JP2018062362A - Packaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging device in which big generation of static electricity can be suppressed and possibility of inviting contamination to a resin sheet can be excluded even in a case where the resin sheet is drawn long and fast.SOLUTION: A packaging device comprises a device housing 10, a packaging roll body 20 which is set at the housing 10, a roller group 30 which is included inside of the housing 10 and slides on and contacts to a wrap film 22 of the packaging roll body 20, and a cutting blade 40 which is provided at the downstream of the roller group 30 and can cut the wrap film 22 drawn from the packaging roll body 20. A charging suppression function for the wrap film 22 is given to one sandwiching roller 32A which is positioned nearest to the operator side and most downstream in the roller group 30. Because peeling charging suppression treatment is applied to the one sandwiching roller 32A, a charging amount of the warp film 22 is effectively reduced. Therefore, even if a polyvinyl chloride-made wrap film 22 is drawn long and fast, pain generation and uncomfortableness feeling can be prevented at a fingertip or an arm which draws the wrap film 22.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a packaging device used for packaging food, fruits and vegetables, gardening supplies, and the like.

  Conventionally, a simple packaging device for food has been used for packaging food trays containing meat, seafood and the like. Although not shown, this type of packaging apparatus includes a casing of the apparatus and a packaging roll body that is exchangeably supported by the casing. The wrap film is manually pulled out from the packaging roll body, and the drawn wrap film is removed. A food tray is wrapped and packaged, and then the wrapped wrap film is cut to a predetermined length (see Patent Document 1).

  The casing of the apparatus is partitioned and formed into a hollow box shape by a predetermined steel plate, and is configured so that the packaging roll body can be easily replaced. The packaging roll body includes a cylindrical core, and a transparent belt-shaped wrap film is wound around the core for a predetermined length. The wrap film is formed into a flexible thin film with polyolefin (PO) with excellent airtightness, inexpensive polyvinyl chloride (PVC) with excellent gas permeability and adhesiveness, etc., and is in close contact with the outer peripheral surface of the core. It is wound in multiple layers.

Japanese Utility Model Publication No. 07-013856

  The conventional packaging apparatus is configured as described above, and although importance is attached to the durability of the casing and the ease of replacement of the packaging roll body, the packaging roll is not particularly focused on the countermeasure against static electricity of the wrap film. When pulling out the wrap film from the body, static electricity (also referred to as peeling charge) is generated, which may cause discharge. This static electricity is generated when (1) the wrap film is pulled out long, (2) when the wrap film is pulled out fast, (3) when the wrap film is made of polyvinyl chloride with a large amount of electronegativity or charge change. (4) When the packaging device is used when the air is dry, the amount of generation is large.

  Therefore, for example, when a wrap film made of polyvinyl chloride is pulled out long and vigorously and quickly, a large amount of static electricity is generated, and the fingertip that pulls out the wrap film may be painful or uncomfortable. In addition, there is a possibility that the safety of the packaging work may be hindered due to the discharge into the air. In the case where a polyolefin wrap film is long and quickly pulled out during the air drying period, there is a possibility that a problem may occur in the workability and safety of the packaging operation as described above.

  As a technique for solving such a problem, a SUS fine wire twisted yarn that is positioned at right angles to the pulling direction of the wrap film is stretched between both sides of the housing, and the twisted yarn is positioned in a non-contact manner above the wrap film. A method of neutralizing the charge can be considered. However, this method is based on the premise of suppressing the peeling charge of industrial films in different fields, and although it can suppress the peeling charge of the wrap film, the twisted metal powder falls and adheres to the wrap film. In view of food hygiene, it is extremely difficult to adopt for food tray packaging.

  The present invention has been made in view of the above, and even if the resin sheet is long and fast, generation of large static electricity can be suppressed, and the possibility of causing contamination of the resin sheet can be eliminated. The object is to provide a packaging device.

