JP2024071036A - Foreign matter removal device and method - Google Patents

Abstract

[Problem] To provide a foreign matter removal device that suppresses the peeling of the tail seal when blowing gas onto a rolled product to remove foreign matter adhering to the peripheral surface. [Solution] The foreign matter removal device 100 is a foreign matter removal device for a rolled product R in which a long sheet is wound, and includes a rope conveyor 40 that transports the rolled product R in the axial direction, and a blower 10 that blows gas onto the rolled product R from one or more directions along the winding direction of the sheet while the rolled product R is supported by the rope conveyor 40. [Selected Figure] Figure 2

Description

The present invention relates to a foreign matter removal device and method for rolled products. Specifically, the present invention relates to a technology for blowing gas onto a rolled product to remove foreign matter adhering to its peripheral surface.

Conventionally, in order to maintain the quality of rolled products made by winding long sheets such as toilet rolls and kitchen rolls, it has been common to remove foreign matter such as paper powder and dust that adheres to the peripheral surface during the manufacturing process. For example, Patent Document 1 discloses a process in which a gas injection means is provided in the transport path of the rolled product, and gas is blown onto the peripheral surface of the rotating rolled product to remove foreign matter.

JP 2009-186193 A

Generally, rolled products are made by gluing one end of a long sheet to the periphery of a cylindrical core, wrapping the sheet around the core in multiple layers in the circumferential direction, and finally gluing the other end of the sheet to the outermost layer (also called tail seal). If poor adhesion or peeling occurs in the tail seal during the manufacturing process of a rolled product, the rolled product is deemed unsuitable for sale and is treated as a defective product.

Looking at FIG. 1 of Patent Document 1, it can be seen that when gas is blown from the gas injection means onto the rolled product, the gas is blown in a direction opposite to the winding direction of the sheet of the rolled product. In other words, the direction in which the tip of the tail seal side of the rolled product faces and the direction in which the gas is injected are opposite to each other. If such a configuration is adopted, there is a possibility that the tail seal of the rolled product may be peeled off by the gas injected from the gas injection means in the process of removing foreign matter from the rolled product, resulting in the problem of defective products. In particular, Patent Document 1 blows gas onto the rolled product while rotating it, but since the rotation direction of the rolled product and the injection direction of the gas are opposite, the problem of the tail seal being peeled off by the injected gas becomes more pronounced. For this reason, in the configuration of Patent Document 1, it is necessary to weaken the wind speed of the gas blown onto the rolled product in order to suppress the peeling off of the tail seal, which results in a decrease in the foreign matter removal ability.

The main objective of the present invention is to prevent the tail seal from peeling off during the process of blowing gas onto a rolled product to remove foreign matter adhering to the peripheral surface.

After extensive research into solutions to the problems of the prior art, the inventors of the present invention discovered that by blowing gas along the winding direction of the rolled product, it is possible to effectively remove foreign matter adhering to the peripheral surface of the rolled product while suppressing peeling of the tail seal of the rolled product. Based on the above findings, the inventors came to the conclusion that the problems of the prior art can be solved, and thus completed the present invention. More specifically, the present invention has the following configuration or steps.

The first aspect of the present invention relates to a foreign matter removal device for rolled products. A rolled product is a long sheet wound in a certain direction over multiple layers. The rolled product may have a cylindrical core material or may not have a core material. The foreign matter removal device according to the present invention is equipped with a blower. This blower is configured to blow gas onto the rolled product from one or more directions along the winding direction of the sheets constituting the rolled product. The winding direction of the sheet (or the winding direction of the rolled product) means the winding direction when the sheet is wound in multiple layers from the starting end to the ending end, when the tip of the sheet on the innermost layer side of the rolled product is the starting end and the tip of the sheet on the outermost layer side is the ending end. In this way, by blowing gas from the blower along the winding direction of the sheet (i.e., the forward direction), it is possible to suppress the occurrence of a situation in which the adhesion (tail seal) at the end of the sheet is peeled off due to the wind pressure of the gas. Therefore, it is possible to maximize the wind speed of the gas output from the blower, and as a result, it is possible to effectively remove foreign matter attached to the peripheral surface of the rolled product.

