JP3340101B2 - Method and apparatus for sticking a sheet piece to a continuous long base material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for attaching a synthetic resin sheet to a continuous synthetic resin base material by welding.

[0002]

2. Description of the Related Art Conventionally, bags made of synthetic resin films have been widely used, for example, as merchandise packages for displaying and selling various merchandise at stores, and synthetic paper or thick synthetic resin is provided on the upper part of the bag. It is known to provide a header core material made of a sheet.

[0003] A bag-making method of such a bag is generally a side seal method. In this case, a core material for a header is applied to a continuous long strip-shaped base material formed by half-folding a film. After inserting and welding a continuous elongate tape-shaped sheet material for constituting, the base material integrated with the sheet material is intermittently transported in the longitudinal direction of the band, and blown in the band width direction, that is, the side. By sealing, a bag with header for one sheet is obtained. Therefore, in a bag made by such a side seal method, a header core material is generally arranged inside the bag. That is, the core material for the header is a so-called “inside attachment”.

On the other hand, for example, according to the bag making method of the side gusset type proposed by the present applicant, a gusset part bent inward in a V-shaped section is provided on both side edges. In order to provide a bag, after forming gusset portions on both side edges of a band-like film formed by half-fold polymerization, a header is transferred while a continuous long base material having such gusset portions is transferred in the longitudinal direction. Since the core material is attached, the header core material is welded to the outer surface of the base material. That is, the core material for the header is a so-called “outside attachment”.

Therefore, conventionally, the present applicant has proposed an "outside attachment".
In the step of intermittently transporting a continuous long base material provided with a gusset portion in the longitudinal direction to form a header, the tape-like sheet material is intermittently interposed in a direction perpendicular to the longitudinal direction with respect to the stopped base material. The core material for the header is separated and formed by fusing the tape-shaped sheet material superposed in the width direction of the substrate along the side edge of the substrate, and the core material for the header is formed on the substrate. Welded.

[0006]

However, the above-mentioned side gusset type bag-making method has a structure in which the tape-like sheet material is fed from a direction perpendicular to the direction in which the substrate is transported. Since the transfer line for the tape-shaped sheet material is arranged in a protruding state on the side of the transfer line, there is a problem that the bag making machine as a whole becomes large and requires an installation space. (2) It is necessary to intermittently stop the base material from the start of feeding the tape-shaped sheet material to the end of fusing and welding, and the stopping time is relatively long,
There is a problem in bag making efficiency per hour. (3) When the tape-like sheet material fed as described above is blown, not only high precision is required because the tape-shaped sheet material is made to conform to the side edges of the base material, but also a malfunction occurs and the base material itself is blown at the same time. On the other hand, if the tape-like sheet material is blown off slightly outside the side edge of the base material to ensure safety, there is a problem that the header core material protrudes from the side edge of the bag after bag making. .

[0007]

SUMMARY OF THE INVENTION The present invention provides a method and apparatus which solves the above-mentioned problems in the bag-making technology, but at the same time, a continuous elongated material applicable to various technologies other than the bag-making technology. A method and an apparatus for attaching a sheet piece to a base material.

Therefore, the method according to the present invention comprises a step of intermittently transferring a continuous long substrate made of synthetic resin in the longitudinal direction, and a step of transferring the substrate toward the surface of the substrate. A step of intermittently transferring a continuous long sheet made of synthetic resin in the same direction as the direction, and starting the intermittent transfer of the sheet in a state in which a molten portion is formed by fusing at the leading end of the sheet, and melting In the temporary fixing state where the portion was contact-welded to the surface of the base material, after the sheet material was transferred integrally with the base material, a step of simultaneously stopping the base material and the sheet material; and A step of separating and forming a sheet piece temporarily fixed to the base material through the melting portion by fusing, and a step of firmly welding the sheet piece to the base material.

At this time, after a fusion zone is formed by fusing at the leading end of the sheet material, the intermittent transport of the sheet material is started during the intermittent transport of the base material, and the molten portion of the sheet material is placed on the surface of the base material being transported. Can be made to contact weld.

Alternatively, after forming a fusion zone by fusing at the leading end of the sheet material, intermittent transfer of the sheet material is started when the substrate is stopped, and the fusion zone of the sheet material is contact-welded to the surface of the stopped substrate. It is good also as a structure to make it.

