Mbn (or the head portions of the adjustment bolts Mb1 to Mbn) and the frame component 111 can be increased or decreased.

[0018] The lengths of the frame component 111 and the bar component 112 are designed to correspond to the length of the paper log of the toilet paper roll provided with the tail seal. The positions, number (value of n), and intervals of the holes 11b1 to 11bn for the adjustment bolts of the frame component 111 can be designed in consideration of the magnitude of the deformation of the coating bar 1 in the gravitational direction. The value of n is, for example, 14, and the interval is, for example, 200 mm.

[0019] The material of the bar component 112 is, for example, aluminum, and the material of the frame component 111 is, for example, stainless steel. However, in the present invention, various materials can be used as long as the effects of the present invention are achieved. Also, as the material of the coating member 113 attached to the tip of the bar component 112, for example, synthetic rubber such as NBR (acrylonitrile-butadiene rubber) or resin-made materials can be adopted, but the present invention is not limited thereto.

[0020] The adhesive used for the tail seal is not particularly limited, and it is preferable that the adhesive can be quickly adhered and fixed to the tail portion of the toilet paper roll and has an adhesive strength that does not peel off easily. Such an adhesive can be, for example, a water-soluble adhesive or a cellulose derivative adhesive.

[0021] The user, for example, fits the coating member 113 into the recess 121 of the bar part 112, inserts the bar part 112 into the frame part 111 which is in a horizontal position, aligns the bar part fixing holes 13a1~13an provided on the side of the frame part 111 with the frame part fixing holes 23a1~23an provided on the side of the bar part 112, and attaches the frame-bar connecting bolts Ma1~Man and frame-bar connecting nuts Fa1~Fan. Next, the user, for example, attaches the adjustment bolts Mb1 and Mbn to the adjustment bolt nuts 12b1 and 12bn respectively, adjusts the amount of pressure with the adjustment bolts Mb1 and Mbn, and completely tightens and fixes the frame-bar connecting bolts Ma1 and Man at both ends to the frame-bar connecting nuts Fa1 and Fan at both ends. At this time, it is not necessary to completely tighten or otherwise firmly fix the adjustment bolts Mb1 and Mbn. Furthermore, the "fully tightening and fixing of the frame-bar connecting bolts Ma1 and Man at both ends" only needs to be sufficient to prevent the frame component 111 from falling off the bar component 112. Next, the other frame-bar connecting bolts Ma2~Man-1 and frame-bar connecting nuts Fa2~Fan-1 are connected in a movable state (so-called play state), and then the other adjustment bolts Mb2~Mbn-1 are attached to the other adjustment bolt nuts 12b2~12bn-1 respectively, and the amount of pressure applied to the adjustment bolts Mb2~Mbn-1 is increased in the central part which is easily deflected by gravity, and decreased at both ends which are less easily deflected by gravity, thereby adjusting the amount of pressure applied to the adjustment bolts Mb2~Mbn-1 so that the coating bar 1 becomes flat (see Figure 4(a)), and after this adjustment, the frame-bar connecting bolts Ma2~Man-1 are tightened and fixed to the other frame-bar connecting nuts Fa2~Fan-1. By fully tightening the frame-bar connecting bolts Ma1 and Man at both ends to the frame-bar connecting nuts Fa1 and Fan at both ends, the bar component 112 can be fixed and supported by the bar component fixing holes 13a1 and 13an, and the respective pushing in by the adjustment bolts Mb2 to Mbn-1 is also supported by the bar component fixing holes 13a1 and 13an.Here, since the bar component fixing holes 13a1 to 13an each have a vertically elongated shape compared to the frame component fixing holes 23a1 to 23an, the adjustment bolts Mb1 to Mbn can be pushed in towards the C direction or loosened towards the D direction, respectively. In other words, the frame-bar connecting bolts Ma1 to Man, which are integrally attached to the bar component 112 and are in contact with the tips of the adjustment bolts Mb1 to Mbn, can move in the C direction and the D direction, respectively. In this embodiment, the frame-bar connecting bolts Ma1 to Man, which are integrally attached to the bar component 112, can move in the C direction and the D direction relative to the frame component 111. However, in the present