  In order to solve the above-mentioned problems in the present invention, a packaging roll body in which a resin sheet is wound around a core, a group of rollers in contact with the resin sheet of the packaging roll body, and a packaging roll provided downstream of the group of rollers. And a cutting member capable of cutting the resin sheet drawn out from the body, and among the roller group, the most downstream roller is provided with a charge suppressing function for the resin sheet.

In addition, the packaging roll body and the roller group include at least a housing containing the roller group, and the housing has a discharge port for discharging the resin sheet fed from the most downstream roller of the roller group from the inside of the housing to the outside. The casing surface is partitioned into an upper surface and a lower surface, and a packaging work area is formed on one of the upper surface and the lower surface, and the other is a heating member for a resin sheet. Can be provided.
Moreover, the accommodation area | region for packaging roll bodies can be formed in the inside back of a housing, and the lid | cover which opens and closes an accommodation area can be rotatably attached to the wall of a housing.

The roller group includes a plurality of rotatable support rollers that support the packaging roll body, and a plurality of rotatable rollers that are disposed downstream of the plurality of support rollers and sandwich the resin sheet fed from the packaging roll body. A sandwiching roller, and at least one of the plurality of sandwiching rollers may be the most downstream roller.
Further, the most downstream roller can have a charge suppressing function by attaching a tape made of polytetrafluoroethylene resin (tetrafluoroethylene resin) to the peripheral surface.

The most downstream roller includes a roller core and an elastic elastomer layer formed on the peripheral surface of the roller core. The surface of the elastomer layer is made of polytetrafluoroethylene resin (tetrafluoroethylene resin). It is possible to have a charge suppression function by attaching the tape.
Further, the most downstream roller includes a roller core and an elastic elastomer layer formed on the peripheral surface of the roller core, and the elastomer layer includes a molding material containing polytetrafluoroethylene resin (tetrafluoroethylene resin). It is also possible to have a charge suppressing function by molding with.

  Here, the resin sheet in the claims includes a resin film in addition to the resin sheet. Specifically, a film made of at least polyolefin or polyvinyl chloride is included. This resin sheet is used for packaging a packaged item, and the packaged product includes at least various foods and fruits and vegetables, trays and piles to store them, gardening supplies, and the like.

  The casing is preferably grounded on the chassis using a ground terminal or the like from the viewpoint of stability of the operation of the packaging device. A brake member such as a screw for adjusting the rotation of the packaging roll body can be attached to the housing. In addition, the surface of the housing is divided into an upper surface and a lower surface having a height difference, the lower surface is positioned in front of the upper surface, a packaging work area is formed on the upper surface, and the resin sheet adheres to the lower surface. Heating members can be provided. Furthermore, the packaging device according to the present invention may be a manual packaging machine or an automatic packaging machine.

  According to this invention, when packaging a to-be-packaged object with a resin sheet, the resin sheet of a packaging roll body is drawn out and wound around a to-be-packaged object. At this time, the most downstream roller in contact with the resin sheet in the group of rollers in contact with the resin sheet exhibits a charge suppressing function, so that charging of the resin sheet can be suppressed regardless of the material of the resin sheet. When the resin sheet is wound around the package object, the resin sheet is cut with a cutting member, and then, if necessary, the sides of the cut resin sheet are folded and stacked on the package object side, thereby packaging the package object. Can be packaged with a resin sheet.

  According to the present invention, since the charging suppression function for the resin sheet is imparted to the most downstream roller, even if the resin sheet is drawn long and fast, generation of large static electricity can be suppressed. There is an effect that the possibility of causing contamination of the sheet can be eliminated.

  According to the second aspect of the present invention, if the article to be packaged is arranged in the packaging work area of the housing and the position and posture thereof are stabilized, the resin sheet of the packaging roll body is pulled out from the discharge port and the article to be packaged. Can be wrapped around properly. Moreover, if the resin sheet which wraps a to-be-packaged object is pressed on a heating member, since a resin sheet can be closely_contact | adhered to a to-be-packaged object or resin sheets can be contact | adhered appropriately, the improvement of sealing performance can be expected. . This effect is particularly significant when the self-adhesiveness of the resin sheet such as polyolefin is low.

