JPH0624422A - Center seal of web and web feeding device - Google Patents

Abstract

PURPOSE:To provide a center seal device of which respective center seal means can be automatically centered at the center seal positions, and the positioning of which can be easily performed, in addition, for which the replacement, adjustment and maintenance works can be easily and conveniently performed even when the pipe is replaced by a pipe with different diameter, and also, the overall size of which can be made smaller, and the installation space of which can be made smaller. CONSTITUTION:In a center seal device 8, a pair of center seal means 8a move to be opened/closed by respective supporting blocks 14, and relatively approach or separate from the center seal position to perform a centering. Also, the pair of center seal means 8a move in the diametral direction of a cylinder by respective supporting blocks 14, and perform as positioning to the center seal position. In addition, a feeding means 7a of a web feeding device 7 is linked with the center seal device 8 by respective supporting blocks 14 and an extension means 8b, and relatively approach or separate from a cylindrical web, and thus, center and interval adjustment are performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a center seal for a cylindrical web that is formed into a cylindrical shape and sends it out, and a web feeding device.

[0002]

2. Description of the Related Art A conventional bag-filling and packaging machine will be described with reference to a vertical pillow packaging machine shown in FIGS. 3 and 4. In this vertical pillow packaging machine, a former (bag-making machine) is provided above a filling pipe 1 which is vertically installed. 2 is disposed, and the web 5 is fed by the pair of feeding rollers 4 and 4 disposed between the former 2 and the original roll 3 rotatably supported.
Thus, after forming the cylindrical bag body 6, it is intermittently transferred downward along the surface of the filling pipe 1 by a predetermined length. This intermittent transfer is performed by a pair of bag body feeding means (endless belts or the like) 7 arranged so as to face each other with the tubular bag body 6 interposed therebetween.

Next, the center seal means 8 vertically seals both side edge overlapping portions of the tubular bag body 6 in the axial direction (vertical direction), and the article W to be packaged is inserted into the tubular bag body 6 through the filling pipe 1. Supply to fall. Then, intermittent transfer and stop of the tubular bag body 6 are repeated, and finally, the end seal means 9 performs lateral sealing and cutting to obtain a final packaged product in which the packaging target article W is completely filled. ing.

[0004]

In the conventional vertical pillow packaging machine shown in FIGS. 3 and 4, the diameter of the tubular bag body 6 formed by the former 2 is changed according to the dimensional change of the article W to be packaged. Need to change. In this case, the filling pipe 1 will be replaced with one having a different diameter. At this time, the interval between the pair of bag body feeding means (endless belts or the like) 7 for feeding the tubular bag body 6 while sandwiching the tubular bag body 6 according to the change of the diameter of the filling pipe 1 is adjusted, and the tubular bag body 6 is It is necessary to adjust the position and the like of the center seal means 8 for vertically sealing the overlapping portions on both side edges in the axial direction.

However, as shown in FIG. 4, the bag feeding means 7, 7 and their driving / adjusting means, the center seal means 8 and their driving / adjusting means are independent of each other. When exchanging with a different diameter, the supporting frame 8 of the center seal means 8 is opened to the position of the alternate long and two short dashes line about the shaft 12 each time, and then the pair of bag feeding means 7, 7 is moved. Then, the filling pipe 1 is taken out, then a new filling pipe 1 is attached, and then the bag feeding means 7, 7 and the center sealing means 8 are adjusted by the respective adjusting means to perform centering, positioning and interval adjustment with respect to the center of the filling pipe 1. Therefore, the work for replacing the filling pipe 1 is troublesome and requires a lot of time. There is also a problem that the structure of the device is complicated and a large installation space is required.

The present invention has been proposed in view of the above problems, and an object thereof is to automatically center each center seal means of a center seal device to a center seal position and to easily position it. it can. Further, even when the filling pipe is replaced with one having a different diameter, the replacement, adjustment, and maintenance work can be performed easily and conveniently. Another object of the present invention is to provide a web center seal and a web feeding device which can reduce the size of the entire device and also reduce the installation space.

