JP2023045580A - web splicer - Google Patents

Abstract

An object of the present invention is to facilitate the operation of pulling out a web from a raw fabric roll in a web splicing device. A first bonding roll 1 and a second bonding roll 2 provided in the middle of a running path of an old web W1 unwound from one raw web roll T1 of an unwinding device T, and a first bonding roll It comprises a cutting blade 6 provided in the preceding stage of the traveling path of the roll 1, and operating devices 8 and 10 for moving the first bonding roll 1 and the second bonding roll 2 toward and away from each other. In the web splicing device for splicing the cut end of the old web W1 cut by the cutting blade 6 and the leading end of the new web W2 via the splicing tapes V1 and V2 by the rotation of the second sticking roll 2, the second sticking The bonding roll 2 was a web splicing device having the same diameter as the first bonding roll 1 or a smaller diameter than the first bonding roll 1 . [Selection drawing] Fig. 1

Description

The present invention relates to a web splicing device (splicing device) for various sheet-like materials such as plastic films, plastic sheets, paper, and metal strips.

2. Description of the Related Art Various web splicing devices are used to splice sheet-like materials (hereinafter referred to as webs) made of plastic films, plastic sheets, papers, metal foils, and various other flexible materials. This type of web splicing device is also called a splicing device. The tip of the web (hereinafter referred to as "new web") is connected (spliced) via a joining tape.

For example, in the web splicing device C of Patent Document 1, as shown in FIG. 11, an unwinding device T having two original fabric rolls T ₁ and T ₂ is provided. A first bonding roll (in Patent Document ₁ , _an upper bonding roll 1) and a second attaching roll (indicated as lower attaching roll 2 in Patent Document 1) are provided, and a cutting blade for the old web W1 is provided on the front stage side of the traveling path from the upper attaching roll ₁ . 6 is provided. The leading edge of the new web _W2 supplied from the other original roll _T2 is attracted to the lower bonding roll 2, and at least one of the upper bonding roll 1 and the lower bonding roll 2 has a splicing tape. be adsorbed. The old web _W1 is interposed between the upper bonding roll 1 and the lower bonding roll 2 and pressed against each other, and the cutting blade 6 cuts the old web _W1 before the contact point. After that, the upper bonding roll 1 and the lower bonding roll 2 are rotated in the running direction to bond the splicing tape to the cut end (rear end) of the old web _W1 and the leading end of the new web _W2 . The cut end of the web _W1 and the tip of the new web _W2 are spliced.

Japanese Patent No. 5865401

In the conventional web splicing device C shown in FIG. 11, when the old web _W1 fed out from one of the original fabric rolls _T1 approaches the end, the new web _W2 is pulled out from the other original fabric roll _T2 and The rear end of the old web _W1 and the front end of the new web _W2 cut at the point are spliced together. When switching the webs, it is necessary to pull the front end of the web material from the raw fabric roll _T2 of the new web _W2 to the web splicing device C side.

During this operation, an operator is positioned on the opposite side of the unwinding device T across the web splicing device C, that is, on the terminal end side of the web in the feeding direction (left side in FIG. 11), and the operator It is necessary to insert a hand between the roll ₁ and the lower bonding roll 2 and pull out the new web _W2 from the original roll T2 on the starting end side in the web feeding direction (right side in FIG. 11). Since the space between the upper bonding roll 1 and the lower bonding roll 2 is narrow, it is troublesome work for the operator to reach the original fabric roll _T2 . In addition, since the distance from the opposed portion of the upper bonding roll 1 and the lower bonding roll ₂ to the original fabric roll T2 is long, the operator is forced to take an unreasonable posture, and in some cases, the upper bonding roll In some cases, it may be necessary to insert the shoulders or upper body between 1 and the lower applicator roll 2 . Therefore, the operation of pulling out the new web _W2 is complicated.

In the conventional web splicing device C, when splicing the webs, the old web _W1 must be positioned above and the new web _W2 must be positioned below. Therefore, the unwinding device T splices the leading edge of the new web _W2 to the trailing edge of the old web _W1 , and then moves upward the other material roll _T2 supplying the new web _W2 . At the same time, it is necessary to install a new raw roll below in preparation for the next new web. As an unwinding device T capable of moving the original roll in the vertical direction, a biaxial turret winding provided with two shafts supporting the original roll along the circumferential direction of a turret (circular member) rotatably supported around the axis. An unwinding device (two-screw turret automatic unwinding device) is common. Since such an unwinding device T is large-scaled, it currently requires a large space to install the device.

Accordingly, the first object of the present invention is to facilitate the work of pulling out the web from the original roll in the web splicing device, and the second object is to make the web splicing device compact and reduce the installation space. do.

