JPS6397560A - Automatic connection of web and apparatus thereof - Google Patents

Abstract

PURPOSE:To permit the continuous use of a web by the heat-adhesion of the terminal edge part and the starting edge part of the webs to be used alternately by setting the adhesion surfaces so as to be opposed and permitting the alternate adhesion of the both webs. CONSTITUTION:A web f1 driven out from the first original cloth roller F1 is transported onto a packer side through a guide part D1. At this time, the web f2 on the second original cloth roller F2 is pulled out to a waiting set side through a guide part D2, and held by a nipping tool 9, keeping the adhesion surface upwardly, onto the sealing board 31 of the first heat adhesion mechanism H1. When the exhaustion of the first side web f1 if detected by a detecting lever 2, a sensor 18 detects a register mark at a prescribed position apart from the edge of the web, and a main motor is stopped. Then, an auxiliary feed mechanism L stops the edge of the web f1 by the first heat adhesion mechanism H1, and the starting edge of the second web f2 in waiting is allowed to adhere.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an automatic web connection method and apparatus, and more particularly, to a method and apparatus for automatically connecting webs, and more particularly, to a web connection method that requires at least two web rolls (web rolls) that are used alternately. A method for automatically connecting the terminal end of a web to be used first and the starting end of a web waiting to be used later when the web is set in a mechanism of The present invention relates to a connection device that can suitably implement the method.

Technical background The above-mentioned web generally has the form of a long thin sheet material or film material, and this web is suitably used as a packaging material supplied to, for example, a bag making, filling, and sealing packaging machine. There is. The material of this packaging material, especially its characteristics such as adhesiveness, can be broadly classified as follows.

■It is a single layer (single layer) of ultra-thin thermoplastic synthetic resin material,
Both sides can be heat-sealed.

■It is a composite (multi-layer) consisting of a cutting material laminated on one side of an ultra-thin thermoplastic synthetic resin material.

Only one side (resin material side) can be thermally bonded.

Webs with any of these forms have the required width depending on their use and the size of the packaged items, and generally have registration marks printed at equal intervals on the side edges for alignment. It is. The nib is traded as a roll of raw material in which a predetermined light weight is wound around the outer periphery of a hollow core tube.

A web feeding device incorporated into a packaging machine (a vertical type bag making and filling packaging machine) is provided with two set shafts on the top and bottom or on the left and right, and a roll of fabric is set on each set shaft. Then, when the web from one raw roll is provided to the preceding use side and used up in the packaging mechanism, the web from the other raw roll is switched to the next use side (following use side) and wrapped. It is fed towards the mechanism. After that, the raw rolls of both sides will be
They are alternately used each time the web is exhausted.

Therefore, we aim to improve the operating rate of the packaging machine by using both of the webs mentioned above with good yield, simplifying operations such as replacing old and new rolls and preparing for use.
Of the web rolls that are used alternately, the terminal end of the web that is used first and the start end of the web that is used later are reliably connected at the required timing, There is a need for a means to minimize time loss due to interruptions in the operation of the packaging machine due to the exchange of raw rolls, and at the same time to ensure continuous and effective use of the web.

Prior art and its problems In view of the above-mentioned technical background, conventional techniques for automatically connecting the starting and ending web ends of both raw rolls have been proposed, for example, in JP-A-58-109347 and JP-A-61-115.
The invention disclosed in Japanese Patent No. 820 is known. The former invention relates to an "automatic continuation device for packaging webs" of a cold/thermal connection type that uses double-sided tape as a web connection means and eliminates the need for heat sealing. According to this, the presence or absence of weldability of the web itself, as well as the direction of the welding surface (single side).

Connection using the double-sided tape is possible regardless of whether the double-sided adhesive is used. However, since the bonding method uses double-sided tape, the adhesive strength between the webs is weaker than in the case of thermal bonding (heat sealing), and the stability and reliability of the connection are inferior.

For this reason, especially in packaging machines that require high-speed web feeding, there is a problem in that the web may peel off at the joints.