[0007]

In order to achieve the above-mentioned object, the present invention provides a cylindrical web, which is unrolled from a roll and formed into a cylindrical shape, after center-sealing the axially overlapping side edges of the cylindrical web. In a center seal of a web and a web delivery device for pushing out a web-like web in a radial direction by a web delivery means, a pair of center seal means having an expansion / contraction means for pressing and sealing both side edge overlapping portions in the axial direction of the cylindrical web. , A pair of support blocks for supporting the respective center seal means so as to be movable in the radial direction of the cylindrical web, and by operating either or both of the expansion and contraction means and the support block, It is configured to open and close.

According to the present invention, in the above-described web center seal and web delivery device, the support block supports the center seal means so as to be movable in the diameter direction of the cylinder corresponding to the size of the cylinder of the web. Further, according to the present invention, in the web center seal and the web delivery device, the web delivery means is attached to the support block through the expansion / contraction means, and the extension / contraction means and the support block are operated to form the web delivery means into a cylindrical web. It is configured to be brought into contact with and separated from each other.

[0009]

The web center seal and the web feeding device of the present invention are configured as described above, and in the center seal device, a pair of center seal means are opened and closed via the support block to move relative to the center seal position. Center relative to each other. Further, the pair of center seal means move in the diametrical direction of the cylinder through the support block to perform positioning with respect to the center seal position. Further, the feeding means of the web feeding device is interlocked with the center seal device via the support block and the expanding / contracting means, and relatively approaches or separates from the cylindrical web to perform centering and space adjustment.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The web center seal and web feeding device of the present invention will now be described with reference to one embodiment shown in FIGS. 1 and 2. 8 is a pair of center seal devices, 18 is a rail,
A pair of support blocks 14 and 14 are attached to the rail 18 via a slide bearing 17 so as to be movable in the left-right direction, and 8, 8d and 8d are attached to the respective support blocks 14 in the front-rear direction via slide bearings 8e. A pair of sliders 8b, 8b mounted so as to be movable
A pair of expandable cylinders (e.g., air cylinders) 8a, 8a attached to d, and a pair of center seal parts 8a supported by the expandable cylinders 8b so as to be movable in the left-right direction.
Reference numerals c and 8c denote threaded rods rotatably attached to the support blocks 14, and threaded portions of the threaded rods 8c are screwed into the sliders 8d.

Reference numeral 15 denotes a drive shaft parallel to the rail 18 and 1
6 and 16 are bevel gears attached to the drive shaft 15 and the rod 8c and meshed with each other. The rotation of the drive shaft 15 is transmitted to each threaded rod 8c through the bevel gears 16 and 16, and each threaded rod 8c is rotated. , The sliders 8d, the seal cylinders 8b, and the center seal portions 8a are moved in the front-rear direction (diameter direction of the cylinder). Further, each seal cylinder 8b is operated in the expansion / contraction direction to move each center seal portion 8
It is arranged that a is brought into contact with and separated from both side edge overlapping portions in the axial direction of the cylindrical web 5 wound around the filling pipe 1.

Reference numeral 7 denotes a web feeding device for the cylindrical web 5, and 7
a and 7a are a pair of delivery parts that are installed opposite to each other with the filling pipe 1 sandwiched between them, 7b and 7b are support parts that support the respective delivery parts 7a, and a pair of pressing parts 7c and 7c are attached to the support blocks 14. In the cylinder, the pressing cylinders 7c rotatably support the support portions 7b and the delivery portions 7a. Denoted at 7d and 7d are delivery driving devices for rotating the support portions 7b and the delivery portions 7a.

Next, the operation of the web center seal and the web delivery device shown in FIGS. 1 and 2 will be described in detail. During normal bag-making filling and packaging, each pressing cylinder 7c is operated in the extending direction to The supporting portion 7b and each feeding portion 7a are moved in the left-right direction so as to approach each other, and the web 5 wound around the filling pipe 1 and formed into a cylindrical shape is pinched with a predetermined pressure from both sides thereof.