In order to solve the above-described first problem, the present invention provides an unwinding device having a plurality of original web rolls, and an old web unwound from one of the original web rolls. A first pasting roll and a second pasting roll facing each other with the old web therebetween, a cutting blade provided in front of the running path of the first pasting roll and cutting the old web, and the first pasting roll and an operating device for moving the roll and the second bonding roll toward and away from each other, wherein the leading edge of the new web pulled out from the other original roll is attracted to the second bonding roll, and the A web splicing device that splices the cut end of the old web cut by the cutting blade and the leading end of the new web via a splicing tape by rotation of the first pasting roll and the second pasting roll, A web splicing device having the same diameter as the first bonding roll or a smaller diameter than the first bonding roll was adopted as the second bonding roll.

Here, it is possible to employ a configuration in which the axis of the second bonding roll is eccentric toward the unwinding device with respect to the axis of the first bonding roll.

Further, the running path of the old web is inclined away from the second bonding roll as it goes from the facing portion of the first bonding roll and the second bonding roll toward the unwinding device. configuration can be adopted.

Further, in each of these modes, the cutting blade is a plate blade having a blade portion on the edge of a plate-shaped member, and the direction of the plate surface of the plate blade is oriented toward the latter side of the running path as it approaches the old web. It is possible to adopt a configuration suitable for

Further, in order to solve the above-mentioned second problem, the present invention provides an unwinding device having a plurality of raw web rolls, and an old web unwound from one of the raw web rolls. a first bonding roll and a second bonding roll facing each other across the old web; a cutting blade provided in front of the running path of the first bonding roll for cutting the old web; and an operating device for moving the bonding roll and the second bonding roll toward and away from each other, and the leading edge of the new web pulled out from the other original roll is attracted to the second bonding roll. and a web splicing device for splicing the cut end of the old web cut by the cutting blade and the leading end of the new web via a splicing tape by rotation of the first pasting roll and the second pasting roll. , the first pasting roll, the second pasting roll, the cutting blade, and the operating device constitute a web splicing unit, and the web splicing unit is positioned on the front stage side along the traveling path. a splicing unit and a second web splicing unit located on the downstream side, wherein the positions of the first bonding roll and the second bonding roll in the first web splicing unit in the vertical direction; A web splicing device is employed in which the positions of the first bonding roll and the second bonding roll in the splicing unit are reversed to each other in the vertical direction.

The configuration in which a plurality of the web splicing units are arranged in parallel and arranged upside down can also be applied to each of the above-described modes. That is, the first pasting roll, the second pasting roll, the cutting blade, and the operating device are provided in a web splicing unit, and the web splicing unit is located on the front stage side along the traveling route. 1 web splicing unit and the second web splicing unit located on the rear stage side, the position of the first bonding roll and the second bonding roll in the first web splicing unit in the vertical direction; A configuration in which the positions of the first bonding roll and the second bonding roll in the second web splicing unit in the vertical direction are opposite to each other can be adopted in each of the above-described modes.

Advantageous Effects of Invention The present invention facilitates the operation of pulling out a web from a raw fabric roll in a web splicing device, and can make the web splicing device compact to reduce its installation space.

1 is a side view showing a first embodiment of the invention; FIG. Enlarged view of main part of Fig. 1 Schematic diagram showing the process of web splicing in the first embodiment Schematic diagram showing the process of web splicing in the first embodiment Schematic diagram showing the process of web splicing in the first embodiment Schematic diagram showing the process of web splicing in the first embodiment Detail view of bend roll The side view which shows the 2nd Embodiment of this invention. The side view which shows the 2nd Embodiment of this invention. The side view which shows the 2nd Embodiment of this invention. Side view of conventional example

A first embodiment of the invention will be described with reference to FIGS. 1 to 7. FIG. The web splicing device C, as shown in FIG. 1, includes an unwinding device T (in the embodiment, a biaxial turret automatic unwinding device) provided with two material rolls _T1 and _T2 . Further, in the subsequent stage of the web splicing device C, another device such as a film cleaning device is installed via an accumulator device, a dancer roller device and the like (not shown). The films handled here are collectively referred to as "web W" hereinafter.

When the longitudinal web W is sent out from the raw fabric roll _T1 of the unwinding device T, the end portion of the web W is eventually reached. At this time, a new web W is fed out from another original roll _T2 , and the back end of the old web W and the front end of the new web are spliced with the splicing tape V. As shown in FIG. The new and old webs W are spliced by the web splicing device C. As shown in FIG. Hereinafter, the web W being fed into the web splicer C will be referred to as the old web _W1 , and the new web W will be referred to as the new web _W2 . Also, the traveling route of the old web _W1 is simply referred to as the web traveling route. Furthermore, in the embodiment, since two splicing tapes V are used on the front and back sides, they are referred to as splicing tapes V ₁ and V ₂ . The splicing tapes V ₁ and V ₂ are adhered to predetermined positions on the outer peripheral surface of the cylindrical roll that is in contact with the old web W ₁ or _{the new web W 2 .} It is attached to the tip of the web _W2 . In the drawing, the old web _W1 or the new web _W2 after passing through the web splicing device C is denoted by W. As shown in FIG.

First, the basic configuration of the web splicing device C will be described.

