JP2023082258A - Positional-deviation preventer and packaging machine - Google Patents

Abstract

To provide a positional-deviation preventer allowed to enhance the prevention effect in positional deviation of stacked articles being carried, irrespectively of external air humidity, and a packaging machine comprising the same.SOLUTION: A positional-deviation preventer 100 comprises electrifying means 101, cover means 102, and low-humidity gas supply means 103, so as to electrify stacked articles XA2 passing below the cover means 102 while ejecting low-humidity gas into the cover means 102.SELECTED DRAWING: Figure 3

Description

TECHNICAL FIELD The present invention relates to a misregistration prevention device and a packaging machine having the same.

2. Description of the Related Art Conventionally, there is known a horizontal form-fill-seal machine that charges aggregates to be conveyed with static electricity to prevent displacement of the aggregates (see, for example, Patent Document 1). In the horizontal bag-making and filling machine described in Patent Document 1, static electricity is directly charged to accumulated products immediately before being sent to a tubular film by the supply conveyor above the conveying path of the supply conveyor on the upstream side of the bag-making means. Static electricity generating means for generating static electricity is provided.

Japanese Patent No. 6121815

However, in the conventional misalignment prevention device that electrifies stacked products being conveyed by static electricity generating means arranged above the supply conveyor, when the humidity of the outside air is high, the stacked products are coated with water molecules. Therefore, since the discharge is gradually discharged, it becomes difficult to charge (it is difficult to maintain the charge), and there is a problem that the positional deviation prevention effect is lowered.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a misalignment prevention device capable of enhancing the misalignment prevention effect of conveyed articles regardless of the humidity of the outside air, and a packaging machine equipped with the same. intended to

The present invention comprises charging means, cover means, and low-humidity gas supply means, and the article to be packaged passes under the cover means while ejecting the low-humidity gas into the inside of the cover means. It relates to a misalignment prevention device characterized by charging the .

The present invention also relates to a packaging machine equipped with the positional deviation prevention device described above.

ADVANTAGE OF THE INVENTION According to this invention, the positional deviation prevention apparatus which can improve the positional deviation prevention effect of the conveyed articles|goods, and a packaging machine provided with the same can be provided irrespective of the humidity of outside air.

1 is a schematic front view showing the overall configuration of a packaging machine according to the present invention; FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the package (secondary package) which concerns on this invention, (A) is a front view, (B) is a top view. BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic which extracts and shows the vicinity of the misalignment prevention apparatus which concerns on this invention, (A) Front view, (B) Plan (top) view, (C) Side view, (D) Front view. BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic which extracts and shows the vicinity of the positional deviation prevention apparatus based on this invention, (A) Front view, (B) plane (upper surface) view, (C) Side view. It is a schematic diagram which shows the modification of the positional deviation prevention apparatus which concerns on this invention. It is a schematic diagram which shows the modification of the packaging machine which concerns on this invention, and is (A) Front view, (B) It is a top view.

Hereinafter, with reference to drawings, a misalignment prevention device 100 according to the present invention and a packaging machine 1 having the same will be described in detail. FIG. 1 is a schematic front view of a packaging machine 1 equipped with a misalignment prevention device 100. As shown in FIG. 2A and 2B are diagrams showing the appearance of the package ZA2 packaged by the packaging machine 1. FIG. 2A is a front view corresponding to FIG. 1, and FIG. 2B is a top (plan) view. In addition, in this figure and each subsequent figure, a part of the configuration is appropriately omitted to simplify the drawing. In addition, in this drawing and subsequent drawings, the size, shape, thickness, position, etc. of the members are appropriately exaggerated.

As an example, the packaging machine 1 shown in FIG. 1 continuously supplies the packaging material YA2 in accordance with the sequential supply of the items XA2 to be packaged, and forms a cylindrical bag at a predetermined pitch (cut pitch CP). It is a so-called horizontal form-fill-seal machine (pillow packaging machine) in which sealing and cutting are performed in the width direction of the packaging material YA2 every time.

The packaging machine 1 uses the packaging material YA2 that is continuously supplied to package the products to be packaged XA2 that are sequentially supplied from the previous process while conveying them from upstream to downstream. The packaging material YA2 in this embodiment is, for example, a resin film, but is not limited to this, and may be a paper material or the like. In FIG. 1, the side closer to the original fabric roll YB1 is upstream, and the farther side is downstream.

