JP3593063B2 - Reticulated gusset bag manufacturing equipment - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an apparatus for manufacturing a mesh-like resin bag having a gusset shape.
[0002]
[Prior art]
A continuous mesh bag made of polyethylene resin and having cuts in the vertical, horizontal, and diagonal directions has a shape of a raw material that is firstly completed due to its manufacturing method, as shown in FIG. It has a cylindrical shape with an opening. In order to finally produce a bag in a used state, the cylindrical raw material W is heat-fused for each length corresponding to a desired bag size (depth), and the bag is closed. Cut the bag at the closed position to complete the unit.
[0003]
As shown in FIG. 12B, a gusset-type bag having both sides folded inward as shown in FIG. 12B is a web W formed in a tubular shape as shown in FIG. Into a flat shape in accordance with the diametrical direction, and the widthwise opposing sides of the flat surface are folded inward to form a gusset shape G. Thereafter, in the same manner as described above, fusion is performed at predetermined lengths in the longitudinal direction. to conduct a closed bag, it is intended to obtain the finished product W ₀ of the unit is cut at the position of the bag closed.
[0004]
[Problems to be solved by the invention]
All of the above work is currently performed manually, but it is very laborious and troublesome, and there are variations in the quality of work due to manual work, and above all, mass production is not possible, which is a factor of high cost. ing.
[0005]
Therefore, an object of the present invention is to make it possible to efficiently manufacture a mesh gusset bag made of such a resin without variation.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the present invention has a drive mechanism for moving the web of the mesh cylindrical resin in the axial direction thereof, and a drive mechanism for moving the web of resin on a base provided in the middle of the movement path of the web. The pair of molded bodies are disposed to face each other in a direction intersecting the movement path, and prevent the core covered with the raw material from moving in the moving direction of the raw material and in the direction intersecting the core. By means of a device provided with positioning means for positioning between the pair of molded bodies in the form, a resin mesh gusset bag was automatically manufactured, and irrespective of the device, A state in which the web of the mesh cylindrical resin is moved (manually) in the axial direction thereof, and in the middle of the movement, the web is covered with a core and a pair of molded bodies having the above-described shape relationship. Is placed between the pair of compacts, and the material Is moved, than was to produce a net-like gusset bag of the resin is by passing the pair formed body and the core disposed therebetween.
[0007]
Because of this, the mesh bag automatically and semi-automatically given the gusset shape from the mesh cylindrical raw material W shown in FIG. Can be manufactured well.
[0008]
In the above configuration, the interval between the pair of compacts and the core W between the material webs can be made variable, so that the amount of folding of the gusset G (indicated by the symbol d in FIG. 12B). ) Can be adjusted quickly.
[0009]
Further, if the formed body is a rotating disk having a plate surface oriented in parallel with the moving direction of the raw material, a gusset shape is provided, and the rotation of the disk, that is, the formed body and the raw material Since the friction between the lines in the flow direction is reduced, the pulling force applied to the web is reduced, the flow becomes smooth, and the risk of damage such as tearing of the web is reduced.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention, that is, an apparatus for manufacturing a mesh gusset bag will be described with reference to the drawings. FIG. 1 schematically shows the entire configuration of the apparatus.
[0011]
In this apparatus shown in FIG. 1, a supply reel 20 wound with a web W formed in a mesh cylindrical shape using a polyethylene resin as shown in FIG. The labeling device 30 is disposed at the most upstream side of the base 1 of the line, and the gusset forming mechanism 10 is disposed immediately below the labeling device 30. Immediately downstream of the gusset forming mechanism 10, a pulling roller 6 that pulls out the web W from the supply reel 20 is disposed.
[0012]
Further, downstream of the pulling roller 6, there is provided a cutting mechanism 40 for cutting the raw material W, which has been given the gusset shape by the gusset forming mechanism 10 and flows, at a predetermined position in the axial direction (line flow direction). Adjacent to the downstream side is a fusing mechanism 50 for fusing the cutting position to close the bag. After the fusing mechanism 50, a simple conveyor 60 for discharging is provided. The conveyor 60 is provided with a pair of heaters 70 disposed inside and above the conveyor belt to face each other. Pressing the gusset part while heating weakly with, the shape is completely fixed. Such finished product W ₀ which is prepared, and is discharged to the tray 80 by the conveyor 60. In this embodiment, the mesh-shaped cylindrical web W flows through the production line having the above-described configuration, and receives a gusset forming action on the way to produce a mesh gusset bag. Next, the gusset forming mechanism 10 for providing the gusset shape will be described with reference to FIGS. FIG. 2 shows the configuration of the gusset forming mechanism 10.