invention, the bar component fixing holes 13a1 to 13an may each have a larger diameter compared to the frame component fixing holes 23a1 to 23an so that they can move in directions that intersect the C direction and the D direction (for example, directions perpendicular to the C direction and the D direction), in addition to the C direction and the D direction. With this configuration, the adjustment bolts Mb1 to Mbn force (or correct) the bar component 112 to become flat, causing the frame to curve. This allows for a lateral displacement of the hole positions of the frame component fixing holes 23a1 to 23an (especially on both sides) relative to the bar component fixing holes 13a1 to 13an. In this embodiment, the bar component fixing holes 13a1 and 13an at both ends of the frame component 111 have a vertically elongated shape, similar to the other holes 13a2 to 13an-1. However, the present invention is not limited to this, and the bar component 112 may have a circular shape similar to the frame component fixing holes 23a1 to 23an, with an inner diameter just large enough for the cylindrical or threaded portion of the frame-bar connecting bolts Ma1 and Man to pass through.This configuration restricts the movement of the frame-bar connecting bolts Ma1 and Man within the bar component fixing holes 13a1 and 13an at both ends of the frame component 111. Therefore, when fixing the bar component fixing holes 13a1 and 13an at both ends of the frame component 111 to the frame component fixing holes 23a1 and 23an of the bar component 112 with the frame-bar connecting bolts Ma1 and Man and the frame-bar connecting nuts Fa1 and Fan, the ends of the frame component 111 and the corresponding parts of the bar component 112 are firmly fixed, making it possible to more reliably adjust the deflection of the bar component 112 using the frame-bar connecting bolts Ma2 to Man-1, the frame-bar connecting nuts Fa2 and Fan-1, and the adjustment bolts Mb2 to Mbn-1. In this embodiment, the center positions of the holes 23a1 and 23an for fixing the frame component of the bar component 112 are configured so that when the bar component 112 is inserted into the frame component 111, the center positions of the holes 13a1 and 13an for fixing the bar component are aligned. However, in the present invention, it is sufficient that the holes are configured so that at least the cylindrical and threaded portions of the frame-bar connecting bolts Ma1 and Man can pass through. For example, the holes 13a1 and 13an for fixing the bar component may be positioned upwards. If the shape is a perfect circle as described above, the center positions of the holes for fixing frame components 23a1 and 23an may be designed to coincide with the center positions of the holes for fixing bar components 13a1 and 13an. Also, if the holes for fixing bar components 13a1 and 13an are elongated as described above, for example, they may be designed so that the inner lower edge of the holes for fixing bar components 13a1 and 13an and the inner lower edge of the holes for fixing frame components 23a1 and 23an are the same. Conversely, a configuration in which there is no adjustment range with the adjustment bolts Mb1 and Mbn, for example, a configuration in which the inner upper edge of the holes for fixing bar components 13a1 and 13an and the inner upper edge of the holes for fixing frame components 23a1 and 23an are the same, is not adopted unless there are special circumstances. Furthermore, the bar component fixing holes 13a1 and 13an may be designed to align with the positions of the frame component fixing holes 23a1 and 23an. These embodiments are also applicable to other frame component fixing holes 23a2 to 23an-1 and other bar component fixing holes 13a2 to 13an-1.

[0022] Next, for example, the user fully fixes the frame-bar connecting bolts Ma2 to Man-1, which were in a movable state, to the frame-bar connecting nuts Fa2 to Fan-1. Subsequently, the user aligns the positions of the holes provided in a pair of hanging member fixing holes 122 provided at both ends of the bar part 112 with the holes provided in a pair of hanging members (not shown, for example, made of stainless steel), and fixes them respectively with bolts and nuts to attach the pair of hanging members to both ends of the bar part 112. By connecting and fixing the cylinder connecting hole provided in the hanging member and the cylinder 2 with an instrument, the coating bar 1 of the coating equipment 100 shown in FIG. 1 is prepared.