<Packaging machine>
Referring to FIG. 1, a packaging machine 1 includes an article supply device 2, a packaging material supply device 3, a packaging machine body 4, a misalignment prevention device 100, a control unit (not shown), and the like. It conveys and packs the goods XA2. In this embodiment, as definitions of various directions in the packaging machine 1, the first direction that is the longitudinal direction of the strip-shaped packaging material YA2 is the conveying direction T, and the second direction that is the width direction of the packaging material YA2 orthogonal to the longitudinal direction. The third direction perpendicular to the transport direction T and the transport width direction W is the transport height direction H.

Each part of the packaging machine 1 is centrally controlled by a control unit. The control unit is composed of a CPU, RAM, ROM, etc., and executes various controls. The CPU is a so-called central processing unit, and executes various programs to realize various functions. RAM is used as a work area for the CPU. The ROM stores the basic OS and programs executed by the CPU.

Referring to FIG. 2, the article to be packaged XA2 of the present embodiment is, for example, a stack of individually packaged articles XA1 (primary packages). The packaging material YA1 of the primary packaging body ZA1 is made of a material that can be charged with static electricity. For example, it is a resin film such as CPP (unstretched polypropylene), but not limited to this, and is coated with a resin material that can be charged with static electricity. It may be a paper material or the like that has been applied. In this example, the articles XA1 (primary packages ZA1) housed in the packaging material YA1 are stacked in multiple stages (eg, three stages) in the transport height direction H, and further multiple rows (eg, four to four layers) in the transport direction T are stacked. 5th line) are packaged together to form one package (secondary package ZA2). That is, the to-be-packaged item XA2 of the present embodiment is a stack of primary packages ZA1 arranged in a plurality of columns and a plurality of rows.

Referring to FIG. 1 again, the article supply device 2 conveys a group (for example, 3 rows×5 rows) of packaged articles (hereafter referred to as accumulated articles) XA2 at regular intervals, and moves the accumulated articles XA2 downstream. The sheets are sequentially conveyed to the packaging machine main body 4 . The article supply device 2 includes, for example, a conveying surface 25, pushing means (for example, fingers) 22 for sandwiching the accumulated article XA2 from the front and rear in the conveying direction T and pushing the accumulated article XA2 in the conveying direction T, and lateral movement of the accumulated article XA2. It is a finger conveyor with covering guide means 206 . The finger conveyor 2 has, for example, a plurality of sprockets 201 (driving sprockets, driven sprockets), some of which are not shown here, and an annular chain (or belt) 202 that runs around these. The drive sprocket is driven by a servomotor to rotate, thereby causing the chain 202 to run in a circulating manner. The driven sprocket rotates in conjunction with the driving sprocket as the chain 202 runs. The plurality of fingers 22 protrude upward from below the conveying surface 25 through slits (not shown here) provided in the conveying surface 25 . The plurality of fingers 22 travel on the conveying surface as the chain 202 travels, and pushes the stack XA2, which is a bundle of the plurality of primary packages ZA1 on the conveying surface 25, to the packaging machine main body 4.

The packaging material supply device 3 continuously supplies the packaging material YA2 to the downstream packaging machine body 4 . The packaging material supply device 3 includes a web shaft 8, a servo motor (not shown), rollers 9, and the like. The original fabric shaft 8 rotatably holds the original fabric roll YB1. The raw fabric shaft 8 is rotated by being powered by a servomotor to rotate the held raw fabric roll YB1. As a result, the strip-shaped packaging material YA2 is fed (stretched) from the raw fabric roll YB1. The roller 9 guides the wrapped packaging material YA2 to the supply port 14a of the bag making machine 14 provided downstream.

As a method for feeding the packaging material YA2 from the original fabric roll YB1, instead of adopting the above-described method of driving the original fabric, a separate feed roller is provided, and the feed roller is moved to pull out the packaging material YA2. A driven method may be employed. Also, both the original fabric drive method and the feed roller drive method may be adopted.