  According to invention of Claim 3, since a packaging roll body is rotatably supported by several support rollers, the attitude | position of a packaging roll body can be stabilized and can be rotated smoothly. Further, since the plurality of support rollers are not simply supported by the plurality of support rollers but are supported by being sandwiched, the force with which the resin sheet is pulled back when the resin sheet is cut can be weakened. Further, since the resin sheet is sandwiched and held by the plurality of sandwiching rollers, it is possible to suppress the resin sheet from dropping off.

  According to the invention described in claim 4, since a tape made of polytetrafluoroethylene resin having a low friction coefficient and excellent antistatic property is attached to the peripheral surface of the most downstream roller, and this tape is brought into contact with the resin sheet. Regardless of the material of the roller, it is possible to reliably impart a charge suppression function with a simple configuration. Further, since an existing roller can be used, it is not necessary to newly use a dedicated roller having a charging suppression function, and cost reduction can be expected.

  According to the invention described in claim 5, since a tape made of polytetrafluoroethylene resin having a low friction coefficient and excellent antistatic property is applied to the elastomer layer of the most downstream roller, and this tape is brought into contact with the resin sheet. Regardless of the material of the elastomer layer, it is possible to reliably impart a charge suppressing function. Further, when forming the elastomer layer, it is not necessary to add an antistatic additive or the like to the elastomer material, so that there is little possibility of impairing the adhesion and storage stability of the elastomer layer.

  According to the invention of claim 6, the polytetrafluoroethylene resin, which is excellent in non-adhesiveness and the like and has a low friction coefficient, imparts a peeling charge suppressing function to the elastomer layer itself of the most downstream roller. It is not necessary to take a long time to stick the resin tape carefully to prevent wrinkles and air from entering, and it can be expected to improve the workability of the roller.

It is a whole perspective explanatory view showing typically an embodiment of a packaging device concerning the present invention. It is explanatory drawing which shows typically embodiment of the packaging apparatus which concerns on this invention. It is a fragmentary sectional view showing typically the relation between one clamping roller and polytetrafluoroethylene resin-made adhesive tape in an embodiment of the packaging device according to the present invention. It is whole perspective explanatory drawing which shows typically 2nd Embodiment of the packaging apparatus which concerns on this invention. It is explanatory drawing which shows typically 2nd Embodiment of the packaging apparatus which concerns on this invention.

  Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, a packaging device according to the present embodiment includes a housing 10 on which a food tray 1 can be mounted, and the housing 10. A wrapping roll body 20 that is set to be rotatable, a roller group 30 that is built in the housing 10 and that is in sliding contact with the wrap film 22 of the wrapping roll body 20, and is mounted downstream of the roller group 30 to package the food tray 1. And a cutting blade 40 for cutting the wrap film 22, and a polytetrafluoroethylene resin that contributes to food hygiene in the roller group 30 with the anti-static function for the wrap film 22 in the most downstream roller 35. It is given by.

  As shown in FIG. 2, the food tray 1 is formed into a substantially rectangular white tray, black tray, wood grain tray, handle tray, etc., with an inexpensive polystyrene resin having excellent processability and mass productivity, etc. Contains foods such as lump meat, seafood and side dishes. Further, if necessary, it is formed into a transparent tray excellent in light transmittance and the like with a biaxially stretched polystyrene resin.

  As shown in FIGS. 1 and 2, the casing 10 is partitioned into a hollow box shape that is long in the lateral direction, for example, by a galvalume steel plate, a stainless steel plate, or the like that is excellent in rust prevention and durability. The surface of the housing 10 is divided into an upper surface 12 having a height difference and a pair of front and rear first and second lower surfaces 13 and 13A by a pair of inclined front and rear steps 11.

  The upper surface 12 is formed in a horizontally long planar rectangle, is interposed between the first and second lower surfaces 13 and 13A, and is formed in a flat packaging work area 14 on which the food tray 1 can be mounted. A discharge port 15 for a wrap film 22 extending in the left-right lateral direction is perforated into an elongated groove shape in the front portion of the upper surface 12 that is the packaging work area 14, and the wrap film 22 that has passed through the discharge port 15 is the housing 10. Exposed from inside to outside.

