JPH022775B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is capable of cutting a web of paper, plastic film, etc. when it reaches full volume, cutting the web while continuously conveying the web without stopping. This invention relates to an automatic web winding device that automatically performs a core switching operation for winding a web.

Various devices have been proposed for this type of automatic web winding device. A typical example of this is to use a serrated cutter to cut the web, place an arcuate web guide along the surface of a new core so as to form a web path between it, and then cut the web. One example is a device in which the subsequent web is guided along the web path by a jet of air and wound around a new core.

However, in such devices, the tip of the web is not fixed, so it does not come into close contact with the surface of the new core, and the tip of the web is cut into a triangular wave shape, so when it is wrapped with the next web, the web is The leading edge of the web frequently breaks, and the presence of air jets in the web path makes the web conveying state unstable, resulting in wrinkles at the leading edge of the web during winding. .

For webs such as toilet paper, where the quality of the area near the core is not important, the above-mentioned apparatus may be sufficient, but if the web is coated with a light-sensitive emulsion layer on its surface, In the case of photographic film, etc., if you continue to wind the web with its leading edge broken, the shape of the broken part will be transferred to the web from the next round, impairing the flatness of the web, and also causing pressure fog. Become. Furthermore, if wrinkles occur in the initial stage of winding, they will also cause plastic deformation in subsequent parts of the web, causing a decline in the quality and yield of the entire web. Losses in the initial stage of winding eventually lead to large losses in terms of money.

Conventionally proposed devices are unsuitable for winding photographic film because they often cause scratches on the web or damage the film due to static electricity called static electricity, and lack reliability in switching operations. Therefore, in conventional photographic film winding, web conveyance is temporarily stopped when changing the winding core, and the switching operation is performed manually. Therefore, equipment called an accumulator is required to store the web while the winding device is stopped, and this also hinders labor saving. Furthermore, with conventional equipment, automation increases the equipment cost for the simple task of cutting the web and winding it around the core. When it comes to devices that enable so-called double-sided winding,
This has the disadvantage that the device becomes extremely complicated.

The present invention has been made based on these circumstances, and its purpose is to make it possible to unattend the web core switching operation, and to
The core switching operation can be performed with high reliability while the web is being conveyed without stopping the device. Moreover, there is no risk of the web tip being bent or wrinkled, and the winding material near the core can be changed with high reliability. The object of the present invention is to provide an automatic winder that can be suitably used for winding photographic film, etc., where quality is important, and furthermore, an automatic winder that has a simple structure, has low equipment costs, and is capable of winding both sides. The goal is to provide equipment.

A feature of the present invention is that a piece of double-sided adhesive tape is attached to the surface of the web by facing the web transportation path and being rotated so that the tape surface of the tape comes into contact with the surface of the web. a double-sided adhesive tape piece pasting mechanism that rotates at a circumferential speed equal to
A cutting mechanism includes a cutting blade that rotates at a circumferential speed equal to the web conveyance speed, and a holding member holds and guides the leading part of the subsequent web cut by this cutting mechanism, and double-sided adhesive bonding on the web is performed. The present invention includes a holding and guiding mechanism for adhering the tape piece to the surface of a new core.

Examples of the present invention will be described below.

FIG. 1 is a front view showing an outline of an automatic web winding device according to an embodiment, and W indicates a web such as photographic film. This web W is traveling along a web conveyance path P at a constant conveyance speed, and the web conveyance path P continues to a turret type winder 1. In this turret type winding machine 1, a winding core 12, 13 and two guide rollers 14, 15 are installed at both ends of a cross-shaped turret arm 11, which is attached to rotate around a rotation center axis 16.
is attached, and in this state, the web W is wound around one winding core 12.