The web splicing device C is supported by a rectangular frame F, as shown in FIGS. In the middle of the traveling path of the old web _W1 pulled out from the original web roll _T1 , the first bonding roll ₁ is placed above and the second bonding roll 2 is placed below with the old web W1 interposed therebetween. They are provided facing each other. Each of the first bonding roll 1 and the second bonding roll 2 is composed of a cylindrical member (the cylindrical roll described above) having a circular cross section, and a part of the peripheral surface thereof is formed of a punching metal having a large number of through holes. , that portion serves as a suction portion for the joining tapes V ₁ and V ₂ . When the bonding tapes V ₁ and V ₂ are placed on the suction portion, the bonding tapes V ₁ and V ₂ are moved to the corresponding first bonding roll 1 and second bonding roll 2 by the negative pressure in the inner space of the cylindrical member. is adsorbed to The internal spaces of the first bonding roll 1 and the second bonding roll 2 are connected to suction means (negative pressure generating means) (not shown), respectively, and the inside of the cylindrical member becomes negative pressure due to the suction of the suction means. , to generate a suction force at the suction portion.

The peripheral surface of the first bonding roll 1 is an elastic surface made of metal (for example, iron, stainless steel, etc.), soft resin, rubber, or the like. A weight or magnet for adjusting the rotation stop position is attached to the shaft of the upper pasting roll 1, and the first pasting roll 1 always stops at a predetermined rotational position around the shaft. . The stop position is a position retreated from the contact pressure point of the first bonding roll 1 and the second bonding roll 2 by a required angle θ1 (see FIG. 2), the centers of the bonding tapes V ₁ and V ₂ , i.e., the rolls The centers of the splicing tapes V ₁ and V ₂ with respect to the circumferential direction of are positioned. The bonding tapes V 1 and V ₂ may be supplied to the first bonding roll ₁ and the second bonding roll 2 manually, or automatically using a separately provided bonding tape supply device. You may make it go to

A vacuum box 5 is provided on the upstream side of the web running path with respect to the first bonding roll 1 . A cutting blade 6 is provided adjacent to the vacuum box 5 . The cutting blade 6 is preferably between the first application roll 1 and the vacuum box 5 . The upper bonding roll 1 can be moved up and down together with the support block 7 by an air cylinder 8 . A rotary actuator for rotating and stopping the first bonding roll 1 around its axis is attached to the support block 7 . The first bonding roll 1 may be a free roll that rotates freely. Furthermore, the vacuum box 5 and the cutting blade 6 can move up and down together with the support block 7 . When the support block 7 descends, the first bonding roll 1, the vacuum box 5 and the cutting blade 6 come into contact with the web running path, and the old web _W1 is sucked by the vacuum box 5 and fixedly supported so as not to move. In this fixed state, the cutting blade 6 traverses (traverses) from the operating side to the driving side, thereby cutting the old web _W1 .

As with the first bonding roll 1, the second bonding roll 2 has a peripheral surface made of metal (for example, iron or stainless steel), or an elastic surface made of soft resin, rubber, or the like. However, it is preferable that one of the peripheral surfaces of the first bonding roll 1 and the second bonding roll 2 is made of an elastic material such as soft resin or rubber, and the other is made of metal. The second bonding roll 2 is at the front standby position where the old web _W1 and the new web _W2 are spliced, and the leading end of the splicing tape _V2 sucked by the suction part moves from the contact pressure point to the front side (in the figure clockwise) at the required angle .theta.2 (see FIG. 2). The rotation angle θ1 of the first bonding roll 1 and the rotation angle θ2 of the second bonding roll 2 (see FIG. 2) are such that when the first bonding roll 1 and the second bonding roll 2 rotate, the splicing tape _{The outer} peripheral _surface arc _lengths (roll circumference) are set to be the same. In this embodiment, the outer diameter of the first bonding roll 1 is 125 mm, and the outer diameter of the second bonding roll 2 is 125 mm. θ1 and θ2 can be appropriately set according to the outer diameters of the first bonding roll 1 and the second bonding roll 2 .

The second pasting roll 2 is attached to a base 9 that can be raised and lowered by an air cylinder 10 . The second bonding roll 2 moves up and down together with the base 9 within a range corresponding to the height x shown in FIG. A rotary actuator or a servo motor is attached to the base 9 to rotate and stop the second bonding roll 2 around its axis. In some cases, a standby position vacuum box that can be raised and lowered by an air cylinder or the like is provided on the upstream side of the web travel path with respect to the second bonding roll 2 . Here, the air cylinder 8 for raising and lowering the first bonding roll 1 and the air cylinder 10 for raising and lowering the second bonding roll 2 are the operating devices 8 and 10 defined in the claims, that is, the first bonding roll. Actuating devices 8 and 10 are configured to move the first and second bonding rolls 2 toward and away from each other. Only the air cylinder 10 on the side of the second bonding roll 2 may be used as the operating device 10 for moving the first bonding roll 1 and the second bonding roll 2 toward and away from each other. Further, the operating devices 8 and 10 are not limited to air cylinders for axially advancing and retracting rods using compressed air as in the embodiment, and may be other means such as a hydraulic operating mechanism, a motor operating mechanism, or the like. may be adopted.