  The first and second lower surfaces 13 and 13A are a flat first lower surface 13 positioned in front of the upper surface 12 via a step 11 and a first lower surface 13 positioned behind the upper surface 12 via a step 11. A flat heat board 17 that generates heat at a predetermined temperature by the operation of the adjustment switch 16 of the front step 11 is mounted on the first lower surface 13 located in front of the second lower surface 13A. Due to the heat generated by the heat board 17, the wrap film 22 wrapping the food tray 1 is heat-welded and sealed to the food tray 1. The sealing with the heat board 17 can be omitted when the self-adhesiveness of the wrap film 22 is strong.

On the other hand, the packaging roll body 20 is set in an exposed state on the second lower surface 13A located rearward so as to be exchangeable. In addition, a brake screw that adjusts the rotation of the packaging roll body 20 set on the second lower surface 13A and the tension state of the wrap film 22 is screwed into the lower rear of the side wall of the housing 10 in a rotatable manner.
The front step 11 includes an adjustment switch 16 for the heat board 17, a main switch 18 for a packaging device that can be pressed, and a main lamp that lights and notifies the ON state of the main switch 18. Arranged.

  As shown in FIG. 1 and FIG. 2, the packaging roll body 20 includes a cylindrical core 21, and a transparent strip-shaped wrap film 22 is wound around the core 21 by a rewinding machine with a predetermined length. The The winding core 21 is formed in a cylindrical shape having excellent dust resistance, surface smoothness, and the like by, for example, winding recycled paper in a spiral winding.

  The wrap film 22 is made of polyolefin excellent in airtightness, inexpensive polyvinyl chloride excellent in gas permeability and transparency, polyvinylidene chloride excellent in antifouling property and moisture resistance, biaxial excellent in heat resistance and moisture resistance, etc. A flexible thin film is formed from stretched polypropylene, polyethylene, or the like, and is wound in multiple layers while being in close contact with the outer peripheral surface of the core 21 by a flat winding method. The wrap film 22 has a size larger than the food tray 1 such as 20 cm × 500 m, 30 cm × 750 m, 35 cm × 300 m, 40 cm × 750 m, 45 cm × 1000 m, 50 cm × 1000 m, etc.

  As shown in FIG. 2, the roller group 30 includes a pair of rotatable support rollers 31 that horizontally support the lower portion of the packaging roll body 20, and a packaging roll body that is disposed downstream of the pair of support rollers 31. And a pair of rotatable sandwiching rollers 32 that sandwich the wrap film 22 fed out from 20, and among the pair of sandwiching rollers 32, at least one sandwiching roller 32A in the foremost position located closest to the operator is the most downstream. This roller 35 is used.

  The pair of support rollers 31 is pivotally supported at a predetermined interval behind the housing 10 and functions to support the lower portion of the packaging roll body 20 in a rotatable manner and to stabilize its posture horizontally. A circular restriction plate that restricts the displacement of the packaging roll body 20 in the axial direction is fitted to at least one of the pair of support rollers 31. Moreover, the wrap film 22 of the packaging roll body 20 is wound around the peripheral surface of one support roller 31A located in front of the pair of support rollers 31, and is tilted up toward the discharge port 15 of the casing 10 and pulled up. It is done. Each support roller 31 is formed in a cylindrical shape from, for example, a steel pipe, stainless steel, aluminum, or the like, and is rotatably supported between both inner sides of the housing 10.

  The pair of sandwiching rollers 32 are pivotally supported on the upper side of the housing 10 so as to face each other and are located directly below the discharge port 15. The pair of sandwiching rollers 32 sandwich the wrap film 22 wound around the one support roller 31 </ b> A and lifted. The film 22 functions to restrict the drawing direction of the film 22 to an appropriate direction and to prevent the wrap film 22 from falling off. Each sandwiching roller 32 is formed in a columnar shape with a diameter smaller than that of the support roller 31, for example, by a steel pipe, stainless steel, aluminum, or the like, and is rotatably supported between both sides of the housing 10.