The web conveyance path P includes a guiding and feeding mechanism 2 that performs a guiding operation and a feeding operation of the web W by switching from the upstream side to the downstream side, and a leading part of the web W when the winding core is changed. A pull-back mechanism 3 that pulls back the web W to adjust the position of the web W, and a double-sided adhesive tape sticking mechanism (hereinafter referred to as the ``applying mechanism'') that affixes a double-sided adhesive tape piece (hereinafter referred to as the ``tape piece'') to the traveling web W. )4, Web W
A cutting mechanism 5 for cutting the web W, and a holding and guiding mechanism 6 for guiding the cutting leading part of the subsequent web W to the surface of a new core 13 are provided.

The guide feeding mechanism 2 has an air cylinder 2 at its base end.
an arm 23 that is attached to the arm 2 and swings around the shaft 22; a guide roller 24 that is attached to the tip of the arm 23;
A lead-in roller 25 is provided opposite the guide roller 24 via the web conveyance path P so that when the roller 3 descends, it comes into contact with the guide roller 24 to form a nip roller section. is connected to an electric motor via an electromagnetic clutch (not shown).

The pull-back mechanism 3 has an air cylinder 31 at its base end.
The web W is always guided along the surface of the lead-in roller 25, and the web W is always guided along the surface of the lead-in roller 25. As shown in Fig. 1, the air cylinder 3
The guide roller 34 is arranged so as to remain below the lead-in roller 25 even when the first cylinder rod is moved back and the arm 33 is raised to the position shown by the two-dot chain line.

The pasting mechanism 4 includes a first rotating arm 7 and a second rotating arm 7, which are opposite to each other via the web conveyance path P and have tape piece holding parts 71 and 71' formed on their tops for holding tape pieces. It consists of arm 7'. These rotating arms 7, 7' move the tape pieces held by the tape piece holding parts 71, 71', respectively, on axes Y, Y' extending in the width direction of the web W, and tangentially on the surface of the web W. It is attached to the shaft parts 72, 72' so that it can be rotated at a speed corresponding to the transport speed of the web W at the contact point a with the web transport path P along circular loci l4, l4' extending along the circumference of a circle having When the web W is wound around a new winding core 13 in the counterclockwise direction in FIG. When the tape piece is positioned on the other side S' of the web W and the web W is wound clockwise in FIG. The tape piece is placed in the tape piece holding portion 71'. When attaching a tape piece to one side S of the web W, the tape piece holding portion 71' of the second rotating arm 7' serves as a receiving surface; When pasting a piece of tape on the other side S', the first rotating arm 7
The tape piece holding portion 71 serves as a receiving surface. Since the rotating arms 7 and 7' have the same mechanical configuration, the first rotating arm 7 will be explained with reference to FIG. 2. The shaft portion 7
2 has a hollow part 721 extending in the axial direction therein, and the shaft end is connected to a suction means (not shown) via a rotary joint (not shown). An air guide path 73 is formed from the hollow portion 721 toward the top of the rotating arm 7, and this air guide path 73 connects to a suction chamber 74 provided near the top.
connected to. The tape piece holding section 71 is
It consists of an arcuate surface portion 711 forming a top surface, and a side surface portion 712 that continues to both ends of the arcuate surface portion 711, and each of the arcuate surface portion 711 and the side surface portion 712 has a large number of suction holes 75 that communicate with the suction chamber 74. It is perforated. Here, since the tape piece is adhered to the web W by being nipped by the rotating arms 7, 7', the tape piece holding portion 7
It is preferable to form a coating layer made of a shock absorbing material such as neoprene rubber on the surface of the first circular arc surface portion 711. 43 in Figures 1 and 2 is a piece of tape;
45 indicates a slip sheet. The structure of the tape piece 43 and interleaving paper 45 used in this example will be explained with reference to FIG. 3A. The interleaving paper 45 has release layers 452 and 453 made of silicon or the like formed on both sides of a support 451.
In order to hold the tape piece 43 and the interleaving paper 45 in the tape piece holding part 71 of the rotating arm 7, both ends 454, 4 of the interleaving paper 45 are held as shown in FIG.
55 is held by the side surface 712 of the tape piece holder 71, and both ends 434, 4 of the tape piece 43 are
35 is preferably located at the same position as the positions corresponding to both ends 713, 714 of the circular arc surface portion 711, or inwardly from these positions.
Since no force is applied from the tape piece 43 to both bent ends 454 and 455 in 5,
This is preferable because only the tape piece 43 can be transferred to the web W by reliably suctioning and holding the interleaving paper 45 to the tape piece holding portion 71. Both ends 434 and 435 of the tape piece 43 are connected to both ends 713 and 435 of the arc surface portion 711, respectively.
If it is located outward from the position corresponding to 714, the interleaving paper 45 may peel off from the tape piece holding portion 71 when the tape piece 43 is attached to the web W, which is not preferable.