The foreign matter removal device according to the first aspect of the present invention further includes a rope conveyor that transports the rolled product in the axial direction, and the blower blows gas onto the rolled product from one or more directions along the winding direction of the sheet while the rolled product is supported by the rope conveyor. The axial direction of the rolled product is the direction perpendicular to the end face of the rolled product, or in other words, the extension direction of the center hole of the rolled product. With this configuration, the rolled products can be transported one by one by the rope conveyor while being spaced apart, so that foreign matter attached to not only the circumferential surface of the rolled product but also the end surface can be removed. In addition, the foreign matter removal device according to the first aspect of the present invention is configured such that the blower can blow gas onto the rolled product while at least the lowest point of the rolled product is lifted from the transport surface of the transport device by the rope conveyor. Under normal conditions, the lowest point of the rolled product is in contact with the transport surface of a conveyor or the like, but by blowing gas while this lowest point is lifted from the transport surface, the foreign matter removal effect can be enhanced.

The blower included in the foreign matter removal device according to the first aspect of the present invention is preferably formed in a cylindrical shape capable of blowing gas from multiple directions along the winding direction of the sheet against the rolled product placed therein. By adopting such a configuration, the configuration of the blower can be made compact, and by increasing the number of holes from which gas is blown out, it becomes easier to blow gas over the entire peripheral surface of the rolled product.

The foreign matter removal device according to the second aspect of the present invention is a foreign matter removal facility for a roll-shaped product in which a long sheet is wound, and includes a conveying device that conveys the roll-shaped product in the axial direction, and a cylindrical air blowing device that can blow gas from multiple directions along the winding direction of the sheet against the roll-shaped product placed therein, causing the roll-shaped product to float in midair. The conveying device has a first driving area in which the roll-shaped product is conveyed by a conveyor, a non-driving area that does not have a conveyor, and a second driving area that is provided downstream of the non-driving area and conveys the roll-shaped product by a conveyor. The air blowing device is installed in the non-driving area, and the conveying device is configured to transmit the conveying force of the conveyor in the first driving area through the subsequent roll-shaped product, thereby moving the roll-shaped product into the cylindrical air blowing device downstream of the first driving area, and guiding it to the conveyor in the second driving area further downstream. Here, the driving area is the area where the rolled product is transported by the conveyor, and the non-driving area is the area located downstream of the driving area where the conveying force of the conveyor is not "directly" transmitted to the rolled product (i.e., it is not denied that it may be "indirectly" transmitted). The blower included in the foreign matter removal device according to the second aspect of the present invention blows gas onto the rolled product in the non-driving area. With this configuration, there is no need to provide a separate driving means for the blower, so that foreign matter adhering to the peripheral surface of the rolled product can be removed at low cost.

In the foreign matter removal device according to the first or second aspect of the present invention, it is preferable that the air blowing device blows gas from the downstream side to the upstream side of the conveying direction of the rolled product. In this way, by blowing gas in the direction opposite to the conveying direction of the rolled product, the foreign matter removal effect can be enhanced. In addition, by blowing gas from the downstream side to the upstream side of the conveying path, it is possible to prevent the re-adhesion of foreign matter that has detached from the rolled product. In the present invention, it is also possible to provide a separate suction device on the upstream side within the foreign matter removal device or on the upstream side of the foreign matter removal device. This is even better because the blown-off foreign matter can be sucked in to prevent it from re-adhering to the rolled product.

In the foreign matter removal device according to the first or second aspect of the present invention, it is preferable that the inner peripheral surface of the cylindrical blower is provided with a plurality of holes around the entire circumference, through which gas can be blown toward the rolled product. With this configuration, it becomes possible to blow gas onto the entire peripheral surface of the rolled product (or the entire surface including the peripheral surface and end surfaces) at once. In addition, since the rolled product can be more stably suspended in midair inside the cylindrical blower, it becomes possible to more reliably transport the rolled product and remove foreign matter inside the cylindrical blower.

The third aspect of the present invention relates to a method for removing foreign matter from a roll-shaped product in which a long sheet is wound. In the method for removing foreign matter according to the third aspect of the present invention, a blower included in the foreign matter removal equipment according to the first or second aspect of the present invention is used to blow gas onto the roll-shaped product from one or more directions along the winding direction of the sheet.

