JP4420953B2 - Folding part forming device for adhesive tape - Google Patents

Description

  The present invention relates to a technique for facilitating peeling of an adhesive tape from an adherend.

Cellophane used for the exterior of bouquets, glass surfaces such as window glass and showcases, and adhesive tape affixed to cardboard and other objects to be adhered can be found on the edge of the object because it adheres to the object to be adhered. There was a problem that it was very difficult and difficult to peel off. For this reason, as described in Japanese Patent No. 3549512 (Patent Document 1), the present applicant can fold at least one end in the width direction of the pressure-sensitive adhesive tape with a simple and compact mechanism to remove from the adherend. A device for forming a folded portion of an adhesive tape that facilitated peeling was proposed. The tape folding mechanism is a folding roller in which the adhesive surface of the adhesive tape is wound so that at least one end portion of the adhesive tape stretched between the two guide rollers extends, and the protruding portion is folded in the direction of the adhesive surface. And a folding guide that comes into contact with the overhanging portion of the adhesive tape folded thereby, and further folds the overhanging portion in the adhesive surface direction to form a folded portion in which the adhesive surfaces are bonded together. The
Japanese Patent No. 3549512

  However, in the conventionally proposed folded portion forming apparatus, when the adhesive tape is attached to the tape folding mechanism, the adhesive tape must be appropriately wound around the two guide rollers and the folding roller that are disposed in proximity to each other. It was time consuming and annoying. For this reason, in the operation | work which uses an adhesive tape in large quantities, there exists a possibility that replacement | exchange of an adhesive tape will take time and work efficiency may fall somewhat.

  Accordingly, in view of the above-described conventional problems, the present invention has an object to provide an adhesive tape folding part forming device that allows an adhesive tape to be attached to a tape folding mechanism with a single touch and that facilitates the replacement. To do.

  For this reason, in the present invention, the base surface of the pressure-sensitive adhesive tape is wrapped around the part of both side surfaces of the pressure-sensitive adhesive tape wound around the winding core to restrict the movement in the width direction. A first guide roller that is fed, a second guide roller on which a base material surface of the adhesive tape that has been fed by the first guide roller is wound, and an adhesive that is stretched between the first guide roller and the second guide roller An adhesive surface of the adhesive tape is wound so that one end portion or both end portions of the tape are overhanged, and a bending roller that bends the protruding portion in the direction of the adhesive surface, and an adhesive tape that is bent by the bending roller. A folding part forming device for an adhesive tape, comprising: a folding guide that contacts the projecting part and further folds the projecting part in the adhesive surface direction to form a folded part in which the adhesive surfaces are bonded together. The folding roller is spaced from the adhesive surface of the adhesive tape stretched between the first guide roller and the second guide roller, and a closed position where the protruding portion of the adhesive tape is bent in the direction of the adhesive surface. The adhesive tape is wound around the folding roller using a force when the folding roller is displaced from the open position to the closed position. An introduction portion that leads to the folding guide while bending one end portion or both end portions of the first and second end portions is integrally formed.

  According to the present invention, the pressure-sensitive adhesive tape wound around the winding core is fed out to the second guide roller with its free end being fed while its base material surface is wound around the first guide roller. The adhesive tape stretched between the first guide roller and the second guide roller is wrapped around the folding roller so that at least one end of the adhesive tape projects, and the protruding portion is bent in the direction of the adhesive surface. It is done. As the free end of the folded adhesive tape is extended, the folded portion comes into contact with the folding guide and is further folded in the direction of the adhesive surface to form a folded portion where the adhesive surfaces are bonded together. For this reason, since the folding | returning part is formed using the force which pays out the free end of an adhesive tape, it can be set as the robust and compact folding | returning part formation apparatus which does not require a power source. Moreover, since the movement of the adhesive tape in the width direction is restricted by the first guide roller, the width of the folded portion can be made substantially constant.