The packaging machine main body 4 packages the stacked products XA2 supplied from the article supply device 2 while forming the band-shaped packaging material YA2 supplied from the packaging material supply device 3 into a cylindrical shape. Specifically, the packaging machine main body 4 includes, for example, a bag making device 14, a center sealing device 16, a first conveying device 17, an upper holding device 18, a top sealing device (end sealing device) 30, and a second a second transport device 20, and so on.

The bag-making machine 14 makes the belt-shaped packaging material YA2 supplied from the packaging material supply device 3 into a cylindrical bag so that both edges in the width direction (conveyance width direction W) overlap each other. In addition, the bag making device 14 supplies the stacked product XA2 supplied from the article supply device 2 to the packaging material YA2 that is made into a cylindrical bag. As a result, the stack XA2 is wrapped in the tubular packaging material YA2. That is, the bag-making device 14 functions as a bag-making device that bends the packaging material YA2 so that both edges in the transport width direction W are overlapped to form a tubular shape.

Both edges of the packaging material YA2 superimposed by the bag making device 14 are pinched by the pinch rollers 15 as areas where the center seal portion is to be formed, and conveying force is applied. The center sealing device 16 sandwiches both edges of the polymerized packaging material YA2 between a pair of bar sealers 16a and heats them. Then, the center sealing device 16 presses both edges of the heated packaging material YA2 with the press rollers 16b to center-seal and form a center-sealed portion. The center seal device 16 may be a rotary center seal device in which the center seal portion is sandwiched between a pair of rollers or a plurality of rollers and heated.

The first conveying device 17 conveys the center-sealed tubular packaging material YA2 together with the stacked product XA2 wrapped in the packaging material YA2 on the conveying surface 25 toward the top sealing device 30 . The first conveying device 17 expands and contracts the conveying surface 25 in the conveying direction in accordance with the box motion of the top sealing device 30 .

The upper restraining device 18 is arranged above the first conveying device 17 and restrains the stack XA2 conveyed by the first conveying device 17 together with the packaging material YA2 from above. As a result, the stacked product XA2 is conveyed while maintaining its horizontal state.

A top sealing device (top sealing means, lateral sealing means, end sealing means) 30 cuts the cylindrical packaging material containing the stacked products XA2 at predetermined intervals, specifically, at a cut pitch corresponding to the length of the stacked products XA2. Each CP is top-sealed (end-sealed, laterally-sealed) in the width direction of the packaging material YA2 (conveyance width direction W, direction across the packaging material YA2), and cut. As a result, a top seal portion is formed, and a package (pillow package, secondary package) ZA2 of the stack XA2 is manufactured.

As an example, the top sealing device 30 is of a so-called box motion type having a pair of upper and lower top sealers 30a and 30b. While maintaining a state in which the sealing surfaces face each other, they move along a predetermined trajectory, and perform top sealing and cutting in the width direction of the film for each cut pitch CP corresponding to the length of the article. A film portion (top seal portion) to be sealed and cut by the top sealing device 30 is a predetermined position between the front and rear stacked products XA2. The top seal device 30 may be a rotary or linear reciprocating top seal device other than the box motion type.

In addition, the top sealing device 30 may, if necessary, before (or at the same time) top-seal the tubular packaging material YA2, to apply a Predetermined folding positions on both sides may be pushed inward by gusset claws (not shown) to form folding portions.

The second conveying device 20 is provided downstream from the top sealing device 30 . The second conveying device 20 is a belt conveyer that places the package ZA2 finished by the top sealing device 30 on a conveying surface 26 and conveys it to the next process.

Here, the packaging machine 1 of the present embodiment includes a misalignment prevention device 100 upstream of the bag making machine 14, for example. The misalignment prevention device 100 is
At the downstream end of the finger conveyor 2, the support of the finger 22 is released, and the stack XA2 accommodated in the packaging material YA2 is charged with static electricity. As a result, the individual primary packaging bodies ZA1 (the packaging materials YA1 of the stacked products XA2) are electrically attracted to each other, thereby preventing misalignment (disruption of stacking).

<Position deviation prevention device>
A misalignment prevention device 100 of the present invention will be described with reference to FIGS. 3 and 4. FIG. FIG. 3 is a schematic diagram showing the vicinity of the misalignment prevention device 100 extracted from the packaging machine 1 of FIG. C) is a side view seen from the upstream side, and FIG. 4D is a partially transparent front view of the charging means. 4A and 4B are diagrams showing a state in which the stacked product XA2 is charged, in which FIG. 4A is a front view corresponding to FIG. 3A, and FIG. A corresponding upper surface (plan view), FIG. 4(C) is a side view corresponding to FIG. 3(C).