According to the present invention, it is possible to prevent the tail seal from peeling off during the process of blowing gas onto the rolled product to remove foreign matter adhering to the peripheral surface.

Figure 1 shows the overall flow from the production of rolled products to packaging. FIG. 2 is a side view showing a schematic diagram of the first embodiment of the foreign matter removal device. FIG. 3 is a schematic cross-sectional view of the air blower included in the foreign matter removal device according to the first embodiment. FIG. 4 is a side view showing a schematic diagram of a foreign matter removal device according to a second embodiment of the present invention. FIG. 5 is a schematic cross-sectional view of a blower included in a foreign matter removal device according to the second embodiment. FIG. 6 shows an example of a blower included in the foreign matter removal device. FIG. 7 shows an example of a straightening member included in the air blower. FIG. 8 is a schematic cross-sectional view of the blower shown in FIG. FIG. 9 is a schematic cross-sectional view of a modified example of the blower device. FIG. 10 is a side view showing a schematic diagram of the third embodiment of the foreign matter removal device.

Below, the embodiments for carrying out the present invention will be explained using the drawings. The present invention is not limited to the embodiments described below, and includes appropriate modifications of the embodiments below within the scope obvious to those skilled in the art.

Figure 1 shows the flow from manufacturing a rolled product R to boxing. Examples of rolled products include, but are not limited to, toilet rolls and kitchen rolls. As shown in Figure 1, in the rewinding process (step S1), a long and wide base paper is unwound from a raw roll and wound around a paper tube to form a cylindrical log. The log has a shape in which multiple rolled products R to be finally manufactured are connected in the axial direction. Therefore, at this stage, the diameter of the log and the diameter of the rolled product R are the same. The obtained log is sent to the cutting process (step S3) after the adjustment process (step S2). In the cutting process (step S3), the log is cut to a predetermined length by a log saw. As a result, multiple rolled products R are obtained from one log. The obtained multiple rolled products R are transported to a packaging device by a conveyor transport process (step S4). In this transport process (step S4), a foreign matter removal process is performed on the rolled product R as described below. That is, gas is blown onto multiple rolled products R while they are being transported, removing foreign matter (such as paper powder and dust) adhering to their peripheral surfaces. Then, in the packaging process (step S5), multiple rolled products R are packed into bags in vinyl film or the like by a packaging device in groups. The packages of rolled products R obtained by the packaging device are sent to the boxing process (step S6), where multiple products are packed together in a packaging box by the boxing device. This packaging box is then transported to a product warehouse and stored until shipment.

First Embodiment
FIG. 2 shows a first embodiment of the foreign matter removal device 100. As described above, the foreign matter removal device 100 is preferably disposed in the transport process (step S4) of the rolled product R. In this embodiment, the foreign matter removal device 100 includes a plurality of air blowers 10, a plurality of conveyors 20 for transport, and a rope conveyor 40 for transport provided between the two conveyors 20. The conveyor 20 and the rope conveyor 40 constitute a transport device for the rolled product R. The rolled product R is transported by four rope conveyors 40, and the lowest point of the rolled product R is in a floating state (see the cross-sectional view seen from the downstream side indicated in the lower left frame of FIG. 2, and in the second embodiment described later, see the same cross-sectional view in the lower left frame of FIG. 4. In FIG. 2, the symbol F indicates a cross-section of the rope portion of the rope conveyor 40 that moves (towards) the downstream, and the symbol B indicates a cross-section of the rope portion of the rope conveyor 40 that moves (returns) upstream. The same applies to FIG. 4 described later). With this configuration, the lowest point of the rolled product R is normally in contact with the conveying surface such as the conveyor 20, but by blowing gas onto the lowest point in a state where it is raised above the conveying surface, the effect of removing foreign matter can be enhanced. However, in the present invention, a configuration in which the lowest point of the rolled product R is not raised by the conveyance by the rope conveyor 40 is also acceptable.

