Raw material roll mounting system, raw material roll mounting method, and method for manufacturing sheet processed products

Abstract

To provide a rolled web roll fitting system, a rolled web roll fitting method, and a manufacturing method of a sheet product, which are capable of fitting the rolled web roll to a roll holder shaft without complicating control, and downsizing and commonalizing a rolled roll fitting hand.SOLUTION: A rolled web roll attachment system according to the present invention includes: a rolled web roll fitting hand 30; a working robot; and a cylindrical member 40. The rolled web roll fitting hand 30 includes: a rod-shaped member 32 that can be inserted into a core pipe RP of a rolled web roll RA; a pusher device 35; and a drive device 37. The working robot moves the rolled web roll RA into which the rod-shaped member 32 is inserted, and inserts a roll holder shaft 11A into the core pipe RP. The cylindrical member 40 has a flange part 42 that can come into contact with a pressing member 36 of the pusher device 35 when the rod-shaped member 32 is inserted. An inner diameter of a second open end 41b of a cylindrical body part 41 is larger than the inner diameter of the core pipe RP of the rolled web roll RA.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a raw roll mounting system, a raw roll mounting method using the same, and a method for manufacturing a sheet processed product.

Background Art

[0002] Conventionally, when performing various processes on a sheet such as a non-woven fabric, a method of continuously feeding out the sheet from a raw roll around which the sheet is wound and supplying it to a processing apparatus or the like has been adopted. As such a system for continuously feeding out the sheet, for example, a system configured to perform a so-called splicing operation when the remaining amount of the sheet on the raw roll decreases is known.

[0003] Generally, such a splicing operation is performed when the remaining amount of the sheet on the raw roll being fed out (hereinafter referred to as the "feeding-side raw roll") decreases. (1) The end of the sheet is pulled out from the next raw roll (hereinafter referred to as the "waiting-side raw roll"). (2) The end of the sheet of the waiting-side raw roll that has been pulled out (hereinafter referred to as the "splicing end") is connected to the middle part of the sheet of the feeding-side raw roll with an adhesive material such as tape or heat sealing. (3) On the feeding-side raw roll, the upstream side of the connection part to which the waiting-side raw roll is connected is cut. This is done according to the following procedure.

[0004] According to such a system, when the remaining amount of the sheet on the feeding-side raw roll decreases, the system is configured to automatically splice the sheet of the waiting-side raw roll. Therefore, the sheet can be supplied to the processing apparatus or the like without interruption. As a result, it is possible to improve the production efficiency.

[0005] By the way, even in a system that performs such a splicing operation, when the remaining amount of the sheet on the raw roll decreases, an operation of attaching a new raw roll to the roll holding shaft of a device for feeding out the sheet (hereinafter referred to as the "sheet feeding device") (hereinafter referred to as the "raw roll attachment operation") occurs. Generally, since the raw roll is a heavy object, when the operator performs it manually, the raw roll attachment operation tends to be difficult. Therefore, various technologies have been proposed for mechanically performing this raw material roll mounting work. Examples of such technologies include those described in Patent Documents 1 and 2.

[0006] The technology described in Patent Document 1 comprises a working robot having an arm, and a mandrel provided at the tip of the arm to hold a roll of raw material. The tip of the mandrel is provided with a plurality of mandrel arms that can be coupled with a plurality of mandrel arms formed at the tip of a roll-holding shaft. With this technology, while the roll of raw material is held by the mandrel, the mandrel arms on the mandrel side can be coupled with the mandrel arms on the roll-holding shaft side to set the roll of raw material into a sheet feeding device.

[0007] The technology described in Patent Document 2 comprises a work robot having an arm, a transfer-side holding unit attached to the tip of the arm for holding a raw material roll, and a pusher for pushing out the raw material roll held by the transfer-side holding unit and removing the raw material roll from the transfer-side holding unit. With this technology, after inserting the core tube of the raw material roll held by the transfer-side holding unit into the roll holding shaft, the raw material roll can be set into a sheet dispensing device by operating the pusher. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] U.S. Patent Application Publication No. 2016 / 0060061 [Patent Document 2] International Publication No. 2017 / 221746 [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] However, the technology described in Patent Document 1 requires adjusting the insertion angle of the mandrel arm on the mandrel side and then engaging it with the mandrel arm on the roll holding shaft side when setting the raw material roll held by the mandrel into the sheet feeding device. For this reason, the technology described in Patent Document 1 requires high-precision movement of the arms, resulting in a problem of complex control.

[0010] On the other hand, the technology described in Patent Document 2 is configured to set the raw material roll on the roll holding shaft solely by a pushing motion using a pusher. For this reason, the technology described in Patent Document 2 requires a pusher capable of pushing the raw material roll a relatively long distance. Generally, as the pushing distance of the pusher increases, the entire device tends to become larger and heavier. As a result, the weight of the device including the pusher attached to the end of the arm of the work robot (hereinafter referred to as the "raw material roll attachment hand") inevitably tends to increase.

[0011] In other words, the technology described in Patent Document 2 has the problem that the weight of the raw material roll attachment hand accounts for a large proportion of the total payload capacity of the work robot, which unnecessarily limits the weight of the raw material roll that can be attached to the raw material roll attachment hand.

[0012] Furthermore, in the technology described in Patent Document 2, the attachment of the raw material roll to the roll holding shaft depends on a pushing action by a pusher. Therefore, if the roll width of the raw material roll differs, or if the pushing distance of the raw material roll by the pusher changes, it may be impossible to attach the raw material roll to the correct position on the roll holding shaft. In such cases, the technology described in Patent Document 2 presents the problem of having to prepare a separate raw material roll attachment handle that corresponds to the pushing distance of the raw material roll.

[0013] Thus, the technologies described in Patent Documents 1 and 2 are not sufficient as technologies for attaching raw material rolls to a sheet holding shaft, and there is still room for improvement.

[0014] The present invention relates to providing a raw material roll mounting system, a raw material roll mounting method using the same, and a method for manufacturing sheet processed products that can overcome the drawbacks of the conventional technology described above. [Means for solving the problem]

[0015] The present invention relates to a raw material roll mounting system comprising a work device for attaching a raw material roll to a roll holding shaft that rotatably supports the raw material roll. The raw material roll mounting system preferably comprises: a raw material roll holding means having a rod-shaped member that can be inserted into the core tube of the raw material roll; a pressing member that presses the raw material roll, in which the rod-shaped member is inserted into the core tube, in a detachment direction to detach it from the rod-shaped member; and a drive device that moves the pressing member in the detachment direction; a moving means connected to the raw material roll holding means, which moves the raw material roll, in which the rod-shaped member is inserted into the core tube, and inserts the roll holding shaft into the core tube; a cylindrical body portion having a first open end into which the rod-shaped member can be inserted and a second open end on the opposite side of the first open end; and a cylindrical member having a projection that protrudes from the outer circumferential surface of the cylindrical body portion and can contact the pressing member when the rod-shaped member is inserted into the first open end. The inner diameter of the second open end is preferably larger than the inner diameter of the core tube of the raw material roll.