The cutting mechanism 5 includes a first cutter rotor 51 and a second cutter rotor 51', which are provided to face each other via the web conveyance path P, and each of these cutter rotors 51 and 51'. These cutter rotors 51, 51' are composed of cutting blades 52, 52' that extend over the entire width of the web W that protrudes upward from the upper back surface.
52' is rotated along a circular locus that is centered on the axes X, X' extending in the width direction of the web W and extends along the circumference of a circle having a tangent to the surface of the web W.
It is attached to a frame not shown in the figure. Here, the holding guide mechanism 6 is attached to the first cutter rotor 51 and the second cutter rotor 51', respectively.
1 and 51' and the holding and guiding mechanism 6 have the same structure for the web W, so the cutter rotor 51, which is provided on one side of the web conveyance path P,
51' and the holding guide mechanism 6 will be explained with reference to FIGS. 4 and 5. First cutter rotor 51
A tubular shaft body 5 whose central axis is axis X is provided at both ends of the
3A and 53B are provided, and this shaft body 53
A and 53B are bearing units 54A and 53B, respectively.
It is rotatably supported by frames FA and FB via 54B. Between this frame FA and FB,
The above-mentioned guide and feed mechanism 2, pullback mechanism 3, tape piece sticking mechanism 4, etc. are arranged, and the shafts of each mechanism are attached. The cutter rotor 51
A ventilation passage 532 communicating with the cavity 531 of one shaft body 53B is formed inside of the cutter rotor 51, and this ventilation passage 532 extends from the cavity 531 along the axis It is bent 90 degrees from the center and reaches the surface of the cutter rotor 51. The hollow portion 531 is connected to the shaft body 53B.
The shaft end of the rotary joint is connected to a compressed air source, also not shown, via a rotary joint, not shown. In FIG. 1, 55 and 55' are guide rollers.

As shown in FIG. 6, the cutter rotor 5
The shaft bodies 53A, 53A' of the rotating arms 7, 7' are fixed to the gears G5, G5' that mesh with each other, respectively, and the shaft parts 72, 72' of the rotating arms 7, 7' are fixed to the gears G5, G5' that mesh with each other, respectively. It is fixed at G7 and G7'.
These four gears G5, G5', G7, G7' are
They all have the same number of teeth and the same radius, and the gear G7 associated with the first rotating arm 7 and the gear G5' associated with the second cutter rotor 51' are electric motors that are controlled at a constant speed and mesh with them. It is interlocked by a drive gear GD connected to M.

