JP5965937B2 - Shrink wrapping equipment - Google Patents

Description

  The present invention relates to a shrink wrapping apparatus for fixing a heat-shrinkable wrapping body to a main body.

  2. Description of the Related Art Conventionally, a shrink wrapping device for fixing a heat-shrinkable wrapping body to a main body is known. For example, Patent Document 1 discloses a heating device in which a conveyor, a preheating unit, and a main heating unit are arranged on a frame.

  In the heating device of Patent Document 1, when the product is transferred from the upstream device to the conveyor of the heating device, the product is transported into the preheating unit, and the preliminary temperature is maintained until the temperature immediately before the shrink film starts to shrink. To be heated. A blower is disposed in the cover of the preheating unit with a conveyor interposed therebetween, and the product is conveyed between the two blowers. A supply pipe is connected to the upper part of the blower section, and an opening plate having a large number of openings is attached to the product-side surface of the blower section. When the air heated by the fan and the heater is supplied into the blower section through the supply pipe, hot air is sent from the opening of the opening plate toward the product (particularly, the shrink film).

  Thereafter, the product is conveyed from the preheating unit to the main heating unit by the conveyor, further heating is performed by the main heating unit, the shrink film shrinks, and the shrink film adheres to the side surface of the product. In the main heating section, air that forms a vortex around the shrink film of the product is guided downward from the side of the conveyor and taken into the fan.

Japanese Patent No. 3907436

  In the above heating device disclosed in Patent Document 1, since the preheating unit and the main heating unit are provided, only a fan and a heater for supplying warm air to the main heating unit are required. In addition, a fan and a heater for supplying warm air to the preheating unit are also required. Such a heating device may be suitable when a large-capacity power source (for example, 200 VAC) is assumed to be used, but when a small-capacity power source (for example, 100 VAC) is used, The capacity may be insufficient.

  An object of the present invention is to provide a shrink wrapping apparatus that can be operated using a small-capacity power source when the package is preheated and then the package is heated and shrunk and fixed to the main body. It is.

  The shrink wrapping apparatus of this invention is for heating the said package so that the package which heat-shrinks may be fixed to a main body (packaged body). The shrink wrapping device includes a transport mechanism for transporting the package body and the main body in a transport direction in order of a preheating position for preheating the package body and a main heating position for main heating the package body, and warm air at the main heating position. So that the package body can be preheated using the blower mechanism that jets the hot air and the hot air jetted to the main heating position, and the hot air that has been jetted to the main heating position and flows to the preheating position on the upstream side And a cover member for suppressing diffusion to the surroundings at the preheating position.

  In this configuration, the main heating of the packaging body is performed by the warm air blown from the air blowing mechanism to the main heating position, while the preheating of the packaging body is ejected from the air blowing mechanism to the main heating position and is upstream of that. This is done by the warm air that flows to the preheating position. That is, in this configuration, the power consumption is reduced as compared with the conventional case where a fan and a heater for supplying hot air for main heating and a fan and a heater for supplying warm air for preheating are provided. Can be reduced. In addition, in this configuration, a part of the warm air blown to the main heating position flows upstream, and the warm air is prevented from diffusing to the surroundings at the preheating position. The amount of heat for preheating can be secured. Therefore, the shrink wrapping apparatus having this configuration can preheat the package, and then heat the package to shrink it, thereby fixing the package to the main body and using a small-capacity power source. Can drive.

  In the shrink wrapping apparatus, it is preferable that the main heating position is provided on the downstream side of the location where the cover member is interrupted.

  When the warm air blown from the blower mechanism hits the package at the main heating position, the package is rapidly heated. Here, the package that undergoes heat shrinkage only needs to temporarily (instantly) reach a temperature higher than the temperature at which the heat shrinks. When the package is exposed to a high temperature atmosphere for a long time, an excessive amount of heat is applied to the package, and in some cases, defects (for example, defects such as holes in the package) may occur.