[0016] The present invention relates to a method for mounting raw material rolls using the raw material roll mounting system described above. The method for attaching the raw material roll preferably includes: a core tube insertion step of moving the raw material roll, in which the rod-shaped member is inserted into the core tube, by the moving means, and inserting the roll holding shaft into the core tube; a raw material roll pressing step of pressing the raw material roll by moving the pressing member in the detachment direction by the drive device after the core tube insertion step; and a raw material roll pressing step of pressing the raw material roll through the cylindrical member by moving the rod-shaped member, in which the cylindrical member is inserted, toward the roll holding shaft by the moving means while positioning it on the same axis as the roll holding shaft.

[0017] The present invention relates to a method for manufacturing sheet products using the raw material roll mounting system described above. Preferably, the method for manufacturing the sheet product includes: a core tube insertion step of moving the raw material roll in which the rod-shaped member is inserted into the core tube by the moving means and inserting the roll holding shaft into the core tube; a raw material roll pressing step of pressing the raw material roll by moving the pressing member in the detachment direction by the drive device after the core tube insertion step; and a raw material roll pressing step of pressing the raw material roll through the cylindrical member by moving the rod-shaped member in which the cylindrical member is inserted toward the roll holding shaft by the moving means while positioning it on the same axis as the roll holding shaft. [Effects of the Invention]

[0018] According to the raw material roll mounting system, raw material roll mounting method, and sheet processing method of the present invention, a raw material roll can be attached to the roll holding shaft with a simple configuration without complicating the control, and the raw material roll gripping means can be miniaturized and standardized. [Brief explanation of the drawing]

[0019] [Figure 1] Figure 1 is a schematic plan view illustrating the installation of the raw material roll mounting system according to this embodiment. [Figure 2] FIG. 2 is a schematic diagram for explaining the outline of the unwound roll mounting system of FIG. 1. [Figure 3] FIG. 3 is a diagram for explaining the outline of the unwound roll mounting hand, where (a) is a schematic perspective view and (b) is a schematic plan view. [Figure 4] FIG. 4 is a diagram for explaining the outline of the cylindrical member, where (a) is a schematic perspective view and (b) is a schematic plan view. [Figure 5] FIG. 5 is an explanatory diagram for explaining the operation of the unwound roll mounting system. [Figure 6] FIG. 6 is an explanatory diagram for explaining the operation of the unwound roll mounting system after FIG. 5. [Figure 7] FIG. 7 is an explanatory diagram for explaining the operation of the unwound roll mounting system when mounting another unwound roll.

MODE FOR CARRYING OUT THE INVENTION

[0020] Hereinafter, the unwound roll mounting system, the unwound roll mounting method, and the method for manufacturing a sheet processed product of the present invention will be described based on a preferred embodiment with reference to the drawings. FIG. 1 is a schematic plan view for explaining the installation situation of the unwound roll mounting system 1, and FIG. 2 is a schematic diagram for explaining the outline of the unwound roll mounting system 1.

[0021] [Overall Configuration of Unwound Roll Mounting System 1] As shown in FIGS. 1 and 2, the unwound roll mounting system 1 is a device that transfers an unused unwound roll R placed horizontally in the unwound roll placement space RS and attaches it to the roll holding shaft 11 of the sheet feeding device 10 (hereinafter referred to as the "unwound roll mounting operation"). The unwound roll mounting system 1 according to the present embodiment includes a sheet feeding device 10, a work robot 20, an unwound roll mounting hand 30, a cylindrical member 40, and a control device 50 that controls the sheet feeding device 10 and the work robot 20.

[0022] In this embodiment, the raw material roll R is a nonwoven fabric sheet S wound around a core tube RP, and is used, for example, in the manufacture of sanitary products such as diapers and feminine hygiene products. The core tube RP can be, for example, a paper tube, a PVC tube, or a metal tube such as stainless steel.

[0023] [Sheet dispensing device 10] The sheet dispensing device 10 rotatably supports the raw material roll R and dispenses the sheet S wound around the raw material roll R to processing equipment for manufacturing sanitary products via a plurality of guide rollers (not shown). The sheet feeding device 10 according to this embodiment is configured to include a roll holding shaft 11 and a joint 12.

[0024] As shown in Figure 1, the sheet feeding device 10 according to this embodiment consists of two sheet feeding devices 10A and 10B. The sheet feeding device 10A is a device that feeds out the raw material roll RA, and the sheet feeding device 10B is a device that feeds out the raw material roll RB, which has a wider roll width than the raw material roll RA. Since the sheet feeding devices 10A and 10B differ in the length of the roll holding shaft 11 and other components, but are otherwise identical, in the following explanation, unless otherwise necessary, the sheet feeding devices 10A and 10B will be collectively referred to as the sheet feeding device 10. Similarly, the raw material rolls RA and RB will be referred to as the raw material roll R unless otherwise necessary for the sake of explanation.

[0025] As shown in Figure 2, the roll holding shaft 11 has a pair of roll holding shafts 11a and 11b that are rotatably supported with respect to the support wall 13, and rotatably hold the raw material rolls R1 and R2 so that the sheet S is fed out. The pair of roll holding shafts 11a and 11b each have a cylindrical shape and rotatably support the raw material rolls R1 and R2 by inserting the core tubes RP of the raw material rolls R1 and R2. The roll holding shafts 11a and 11b extend from the support wall 13 in the direction in which the work robot 20 is installed, and are arranged at approximately the same height with a gap between them.

[0026] The splicing section 12 is a device that performs splicing work by connecting the end of the sheet S of the standby raw material roll R to the middle of the sheet S of the raw material roll R from which the sheet S is being fed out. Figure 2 shows a raw material roll R1 from which a sheet S is being fed, and a standby raw material roll R2. In the example shown in Figure 2, when the remaining amount of sheet S on raw material roll R1 becomes low, the splicing section 12 connects the end of the sheet S on raw material roll R2 to the middle of the sheet S on raw material roll R1. At this time, when the end of the sheet S on raw material roll R1 is connected to the sheet S on raw material roll R2, the sheet S on raw material roll R1 is cut upstream of that middle section. As a result, the raw material roll R that feeds the sheet S to the processing device, etc., shifts from raw material roll R1 to raw material roll R2.

[0027] In this embodiment, the remaining amount of sheet material on the raw material roll R is detected by a sheet material detector (not shown). Since the sheet material detector itself is well known, a detailed explanation will be omitted, but for example, a sensor that detects the distance to the outer surface of the raw material roll R can be used. In this case, the distance information detected by the sheet material detector is output to, for example, the control device 50, and the control device 50 determines whether or not the remaining amount of sheet material on the raw material roll R has decreased. In the following explanation, for convenience of explanation, the raw material roll R on the side that is feeding the sheet S to the processing device, etc. will be described as raw material roll R1 (hereinafter also referred to as "feeding-side raw material roll R1"), and the raw material roll R on the standby side will be described as raw material roll R2 (hereinafter also referred to as "standby-side raw material roll R2"), but the reverse is also acceptable.