Furthermore, the former invention is limited to a form in which the web from the raw roll on the trailing side is exclusively connected to the web of the raw roll on the trailing side; Automatic connection of the newly set next user web is not possible, and alternate connection of both webs is not possible. Even if double-sided tape is attached in advance to the starting ends of both webs that are used alternately, be sure to check the direction in which the double-sided tape is attached (rotation change) before attaching each roll of raw material. must be set.

On the other hand, the invention of the connector relates to a "wrapping paper connection method" that enables the starting and end ends of both webs to be connected by either adhesive tape or heat sealing.According to the example of connection using adhesive tape, the former As in the case of the invention described above, connection is possible regardless of whether the wrapping paper has weldability or not, and regardless of the orientation of the welding surface. However, there are still problems such as peeling due to weak adhesive strength and inability to connect newly used wrapping paper to trailing wrapping paper. Furthermore, there is a problem in that it is necessary to check in advance the set position and orientation of both wrapping papers to which adhesive tapes have been attached.

Further, according to the heat seal connection example of the present invention, it is suitable for wrapping paper that can be welded on both sides, but is not suitable for wrapping paper that can be welded on one side.

In other words, if we look at the connecting surfaces of both wrapping papers, we can see that the inner surface of the wrapping paper on the previous use side and the outer surface of the wrapping paper on the next use side are thermally bonded to each other. In the case of weldable paper, it is possible to connect and use it continuously.6However, in the case of single-sided weldability such as composite webs, the bondable and non-bondable surfaces of both wrapping papers face each other, so it is difficult to bond. There is a problem that reliable thermal bonding with stable strength cannot be expected, and the bonding is continued with poor bonding.

For this reason, packaging materials that can be welded on one side have no choice but to rely on the adhesive tape connection method described above. In addition, with this invention, whether adhesive tape adhesion or electric heat adhesion is used, automatic adhesion of newly set next-use wrapping paper to subsequent wrapping paper and alternate connection of both webs can be expected. There are no drawbacks.

Purpose of the Invention The present invention is based on a connection technology that enables heat bonding by always aligning the starting and end ends of the web with the same bonding surface, and provides a good and accurate method for both single-sided welding and single-sided welding. The purpose is to enable stable connections based on adhesion. Another object of the present invention is to enable long-term continuous use by making it possible to alternately connect the respective webs when both web rolls are set in the same posture, and to eliminate the need for changing rotations. be.

Means for Solving the Problems The present invention has been newly proposed to solve the problems inherent in the above-mentioned prior art. On the sealing position side of the web feeding guide of the roll, the starting and ending ends of the respective webs that are used alternately are heat-sealed with their welded surfaces facing each other, and both webs are bonded to the previously used side. The present invention relates to an automatic connection method that enables continuous use of the web by enabling alternating connections including connection with a subsequent user and connection between a subsequent user and a newly set next user.

Further, the automatic connecting device which is another invention of the present application implemented in the above-mentioned method includes a first heat bonding mechanism that connects the leading side web and the trailing side web, and the trailing side web and the next used side web. a second heat bonding mechanism connected to the second heat bonding mechanism; and a web folding mechanism that is connected to the second heat bonding mechanism and is capable of folding and guiding the trailing end of the trailing web to align it with the starting end of the next web. The mechanism is slightly different.

Embodiments Next, the automatic web connection method according to the present invention will be explained below with reference to the accompanying drawings in relation to an apparatus that can suitably implement the method. Since this automatic web connecting device is applied to a web feeding device incorporated in a known bag making, filling and packaging machine, the web feeding device will first be briefly described. This device consists of a first setting section S1 and a second setting section S2 provided vertically in a machine frame, and a raw roll F1. Web f1. is fed out from F2. It basically consists of a first feeding guide section D□ and a second feeding guide section D2 that guide the web, and a feeding guide section P that continuously feeds the web to the packaging machine side. .