Referring to FIG. 3, positional deviation prevention device 100 of the present embodiment has charging means 101, cover means 102, and gas supply means 103, and as an example, upstream from bag making machine 14, more specifically, It is arranged immediately upstream of the bag making machine 14 .

The charging means 101 is, for example, a device (charging device, generating static electricity) that charges a target object (in this case, each primary package ZA1 (packaging material YA1 of) constituting the stack XA2) by generating static electricity. Here, as an example, a non-contact type charging means 101 that charges the stack XA2 with static electricity in a non-contact manner is adopted.Since the charging means 101 is known, detailed description thereof will be omitted. However, for example, as shown in FIGS. 3(C) and 3(D), a DC high voltage generator (not shown) and a charging electrode 110 are provided, and a high voltage (plus or Ions created by applying a negative polarity) to the discharge needle 115 of the charging electrode 110 move toward the conveying surface 25 side of the finger conveyor 2, which is the ground side.

In this example, the finger conveyor 2 has a slit 205 provided along the transport direction T at approximately the center of the transport surface 25 in the transport width direction W, as shown in FIGS. It protrudes upward from below the conveying surface 25 via. Guide means (lateral guides) 206 covering the sides of the transport surface 25 are provided on both sides of the transport surface 25 in the transport width direction W. As shown in FIG. In this example, the side guides 206 are continuous with both ends of the conveying surface 25 and stand upright in the conveying height direction H (vertical direction). For example, the side guide 206 is set higher than the conveying height H of the stacked product XA2 so as to prevent the stacked product XA2 being transported from collapsing and falling from the transport surface 25 (Fig. 4(C)).

Further, in this example, a mounting portion 207 having a surface substantially parallel to the conveying surface 25 is provided at the upper end of the side guide 206 in the conveying height direction H, for example. The placement unit 207 may be, for example, a part of the frame of the packaging machine 1 (for example, a workbench). A substantially U-shaped space 108 is created by the transport surface 25 and the side guides 206 in a side view shown in FIG. See FIG. 4(C)). Hereinafter, the space 108 will be referred to as a transfer space. The side guide 206 and the conveying surface 25 may be separated within the range of the height of the primary package ZA1.

In this example, two chains 202 of the finger conveyor 2 are provided as shown in FIGS. 3(B) and 3(C). The first chain 202A and the second chain 202B are arranged parallel to each other in the transport width direction W and spaced apart from each other. A plurality of second fingers 22B are provided on the second chain 202B at predetermined intervals in the conveying direction T. As shown in FIG. The first chain 202A and the second chain 202B travel so that the first finger 22A and the second finger 22B are at predetermined relative positions in the conveying direction T. As shown in FIG. That is, one first finger 22A and one second finger 22B form a pair, and while supporting (nipping) one (one set) stacked product XA2 from the front and rear in the conveying direction T, it pushes from upstream to downstream ( Figure 4).

The finger conveyor 2 may be provided with a position adjusting mechanism capable of changing the relative positions of the first finger 22A and the second finger 22B, thereby adjusting the form of the accumulated goods XA2 (type and number of goods XA1, manner of accumulation). changes can be easily accommodated. At least the conveying surface 25 and the side guides 206 extending from below the charging means 101 to the vicinity of the bottom plate of the bag making machine 14 are made of an insulating material (synthetic resin as an example).

As shown in FIGS. 3B and 3C, a plurality of charging means 101 are provided in this example. Specifically, one charging means 101 has a substantially rectangular parallelepiped housing 101B and a plurality of discharge needles 115 provided therein, as shown in FIG. Here, as an example, five discharge needles 115 are arranged along the transport direction T in two rows in the transport width direction W in a zigzag pattern when viewed from above. The charging unit 101 is attached above the transport surface 25 so that the direction in which the discharge needles 115 are arranged in the longitudinal direction is along the transport direction T. As shown in FIG.
Two charging means 101 are arranged side by side in the conveying width direction W so as to sandwich the fingers 22 (the first finger 22A and the second finger 22B). In this example, the lower end of the charging means 101 in the conveying height direction H is located above, for example, the upper end of the side guide 206 (the mounting portion 207) and does not enter the conveying space 108, but the upper surface In the view (FIG. 3(B)), the finger 22 runs between the opposing charging means 101 .