Further, the apparatus of the present invention is constituted as means by means of a base material transferring means for intermittently transferring a continuous long base material made of synthetic resin in the longitudinal direction, and the base material facing the surface of the base material. A sheet material transfer means for intermittently transferring a continuous long sheet material made of synthetic resin in the same direction as the material transfer direction, and a leading end of the sheet material by fusing the sheet material in a width direction while the sheet material is stopped. Fusing means for forming a fusion zone, and welding means for firmly welding the sheet material and the base material on the downstream side in the transport direction from the fusing means, wherein the fusing means comprises a tip portion of the sheet material. Guide means for guiding the sheet material so as to intersect at an acute angle with respect to the surface of the base material; and a fusing blade for fusing the sheet material in the width direction in the vicinity of the leading end of the guide means. After starting the transfer, the leading edge of the sheet material When it is positioned to face the welding unit lies in comprising controlled to stop at the same time as the substrate transfer means.

In an embodiment of the present invention, a holding plate is provided between a sheet material located above the guide means and a fusing blade which is moved forward and backward with respect to the sheet material.
The cutting edge of the fusing blade protrudes toward the sheet material at a position downstream of the holding plate with respect to the transfer direction of the sheet material,
The holding plate is arranged so as to be closer to the sheet material than the cutting edge of the fusing blade, and is supported by the fusing blade so as to be able to retreat freely via a spring, so that the fusing blade advances toward the sheet material. When the holding plate contacts the sheet material, the cutting edge of the fusing blade contacts the sheet material.

Further, in the embodiment of the present invention, the welding means comprises a support means for supporting the base material, and a clamping means which is moved forward and backward so as to clamp the overlapped portion of the base material and the sheet material between the support means. Means, and a welded body which is moved forward and backward so as to be pressed against the overlapping portion of the base material and the sheet material through a window provided in the support means, and the support means includes a cooling means. I have.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings.

(One Application Example of the Present Invention) FIG.
As an application example, the above-described side gusset type bag making method is shown.

As shown in FIG. 5 (A), the front and back film portions 1a, 1a, 1b are folded back from the synthetic resin film which is unwound from the roll and continuously transferred in the traveling direction F.
In providing b, the folded portion is bent inward into a substantially V-shaped cross section to form the first gusset portion 2 on one side, and the extension of the back film portion 1b extended in the folding direction is formed in a cross section. The second gusset portion 3 on the other side is formed by bending the second gusset portion 3 into a substantially V shape, and the free edge portion 4b of the back film portion 1b and the free end portion of the front film portion 1a extended from the second gusset portion 3. By overlapping the edges 4a with each other, the film overlap portion 4 can be formed. Subsequently, a welding edge 6 is formed by fusing and / or welding the film overlapping portion 4 by seam welding means 5,
Thus, a continuous elongated tube body 1 having gusset portions 2 and 3 on both sides is formed. This tube body 1
The base material 7 to be a semi-finished bag is formed.

The tube body 1 is then intermittently transferred via a step roll or the like with the longitudinal direction as the traveling direction F, as shown in FIG. 5 (B).
A sheet piece 9 formed by cutting a continuous long (for example, tape) sheet material 8 made of synthetic paper or a thick synthetic resin sheet is superposed on the surface of the base material 7 and welded 10. Thereafter, in the second stage S2, the hanging means 11 is formed by punching out the sheet piece 9 and the base material 7 by fusing means or the like, and further, in the third stage S3, the base material 7 is moved along the sealing piece 9. By dividing
One bag 12 is sequentially obtained. Therefore, the suspension means 1
The header portion 13 is formed by the seal piece 9 provided with 1, and the bag body 12 with the gusset portions 2 and 3 whose bottom portions are opened is formed.

In such a side gusset type bag making method, an embodiment of the present invention as described below is implemented as a method of attaching the sheet pieces 9 in the first stage S1. However, in the present invention, in addition to the case of forming a header portion in such a bag making method, various sheet pieces such as decoration or advertisement labels are attached to a base material as a semi-finished bag product. It should be appreciated that the present invention can be widely applied to a case other than bag making and a case where it is necessary to attach a sheet piece to a continuous long base material.