Here, the first rotating arm 7 is connected to the web conveyance path P.
is driven symmetrically with the second pivot arm 7',
Also, the cutting blade 5 of the second cutter rotor 51'
2' is driven symmetrically with the cutting blade 52 of the first cutter rotor 51 with respect to the web transport path P, so that the first rotary arm 7 and the 2 cutter rotor 5
Only the relative positional relationship between the cutting blade 1' and the cutting blade 52' will be explained. The radius of the circular locus l5', which is the moving path of the tip of the cutting blade 52', and the circular locus l, which is the moving path of the area where the tape piece of the rotating arm 7 is held.
The radius of 4 is equal. The rotating arm 7 is at a position Q where the front end 713 of the arcuate surface portion 711 returns at an angle θ1 with respect to the contact point a on the web conveyance path P and the axis Y.
1, and from this position Q1, passes through a position Q2 that coincides with the contact point a, further passes through a position Q3, which is advanced by an angle θ2 with respect to the Y axis, and returns to the original position Q1. On the other hand, the cutting blade 52 has its tip at an angle θ1 with respect to the X' axis from the contact point b on the web conveyance path P.
+θ2 It is waited at the returned position Q1', and this position Q
1', returns to the original position Q1' via a position Q2' advanced by an angle θ1 with respect to the X' axis and a position Q3' corresponding to the contact point b. The drive gear GD starts cutting the web W before the cutting blade 52' passes the position Q2'.
is rotated at the same speed as the conveyance speed, and then driven to pass through the position Q3' at that speed. The position Q2' of the cutting blade 52 corresponds to the point in time when the rotary arm 7 starts attaching the tape piece to the web W, and from this position Q2' the cutting blade 52 is moved along the circular locus l5' to the contact point b. The arc length of is the web conveyance path P from the contact point a to the contact point b.
is equal to the length of

The holding and guiding mechanism 6 includes a first holding and guiding mechanism that adheres the tape piece on one side S of the web W to the surface of the winding core, and a first holding and guiding mechanism that adheres the tape piece on the other side S' side of the web W to the surface of the winding core. However, in this embodiment, as will be clear from the operation described below, the functions of the first holding and guiding machine and the second holding and guiding machine are interchanged. , have the same mechanical configuration, and the first holding guide device has brackets 56, 56' that protrude rearward from the back surfaces of the cutter rotors 51, 51'.
A support arm 62, 62' is attached to rotate around the shaft portion 61, 61' along a plane parallel to the plane in which the arm 1, 51' is rotated, and an upper end of the support arm 62, 62'. and hollow boxes (hereinafter referred to as "pressing drums") 63, 63' as holding members provided to extend over the entire width of the web W, and these pressing drums 63, 63' are formed on pressing surfaces 631, 631' along the circular locus of rotation of the cutting blades 52, 52'. The lower ends of the support arms 62, 62' are connected via tension springs 64, 64' to brackets 57, 57' extending from the lower ends of the cutter rotors 51, 51', and The support arm 62 attached to the cutter rotor 51 is constrained counterclockwise in the figure, and the support arm 62' attached to the second cutter rotor 51' is constrained clockwise in the figure. Protrusions 621, 621' are formed near the lower ends of the support arms 62, 62',
These protrusions 621, 621' are connected to the holding guide mechanism 6.
When the cutter rotor 5 is not operated, the cutter rotor 5
Stopper 65 provided on the back of 1,51',
65'. Here, on the tops of the stoppers 65, 65', as shown in FIG.
51 is preferably provided. Reference numeral 66 in FIG. 5 is a stopper for regulating the stop position of the rotated pressing drum 63, and it is preferable to similarly provide a shock absorbing material 661 at the top of this stopper 66. This stopper 66 is omitted in FIG. 2. The press drum 63 will be explained with reference to FIG.
is formed, and the hollow portion is connected to the ventilation passage 53 in the cutter rotor 51 with a hose 68.
As will be described later, the pressing drum 63, which is connected to the winding core 13, sandwiches the web W between it and the web W and fixes it to the winding core 13 through the tape piece using the contact pressure. The surface layer on surface 631 is preferably made of a cushioning material such as neoprene rubber. As shown in FIG. 4, a shaft member 69 is fixed to one end of the pressing drum 63, and a cam follower 691 is rotatably supported at the tip of the shaft member 69. These are omitted in FIG. 5. said frame
Inside the FA, there is a pressing drum 63 as described later.
A cam plate 692 is disposed in a section where oscillating motion is required, and as the cutter rotor 51 rotates, the cam follower 691 comes into contact with and separates from the cam plate 692, and as a result, the press drum 63 allows the press surface 631 to A protruding position (indicated by a solid line in FIG. 5) that protrudes outward from the circular locus l5 of the cutting blade 52, and a pressing surface 631.
The cutting blade 52 performs an oscillating movement between a storage position (indicated by a two-dot chain line in FIG. 5) that is stored inward from the circular locus l5 of the cutting blade 52. That is, this cam plate 692 is
When the cutter rotor 51 is rotated from the position shown in FIG. The press drum 63 is formed in such a shape that the spring 64 returns the press drum 63 to the protruding position after the back of the press drum 63 passes near the contact point b in the circular locus l5 of the cutting blade 52. There is.