The cover means 102 is a box-shaped body, and is arranged above the finger conveyor 2 so as to cover (house) the charging means 101 . As an example, the two charging means 101 are covered by the charging electrode 110 and the entire casing 101B by the cover means 102 . At least a part of the bottom of the cover means 102 (the surface facing the conveying surface 25) is open. In this example, the cover means 102 is mounted on the mounting portion 207 so as to cover a portion of the transfer space 108 whose upper surface is open (near the downstream side of the transfer space 108 extending in the transfer direction T). is configured to

Referring to FIG. 3(C), positional deviation prevention device 100 of the present embodiment has gas supply means 103 for ejecting low-humidity gas into cover means 102 . Here, the "low-humidity gas" is a gas with a lower humidity than the air around the packaging machine 1 (the air in the indoor space where the packaging machine 1 is arranged, the outside air), for example, It is air. The gas supply means 103 has a gas ejection port 111, a gas supply path 112, and a water removing means 113, as an example here. The moisture removing means 113 is, for example, a mist separator. The mist separator 113 is connected in the middle of the gas supply path 112, for example. Also, for example, the gas supply path 112 is inserted through a through hole provided in the cover means 102 , and the gas ejection port 111 is arranged inside the cover means 102 . Although illustration is omitted, it is desirable that a packing or the like be arranged around the through-hole to prevent gas leakage.

In this example, a through hole is provided in the upper surface 102TS of the cover means 102 and the gas supply path 112 is inserted therethrough. In other words, the gas ejection port 111 is positioned inside and above the cover means 102, and is configured to eject the low-humidity gas toward the bottom (the transfer space 108).

The gas supply means 103 takes in ambient air and removes moisture in the air by the mist separator 113 before reaching the gas ejection port 111 . Air (low-humidity gas) with a lower humidity than the surrounding air is jetted into the cover means 102 through the gas jet port 111 . As a result, the humidity in the interior of the cover means 102 and in the transport space 108 below the cover means 102 is lower than in the ambient air.

The low-humidity gas is not limited to air, and may be inert gas such as nitrogen gas. Also, the moisture removing means 113 is not limited to the mist separator 113, and may be a moisture removing filter, for example. Furthermore, as the low-humidity gas, for example, dry air generated by a dry air device may be supplied.

Referring to FIG. 4, a set of stacked products XA2 is supported from front to back in the transport direction T by first fingers 22A and second fingers 22B, and transported from upstream to downstream. In the positional deviation prevention device 100, the generated ions move to the transfer surface 25 side of the finger conveyor 2, which is the ground side. That is, when the stack XA2 passes under the misalignment prevention device 100, ions moving from the discharge needle 115 of the charging means 101 to the conveying surface 25 charge the packaging material YA1 of each primary package ZA1 with static electricity. As a result, (the packaging materials YA1 of) the primary packages ZA1 constituting the stack XA2 are attracted to each other, and the stacked state of the stack XA2 can be maintained.

At this time, the gas supply means 103 blows out the low-humidity gas into the cover means 102 as shown in FIG. As a result, the inside of the cover means 102 is filled with gas (air) having a lower humidity than the ambient air outside the cover means 102 . Also, the cover means 102 can prevent the ions generated by the displacement prevention device 100 from scattering outside the transfer space 108, for example.

In other words, the misalignment prevention device 100 of the present embodiment can generate ions by the charging means 101 while intensively ejecting low-humidity gas into the transfer space 108 below the cover means 102. The passing assemblage XA2 becomes electrostatically charged in a humidity-free atmosphere. Therefore, it is possible to prevent the discharge of static electricity, improve the adhesion between (the packaging materials YA1 of) the individual primary packages ZA1, and maintain the stacked state of the stack XA2.

In particular, by arranging the gas ejection port 111 above the inside of the cover means 102 and ejecting the low-humidity gas toward the bottom of the cover means 102 (the transfer space 108), ions are ejected in the gas ejection direction. It becomes easier to move, and this also enhances the charging effect of the stack XA2.