(Embodiment of Apparatus of the Present Invention) As shown in FIG. 1, a base material 7 is a continuous long body made of a synthetic resin such as a tube 1 as a semi-finished bag described in the first application example. The substrate is intermittently transported in the longitudinal direction by the substrate transporting means in the traveling direction F. Such a substrate transfer means is a conventionally known means such as a nip roll which is intermittently driven and rotated while holding the substrate, and is not shown.

The continuous long sheet material 8 made of synthetic resin made of synthetic paper or the like is fed from a wound roll, passes through a tension means 14, a guide roller 15, and the like. The substrate is intermittently transported toward the surface of the substrate 7 in the same direction as the transport direction F of the substrate. The tensioning means 14 includes a first roller 17 for winding the sheet material 8 fed from the roll, and a second roller 18 for rewinding the sheet material 8 having passed through the first roller 17 to the swing frame 19 in a substantially parallel state. It is pivoted. The swing frame 19 is swingably supported by a device base frame (not shown) via a support shaft 17 a coaxial with the first roller 17, and a tail end of the swing frame 19 (second roller A biasing means 20, such as a weight, is provided at the end opposite to 18). Therefore, the swing frame 19 is constantly urged by the urging means 20 in the direction in which the second roller 18 is lifted, that is, in the direction of the arrow U in the drawing. Therefore, after passing through the second roller 18, the guide roller 1
The sheet material 8 wrapped in the folded shape by the sheet feeding device 5 and heading toward the sheet material transfer means 16 includes a second roller 18 and a guide roller 1.
Tense between five.

The sheet material transfer means 16 is composed of a driving roller 16a and a driven roller 16b arranged with the sheet material 8 interposed therebetween. The driving roller 16a is driven and rotated by an intermittent driving means 21 such as a servo motor.

The feeding end region of the sheet material 8, that is, the region from the guide roller 15 to the surface of the base material 7 via the sheet material transfer means 16 is substantially linear, and the feeding end region is based on the feeding end region. It is arranged so as to intersect the surface of the material 7 at an acute angle. In such a linear feeding end area, the leading end 8a of the sheet material 8 extending from the sheet material transporting means 16 toward the base material 7 is guided from below by a guide means 22 fixed to the apparatus base frame. Supported.

A fusing blade 23 for fusing the sheet material 8 in the width direction is disposed in the vicinity of the leading end of the guide means 22. The fusing blade 23 is an advance / retreat driving means such as a cylinder device provided on the apparatus base frame. 24a, and is heated by a heater provided inside. A holding plate 24 is provided between the tip 8 a of the sheet material 8 located on the guide means 22 and the fusing blade 23.
The holding plate 24 is connected to a bracket 25 provided above the fusing blade 23 via a rod 26 so as to be able to advance and retreat, and a spring 27 such as a coil spring externally inserted into the rod 26. It is supported by
At this time, a nut 28 is screwed through a threaded portion to the insertion end of the rod 26 that has penetrated the bracket 25, and the holding plate 24 and the fusing blade 23 are adjusted by adjusting the nut 28.
Are configured to be adjustable.

The fusing blade 23 has a cutting edge 23a protruding toward the sheet material 8 at a position downstream of the holding plate 24 in the transport direction of the sheet material 8. Therefore, when the holding plate 24 moves forward together with the fusing blade 23 by operating the advance / retreat driving unit 24a, first, the holding plate 24 comes into contact with the sheet member 8 so that the sheet member 8 (the front end portion 8a) is guided by the guide unit 22.
And the holding plate 24, and then the fusing blade 23 is further advanced to fuse the sheet material 8 (the distal end portion 8a) by the cutting edge 23a. A heat-resistant layer 30 made of Teflon (trademark) is laminated on the upper surface of the guide means 22 via an elastic layer 29 made of silicon or the like so as to appropriately support the blade edge 23a (see FIG. 2). Thus, a fused portion 8b is formed at the fusing end of the sheet material 8 that has been blown by the cutting edge 23a.

A welding means 31 for firmly welding the sheet material 8 and the base material 7 is provided downstream of the cutting blade 23 in the transport direction of the base material 7. The welding means 31 includes a support means 32 for supporting the base material 7 from below, and a support means 32 from above.
And a welded body 35 directed to the base material 7 via a window hole 34 provided in the support means 32.