  As shown in FIG. 3, each sandwiching roller 32 has an elongated roller core 33 that is rotatably supported between both inner sides of the housing 10, and a wrap film that is integrally formed on the peripheral surface of the roller core 33. The elastic layer 34 may be formed in a substantially cylindrical shape having a diameter smaller than that of the support roller 31.

  In this case, the roller core 33 is formed of, for example, a steel pipe, stainless steel, aluminum, synthetic resin, or the like in a single-flange type, a flange-integrated type, a double-flange type, or a rotary type. In addition, the molding material for the elastomer layer 34 is not particularly limited. For example, a silicone rubber that is excellent in heat resistance and durability, has a small compression set, and can be reduced in hardness, weather resistance and chemical resistance. For example, chloroprene rubber, which is excellent in food properties and easily adaptable to food, and nitrile rubber, which has excellent oil resistance, are used.

  As shown in FIGS. 1 and 2, the cutting blade 40 is formed in, for example, an elongated and sharp plate, and is attached to the front portion of the upper surface 12 of the housing 10 in an upright state and is adjacent to the front of the discharge port 15. The cutting blade 40 is heated together with the heat generated by the heat board 17 as necessary. A plurality of saw teeth are continuously arranged in the longitudinal direction at the upper end of the cutting blade 40 as necessary.

  As shown in FIG. 2, the most downstream roller 35, in other words, the first nipping roller 32A located closest to the operator side, has a polytetrafluoroethylene resin having excellent antistatic properties on the peripheral surface (surface). The adhesive tape 50 made of (PTFE) is adhered, and the adhesive tape 50 made of polytetrafluoroethylene resin is brought into sliding contact with the wrap film 22. This one sandwiching roller 32A is excellent in non-adhesiveness, slipperiness, etc., and the adhesive tape 50 made of polytetrafluoroethylene resin having a low friction coefficient is adhered, so that the frictional resistance value becomes small. The suppression function is exhibited to suppress the charge amount of the wrap film 22.

  The polytetrafluoroethylene resin-made adhesive tape 50 is excellent in food hygiene, for example, and is laminated on at least one side of the polytetrafluoroethylene resin base material that is in sliding contact with the wrap film 22 and the polytetrafluoroethylene resin base material. From the viewpoint of facilitating the adhesion work by providing the laminated structure with a silicone-based or acrylic-based adhesive material layer that adheres to the peripheral surface of one clamping roller 32A, preferably 0.13- The total thickness is about 1.9 mm, more preferably about 1.1 to 1.8 mm.

  Specific examples of the pressure-sensitive adhesive tape 50 made of polytetrafluoroethylene resin include an Azflon (registered trademark) tape (manufactured by AZONE Corporation: product name) coated with a silicone-based pressure-sensitive adhesive material and excellent in heat resistance and chemical resistance. Examples thereof include a semiconductive Nitoflon (registered trademark) tape (manufactured by Nitto Denko Corporation: product name) coated with an acrylic adhesive.

  When the elastic elastomer layer 34 is integrally formed on one clamping roller 32A, the adhesive tape 50 made of polytetrafluoroethylene resin adheres in a cylindrical shape to the surface of the elastomer layer 34 as shown in FIG. Then, it comes into sliding contact with the wrap film 22.

  In the above configuration, when packaging the food tray 1 with the wrap film 22, first, the packaging roll body 20 is set on the second lower surface 13 </ b> A located at the rear of the casing 10, and the packaging roll body 20. The wrap film 22 is sequentially wound manually around the roller group 30 shown in FIG. 2, and the tip of the wrap film 22 is slightly exposed from the discharge port 15 of the housing 10, and then the adjustment switch 16 is operated to heat the wrap film 22. The board 17 is heated to a temperature optimal for welding the wrap film 22. At this time, when the wrap film 22 is made of polyvinyl chloride having a strong self-adhesive property, the heat generation operation of the heat board 17 can be omitted.