A preparation roll 16 is provided on the front side (the left side in FIG. 1) of the frame F with respect to the second bonding roll 2 . The preparation roll 16 is connected to an actuator 17 via an arm, and the arm can be raised and lowered by the movement of the actuator 17 . This undulating motion enables the preparation roll 16 to contact and retract from the second bonding roll 2 . The preparation roll 16 is normally retracted from the second bonding roll 2 . When the arm is laid down by the actuator 17, the preparation roll 16 is brought into contact with the lower bonding roll 2 with the new web _W2 interposed therebetween. Further, the new web _W2 is pulled out further and wound around the preparation roll 16, and the inside of the preparation roll 16 is sucked to suck the new web _W2 . Grooves are formed in the preparation roll 16 along the roll width direction, and by cutting the tip of the new web _W2 along the grooves, the old web _W1 and the new web _W2 can be spliced together without gaps. can be prepared for

Next, the operation of the web splicing device C and features of the present invention will be described.

As shown in FIG. 3, the old web _W1 is sent out from the right side of the drawing to the web splicer C, and the old web _W1 is running in one direction (to the left side of the drawing). Reference numerals 11, 13, 14 and 15 in the drawing all indicate feed rolls. In this running state, the new web _W2 is pulled out from the original fabric roll _T2 when the end of the running old web _W1 approaches or at an appropriate time before the end approaches. At this time, the splicing tape V ₂ is placed on the second application roll 2 . Here, by sucking air into the inner space of the second sticking roll 2, the non-sticking surface of the splicing tape _V2 is attracted to the roll side, and the sticking surface having adhesive strength becomes the outer diameter side of the roll. ing.

The leading edge of the new web _W2 is manually cut across its entire width, and the leading edge of the new web _W2 is cut while manually centering the new web _W2 in the width direction (the depth direction in the drawing). The new web W2 is superimposed on the splicing tape _V2 on the second bonding roll 2, and in that state, the new web _W2 is sucked. Here, the leading edge of the new web W ₂ is pressed against the second bonding roll 2 by the preparation roll 16 . After that, the second bonding roll 2 is pushed back, and the position of the leading end of the new web _W2 is set at a fixed position on the front side by θ2 from the contact pressure point.

In addition, by sucking air into the inner space of the first bonding roll 1, the non-sticking surface of the bonding tape _V1 is similarly attracted to the roll side, and the sticking surface having adhesive strength is on the outer diameter side of the roll. It's becoming After that, the first bonding roll 1 is pushed back, and the center of the splicing tape _V1 is set at a fixed position on the front side by θ1 from the contact pressure point. This setting to the fixed position can be automatically performed by rotating the first application roll 1 by the action of the weight.

By the above actions, the preparation for joining (splicing) the old web _W1 and the new web _W2 is completed (state shown in FIG. 3). Until this point, the running of the old web _W1 continues. When the splicing preparation completion switch is pressed (turned on) after the splicing preparation is completed, the second bonding roll 2 is raised by the height h as shown in FIG. After that, the preparation roll 16 is retracted. Further, the unwinding device T stops, and the running of the old web _W1 stops. Here, if a stopper is provided in the middle of the web running path to prevent the application of a pulling force to the old web _W1 from the accumulation device or the like in the latter stage, the tension to the old web _W1 in the web splicing device C can be reduced. can be released.

Subsequently, the first bonding roll 1 and the second bonding roll 2 are brought into contact pressure (nip) with the old web _W1 interposed therebetween. During this contact pressure, the second bonding roll 2 bites into the upper bonding roll 1 having an elastic surface and reliably nips the old web _W1 . In addition, only the surface of the second bonding roll 2 can be an elastic surface, and only the surface of the first bonding roll 1 can be an elastic surface.

Simultaneously with or after the first bonding roll 1 and the second bonding roll ₂ are pressed against each other, as shown in FIG. to cut the old web _W1 . At this time, since the old web _W1 is supported by the vacuum box 5, the cut end does not hang down, and the cutting can be performed smoothly. Here, as described above, the distance from the contact pressure points of the first bonding roll 1 and the second bonding roll 2 to the cutting line of the old web _W1 is The roll circumference to the center of the splicing tape _V1 (referred to as the first rotation circumference), and the roll circumference from the contact pressure point to the center of the splicing tape V2 of the second pasting roll ₂ (second rotation circumference length) is set to be approximately the same as

When the cutting of the old web _W1 is completed, the suction to the vacuum box 5 is stopped, the second bonding roll 2 is rotated counterclockwise in the drawing, and the first bonding roll 1 is rotated along with this rotation. rotates clockwise. When the second bonding roll 2 rotates, the suction force of the vacuum box 5 is such that the running of the old web _W1 is not hindered _. may stop sucking after leaves the vacuum box 5 . As the second bonding roll 2 rotates, the old web _W1 and the new web _W2 are sent out by the first bonding roll 1 and the second bonding roll 2 which are in contact with each other. Therefore, the cut end of the rear end of the old web _W1 and the leading end of the new web _W2 are brought into contact with each other and connected.