[0028] [Working robot 20] As shown in Figures 1 and 2, the work robot 20 is a device that, in accordance with the control device 50, performs the following operations when the remaining amount of sheet S in the raw material roll R1 becomes low: (1) a "splicing operation" in which the end of the sheet S of the raw material roll R2 is pulled out and added to the sheet S of the raw material roll R1; (2) a "core tube removal operation" in which the core tube RP of the raw material roll R1 from which the supply of sheet S to the processing device, etc. has been stopped is removed from the roll holding shaft 11; and (3) a "raw material roll installation operation" in which a new raw material roll R is attached to the roll holding shaft 11 from which the core tube RP has been removed.

[0029] The work robot 20 according to this embodiment is positioned adjacent to the sheet feeding device 10 and comprises a base end portion 21, first arm portions 22 to fourth arm portions 25, and a head portion 26. Such a work robot 20 can be a so-called articulated robot.

[0030] The base portion 21 is connected to the base in a manner that allows it to swing around a first axis A1 extending in the vertical direction as the center of rotation. The first arm portion 22 is connected to the base portion 21 in a manner that allows it to swing around a second axis A2 extending in the horizontal direction as the center of rotation. The second arm portion 23 is connected to the first arm portion 22 in a manner that allows it to swing around a third axis A3 extending in the horizontal direction as the center of rotation. The third arm portion 24 is connected to the second arm portion 23 in a manner that allows it to rotate around a fourth axis A4 extending in a direction perpendicular to the third axis A3 as the center of rotation. The fourth arm portion 25 is connected to the third arm portion 24 in a manner that allows it to rotate around a fifth axis A5 extending in a direction perpendicular to the fourth axis A4 as the center of rotation. The head portion 26 is connected to the fourth arm portion 25 in a manner that allows it to rotate around a sixth axis A6 extending in a direction perpendicular to the fifth axis A5 as the center of rotation.

[0031] The base portion 21, the first arm portions 22 to the fourth arm portions 25, and the head portion 26 are configured to rotate or swivel around the first axis A1 to the sixth axis A6 as the center of rotation by a drive source such as a motor (not shown). In other words, in this embodiment, the head portion 26, which is the tip of the work robot 20, can move three-dimensionally in the horizontal and vertical directions by the swinging of the first arm portions 22 to the third arm portions 24, and can also swivel, bend, and rotate around the fourth axis A4 to the sixth axis A6 as the center of rotation.

[0032] The head unit 26 is equipped with a hand appropriate for each operation, such as a paper guide hand (not shown) for splicing, a core tube removal hand (not shown) for core tube removal, and a raw material roll mounting hand 30 (see Figure 3) for raw material roll mounting.

[0033] Each of the above-mentioned hands is always placed on a hand rest space HS, for example, a paper guide hand rest HS1, a raw material roll mounting hand rest HS2, and a core tube hand rest HS3, respectively, and when the work robot 20 operates, the hand corresponding to each task is attached to the head unit 26. In this embodiment, paper guide hands are provided for the sheet feeding device 10A, which pulls out sheets S from the raw material roll RA, and for the sheet feeding device 10B, which pulls out sheets S from the raw material roll RB. To prevent incorrect connection to the head unit 26, these paper guide hands are placed on different rests on the paper guide hand rest HS1, for example, rest HS1-1 for the sheet feeding device 10A and rest HS1-2 for the sheet feeding device 10B.

[0034] For example, when the work robot 20 performs the "raw material roll installation work" following the "core tube removal work," it sequentially performs the following operations in accordance with the control device 50: (1) the head unit 26 rotates so that it is positioned on the core tube hand rest HS3; (2) the core tube hand connected to the head unit 26 is removed and placed on the core tube hand rest HS; (3) the head unit 26 rotates so that it is positioned on the raw material roll installation hand rest HS2; and (4) the raw material roll installation hand 30 is attached to the head unit 26. As will be described in more detail later, when the work robot 20 performs the "raw material roll installation work," it takes out the raw material roll R (see "raw material roll RA.RB" in Figure 1) placed on the raw material roll storage space RS and transports it, and also performs the operation of attaching the raw material roll R to the roll holding shaft 11.

[0035] In addition to articulated robots, other types of robots can be used for the work robot 20. In this case, provided that (1) the end of the sheet S pulled out from the raw material roll R can be transported to the joint 12, and (2) the tip is rotatable, as in the head unit 26 of this embodiment, for example, a serial type cylindrical coordinate robot or a polar coordinate robot can be used.

[0036] [Raw material roll attachment handle 30] As shown in Figures 2 and 3, the raw material roll mounting hand 30 is a device used when performing the "raw material roll mounting work". The raw material roll mounting hand 30 according to this embodiment is configured to include a base 31, a rod-shaped member 32, and a pusher device 35.

[0037] [Base 31] The base 31 has a roughly cylindrical shape and is a component that can be detachably attached to the head portion 26 (see Figure 2) of the work robot 20. The base 31 has one end surface 31a that is connected in surface contact with the tip surface of the head portion 26, and the other end surface 31b to which the rod-shaped member 32 is attached.

[0038] [Rod-shaped member 32] The rod-shaped member 32 has a cylindrical main body 33 and a plurality of pressure contact portions 34. The main body 33 protrudes from the other end face 31b of the base 31 and has an outer diameter shape that allows it to be inserted into the core tube RP of the raw material roll R. The main body 33 is positioned on the axis of the sixth axis A6 (see Figure 2) when the raw material roll mounting hand 30 is attached to the head portion 26 (see Figure 2) of the work robot 20. Multiple elongated holes 33a extending along the axial direction are formed on the outer circumferential surface of the main body 33. It is preferable that the tip of the rod-shaped member 32 be formed in a tapered shape or dome shape that narrows towards the radial center, from the viewpoint of improving ease of insertion into the core tube RP of the raw material roll R and the cylindrical member 40.

[0039] Each of the multiple contact portions 34 is configured to be movable in the same direction between a contact position that protrudes radially outward from the hole 33a of the main body portion 33 and a retracted position that is retracted radially inward from the outer circumferential surface of the main body portion 33. Multiple contact portions 34 are arranged along the radial direction of the main body portion 33, as well as along its axial direction. Furthermore, each contact portion 34 has a plate shape that extends along the axial direction of the main body portion 33, and its outer surface is formed in an uneven manner.

[0040] In this embodiment, with the rod-shaped member 32 inserted into the core tube RP (see Figure 1) of the raw material roll R, when the pressure contact portion 34 moves from the retracted position to the pressure contact position, the pressure contact portion 34 bites into the inner circumferential surface of the core tube RP. As a result, the raw material roll R is held by the raw material roll mounting hand 30. Furthermore, in this embodiment, in addition to the raw material roll R, the cylindrical member 40 (see Figure 4) is also held by the pressure-welding portion 34. The holding of the cylindrical member 40 by the pressure-welding portion 34 is performed by moving the pressure-welding portion 34 from the retracted position to the pressure-welding position, similar to the core tube RP of the raw material roll R. The pressure-welding portion 34 can release the holding of the raw material roll R or the cylindrical member 40 by moving the pressure-welding portion 34 from the pressure-welding position to the retracted position. Furthermore, the contact portion 34 can be driven by a drive source such as a motor or air pressure.