The corresponding set shafts 1.1 provided in the first set part S1 and the second set part S2 have web rolls F,
, F are set through the core tube. Also, each set axis 1
, 1, detection levers 2, 2 are arranged so as to be tiltable, and guide elements 4, 4 provided at the tip of each lever 2 come into contact with the outer diameter of the roll, thereby detecting the original fabric roll F t t F. The outer diameter (amount of winding) of 2 is detected. Each detection lever 2, 2 can be switched by means of correspondingly provided switching cylinders 3, 3 between a detection position in the tilted state shown in the drawing and a rest position in the upright state shown in the drawing. Incidentally, the tilting of the levers 2, 2 is always detected by appropriate detection means such as an optical sensor, and the tilting end thereof is defined as the detection end position (core tube detection of the material roll).

The raw rolls F and F2 used here are rolls of the same type made by winding a single-sided weldable composite web, and are set on the set shafts 1, 1 so as to be oriented in the same direction. The webs f□tfz are set to be intermittently fed out with their welded surfaces facing inside. For convenience of explanation, it is assumed that the upper raw fabric roll F□ shown in the two figures is used first, and the lower raw fabric roll F2 is used later.

In the first and second feeding guide sections D and D2, the respective webs f1. f
, is inserted between the pair of guide plates 6, 6 which are arranged at an angle via the 10th lug 5 as shown in the figure, and then the 2nd . After passing through the third roller 7.8, the clamping tool 9 installed on the standby set side
The starting end of the web is held by the holding tool 9. Each clamping tool 9 includes a metal pedestal 9a and a magnetic clamping piece 9b.

In the feeding guide section P, the passed web is passed between three guide rollers 10, 11 and 12 arranged at each section.
The material is intermittently fed forward by a pair of upper and lower main feed rollers 14[deg.]14 whose rotation is controlled by a main feed motor 13 at the front in the feeding direction. In the upward feeding process of the web, a guide plate 15 is vertically disposed on the left side (inside the non-welding surface of the web) as shown in the figure.
Further, a stopper 17 that is switched and operated by a cylinder 16 is disposed on the right side (outside the welding surface of the web) and facing the stopper 17 . Further, a mark sensor 18 is installed above the guide plate 15 to detect registration marks on each web. The above-mentioned stopper 17 is normally held at a rest position separated from the web, and is pushed out to the left in the figure when the cylinder 16 is activated, and functions to temporarily hold the web in contact with the guide plate 15. do.

In addition, in the horizontal feeding process of the web, the first guide roller 1
0 and the second guide roller 11, and a variable adjustment roller (dancer roller) 27 is arranged between the second guide roller 11 and the third guide roller 12 so as to be movable up and down. has been done.

After the web is used up, the auxiliary feeding mechanism A finely adjusts and feeds the used web within a set time, pulls out the remaining end of the web toward the sealing position, and sets it in standby first. This is for aligning with the starting end of the other web. The aforementioned auxiliary feed mechanism A includes a motor 19, as schematically shown in FIGS. 3 and 4.
Two rollers shown in the figure are fitted via bearings to the main driving roller 21 of the main shaft 2o connected to the main shaft 2o, and to the eccentric part of the switching slave shaft 23 connected to the rotary switching tool 22 above the roller 21. It is provided with driven rollers 24, 24. And each set part S1. By rotating the switching tool 22 in response to detection by the detection levers 2, 2 on the S side, the driven rollers 24, 24 are switched and held between a feed position where they can rotate together with the main driving roller 21 and a rest position where they are separated and retracted. . For the main drive roller 21, there is an encoder that controls the motor 19 by pulse counting the number of rotations of the roller 21.
25 are linked via a transmission means 26.

- The force adjustment variable roller 27 is the 20th roller 11 and the 30th roller 11.
A hairpin-like hook between the roller 12 and the roller 12 can guide the web being passed while adjusting the stock, and is set to be movable up and down depending on the web feeding conditions. This roller 2
Three pairs of sensors 28, 29 and 30 are arranged in upper and lower three stages on both sides during the displacement process in which the sensor 7 moves up and down. Each sensor 28, 29, 30 detects the displacement of the roller 27 and the amount of web interposed between the second guide roller 11 → variable adjustment roller 27 → third guide roller 12, and each sensor 28, 29, 30 The stopper cylinder 16 is controlled to open and close. That is, when the roller 27 passes the detection surface of the upper sensor 28, the stopper 17 is in the open position, and when the roller 27 passes the detection surface of the middle sensor 29 and the lower sensor 30, the stopper 17 is in the closed position (
web pressing position).

