Stopping device

Abstract

To provide a locking device to fix a winding core on a sheet winding shaft of a slitter, having a simple structure to allow the locking device to be attached regardless of the number or positions of locking members arranged on the winding shaft on which the locking device is attached and energize holding parts to fix the winding core on the locking device.SOLUTION: A locking device 1 to attach winding cores different in diameters on a winding shaft a is provided with: a locking device body 10 including a shaft hole to be fitted on the winding shaft a; a plurality of holding parts 40 designed on the locking device body 10 in its circumferential direction and moveable in the outward and inward direction from the shaft hole to the outer peripheral surface of the locking device body 10; and an elastic part 20 for pressing the holding parts 40 on the inner peripheral surface of the winding core, wherein the elastic part 20 is one piece of an annular leaf spring 20.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a locking device for fixing a core for winding a sheet in a slitter.

Background Art

[0002] There is a device called a slitter that winds a product sheet obtained by continuously cutting a continuous sheet-like long roll such as paper, film, or metal foil into an arbitrary longitudinal width while unwinding it.

[0003] The slitter includes a winding shaft that rotates around its axis, and a core formed in a cylindrical shape from paper, plastic, etc. is attached to the outer peripheral ring of the winding shaft, and the product sheet is wound with the core.

[0004] The core is fixed to the winding shaft by a locking member provided on the outer peripheral ring of the winding shaft. The locking member projects the locking member radially outward of the winding shaft by the pressure of air supplied from the outside to fix the core.

[0005] The core has the advantage that it is easier to wind because the variation in the pulling force between the start and end of winding the product sheet is smaller when the diameter is larger. Also, the core has the advantage that when the diameter is smaller, the winding distance can be increased, and it can be made more compact when winding the same distance.

[0006] Thus, cores used for winding product sheets are of various diameters depending on the type of sheet to be wound and customer requirements.

[0007] However, aligning winding shafts of various diameters according to various cores leads to an increase in cost. Therefore, there is a locking device used as an adapter attached to the winding shaft so that cores of various diameters can be attached (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0008] [Patent Document 1] Japanese Patent Publication No. 2017-171498 [Overview of the project] [Problems that the invention aims to solve]

[0009] In such a locking device, the protrusions of multiple locking members provided on the winding shaft for fixing the winding core to the winding shaft push the holding portion provided on the locking device radially outward, causing it to protrude from the outer circumference of the locking device.

[0010] Furthermore, the retaining portion protruding from the outer circumference of the locking device presses against the inner surface of the winding core, thereby fixing the locking device to the winding shaft and the winding core to the locking device.

[0011] Therefore, there was a challenge in manufacturing the locking device so that the number and position of the holding parts of the locking device matched the number and position of the locking members provided on the winding shaft to which the locking device is attached.

[0012] Furthermore, when attaching the locking device to the winding shaft, it was necessary to align the position of the retaining member on the locking device with the position of the locking member on the winding shaft, which presented the challenge of taking a considerable amount of time to attach the locking device to the winding shaft.

[0013] The present invention has been made in view of these problems, and aims to provide a locking device for fixing a winding core to a winding shaft of a sheet, which can be attached regardless of the number or position of locking members provided on the winding shaft to which the locking device is attached, and which has a simple structure for biasing the holding part for fixing the winding core. [Means for solving the problem]

[0014] The present invention has been made to solve at least some of the above-mentioned problems and can be realized in the following application examples.

[0015] The reference numerals and supplementary explanations in parentheses in this section are provided to aid in understanding the present invention and correspond to the embodiments described later; they do not limit the present invention in any way.

[0016] [Application Example 1] The invention described in Application Example 1 is, A locking device (1) for attaching winding cores of different diameters to a winding shaft (a), A locking device body (10) is provided with a shaft hole that fits into the winding shaft (a), Multiple retaining parts (40) are designed in the circumferential direction of the locking device body (10) and are movable in an inward and outward direction from the shaft hole toward the outer circumferential surface of the locking device body (10), The holding portion (40) is pressed against the inner circumferential surface of the winding core by an elastic portion (20), The gist of this invention is that the elastic portion (20) is a single annular leaf spring (20).

[0017] In such a locking device (1), multiple retaining parts (40) are arranged on the outside of the leaf spring (20) in the circumferential direction of the annularly wound leaf spring (20).

