Roll body support apparatus

Abstract

To provide a roll body support apparatus which can suppress the generation of the slippage of a roll body relative to a chuck body upon conveying a conveyance material.SOLUTION: A roll body support apparatus according to the present disclosure is a roll body support apparatus 1 for rotatably supporting a roll body R in which a conveyance material R1 is wound around a core material R2 having a hollow part, and comprises: a support shaft 10 inserted into the hollow part; a chuck 20 installed in the outer circumferential face of the support shaft 10 and expandable / reducible in the radial direction of the support shaft 10; and a projecting part 30 projected from the outer circumferential face of the chuck 20 to the radial direction of the support shaft 10. The projecting part 30 bites into the core material R2 by the diameter expansion of the chuck 20 to rotatably grip the core material R2.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a roll body support device. [Background technology]

[0002] There are devices that support a roll on which a material to be conveyed, such as film or paper, is wound in order to convey the material to be conveyed. For example, Patent Document 1 discloses a roll support device in which a holding shaft equipped with a chuck is inserted into the hollow portion of the roll, and the chuck grips the roll from the inner diameter side. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2015 / 162746 Summary of the Invention [Problem to be solved by the invention]

[0004] The inventors have found the following problem with the roll support device disclosed in Patent Document 1. The roll support device conveys the material while applying tension to the material. If the gripping force of the chuck on the roll is insufficient, the roll will slip relative to the chuck. On the other hand, if the gripping force of the chuck is excessive, the roll may be deformed or problems may occur during conveyance.

[0005] The present disclosure has been made to solve such problems, and provides a roll body support device that can suppress the occurrence of slippage of the roll body relative to the chuck when transporting a material to be transported. [Means for solving the problem]

[0006] The roll body support device of the present disclosure is a roll body support device that rotatably supports a roll body in which a transport material is wound around a core material having a hollow portion, and includes a support shaft that is inserted into the hollow portion, a chuck that is installed on the outer peripheral surface of the support shaft and can expand and contract in the radial direction of the support shaft, and a protrusion that protrudes from the outer peripheral surface of the chuck in the radial direction of the support shaft, and the protrusion bites into the core material as the chuck expands, rotatably gripping the core material. [Effects of the Invention]

[0007] The present disclosure provides a roll body support device that can prevent the roll body from slipping relative to the chuck when the material to be conveyed is being conveyed. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is an explanatory diagram of a roll body support device according to the present disclosure. [Figure 2] FIG. 2 is an explanatory diagram showing a state in which a roll is placed on a roll support device according to the present disclosure. [Figure 3] FIG. 3 is an explanatory diagram showing a state in which a roll is placed in the roll support device according to the present disclosure and a material is being transported. DETAILED DESCRIPTION OF THE INVENTION

[0009] The present invention will be described below through embodiments of the invention, but the invention according to the claims is not limited to the following embodiments. Furthermore, not all of the configurations described in the embodiments are necessarily essential means for solving the problems. For clarity of explanation, the following description and drawings have been omitted and simplified as appropriate. In each drawing, the same elements are given the same reference numerals, and repeated explanations are omitted as necessary.

[0010] Embodiment 1 <Roll body support device> The configuration of a roll body support device according to the present disclosure will be described with reference to Figures 1 to 3. Figure 1 is an explanatory diagram of a roll body support device according to the present disclosure. Figure 2 is an explanatory diagram of a state in which a roll body is installed in the roll body support device according to the present disclosure. Figure 3 is an explanatory diagram of a state in which a roll body is installed in the roll body support device according to the present disclosure and a material to be transported is being transported.

[0011] As shown in Fig. 1, the roll body support device 1 includes a support shaft 10, a chuck 20, and a protrusion 30. As shown in Figs. 2 and 3, the roll body support device 1 is a device that rotatably supports the roll body R.

[0012] The roll R comprises a carrier material R1 and a core material R2. The carrier material R1 is a sheet-like or film-like member. The roll support device 1 can obtain an electrode sheet, for example, by transferring electrodes or the like onto the carrier material R1. The core material R2 has a hollow portion at the center. The roll R is formed by winding the carrier material R1 around the core material R2.

[0013] The support shaft 10 rotatably supports the roll R. The support shaft 10 is formed with a diameter smaller than the inner diameter of the core material R2. The support shaft 10 is fixed to a housing (not shown) of the roll support device 1, for example, in a cantilevered or double-sided state. The roll R is installed in the roll support device 1 by inserting the support shaft 10 into the hollow portion of the core material R2. The support shaft 10 is connected to a drive source such as a motor (not shown), and rotates at a predetermined rotational speed and torque. Then, as the support shaft 10 rotates, the roll R also rotates, and the roll support device 1 transports the material R1 to be transported.

[0014] One or more chucks 20 are installed on the outer peripheral surface of the support shaft 10. The chucks 20 are driven so as to be expandable and contractible in the radial direction of the support shaft 10. When the chucks 20 expand in diameter, they move in a direction approaching the inner peripheral surface of the core material R2. On the other hand, when the chucks 20 contract in diameter, they move in a direction away from the inner peripheral surface of the core material R2.