When the trailing edge of the old web _W1 and the leading edge of the new web _W2 collide, and the first bonding roll 1 and the second bonding roll 2 rotate, the splicing tape _V2 is bonded to the leading edge of the new web _W2 . is adhered to the lower surface of the rear end of the old web W _-1 , and the splicing tape V _-1 adsorbed to the first adhesion roll 1 is attached to the front end of the new web W- ₂ and the rear end of the old web W- ₁ . It is pasted on the surface across the front and back with the butt line as a boundary. Therefore, the old web _W1 and the new web _W2 are joined and spliced by the joining tapes _V1 and _V2 on both the front and back sides. At this time, the butted portions _{of the old} web _W1 and the new web _W2 do not have to _be perfect. There may be some gaps. The size of this gap can be corrected by shifting the preparation position of the second bonding roll 2 in advance. Also, the gap can be made as close to 0 mm as possible. Furthermore, by using a double-sided tape as the joining tape, not only butting but also overlapping is possible.

When the splicing of the old web _W1 and the new web _W2 is completed, the suction of the first bonding roll 1 and the second bonding roll 2 is stopped, and as shown in FIG. lower the The web W after the splicing of the old web _W1 and the new web _W2 travels, and the slack of the new web _W2 is removed. Also, the first bonding roll 1, the vacuum box 5 and the cutting blade 6 are lifted and returned to the initial position where they are separated from the web running path. The old web _W1 remaining on the unwinding device T side of the cutting line is wound up by the unwinding device T at an appropriate time. After that, in the unwinding device T, the new unwinding shaft and the old unwinding shaft are reversed up and down, the former shifts to the old unwinding shaft, and the latter shifts to the new unwinding shaft. Thereafter, the old web _W1 is unwound from the original web roll _T1 that has shifted to the old unwinding shaft side. Also, a new material roll _T2 is prepared for the next new web _W2 on the new unwinding shaft.

By the way, in the conventional web splicing device C, as shown in FIG. 11, the diameter S of the second bonding roll 2 was larger than the diameter R of the first bonding roll ₁ . The positions of the withdrawal point Z of _W2 and the axial center _U2 of the original fabric roll _T2 were far away from the axial center of the second bonding roll 2 toward the unwinding device T (distance d in FIG. 11). ', distance e'). In addition, since the diameter S of the second bonding roll 2 is large, the distance between the first bonding roll 1 and the second bonding roll 2 when the second bonding roll 2 is lowered (the distance in FIG. 11 x' reference) could not be secured widely. For this reason, it was difficult for the worker on the front side of the frame F shown in FIG. 11 to reach the original fabric roll _T2 , which is the new base material for replacement, and the work was complicated.

On the other hand, in this embodiment, as shown in FIG. 2, the diameter S of the second bonding roll 2 is the same as the diameter R of the first bonding roll ₁ . The positions of the withdrawal point Z of the new web _W2 and the axial center _U2 of the original fabric roll _T2 can be brought closer to the axial center side of the second bonding roll 2 than conventionally (distance d and distance e in FIG. 4). reference). If the distance between the new web _W2 and the second bonding roll 2 is shortened, the worker on the front side of the frame F can easily reach the original roll _T2 , which is the new base material for replacement. In addition, by setting the diameter S of the second bonding roll 2 to be the same as the diameter R of the first bonding roll 1, when the second bonding roll 2 is lowered, the first bonding roll 1 and the second bonding roll 2 It is possible to secure a wider gap (see distance x in FIG. 3) from the pasting roll 2 than in the past. Therefore, the working space between the first bonding roll 1 and the second bonding roll 2 is widened, and the operator on the front side of the frame F can easily pull out the leading edge of the new web _W2 . Even if the diameter S of the second bonding roll 2 is smaller than the diameter R of the first bonding roll 1, the same effect can be expected.

By the way, in the conventional web splicing device C, the second bonding roll 2 having a relatively large diameter is used because the sheet-like material forming the splicing tape _V2 bends (bends) along the roll. It is intended that the material is familiar with the peripheral surface of the second bonding roll 2 and is easily adsorbed. In this embodiment, when the diameter S of the second bonding roll 2 is the same as the diameter R of the first bonding roll 1 or smaller than the diameter R of the first bonding roll 1, as shown in FIG. By separately attaching the bend roll 22 , the material of the joining tape V ₂ can easily conform to the peripheral surface of the second bonding roll 2 . That is, when the bend roll 22 is in contact with the second bonding roll 2 and the second bonding roll 2 rotates, the bend roll 22 spreads the sheet-like material forming the splicing tape V ₂ to the second bonding roll 2 . It exerts a function of pressing along the peripheral surface of the pasting roll 2. - 特許庁The peripheral surface of the bend roll 22 is desirably made of an elastic material such as resin or rubber. The bend roll 22 may be in a state of constantly contacting the peripheral surface of the second bonding roll 2, or may move up and down in the direction indicated by the arrow in FIG. You may make it separate.