The fingers 22 (first finger 22A and second finger 22B) that support and push the stack XA2 retreat below the conveying surface 25 immediately upstream of the bag making machine 14 as the chain 202 circulates. In other words, although the stacked product XA2 is released from the support by the fingers 22, it can be stably supplied to the bag making machine 14 because the adsorption properties of the individual primary packages ZA1 are enhanced.

Here, in this example, the cover means 102 has a rectangular parallelepiped shape. It may protrude (extend) to the bag making device 14 to the extent that it does not interfere with the bag making device 14. This can reduce the chance of coming into contact with the surrounding air (outside air) even after passing through the charging means 101. As a result, the adhesion between (the packaging materials YA1 of) the individual primary packages ZA1 is enhanced, and the stacking of the stacked products XA2 is prevented from collapsing. can be supplied to

In this example, a part of the bottom surface of the cover means 102 is open. This is desirable because it minimizes ions and low humidity gases leaking into the air.

Further, in this embodiment, the positional deviation prevention device 100 is provided upstream of the bag making machine 14, and while the ions are concentrated in the transfer space 108 covered with the cover means 102, the ions are emitted to the outside of the cover means 102. ion emission can be minimized. Therefore, it is possible to prevent the belt-shaped packaging material YA2 (film) before being supplied to the bag making machine 14 from being charged. As a result, the packaging material YA2 is adsorbed to the bag making device 14 by static electricity, and the packaging material YA2 can be formed into a good cylindrical shape without obstructing the film transport, such as meandering.

By the way, in the case where the first finger 22A and the second finger 22B are made of, for example, a conductor (metal or the like), if the ions emitted from the charging means 101 move directly, the packing material of the article XA1 may be damaged. The charging effect may be reduced.

Therefore, in the present embodiment, the two charging means 101 are opposed to each other so as to sandwich the finger 22, and each charging means 101 is arranged so that the discharge needles 115 are aligned in the longitudinal direction along the transport direction T. . This increases the chances that the stack XA2 comes into contact with the ions, and further enhances the effect of charging the packing material of the item XA1 (FIG. 4(B)). Alternatively, the fingers 22 may be made of an insulating resin material, or may be provided with a cover made of an insulating resin material.

<Modification>
5 and 6 show a modification of this embodiment. FIG. 5 is a diagram for explaining a modification of the packaging machine 1 described above, and FIG. 5A is a front view showing a set of fingers 22 for conveying a set of stacked products XA2. The set of fingers 22 may include a third finger 22C between the first finger 22A and the second finger 22B. The third finger 22C is a partition means for partitioning a plurality of rows of articles ZA1' arranged in the transport direction T. As shown in FIG. Specifically, the stacked product XA2 in this example is an assembly (3 rows×6 rows) in which 6 rows of article groups ZA1′ in which primary packages ZA1 are stacked in 3 rows in the conveying height direction T are arranged in the conveying direction T. is. The third finger 22C is arranged, for example, between the three rows of articles ZA1' on the upstream side and the three rows of articles ZA1' on the downstream side, and divides the stacked articles XA2 into three rows. With only the first fingers 22A and the second fingers 22B, where the stacked products XA2 are long in the conveying direction T (in the case of multiple rows), there is a high possibility that the intermediate primary packages ZA1 will collapse. By providing the third finger 22C (partition means), collapse of the primary package ZA1 can be prevented.

The fingers 22 circulate and retreat below the conveying surface 25 at the downstream end of the finger conveyor 2. In the case of a configuration in which the fingers 22 are tilted downstream and retreated, the third finger 22C is replaced by the first finger 22A. and second finger 22B. Third finger 22C may be attached to both first finger 22A and second finger 22B. As a result, it is possible to avoid collapsing the downstream article group ZA1' due to the retraction of the third finger 22C.

Alternatively, the finger 22 (or the third finger 22C) may move up and down in the vertical direction (conveying height direction H).

FIG. 5B is a front view of the vicinity of the misalignment prevention device 100. FIG. The gas ejection port 111 of the gas supply means 103 may be arranged, for example, on the upstream side surface 102FS of the cover means 102 so as to eject the low-humidity gas toward the downstream side surface 102FB of the cover means 102 . By doing so, the leakage of the low-humidity gas to the upstream side of the misalignment prevention device 100 is suppressed, and the low-humidity gas is also supplied into the cylindrical packaging material YA2 formed by the bag making device 14. At the same time, ions can be moved.