In an embodiment with such a configuration, the core on which the web W is wound is switched in the following manner. While the web W is being wound around the winding core 12, the cylinder rod of the air cylinder 21 in the guide and feed mechanism 2 is retracted, the guide roller 24 is separated from the lead-in roller 25, and the lead-in roller 25 is not shown in the figure. The connection with an electric motor (not shown) is cut off by a clutch that does not work, and the roller functions as a free roller. At this time, the cylinder rod of the air cylinder 31 of the pull-back mechanism 3 is moving forward and the guide roller 34 is in the lowered position as shown by the solid line in FIG.
It is wound around the core 12 via guide rollers 34, 55, and 14. On the other hand, a tape piece 43 to be pasted next is set in the tape piece holding portion 71 of the first rotating arm 7 of the pasting mechanism 4. When it is detected by an appropriate means that winding of the web W by the winding core 12 is nearing completion, the electric motor for driving the lead-in roller 25 starts rotating at a rotation speed corresponding to the conveyance speed of the web W. When this point is reached, the clutch is activated and the driving force of the electric motor is transmitted to the lead-in roller 25. Next, the air cylinder 21 associated with the guide and feed mechanism 2 is operated to lower the arm 23, thereby moving the guide roller 24 towards the lead-in roller 25.
At the same time, insert the web W. At this time, since the circumferential speed of the lead-in roller 25 matches the conveyance speed of the web W as described above, the lead-in roller 25
By forming the nip roller part, the web W
No slipping occurs. On the other hand, in the turret type winder 1, the winding core 13, which will next wind up the web W, is accelerated by an electric motor (not shown) until its circumferential speed matches the transport speed of the web W. In the winding roll in which the web W is wound around the winding core 12, the tension is controlled by an electric motor (not shown) connected to the winding core 12 before the above-mentioned nip roller portion is formed. After the nip roller portion is formed, the winding is controlled to be constant tension. Subsequently, when the winding of the web W by the winding core 12 is completed, the end of winding is detected by appropriate means and the electric motor M is driven, and this driving force is transmitted to the gears G7, G7, and G7 related to the pasting mechanism 4 through the drive gear GD. G
7' and gears G5 and G5' related to the cutting mechanism 5. As a result, the first rotating arm 7 starts rotating from the position Q1, and the tape piece 43 held thereon is accelerated until it reaches a speed equal to the conveying speed of the web W, and continues at this speed until it moves to the positions Q2, Q3. It is then decelerated and returns to position Q1 again. Along with this, the second
The rotating arms 7' are also rotated in synchronization, and these rotating arms 7, 7' nip the web W through the tape piece 43 at the contact point a at a speed equal to the transport speed of the web W, and Therefore, the tape piece 43 held by the first rotating arm 7 is attached to one side S of the web W. Here, since a peeling layer 452 is formed on the interleaving paper 45, the adhesive force between the mounting layer 432 on one side of the tape piece 43 and the web W is stronger than the adhesive force between the adhesive layer 433 on the other side of the tape piece 43. paper 45
Therefore, the tape piece 43 is easily peeled off from the interleaving paper 45 and transferred to the web W. On the other hand, by rotating gear G5',
The cutting blade 52' of the second cutter rotor 51' starts rotating from position Q1', and its tip passes through positions Q2' and Q3' at a speed that matches the conveyance speed of the web W, and cuts the tape of the web W. is bonded to the winding core 13, and then decelerated and returns to position Q1' again. Accordingly, the cutting blade 52 of the first cutter rotor 51
However, when the tape piece 43 starts to be attached to the web W, the cutting blade 52' is at the position Q2', and the arc length from this position Q2' to the contact point b along the circular locus l5' is is equal to the length of the web conveyance path P between the contact points a and b, so when the cutting blades 52 and 52' pass through the contact point b, the web W is moved to the front edge of the tape piece 43 as shown in FIG. It is cut at the position. When the cutting of the web W is completed in this way, a limit switch (not shown) is activated to issue a signal indicating the completion of cutting, and upon receiving this signal, the pull-back mechanism 3