[0041] [Pusher device 35] The pusher device 35 is a device for pushing the raw material roll R, into which the rod-shaped member 32 is inserted, in a direction away from the rod-shaped member 32. The pusher device 35 comprises a pressing member 36 and a pair of drive devices 37. The pressing member 36 is a plate-shaped member having a donut shape and is positioned with the rod-shaped member 32 loosely passing through it. The pressing member 36 is connected to a pair of slide mechanisms 37a, 37a, which will be described later, and is configured to move along the axial direction of the rod-shaped member 32 between a pressing position (second position) that presses the raw material roll R and a non-pressing position (first position) that does not press it. As will be described in detail later, when the rod-shaped member 32 is inserted into the core tube RP of the raw material roll R, the pressing member 36 makes surface contact with the side of the raw material roll R, and when the rod-shaped member 32 is inserted into the cylindrical member 40, it makes surface contact with the flange portion 42 (see Figure 4) of the cylindrical member 40, which will be described later.

[0042] In this embodiment, since the pressing member 36 is donut-shaped, it is possible to increase the contact area that comes into surface contact with the side of the raw material roll R including the core tube RP and the flange portion 42 of the cylindrical member 40. As a result, the pressing force from the pusher device 35 can be transmitted effectively, and the raw material roll R and the cylindrical member 40 can be pressed efficiently. From this viewpoint, it is preferable that the outer diameter of the pressing member 36 is formed to be larger than, for example, the outer diameter of the flange portion 42 of the cylindrical member 40.

[0043] The pressing member 36 can be formed using various metal materials such as aluminum, stainless steel, or iron, or resin materials. The pressing member 36 is not limited to a donut shape; it may also have other shapes, such as a polygonal shape with a hole.

[0044] The drive device 37 has a sliding mechanism 37a that can move back and forth along the axial direction of the rod-shaped member 32, and can be configured with a device that uses a motor, air pressure, or the like as a drive source. The sliding mechanism 37a has a substantially rod shape, and its tip is connected to the base 31 side surface of the pressing member 36. The pair of drive units 37 are attached to the base 31 side of the rod-shaped member 32 so as to sandwich the rod-shaped member 32, and are configured to operate synchronously with each other. The drive units 37 are not limited to being attached to the rod-shaped member 32, but may also be attached to the base 31. Furthermore, the number of drive units 37 is not limited to two, but may be one or three or more.

[0045] As will be explained in more detail later, the "raw material roll installation work" is configured to sequentially perform the following steps: (1) insert a portion of the core tube RP of the raw material roll R into the roll holding shaft 11 to temporarily hold the raw material roll R in the sheet feeding device 10 (see Figure 5; hereafter this work is referred to as the "temporary holding work"), and (2) then push the raw material roll R in to move it to the correct position (position "P2" in Figures 6(b) and (c); hereafter this work is referred to as the "completed installation position P2") (see Figure 6; hereafter this work is referred to as the "final holding work"). The pusher device 35 moves the pressing member 36 from the non-pressed position to the pressed position, thereby moving the raw material roll R to the temporary holding completion position (position "P1" in Figure 5(b), hereinafter referred to as "temporary holding completion position P1") during the "temporary holding operation," and moving the raw material roll R to the mounting completion position P2 (see Figure 6(c)) during the "permanent holding operation." The pushing operation by the pusher device 35 will be described later.

[0046] [Cylindrical member 40] As shown in Figure 4, the cylindrical member 40 is a member into which the rod-shaped member 32 can be inserted, and is composed of a cylindrical body portion 41 and a flange portion 42. The cylindrical member 40 can be formed using, for example, a metal material such as aluminum, stainless steel, iron, or a combination thereof, or a resin material. The cylindrical body portion 41 has a cylindrical shape with a first open end 41a into which the rod-shaped member 32 is inserted, and a second open end 41b on the opposite side. The inner diameter of the cylindrical body portion 41 is larger than the outer diameter of the roll holding shaft 11 and is set to be smaller than or equal to the outer diameter of the core tube RP of the raw material roll R. Also, the outer diameter of the cylindrical body portion 41 is smaller than the inner diameter of the pressing member 36 and is set to be larger than or equal to the outer diameter of the core tube RP of the raw material roll R. The reason for setting the inner and outer diameters of the cylindrical body portion 41 to these sizes will be explained later. The flange portion 42 has an annular shape and protrudes from the outer circumferential surface of the first open end 41a. The cylindrical member 40 can, for example, have a length (see "tube length L3" in Figures 6 and 7) between the second open end 41b and the surface of the flange portion 42 on the first open end 41a side that contacts the pressing member 36, which can be set to, for example, 300 mm or more and 400 mm or less. Furthermore, the flange portion 42 is not limited to being provided protruding from the outer circumferential surface of the first open end 41a; for example, it can also be provided protruding from the outer circumferential surface of the cylindrical body portion 41 that is spaced a predetermined distance in the axial direction from the first open end 41a.

[0047] In this embodiment, the cylindrical member 40 is attached to the rod-shaped member 32 when performing the "main holding operation". With the cylindrical member 40 attached to the rod-shaped member 32, the first open end 41a is inserted through the pressing member 36 of the pusher device 35, and the flange portion 42 is in surface contact with the pressing member 36 of the pusher device 35. In this state, the cylindrical member 40 is held by the rod-shaped member 32 by moving the pressure contact portion 34 to the pressure contact position (see Figure 3(b)).

[0048] As will be explained in more detail later, the cylindrical member 40 can be pushed in while the roll holding shaft 11 is inserted by a pushing motion performed by the work robot 20 (see Figures 6(a) and (b)). As described above, the cylindrical member 40 has an inner diameter set to be less than or equal to the outer diameter of the core tube RP of the raw material roll R, and an outer diameter set to be greater than or equal to the outer diameter of the core tube RP. Therefore, it is possible to push the raw material roll R while the cylindrical member 40 is in contact with the core tube RP. In other words, in this embodiment, the pushing force from the work robot 20 can be transmitted to the raw material roll R via the rigid core tube PR, so that the raw material roll R can be efficiently moved toward the installation completion position P2.

[0049] Furthermore, in this embodiment, the pushing operation by the work robot 20 via the cylindrical member 40 does not directly move the raw material roll R to the mounting completion position P2, but is configured to stop the pushing operation at a position just before reaching the mounting completion position P2 (see Figure 6(b)). This makes it possible to avoid contact between the rod-shaped member 32 and the roll holding shaft 11 by the pushing operation by the work robot 20, thereby preventing damage to the rod-shaped member 32 and the roll holding shaft 11, etc. As will be explained in more detail later, the movement of the raw material roll R to the completed mounting position P2 is performed by a pushing operation by the pusher device 35 (see Figure 6(c)).