[0023] Thereafter, for example, the coating bar 1 is lowered by the cylinders 2 provided at both ends thereof (moved in the B direction in FIG. 1), the coating member provided at the tip of the coating bar 1 is immersed in the glue tank 3, and then the coating bar 1 is raised by the cylinders 2 provided at both ends thereof (moved in the A direction in FIG. 1) to press the coating member with the adhesive attached thereto against the surface of toilet paper (not shown, for example, toilet paper) conveyed from the back side to the front side in FIG. 1 for coating. Then, the toilet paper is wound up to form a tail seal for the toilet paper log. And the paper log with the tail seal formed is cut to a predetermined width dimension (product width of the toilet paper roll), and a toilet paper roll-shaped product is manufactured.

[0024] Adjusting the pushing-in amounts of the adjusting bolts Mb1 to Mbn so that the coating bar 1 becomes flat means, as described above, for example, when inserting the adjusting bolts Mb1 to Mbn into the adjusting bolt nuts 12b1 to 12bn from the lower side of FIG. 2(a), increasing the pushing-in amounts of the adjusting bolts Mb1 to Mbn near the central part of the coating bar 1, which is easily affected by gravity and easily deflects in the direction of gravity, and conversely, decreasing the pushing-in amounts of the adjusting bolts Mb1 to Mbn near both ends of the coating bar 1, which is less affected by gravity and less likely to deflect in the direction of gravity (see FIG. 4(a)).

[0025] Conventionally, various methods have been used to coat roll-shaped sanitary paper products to provide a tail seal. For example, wire coating is lightweight and requires small equipment, but the wire bends when it comes into contact with the roll during coating, making it difficult to achieve uniform coating. Spray coating is prone to problems such as nozzle clogging. As an alternative method, coating with a coating bar can be considered.

[0026] However, even with coating using a coating bar, there was a risk that the coating bar would bend due to gravity, making it difficult to apply the adhesive evenly to the tail seal of sanitary paper roll products. If, hypothetically, a wide metal plate were simply used for the coating bar to suppress bending, both the size and weight of the coating bar would increase, potentially leading to a larger equipment size for installing the coating bar.

[0027] According to this embodiment, by providing a function to adjust the curvature of the coating bar 1, a narrow and lightweight coating bar 1 can be used, which in turn reduces the size of the coating equipment 100. Furthermore, by being able to finely adjust the curvature of the coating bar 1, the application of adhesive in the tail seal can be made more uniform.

[0028] In this embodiment, the leading edge of the coating member 113 extends in a straight line, but the present invention is not limited to this.

[0029] Figure 5 is a diagram illustrating the shape of the tip edge of the coating member 113' according to a modified example of this embodiment.

[0030] In this modified example, the coating member 113' has a thickness similar to the coating member 113 according to the first embodiment, but unlike the coating member 113 according to the first embodiment, it has alternating recessed and convex portions, as shown in Figure 5, the recessed portions have a width d1 and the convex portions have a width d2. The thickness of the coating member 113' is preferably 1 mm to 7 mm, more preferably 2 mm to 5 mm, the width d1 is preferably 3 mm or more, more preferably 5 mm to 10 mm, and the width d2 is preferably 2 mm to 15 mm, more preferably 4 mm to 8 mm. If the thickness of the coating member 113' is less than 1 mm, the amount of coating will decrease, and the adhesion of the tail seal may be insufficient. If the thickness of the coating member 113' is greater than 7 mm, the amount of penetration will increase, making it prone to tearing. Also, if the width d1 is narrower than 3 mm, the adhesive will diffuse and the dots may become integrated or narrower, and if the width d1 is less than 3 mm, the strength may be insufficient and it may tear. On the other hand, if the width d1 is too wide, the tail seal may not adhere properly and may peel off before use, such as during the manufacturing process. Also, the area of ​​one protrusion of the coating member 113' is designed considering the adhesive strength of the tail seal, etc., and is 6 mm 2 ~35mm 2 It is preferable.