The cylinder rod of the air cylinder 31 moves back,
As a result, the arm 33 and the guide roller 34 rise to the position shown by the two-dot chain line. The amount of swing of the pull-back mechanism 3 up to the guide roller 34 is determined by the amount of swing of the lead-in roller 25 as shown in FIG. The path length from the intersection A of the web W to the intersection B of the web W at the guide roller 34 at the solid line position, and the path length from the intersection A to the intersection B via the intersection C of the web W at the guide roller 34 at the two-dot chain line position. The difference from the path length is approximately the same as the distance L described above. On the other hand, the pressing drums 63, 63' are placed in the retracted position and rotate between the contact points of the circular loci l6, l6' drawn in the protruding position, as shown in FIG. It is placed in the extended position as shown in Figure 9. The subsequent web W, which has been pulled back upward after cutting, is continuously fed out by the lead-in roller 25, so that the leading part of the web W advances downward in an unrestrained state, but before the cutting of the web W is completed. Compressed air from a compressed air source (not shown) is injected from the air outlet 67 of the pressing drum 63' related to the second cutter rotor 51', so that the leading portion of the web W is directed toward the first cutter rotor 51'. The rotor 51 is in a state as if it were stuck to the pressing surface 631 of the pressing drum 63, that is, it is held by the pressing drum 63. As the cutter rotor 51 rotates, the pressing drum 63 moves to the protruding position while holding the leading part of the web W from the other surface S', and then rotates along the circular locus l6. The winding core 13 on which the winding is to be carried out has its surface in contact with this circular locus l6 or is located slightly inside the circular locus l6 (however, in FIGS. 7 to 9, the winding core 13 is not shown for convenience). ), as shown in FIG. 9, the tape piece on one side S of the web W is guided to the surface of the winding core 13 and pressed, thereby adhering it. As a result, the web W The leading portion is fixed to the new winding core 13 via the tape piece 43. When the web W continues to advance after being cut and is guided to the surface of the winding core 13 by the press drum 63, the leading end of the web W moves from the press surface 631 of the press drum 63 to approximately above the surface as shown by the dotted line in FIG. However, since the web W is pulled back by a length corresponding to L by the pull-back mechanism 3, it is located at the front end of the pressing surface 631. cutter rotor 5
When the pressing drum 63 separates from the new winding core 13 due to further rotation of the winding core 13, a limit switch (not shown) operates to issue a fixing completion signal, and in response to this signal, the cylinder rod of the air cylinder 31 of the pull-back mechanism 3 moves forward. The guide roller 34 is then lowered to the position indicated by the solid line in FIG. The fixed completion signal is
The tip of the web W wraps with the next web W,
It suffices if it is issued before the so-called entrainment. When the winding is completed, the new core 13 is rotated at a circumferential speed slightly faster than the conveyance speed of the web W, and the gap between the new core 13 and the nip roller section formed by the guide roller 24 and the lead-in roller 25 is rotated. When the slack is absorbed and an appropriate tension is generated in the web W, the cylinder rod of the air cylinder 21 of the guide and feed mechanism 2 is moved back to raise the guide roller 24 and release the nip condition, and a clutch (not shown) is activated. As a result, the lead-in roller 25 is released from the driving force of the electric motor and becomes free. Further, the winding speed of the new winding core 13 is controlled to match the conveying speed of the web W at the time when the nip state is released. After cutting the web W, the electric motor for driving the winding core 12 decelerates and stops according to a predetermined deceleration curve. This completes one cycle of the winding core switching operation, and the turret arm 11 is rotated counterclockwise in FIG. The winding core is removed, a new winding core is installed, and the turret arm 11 is rotated counterclockwise again to the normal winding position.