As shown in FIG. 2, each rolled product R is a cylindrical product made of a long sheet wound in multiple layers, and the multiple rolled products R are intermittently transported one by one along their axial direction by a transport device. Gas (mainly air) is blown onto each rolled product R by multiple blowing devices 10 during transport, removing foreign matter attached to not only the circumferential surface but also the end surface. In this embodiment, the rolled product R is transported intermittently, but the present invention also allows a configuration in which multiple rolled products R are transported continuously so that they abut against each other (so that there are no gaps) and gas is blown onto the circumferential surface of the rolled product R.

Figure 3 shows a schematic cross-sectional shape of the rolled product R and the direction of gas injection from each blower 10. In each figure, the direction of gas injection from the blower 10 is indicated by an outlined arrow. As shown in Figure 3, the rolled product R is, for example, a long paper sheet S wound in multiple layers around the periphery of a cylindrical core material C, and the rolled state of the sheet S is maintained by an adhesive (tail seal TS) applied to the end of the sheet S. Note that the core material C is not essential for the rolled product R, and the product may be one without the core material C. In Figure 3, the winding direction of the sheet S of the rolled product R is indicated by an arrow, and in the illustrated example, it is clockwise.

Here, a total of four blowers 10 are provided around the rolled product R at equal intervals (90 degree intervals), and gas is sprayed from each blower 10 toward the circumferential surface of the rolled product R while the rolled product R is supported by the rope conveyor 40. The number of blowers 10 may be only one, but it is preferable to have multiple blowers, for example, two or three, or four or more. When multiple blowers 10 are arranged, they are preferably arranged around the rolled product R at intervals of 360 degrees/N units (the number of blowers). At this time, gas is sprayed from all blowers 10 in the direction (forward direction) along the winding direction of the rolled product R. In other words, when the winding direction of the rolled product R is clockwise, the direction of gas spray from each blower 10 is also clockwise. More specifically, in a cross-sectional view such as that shown in FIG. 3, the straight line indicating the direction of gas injection from the blower 10 is inclined at a predetermined angle θ1 toward the winding direction of the rolled product R with respect to the straight line connecting the center of the rolled product R and the gas injection port of the blower 10 in the radial direction of the rolled product R. The angle θ1 indicating the inclination of the gas injection direction is preferably, for example, 5 to 60 degrees, and particularly preferably 15 to 50 degrees or 30 to 45 degrees. In addition, in the present invention, the relative arrangement of the blower 10 and the rope conveyor 40 can be designed so that foreign matter attached to the rolled product R can be effectively removed by the gas from the blower 10 (for example, the blower port of the blower 10 can be arranged to avoid the rope conveyor 40, or the rope conveyor 40 can be arranged to avoid the blower port of the blower 10).

In this way, by blowing gas from each blower 10 along the winding direction of the rolled product R, it is possible to prevent the tail seal TS of the rolled product R from peeling off due to the wind pressure of the gas. This makes it possible to increase the wind pressure (wind speed) output from the blower 10, making it possible to efficiently remove foreign matter.

As shown in FIG. 2, the conveying device for the rolled product R is divided into two first driving areas in which the conveyor 20 is arranged, and a second driving area located between the two first driving areas and in which the rope conveyor 40 is arranged. The conveyor 20 and the rope conveyor 40 in the two first driving areas transmit a conveying force to the rolled product R and convey the rolled product R toward the downstream side of the device. In the description of the present invention, when the term "conveyor" is used, it refers to a normal conveyor, for example, a belt conveyor, but does not exclude conveyors such as a rope conveyor. In other words, in the present invention, the two first driving areas and the second driving area may be connected by a pair of rope conveyors. In this embodiment, four rope conveyors 40 are installed so as to surround all four sides of the peripheral surface of the rolled product R transported in the axial direction. In the present invention, four or more rope conveyors 40 may be installed. Two or three rope conveyors 40 (two or three lines) are possible, but four or more are preferable for transport stability.

When the foreign matter removal device 100 is viewed from the side as shown in FIG. 2, it is preferable that each blower device 10 is configured to inject (blow) gas from the downstream side to the upstream side in the conveying direction of the rolled product R. In other words, the blower device 10 injects gas in the opposite direction to the conveying direction of the rolled product R. By configuring the blower device 10 in this way, it is possible to prevent foreign matter that has been removed from the rolled product R from reattaching to the same rolled product R.