  When the heat board 17 generates heat and the packaging operation can be started after a predetermined time has elapsed, the food tray 1 is positioned and arranged in the packaging work area 14 of the housing 10 and the wrap film 22 of the packaging roll body 20 is discharged. The food tray 1 is partly packaged by pulling out the food tray 1 by hand from 15 and quickly wrapping it around the food tray 1 from above, slightly lifting the food tray 1 and overlapping the front end side of the wrap film 22 on the bottom.

  At this time, one of the roller groups 30 in the last slidable contact with the holding roller 32A is subjected to a peeling charge suppressing process by the adhesive tape 50 made of polytetrafluoroethylene resin having low surface free energy and excellent antistatic properties. Therefore, charging of the wrap film 22 can be effectively suppressed. Further, since the adhesive tape 50 is made of harmless polytetrafluoroethylene resin unlike carbon or the like, the safety of the food tray 1 with respect to food is not impaired at all.

  When the food tray 1 is partially packaged, the food tray 1 is moved from the packaging work area 14 to the lower heat board 17 side while pulling out the wrap film 22, and the wrap film 22 at the bottom of the food tray 1 is placed on the heat board 17. And the wrap film 22 partially wrapped with the food tray 1 is cut in the vicinity of the cutting blade 40. At this time, the heat welding function of the heat board 17 brings the bottom of the food tray 1 and the wrap film 22 into close contact with each other to improve the sealing performance, so that the food freshness of the food tray 1 can be expected to be maintained.

  When the wrap film 22 is cut in the vicinity of the cutting blade 40, both sides of the cut wrap film 22 are sequentially folded downward and stacked on the bottom side of the food tray 1, and then both sides of the wrap film 22 folded on the heat board 17. If the parts are brought into pressure contact with each other, the food tray 1 can be sealed with the wrap film 22 and individually wrapped. At this time, the heat board 17 brings both sides of the wrap film 22 and the wrap film 22 facing the bottom side of the food tray 1 into close contact with each other to improve the sealing performance. I can expect.

  According to the above, since the peeling electrification suppressing process is performed on the one sandwiching roller 32A located closest to the operator, the charge amount of the wrap film 22 can be extremely effectively reduced. Therefore, even if the wrap film 22 made of polyvinyl chloride, which is easily charged, is continuously long and quickly pulled out, it is effective to cause pain or discomfort due to electric shock on the fingertip or arm where the wrap film 22 is pulled out. Can be blocked. Moreover, since discharge into the air can be prevented, the safety of the packaging operation can be ensured.

  In addition, as a countermeasure against static electricity, it is not necessary to perform packaging work in an environment with a high humidity atmosphere, and the working environment is not restricted. Therefore, the convenience of packaging work can be greatly improved. Further, even if the polyolefin wrap film 22 is continuously long and quickly pulled out during air drying, it is possible to improve the workability and safety of the packaging operation. Further, since no SUS fine wire twisted yarn is required, it is possible to very effectively eliminate the possibility that the twisted metal powder will drop and adhere to the wrap film 22 and cause contamination. Therefore, it is possible to greatly contribute to the sanitization of the packaging of the food tray 1.

  Moreover, since the polytetrafluoroethylene resin-made adhesive tape 50 which is slidably contacted with the wrap film 22 can be attached as needed, the existing sandwiching roller 32 can be used as it is, and a dedicated anti-static function is provided. There is no need to newly use the pinching roller 32. Further, when the elastomer layer 34 is integrally formed on the one sandwiching roller 32A, if the adhesive tape 50 made of polytetrafluoroethylene resin is adhered to the elastomer layer 34, the peeling is performed regardless of the material and properties of the elastomer layer 34. A charge suppression function can be reliably imparted.

  In addition, since the heat board 17 is positioned lower than the back of the packaging work area 14, the workability of the packaging work of packaging the food tray 1 while pulling out the wrap film 22 can be greatly expected. Furthermore, since the lower part of the packaging roll body 20 is clamped between the pair of support rollers 31, the force with which the wrap film 22 is pulled back when the wrap film 22 is cut can be weakened.