The holding means 33 is constituted by connecting a holding plate 36 disposed above the base material 7 to a forward / backward driving means 37 such as a cylinder device fixed to the apparatus base frame.

On the other hand, the support means 32 is disposed in contact with the lower surface of the base material 7 and is fixed to the apparatus base frame, and includes a cooling means 38 such as a passage for circulating cooling water therein.
And a number of slit-shaped window holes 34 are arranged in the width direction of the base material 7. The welded body 35 is heated by a heater provided therein and is provided with welding teeth 39 that can be inserted into the window hole 34 and is connected to advance / retreat driving means 40 such as a cylinder device fixed to the device base frame. Have been.

In the illustrated embodiment, the holding means 33 is disposed above the base material 7, and the supporting means 32 and the welded body 35 are provided below.
Are arranged, but they may be arranged upside down.

(Embodiment of the Method of the Present Invention) As described above,
The substrate 7 is intermittently transported in the longitudinal direction F by a predetermined transport stroke by the substrate transporting means.
Is intermittently transported in the same direction F by a sheet transporting means 16 at a predetermined transport stroke. Both the transfer stroke of the base material 7 and the transfer stroke of the sheet material 8 can be set to desired strokes according to the distance from the start position of the intermittent transfer to the welding means 31.
When the transfer is completed, that is, at the time of stop, the timing is controlled so as to be simultaneous.

In the state shown in FIG. 1, a fusion portion 8b is formed at the leading end of the sheet material 8 by the cutting edge 23a, and the fusion blade 23 is retracted by the advance / retreat driving means 24a. The holding plate 24 is retracted from the sheet material 8. Therefore, as shown in FIG.
When the intermittent transfer of the sheet material 8 is started by the sheet material transfer means 16, the sheet material 8 advances while being guided by the guide means 22, and the fused portion 8 b is contact-welded to the surface of the base material 7. That is, the molten portion 8b is welded at the same time as it comes into contact with the base material 7, and the advanced end of the sheet material 8 is temporarily fixed to the base material 7.

In such a temporarily fixed state, the sheet material 8 and the base material 7 are integrally transferred, and as shown by a dashed line in FIG. 2, the molten portion 8b of the sheet material 8 is moved to a predetermined position of the support means 32. When transported, the base material 7 and the sheet material 8 are stopped simultaneously. That is, the base material transfer means and the sheet material transfer means are controlled so as to be simultaneously stopped by a control circuit or the like.

At this time, the sheet material 8 and the base material 7 in the temporarily fixed state are
In order to simultaneously transfer the sheet material, the base material transferring means and the sheet material transferring means 16 are designed so that the feeding speeds are the same. However, it is usually difficult to maintain exactly the same speed because the actual operation is affected by various conditions. For example, when the substrate 7 is a film-shaped tube body 1 as in the application example, it is inevitable that minute expansion and contraction occur due to tension or the like during transportation. Is also affected by expansion and contraction due to temperature, humidity, and the like. Therefore, it is inevitable that a speed difference occurs between the feeding speeds of the base material 7 and the sheet material 8. However, when the temporary fixing state as in the present invention is not formed, the base material 7 and the sheet material 8 are simultaneously When stopped, there is a possibility that the leading end of the sheet material 8 may not be accurately located at a desired design position of the base material 7.

In this regard, according to the present invention, as described above, the molten portion 8b at the leading end of the sheet material 8 is temporarily fixed to the surface of the base material 7, so that the temporarily fixed position is set to a predetermined position. There is an advantage that it is not necessary to consider a subsequent speed difference only by setting correctly. For example, as a first method, if the transfer speed of the sheet material 8 is set to be slightly higher than the transfer speed of the base material 7, the sheet material 8 tends to be sent out beyond the base material 7. However, since the molten portion 8b at the front end is temporarily fixed, the front end of the sheet material 8 does not precede the base material 1 beyond the temporarily fixed portion,
The sheet material 8 is temporarily fixed to the fused portion 8b and the guide means 22.
Appears to loosen in an arc between and. Therefore, the fusing blade 23
After the sheet material 8 is blown off by welding, welding by the welding means 31 may be performed. Further, as a second method, if the transfer speed of the sheet material 8 is set to be slightly lower than the transfer speed of the base material 7, the sheet material 8 is transferred slightly behind the base material 7. However, the sheet material 8 is pulled by the base material 7 by the temporary fixing portion of the welding portion 8b, and is transported while slipping the sheet material transporting means 16.