  On the other hand, in the present configuration in which the main heating position is provided on the downstream side of the place where the cover member is interrupted, the cover member is ejected to the main heating position and packaged as compared with the case where the cover member is also provided in the main heating position. Warm air that has contracted the body tends to spread around. Therefore, in this configuration, while the temperature of the packaging body is temporarily (instantly) raised by the warm air hitting the packaging body at the main heating position, it is possible to suppress the heat amount more than necessary from being applied to the packaging body. Therefore, it is possible to suppress the occurrence of the above problems in the package.

  The shrink wrapping apparatus preferably includes a guide member that guides the warm air blown to the main heating position to the inside of the cover member.

  In this configuration, since the guide member guides the warm air blown to the main heating position to the inside of the cover member, it becomes easier to ensure the amount of heat for preheating the package at the preheating position.

  In addition, as described above, when the main heating position is provided on the downstream side of the place where the cover member is interrupted, the warm air blown to the main heating position diffuses in all directions, so that it is more than the main heating position. The warm air flowing to the upstream preheating position may not necessarily increase. Even in such a case, in this configuration, since the guide member that guides the warm air blown to the main heating position to the inside of the cover member is provided, compared to the case where the guide member is not provided, The ratio of the warm air flowing to the preheating position in the warm air jetted from the blower mechanism to the main heating position can be increased. Thereby, a package can be pre-heated more efficiently.

  The said shrink packaging apparatus WHEREIN: The said ventilation mechanism may be comprised so that a warm air may be ejected to the said main heating position toward the direction inclined to the said preheating position side with respect to the plane orthogonal to the said conveyance direction. . Alternatively, the air blowing mechanism may be configured such that the direction in which the hot air is ejected is adjustable.

  When the direction of the hot air blown to the main heating position is inclined toward the preheating position as in this configuration, most of the hot air blown from the blower mechanism to the main heating position is used for the preheating position side. Can be shed. Thereby, a package can be preheated more efficiently. Further, in the case where the air blowing mechanism is configured so that the direction in which the hot air is ejected is adjustable, the air blowing mechanism can be adjusted from the air blowing mechanism by adjusting the direction in which the hot air is ejected from the air blowing mechanism to the preheating position side. Most of the warm air jetted to the heating position can be flowed to the preheating position side. Thereby, a package can be preheated more efficiently.

  In the shrink wrapping apparatus, a turbulent member that disturbs the flow of warm air in the cover member may be provided inside the cover member.

  In this configuration, since the flow of the warm air that is jetted to the main heating position and flows into the cover member is disturbed by the turbulent member in the cover member, the temperature can be made uniform in the cover member. The time during which hot air stays in the cover member can be extended. Thereby, the warm air which was ejected to the main heating position and flowed into the cover member can be used for preheating more efficiently.

  In the shrink wrapping apparatus, the transport mechanism includes a transport belt that moves in the order of the preheating position and the main heating position in a state where the package and the main body are placed, and the transport belt has a plurality of through holes. It is preferable to have it.

  In this configuration, since the transport belt has a large number of through holes, the warm air blown from the blower mechanism is passed through the through holes of the transport belt to the package body and the main body placed on the transport belt. It is also possible to hit. Specifically, in this configuration, warm air ejected from, for example, the lower side of the conveyor belt toward the conveyor belt passes through the through hole and hits the package body and the main body placed on the conveyor belt.

  In the shrink wrapping apparatus, the cover member has a tunnel-like shape that covers both sides and the upper side of the preheating position, and a lower portion of the preheating position is provided below the conveying belt in the preheating position. It is preferable that it is blocked by a closed member.

  In this configuration, even if the conveyor belt has a large number of through holes, a closing member is provided below the conveyor belt. Therefore, at the preheating position, both sides, upper and lower sides are closed with the cover member. It will be surrounded by the member. Thereby, since the spreading | diffusion of the warm air to both sides, the upper direction, and the downward direction is suppressed by the cover member and the obstruction | occlusion member in a preheating position, the calorie | heat amount which preheats a package body in a preheating position can be ensured more reliably.

  In the shrink wrapping apparatus, the air blowing mechanism includes a first jet port and a second jet port for jetting warm air to the main heating position, respectively, and the first jet port and the second jet port are the transport belt. It is preferable to face each other through a part.