  And when attaching an adhesive tape to a folding | returning part formation apparatus, the adhesive surface of the adhesive tape stretched between a 1st guide roller and a 2nd guide roller by displacing a folding roller from a closed position to an open position Since the folding roller is separated from the first and second guide rollers, the work of winding the adhesive tape around the first guide roller, the second guide roller and the folding roller is facilitated. On the other hand, using the force when the folding roller is displaced from the open position to the closed position, the adhesive tape wound around the folding roller is folded into the folding guide by the introduction part integrally formed with the folding guide. It is guided. For this reason, mounting | wearing and replacement | exchange of the adhesive tape to a folding | returning part formation apparatus can be performed easily.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows the basic principle of a method for forming a folded portion of an adhesive tape.
The adhesive surface of the adhesive tape D wound around the winding core is wound around the bending roller C disposed between the two guide rollers A and B so as to project a predetermined dimension from its end. In this state, when the free end of the adhesive tape D is extended and tension is applied to the adhesive tape D by the two guide rollers A and B, the adhesive tape D is pressed in the direction of the bending roller C. Then, the protruding portion of the adhesive tape D protruding from the bending roller C is bent in the adhesive surface direction by the corner portion of the bending roller C. Then, if the adhesive tape D is further folded by the folding guide E that contacts the protruding portion of the folded adhesive tape D by using the force that draws the free end of the adhesive tape D, the adhesive surfaces are adhered to each other. Together with each other, as shown in FIG. 5B, a folded portion F that does not contribute to adhesion is formed at the end in the width direction. In this case, when the pressure-sensitive adhesive tape D is peeled from the adherend, since the end is easily found by the folded portion F, the pressure-sensitive adhesive tape D can be easily peeled off.

Next, a basic configuration of an adhesive tape folded part forming apparatus (hereinafter referred to as “folded part forming apparatus”) that embodies this basic principle and forms a folded part at least at one end in the width direction of the adhesive tape will be described.
As shown in FIG. 2, a shaft member 12, a first guide roller 14, and a second guide roller 16 extending in the thickness direction are fixed to a base member 10 made of a substantially L-shaped thin plate. The shaft member 12 has a cylindrical shape that can be fitted into the groove portion of the adhesive tape dispenser, and is penetrated and fixed so that the base end portion protrudes from the back surface (surface not shown) of the base member 10 by a predetermined dimension. The first guide roller 14 is a stepped cylinder in which a small diameter portion is formed at an intermediate portion so as to sandwich a part of both side surfaces on the outer peripheral side of the adhesive tape 18 wound around a winding core and restrict movement in the width direction. It has a shape and is fixed at a position away from the shaft member 12 by a predetermined dimension (less than the radius of the adhesive tape 18). The second guide roller 16 has a cylindrical shape with a uniform cross section, and is fixed to the opposite side of the shaft member 12 with the first guide roller 14 interposed therebetween.

  A bending roller 20 extending in the plate thickness direction of the base member 10 is fixed between the first guide roller 14 and the second guide roller 16. That is, on the back surface of the base member 10, a rotating member 24 made of a thin plate that opens and closes to the position shown in FIG. And the bending roller 20 is comprised by fixing the cylindrical member 20B to the front-end | tip part of the rotation member 24 via the rod member 20A. Here, the base member 10 is formed with a notch 10A extending along an arc centered on the rotation center 22 so as to avoid interference with the rod member 20A of the bending roller 20 when the rotation member 24 is opened and closed. The The cylindrical member 20B of the bending roller 20 is such that when the adhesive surface of the adhesive tape 18 is wound around the cylindrical member 20B, the adhesive tape 18 protrudes from the both end portions by a length corresponding to the width of the folded portion. The full length and the fixing position with respect to the rod member 20A are determined.

  As shown in FIG. 4, as shown in FIG. A slide member 26 that slides along a line segment connecting the shaft member 12 and the first guide roller 14 is disposed. The slide member 26 has a substantially rectangular shape made of a thin plate, and an operation knob 26 </ b> A for sliding is formed at a position protruding from the base member 10. Engaging claws 24 </ b> A and 26 </ b> B that engage with each other at the closed position of the rotating member 24 are formed at the distal end portion of the rotating member 24 and one end portion in the longitudinal direction of the slide member 26. Further, the slide member 26 is constantly urged in the direction of the rotation member 24 by an elastic member 28 such as a spring in order to ensure engagement with the rotation member 24. Note that at least one of the engaging claws 24A and 26B of the rotating member 24 and the slide member 26 resists the biasing force of the elastic member 28 by using the force when the rotating member 24 rotates to the closed position. Then, it is desirable to form the inclined surfaces 24B and 26C for sliding the slide member 26 in the direction away from the rotating member 24.