[0013]
As shown in FIG. 2, the gusset forming mechanism 10 is disposed on the upper surface of the base 1, and the upper right of the base 1 in the drawing corresponds to the upstream side of the line. Near the upstream end, there is provided a rectangular area 1a that is one step lower than the surface of the base 1, and each of the opposing surfaces intersecting the flow direction of the line of the lowered part has a line. A plurality (three) of support rollers 2 rotating in the flow direction are arranged in parallel. The support roller 2 supports a core 11 on which a core 11 described later is placed.
[0014]
In addition, large and small holding rollers 3 rotating around a vertical axis are opposed to each other on opposite sides of the rectangular area 1a that intersect with the flow direction of the line. The roller 3 restrains a core 11 described later placed on the support roller 2 in the width direction of the line. The nipping roller 3 and the supporting roller 2 support the core 11 as described above, and position the core 11 in the width direction of the line. As described later, the core 11 and the rollers 2, 3 The rotation of the web W is also brought into contact with the web W sandwiched therebetween, so that the web W can flow smoothly. In particular, among a group of rollers (3) standing upright on the surface of the base 1, a belt 3b to be driven by a drive mechanism (not shown) is wound around a large roller 3a on the front side in the figure. The rollers 3a are driven by belt conduction to forcibly move the web W so that the flow is further smoothed.
[0015]
On the downstream side of the rollers (2, 3), first, a molded body 4 supported by a bracket 1b provided on the side surface of the base 1 is provided symmetrically with respect to the center axis of the line flow. I have. The molded body 4 has a simple shape formed by bending a steel material into a U-shape. A male screw 4b is formed at one end of the U-shape, and the male screw 4b is screwed to the bracket 1b at the portion of the male screw 4b. Then, it protrudes horizontally in the direction intersecting the flow of the line, and in the middle thereof, inclines (inclined portion 4a) in the horizontal plane toward the downstream side of the line to reach the other end of the square.
[0016]
One positioning roller 5 is provided on the downstream side of the molded body 4, and a pair of upper and lower pulling rollers 6 are provided on the downstream side thereof so as to intersect with the flow direction of the line. The raw material W wound around the supply reel 20 is drawn out by the pulling roller 6 and sent to the downstream side along the line. The roller 6 is driven by a drive mechanism partially showing only the sprocket 6s and the transmission chain 6c. The gusset shape given to the web W is pressed and fixed by the pulling roller 6. The upstream positioning roller 5 is used for positioning the core 11 in the flow direction of the line described below.
[0017]
This apparatus includes a base 1 on which the above-described formed body 4 and the roller group (2, 3, 5, 6) are disposed, and another base material W in cooperation with the formed body 4. It has a core 11 forming a gusset shape. As shown in FIG. 2, the core 11 is a vertically-symmetrical gate-shaped steel material 13 (hereinafter simply referred to as a gate-shaped 13) from a front surface of a rectangular base 12 having a predetermined thickness on a front side in the drawing. ) Are formed to project obliquely in a direction toward the middle of the thickness of the base 12 to form upper and lower inclined surfaces 13p. Rollers are connected to the front edges of both inclined surfaces 13p by connecting them. 14 is mounted.
[0018]
Also, from the back surface of the surface on which the gate mold 13 protrudes, a steel material 15 is protruded to form a vertically symmetric inclined surface 15p, and the inclined surface 15p is, as described later, the raw material W Serves as a guide surface when the core 11 is passed through. The upper and lower inclined surfaces 13p formed by the upper and lower gate molds 13 on the front surface of the base also serve as guide surfaces when the material web W passes. The core 11 as described above is set on the base 1 with the material W covered thereon, as described below. When the core 11 is set alone, it has the shape shown in FIG. Next, a procedure for manufacturing a mesh gusset bag by the above-described apparatus will be described.