Note that the setting conditions, operation timing, etc. for each of the above-mentioned members will be explained each time in connection examples to be described later.

Among the web feeding devices described above, the automatic web connecting device according to the present embodiment includes a first heat bonding mechanism H1 installed on the standby set side of the starting end of the first feeding guide portion D1, and a second feeding guide portion D1. It includes a second heat bonding mechanism H2 installed on the standby set side of the starting end in D2, and a web folding mechanism provided opposite to the second heat bonding mechanism H2 side. In the illustrated example, the upper stage is the second heat bonding mechanism H2, and the lower stage is the first heat bonding mechanism H1, both of which employ the impulse seal method. Further, as shown in FIGS. 1 and 5, the first heat bonding mechanism H1 and the second heat bonding mechanism H2 are connected to the corresponding feeding guide portion D1. D, the third
It includes a seal stand 31 installed between the O-ra 8 and the clamping tool 9, and a crimp piece 32 located above the seal stand 31 and operated by a cylinder 33. Then, the pressure bonding piece 32 is lowered together with the rod 34 by the operation of the cylinder 33, and the starting and ending portions of both webs are sandwiched between the sealing base 31 and the pressure bonding piece 32 and bonded by heating. In addition, the surface heating adhesion mechanism H type.

Although not shown, H2 is equipped with a suitable cutting mechanism (cutter), which cuts the unnecessary part of the web in synchronization with the heat bonding.

However, the lower first heat bonding mechanism H8 is attached to the leading side web f1.
The upper second heat bonding mechanism H2 is responsible for connecting the leading web f0 newly set to the trailing web f2. The sealing time (heating time of the seal 31, operating time of the cylinder 33, etc.) is set by counting using an impulse timer. Further, the mutual seal surfaces of the seal stand 31 and the crimp piece 32 are formed to have a length that matches the width of the web, and are non-welded to the web.

The folding mechanism is for folding and guiding the terminal end of the trailing web before the web is connected by the second heat bonding mechanism H2, and as schematically shown in FIG.
A pair of pinions 37 and 37 are reciprocally rotated in synchronization with each other via a transmission means 36 such as a gear, chain, or belt for a reversible control motor 35. The relevant pinion 37, 37
A pair of reciprocating support rods 38, 38 are connected to each other via racks 39, 39, and an insertion rod 40 is connected between the tips of both support rods 38, 38. and control motor 35
is driven at an appropriate timing, the insertion rod 4
0 is reciprocated in a direction perpendicular to the first feed process portion of the second web f2, and when moving forward, the terminal end of the web f2 is folded horizontally, and the adhesive surface is turned inward (downward in the figure) to seal the sealing base 31. and the crimp piece 32, and seal the base 31.
The adhesive surface is aligned oppositely to the starting end of the first web f, which is set on standby on the side.

However, the insertion rod 40 is formed to be longer than the web width by an appropriate dimension, so that the crimp piece 32 can move up and down between the two reciprocating support rods 38, 38. Further, the control motor 35 is driven by receiving input signals after the auxiliary feed motor 19 stops and after the sealing cylinder 33 is activated, and is driven by detection switches 41 and 42 disposed before and after one reciprocating support rod 38 side. is stopped each time the ON operation is performed. The detection switches 41 and 42 detect the forward end and backward end positions of the insertion rod 40, and are turned ON when operated by the contact piece 43 formed on the reciprocating support rod 38, for example. . Other types of folding machine ft1WL will be described later.

Next, regarding the method of connecting webs carried out in conjunction with the operation of the apparatus according to the present embodiment, first, an example of connecting the webs from the leading side to the trailing side will be explained in the order of steps with reference to FIG. 1. That is, as shown in FIG. 1(a), the web f□ fed out from the first roll Fi on the preceding use side passes through the feeding guide D1 and is packaged according to the operation of the feeding guide P. It is continuously fed to the machine side. At this time, the web f2 of the second raw roll F2 on the trailing use side is pulled out to the standby set side via the feeding guide part D2 as shown in FIG. The welding surface side is brought into contact with the seal stand 31 facing upward, and its starting end is held by the holding tool 9.