In the foreign matter removal device 100 according to the present invention, it is preferable that the blower device 10 blows gas onto the rolled product from multiple directions along the winding direction of the sheet. By blowing gas onto the rolled product R from multiple directions, it becomes possible to apply gas to, for example, the entire peripheral surface or end surface of the rolled product R at once.

Second Embodiment
4 shows a second embodiment of the foreign matter removal device 100. In the second and subsequent embodiments, the same configuration as in the first embodiment described above will not be described, and the different configuration will be mainly described. In the second embodiment, instead of a configuration in which a plurality of blowing devices 10 are arranged around the rolled product R, a configuration in which one cylindrical blowing device 10 through which the rolled product R can pass is arranged is adopted. By adopting such a configuration, the configuration of the blowing device can be made compact, and by increasing the number of holes from which gas is blown out, it is easy to blow gas over the entire rolled product R, including the circumferential surface and end surfaces, that is, to perform an air shower by passing the rolled product R through the cylinder.

A cylindrical blower 10 is arranged in the second driving area, and one side of each of the four rope conveyors 40 passes through the cylindrical shape (see FIG. 5, etc.). The cylindrical shape means that a passage through which the rolled product R can pass is provided, and it does not matter whether the shape is a cylindrical, square, or other polygonal tube. FIG. 5 shows a schematic cross-sectional structure of the blower 10 and the rolled product R. As shown in FIG. 5, the blower 10 of this embodiment includes a gas ejection means 11, a conduit 12, and a straightening member 13. The gas ejection means 11 supplies gas into the conduit 12. The conduit 12 has an inlet 12a connected to the gas ejection means 11 and a flow path 12b for the gas flowing in from the inlet 12a. The straightening member 13 is a cylindrical (specifically, cylindrical) member and is arranged in the conduit 12. The straightening member 13 has a plurality of holes 13a formed therein, and the gas flowing through the flow passage 12b of the conduit 12 is discharged from the holes 13a of the straightening member 13. The gas injection direction of each hole 13a is set so that the gas is blown onto the peripheral surface of the rolled product R along the winding direction of the sheet S. That is, the straight line indicating the gas injection direction from the holes 13a of the straightening member 13 is inclined at a predetermined angle θ1 toward the winding direction of the rolled product R with respect to the straight line connecting the center of the rolled product R and the gas injection port of the blower 10 in the radial direction of the rolled product R. The angle θ1 indicating the inclination of the gas injection direction is preferably, for example, 5 to 60 degrees, and particularly preferably 15 to 50 degrees or 30 to 45 degrees.

Figures 6 to 8 show a specific example of the blower 10 outlined with reference to Figure 5. Figure 6(a) is a perspective view showing the blower 10 (the gas ejection means 11 and the other side of the rope conveyor 40 located outside the blower 10 are omitted), the rolled product R passing through it, and the rope conveyor 40 supporting the rolled product R. Figure 6(b) shows the blower 10 and the like as viewed from the front. As shown in these figures, the rolled product R is supported by four rope conveyors 40 and passes through the inside of the conduit 12 and the straightening member 13 of the blower 10, which are formed in a substantially cylindrical shape, while being transported by the rope conveyor 40. At that time, foreign matter attached to the rolled product R is removed by the gas ejected from the hole 13a of the straightening member 13.

Figure 7(a) is a perspective view showing the straightening member 13, and Figure 7(b) is a cross-sectional view of the part of the straightening member 13 where the hole 13a is formed. As shown in these figures, the straightening member 13 includes a ring-shaped part 13b in which a plurality of holes 13a are formed, and a flange part 13c provided on the edge of this ring-shaped part 13b. The ring-shaped part 13b has a certain thickness (for example, 5 mm to 100 mm), and the hole 13a formed therein has a straight line connecting its inlet and outlet (dashed line in Figure 7(b)) inclined at an angle θ1 with respect to a straight line extending in the diameter direction of the ring-shaped part 13b (dotted line in Figure 7(b)). In this way, by forming an inclination in the extension direction of the hole 13a, the injection direction of the gas from the hole 13a is controlled. For example, the inclination angle θ1 of the hole 13a is preferably 5 to 60 degrees, and particularly preferably 15 to 50 degrees or 30 to 45 degrees.