When the intermittent transfer of the base material 7 and the sheet material 8 is completed and stopped at the same time, the sheet material 8 is blown off by the fusing blade 23 as shown in FIG. The sheet piece 9 cut and formed from is firmly welded to the surface of the base material 7 by welding means 31. The fusing by the fusing blade 23 and the fusing by the fusing means 31 are preferably performed after fusing is performed first, but may be performed in the reverse order, or may be performed simultaneously.

As described above, when the holding plate 24 is advanced together with the fusing blade 23 by operating the advance / retreat driving means 24a, first, the holding plate 24 comes into contact with the sheet material 8 so that the sheet material 8 is guided by the guide means 22. And the holding plate 24. Since the holding plate 24 can be retracted by the rod 26 against the spring 27, the fusing blade 23 is further advanced, and the sheet material 8 is blown off by the blade edge 23a. The cutting edge 23a melts the sheet material 8 and the sheet material 8
The next fused portion 8b is formed at the fused edge of
2 supported by the heat-resistant layer 30. After that, the fusing blade 23
The holding plate 24 is moved backward by the advance / retreat driving means 24a.

First, the welding means 31 is provided with
Is operated, the sandwiching plate 36 is advanced, and the overlapped portion of the sheet piece 9 and the base material 7 is sandwiched between the support means 32 and the sandwiching plate 36. Next, when the welding body 35 is advanced by operating the advance / retreat driving means 40, the welding teeth 39 are inserted through the window holes 34, and the sheet piece 9 and the base material 7 supported by the holding plate 36 from above are superposed. It is pressed against the part. Therefore, the welding line 6 (see FIG. 6) is formed by the welding teeth 39 for firmly welding the sheet material 9 and the base material 7 to each other. When the welding is completed, the sandwiching plate 36 is moved backward by the forward / backward driving means 37, and the welded body 35 is moved backward by the forward / backward driving means 40. Due to the effect of the heated welded body 35, the support means 32
However, since the supporting means 32 is cooled by the cooling means 38, the supporting means 32 is not heated unnecessarily, and there is a possibility that the base material 7 may be welded to the supporting means 32. Absent.

(Embodiment relating to intermittent transfer stroke)
FIG. 4 shows an embodiment relating to the intermittent transfer stroke of the base material 7 and the sheet material 8 in the method of the present invention. FIG.
As shown in (A), the entire intermittent transfer stroke W of the base material 7 by the base material transfer means is expressed as the sum of the primary transfer stroke W1 and the secondary transfer stroke W2. On the other hand, the intermittent transfer stroke of the sheet material 8 is from the stop position where the sheet material 8 is blown by the fusing blade 23 to the end point of the entire intermittent transfer stroke W of the base material 7. The temporary start position P at which the transfer is started by being guided by 22 and the fusion portion 8b is contact-welded to the base material 7 is set at the end point of the first transfer stroke W1 (that is, the start point of the second transfer stroke W2). Have been.

Then, while the base material 7 is being transferred through the entire intermittent transfer stroke W, the sheet material transfer means is arranged such that the molten portion 8b of the sheet material 8 contacts the base material 7 at the temporary fixing start position P. 16 intermittent transfer start timings are set. Therefore, at the moment when the base material 7 reaches the end point of the first transfer stroke W1 (that is, the start point of the second transfer stroke W2), the molten portion 8
b is contact-welded to the base material 7 at the temporary fixing start position P, and then the sheet material 8 and the base material 7 are integrally transferred, and FIG.
As shown in (B), when the fusion portion 8b reaches the end point of the entire intermittent transfer stroke W of the base material 7 (end point of the secondary transfer amount W2), both the sheet material 8 and the base material 7 transfer. After finishing, the operation is stopped, and the above-described fusing by the fusing blade 23 and the fusing by the fusing unit 31 are performed. Thereafter, the same operation is repeated.