[0050] [Control device 50] As shown in Figures 1 and 2, the control device 50 consists of, for example, a known programmable logic controller and includes a central processing unit (CPU, not shown) and a memory unit (not shown). The central processing unit reads various programs stored in the memory unit and performs predetermined calculations to control the operation of various devices. Specifically, the central processing unit according to this embodiment controls the sheet feeding device 10, the work robot 20, and the raw material roll attachment hand 30, etc., based on detection results from sensors such as a sheet remaining amount detector (not shown).

[0051] For example, when the control device 50 receives a signal from the sheet feeding device 10 indicating that the "joining operation" has been completed (joining completion signal), it controls the work robot 20 by outputting the following commands: (1) a command signal to remove the paper guide hand attached to the head unit 26 and place it on the paper guide hand stand HS; (2) a command signal to attach the core tube hand (not shown) placed on the core tube hand stand HS3 to the head unit 26; and (3) a command signal to remove the core tube RP of the used raw material roll R using the core tube hand. As a result, the work robot 20 with the core tube hand attached to the head unit 26 performs the "core tube removal operation," that is, the core tube RP of the used raw material roll R, for example, the raw material roll R1 on the feeding side (see Figure 2), is removed from the roll holding shaft 11 and then collected in the core tube collection box DB. In Figure 1, DBA indicates the core tube collection box for the sheet feeding device 10A, and DBB indicates the core tube collection box for the sheet feeding device 10B. In this embodiment, the "core tube removal operation" is performed first, followed by the "raw material roll installation operation." This "raw material roll installation operation" will be described later.

[0052] [Operation of the raw material roll mounting system 1] Next, the operation of the raw material roll mounting system 1, which performs the "raw material roll mounting work," will be explained with reference to Figures 1, 5, and 6. For the sake of clarity, the following explanation assumes that (1) after the "core tube removal operation" by the work robot 20, the raw material roll RA is not attached to the roll holding shaft 11A, and (2) the raw material roll attachment hand 30 is attached to the head 26 of the work robot 20. Furthermore, the following explanation will first describe the case in which the raw material roll RA is attached to the roll holding shaft 11A (see Figure 1) of the sheet feeding device 10A, and then describe the case in which the raw material roll RB is attached to the roll holding shaft 11B (see Figure 1).

[0053] As described above, in the "raw material roll mounting operation" according to this embodiment, a "temporary holding operation" (see Figure 5) is performed to temporarily hold the raw material roll RA on the roll holding shaft 11A, and then a "final holding operation" (see Figure 6) is performed to move it to the mounting completion position P2 on the roll holding shaft 11. For this reason, the operation of the raw material roll mounting system 1 in the "temporary holding operation" and the operation of the raw material roll mounting system 1 in the "final holding operation" will be described separately below.

[0054] The raw material roll RA has a roll width L1 (see Figure 5(a)) of, for example, 200 mm to 400 mm, and a roll diameter of preferably 600 mm to 1100 mm. In this case, it is preferable that the length of the core tube RP of the raw material roll RA is the same as the roll width L1 of the raw material roll RA.

[0055] [Actions during temporary holding] First, we will explain the "temporary holding process" with reference to Figures 1 and 5. As shown in Figures 1 and 5, the "temporary holding operation" begins with the raw material roll RA being held by the raw material roll attachment hand 30, which is attached to the head 26 of the work robot 20. Specifically, the raw material roll RA is held by the raw material roll mounting hand 30 by rotating the work robot 20 around the first axis A1 (see Figure 2) as the center of rotation, and inserting the rod-shaped member 32 into the core tube RP of the raw material roll RA placed on the raw material roll storage space RS. At this time, the raw material roll mounting hand 30 is configured to move the contact portion 34 of the rod-shaped member 32 from the retracted position to the contact position while the side of the raw material roll RA and the pressing member 36 located in the non-pressing position are in surface contact. As a result, the contact portion 34 bites into the inner circumferential surface of the core tube RP, making it possible to hold the raw material roll RA securely. In this embodiment, in this state, the core tube RP of the raw material roll RA is positioned so that it protrudes from the tip of the rod-shaped member 32.

[0056] Furthermore, from the viewpoint of ensuring that the rod-shaped member 32 securely holds the raw material roll RA, the roll width of the raw material roll RA (see "Roll Width L1" in Figure 5(a)) is greater than or equal to the distance between the tip of the rod-shaped member 32 and the pressing member 36 located in the non-pressing position (hereinafter referred to as "Maximum Insertion Length A," see "Maximum Insertion Length A" in Figure 5(a)), and more preferably, it is 1.1 times or more the maximum insertion length A.

[0057] Next, the robotic operator 20 positions the rod-shaped member 32 on the axis of the roll holding shaft 11A, and then inserts the roll holding shaft 11A into the core tube RP of the raw material roll RA. As shown in Figure 5(a), in this embodiment, the head portion 26 of the work robot 20 is configured to move until the distance between the rod-shaped member 32 and the roll holding shaft 11A becomes a predetermined distance α1, and to stop at the position where the distance α1 is reached. In Figures 5 and 6, "L2" indicates the distance between the insertion side of the raw material roll RA and the mounting completion position P2 in this state (hereinafter referred to as "remaining insertion distance L2"). In other words, in this embodiment, contact between the rod-shaped member 32 and the roll holding shaft 11A can be prevented, thus preventing damage to the raw material roll mounting hand 30, the roll holding shaft 11A, etc. Furthermore, the above distance α1 can be expressed as shown in the following equation (1), where L1 is the roll width, L2 is the remaining insertion distance, A is the maximum insertion length, and B is the axial length of the roll holding shaft 11A (see Figure 5(a)). α1 = L1 + L2 - (A + B) ... (1) In other words, in order to prevent the rod-shaped member 32 from coming into contact with the roll holding shaft 11A, "α1 > 0" must be met. In this case, the following relation (2) will be satisfied. A <L1+L2-B···(2)

[0058] The distance α1 between the rod-shaped member 32 and the roll holding shaft 11A can be, for example, 2 mm. Furthermore, from the viewpoint of reliably holding the core tube RP of the raw material roll RA on the roll holding shaft 11A, the effective length A of the rod-shaped member 32 is preferably 0.1 to 0.8 times, more preferably 0.25 to 0.6 times, the axial length B of the roll holding shaft 11A.

[0059] Subsequently, as shown in Figure 5(b), in this embodiment, the drive device 37 is operated while maintaining the distance α1 formed between the rod-shaped member 32 and the roll holding shaft 11A, thereby moving the pressing member 36 from the non-pressed position to the pressed position. Specifically, the operation shown in Figure 5(b) is performed in the following steps: (1) move the pressure contact portion 34 of the rod-shaped member 32 from the pressure contact position to the retracted position, making the raw material roll RA movable along the rod-shaped member 32; and (2) activate the drive device 37 to move the pressing member 36 toward the pressing position. As a result, the raw material roll RA is further inserted into the roll holding shaft 11A by the distance the pressing member 36 moves (hereinafter referred to as "pressing distance st"), and moves to the temporary holding position P1 (see "L2-st" in Figure 5(b)). In this embodiment, the "temporary holding operation" is completed by the pushing operation of the pusher device 35 described above, and thereafter the work robot 20 is moved to the origin position (the position of the work robot 20 shown in Figure 1). The pushing distance st of the pusher device 35 may be set in advance to a value such as 100 mm, or it may be varied according to the roll width of the raw material roll R, etc.