[0018] Multiple holding parts (40) are biased radially outward of the locking device (1) by the restoring force of the leaf spring (20) attempting to return to its original state, that is, the state before it was wound. They protrude from the outer surface of the locking device (1) and press against the inner surface of the winding core, which is mounted to fit onto the outer surface of the locking device (1), thereby fixing the winding core to the locking device (1).

[0019] In other words, it becomes unnecessary to provide one elastic part (20) for each holding part (40), and multiple holding parts (40) arranged in the circumferential direction of the locking device (1) can be simultaneously made to protrude from the outer circumference of the locking device (1) by a single elastic part (20).

[0020] As a result, the locking device (1) can be attached regardless of the number and position of the locking members (e) provided on the winding shaft (a) to which the locking device (1) is attached, and the locking device (1) can be easily attached to the core shaft.

[0021] [Application Example 2] The invention described in Application Example 2 is In the locking device (1) described in Application Example 1, the gist is that the leaf spring (20) is wound at least once.

[0022] In such a locking device (1), since a single leaf spring (20) is wound at least once, it is possible to uniformly apply a biasing force to all of the plurality of holding portions (40) provided on the outer circumferential side of the wound leaf spring (20).

Brief Description of the Drawings

[0023] [Figure 1] It is an external view showing a schematic shape of a winding shaft in a slitter. [Figure 2] It is an external view showing a schematic shape of a locking device. [Figure 3] It is an external view showing a schematic shape of a state where a leaf spring is wound around a locking device body. [Figure 4] It is an external view showing a schematic shape of a locking device cover. [Figure 5] It is an external view showing a schematic shape of a winding shaft when the locking device is used as a winding unit.

Embodiments for Carrying Out the Invention

[0024] Hereinafter, embodiments to which the present invention is applied will be described with reference to the drawings. Note that the embodiments of the present invention are not limited to the following embodiments, and various forms can be taken as long as they belong to the technical scope of the present invention.

[0025] [First Embodiment] Based on Figure 1, the configuration of the winding shaft 100 into which the locking device 1 is fitted will be described. Figure 1 is an external view showing the schematic appearance of the winding shaft 100 in a slitter.

[0026] As shown in Figure 1, the winding shaft 100 to which the locking device 1 according to this embodiment is attached is used in roll winding devices such as slitters, and multiple cylindrical winding units 102 fitted onto the outer circumference of a cylindrical shaft core 101 are mounted in a row along the axial direction of the shaft core 101.

[0027] The winding unit 102 is rotatably mounted to the cylinder block via a bearing and includes a locking member 103 that moves in and out of the outer ring. The winding core is mounted on the outside of the outer ring of the winding shaft 100 in a position where the locking member 103 of the winding unit 102 is retracted inward so that the amount of protrusion from the outer surface of the outer ring is reduced.

[0028] Then, the winding shaft 100 moves each of the multiple locking members 103 radially outward by air supplied through the shaft core 101 or by a biasing means such as a spring built into the winding unit 102, thereby pressing the tips of the locking members 103 against the inside of the winding core and fixing the winding core to the winding unit 102.

[0029] The locking device 1 according to this embodiment is used as an adapter to attach winding cores of different diameters to the winding shaft 100. It is fitted onto the outside of the outer ring of the winding unit 102 and attached to the winding shaft 100, and the winding core is attached to the outer circumference of the locking device 1.

[0030] The configuration of the locking device 1 will be described based on Figures 2, 3, and 4. Figure 2 is an external view showing the general shape of the locking device 1. Figure 3 is an external view showing the general shape of the locking device body with the leaf spring wound around it. Figure 4 is an external view showing the general shape of the locking device cover.

[0031] As shown in Figure 2, the locking device 1 comprises a locking device body 10, a leaf spring 20, a locking device cover 30, and a holding part 40.

[0032] As shown in Figure 3, the locking device body 10 has a short cylindrical shape and is provided with an axial hole 11 in the center of its inner front surface into which the outer ring of the winding unit 102 fits. It also has a recessed portion 12 around its entire outer surface. The locking device body 10 is formed from a material such as plastic or metal.

[0033] The axial width of the locking device body 10 is formed to match the width of the winding unit 102 to which it is attached, and the axial width of the locking device body 10 in the recessed portion 12 is formed to be equal to or slightly larger than the width of the leaf spring 20, which will be described later.