  In this configuration, when the conveyor belt has a large number of through-holes, hot air is ejected from the first jet port and the second jet port facing each other via the conveyor belt to the main heating position. Thereby, compared with the case where a warm air is ejected only from one direction with respect to a package body, a warm air can be applied to a wider range of a package body.

  In the shrink wrapping apparatus, the transport belt is an endless belt having an annular path, the first jet port is disposed above the endless belt, and the second jet port is the end of the endless belt. It is preferably arranged inside the annular path.

  In this configuration, when warm air is jetted from the first jet port and the second jet port facing each other via the conveyor belt to the main heating position, the second jet port is disposed inside the annular path of the endless belt. Therefore, the warm air ejected from the second ejection port can be efficiently applied to the package on the conveyor belt. Specifically, it is as follows.

  For example, when the second ejection port is disposed below the endless belt and outside the annular path, two layers (double) are provided between the package on the conveyor belt and the second ejection port. The belt will intervene. In this case, the hot air ejected from the second ejection port needs to pass through the respective through holes of the two-layer belt in order to reach the package on the transport belt.

  On the other hand, in this configuration, since the second ejection port is disposed inside the annular path of the endless belt, only one layer of belt is interposed between the package on the conveyor belt and the second ejection port. It is. Therefore, in this structure, the warm air ejected from a 2nd jet nozzle can be efficiently applied to the package body on a conveyance belt.

  In the shrink wrapping apparatus, it is preferable that the air blowing mechanism includes a fan in which a fan and a heater are built in a housing and a jet port is provided at a front end portion of the housing.

  In this configuration, the fan and the heater have a compact structure built in the casing, and the fan and the jet outlet are located close to each other, so that hot air can be efficiently ejected with less power.

  In the shrink wrapping apparatus, the air blowing mechanism includes a first fan in which a first fan and a first heater are built in a first housing and the first air outlet is provided at a tip portion of the first housing; A second fan and a second heater may be built in the second casing, and a second blower having the second jet outlet at the tip of the second casing may be provided.

  In this configuration, each of the first blower and the second blower of the blower mechanism has a compact structure in which the fan and the heater are built in the housing, and the fan and the jet outlet are close to each other. Hot air can be ejected efficiently.

  According to the shrink wrapping apparatus of the present invention, after preheating a package that is thermally contracted, the package can be heated to be fixed to the main body, and can be operated using a small-capacity power source. .

It is a perspective view which shows the shrink wrapping apparatus which concerns on one Embodiment of this invention. It is a right view which shows the shrink wrapping apparatus of FIG. It is a left view which shows the shrink wrapping apparatus of FIG. It is a front view which shows the shrink wrapping apparatus of FIG. It is a top view which shows the shrink wrapping apparatus of FIG. It is a top view which shows the conveyance belt of the conveyance mechanism in the said shrink wrapping apparatus. In the said shrink wrapping apparatus, it is a left view which shows the state in which the direction of the warm air ejected from the air blower of a ventilation mechanism to this heating position inclines to the preheating position side. It is the VIII-VIII sectional view taken on the line in FIG. It is the IX-IX sectional view taken on the line in FIG. It is sectional drawing which shows the modification 1 of a shrink wrapping apparatus. It is a front view which shows the modification 2 of a shrink wrapping apparatus. It is a top view which shows the modification 2 of a shrink wrapping apparatus. It is a perspective view which shows the modification 3 of a shrink wrapping apparatus. It is a perspective view which shows the modification 4 of a shrink wrapping apparatus.

  Hereinafter, a shrink wrapping apparatus 1 according to an embodiment of the present invention will be described with reference to the drawings.

[Overall structure of shrink wrapping equipment]
FIG. 1 is a perspective view showing a shrink wrapping apparatus 1 according to an embodiment of the present invention. The shrink wrapping apparatus 1 according to this embodiment can preheat the wrapping body 5 and then heat and shrink the wrapping body 5, thereby bringing the wrapping body 5 into close contact with the main body 6. The shrink wrapping apparatus 1 can be operated using a small capacity power source (for example, 100 VAC).