When winding the web W around the winding core 13 clockwise in the figure, the second rotating arm 7' holds the tape piece, and from this, the tape piece is pasted on the other side S' of the web W. At the same time, compressed air is injected from the air outlet of the pressing drum 63 related to the first cutter rotor 51, and the leading part of the web W is pressed against the pressing surface 631' of the pressing drum 63' related to the second cutter rotor 51'. All you have to do is press it.

Accordingly, the present invention attaches a piece of tape to one side of the web to be conveyed, cuts the web at the leading edge position of the tape piece, and also cuts the leading edge of the cut web by the holding member of the holding guide mechanism. Since the tape section of the web is held and guided, and the tape piece of the web is adhered to the surface of a new core, the conventional manual core switching operation can be performed automatically and with high reliability. Moreover, since the tape pieces are applied and the web is cut instantly, the holding member of the holding and guiding mechanism is operated at a speed that matches the web conveyance speed, without the need to temporarily stop the device. It is possible to continuously change the winding core while the web is being conveyed, which eliminates the need for additional equipment such as an accumulator. Moreover, since the pasting mechanism is configured to rotate the tape piece at a speed equal to the conveyance speed of the web and stick it to the web, the tape piece is surely and effortlessly peeled off from the interleaving paper and pasted onto the web. Further, since the cutting blade cuts the web at a speed matched with the web conveyance speed, the web can be cut easily and with good sharpness. Further, the leading part of the subsequent cut web is guided to the winding core, so the leading part of the web is conveyed in close contact with the winding core through the tape piece, and therefore, when winding, it is not attached to the next round of the web. Since the web is wrapped securely and there is no risk of the leading end of the web being bent, and the leading part of the web is transported on the surface of the winding core in a stable manner, there is no risk of wrinkling of the leading part of the web. As a result, it can also be used for winding photographic film, etc., where the quality of the wound product near the core is important. As in the embodiment, the pasting mechanism is constituted by a pair of rotating arms facing each other via the web conveyance path P, and the holding and guiding mechanism is constituted by a first holding and guiding machine and a second holding and guiding machine. As a result, a so-called double-sided winding device can be obtained with a simple configuration.

Furthermore, in the above embodiment, the following effects are obtained in addition to the effects of the present invention.

Cutting blades 52, 5 at the start of pasting tape pieces
The arc length of the circular locus l5, l5' from the position 2' to the contact point b is the web conveyance path P from the contact point b to the contact point a.
is equal to the length of , and the cutting blades 52 and 52' are moved at a speed equal to the conveyance speed of the web W from the position at the start of pasting the tape piece to the contact point b, so that the web W is moved to the leading edge position of the tape piece. can always be cut reliably.

The cutting blades 52, 52' of the cutting mechanism 5 and the pressing drums 63, 63' of the holding and guiding mechanism 6 are rotated by a common rotary cutter 51, 51', and the pressing drums 63, 63' are rotated by the cutting blades 52, 5.
2', the cutting mechanism 5 and the holding guide mechanism 6 are The structure can be made simple, and the cutting blades 52, 52'
Since a pull-back mechanism 3 is provided that pulls back the web W in the opposite direction to the traveling direction by a path length corresponding to the distance between the press drums 63 and 63' in the protruding position, the leading part of the web W is It can be reliably positioned at the tips of the pressing drums 63, 63' of the holding and guiding mechanism 6, and can be brought into close contact with the winding core.

Pressing drum 63' facing one side S of web W
The compressed air is ejected from the web W to the pressing surface 631 of the pressing drum 63 facing the other surface S' of the web W.
Press the leading part of the tape to make it look like it's stuck,
Since the configuration is such that the pressing drum 63 is guided to the surface of the winding core 13 along the rotation locus and pressed, the unrestrained web W after cutting can be reliably conveyed to the winding core 13. The holding and guiding operation can be performed with higher reliability, and the leading portion of the web W can be brought into close contact with the surface of the winding core 13 with certainty.