Further, in this embodiment, as shown in FIG. 2, the axis Q of the second bonding roll 2 is arranged eccentrically toward the unwinding device T with respect to the axis P of the first bonding roll 1. there is That is, in the contact pressure state shown in FIG. It forms an angle α (90>α>0) to the output device T side. Therefore, the distance between the new web _W2 and the second bonding roll 2 can be made even closer. In addition, since the axis Q of the second application roll 2 approaches the unwinding device T side, the worker can work by stepping into a position closer to the unwinding device T.

Furthermore, in accordance with the eccentricity between the axis P and the axis Q, the web running path extends from the facing portion (contact point) of the first bonding roll 1 and the second bonding roll 2 to the unwinding device T side. It slopes upwards towards. That is, the web running path is inclined away from the second bonding roll 2 as it goes from the contact pressure point toward the unwinding device T side. Therefore, the old web _W1 is less likely to be an obstacle when the new web _W2 is pulled out, and the original fabric roll _T2 of the new web _W2 , which is the new base material for replacement, can be arranged higher. Positioning the original web roll _T2 higher makes it easier for the operator's hand on the front side of the frame F to reach the leading edge of the new web _W2 .

Also, as shown in FIG. 2, the cutting blade 6 is a plate blade provided with a blade portion on the edge of a plate-like member, and the direction of the plate surface of the plate blade increases as it approaches the old web _W1 . Facing the rear stage of the route. Therefore, the cut portion of the old web _W1 can be brought closer to the contact pressure point. As a result, the above-mentioned first rotation circumference and second rotation circumference can be reduced, so that the web splicing device C can be operated at high speed compared to the conventional web splicing device. The reason why the cut portion of the old web _W1 can be brought closer to the contact point is that the diameter S of the second bonding roll 2 is made smaller than before. That is, since the second bonding roll 2 having a large diameter as in the conventional art has a long second rotation circumference, the cutting blade 6 has to be positioned far away from the contact pressure point toward the front stage. It is due to

In this first embodiment, a biaxial turret automatic unwinding device equipped with two original fabric rolls T ₁ and T ₂ is adopted as the unwinding device T, but the configuration of the unwinding device T is similar to that of this embodiment. is not limited, and various types of unwinding devices T capable of vertically exchanging the plurality of original fabric rolls T ₁ and T ₂ can be employed.

A second embodiment of the invention will be described with reference to FIGS. 8 to 10. FIG.

This embodiment comprises two web splicing units arranged side by side each having the first bonding roll 1, the second bonding roll 2, the cutting blade 6, and the operating devices 8, 10 in the first embodiment described above. By arranging the two web splicing units upside down, it is unnecessary to change the top and bottom of the original fabric rolls T ₁ and T ₂ in the unwinding device T. That is, of the two original web rolls T ₁ and T ₂ , the upper part can be set to the old web W ₁ and the lower part to the new web W 2 , or the lower part can be set to the old web W ₁ and the upper part to the new web W _{2 .} can.

A web splicing unit positioned on the front side along the web running path is called a first web splicing unit A, and a web splicing unit positioned on the rear side is called a second web splicing unit B. The configurations of the first web splicing unit A and the second web splicing unit B are basically the same as those of the web splicing device C in the first embodiment. The members and devices provided in the first web splicing unit A and the second web splicing unit B, respectively, are added to the reference numerals attached to the members and devices provided in the web splicing device C in the first embodiment, and a lower case letter a or b. is attached.

That is, the first web splicing unit A includes a first bonding roll 1a, a second bonding roll 2a, a vacuum box 5a, a cutting blade 6a, a support block 7a, an air cylinder (operating device) 8a, a base 9a, an air cylinder ( operating device) 10a, a preparation roll 16a, and an actuator 17a. The second web splicing unit B includes a first bonding roll 1b, a second bonding roll 2b, a vacuum box 5b, a cutting blade 6b, a support block 7b, an air cylinder (operating device) 8b, a base 9b, an air cylinder ( operating device) 10b, a preparation roll 16b, and an actuator 17b. As shown in FIG. 8, the vertical positions of the first bonding roll 1a, the second bonding roll 2a, the vacuum box 5a, the cutting blade 6a, and other members in the first web splicing unit A, and the second The positions of the first bonding roll 1b, the second bonding roll 2b, the vacuum box 5b, the cutting blade 6b, and other members in the web splicing unit B are reversed from each other. Reference numerals 12u, 12d, 13u, 13d, 14u, 14d, 18, and 20 in the drawing denote feeding rolls, and reference numeral 19 denotes an elevating device for elevating the feeding roll 20. FIG. The first web splicing unit A and the second web splicing unit B may be provided with the bend rolls shown in FIG. 7 of the above embodiment.