[0019]
First, as shown in FIG. 2, the core 11 is detached from the base 1, and the core 11 is pulled out from the supply reel 20 as shown in FIG. The web W is put on the inclined surface (guide surface) 15 p on the back side of the base 12. The web W is further advanced after passing through the inclined surfaces 13p of the upper and lower gate molds 13 on the front side of the core 11 to hold the core 11 covered with the web W as shown below. When the original web W is placed in the area of the roller group for use (3) and support (2), the leading end of the web W comes to a position beyond the pulling roller 6 on the near side of the base 1.
[0020]
In this manner, first, after the core 11 is covered with the web W, as shown in FIGS. 4B, 5, and 6, the core 11 in the state is held between the holding member 3 and the supporting member 3. It is set in the area of the roller group of (2). The core 11 is ultimately placed with its base 12 in the area of the roller group for holding (3) and supporting (2). 3 and immediately above, the upper and lower portal molds 13 protruding from the front side of the base 12 interfere with the molded body 4. The portion of the gate 13 is placed on the area of the rollers (2, 3) while being pulled rearward (upstream) from the position where the roller 14 is moved. Contact the positioning roller 5. While the roller 14 is in contact with the positioning roller 5, a generating line passing through both ends of one diameter of the cylinder of the raw web W is pressed by the inclined portion 4 a of the molded body 4 in the space between the upper and lower gate molds 13. Come in. Thus, both sides of the web W are folded inward.
[0021]
As shown in FIG. 6, the portion of the web W that has passed the rollers 14 at the gate-shaped end is sunk under the positioning rollers 5 and then passes between the upper and lower pulling rollers 6. Let it. Thus, the setting of the core 11 and the web W on the base 1 is completed.
[0022]
Thereafter, when the apparatus is operated by driving the pulling roller 6, the web W is drawn out from the supply reel 20, and as it moves on the base 1, as shown in FIG. After passing through the base 12 of the core 11, as shown in FIG. 7 (b), both sides of the material web W are folded inward by the cooperation of the core 11 and the molded body 4, so that the gusset shape G is formed. As shown in FIG. 7 (c), the upper and lower pulling rollers 6 are sandwiched and fixed between them. When the material W is fed, the core 11 always receives a force in the direction of flow due to friction with the material W, but the roller 14 at the portal end protruding from the front surface of the base 12 is used as a positioning roller. 5, so that it is positioned at a fixed position.
[0023]
Simultaneously with the application of the gusset shape G, a label is attached to the raw material W by the label attaching device 30 immediately above the gusset forming mechanism 10, as shown in FIG. This label sticking device 30 is not an essential element of the present invention and is unnecessary when there is no need to stick a label on the gusset bag. In short, the pressing plate 31 is provided at the lower end of the lifting mechanism. As shown in the figure, the band of the label L on which the adhesive is applied, which is supplied from the outside of the line to the position of the upper surface of the base 12 of the core 11, is pressed by the pressing plate 31 on the upper surface of the base 12. The label L is attached to each unit bag by pressing against the surface of the raw material W.
[0024]
After passing through the gusset forming mechanism 10, the web W passes through the pulling roller 6, and after the gusset shape G is fixed, is cut to a predetermined length by the cutting mechanism 40. The bag is closed by fusing every other, and the portion of the simple conveyor 60 further downstream thereof is pressed simultaneously with the heating by a pair of heaters 70 provided inside and above the conveyor 60, and the pulling roller 6 is pressed. The gusset shape G fixed at the time of passing is further firmly fixed, and a unit product is completed. Completed W ₀ is recovered dropped on tray 80 by the simple conveyor 60.
[0025]
(Second embodiment)
The device of the second embodiment is obtained by partially changing only the gusset forming mechanism 10 of the first embodiment. The modified gusset forming mechanism 10 'is shown in FIGS. FIG. 9 shows a configuration of the gusset forming mechanism 10 ', and FIG. 10 shows a state in which the core 11 is set. FIG. 11 is a plan view showing a state where the material web W is set.
[0026]
As shown in the figure, the gusset forming mechanism 10 ′ is different from the first embodiment mainly in the molded body 4 ′. The core 11 has basically the same form as that of the first embodiment. In addition, rollers 12a are provided on both sides of the base 12 so as to cooperate with the vertical roller 3 for clamping. In this way, the friction between the web W and the web W passing between them is reduced, so that the flow of the web W becomes smoother.
[0027]
On the other hand, the molded body 4 ', which is a feature of this embodiment, is a rotating disk made of resin, with the plate surface oriented horizontally, and the vertical rotation axis 4's of which is the groove 4' of the support block 4'b. a is slidably held in a direction intersecting the flow of the line.
