Sheet feeding apparatus and sheet feeding method

Abstract

To provide a sheet supply device and a sheet supply method capable of preventing supply of a defective sheet in which a connecting tape exists in an adhesive sheet.SOLUTION: The sheet supply device EA includes the feeding unit 10 configured to feed the raw sheet RS in which one surfaces of the plurality of adhesive sheet bases AB to be attached to the work WK are temporarily attached to the release liner RL and the other surfaces of the plurality of adhesive sheet bases AB are connected to each other via the connecting tape CT. The apparatus includes the cutting means 20 for forming the adhesive sheet AS inside the cut CU, the peeling means 30 for peeling off the adhesive sheet AS from the peeling sheet RL and supplying the adhesive sheet AS, and the detection means 40 for detecting the connecting tape CT for connecting the raw sheet RS, and the cutting means 20 forms the cut CU so that the connecting tape CT is not located inside the cut CU based on the detection result of the detection means 40.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a sheet feeding apparatus and a sheet feeding method. [Background technology]

[0002] A sheet supplying device is known that forms a closed-loop slit in an adhesive sheet substrate of a raw roll in which the adhesive sheet substrate is temporarily attached to a release sheet, and forms an adhesive sheet inside the slit (see, for example, Patent Document 1). Also known is a device in which multiple raw rolls are connected with connecting tape (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2020-68327 [Patent Document 2] Japanese Patent Application Laid-Open No. 2014-58373 Summary of the Invention [Problem to be solved by the invention]

[0004] In the sheet application device EA (sheet supply device) described in Patent Document 1, when forming a first sheet AS1 (adhesive sheet) from old and new long bodies RS2 and RS1 (raw material) connected by a connecting adhesive sheet SS (connecting tape) described in Patent Document 2, a defective sheet is formed in which the connecting tape is present in the adhesive sheet, and this defective sheet is then supplied and attached to the substrate, which is an inconvenience.

[0005] An object of the present invention is to provide a sheet feeding device and a sheet feeding method that can prevent feeding of defective sheets in which splicing tape is present on adhesive sheets. [Means for solving the problem]

[0006] The present invention employs the configurations described in the claims. [Effects of the Invention]

[0007] According to the present invention, the notch is formed based on the detection results of the detection means so that the connecting tape is not positioned inside the notch, thereby preventing the supply of defective sheets in which connecting tape is present on the adhesive sheet. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is an explanatory diagram of a sheet sticking device according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0009] An embodiment of the present invention will be described below with reference to FIG. In this embodiment, the X-axis, Y-axis, and Z-axis are orthogonal to each other, and the X-axis and Y-axis are axes within a predetermined plane, and the Z-axis is an axis orthogonal to the predetermined plane. Furthermore, in this embodiment, when viewed from the front of Figure 1(A) parallel to the Y-axis, "up" is the direction of the Z-axis arrow, "down" is the opposite direction, "left" is the direction of the X-axis arrow, "right" is the opposite direction, "front" is the direction of the Y-axis arrow, and "rear" is the opposite direction.

[0010] The sheet supplying device EA is equipped with: a feeding means 10 that performs a feeding step of feeding out a raw roll RS in which a plurality of adhesive sheet base materials AB are connected via connecting tape CT and temporarily attached to a release sheet RL; a cutting means 20 that performs a cutting step of forming a closed-loop slit CU in the adhesive sheet base material AB in the raw roll RS fed by the feeding means 10 and forming an adhesive sheet AS inside the slit CU; a peeling plate 30 as a peeling means that performs a peeling step of peeling the adhesive sheet AS from the release sheet RL and supplying the adhesive sheet AS; a detection means 40 that performs a detection step of detecting the connecting tape CT; and an adjustment means 50 that performs an adjustment step of adjusting the length of the raw roll RS from a detection position DP by the detection means 40 to a slit formation position CP by the cutting means 20 to a predetermined length; a pressure roller 60 that serves as a pressing means that presses the adhesive sheet base material AB against an adherend WK to adhere it; and a support means 70 that supports the adherend WK. In this embodiment, the raw roll RS is formed by previously joining a plurality of adhesive sheet base materials AB together via joining tapes CT.