When the first side web f1 is used up in this state,
Based on the detection by the tilting of the detection lever 2, preparations for connection with the second side web f2 are made. That is, when the raw roll F1 becomes empty, the detection lever 2 shifts to the right tilted end in the figure and detects "r-web end". Even after this detection, the web remains in an automatic feeding state for a while, and the web part (a predetermined number of registration marks) extending from the first set shaft 1 side to the sealing position of the first heat bonding mechanism H1 (referring to the web length corresponding to the pitch) is the main drive side roller 14,1
4 (during this period, each time the variable adjustable roller 27 descends below the middle sensor 29, the stopper 17 closes and clamps the web between the guide plate 15, and the upper sensor 28 When the web rises higher, the stopper 17 opens and releases the web).

In this process, the mark sensor 18 detects a registration mark at a predetermined position (predetermined number) from the end of the web, and based on the detection signal, the main feed motor 13 stops, and the driven roller 24 moves to the feed position. web feeding is stopped.

Based on the detection by the detection lever 2, in the auxiliary feeder WL, the switching tool 22 switches the driven roller 24 to the feeding position, and the motor 19 is driven to slowly adjust and transport the web f1 by both rollers 21 and 24. (low speed auxiliary feed). After the start of this fine adjustment feed, the encoder 25 is in a pulse count detectable state with respect to the rotation of the driving side roller 21, and when the mark sensor 18 detects a mark, the encoder 25 counts and detects a preset number of pulses. , the auxiliary feed motor 19 is stopped and the fine adjustment feed is completed.

Note that at the end of the fine adjustment feed, the terminal end of the first side web f is sent to a predetermined portion above the pressure bonding piece 31 in the first heat bonding mechanism H1, and its bonding surface is first transferred to the first side web f, which is set on standby. The registration marks (printed patterns) at predetermined positions facing the adhesive surfaces at the starting ends of the second side web f and at the starting and ending ends of the second web f are aligned as set.

At the end of the web fine adjustment feeding by the auxiliary feeding mechanism A described above, the first heat bonding mechanism H1 is activated to connect the web. That is, the cylinder 33 is energized based on the pulse count-up signal of the encoder 25, as shown in FIG. 1(b).

The crimp piece 32 descends to the sealing position, and clamps the starting and ending ends of both webs f1tf2 with the sealing stand 31 (equipped with a cutter) and heat-bonds them. This heat bonding is performed in the order of the 1-hour setting, that is, sealing impulse ON, timer count, sealing impulse OFF, cutter impulse ON, timer count, cutter impulse OFF.
This is done in the order of F settings. After the seal crimping timer counts up, the cylinder 33 is reversely biased and the crimping piece 32 returns to its original rest position. By this impulse type heat sealing, both webs f, , f are stably connected with high reliability by good welding. Also, the excess connection type parts on both sides are cut off to complete the web connection.

After the connection of the webs is completed, the detection lever 2 of the first side web f1 is switched to the rest position, and then after a predetermined time (
After the timer counts up) the detection lever 2 of the second side web f2 tilts downward and comes into contact with the second web roll F2. Further, after a predetermined time, the main feeding motor 13 is started to be driven, and the web feeding by both rollers 14, 14 is resumed.
A second web f follows the remaining end portion of the first web f1.
2. Shift to steady feeding.

When resuming feeding, as the web portion stocked between the second guide roller 12 and the third guide roller 12 is sent out, the variable adjustment roller 27 is pulled up by the stock portion and the upper stage sensor Displaced to the 28 side. When the roller 27 passes through the detection surface of the upper stage sensor 28, the driven roller 24 of the auxiliary feed mechanism A is switched and returned to its original rest position. Further, on the first setting section S1 side, a new web roll F1 of the same type to be used next time is similarly set, but at this time, the web start end is placed in the second heat bonding mechanism 1-I with the adhesive surface facing upward. , is pulled out onto the upper surface of the sealing stand 31 and held by the holding tools 9, and is in a standby preparation state.