Further, the gas ejection port 111 is not limited to being installed only on one surface of the cover means 102, and may be arranged on a plurality of surfaces such as the upper surface 102TS and the upstream side surface 102FS. Also, the ejection angle of the gas ejection port 111 and the position of the gas ejection port 111 may be adjustable.

FIG. 5C is a side view of the misalignment prevention device 100 viewed from the upstream side. Only one charging unit 101 may be provided. In this case, it is preferable that the direction in which the plurality of discharge needles 115 are arranged in the longitudinal direction of the charging means 101 is arranged along the width direction W of conveyance.

FIG. 6 shows an example of a packaging machine 1 according to another embodiment, in which FIG. 6(A) is a front view and FIG. 6(B) is a plane (top view). As shown in FIG. 6, for example, the packaging machine 1 arranges the misalignment prevention device 100 upstream of the supply position Pin of the article to be packaged XA2, and charges the packaging material YA2 passing through it. A configuration may be adopted in which the packaged item XA2 is supplied at the supply position Pin onto the packaging material YA2 that has been folded. In this case, the article to be packaged XA2 is, for example, a stack of articles XA1 (primary package ZA1) similar to those in the above embodiment, and the conveying surface 25 is preferably a conveying device such as a suction belt.

Specifically, for example, instead of the two chains 202 in the packaging machine 1 of the above embodiment, an endless belt 222 that circulates is provided, and a large number of through holes 221 are provided in the endless belt 222 . In this case, for example, the endless belt 222 conveys the item XA2 to be packaged, and the endless belt 222 serves as the conveying surface 25 . Furthermore, a suction device 230 is arranged at a predetermined position below the endless belt 222 (conveying surface 25). That is, a hollow suction box 223 is arranged so as to abut on the lower surface of the endless belt 222 that constitutes the conveying surface 25, and a large number of through holes or openings (not shown) are formed in the upper surface of the suction box 223. It is also connected to a vacuum pump 225 via a pipe 224 connected to an outlet formed below.

With such a configuration, when the vacuum pump 225 is operated, the negative pressure sucks the endless belt 222 through the pipe 224 and the suction box 223, and further through the through holes 221 formed in the endless belt 222. to suck the belt-shaped packaging material YA2 that is being conveyed. Then, the items to be packaged (accumulated items XA2) may be sequentially placed (supplied) at the position of the suction box 223 at a predetermined timing manually or by a robot.

In the packaging machine 1 of FIG. 6, the item XA2 to be packaged may be, for example, a single item (single item) whose surface can be charged at least. That is, it may be a single primary package ZA1 wrapped in an electrostatically chargeable packaging material, or a single unwrapped article XA1 whose surface is made of an electrostatically chargeable material. In this case, by causing the packaging material YA2 charged by the misalignment prevention device 100 and the item to be packaged XA2 to adhere to each other, the item to be packaged XA2 inside the packaging material YA2 (cylindrical film) made into a tubular bag is placed on top. It is possible to suppress the occurrence of biting due to displacement of the seal portion. Furthermore, in this case, the misalignment prevention device 100 is arranged downstream of the supply position Pin, and the packaging material YA2 and the packaged article XA2 (single article XA1 (primary package) placed on the packaging material YA2 ZA1) or a stack of articles XA1) may be charged together.

In addition, in the packaging machine 1 that supplies the to-be-packaged item XA2 to the belt-shaped packaging material YA2 being conveyed, forms the packaging material YA2 into a cylindrical bag, performs center sealing and top sealing, and cuts the packaging material YA2, The articles to be packaged (collected articles XA1 (or primary packages ZA1, the same shall apply hereinafter)) XA2 placed on the belt-like packaging material YA2 or the article group ZA1' are electrified to prevent misalignment. good too. In this case, it is particularly effective for a lightweight article XA1 that is likely to be misaligned.

Although not shown, one or more charging means 101 is provided with a desired moving mechanism, and each charging means 101 is moved in the transport width direction W, the transport direction T, and the transport height direction H according to the shape of the stack XA2. It may be movable.