[0011] The unwinding means 10 includes a support roller 11 that supports the raw roll RS, a guide roller 12 that guides the raw roll RS, a peeling roller 13 as a peeling member that folds back the unnecessary sheet US formed outside the slit CU and peels the unnecessary sheet US from the release sheet RL, a recovery roller 14 that is supported by the output shaft of a drive device not shown and that constantly applies a predetermined tension to the unnecessary sheet US present between it and the peeling roller 13 while the sheet application device EA1 is operating automatically, and serves as a recovery means for recovering the unnecessary sheet US, a drive roller 15 that is supported by the output shaft of a rotary motor 15A as a drive device not shown and that pinches the release sheet RL between it and a pinch roller 15B, and a recovery roller 16 that is supported by the output shaft of a drive device not shown and that constantly applies a predetermined tension to the release sheet RL present between it and the pinch roller 15B while the sheet application device EA1 is operating automatically, and serves as a recovery means for recovering the release sheet RL.

[0012] The cutting means 20 comprises a rotary motor 21 as a driving device, a die-cut roller 22 supported by the output shaft 21A of the rotary motor 21 and having a cutting blade 22A as a closed-loop cutting member on its circumferential surface, and a platen roller 23 that rotates synchronously with the die-cut roller 22, and is configured to form the cut CU so that the connecting tape CT is not positioned inside the cut CU based on the detection results of the detection means 40.

[0013] The detection means 40 is composed of imaging means such as a camera or projector, and various sensors such as optical sensors and ultrasonic sensors, and is capable of detecting the presence of the connecting tape CT and the width of the connecting tape CT in the direction of unwinding the original roll.

[0014] The adjustment means 50 includes a linear motor 51 as a driving device, and a guide roller 52 that is supported by a slider 51A of the linear motor 51 via a bracket 51B and that guides the raw web RS.

[0015] The support means 70 includes a linear motor 71 as a driving device, and a table 72 supported by a slider 71A of the linear motor 71 and having an adherend support surface 72A and a frame support surface 72B, each of which can be adsorbed and held by a pressure reduction means (holding means) such as a pressure reduction pump or a vacuum ejector (not shown).

[0016] The operation of the sheet sticking apparatus EA1 will now be described. 1(A), in which the components are arranged in the initial positions shown by the solid lines, a user of the sheet applicator EA1 (hereinafter simply referred to as "user") sets the raw web RS as shown in the figure, and then inputs the length of the adhesive sheet AS in the raw web payout direction into a control means (not shown) such as a personal computer or sequencer via an operation means (not shown) such as an operation panel or a personal computer, and also inputs a signal to start automatic operation. Next, the adjustment means 50 drives the linear motor 51 to move the guide roller 52 left and right, and adjusts the length of the raw web RS from the detection position DP where the detection means 40 detects the splicing tape CT to the incision formation position CP where the cutting means 20 forms the incision CU to a predetermined length, for example, 10 mm longer than the length of the adhesive sheet AS in the raw web payout direction. Thereafter, the payout means 10 and the cutting means 20 drive the rotary motors 15A and 21 to make incisions CU in the adhesive sheet base material AB while paying out the raw sheet RS, and as shown in Figure 1(A) , when the leading end of the leading adhesive sheet AS in the payout direction has been peeled off a predetermined length by the peeling edge 31 of the peeling plate 30, the driving of the rotary motors 15A and 21 is stopped. At this time, one or more subsequent adhesive sheets AS are formed behind the leading adhesive sheet AS in the payout direction.

[0017] 1(A), a user or a conveying means (not shown) such as an articulated robot or a belt conveyor places the adherend WK and the ring frame RF as a frame member at predetermined positions on the adherend support surface 72A and the frame support surface 72B, respectively, and the support means 70 then drives the pressure reducing means (not shown) to begin suction-holding the adherend WK and the ring frame RF on the adherend support surface 72A and the frame support surface 72B. Next, the support means 70 drives the linear motor 71 to move the table 72 to the left, and when the table 72 reaches a predetermined position, the feeding means 10 and the cutting means 20 drive the rotary motors 15A and 21 to form incisions CU in the adhesive sheet base material AB in accordance with the moving speed of the table 72, while feeding out the raw web RS. 1(A), the leading adhesive sheet AS is peeled off from the release sheet RL at the peeling edge 31 of the peeling plate 30, and the adhesive sheet AS peeled off from the release sheet RL is pressed against and stuck to the ring frame RF and adherend WK by the pressure roller 60. The entire leading adhesive sheet AS is then stuck to the ring frame RF and adherend WK to form a united object UP, and when the leading end of the next adhesive sheet AS following the leading adhesive sheet AS in the payout direction is peeled off a predetermined length by the peeling edge 31 of the peeling plate 30, the payout means 10 and the cutting means 20 stop driving the rotary motors 15A and 21. Next, when the table 72 supporting the united object UP moves out from under the pressure roller 60, the support means 70 stops driving the linear motor 71 and then stops driving the pressure-reducing means (not shown), thereby releasing the suction and holding of the adherend WK and ring frame RF on the adherend support surface 72A and frame support surface 72B. Then, when the user or a transport means (not shown) transports the integrated object UP to the next process, each means drives its respective driving device to return each member to its initial position, and the same operations as above are repeated thereafter.