In addition, in FIG. 7(b), the angle between the straight line connecting the inlet and outlet of a certain hole 13a and the straight line connecting the inlet and outlet of another hole 13a adjacent in the circumferential direction is indicated by the symbol θ2. When the number of holes 13a provided in the circumferential direction of the ring-shaped portion 13b is N, the angle θ2 is preferably set to ±10 degrees of 360 degrees/N. For example, in the example shown in FIG. 7, N=20, so 360 degrees/N is 18 degrees, and the allowable range is 8 degrees to 28 degrees. In this way, by arranging the holes 13a at equal intervals all over the circumferential direction of the ring-shaped portion 13b, it is possible to uniformly blow gas onto the entire circumferential surface of the rolled product R passing through it. In the present invention, as described in the first embodiment, the relative arrangement of the holes 13a of the blower 10 and the rope conveyor 40 can be designed so that foreign matter attached to the rolled product R can be successfully removed by the gas from the holes 13a of the blower 10.

In view of the above, in this embodiment, as shown in Figures 7(a) and 7(b), a plurality of holes 13a (a plurality of blowing ports 12c in the modified example described below) capable of blowing gas toward the rolled product are provided around the entire circumference of the inner peripheral surface of the cylindrical blower 10 (the inner peripheral surface of the straightening member 13, and in the modified example described below, the inner peripheral surface of the conduit 12 as shown in Figure 9). With this configuration, the rolled product R can be more stably suspended in midair inside the cylindrical blower 10, so that the rolled product R can be more reliably transported and foreign matter removed inside the cylindrical blower 10.

Figure 8 shows a schematic cross-sectional view of the rolled product R, the blower 10, and the rope conveyor 40 in the conveying direction. As shown in Figure 8, the flange portion 13c of the flow straightening member 13 is fitted into the tip side of the conduit 12, so that the flow straightening member 13 and the conduit 12 are fitted together. When the flow straightening member 13 and the conduit 12 are fitted together, the gas supplied to the inlet 12a of the conduit 12 passes through the flow path 12b and is discharged only from the hole 13a of the flow straightening member 13.

Figure 9 shows a modified example of the blower 10 shown in Figure 8. The blower 10 may include the conduit 12 and not have the straightening member 13. In the example of Figure 8, the blower 10 combines the conduit 12 and the straightening member 13 to form a gas flow path, but in the example of Figure 9, the straightening member 13 is omitted and instead, a gas outlet 12c is provided in the conduit 12. In other words, the conduit 12 is formed in a cylindrical shape that allows the rolled product R to pass along its axial direction, and is configured to include a gas flow path and an outlet 12c for controlling the direction in which the gas flowing into the flow path is blown toward the rolled product R. In other words, in the example of Figure 9, the gas supplied to the inlet 12a of the conduit 12 passes through the flow path 12b and is discharged from the outlet 12c. The outlet 12c is adjusted so that the gas is blown along the winding direction of the sheet S of the rolled product R. In addition, the air outlets 12c are adjusted to blow gas in the direction opposite to the conveying direction of the rolled product R. With this configuration, the configuration of the air blower 10 can be made compact, similar to the air blower 10 shown in FIG. 8, and by increasing the number of air outlets 12c, it becomes easier to blow gas over the entire peripheral surface of the rolled product R.

Third Embodiment
10 shows a third embodiment of the foreign matter removal device 100. In the third and subsequent embodiments, the same configuration as in the second embodiment will not be described, and the different configuration will be mainly described. In the third embodiment, the rolled products R are continuously transported on the conveyor 20, and the conveying force of the conveyor 20 acts on the subsequent rolled products R, and the force of the conveyor 20 pushes the previous rolled products R downstream, passing them through the downstream cylindrical blower 10 to remove foreign matters, and then leading them to the conveyor 20 further downstream. Specifically, the configuration is such that the rope conveyor 40 is removed from the foreign matter removal device 100 according to the second embodiment.