Next, an example of the connection from the second side of the web to the first side will be described with reference to FIG. 2. This connection example is performed based on the cooperative operation of the second heat bonding machine ellipse H2 and folding a411L. That is, as shown in FIGS. 2(a) and 2(b), (1) When the web f2 from the second web roll F1 is used up, based on the detection of "end of web" by the detection lever 2,
The web is automatically fed over a length corresponding to a predetermined number of registration marks. Further, when the mark sensor 18 detects a predetermined registration mark, the main feed motor 14 is stopped and automatic feeding is stopped.

(2) During the intermittent feeding process of the main feed motor 14, the position of the variable adjustable roller 27 is detected by the intermediate or lower sensors 29, 30, and the end portion of the web is held by the stopper 17 by the operation of the cylinder 16.

(2) The driven roller 24 of the auxiliary feeding mechanism A is switched to the feeding position, and the motor 19 is started to start fine-adjustment feeding of the web. Further, upon detection of a predetermined number of pulse counts by the encoder 25, the auxiliary feed motor 19 is stopped, and the fine adjustment feed is completed.

Connection is started after the above preparation control steps are performed.

Regarding such a connection, the folding mechanism is first activated after a predetermined period of time after the motor 19 of the auxiliary feed mechanism A is stopped. In other words, both pinions 37 are driven by the normal rotation of the motor 35.
, 37 are rotated, thereby the two reciprocating rods 38, 38 move forward, and the insertion rod 40 is advanced and stopped at a predetermined position. As a result, as can be seen from FIG. 2(b), the end portion of the second web f2 located on the first feed start side of the feed guide portion P.

It is horizontally folded to the left in the drawing by the insertion rod 40. At this time, the terminal end of the second web f2 is inserted below the pressure bonding piece 32 of the second heat bonding mechanism H2 with its adhesive surface facing downward, and the adhesive surface at the starting end on the standby set side of the first web f1 is aligned with the adhesive surface of the first web f1. They end up facing each other. However, based on the fine adjustment feed by the auxiliary feed mechanism A and the folding insertion amount by the folding mechanism, the registration marks at the starting and ending ends of both webs f, f□ are aligned with each other.

While the insertion rod 40 is stopped at the forward end, the second heat bonding mechanism H2 is operated, and the crimp piece 32 is lowered by the forward movement of the sealing cylinder 33 to form a web between it and the sealing base 31. As in the connection example described above, both webs are sealed and cut based on the temporal ON/OFF of the impulse. After the seal timer counts up, the cylinder 33 is operated again to raise the crimp piece 32 back to its original rest position. Next, the motor 35 of the folding mechanism is driven in reverse, and the insertion rod 40 is returned to its original position, completing the connection process.

From this point on, the detection lever 2 on the first set section S2 side is switched to the rest position as before, and the detection lever 2 on the first set section S0 side comes into contact with the web opening of the first web f□. Then, the driving of the main feed motor 13 is started. Further, the driven roller 24 of the auxiliary feed mechanism A is returned to the rest position by canceling the position detection of the middle stage sensor 29 and the lower stage sensor 30 in response to the upward displacement of the variable adjustment roller 27. As a result, a new first web f□ is continuously fed following the previous second web f2.

(Modification example) The device implemented in the web automatic connection method according to the present invention is:
It is also recommended to adopt a different type from the configuration described above. For example, in the case of the first heat bonding mechanism H1 and the second heat bonding mechanism E (, the crimping piece 32 is a stationary type, and conversely, the sealing base 31
can be made movable. As for the web folding mechanism, it is possible to adopt an insertion type and a suction type. In the former type, as shown schematically in FIG. It is conceivable that an insertion rod 40 is connected between a pair of connected chains 38A, 38A. In the latter type, as schematically shown in FIG. 7, a suction tube 46 connected to a rod 45 of a cylinder 44 is connected to a suction means 47 at the rear (left side in the figure) of the second heat bonding mechanism H2. Example configurations are recommended.