[0018] While the above-described operations are repeated, the cutting means 20 forms the incision CU based on the detection results of the detection means 40 so that the connecting tape CT is not positioned inside the incision CU. That is, the length of the raw web RS from the detection position DP to the incision formation position CP is adjusted to a predetermined length by the adjustment means 50, so that the cutting means 20 can determine whether the connecting tape CT will be positioned inside the incision CU when forming the next incision CU. If the cutting means 20 determines that the connecting tape CT will not be positioned inside the incision CU, it does not perform any special operation (see FIG. 1B). On the other hand, if it determines that the connecting tape CT is positioned inside the incision CU, it does not perform the incision CU formation operation until the connecting tape CT passes the incision formation position CP (see FIGS. 1C and 1D).

[0019] According to the above embodiment, based on the detection results of the detection means 40, the notch CU is formed so that the connecting tape CT is not positioned inside the notch CU, thereby preventing the supply of defective sheets in which the connecting tape CT is present on the adhesive sheet AS.

[0020] As described above, the best configurations, methods, and the like for implementing the present invention have been disclosed in the above description, but the present invention is not limited thereto. That is, although the present invention has been particularly illustrated and described mainly with reference to specific embodiments, those skilled in the art can make various modifications to the above-described embodiments in terms of shape, material, quantity, and other detailed configurations without departing from the scope of the technical idea and purpose of the present invention. Furthermore, the above-disclosed descriptions limiting the shape, material, and the like are provided as examples to facilitate understanding of the present invention and are not intended to limit the present invention. Therefore, descriptions using names of components that are free from some or all of the limitations on shape, material, and the like are included in the present invention.

[0021] For example, the unwinding means 10 may support and guide the raw roll RS, release sheet RL, and unwanted sheets US using plate-like members or shaft members instead of rollers such as the support roller 11 and guide roller 12, or the raw roll RS may be supported by folding it, for example, in a fanfold manner, without being rolled up, or a recovery means may be adopted to recover the release sheet RL and unwanted sheets US by folding them in a fanfold manner without being rolled up, or by shredding them with a shredder or by piling them up randomly, or no recovery means may be adopted.

[0022] The cutting means 20 may employ a driving device that moves the die-cut roller 22 closer and further away from the adhesive sheet base material AB to form the incision CU, or may employ a driving device that moves a cutting member such as a cutting blade relative to the adhesive sheet base material AB in a direction perpendicular to the direction in which the original sheet is fed out, so that the incision CU is formed solely by the linear movement of the cutting member.

[0023] As shown in FIG. 1(A), the detection means 40 may be provided at a position facing the guide roller 12 across the raw web RS, or at a position not facing the guide roller 12. The detection means 40 may be provided at any position as long as the length of the raw web RS from the detection position DP to the incision formation position CP is equal to or greater than the length of the adhesive sheet AS in the raw web unwinding direction.

[0024] The adjustment means 50 may set the predetermined length of the raw web RS from the detection position DP to the incision formation position CP to, for example, the same as the length of the adhesive sheet AS in the raw web payout direction, or to 5 mm or 30 mm longer than the length of the adhesive sheet AS in the raw web payout direction, or may set the length to any length longer than the length of the adhesive sheet AS in the raw web payout direction, and the raw web RS may be guided by a plate-like member or a shaft member instead of the guide roller 52, and multiple adjustment means 50 may be provided, and may or may not be provided in the sheet supplying device EA or sheet application device EA1 of the present invention.If no adjustment means is provided, it is sufficient that the length of the raw web RS from the detection position DP to the incision formation position CP is equal to or longer than the length of the adhesive sheet AS in the raw web payout direction, and that length is known in advance.