  In the shrink wrapping apparatus 1, the preheating process and the main heating process of the wrapping body 5 are automatically performed, and the process of supplying the wrapping body 5 and the main body 6 to the shrink wrapping apparatus 1 is manually performed. Thus, although the shrink wrapping apparatus 1 of this embodiment is a semi-automatic apparatus, it is not restricted to this, It is comprised so that the process which supplies the package 5 and the main body 6 to the shrink wrapping apparatus 1 may also be performed automatically. May be.

  As the package 5 and the main body 6, various things can be targeted. The package 5 only needs to have heat shrinkability, and for example, various materials such as polyethylene, polypropylene, polyvinyl chloride, polystyrene, and polyester can be used. Below, although the specific example of fixing the label as the package 5 to the container as the main body 6 is given and demonstrated, the object of the package 5 and the main body 6 is not restricted to these.

  As shown in FIGS. 1 to 5, the shrink wrapping apparatus 1 according to this embodiment includes a transport mechanism 2, a blower mechanism 3, a cover member 4, and a frame 10.

  The frame 10 has a function of supporting the transport mechanism 2, the air blowing mechanism 3, the cover member 4, and the like. The frame 10 includes, for example, a pair of upper frames 101, a pair of lower frames 102, a plurality of side frames 103, a front panel 104, a back panel 105, and a blower support frame 106. Although the frame of a shape is comprised, it is not restricted to such a structure.

  The pair of upper frames 101 extend in the transport direction D1 of the package 5 and the main body 6, and are arranged at intervals in the width direction D2 (direction D2 orthogonal to the transport direction D1 and parallel to the horizontal direction). . The pair of lower frames 102 extend below the upper frame 101 in the transport direction D1 and are spaced apart from each other in the width direction D2.

  Each side frame 103 extends in the vertical direction. Of the plurality of side frames 103, two side frames 103 provided on the right side are fixed to the upper frame 101 on the right side and the lower frame 102 on the right side, and two side frames provided on the left side. 103 is fixed to the left upper frame 101 and the left lower frame 102.

  The front panel 104 is fixed to two side frames 103 provided on the upstream side in the transport direction D1. The back panel 105 is fixed to two side frames 103 provided on the downstream side in the transport direction D1. The front panel 104 includes a switch 201 for turning on / off the main power supply of the shrink wrapping apparatus 1, a switch 202 for turning on / off the conveyance mechanism 2, a speed adjustment knob 203 of the conveyance mechanism 2, and temperature adjustment of the heater 35 of the blower mechanism 3. A knob 204 or the like is provided. The temperature adjustment knob 204 can individually adjust the temperature of a heater 35 of the first blower 31 and a heater 35 of the second blower 32 described later.

[Transport mechanism]
The transport mechanism 2 has a function of transporting the package body 5 and the main body 6 in the transport direction D1 in the order of a preheating position P1 for preheating the package body 5 and a main heating position P2 for main heating the package body 5. As shown in FIGS. 1 to 5, the transport mechanism 2 includes a transport belt 20, a plurality of rollers that support the transport belt 20, and a transport motor (not shown) that drives at least one of the plurality of rollers.

  In the present embodiment, the conveyance belt 20 is an endless belt having an annular path. The conveyor belt 20 is supported by a plurality of upper rollers 21 and 22 and a plurality of lower rollers 23 and 24. As the conveyance motor rotates, at least one of the plurality of rollers 21 to 24 rotates, whereby the conveyance belt 20 rotates along an annular path.

  The upper roller 21 is disposed in the vicinity of the front panel 104 on the upstream side in the transport direction D1, and is rotatably supported by, for example, a pair of side frames 103. The upper roller 22 is disposed in the vicinity of the rear panel 105 on the downstream side in the transport direction D1, and is rotatably supported by, for example, the pair of side frames 103. In the present embodiment, the upper rollers 21 and 22 are disposed at the same height so that the transport path 20P through which the package 5 and the main body 6 are transported is horizontal, but the present invention is not limited to this, and different heights are provided. May be arranged.