However, the second web splicing unit B is provided with an elevating vacuum box 4b in front of the second bonding roll 2b. When the second bonding roll 2b descends toward the first bonding roll 1b, the lifting vacuum box 4b sucks and holds the new web _W2 . It should be noted that such a lifting vacuum box may be installed in front of the second bonding roll 2a of the first web splicing unit A, or in front of the second bonding roll 2 in the first embodiment. may be provided.

The actions of the first web splicing unit A and the second web splicing unit B are also basically the same as those of the web splicing device C in the first embodiment. FIG. 8 shows the old web W1 pulled out from the upper material roll T1 provided in the unwinding device T using the first web splicing unit _A , and the old web _W1 pulled out from the lower material roll _T2 . The process of splicing a new web _W2 is shown. In FIG. 8, the leading edge of the new web _W2 is attracted to the second bonding roll 2a via a bonding tape (not shown in FIG. 8).

FIG. 9 shows the old web W1 pulled out from the lower material roll _T1 provided in the unwinding device T using the second web splicing unit B, and the old web _W1 pulled out from the upper material roll _T2 . The process of splicing a new web _W2 is shown. In FIG. 9, the leading edge of the new web _W2 is attracted to the second bonding roll 2b via a bonding tape (not shown in FIG. 9).

10 is a detailed view of FIG. 9. FIG. As shown in FIG. 10, in the first web splicing unit A, the diameter Sa of the second bonding roll 2a is the same as the diameter Ra of the first bonding roll 1a. As a result, the point at which the new web _W2 is pulled out from the original fabric roll _T2 and the position of the axis of the original fabric roll _T2 can be brought closer to the axis of the second bonding roll 2 than conventionally. , are the same as in the first embodiment. Further, by setting the diameter Sa of the second bonding roll 2a to be the same as the diameter Ra of the first bonding roll 1a, when the second bonding roll 2a is lowered, the first bonding roll 1a and the second bonding roll 1a It is the same as in the first embodiment that the space between the bonding roll 2a and the bonding roll 2a can be secured wider than in the conventional art. The diameter Sa of the second bonding roll 2a may be smaller than the diameter Ra of the first bonding roll 1a. Further, in this embodiment, when the diameter Sa of the second bonding roll 2a is made the same as the diameter Ra of the first bonding roll 1 or smaller than the diameter Ra of the first bonding roll 1a, the bend It is also the same that if a roll is attached separately, the material of the joining tape _V2 can easily fit along the peripheral surface of the second bonding roll 2a.

Further, in the first web splicing unit A, the axis Qa of the second bonding roll 2a is arranged eccentrically toward the unwinding device T with respect to the axis Pa of the first bonding roll 1a. That is, in the contact pressure state, the contact pressure direction line Da connecting the axis Pa of the first bonding roll 1a and the axis Qa of the second bonding roll 2a is on the unwinding device T side with respect to the vertical direction line Ea. It forms an angle α (90>α>0). Therefore, the distance between the new web _W2 and the second bonding roll 2 can be made even closer.

Further, in the first web splicing unit A, the web running path is aligned with the eccentricity between the axis Pa and the axis Qa at the facing portions (contact pressure points) of the first bonding roll 1 and the second bonding roll 2. , the slope rises toward the unwinding device T side. That is, the web running path is inclined away from the second bonding roll 2 as it goes from the contact pressure point toward the unwinding device T side. Therefore, the old web _W1 is less likely to be an obstacle when the new web _W2 is pulled out, and the original fabric roll _T2 of the new web _W2 , which is the new base material for replacement, can be arranged higher. Furthermore, in the first web splicing unit A, the cutting blade 6 is a plate blade having a blade portion on the edge of a plate-like member, and the direction of the plate surface of the plate blade changes toward the old web _W1 . It is the same in that it is directed to the rear stage side of the traveling route.

Further, in the second web splicing unit B, similarly to the first web splicing unit A, the diameter Sb of the second bonding roll 2b is the same as the diameter Rb of the first bonding roll 1b or The diameter is smaller than the diameter Rb. In addition, the point that the axis Qb of the second bonding roll 2b is arranged eccentrically toward the unwinding device T side with respect to the axis Pb of the first bonding roll 1b is also the same. In the contact pressure state shown in FIG. 9, the contact pressure direction line Db that connects the axis Pb of the first bonding roll 1 and the axis Qb of the second bonding roll 2 is aligned with the vertical direction line Eb. It forms an angle β (90>β>0) to the T side. This angle β is set to the same angle as the angle α in the first web splicing unit A, but may be set to different angles.