[0028]
Further, a guide member 4'g is disposed adjacent to the downstream side of the rotating disk 4 '. The guide member 4′g is a resin plate body, the outer shape of which is an arc along a part of the circumference of the rotating disk 4 ′, a tangential side of the rotating disk 4 ′ continuous with the arc, It is composed of four sides, a side in a direction intersecting the line and a side parallel to the line. The plate surface is horizontal, and the shaft 4 ′ is attached to a bracket 1b ′ provided on the side surface of the base 1. Attached via p. The shaft 4'p is simply stopped by being pressed by the screw 4'b in the bracket 1b '. If the shaft 4'p is loosened, the shaft 4'p can slide in the direction intersecting the line flow. Can be adjusted in that direction. The guide member 4′g is for guiding the gusset shape G formed by the front molded body 4 ′ and the portal die 13 of the core 11 so that the gusset shape G is sent to the roller 5 side in a stable state.
[0029]
The molded body 4 'of this embodiment, like the molded body 4 of the first embodiment, not only sandwiches the web W but also rotates itself, so that friction with the web W is reduced, and Counter feeding becomes smoother. The operation of forming the gusset shape G on the web W of the mesh to complete the bag is the same as that of the first embodiment, and thus the description thereof will not be repeated.
[0030]
However, since the molded body 4 'and the guide member 4'g can be adjusted in position in a direction intersecting with the flow of the line by the above-described configuration, the reference numeral shown in FIG. The adjustment of the folding amount of the gusset G shown by d can be performed quickly.
[0031]
【The invention's effect】
As described above, since the present invention is configured as described above, the gusset-type mesh bag can be easily and efficiently manufactured without variation.
[Brief description of the drawings]
FIG. 1 schematically shows the entire configuration of an apparatus according to an embodiment.
FIG. 2 is an exploded perspective view of a main part of the device of the embodiment.
FIG. 3 is a completed perspective view of a main part of the device of the embodiment.
FIG. 4 is a perspective view showing a procedure for mounting a work in the order of (a) and (b).
FIG. 5 is a plan view showing a state where a work is set.
FIG. 6 is a side view showing a state where a work is set and the work is flowing on a line.
7 (a), (b) and (c) show the folded state of the material at each position as viewed from arrows AA, BB and CC in FIG. 6, respectively. It is.
FIG. 8 is a completed perspective view of the device provided with the label sticking device.
FIG. 9 is an exploded perspective view of the device of the second embodiment.
FIG. 10 is a completed perspective view of the device of the second embodiment.
FIG. 11 is a plan view showing a state in which a work is set in the apparatus according to the second embodiment.
FIGS. 12 (a) and 12 (b) respectively show a raw material and a finished product in perspective views.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 base 2 support roller 3 pinching roller 4, 4 ′ molded body 5 positioning roller 6 pulling roller 10 gusset forming mechanism 11 core 12 base 13 portal mold 14 roller 20 supply reel 30 label sticking device 40 cutting mechanism 50 melting Attachment mechanism 60 Simple conveyor 70 Heater 80 Tray W

Claims (1)

It has a drive mechanism for moving the web W of the mesh cylindrical resin in its axial direction, and a pair of molded bodies 4, 4 is mounted on a base 1 provided in the middle of the movement path of the web W. wherein together are oppositely disposed in a direction crossing the movement path, the original core 11 in a state of covering the anti-W is located between the molded body 4, 4 of the pair, the molded body 4 of the pair, Positioning means 4 is provided on the base 1 to prevent the core 4 from entering the core 11 from the side surface thereof and to prevent the core 11 from moving in a direction intersecting with the direction of movement of the material web W. The raw material W is moved in the axial direction by the drive mechanism and passes through the outer periphery of the core 11, so that the core 11 and the molded body 4 cooperate with each other to form both side surfaces of the raw material W. Is folded inward to form a gusset shape,
The base 1 is provided with a pinching roller 3 having a vertical rotation axis and abutting on both sides of the core 11 with a web W interposed therebetween, and the raw web W is provided between the holding roller 3 and the core. by passing between the 11 side surface, the raw counter-W side flat surface is formed, the manufacture of reticulated moth peptidase Tsu preparative bag features a shaped body 4 that against cracking on the flat surface apparatus.

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