  On the other hand, as a mechanism for holding the rotating member 24 in the open position, that is, in the open position separated from the adhesive surface of the adhesive tape 18 stretched between the first guide roller 14 and the second guide roller 16, FIG. As shown to (A), while the intermediate part is wound by the base end part of the shaft member 12 on the back surface of the base member 10, one end part is fixed to the base member 10, and the other end part rotates. A linear spring 30 fixed to the tip of the member 24 is disposed. The other end of the spring 30 is movably fixed to a long hole 24 </ b> C extending along the longitudinal direction of the rotating member 24, as shown in FIG. When the rotating member 24 is opened from the closed position to the open position, the other end portion of the spring 30 strikes against the end face of the elongated hole 24C, so that the shock can be reduced while defining the open position.

  Further, the second guide roller 16 is in contact with the protruding portion of the adhesive tape 18 bent by the bending roller 20, and further folded the adhesive tape 18 in the direction of the adhesive surface and bonded the adhesive surfaces together. The folding guide 32 is fixed. As shown in FIG. 6, the folding guide 32 sandwiches the guide portion 32 </ b> A made of a substantially U-shaped thin plate that opens in the direction in which the rotating member 24 opens, and both axial ends of the second guide roller 16. A pair of fixing portions 32B for fixing at the same time and a pair of introduction portions 32C that lead to the guide portion 32A while bending both end portions in the width direction when the adhesive tape 18 is attached are integrally formed. The guide portion 32 </ b> A is formed with an inclined surface in which the member interval gradually increases from the opening portion toward the back portion so as to come into contact with the protruding portion of the adhesive tape 18. The pair of introduction parts 32C are connected to the opening part side end part of the guide part 32A toward the opening position direction of the rotating member 24, and have an inclined surface in which the member interval gradually increases as the distance from the opening part increases. It has a triangular shape.

  In addition, as a holding mechanism for holding the adhesive tape 18 in a predetermined position, as shown in FIG. 7, the base member 10 sandwiches part of both side surfaces on the inner peripheral side of the adhesive tape 18 to restrict movement in the width direction. A stepped cylindrical holding roller 34 and a linear spring 36 that urges the adhesive tape 18 in the direction of the first guide roller 14 and the holding roller 34 (in the direction of the arrow in the figure) are provided. . Specifically, the spring 36 is fitted and fixed in a circumferential groove formed in the base end portion of the shaft member 12 on the surface of the base member 10.

  The first guide roller 14, the second guide roller 16, the bending roller 20, and the holding roller 34 are desirably fixed to the base member 10 or the rotating member 24 so as to be freely rotatable. If it does in this way, the contact resistance in the paying-out of the adhesive tape 18 will reduce, and it will become possible to pay out the adhesive tape 18 with little force. Further, on the outer peripheral surface of the cylindrical member 20B of the bending roller 20, a protruding portion extending in the circumferential direction is formed so as to reduce the adhesive force by reducing the contact area with the adhesive tape 18 and further reduce the force required for the feeding. A plurality of may be formed.

  In order to attach the adhesive tape 18 to the folded portion forming apparatus, the operation knob 26A of the slide member 26 is pushed with a fingertip, and the slide member 26 is slid against the urging force of the elastic member 28. Then, the engagement of the rotation member 24 and the slide member 26 is released, and the rotation member 24 is automatically rotated from the closed position to the open position as shown in FIG. open. At this time, when the rotating member 24 is rotated to the open position, the tip of the spring 30 hits and stretches against the end surface of the elongated hole 24C of the rotating member 24, so that the shock can be reduced while defining the open position. . In this state, a part of the adhesive tape 18 is positioned between the shaft member 12 and the holding roller 34 and the first guide roller 14, and the spring 36 is deformed so that the tip portion thereof becomes the inner peripheral surface of the adhesive tape 18. Hook and hold the adhesive tape 18 in place.