[0034] The outer circumferential surface of the locking device body 10 is provided with six body protrusions 13 at evenly spaced positions in the circumferential direction on two outer circumferential surfaces that sandwich the recessed portion 12.

[0035] The leaf spring 20 is used to bias the retaining portion 40, which will be described later, radially outward from the locking device 1, and is formed using materials such as spring stainless steel or special steel (carbon steel, carbon tool steel).

[0036] The width of the leaf spring 20 is formed to be equal to or slightly smaller than the width of the recessed portion 12 of the locking device body 10, and its length is formed to be long enough to be wound around the recessed portion 12 at least once.

[0037] As shown in Figure 4, the locking device cover 30 has a short cylindrical shape, and its inner diameter is formed in a circular shape that matches the outer diameter of the locking device body 10, allowing the locking device body 10 to be fitted into it.

[0038] Furthermore, the outer diameter is formed to match the circular inner surface of the cylindrical winding core that is attached to the locking device 1. Also, the axial length of the short cylindrical shape is formed to match the width of the winding unit 102 to which it is attached.

[0039] The short cylindrical side surface of the locking device cover 30 is provided with six notches 31 spaced equally in the circumferential direction. The notches 31 are formed to penetrate the outer and inner circumferential surfaces of the locking device cover 30, and are open only at one end face in the axial direction of the locking device cover 30.

[0040] The shape of the notch 31 is such that it is formed with a width parallel to the axial direction of the locking device cover 30, and with respect to the radial direction of the locking device cover 30, the width of the notch 31 narrows towards the radially outward direction.

[0041] In other words, the minimum width of the radial notch 31, i.e., the width of the notch 31 on the outer circumferential surface of the locking device cover 30, is formed to be slightly smaller than the diameter of the retaining portion 40, thereby restricting the retaining portion 40 from moving through the notch 31 from the inner circumferential surface side to the outer circumferential surface side of the locking device cover 30.

[0042] Furthermore, the radial thickness of the locking device cover 30 is formed to be smaller than the diameter of the retaining portion 40, which will be described later. However, the radial thickness of the locking device cover 30 in the circumferential direction, excluding the area around the notch 31, is formed to be thinner than the thickness around the notch 31.

[0043] Specifically, on the inner circumferential surface of the locking device cover 30, one cover protrusion 32 is formed on each of the six notches 31 in the inner circumferential direction, resulting in a total of 12 cover protrusions 32. The locking device cover 30 is formed using materials such as plastic or metal.

[0044] The retaining portion 40 is formed from a material such as plastic or metal and has a cylindrical shape. The retaining portion 40 is installed in each of the six notches 31 provided in the locking device cover 30, and the axial length of the retaining portion 40 is formed to be equal to or slightly smaller than the axial length of the notch 31 of the locking device cover 30.

[0045] Furthermore, it is formed to be smaller than the circumferential width of the notch 31 on the outer surface of the locking device cover 30.

[0046] (How to use locking device 1) Next, we will explain how to use the locking device 1. The procedure for using the locking device 1 is as shown in (a) to (e) below. (a) A retaining part 40 is installed in each of the six notches 31 of the locking device cover 30. (i) Wrap the leaf spring 20 around the recessed portion 12 of the locking device body 10.

[0047] (c) While maintaining the state in which the leaf spring 20 is wrapped around the recessed portion 12 of the locking device body 10, the locking device body 10 is fitted onto the inner circumferential surface of the locking device cover 30, and the locking device 1 is assembled. (e) The assembled locking device 1 is fitted onto the outer ring of the winding unit 102. (o) The core is fitted onto the outer surface of the locking device cover 30 that constitutes the locking device 1.

[0048] (Features of Locking Device 1) In this type of locking device 1, the locking device body, in which a leaf spring 20 is wound around a recessed portion 12, is fitted into a locking device cover 30 in which retaining portions 40 are installed in all the notches 31, so that multiple retaining portions 40 are located on the outside of the wound leaf spring 20.

[0049] As a result, a restoring force acts radially outward on the locking device 1, causing the leaf spring 20 to return to its original state, that is, to the state before it was wound. Consequently, this force pushes the retaining portion 40, which is installed on the outside of the wound leaf spring 20, radially outward on the locking device cover 30, moving it to a position where it protrudes from the outer circumference of the locking device body.