In addition, in one movable plate, the first line guide portion D shown in the figure
1, the 20th la 7 and the 30th la 8, the cylinder 33 of the first heat bonding mechanism H2. The sealing stand 31 of the second heat adhesion mechanism H2 and further the first clamping tool 9 may be installed so that the overall position can be changed in units of movable plates. According to this, when the second side web f2 is used, work related to feeding out the starting end of the newly set first web f1, standby setting, and preparation work can be performed easily and safely.

Effects of the Invention In the automatic web connection method according to the present invention, as can be understood from the explanation given regarding the embodiment, both the leading and trailing webs are alternately fed each time they are exhausted, and each Continuation of automatic web feeding for a predetermined number of registration marks based on the detection of the end of the web of the original fabric roll, automatic feeding suspension based on the registration mark detection, and subsequent web termination performed after the automatic feeding interruption. In the web feeding process, fine-adjustment feeding to the sealing position and preparation control process for alignment of the adhesive surfaces of the terminal end and the standby starting end of the next use side web are performed.

After the web of the original web roll on the preceding use side is finished, the terminal end of the preceding web, which has been finely adjusted and fed to a predetermined position, and the standby starting end of the trailing side web are heat bonded by the first heat bonding means.

After the end of the web of the original roll on the trailing use side.

The terminal end of the trailing web that has been finely adjusted and fed to a predetermined position is folded and guided to the sealing position side of the second heat bonding means by a folding operation, and is bonded to the starting end of the leading web that will be used next time. The two webs are aligned on their surface sides, and the starting and end portions of both webs are heat-bonded based on the second heat-bonding operation.

Therefore, according to the web connection method according to the present invention.

Since the starting and ending ends of each other are aligned and heat bonded on both sides of the adhesive, it is possible to bond well and appropriately not only webs that have adhesive properties on both sides, but also webs that have adhesive properties on only one side. It can be glued. ``Unlike the double-sided tape connection method, a highly reliable connection with stable adhesive strength can be achieved, and the advantage is that it can be used for high-speed web feeding.

Moreover, in the method of the present invention, the above-mentioned first method. Based on the second heat bonding step, not only the trailing web can be automatically connected to the leading web, but also the leading web to be used next time can be automatically connected to the trailing web. Therefore, it is possible to easily connect the two webs alternately to enable long-term continuous feeding of the web, thereby increasing the operability of the web-using equipment.

Further, in the automatic connecting device of the present invention implemented in the automatic connecting method described above, the web feeding device alternately feeds both webs at each end, and includes a sealing stand for receiving the starting end of the trailing web. , a first heat bonding mechanism having a crimping piece facing the sealing base and installed on the outer side of the leading-side web feeding chain; a sealing base for receiving the starting end of the leading-side web; and the sealing base. and a second crimp piece facing the
and a folding mechanism having a folding member that is connected to an appropriate drive means such as a motor or a solenoid and can reciprocate between the sealing base and the crimping piece in the second heat bonding mechanism. Based on the operation of the first heat bonding mechanism after the end of the leading web, the terminal end of the leading web and the starting end of the trailing web are held between the sealing base and the crimping piece. - The folding mechanism and the second
Based on the cooperation with the heat adhesion mechanism of in,
Similarly, it can be sandwiched and heat bonded.

Therefore, according to the web connecting device according to the present invention, as well as the effects achieved by the method described above, stable connections can be realized based on good and appropriate adhesion for both single-sided adhesive and double-sided adhesive webs. Moreover, by alternately connecting both webs, the web can be continuously fed for a long period of time, and the operability of the equipment using the web can be improved. It also has the beneficial effect of eliminating the need to change the rotation of the raw rolls.