[0060] [Operations during this holding operation] Next, the "main holding operation" will be explained with reference to Figures 1 and 6. As shown in Figures 1 and 6, the "main holding operation" begins with attaching the cylindrical member 40 to the raw material roll attachment hand 30. Specifically, the cylindrical member 40 is attached to the raw material roll mounting hand 30 by rotating the work robot 20 around the first axis A1 (see Figure 2) as the center of rotation, and inserting the rod-shaped member 32 into the cylindrical member 40 which is placed on the cylindrical member mounting base JS. At this time, the raw material roll mounting hand 30 moves the contact portion 34 of the rod-shaped member 32 from the retracted position to the contact position while the flange portion 42 of the cylindrical member 40 and the pressing member 36, which is located in the non-pressing position, are in surface contact. As a result, the contact portion 34 bites into the inner circumferential surface of the cylindrical member 40, making it possible to hold the cylindrical member 40 securely. In this embodiment, in this state, the cylindrical member 40 is positioned so that it protrudes from the tip of the rod-shaped member 32 (see Figure 3(b), etc.).

[0061] Next, the work robot 20 positions the rod-shaped member 32, to which the cylindrical member 40 is attached, on the axis of the roll holding shaft 11A, and then moves it toward the tip of the roll holding shaft 11A (see Figures 6(a) and (b)). Figure 6(a) is a schematic side view showing the state when the second open end 41b of the cylindrical member 40 comes into contact with the raw material roll RA, and Figure 6(b) is a schematic side view showing the state in which the raw material roll RA has been pushed to a predetermined position via the cylindrical member 40.

[0062] As shown in Figure 6(a), when the rod-shaped member 32 to which the cylindrical member 40 is attached is moved as described above, the second open end 41b of the cylindrical member 40 comes into contact with the side of the raw material roll RA (see Figure 6(a)), and thereafter the raw material roll RA is moved via the cylindrical member 40 (see Figure 6(b)).

[0063] As described above, the cylindrical member 40 in this embodiment has an inner diameter set to be less than or equal to the outer diameter of the core tube RP of the raw material roll RA, and an outer diameter set to be greater than or equal to the outer diameter of the core tube RP. That is, in this embodiment, when the rod-shaped member 32 to which the cylindrical member 40 is attached is moved along the axis of the roll holding shaft 11A, the second open end 41b of the cylindrical member 40 can be brought into contact with the end of the core tube RP. Therefore, in this embodiment, the rigid core tube PR can be directly pressed by the cylindrical member 40, making it possible to efficiently move the raw material roll R toward the mounting completion position P2.

[0064] Furthermore, in this embodiment, when the rod-shaped member 32 to which the cylindrical member 40 is attached is moved toward the mounting completion position P2, the cylindrical member 40 is configured to be externally fitted onto the roll holding shaft 11A. Therefore, it is possible to push the raw material roll RA further toward the mounting completion position P2.

[0065] As shown in Figure 6(b), in this embodiment, the movement of the rod-shaped member 32 is stopped when the distance between the rod-shaped member 32 and the roll-holding shaft 11A reaches a predetermined distance α2 due to the operation of the work robot 20. This prevents contact between the rod-shaped member 32 and the roll-holding shaft 11A, thereby preventing damage to the raw material roll mounting hand 30, the roll-holding shaft 11A, etc. For example, the distance α2 between the rod-shaped member 32 and the roll-holding shaft 11A can be set to 50 mm. Furthermore, the above distance α2 can be expressed by the following equation (3), where L1 is the roll width, L3 is the length of the cylindrical member 40, A is the maximum insertion length, B is the axial length of the roll holding shaft 11A, and β is the gap between the raw material roll RA and the mounting completion position P2 (see Figure 6(b)). α² = L1 + L3 - (A + B) + β···(3) In other words, in order to prevent the rod-shaped member 32 from coming into contact with the roll holding shaft 11A, "α2 > 0" must be met. In this case, the following relationships (4) and (5) will be satisfied. A <L1+L3-B+β···(4) L3>A+B-L1-β···(5)

[0066] Furthermore, when the rod-shaped member 32 is moved to the position corresponding to the distance α2 described above, the raw material roll RA is positioned with a gap β between it and the completed mounting position P2. This gap β can be, for example, 5 mm. If the system were configured to directly push the raw material roll RA to the mounting completion position P2 solely by the movement of the work robot 20 without providing a gap β, depending on the pushing speed, there is a possibility that it may forcefully contact a stopper member or the like provided at the mounting completion position P2. In such a case, the impact caused by the contact would be transmitted to the work robot 20 via the raw material roll mounting hand 30, which could cause malfunction or damage to the work robot 20. In this embodiment, however, such a situation can be prevented. Furthermore, in this embodiment, the distance α2 can be set to be longer by the length of the gap β, making it possible to further avoid contact between the rod-shaped member 32 and the roll holding shaft 11A.

[0067] As shown in Figure 6(c), in this embodiment, the pusher device 35 is then operated to push the raw material roll RA into the gap β described above. Specifically, the operation shown in Figure 6(c) is performed in the following steps: (1) move the pressure contact portion 34 of the rod-shaped member 32 from the pressure contact position to the retracted position, making the cylindrical member 40 movable on the rod-shaped member 32; and (2) activate the drive device 37 to move the pressing member 36 toward the pressing position, pressing the raw material roll RA via the cylindrical member 40. As a result, the raw material roll RA is pressed via the cylindrical member 40 until it reaches the mounting completion position P2. In this embodiment, the pushing operation by the pusher device 35 is stopped when the raw material roll RA is in the mounting completion position P2, thereby completing the "main holding operation".

[0068] Furthermore, it is preferable that the pressing position of the pressing member 36 is set at a predetermined distance from the tip of the rod-shaped member 32 toward the base 31 when viewed from the side. This is because if the pressing member 36 moves beyond the tip of the rod-shaped member 32, the cylindrical member 40 will fall out of the rod-shaped member 32, making it difficult for the work robot 20 to retrieve the rod-shaped member 32.

[0069] Furthermore, from the viewpoint of ensuring reliable pressing of the raw material roll RA through the cylindrical member 40, the length between the second open end 41b of the cylindrical member 40 and the surface of the flange portion 42 that contacts the pressing member 36 on the side of the first open end 41a is preferably 0.3 to 1.1 times, more preferably 0.4 to 1.0 times, the axial length B of the roll holding shaft 11A.