More specifically, the foreign matter removal equipment 100 according to this embodiment includes a cylindrical air blower 10 capable of blowing gas from multiple directions along the winding direction of the sheet against the rolled product R placed therein, thereby floating the rolled product R in midair. The transport device has a first driving area in which the rolled product R is transported by a conveyor 20, a non-driving area without a conveyor, and a second driving area downstream of the non-driving area in which the rolled product R is transported by the conveyor 20. The air blower 10 is installed in the non-driving area, and the transport device is configured to move the rolled product R into the cylindrical air blower 10 downstream of the first driving area by transmitting the transport force of the conveyor 20 in the first driving area through the subsequent rolled product (for example, by allowing inertial force to act on itself), and to guide the rolled product R to the conveyor 20 in the second driving area further downstream. In this specification, the area where the conveying force of the conveyor 20 is transmitted to the rolled product R is referred to as the driven area, and the area where the conveying force of the conveyor 20 is not "directly" transmitted to the rolled product R is referred to as the non-driven area.

According to this embodiment, as in the second embodiment, in the process of blowing gas onto the rolled product R to remove foreign matter adhering to the circumferential surface, in addition to the effect of being able to suppress peeling of the tail seal, since there is no need to provide a separate driving means in the blower 10, it is possible to remove foreign matter adhering to the rolled product R at low cost. In addition, the configuration of the blower 10 can be made compact, and by increasing the number of holes from which gas is blown out, it becomes easy to blow gas onto the entire circumferential surface of the rolled product R, that is, to perform an air shower all around the circumference of the cylinder while floating the rolled product R in the air using only air pressure.

In the above, in order to express the contents of the present invention, the present specification has described an embodiment of the present invention with reference to the drawings. However, the present invention is not limited to the above embodiment, and includes modifications and improvements that are obvious to a person skilled in the art based on the matters described in the present specification.

The present invention relates to a foreign matter removal device and a foreign matter removal method for rolled products. Therefore, the present invention can be suitably used in the manufacturing industry of rolled products such as toilet rolls and kitchen rolls. Of course, it can be used regardless of the number of plies of the rolled product.

REFERENCE SIGNS LIST 10: Blower device 11: Gas ejection means 12: Conduit 12a: Inlet 12b: Flow path 12c: Outlet 13: Flow straightener 13a: Hole 13b: Ring-shaped portion 13c: Flange portion 20: Conveyor 40: Rope conveyor 50: Guide plate 51: Parallel portion 52: Inclined portion 100: Foreign matter removal device R: Rolled product C: Core material S: Sheet TS: Tail seal

Claims (6)

A foreign object removal equipment for a roll-shaped product in which a long sheet is wound,
A rope conveyor that conveys the rolled product in an axial direction;
A foreign matter removal equipment comprising an air blower that blows gas onto the rolled product from one or more directions along the winding direction of the sheet while the rolled product is supported by the rope conveyor. The foreign matter removal equipment according to claim 1 , wherein the air blowing device is formed in a cylindrical shape capable of blowing gas onto the rolled product placed therein from a plurality of directions along the winding direction of the sheet. A foreign object removal equipment for a roll-shaped product in which a long sheet is wound,
A conveying device that conveys the roll-shaped product in an axial direction;
a blower device formed in a cylindrical shape capable of blowing gas from a plurality of directions along the winding direction of the sheet against the rolled product placed therein, thereby floating the rolled product in midair;
The conveying device has a first driving area in which the roll-shaped product is conveyed by a conveyor, a non-driving area having no conveyor, and a second driving area provided downstream of the non-driving area in which the roll-shaped product is conveyed by a conveyor,
The blower is installed in the non-driving area,
The conveying device is configured to transmit the conveying force of the conveyor in the first driving area through the subsequent rolled product, thereby moving the rolled product into the cylindrical blower device downstream of the first driving area, and then guiding it to the conveyor in the second driving area further downstream. Foreign matter removal equipment. The foreign matter removal equipment according to claim 1 , wherein the air blower blows gas from a downstream side to an upstream side in a conveying direction of the rolled product. The foreign matter removal equipment according to any one of claims 1 to 3, wherein the cylindrical blower device has an inner peripheral surface provided with a plurality of holes around the entire circumference, capable of blowing gas toward the rolled product. A method for removing foreign matter from a roll-shaped product in which a long sheet is wound, comprising the steps of:
A foreign matter removal method, comprising: blowing gas onto the rolled product from one or more directions along a winding direction of the sheet, using the foreign matter removal equipment according to any one of claims 1 to 3.

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