[0025] The pressing means may apply the adhesive sheet AS to the adherend WK and the ring frame RF, or may apply the adhesive sheet AS only to the adherend WK, or may apply the adhesive sheet AS only to the ring frame RF as the adherend, and may or may not be provided in the sheet application apparatus EA1 of the present invention.If it is not provided, the adhesive sheet AS may be pressed against the adherend WK or the ring frame RF and applied using another device.

[0026] The support means 70 may or may not support the ring frame RF, and may or may not be provided in the sheet application apparatus EA1 of the present invention, and if it is not provided, the adherend WK and ring frame RF may be supported by another apparatus.

[0027] As shown in the diagram marked with AA in Fig. 1(A), the sheet supplying device EA and the sheet applying device EA1 may include a splicing means 80 that connects a plurality of adhesive sheet base materials AB via a splicing tape CT, and may connect a raw roll RS supported by a support roller 11 and a raw roll RS supported by a support roller 81 by the splicing means 80 and pay out by a payout means 10. As the splicing means 80, various means may be used, such as the connecting means 15 described in JP 2014-58333 A or the elongated body connecting device 10 described in JP 2018-87886 A. The sheet supply device EA and the sheet application device EA1 may have the size of the adhesive sheet AS input in advance to a control means not shown, or may employ a cutting blade detection means such as an imaging means such as a camera or a projector, or various sensors such as an optical sensor or an ultrasonic sensor, to detect the size of the cutting blade 22A and input it as the size of the adhesive sheet AS to the control means not shown. The sheet supply device EA and the sheet application device EA1 may be provided with a connecting tape passing means, equivalent to the adjustment means 50, downstream of the cutting means 20 in the raw roll payout direction, and may pull the raw roll RS in the raw roll payout direction while the rotary motors 15A and 21 are stopped, so that the connecting tape CT passes the incision formation position CP.

[0028] The raw roll RS may or may not be connected to the release sheet RL with a connecting tape (not shown). The connecting tape CT and the connecting tape (not shown) that connects the release sheet RL may have a width in the direction of unwinding the original roll that is longer than the normal spacing that forms the adhesive sheet AS, as shown in FIG. 1(D), and the adhesive sheet base material AB or the release sheet RL may be connected with one sheet or multiple sheets. When connecting with one sheet, the connecting may be made anywhere, such as the center in the width direction perpendicular to the direction of unwinding the original roll, or at one end or the other end. When connecting with multiple sheets, the connecting may be made anywhere, such as at the center in the width direction and at both ends, or at two places at both ends. The frame member may be a ring frame RF, but may also be non-annular (not connected at the outer periphery), circular, elliptical, polygonal, or other shape.

[0029] The materials, types, shapes, etc. of the adhesive sheet substrate AB, adhesive sheet AS, splicing tape CT, adherend WK, and frame member are not particularly limited. For example, the adhesive sheet substrate AB, adhesive sheet AS, splicing tape CT, adherend WK, and frame member may be circular, elliptical, polygonal (e.g., triangular or rectangular), or other shapes. The adhesive sheet substrate AB may be pressure-sensitive, heat-sensitive, or other adhesive. If a heat-sensitive adhesive sheet substrate AB is used, it may be bonded by an appropriate method, such as providing a heating means such as a suitable coil heater or heat pipe for heating the adhesive sheet AS. Furthermore, such adhesive sheet substrate AB may be, for example, a single-layer adhesive layer, one with an intermediate layer between the substrate and adhesive layer, or one with three or more layers, such as one with a cover layer on the top surface of the substrate. It may also be a so-called double-sided adhesive sheet in which the substrate can be peeled from the adhesive layer. The double-sided adhesive sheet may be a single-layer or multi-layer adhesive sheet with a single or multi-layer intermediate layer, or a single or multi-layer adhesive sheet without an intermediate layer. The adherend WK may be, for example, a single object such as food, a resin container, a semiconductor wafer such as a silicon semiconductor wafer or a compound semiconductor wafer, a circuit board, an information recording substrate such as an optical disk, a glass plate, a steel plate, a ceramic plate, a wooden board, or a resin, or may be a composite formed from two or more of these, and may also be any type of member or article. The adhesive sheet AS may be interpreted in terms of its function or use, and may refer to any sheet, film, tape, etc., such as an information label, a decorative label, a protective sheet, a dicing tape, a die attach film, a die bonding tape, or a recording layer-forming resin sheet.