[0070] After the work robot 20 moves the raw material roll RA to the mounting completion position P2, it rotates to the origin position (the position of the work robot 20 shown in Figure 1), and the raw material roll mounting hand 30 is removed from the head unit 26 and placed on the raw material roll mounting hand stand HS2. Subsequently, in this embodiment, a "raw material roll attachment operation" is performed to pull out the end of the sheet S of the raw material roll RA attached to the roll holding shaft 11A and to splice that end onto the other raw material roll RA ("splicing operation") (see Figure 1, etc.). This makes it possible to supply sheets to processing equipment that processes sanitary products such as diapers and feminine hygiene products without interruption. In other words, according to this embodiment, by using the raw material roll attachment system 1 described above, it is possible to efficiently manufacture sheets that have been spliced ​​by the "splicing operation" as sheet processed products, as well as sanitary products such as diapers and feminine hygiene products obtained by processing said sheets. In this embodiment, the raw material roll mounting system 1 is configured to perform a "joining operation," but the present invention can also be applied to systems that do not perform such an operation.

[0071] Thus, in this embodiment, after inserting the core tube RP of the raw material roll RA into the roll holding shaft 11A, the raw material roll R is pushed in via the cylindrical member 40 attached to the rod-shaped member 32. In other words, in this embodiment, the attachment of the raw material roll RA to the roll holding shaft 11A can be done with little reliance on the pushing operation of the pusher device 35, making it possible to attach a relatively small pusher device 35 to the raw material roll attachment hand 30. In this case, the length of the rod-shaped member 32 can be shortened, and the weight of the raw material roll attachment hand 30 can be reduced accordingly. In other words, by reducing the weight of the raw material roll attachment hand 30, it becomes possible to increase the weight of the raw material roll RA that can be carried by the raw material roll attachment hand 30.

[0072] Furthermore, in this embodiment, the raw material roll RA is attached to the roll holding shaft 11A by pushing it in through a cylindrical member 40 attached to the raw material roll mounting hand 30 (see Figure 6(b)). In other words, with this configuration, by appropriately adjusting the length L3 of the cylindrical member 40, it is possible to attach raw material rolls R of any roll width to the roll holding shaft 11. For this reason, according to this embodiment, the raw material roll mounting hand 30 can be standardized, making it highly versatile.

[0073] Furthermore, in this embodiment, since the attachment of the raw material roll RA to the roll holding shaft 11A is simply a matter of horizontally moving the rod-shaped member 32 while positioning it on the axis of the roll holding shaft 11A, the control of this process can also be made relatively simple.

[0074] [Installation operation of raw material roll RB] Next, the case of attaching the raw material roll RB to the roll holding shaft 11B will be explained with reference to Figures 1 and 7. In the following explanation, it is assumed that the work robot 20, the raw material roll attachment hand 30, and the cylindrical member 40 are the same as those used when attaching the raw material roll RA to the roll holding shaft 11A. Furthermore, the configuration of the mounting operation of the raw material roll RB shown in Figure 7 and the configuration of the mounting operation of the raw material roll RA described above (see Figures 5 and 6) are identical except for the size of the raw material roll and the length of the roll holding shaft. Therefore, unless necessary, the same reference numerals are used and their descriptions are omitted.

[0075] As shown in Figure 7, the raw material roll RB is attached to the roll holding shaft 11B by performing "temporary holding work" and "final holding work" in the same way as when attaching the raw material roll RA to the roll holding shaft 11A (see Figures 5 and 6).

[0076] For the raw material roll RB, the roll width L1' (see Figure 7(a)) is, for example, 500 mm to 600 mm, and the roll diameter is preferably 600 mm to 1100 mm. In this case, it is preferable that the length of the core tube RP of the raw material roll RB is the same as the roll width L1' of the raw material roll RB.

[0077] As shown in Figure 1, the "temporary holding operation" when attaching the raw material roll RB to the roll holding shaft 11B begins by first rotating the work robot 20 around the first axis A1 (see Figure 2) as the center of rotation, and inserting the rod-shaped member 32 (see Figure 7) into the core tube RP of the raw material roll RB placed on the raw material roll storage space RS. At this time, the pressure contact portion 34 of the rod-shaped member 32 is moved from the retracted position to the pressure contact position, and the raw material roll RB is held by the rod-shaped member 32 (see Figure 3).

[0078] Next, as shown in Figure 7(a), the work robot 20 positions the rod-shaped member 32 on the axis of the roll holding shaft 11B, and then inserts it into the core tube RP of the raw material roll RB onto the roll holding shaft 11B. At this time, the work robot 20 moves the head unit 26 until the distance between the rod-shaped member 32 and the roll holding shaft 11A becomes a predetermined distance α1, and stops at that position. This prevents contact between the rod-shaped member 32 and the roll holding shaft 11B, thereby preventing damage to the raw material roll mounting hand 30, the roll holding shaft 11B, etc. The distance α1 between the rod-shaped member 32 and the roll holding shaft 11B can be, for example, 2 mm.

[0079] As shown in Figure 7(b), the raw material roll RB is then moved by the pushing operation of the pusher device 35 by the pushing distance st, similar to when the raw material roll RA was moved by the pushing distance st (see Figure 5(b)). This moves the raw material roll RB to the temporary holding position P1, completing the "temporary holding operation" (see "L2-st" in Figure 7(b)).

[0080] Next, in order to perform the "main holding operation," the work robot 20 first rotates around the first axis A1 (see Figure 2) as the center of rotation and inserts the rod-shaped member 32 into the cylindrical member 40 placed on the cylindrical member support stand JS. At this time, the pressure contact portion 34 of the rod-shaped member 32 moves from the retracted position to the pressure contact position, and the cylindrical member 40 is held by the rod-shaped member 32 (see Figure 3).

[0081] Subsequently, as shown in Figure 7(c), the work robot 20 positions the rod-shaped member 32 on the axis of the roll holding shaft 11B, and then inserts the cylindrical member 40 into the roll holding shaft 11B. At this time, the work robot 20 moves the head unit 26 until the distance between the rod-shaped member 32 and the roll holding shaft 11A becomes a predetermined distance α2', and stops at that position. This prevents contact between the rod-shaped member 32 and the roll holding shaft 11A, thereby preventing damage to the raw material roll mounting hand 30 and the roll holding shaft 11A. The distance α2' between the rod-shaped member 32 and the roll holding shaft 11B can be, for example, 2 mm.

[0082] Furthermore, when the rod-shaped member 32 is moved to the position corresponding to the distance α2' described above, the raw material roll RB is positioned with a gap β' between it and the completed mounting position P2, similar to when the raw material roll RB is attached to the roll holding shaft 11A (see Figure 5(b)). This gap β' can be, for example, 2 mm. This makes it possible to avoid contact between the raw material roll RB and the stopper member, etc., provided at the mounting completion position P2, due to the movement of the head portion 26. As a result, it is possible to reliably prevent the impact force associated with such contact from being transmitted to the work robot 20 via the cylindrical member 40, etc., thereby preventing damage to the raw material roll mounting hand 30 and the head portion 26 of the work robot 20.