  Next, the free end of the adhesive tape 18 is fed out and guided to the outside from the second guide roller 16 while the base material surface is wound around the first guide roller 14 as shown in FIG. Then, against the urging force of the spring 30, as shown in FIG. 8, the tip of the rotating member 24 is pushed toward the closed position with the fingertip and closed. At this time, the slide member 26 automatically slides against the urging force of the elastic member 28 by the inclined surfaces 24B and 26C formed on the engaging claws 24A and 26B of the rotation member 24 and the slide member 26, and rotates. When the moving member 24 rotates to the closed position, the slide member 26 slides by the urging force of the elastic member 28, and the engaging claws 24A and 26B engage with each other. Further, the adhesive tape 18 is pressed toward the folding guide 32 through the folding roller 20 by using a force that rotates the rotating member 24 to the closed position. At this time, both ends of the adhesive tape 18 are led to the guide portion 32A while being bent by the introduction portion 32C of the folding guide 32. Thereafter, the shaft member 12 is fitted and fixed to the groove portion of the adhesive tape dispenser in order to attach the folded portion forming device to which the adhesive tape 18 is attached to the adhesive tape dispenser.

  In order to form the folded portion of the adhesive tape 18, when the free end is drawn away from the folded portion forming device, the adhesive surface is moved in the direction of the folding roller 20 with a force according to the tensile force of the adhesive tape 18. The protruding portion of the pressure-sensitive adhesive tape 18 that is pressed and protrudes therefrom is bent in the direction of the adhesive surface. When the adhesive tape 18 is moved along with the free end, the folded portion is further folded in the direction of the adhesive surface by the folding guide 32, and a folded portion in which the adhesive surfaces are bonded together is continuously formed. The At this time, since the movement of the adhesive tape 18 in the axial direction is restricted by the first guide roller 14, the width of the folded portion can be made substantially constant.

  Accordingly, the folded portion of the adhesive tape 18 is mainly formed by the folding roller 20 and the folding guide 32 by using the force of feeding out the free end thereof, so that a robust and compact folded portion that does not require a power source is formed. It can be a device. Further, when the adhesive tape 18 is attached to the folded portion forming apparatus, the rotating member 24 to which the folding roller 20 is fixed is retracted, while the adhesive tape is utilized by using the force that rotates the rotating member 24 to the closed position. Since 18 is automatically guided to the folding guide 32, it can be easily mounted and replaced. Furthermore, since the folded portion forming device can be attached to the adhesive tape dispenser via the shaft member 12, the adhesive tape 18 can be easily fed and cut, and the labor required for the attaching operation can be reduced. In addition, since a holding mechanism for holding the adhesive tape 18 in a predetermined position is provided, the adhesive tape 18 may be detached from the folded portion forming device when the folded portion forming device is attached to or detached from the adhesive tape dispenser. Can be prevented.

  By the way, as shown in FIG. 9, when the folded portion forming device with the adhesive tape 18 attached is attached to the adhesive tape dispenser 38, if the adhesive tape 18 is detached from the cutting cutter for some reason, the folded portion forming device is tilted. End up. When the folded portion forming device is tilted, the free end of the adhesive tape 18 hangs down to the lower part of the adhesive tape dispenser 38, and it is difficult to pull it out. Further, since the width of the groove portion of the adhesive tape dispenser 38 is often different for each manufacturer, it is necessary to change the total length of the shaft member 12 according to the adhesive tape dispenser 38.

  Therefore, as shown in FIGS. 10 and 11, the shaft member 12 is divided into two divided members that can be relatively displaced in the axial direction thereof, and a disk having a substantially disk shape that is fixed to the tip of one of the divided members. It is desirable to include the member 40 and an elastic member 42 such as a spring that biases one of the divided members in a direction away from the other divided member. Here, at the center of the outer surface of the disc member 40, a protrusion 40A for fitting into the groove of the adhesive tape dispenser 38 is formed. In this way, even if the width of the groove portion of the adhesive tape dispenser 38 is different, it is possible to cope with it, and since the disk member 40 is pressed against the adhesive tape dispenser 38 by the elastic member 42, the adhesive tape 18 can be removed from the cutting cutter. Even if the free end is detached, the folded portion forming device can be prevented from tilting. In addition, when dealing with only the difference in the width of the groove portion of the adhesive tape dispenser 38, the disk member 40 may not be attached to the tip portion of one of the divided members.