Although the embodiment capable of double-sided winding has been described above, the automatic web winding device according to the present invention may be configured only for single-sided winding. In this case, the pasting mechanism 4 may be configured only by the first rotating arm 7, and the holding and guiding mechanism 6 may be configured only by the first holding and guiding machine. Specifically, for example, In FIG. 1, a receiving roller is used instead of the second rotating arm 7', the cutting blade 52' is fixed to the frames FA and FB instead of the second cutter 51', and a so-called fixed blade is used. Instead of using the air jet nozzle 63', the air jet nozzle may be fixed to the frames FA and FB.

Further, in the present invention, the pull-back mechanism is not necessarily required, and if it is not used, for example, a hollow member having a suction port on the surface, which is a component of the holding and guiding mechanism, is attached to the back of the cutting blade. It may be provided so as to be able to protrude freely along the web, and the leading part of the web may be guided to the surface of the winding core while being sucked by the hollow member.

In addition, in the present invention, the leading part of the web is attracted to the holding member using static electricity, or
It may be held by a holding member and guided to the surface of a new winding core.

As described above, according to the present invention, it is possible to make the web core switching operation unmanned, and it is also possible to perform the core switching operation with high reliability while the web is being transported without stopping the device. To provide an automatic winding device that can be suitably used for winding photographic film, etc., where the quality of the winding material near the core is important, and there is no risk of the web tip being bent or wrinkling. Further, it is possible to provide an automatic winding device with a simple structure, low equipment cost, and capable of winding on both sides.

[Brief explanation of drawings]

FIG. 1 is a front view showing an outline of an embodiment of the present invention, FIG. 2 is a front view showing the rotating arm shown in FIG. 1, and FIG. FIG. 3B is an explanatory diagram showing how the double-sided adhesive tape piece and interleaving paper are attached to the rotating arm shown in FIG. 1, and FIG. 4 is an explanatory diagram showing the cutting mechanism and holding guide shown in FIG. 1. FIG. 5 is a plan view showing part of the mechanism; FIG. 5 is a front view showing part of the cutting mechanism and holding guide mechanism shown in FIG. 1; FIG. 6 is a diagram showing the relative positional relationship between the rotating arm and the cutting blade. The explanatory drawings and FIGS. 7 to 9 are operation explanatory views showing the operations of the cutting mechanism and the holding and guiding mechanism, respectively. 1... Turret type winder, 12, 13... Winding core,
2... Guide feeding mechanism, 24... Guide roller, 25... Lead-in roller, 3... Pulling back mechanism, 4... Double-sided adhesive tape piece sticking mechanism, 43... Double-sided adhesive tape piece, 4
5, 45'... Insert paper, 5... Cutting mechanism, 51, 51'...
Cutter rotor, 52, 52'...cutting blade, 6...
Holding guide mechanism, 62, 62'... Support arm, 63,
63'...pressing drum, 631, 631'...pressing surface,
67... Air outlet, P... Web conveyance path, W... Web, 7, 7'... Rotating arm, 71, 71'... Double-sided adhesive tape piece holding section, 74... Suction chamber, 75... Suction hole, G5, G5 ', G7, G7'...Gear, GD...Drive gear.

Claims (1)

[Claims] 1 Facing the web conveyance path, a piece of double-sided adhesive tape is rotated so that the tape surface is in contact with the web surface and attached to the web surface, rotating at a circumferential speed substantially equal to the web conveyance speed. a cutting mechanism equipped with a cutting blade that cuts the web at the front edge position of the double-sided adhesive tape piece and is rotated at a circumferential speed equal to the conveying speed of the web; It is characterized by comprising a holding and guiding mechanism that holds and guides the leading part of the cut subsequent web by a holding member and adheres the double-sided adhesive tape piece on the web to the surface of a new core. Automatic web winding device.