[0083] As shown in Figure 7(d), the raw material roll RB is then moved by the pushing action of the pusher device 35 by the aforementioned gap β', similar to when the raw material roll RA was moved by the gap β (see Figure 6(c)). This moves the raw material roll RB to the mounting completion position P2, and the "main holding operation" is completed.

[0084] Thus, in this embodiment, even when a raw material roll RB with a different roll width from the raw material roll RA is attached to the roll holding shaft 11B, it is possible to use the same raw material roll mounting hand 30 and cylindrical member 40. Therefore, according to this embodiment, not only the raw material roll mounting hand 30 but also the cylindrical member 40 can be standardized.

[0085] In this embodiment, a raw material roll R in which a nonwoven fabric sheet is wound around a core tube RP was used, but a raw material roll in which a so-called backing sheet or cardboard backing sheet is wound around a core tube RP may also be used. Furthermore, in this embodiment, the inner diameter of the cylindrical member 40 is formed to be less than or equal to the outer diameter of the core pipe RP, and the outer diameter of the cylindrical member 40 is set to be greater than or equal to the outer diameter of the core pipe RP, thereby configuring the cylindrical member 40 to directly press against the core pipe RP. However, the present invention is not limited thereto, and for example, the inner diameter of the cylindrical member 40 can be set to be larger than the outer diameter of the core pipe RP, thereby configuring the cylindrical member 40 to press against the sheet S surface that constitutes the side surface of the raw material roll R. Although the present invention has been described above based on preferred embodiments and modifications thereof, the present invention is not limited to the embodiments and modifications described above. [Explanation of Symbols]

[0086] 1. Roll mounting system for raw material. 10, 10A, 10B Sheet dispensing device 11, 11A, 11B, 11a, 11b Roll holding shaft 12. Joint 13 Supporting wall 20. Work robots (means of transportation) 21 Proximal end 22 First Arm Section 23 Second Arm Section 24 Third Arm Section 25. Fourth Arm Section 26 Head section 30. Roll attachment handle (roll holding means) 31 base 31a One end face 31b Other end surface 32 Rod-shaped member 33 Main body 33a hole 34 Pressure-welded section 35 Pusher device 36 Pressing member 37 Drive unit 37a Slide mechanism 40 Cylindrical member 41 Cylindrical main body 41a 1st open end 41b 2nd open end 42 Flange (protrusion) 50 Control device R, RA, RB, R1, R2 raw material roll RP core tube S Seat A1~A6 1st axis~6th axis RS raw material roll storage space HS Hand rest space HS1 Paper Handheld Stand HS1-1,HS1-2 stand HS2 Roll Mounting Hand Stand HS3 Core Tube Handheld Stand JS cylindrical member stand DB, DBA, DBB Core Tube Collection Box α1, α2, α2', β, β' distance A Maximum insertion length B. Axial length of the roll holding shaft L1 Roll width L2 Remaining indentation distance L3 Tube Length st Push distance P1 Temporary holding completion position P2 Completed installation position

Claims

1. A raw material roll mounting system for attaching a raw material roll to a roll holding shaft that rotatably supports the raw material roll, A raw material roll holding means comprising: a rod-shaped member that can be inserted into the core tube of the raw material roll; a pressing member that presses the raw material roll, in which the rod-shaped member is inserted into the core tube, in a detachment direction to detach it from the rod-shaped member; and a drive device that moves the pressing member in the detachment direction. A moving means connected to the aforementioned raw material roll holding means moves the raw material roll in which the rod-shaped member is inserted into the core tube, and inserts the roll holding shaft into the core tube, The cylindrical body portion has a first open end into which the rod-shaped member can be inserted and a second open end opposite to the first open end, and the cylindrical member has a projection that protrudes from the outer surface of the cylindrical body portion and can contact the pressing member when the rod-shaped member is inserted into the first open end. The inner diameter of the second open end is less than or equal to the outer diameter of the core tube. A raw material roll mounting system wherein the outer diameter of the second open end is greater than or equal to the outer diameter of the core tube.

2. The pressing member is, The aforementioned rod-shaped member has a hole through which it can freely pass, The raw material roll mounting system according to claim 1, wherein the cylindrical member is attached to the rod-shaped member, and the system has a contact surface that contacts the protruding portion.

3. The raw material roll mounting system according to claim 2, wherein the pressing member is a plate-shaped member having a donut shape.

4. The pressing member is movable back and forth along the longitudinal direction of the rod-shaped member between a first position and a second position located further in the direction of departure than the first position. The second position is set at a position that, when viewed from a direction intersecting the longitudinal direction, is spaced apart from the tip of the rod-shaped member in the direction opposite to the direction of separation. A raw material roll mounting system according to any one of claims 1 to 3.

5. The raw material roll mounting system according to any one of claims 1 to 4, wherein the tip of the rod-shaped member has a shape that tapers towards the tip.

6. A method for mounting a raw material roll using the raw material roll mounting system described in any one of claims 1 to 5, The core tube insertion step involves moving the raw material roll, in which the rod-shaped member is inserted into the core tube, using the aforementioned moving means, and inserting the roll holding shaft into the core tube. After the core tube insertion step, the raw material roll pressing step is performed by moving the pressing member in the detachment direction using the drive device, thereby pressing the raw material roll. A method for mounting a raw material roll, comprising: after performing the raw material roll pressing step, moving the rod-shaped member into which the cylindrical member is inserted by the moving means toward the roll holding shaft while positioning it on the same axis as the roll holding shaft, thereby pressing the raw material roll through the cylindrical member.

7. The method for mounting a raw material roll according to claim 6, wherein the raw material roll pressing step includes the step of inserting the cylindrical member into the roll holding shaft using the moving means.

8. The method for mounting a raw material roll according to claim 6 or 7, further comprising a second raw material roll pressing step, in which, after performing the raw material roll pressing step, the pressing member is moved in the detachment direction by the drive device, thereby pressing the raw material roll through the cylindrical member.

9. The method for mounting a raw material roll according to any one of claims 6 to 8, wherein the core tube insertion step includes a step of moving the rod-shaped member while maintaining a non-contact state with the roll holding shaft.

10. The method for mounting a raw material roll according to claim 7, wherein the raw material roll pressing step includes a step of moving the rod-shaped member while maintaining a non-contact state with the roll holding shaft.

11. A method for manufacturing a sheet product using the raw material roll mounting system described in any one of claims 1 to 5, The core tube insertion step involves moving the raw material roll, in which the rod-shaped member is inserted into the core tube, using the aforementioned moving means, and inserting the roll holding shaft into the core tube. After the core tube insertion step, the raw material roll pressing step is performed by moving the pressing member in the detachment direction using the drive device, thereby pressing the raw material roll. A method for manufacturing a sheet product, comprising: after performing the raw material roll pressing step, a raw material roll pressing step in which the rod-shaped member into which the cylindrical member is inserted is moved toward the roll holding shaft by the moving means while being positioned on the same axis as the roll holding shaft, thereby pressing the raw material roll through the cylindrical member.

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