Furthermore, in this embodiment, as shown in FIG. 10, the web running path is arranged in the facing portion ( contact pressure point) toward the unwinding device T side. The gradient direction of the old web _W1 in the second web splicing unit B is opposite to the gradient direction of the old web _W1 in the first web splicing unit A. They are common in that they are inclined away from the second bonding roll 2 toward the unwinding device T side. In other words, they are common in that the work space sandwiched between the first bonding roll 1 and the second bonding roll 2 gradually widens from the front side of the frame F toward the unwinding device T side. . Therefore, the setting of the gradient of the web running path of the second web splicing unit B also contributes to the improvement of the workability during the web W splicing work.

In the above-described embodiments, the configuration of the invention has been described on the assumption that the web W (sheet material) is a plastic film, a plastic sheet, or the like. The present invention can be applied to any thin material that can be wound into a roll, such as a sheet or film made of a certain material.

1, 1a, 1b 1st sticking roll 2, 2a, 2b 2nd sticking roll 6, 6a, 6b Cutting blade
8, 10 Air cylinder (operating device)
C web splicing device (splice device)
T unwinding device (biaxial turret automatic unwinding device)
T ₁ , T ₂ Raw fabric rolls V, V ₁ , V ₂ Splicing tape W Web W ₁ Old web W ₂ New web

Claims (6)

An unwinding device (T) equipped with a plurality of raw fabric rolls (T ₁ , T ₂ );
A first bonding roll ( ₁ ) and a first bonding roll (1) provided in the middle of the running path of the old web (W ₁ ) pulled out from one of the original rolls (T ₁ ) and facing each other across the old web (W 1 ) 2 application rolls (2);
a cutting blade (6) provided in front of the running path of the first bonding roll (1) for cutting the old web (W ₁ );
an operating device (8, 10) for moving the first bonding roll (1) and the second bonding roll (2) toward and away from each other;
The leading end of the new web (W ₂ ) pulled out from the other original roll (T ₂ ) is attracted to the second bonding roll (2), and the first bonding roll (1) and the first bonding roll (1) The joining tapes (V ₁ , V ₂ ) are adsorbed to at least one of the two sticking rolls (2),
The cut end of the old web (W 1 ) cut by the cutting blade ( ₆ ) and the new web (W ₂ ) via the splicing tapes (V ₁ , V ₂ ),
A web splicing device, wherein said second application roll (2) has the same diameter as said first application roll (1) or a smaller diameter than said first application roll (1). 2. The axis (Q) of the second bonding roll (2) is eccentric to the unwinding device (T) side with respect to the axis (P) of the first bonding roll (1). A web splicing device according to . The running path of the old web (W ₁ ) extends from the facing portion of the first bonding roll (1) and the second bonding roll (2) toward the unwinding device (T). Web splicing device according to claim 1 or 2, which is slanted away from the applicator roll (2). The cutting blade (6) is a plate blade having a blade portion on the edge of a plate-shaped member, and the direction of the plate surface of the plate blade is directed toward the latter side of the running path as it approaches the old web ( _W1 ). Web splicing device according to any one of claims 1 to 3. An unwinding device (T) equipped with a plurality of raw fabric rolls (T ₁ , T ₂ );
A first bonding roll ( ₁ ) and a first bonding roll (1) provided in the middle of the running path of the old web (W ₁ ) pulled out from one of the original rolls (T ₁ ) and facing each other across the old web (W 1 ) 2 application rolls (2);
a cutting blade (6) provided in front of the running path of the first bonding roll (1) for cutting the old web (W ₁ );
an operating device (8, 10) for moving the first bonding roll (1) and the second bonding roll (2) toward and away from each other;
The leading end of the new web (W ₂ ) pulled out from the other original roll (T ₂ ) is attracted to the second bonding roll (2), and the first bonding roll (1) and the first bonding roll (1) The joining tapes (V ₁ , V ₂ ) are adsorbed to at least one of the two sticking rolls (2),
The cut end of the old web (W 1 ) cut by the cutting blade ( ₆ ) and the new web (W ₂ ) via the splicing tapes (V ₁ , V ₂ ),
The first bonding roll (1), the second bonding roll (2), the cutting blade (6), and the operating devices (8, 10) constitute a web splicing unit, and the web splicing unit comprises the It has a first web splicing unit (A) positioned on the front stage side along the traveling route and a second web splicing unit (B) positioned on the rear stage side, and the first web splicing unit (A) in the first web splicing unit (A) Vertical positions of the bonding roll (1) and the second bonding roll (2), and the first bonding roll (1) and the second bonding roll in the second web splicing unit (B) (2) The web splicing device in which the positions in the vertical direction are opposite to each other. Said first application roll (1), said second application roll (2), said cutting blade (6) and said operating device (8, 10) are provided in a web splicing unit, said web splicing unit comprising said It has the first web splicing unit (A) positioned on the front stage side along the traveling route and the second web splicing unit (B) positioned on the rear stage side, and the first web splicing unit (A) has the Positions of the first bonding roll (1) and the second bonding roll (2) in the vertical direction, and the first bonding roll (1) and the second bonding roll (1) in the second web splicing unit (B) A web splicing device according to any one of claims 1 to 4, wherein the vertical positions of the applicator rolls (2) are arranged opposite to each other.

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