  Further, when the folded portion is formed by attaching the adhesive tape 18 having a weak adhesive force to the folded portion forming apparatus, as shown in FIG. As shown to (B), there exists a possibility that it may peel off with progress of time and a return part may be lost. For this reason, when the adhesive strength of the adhesive tape 18 is weak, it is desirable to press the adhesive surfaces of the folded portion formed by the folding guide 32 more strongly to ensure the bonding.

  In view of this, a pressing mechanism that strongly presses the adhesive surfaces of the folded portions back together is incorporated into the second guide roller 16 as necessary. Specifically, as shown in FIG. 13, a stepped cylindrical pressing member 44 having a shorter overall length than the second guide roller 16 with respect to the second guide roller 16, while the cross section of the intermediate portion forms an arc shape. The second guide roller 16 projecting from the pressing member 44 is provided with an elastic member 46 such as a coil spring in order to slidably and slidably fit in the base member 10. Further, one end of the pressing member 44 located on the base member 10 side has a non-contact position shown in FIG. 14A (a position where the folded portion does not contact the arc shape) and a contact position shown in FIG. Part of the outer peripheral part is cut and two linear parts 44A and 44B are placed in contact with the guide part 32A of the folding guide 32 at two positions (position where the part comes into contact with the arcuate end). Is formed. Note that the radial dimension of one end of the pressing member 44 is larger than the distance between the axial center of the second guide roller 16 and the folding guide 32. Further, at the position where the pressing member 44 is slid to the maximum against the biasing force of the elastic member 46, the guide of the folding guide 32 is released so that the contact state between the pressing member 44 and the folding guide 32 can be released and turned. In the portion 32A, a rectangular relief hole 32D parallel to the transverse section of the second guide roller 16 is opened.

  In this way, when the adhesive tape 18 having a weak adhesive force is used, the pressing member 44 incorporated in the second guide roller 16 is rotated from the non-contact position to the contact position in the procedure as shown in FIG. Then, the arc-shaped end portion (corner portion) in the intermediate portion of the pressing member 44 comes into contact with the adhesive tape 18. For this reason, the contact area between the pressure-sensitive adhesive tape 18 and the pressing member 44 is reduced, the surface pressure is increased, and the pressure-sensitive adhesive surfaces of the folded portions are strongly pressed to each other, so that the bonding can be ensured. When the adhesive tape 18 having a strong adhesive force is used, the pressing member 44 is not moved from the contact position in order to increase the contact area between the adhesive tape 18 and the pressing member 44 and reduce the force required to pay out the free end. What is necessary is just to make it rotate to a contact position.

  Here, in order to intensively press the adhesive surfaces of the folded portion of the adhesive tape 18, the arc-shaped end portion of the pressing member 44 that contacts the adhesive tape 18 has an adhesive tape at the center as shown in FIG. 16. It is desirable to have various shapes away from 18. If it does in this way, the surface pressure which presses the adhesive surfaces of the folding | turning part of the adhesive tape 18 will rise further, and the bonding can be made still more reliable.

  In the folded part forming apparatus described above, the folded parts are formed at both ends in the width direction of the adhesive tape 18, but the folded parts may be formed only at one end.

The folding part formation method of an adhesive tape is shown, (A) is explanatory drawing of the effect | action of a bending roller, (B) is explanatory drawing of the effect | action of a folding guide. The perspective view which shows the basic composition of a folding | returning part formation apparatus The perspective view which shows the state which opened the rotation member of the folding | returning part formation apparatus. Explanatory drawing of the mechanism which holds a rotation member in a closed position The mechanism which hold | maintains a rotation member in an open position is shown, (A) is the explanatory drawing, (B) is explanatory drawing of the mechanism which prescribes | regulates an open position. Perspective view showing details of folding back guide Explanatory drawing of the holding mechanism that holds the adhesive tape in place The perspective view explaining the effect | action of the introducing | transducing part integrally formed in the folding | turning guide The trouble which occurs when the folding part forming device is attached to the adhesive tape dispenser is shown, (A) is a state diagram before the trouble occurs, (B) is a state diagram after the trouble occurs. The perspective view explaining the mechanism which prevents that the folding | returning part formation apparatus inclines The top view explaining the mechanism which prevents that the folding | returning part formation apparatus inclines The trouble that the turn-back part disappears is shown, (A) is a state diagram before the trouble occurs, and (B) is a state diagram after the trouble occurs. The perspective view explaining the mechanism which prevents that a folding | turning part disappears The action of the mechanism for preventing the folded portion from disappearing is shown, (A) is an explanatory diagram when the mechanism is unused, and (B) is an explanatory diagram when the mechanism is in use. The procedure which uses the mechanism which prevents that a return part is lost is shown, (A)-(D) is explanatory drawing of the 1st-4th procedure. The modification of the arc-shaped end part of a pressing member is shown, (A)-(C) is a perspective view explaining the 1st-the 3rd modification.