[0015] When the support shaft 10 is inserted into the hollow portion of the core material R2, the chuck 20 contracts in diameter. After the roll body R is placed on the roll body support device 1, the chuck 20 expands in diameter to grip the roll body R from the inner diameter side.

[0016] There is no particular limitation on the method of driving the chuck 20. The method of driving the chuck 20 may be, for example, hydraulic, pneumatic, or electric. There is also no particular limitation on the material of the chuck 20. The chuck 20 may be made of, for example, an alloy steel for mechanical structures, carbon steel, or an aluminum alloy.

[0017] Here, we will explain the transportation of the material R1 to be transported by the roll body support device 1. The roll body support device 1 transports the material R1 while applying tension to it. As shown in Figure 3, the roll body support device 1 applies tension to the material R1 to be transported by rotating the support shaft 10 in a predetermined rotation direction with a predetermined torque. During transportation, in order to apply appropriate tension to the material R1 to be transported, the chuck 20 needs to grip the roll R with a gripping force that is sufficient to prevent the roll R from slipping relative to the chuck 20.

[0018] A method for setting the gripping force of the chuck 20 on the roll R will be described. First, the torque required to rotate the support shaft 10 is calculated from the outer diameter of the roll R and the tension that needs to be applied to the material R1 to be transported. Next, the frictional force of the chuck 20 on the core material R2 is calculated to the extent that the roll R does not slip on the chuck 20 even when this torque is applied. Then, the gripping force of the chuck 20 that can apply this frictional force is set.

[0019] Here, as the outer diameter of the roll body increases, the required torque also increases. Accordingly, the frictional force of the chuck 20 against the core material R2 must also increase. However, if the gripping force of the chuck 20 is excessive, there is a risk of deformation of the roll body R or problems with transportation. More specifically, for example, the core material R2 may be unable to withstand the excessive gripping force of the chuck 20 and may deform. Furthermore, this deformation may apply localized stress to the transported material R1, resulting in problems such as the inability to transfer the electrode material to the transported material R1 in the correct pattern.

[0020] Therefore, in the present disclosure, a protrusion 30 is further provided on the roll body support device 1. This allows the roll body support device 1 to increase the frictional force of the chuck 20 with respect to the core material R2 without applying excessive gripping force to the roll body R. Therefore, slippage of the roll body R with respect to the chuck 20 can be suppressed.

[0021] The protrusion 30 is disposed so as to protrude from the outer peripheral surface of the chuck 20 in the radial direction of the support shaft 10. The material of the protrusion 30 is not particularly limited. For example, the protrusion 30 may be made of a metal or a resin material. The shape of the protrusion 30 is also not particularly limited. As shown in FIG. 2, the protrusion 30 tapers toward the tip in this embodiment, but may have a rounded tip or a flat tip, for example.

[0022] As shown in FIG. 2, when the support shaft 10 is inserted into the hollow portion of the core R2, the chuck 20 is contracted in diameter. At this time, it is preferable that the protrusion 30 is stored inside the outer diameter of the support shaft 10. This prevents damage to the core R2 due to contact with the protrusion 30 when the support shaft 10 is inserted into the roll R. Then, as shown in FIG. 3, after the roll R is placed on the roll support device 1, the chuck 20 expands in diameter. As the chuck 20 expands in diameter, the protrusion 30 is pressed against the core R2 and bites into it. The amount by which the protrusion 30 bites into the core R2 is not particularly limited. For example, a portion of the protrusion 30 or the entire protrusion 30 may bite into the core R2.

[0023] In this way, the protrusions 30 bite into the core material R2, thereby increasing the frictional force of the chuck 20 against the core material R2. Therefore, even if the diameter of the roll R increases and it becomes necessary to increase the torque, the protrusions 30 bite into the core material R2, thereby increasing the frictional force of the chuck 20 against the core material R2 without applying excessive gripping force. Therefore, the roll support device 1 can suppress slippage of the roll R against the chuck 20 even when the torque is increased.

[0024] As described above, according to the roll support device of the present disclosure, the protrusions 30 dig into the core R2, thereby increasing the frictional force of the chuck 20 against the core R2 without applying excessive gripping force. This makes it possible to prevent the roll R from slipping against the chuck 20 when the material R1 is being transported.

[0025] The present invention is not limited to the above-described embodiment, and can be modified as appropriate within the scope of the invention.

[0026] For example, the number of protrusions 30 provided on one chuck 20 is not limited to one, and may be multiple. Increasing the number of protrusions 30 can further increase the frictional force of the chuck 20 against the core material R2. Furthermore, it is not necessary for all of the multiple protrusions 30 to have the same shape or size, and the frictional force may be controlled by combining protrusions 30 of various shapes and sizes. [Explanation of symbols]

[0027] 1. Roll support device 10 Support shaft 20. Chuck 30 Protrusion R roll body R1 Transport material R2 core material

Claims

[Claim 1] A roll body support device that rotatably supports a roll body in which a conveying material is wound around a core material having a hollow portion, a support shaft inserted into the hollow portion; a chuck that is installed on the outer peripheral surface of the support shaft and is expandable and contractible in the radial direction of the support shaft; a protrusion protruding from an outer peripheral surface of the chuck in a radial direction of the support shaft, The protrusion bites into the core material by expanding the diameter of the chuck, and rotatably grips the core material. Roll body support device.

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