[0031] The coating member 113 according to this embodiment and the coating member 113' according to a modified example are configured to be fitted into the recess 121 of the bar part 112. However, the present invention is not limited to this, and a configuration in which the coating member 113 or 113' is sandwiched between plates and fixed to the bar part 112 is also acceptable.

[0032] <Second Embodiment> In the second embodiment of the present invention, unlike the first embodiment, an L-shaped frame component 111' is used to achieve further weight reduction.

[0033] Figure 6 is a schematic diagram showing the frame component 111' of the coating bar according to this embodiment, where Figure 6(a) is a plan view seen from the side, and Figure 6(b) is a cross-sectional view in the direction VIb-VIb of Figure 6(a). Among the elements constituting the frame component 111' according to this embodiment, those having similar functions are denoted by the same reference numerals as in the first embodiment, and their descriptions are omitted.

[0034] According to this embodiment, similar to the first embodiment, the size of the coating equipment 100 can be reduced, and the curvature of the coating bar can be finely adjusted, which makes the application of adhesive to the tail seal more uniform, and further weight reduction of the coating bar can be achieved.

[0035] <Other> The present invention is not limited to the embodiments described above or the modifications mentioned in various places, and can be modified or altered as appropriate without departing from the technical spirit of the present invention.

[0036] For example, the cross-sectional shape of the frame component 111 according to the first embodiment described above is U-shaped, and the cross-sectional shape of the frame component 111' according to the second embodiment described above is L-shaped. However, the present invention is not limited to these, and various shapes can be used for the frame component as long as they achieve the effects of the present invention.

[0037] In addition, in each of the embodiments described above, the gap between the frame component 111 (or 111') and the bar component 112 in the direction of gravity is adjusted by rotating the adjustment bolts Mb1 to Mbn within the adjustment bolt holes 11b1 to 11bn and moving them within the adjustment bolt nuts 12b1 to 12bn. However, in the present invention, a hole may be provided on the lower surface of the bar component 112 (in Figure 3(a)) at a position corresponding to the adjustment bolt holes 11b1 to 11bn of the frame component 111 (or 111'), into which the adjustment bolts Mb1 to Mbn can be inserted and fixed while rotating, thereby adjusting the gap between the frame component 111 (or 111') and the bar component 112 in the direction of gravity.

[0038] Furthermore, in each of the embodiments described above, the deformation of the coating bar 1 in the direction of gravity is corrected by the adjustment bolt holes 11b1 to 11bn, the adjustment bolts Mb1 to Mbn, and the adjustment bolt nuts 12b1 to 12bn. However, the present invention is not limited to this, and various configurations can be adopted as long as they adjust the gap between the frame component 111 (or 111') and the bar component 112 in the direction of gravity. [Explanation of Symbols]

[0039] 100 Coating equipment 1 Coating bar 111, 111' Frame parts 11b1~11bn Holes for adjustment bolts 12b1~12bn Adjustment bolt nuts 13a1~13an Holes for fixing bar parts 112 bar parts 121 Recess 122 Hanging member fixing hole 23a1~23an Holes for fixing frame components 113, 113' Coating member d1 Width of the recess d2 Width of the convex portion Ma1~Man Frame / Bar Connecting Bolts Fa1~Fan Frame / Bar Connecting Nut Mb1~Mbn Adjustment Bolts 2 cylinders 3. Glue tank

Claims

1. A coating apparatus for creating a tail seal by suspending and moving both ends of the coating bar up and down, thereby pressing the adhesive-coated tip of the coating bar against a paper log of sanitary paper, The coating bar comprises a frame component and a bar component fixed to the frame component and having a coating member attached to its tip. The coating equipment is characterized in that the frame component includes a functional part that corrects the deformation of the bar component in the direction of gravity.

2. The coating equipment according to claim 1, characterized in that the functional part comprises a plurality of adjustment bolt holes provided at predetermined intervals in the frame component, and adjustment bolts and nuts for adjustment bolts that pass through the adjustment bolt holes to adjust the distance between the frame component and the bar component in the direction of gravity.

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