Explanation of symbols

A guide roller B guide roller C folding roller D adhesive tape E folding guide F folding section 12 shaft member 14 first guide roller 16 second guide roller 18 adhesive tape 20 folding roller 22 rotation center 24 rotation member 26 slide member DESCRIPTION OF SYMBOLS 28 Elastic member 30 Spring 32 Folding guide 32A Guide part 32C Introduction part 34 Holding roller 36 Spring 38 Adhesive tape dispenser 40 Disk member 42 Elastic member 44 Pushing member

Claims (9)

A first guide roller that sandwiches a part of both side surfaces of the adhesive tape wound around the winding core and regulates movement in the width direction, and the substrate surface of the adhesive tape is wound around and extends out its free end;
A second guide roller around which a base material surface of the adhesive tape fed out by the first guide roller is wound;
The adhesive surface of the adhesive tape is wound so that one end or both ends of the adhesive tape stretched between the first guide roller and the second guide roller are projected, and the protruding portion is directed to the adhesive surface direction. A folding roller that bends
A folding guide that is in contact with the protruding portion of the adhesive tape folded by the bending roller, further folding the protruding portion in the direction of the adhesive surface, and forming a folded portion in which the adhesive surfaces are bonded together;
Comprising
The folding roller includes a closed position where the protruding portion of the adhesive tape is bent in the direction of the adhesive surface, and an open position spaced from the adhesive surface of the adhesive tape stretched between the first guide roller and the second guide roller. And is displaceable,
The folding guide uses the force when the folding roller is displaced from the open position to the closed position to the folding guide while bending one or both ends of the adhesive tape wound around the folding roller. An apparatus for forming a folded portion of a pressure-sensitive adhesive tape, characterized in that an introduction portion for guiding is integrally formed.   2. The adhesive tape folding portion according to claim 1, further comprising a shaft member that can be fitted in a groove portion of the adhesive tape dispenser on a side opposite to the second guide roller across the first guide roller. Forming equipment.   The shaft member includes two split members that are relatively displaceable in the axial direction, and an elastic member that biases one split member in a direction away from the other split member. The apparatus for forming a folded portion of an adhesive tape according to claim 2.   4. The adhesive tape folded portion forming apparatus according to claim 3, wherein a disk member having a substantially disk shape is fixed to a tip portion of the one split member.   The folded part forming apparatus for an adhesive tape according to any one of claims 1 to 4, further comprising a holding mechanism for holding the adhesive tape in a predetermined position.   The adhesive tape folded part forming apparatus according to any one of claims 1 to 5, further comprising a pressing mechanism that presses the adhesive surfaces of the folded parts formed by the folded guide.   The pressing mechanism includes a pressing member that is rotatably fitted to the second guide roller while the cross section of the intermediate portion has an arc shape, and the folded portion of the adhesive tape contacts the arc-shaped end portion. 7. The adhesive tape folded portion forming apparatus according to claim 6, wherein the position can be switched between two positions: a position and a non-contact position where the folded portion does not contact the arc shape.   8. The adhesive tape folding portion according to claim 1, wherein each of the first guide roller, the second guide roller, and the folding roller is rotatably fixed. apparatus.   9. The fold roller according to claim 1, wherein a plurality of raised portions are formed in the circumferential direction to reduce a contact area with the adhesive surface of the adhesive tape. Adhesive tape folding part forming device.

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