Also, the item to be packaged 2 may not be the primary package ZA1. That is, it may be a collection of unpackaged articles XA1, provided that the surface is chargeable.

Further, the finger 22 travels to the inside of the bag making machine 14 so as to be able to convey the stack XA2 inside the packaging material (cylindrical film) YA2 formed into a tubular shape. The inner stack XA2 may be charged via a tubular film. Further, the charging means 101 may electrify the accumulated product XA2 being conveyed through the tubular film by the finger 22 in the tubular film.

In addition, the stacked product XA2 may be a stacked product XA2 in which the stacked products XA1 are stacked such that the products XA1 are partially overlapped by shifting them sideways when stacked, or in which the products XA1 are erected and arranged in the transport direction. good.

Further, the misalignment prevention device 100 may be placed on a moving means (pedestal or the like) that moves along the transport direction T, and may be moved from upstream to downstream along with the transport of the stack XA2.

Further, a static elimination device for eliminating the static charge of the stacked products XA2 may be arranged downstream of the top sealing device of the packaging machine 1 or the like.

In the above example, the pillow packaging machine is used as an example, but the packaging machine 1 may be a three-side seal packaging machine, a four-side seal packaging machine, a shrink packaging machine, or the like.

Moreover, the charging means 101 may be located inside the cover means 102 at least at the lower portion (the tip portion of the discharge needle 115 ), and the upper portion may be exposed from the cover means 102 .

Further, the positional deviation prevention device 100 may be arranged in the upstream direction of the finger conveyor 2 . In that case, the cover means 102 should be long in the conveying direction T so as to cover the vicinity of the bag making machine 14 .

As described above, the present invention is not limited to the above-described embodiments, and various modifications are possible without departing from the gist and technical idea of the present invention.

1 packaging machine 2 article supply device (finger conveyor)
3 Packaging Material Feeding Device 4 Packaging Machine Main Body 8 Original Fabric Shaft 9 Roller 14 Bag Making Machine 22 Finger 22A First Finger 22B Second Finger 22C Third Finger 25 Conveying Surface 30 Top Sealing Device (End Sealing Device)
REFERENCE SIGNS LIST 100 Positional deviation prevention device 101 Charging means 101B Case 102 Cover means 103 Gas supply means 108 Transfer space 110 Charging electrode 111 Gas ejection port 112 Gas supply path 113 Moisture removal means (mist separator)
115 discharge needle 202 chain 202A first chain 202B second chain 205 slit 206 guide means (lateral guide)
XA1 Article ZA1' Article group XA2 Packaged article (collected article)
YA1 Packaging material YA2 Packaging material YB1 Original fabric roll ZA1 Primary package ZA2 Secondary package

Claims (7)

charging means;
cover means;
a low humidity gas supply means,
While ejecting the low-humidity gas into the interior of the cover means, electrifying an item to be packaged or a packaging material for packaging at least the item to be packaged, which passes under the cover means;
A misalignment prevention device characterized by: A plurality of the charging means are provided in a direction intersecting the moving direction of the packaged item.
The displacement prevention device according to claim 1, characterized in that: The means for supplying the low-humidity gas comprises a mist separator,
3. The positional deviation prevention device according to claim 1 or 2, characterized in that: The article to be packaged is an integrated article in which a plurality of primary packages are laminated,
4. The misalignment prevention device according to any one of claims 1 to 3, characterized in that: A packaging machine comprising the misalignment prevention device according to any one of claims 1 to 4. a conveying means for conveying the item to be packaged;
a bag making machine for forming the band-shaped packaging material into a tubular shape;
sealing means for sealing, at predetermined intervals, the tubular packaging material that is formed into a tubular shape by the bag making machine and contains the packaged item;
The cover means is a box-shaped body arranged above the conveying means and having at least a part of the bottom open,
Disposing the positional deviation prevention device upstream from the bag making machine,
The packaging machine according to claim 5, characterized in that: the conveying means includes pushing means for supporting the packaged item from the front and rear in the conveying direction and pushing the item in the conveying direction;
A guide means covering the side of the conveying surface of the conveying means,
The charging means are arranged so as to sandwich the pushing means.
7. The packaging machine according to claim 6, characterized in that:

Images