[0030] The means and steps of the present invention are not limited in any way as long as they can perform the operations, functions, or steps described for those means and steps, and are in no way limited to the components and steps of a single embodiment shown in the above embodiment. For example, the peeling means may be any means capable of peeling the adhesive sheet from the release sheet and supplying the adhesive sheet, and is not limited in any way as long as it is within the scope of the common general technical knowledge at the time of filing (the same applies to other means and steps).

[0031] The driving device in the above-described embodiments may be an electric device such as a rotary motor, a linear motor, a single-axis robot, or an articulated robot with two or more joints, or an actuator such as an air cylinder, a hydraulic cylinder, a rodless cylinder, or a rotary cylinder, or may be a direct or indirect combination of these. In the above-described embodiments, when a rotating member such as a roller is used, a driving device for rotating the rotating member may be provided, the surface of the rotating member or the rotating member itself may be made of a deformable member such as rubber or resin, or the surface of the rotating member or the rotating member itself may be made of a non-deformable member, or other members such as a rotating or non-rotating shaft or blade may be used instead of the roller, and when a pressing means or pressing member such as a pressure roller or a pressure head that presses the object to be pressed is used, rollers, round rods, blade materials, brush-like members, or members that spray air or gas may be used instead of or in combination with those exemplified above, and the pressing means may be made of a deformable member such as rubber, resin, sponge, or may be made of a non-deformable member such as metal or resin, and when a peeling means or peeling member such as a peeling plate or peeling roller that peels the object to be peeled is used, In combination, members such as plate-shaped members, round bars, rollers, etc. may be used, and the peeling element may be made of a deformable material such as rubber or resin, or may be made of a non-deformable material. When a supporting (holding) means or a supporting (holding) member that supports (holds) the supported member (held member) is used, a configuration in which the supported member is supported (held) may be used, such as a gripping means such as a mechanical chuck or chuck cylinder, Coulomb force, adhesive (adhesive sheet, adhesive tape), pressure-sensitive adhesive (adhesive sheet, adhesive tape), magnetic force, Bernoulli adsorption, suction adsorption, driving equipment, etc. When a cutting means or cutting member that cuts the member to be cut or forms an incision or cutting line in the member to be cut is used, cutting elements such as a cutter blade, laser cutter, ion beam, fire, heat, water pressure, an electric heating wire, or spraying of gas or liquid may be used instead of or in combination with the above examples, or a cutting element may be moved and cut using a combination of appropriate driving equipment. [Explanation of symbols]

[0032] EA...Sheet supply device 10... Feeding means 20...Cutting means 30...Removal plate (removal means) 40...Detection means 50…Adjustment means 80...Connecting means AB...Adhesive sheet base material AS...Adhesive sheet CP…Cut formation position CT: Joining tape CU...cut DP: Detection position RL...Release sheet RS…Raw fabric WK...Adherend

Claims

1. a feeding means for feeding out a raw roll of a plurality of adhesive sheet substrates to be attached to an adherend, each of which has one surface temporarily attached to a release sheet and the other surface connected via a connecting tape; a cutting means for forming a closed-loop slit in the adhesive sheet base material of the raw web fed by the feeding means, and forming an adhesive sheet inside the slit; a peeling means for peeling the adhesive sheet from the release sheet and supplying the adhesive sheet; a detection means for detecting the splicing tape, The sheet supplying device according to claim 1, wherein the cutting means forms the notch so that the connecting tape is not positioned inside the notch, based on the detection result of the detection means.

2. a unwinding step of unwinding a roll of adhesive sheet substrates to be attached to an adherend, the roll having one surface temporarily attached to a release sheet and the other surface connected via a connecting tape; a cutting step of forming a closed-loop slit in the adhesive sheet base material of the raw web fed in the feeding step, and forming an adhesive sheet inside the slit; a peeling step of peeling the adhesive sheet from the release sheet and supplying the adhesive sheet; a detection step of detecting the splicing tape, The sheet supplying method is characterized in that in the cutting step, the notch is formed so that the connecting tape is not positioned inside the notch based on the detection result of the detection step.

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