Further, each delivery driving device 7d is driven to intermittently rotate each delivery portion 7a to intermittently transfer the cylindrical web 5 downward. Next, the seal cylinders 8b are operated in the extension direction, and the center seal portions 8a press the axially overlapping side edge overlapping portions of the cylindrical web 5 to perform vertical sealing (see FIG. 3). Further, when the diameter of the bag body 6 (see FIG. 3) is changed and the filling pipe 1 is replaced with one having a different diameter, first, the pressing cylinders 7c are operated in the contracting direction, and the pair of delivery portions 7a are operated. Is separated from the filling pipe 1.
Further, each seal cylinder 8b is operated in the contracting direction to separate each center seal portion 8a, and further, if necessary, each support block 14 is moved to the opposite direction by moving means (not shown), and then the filling is performed. Replace pipe 1.

In this case, it is assumed that the moving means is capable of moving the pair of support blocks 14 outwards in opposite directions (for example, the left and right support blocks 14 are formed with reverse screws, and the drive shaft is provided with reverse screw portions. To the left and right support blocks 1
4), so that the centering action on the center of the filling pipe 1 is performed automatically.

When the new filling pipe 1 is installed at a predetermined position, the rod 8c is driven, the seal cylinder 8b is moved in the front-rear direction according to the diameter of the filling pipe 1, and the center seal portion 8a is moved. Are adjusted so as to come to the overlapping portions on both side edges of the cylindrical plug 5 in the axial direction.
Then, the moving means (not shown) is driven to move the left and right support blocks 14 in the left and right directions approaching a predetermined position, and the pressing cylinders 7 attached to the respective support blocks 14 are moved.
By interlocking the c and the seal cylinder 8b, the sending part 7a and the center seal part 8a connected to them are automatically centered around the filling pipe 1.

By the above operation, the left and right sending parts 7a,
After the centering and adjustment of the spacing between the 7a and the centering and positioning of the left and right center seal portions 8a are completed, the web 5 is subjected to a normal bag-making filling and packaging operation to complete the packaged product.

[0018]

According to the web center seal and the web delivery device of the present invention, the center seal device and the web delivery device are mounted so as to be relatively movable on the pair of support blocks which relatively move as described above. Each center seal means of the center seal device is automatically centered at the center seal position and can be easily positioned. Further, since the pair of feeding means of the web feeding device are automatically centered and the distance between them is adjusted arbitrarily, even if the filling pipe is replaced with one having a different diameter, replacement, adjustment and maintenance are required. Work is easy and convenient. Also, because the structure is integrated,
There are advantages that the entire device is downsized and that the installation space is small.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a web center seal and a web feeding device of the present invention.

FIG. 2 is a plan view of a center seal of the web and a web delivery device.

FIG. 3 is a perspective view showing a conventional vertical pillow packaging machine.

FIG. 4 is a plan view of the vertical pillow packaging machine.

[Explanation of symbols]

 1 Filling pipe 5 Web 6 Cylindrical bag 7 Web delivery device 7a Delivery part 7b Support part 7c Pressing cylinder 8 Center seal device 8a Center seal part 8b Seal cylinder 8c Rod 8d Slider 8e Slide bearing 14 Support block 15 Drive shaft 16 Bevel gear 17 Slide bearing 18 Rail

Claims (3)

[Claims] 1. A center seal of a web which is fed from a roll and is centrally sealed at both side edge overlapping portions in the axial direction of a cylindrical web, and then the cylindrical web is pushed by a web feeding means in a radial direction and fed. In the web feeding device, a pair of center seal means having expansion and contraction means for pressing and sealing both side edge overlapping portions of the cylindrical web in the axial direction, and the respective center seal means are movable in the radial direction of the cylindrical web. A center seal and a web for a web, comprising a pair of support blocks for supporting, and activating or contracting one or both of the expansion and contraction means and the support block to open and close each of the center seal means. Sending device. 2. The center seal for a web according to claim 1, wherein the center block means is supported by the support block so as to be movable in a diameter direction of the cylinder corresponding to a size of the cylinder of the web. Web sending device. 3. The web feeding means is attached to the support block via the expanding / contracting means, and the expanding / contracting means and the support block are operated to bring the web discharging means into contact with and separate from the cylindrical web. The web center seal and the web delivery device according to claim 1.