[Brief explanation of the drawing]

The figure shows a preferred embodiment of the automatic web connection device according to the present invention, and FIGS. 1 and 2 are explanatory diagrams schematically showing the outline of the web feeding device and automatic connection device according to the present embodiment. 1(a) and (b) show the feeding state and connection state of the leading side web, and FIGS. 2(a) and (b) show the feeding state and connection state of the trailing side web. Each step is shown step by step,
3 and 4 are a front view and a side view schematically showing the auxiliary web feeding mechanism, and FIG. 5 is a perspective view schematically showing the main parts of the apparatus (mainly the folding mechanism and the second heat bonding mechanism). , 6 and 7 are plan views schematically showing different types of automatic connection devices, respectively. 1...Set axis 2...Detection lever 5.7
, 8... Roller 9... Gripping tool 10.11, 1
2...Roller 13...Main feed motor 14...Main feed roller 1
7... Stopper 18... Mark sensor 19
... Auxiliary feed motor 21 ... Main drive roller 24 ...
・Followed roller 25... Encoder 27... Adjustable variable roller 28, 29, 30... Sensor 31... Seal stand 32... Crimping piece 33...
- Cylinder 35... Control motor 40... Insertion rod Sl, S,... Set part F1. F,
... Original fabric roll fl, f, ... Web D1. D2
...Feeding guide part P...Feeding guide part A...Auxiliary feeding mechanism H,
, H2... Heat bonding mechanism L... Folding mechanism Patent applicant Fujikikai Co., Ltd. FIG, 4 ゝ-H2 FIG, 3 FIG, 6 FIG, 7

Claims (1)

[Scope of Claims] [1] A pair of raw fabric rolls with a web wound thereon are provided, and the starting end of the web from one of the raw fabric rolls is pulled out in advance to a predetermined sealing position to wait for connection; In an automatic web connecting method, in which a web from a raw roll is fed intermittently for use, and when the web is used up, the end of the web is connected to the start end of the waiting web. , detects the end of the web of the original roll on the preceding use side, finely adjusts and feeds the end of the web to a predetermined position, and moves the end of the preceding web and the standby start end of the trailing web to the sealing position. Detecting the end of the web of the raw roll on the trailing use side and finely adjusting and feeding the end of the web to a predetermined position, and The terminal end of the web is guided to the sealing position side where the second heat bonding means is provided by a folding operation, and the bonding surface side is placed on the starting end of the leading side web which has been set in advance and is waiting for next use. a step of aligning; and a step of activating a second heat bonding means after the alignment is made to heat bond the terminal end of the trailing web and the standby starting end of the leading web for next use. A method for automatically connecting continuous web-like materials, characterized in that: [2] Based on the detection of the end of the web on each web roll, automatic web feeding continues for a length corresponding to a predetermined number of registration marks, automatic feeding stop based on registration mark detection, and sealing position at the end of the web 2. The automatic web connection method according to claim 1, wherein the fine adjustment feed is performed. [3] A pair of web rolls are provided, the starting end of the web from one web roll is pulled out to a predetermined sealing position in advance, and the web from the other roll is waited for connection. In an automatic web connecting device, the trailing web is fed intermittently for use, and when the web is used up, the end of the web is connected to the starting end of the waiting web. a sealing base that receives the starting end of the web at the sealing position; and a crimping piece that faces the sealing base and is located on the outside of the lead-out part of the leading web,
A first heat bonding mechanism capable of connecting the trailing web to the leading web, a sealing base for receiving the starting end of the leading web at the sealing position, and a crimping piece disposed opposite to the sealing base. a second heat bonding mechanism capable of connecting the leading side web to be used next to the trailing side web; and folding of the web by a reciprocating folding member driven in synchronization with the second heat bonding mechanism. A folding mechanism for guiding, and in the first heat bonding mechanism and the second heat bonding mechanism, the sealing base or the crimping piece is moved to a sealing position by an appropriate switching operation means operated based on a sealing start signal. At the same time, the sealing base and the crimping piece are set to sandwich and heat bond the end portions of both webs to each other, and in the folding mechanism, the folding member is moved forward before starting sealing. The terminal end of the trailing web is folded between the sealing base of the second heat bonding mechanism and the crimp piece, and after aligning with the standby starting end of the leading web to be used next time, it returns to the rest position in a timely manner. An automatic web connection device characterized in that it is configured to