  Next, FIG. 4 and FIG. 5 show a second embodiment of the present invention. In this case, an accommodation area 60 for accommodating the packaging roll body 20 in a replaceable manner is formed in the interior rear of the housing 10. A lid plate 61 that opens and closes the housing area 60 is swingably attached to the rear wall of the housing 10 via a hinge or the like, so that the second lower surface 13A on the surface of the housing 10 is omitted.

The lid plate 61 is formed, for example, in a substantially L-shaped cross section or a flat plate shape, and allows the packaging roll body 20 to be attached / detached when the accommodation area 60 is opened. On the other hand, when the accommodation area 60 is closed, the upper surface 12 on the surface of the housing 10, that is, the packaging work area 14 is substantially flush and functions to expand the packaging work area 14 rearward. The other parts are the same as those in the above embodiment, and the description thereof is omitted.
Also in this embodiment, the same effect as the above embodiment can be expected, and since the packaging roll body 20 is accommodated in the housing 10, it is clear that the packaging roll body 20 can be prevented from being contaminated. is there.

  In the above embodiment, the upper surface 12 of the housing 10 is used as the packaging work area 14, and the heat board 17 is provided on the first lower surface 13 of the housing 10. However, the heat board 17 is provided on the upper surface 12 of the housing 10, The first lower surface 13 of the housing 10 may be used as the packaging work area 14. In addition, the heat board 17 may be fixed to the first lower surface 13, but the heat board 17 may be mounted on the first lower surface 13 so as to be movable up and down. Further, the discharge port 15 and the cutting blade 40 may be disposed at the front step 11.

  In the above-described embodiment, an example in which the adhesive tape 50 made of polytetrafluoroethylene resin is adhered to the surface of the elastomer layer 34 of one sandwiching roller 32A has been shown. You may adhere | attach the adhesive tape 50 made from a tetrafluoroethylene resin, respectively. The casing 10 may be provided with a tension mechanism that quickly separates the wrap film 22 and the cutting blade 40 by a spring when the wrap film 22 is cut.

  Further, the sandwiching roller 32 includes a roller core 33 that is rotatably supported between both inner sides of the housing 10, and an elastic elastomer layer 34 that is formed on the peripheral surface of the roller core 33 and that is in sliding contact with the wrap film 22. By forming and molding this elastomer layer 34 with a polytetrafluoroethylene resin-containing molding material having excellent antistatic properties, a charge suppression function can be imparted. The molding material in this case can be prepared by kneading a silicone rubber, chloroprene rubber, nitrile rubber or the like with a polytetrafluoroethylene resin having excellent non-stickiness and the like and having a low friction coefficient.

  As molding methods using this molding material, (1) an extrusion molding method using a melt extruder, (2) a molding method in which a molding material is filled with a molding material, and heated and pressed by a press machine, (3) There is a casting method in which a mold is filled with a liquid molding material and heated in an oven. If the elastomer layer 34 itself is provided with a peeling charge suppressing function, it is not necessary to stick carefully over time so that wrinkles do not occur on the adhesive tape 50 made of polytetrafluoroethylene resin, and the workability is greatly improved. I can expect.

Hereinafter, examples of the packaging apparatus according to the present invention will be described together with comparative examples.
[Example 1]
First, a food packaging device called a handler upper is prepared, and a packaging roll body is set. Among the pair of most downstream clamping rollers of this packaging device, polytetrafluoroethylene is disposed on the peripheral surface of one clamping roller. After giving the antistatic function for wrap film by sticking the resin adhesive tape, when the wrap film is pulled out to the tray size, the peeling charge amount and temperature when the wrap film is pulled out continuously and quickly The humidity was measured and the results are summarized in Table 1.