As described above, in addition to the configuration in which the molten portion 8b of the sheet material 8 is welded and temporarily fixed during the transfer of the substrate 7, the molten portion 8b of the sheet material 8 is welded while the substrate 7 is temporarily stopped. You may comprise so that it may temporarily fix. In this case, the base material 7 is temporarily stopped when reaching the end point of the primary transfer stroke W1 (that is, the start point of the secondary transfer stroke W2), and the sheet material 8 starts intermittent transfer in this state. Therefore, at the same time when the molten portion 8b of the sheet material 8 is contact-welded to the surface of the base material 7 at the temporary fixing start position P, the base material 7 starts to be transported again, and the base material 7 is integrated with the sheet material 8. 7 is transferred corresponding to the remaining secondary transfer stroke W2.
And the substrate 7 may be stopped.

According to this embodiment, as shown in FIG. 4 (C), when a bag having a predetermined length L is formed from the continuous elongated tube 1 composed of the base material 7, a sheet is formed. The header portion 13 can be suitably formed by the pieces 9.
Note that the width of the sheet piece 9 can be formed in a small piece that does not extend over the entire width of the base material 7 as shown in FIG.
The sheet material 8 having an arbitrary width can be used. Further, by changing the temporary fixing start position P of the sheet material 8 together with the installation positions of the guide means 22 and the fusing blade 23 and changing the intermittent transfer stroke of the sheet material 8, for example, the predetermined length L of the bag body is substantially reduced. The sheet piece 9 may be attached so as to cover the entire length.

[0041]

In the case where the tape-like sheet material is fed from a direction perpendicular to the substrate transfer direction as proposed in the conventional side gusset type bag making method, the side of the tape-like sheet material is moved with respect to the substrate transfer line. On the other hand, since the transfer line for the tape-shaped sheet material is arranged in a protruding state, there is a problem that the apparatus becomes large as a whole and requires an installation space. Since the transfer is performed in the direction, the line can be formed in a substantially straight line, and there is an effect that the device can be reduced in size and space can be saved.

In the case of a conventional structure in which a tape-like sheet material is fed out from a direction orthogonal to the direction of transporting the base material,
From the start of feeding of the tape-shaped sheet material to the end of fusing and welding, it is necessary to intermittently stop the base material, and the stopping time is relatively long, so that the efficiency per time is not good. On the other hand, according to the present invention, since the sheet material is transported in the same direction as the substrate, the intermittent stop time can be shortened, and mass production at high speed is possible.

Further, in the case of the conventional technique of feeding out a tape-like sheet material from a direction perpendicular to the direction of transport of the base material in order to form a header portion in the bag body, the fed-out tape-like sheet material is blown. In addition, not only high precision is required to fit along the side edge of the base material, but also there is a problem that malfunction occurs and the base material itself is blown at the same time. When the tape-like sheet material is blown off slightly outside the side edge, there is a problem that the core material for the header protrudes from the side edge of the bag body after bag making, but according to the present invention,
Since the configuration is such that the sheet material is transferred in the same direction as the base material, such a problem does not occur at all.

By the way, in order to realize the configuration for transferring the sheet material in the same direction as the base material as in the present invention, the base material transfer means is required to enable the simultaneous transfer of the sheet material and the base material. It is necessary to design the sheet material transfer means at the same speed, but usually, during actual operation, the base material and the sheet material are affected by various conditions. Is difficult to maintain. In this regard, according to the present invention, according to the present invention, the molten portion at the front end of the sheet material is temporarily welded to the surface of the base material by contact welding, and the base material and the sheet material are transferred integrally in this temporarily fastened state. Therefore, it is extremely advantageous in that it is only necessary to set the temporary fixing position correctly at a predetermined position, and it is not necessary to consider the subsequent speed difference.

[Brief description of the drawings]

FIG. 1 is a sectional side view showing an embodiment of the device of the present invention.

FIG. 2 shows an embodiment of the method of the present invention, and is a cross-sectional side view showing a state in which transfer of a sheet material has been started and a front end fusion portion has been contact-welded to the surface of a base material.

FIG. 3 shows an embodiment of the method of the present invention, in which the sheet material and the base material are stopped after being integrally transferred, and the sheet material is melted by the fusing blade, and the sheet piece and the base material are welded by welding means. It is sectional side view which shows a state.

4A and 4B show an embodiment relating to an intermittent transfer stroke of a base material and a sheet material in the method of the present invention, and FIG. 4A is an explanatory diagram showing a state before the transfer of the base material and the sheet material is started;
(B) is an explanatory view showing a state in which the transfer of the base material and the sheet material has been completed, and (C) is a plan view showing an application example in which a header portion is provided on a tube as a semi-finished bag.