[0050] At this time, the width of the notch 31 in the circumferential direction of the locking device cover 30 is formed to be smaller than the diameter of the holding portion 40, so that when the holding portion 40 moves radially around the locking device cover 30, the holding portion 40 does not protrude from the locking device cover 30.

[0051] In this way, the restoring force of the leaf spring 20 wound around the locking device body 10 biases the retaining portion 40, which is installed in the notches 31 provided at even positions around the entire circumference of the locking device cover 30, radially outward. By protruding from the outer circumferential surface of the locking device cover 30, it presses against the inner circumferential surface of the winding core fitted onto the outer circumferential surface of the locking device cover 30, thereby fixing the winding core to the locking device cover 30.

[0052] Furthermore, due to interference between the body projection 13 provided on the outer circumferential surface of the locking device body 10 and the cover projections 32 provided on the left and right sides in the circumferential direction of the notch 31 of the locking device cover 30, the locking device cover 30 rotates as the locking device body 10 rotates.

[0053] Furthermore, the inner surface of the locking device body 10, which is fitted onto the outer ring of the winding unit 102, is pressed down by the locking member 103 provided on the winding unit 102, thereby fixing the locking device body 10 to the winding unit 102. As a result, the locking device 1 and the winding core are fixed to the winding unit 102, and the winding core rotates along with the rotation of the winding unit 102.

[0054] In this way, the locking device 1 can be attached regardless of the number or position of locking members provided on the winding unit 102 to which the locking device 1 is attached. Furthermore, it is not necessary to use a biasing means for each of the multiple holding parts 40 in order to bias the holding part 40 for fixing the winding core to the locking device 1. All of the holding parts 40 can be biased with a single leaf spring 20, resulting in a simple structure.

[0055] [Second Embodiment] Based on Figure 5, the case in which the locking device 1 is used as the winding unit 102 in a slitter will be explained. Figure 5 is an external view showing the schematic shape of the winding shaft when the locking device 1 is used as the winding unit.

[0056] In the second embodiment, the locking device is used as the winding unit 102, whereas in the first embodiment, the locking device 1 is used as an adapter for fixing the winding core to the winding unit 102. Since its configuration and structure are the same, a description of each part is omitted. Furthermore, the method of use is the same as in the first embodiment, so a description of how to use the locking device in the second embodiment is omitted.

[0057] As shown in Figure 5, in the second embodiment, the locking device uses the locking device 1 as a winding unit 102, and multiple units are mounted in a row along the axial direction of the shaft center 101.

[0058] In conventional winding units 102, a complex and large-scale mechanism was required to fix the winding core, which involved using the force of air supplied through the shaft portion 101 to cause a locking member 103, provided on the outer surface of the winding unit 102, to protrude from the outer surface of the winding unit.

[0059] However, in the second embodiment, by using the locking device 1 in the first embodiment as a winding unit 102, the winding core can be fixed, and with a simple configuration of a single leaf spring 20, multiple holding parts 40 can be made to protrude from the outer surface of the locking device 1, thereby fixing the winding core to the winding shaft 100.

[0060] [Other embodiments] (1) In the above embodiment, the number of notches 31 in the locking device cover 30 and the number of holding parts 40 are set to 6, but they may be 6 or less or 6 or more. Also, the positions of the notches 31 do not need to be evenly spaced in the outer circumference direction of the locking device cover 30, and they may be in an uneven positional relationship. [Explanation of Symbols]

[0061] 1... Locking device 10... Locking device body 11... Shaft hole 12... Recessed part 13... Body protrusion 20... Leaf spring 30... Locking device cover 31... Notch 32... Cover protrusion 40... Holding part 100... Winding shaft 101... Shaft center part 102... Winding unit 103... Locking member

Claims

1. A locking device for attaching winding cores of different diameters to a winding shaft, A locking device body having a shaft hole for fitting onto the winding shaft, Multiple retaining parts are designed in the circumferential direction of the locking device body and are movable in an inward and outward direction from the shaft hole toward the outer circumferential surface of the locking device body, The holding portion includes an elastic portion that presses against the inner circumferential surface of the winding core, It comprises a cylindrical cover into which the locking device body is fitted, The cover has a plurality of spaces that penetrate in the inward and outward directions. The holding portion is arranged in the plurality of spaces, A locking device characterized in that the elastic part is a single annular leaf spring.

2. In the locking device according to claim 1, A locking device characterized in that the leaf spring is wound at least once.

Images