  As a packaging device, ARC Co., Ltd. handler top MULTI 460B (product name: product number) was used. Moreover, the polytetrafluoroethylene resin-made adhesive tape used the Nitoflon (trademark) tape (Nitto Denko Co., Ltd. product name). For the packaging roll and its wrap film, a commercial wrap film made of polyvinyl chloride (manufactured by Shin-Etsu Polymer Co., Ltd.) was adopted. The peel charge amount and the like were measured at a measurement distance of 100 mm at a temperature of 23 ° C. using a static electricity measuring device (product name: model SK-H050) manufactured by Keyence Corporation.

[Example 2]
Basically, it was the same as the example, but the pressure-sensitive adhesive tape made of polytetrafluoroethylene resin was changed to AZFLON (registered trademark) tape (manufactured by AZONE Corporation: product name).

[Comparative example]
A packaging device similar to that of the example was used, but an adhesive tape made of polytetrafluoroethylene resin was not adhered to the peripheral surface of one of the most downstream clamping rollers. When the wrap film is pulled out to a tray size in an untreated state without using this polytetrafluoroethylene resin adhesive tape, the peel charge amount, temperature, and humidity when the wrap film is pulled out quickly and continuously are measured. The results are shown in Table 1.

  In Examples 1 and 2, unlike the comparative example, the adhesive tape made of polytetrafluoroethylene resin slidably in contact with the wrap film exhibited slipperiness, and a good peeling charge suppressing effect could be obtained. In particular, in the initial stage when the tray size was pulled out short, the first time when the wrap film was continuously pulled out quickly, an extremely good peeling charge suppressing effect could be obtained, and sufficient practicality was proved.

  The packaging device according to the present invention is used in the field of packaging foods, fruits and vegetables, garden supplies, and the like.

DESCRIPTION OF SYMBOLS 1 Food tray 10 Housing 12 Upper surface 13 1st lower surface 13A 2nd lower surface 14 Packaging work area | region 15 Outlet 17 Heat board (heating member)
20 Packaging roll body 21 Core 22 Wrap film (resin sheet)
30 roller group 31 support roller 31A one support roller 32 nipping roller 32A one nipping roller 33 roller core 34 elastomer layer 35 most downstream roller 40 cutting blade (cutting member)
50 Adhesive tape (polytetrafluoroethylene resin tape)
60 Storage area 61 Cover plate

Claims (6)

  A packaging roll body in which a resin sheet is wound around a core, a roller group that contacts the resin sheet of the packaging roll body, and a resin sheet that is provided downstream of the roller group and that is fed from the packaging roll body can be cut. A packaging device, comprising: a cutting member, wherein a charging suppression function for a resin sheet is imparted to the most downstream roller in the roller group.   The packaging roll body and the roller group include at least a housing containing the roller group, and the housing is formed with a discharge port for discharging the resin sheet fed from the most downstream roller of the roller group from the inside of the housing to the outside. The surface of the housing is divided into an upper surface and a lower surface, and a packaging work area is formed on one of the upper surface and the lower surface, and a heating member for the resin sheet is provided on the other The packaging device according to claim 1.   The roller group includes a plurality of rotatable support rollers that are supported by sandwiching the packaging roll body, and a plurality of rotatable sandwiching rollers that are arranged downstream of the plurality of support rollers and sandwich the resin sheet fed from the packaging roll body. The packaging device according to claim 1, wherein at least one of the plurality of sandwiching rollers is a most downstream roller.   The packaging apparatus according to claim 1, 2 or 3, wherein the most downstream roller has a charge suppressing function by affixing a tape made of polytetrafluoroethylene resin to the peripheral surface.   The most downstream roller includes a roller core and an elastic elastomer layer formed on the peripheral surface of the roller core, and a tape made of polytetrafluoroethylene resin is attached to the surface of the elastomer layer. The packaging device according to claim 1, 2 or 3 having a charge suppressing function.   The most downstream roller includes a roller core and an elastic elastomer layer formed on the peripheral surface of the roller core, and the elastomer layer is molded from a molding material containing polytetrafluoroethylene resin, thereby suppressing charging. The packaging device according to claim 1, 2 or 3, which has a function.

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