5A and 5B show an application example of the present invention, in which FIG. 5A is a perspective view showing a process for forming a tube as a semi-finished bag, and FIG. It is a perspective view which shows the process of.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 tube body 7 base material 8 sheet material 8a sheet material tip portion 8b sheet material melting portion 9 sheet piece 10 welding line 16 sheet material transfer device 22 guide means 23 fusing blade 24 holding plate 31 welding means 32 supporting means 33 sandwiching Means 34 Window hole 35 Welding body 38 Cooling means 39 Welding teeth

──────────────────────────────────────────────────の Continued on the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B31B 19/86 B31B 21/86 B31B 23/86 B31B 25/86 B31B 27/86 B31B 29/86 B31B 31 / 86 B31B 33/86 B31B 35/86 B31B 37/86 B31B 39/86 B65B 61/14

Claims (6)

(57) [Claims] 1. A step of intermittently transferring a synthetic resin-made continuous long base material in a longitudinal direction; and a continuous length of synthetic resin made in the same direction as the transfer direction of the base material toward the surface of the base material. A step of intermittently transferring the long sheet material, and starting the intermittent transfer of the sheet material in a state in which a melted portion is formed by fusing at the leading end of the sheet material, and the melted portion is contact-welded to the surface of the base material. A step of transferring the sheet material integrally with the base material in a temporarily fixed state, and then stopping the base material and the sheet material at the same time; Separating the sheet piece temporarily fixed to the material, and firmly welding the sheet piece to the base material. . 2. After forming a fusion zone by fusing at the leading end of the sheet material, intermittent transport of the sheet material is started during intermittent transport of the base material, and the molten portion of the sheet material is placed on the surface of the base material being transported. 2. The method for attaching a sheet piece to a continuous elongate substrate according to claim 1, wherein the sheet piece is contact-welded. 3. After forming a fusion zone by fusing at the leading end of the sheet material, intermittent transfer of the sheet material is started when the substrate is stopped, and the fusion zone of the sheet material is contact-welded to the surface of the stopped substrate. The method for attaching a sheet piece to a continuous elongate substrate according to claim 1, wherein the method comprises: 4. A base material transferring means for intermittently transferring a continuous long base material made of synthetic resin in a longitudinal direction, and a synthetic resin made of synthetic resin in the same direction as the base material is transferred toward the surface of the base material. Sheet material transfer means for intermittently transferring a continuous long sheet material, and fusing means for forming a fusion zone at the tip of the sheet material by fusing the sheet material in the width direction while the sheet material is stopped,
A welding means for firmly welding the sheet material and the base material on the downstream side in the transport direction from the fusing means, wherein the fusing means intersects the front end of the sheet material at an acute angle with the surface of the base material. And a fusing blade for fusing the sheet material in the width direction in the vicinity of the leading end of the guiding means, wherein the sheet material transferring means starts the intermittent transfer of the sheet material, and then starts the leading end of the sheet material. An apparatus for sticking a sheet piece to a continuous elongate substrate, wherein the device is controlled to stop at the same time as the substrate transfer means when the portion is positioned facing the welding means. 5. A sheet material located on the guide means,
A holding plate is provided between the cutting blade and the fusing blade that is moved forward and backward with respect to the sheet material, and the cutting edge of the fusing blade is positioned downstream of the holding plate in the sheet material transfer direction so as to face the sheet material. The holding plate is arranged so as to be closer to the sheet material than the cutting edge of the fusing blade, and is elastically supported by the fusing blade so as to retreat via a spring. 5. The continuous long base according to claim 4, wherein when advanced toward the material, the cutting edge of the fusing blade comes into contact with the sheet material after the holding plate contacts the sheet material. A device for attaching sheet pieces to materials. 6. The welding means is provided on a supporting means for supporting the base material, a holding means for moving forward and backward so as to hold the overlapped portion of the base material and the sheet material between the supporting means, and the supporting means. And a welded body which is moved forward and backward so as to be pressed against the overlapped portion of the sheet material through the provided window hole, and wherein the support means is provided with a cooling means. Item 5. A device for attaching a sheet piece to a continuous long base material according to Item 4.