  The lower roller 23 is disposed in the vicinity of the back panel 105 below the upper roller 22 and is rotatably supported by, for example, a pair of side frames 103. The lower roller 23 is attached to the frame 10 so as to be movable with respect to the frame 10 (specifically, the side frame 103). Specifically, the lower roller 23 has a tension adjusting mechanism 23a in one or both of the axial directions. The tension adjusting mechanism 23a is configured to adjust the tension of the transport belt 20 by moving the lower roller 23 with respect to the frame 10 (specifically, vertically moving). The shafts on both sides of the roller 23 are inserted through a long hole 103a provided in the side frame 103. The tension adjusting mechanism 23a includes a nut-like member attached to the end of the shaft of the roller 23, and And a screw member screwed to the member. By rotating this screw member, the roller 23 moves up and down, whereby the tension of the conveyor belt 20 can be adjusted.

  The lower roller 24 is disposed closer to the front panel 104 than the lower roller 23 and is rotatably supported by, for example, a pair of lower frames 102. The lower rollers 23 and 24 are disposed at a distance from the upper rollers 21 and 22 so that a second blower 32 described later can be disposed inside the annular path of the transport belt 20.

  A portion of the conveyance belt 20 supported by the pair of upper rollers 21 and 22 functions as a conveyance path 20 </ b> P that conveys the package 5 and the main body 6. In the present embodiment, the conveyance path 20P of the conveyance belt 20 is provided in a posture substantially parallel to the horizontal plane, but is not limited thereto, and may be inclined with respect to the horizontal plane.

  As shown in FIG. 6, in this embodiment, the conveyance belt 20 is a mesh belt having a large number of through holes 20a. The large number of through holes 20a are arranged in the conveying direction D1 and also in the width direction D2, and are arranged substantially uniformly over the entire conveying belt 20. In the present embodiment, each through hole 20a has a quadrangular shape, but is not limited thereto, and may be, for example, a circular shape. Moreover, although many through-holes 20a have the substantially same magnitude | size, it is not restricted to this.

[Blower mechanism]
The blower mechanism 3 has a function of ejecting warm air to the main heating position P2. As shown in FIGS. 1 to 5, in the present embodiment, the blower mechanism 3 includes a first blower 31 and a second blower 32. The 1st air blower 31 and the 2nd air blower 32 are arrange | positioned so that a warm air may be ejected toward the main heating position P2 from a mutually different direction. Specifically, the first blower 31 is disposed above the transport belt 20, and warm air is jetted downward toward the main heating position P <b> 2, and the second blower 32 is disposed inside the annular path of the transport belt 20. The hot air is jetted upward toward the main heating position P2.

  As shown in FIG. 2, the first blower 31 is supported by the blower support frame 106 via the first support member 107, and the second blower 32 is supported by the blower support frame 106 via the second support member 107. It is supported. The blower support frame 106 has an elongated shape extending in the vertical direction.

  The first blower 31 has an integrated compact structure in which a first fan 34 and a first heater 35 are built in a first housing 33. A first jet port 31a is provided at the distal end of the first housing 33, and a first suction port 31b is provided at the proximal end opposite to the distal end. The second blower 32 has an integrated compact structure in which the second fan 34 and the second heater 35 are built in the second casing 33, and a second jet is formed at the tip of the second casing 33. An outlet 32a is provided, and a second suction port 32b is provided at the proximal end opposite to the distal end. The first jet port 31a and the second jet port 32a are opposed to each other in the vertical direction via a conveyance path 20P that is a part of the conveyance belt 20.

  In each of the first blower 31 and the second blower 32, when the fan 34 is driven, the air sucked into the housing 33 from the suction ports 31b and 32b is heated by the heater 35, and from the jet ports 31a and 32a. It is spouted as warm air.

  In the present embodiment, in each of the first blower 31 and the second blower 32, the distal end portion of the housing 33 has a flat shape, and the ejection ports 31a and 32a have an elongated slit-like opening shape. ing. In this embodiment, although the longitudinal direction of the jet nozzles 31a and 32a has faced the width direction D2, it is not restricted to this. When the jet outlets 31a and 32a have a slit-like opening shape that is long in the width direction D2, the hot air can be jetted over a wide range in the width direction D2, and the jet speed of the hot air is increased. Can do.

  The 1st blower 31 and the 2nd blower 32 are comprised so that the position of an up-down direction can be adjusted. As shown in FIG. 2, the blower support frame 106 includes a rail portion 106 a provided along the longitudinal direction, and a fixing member 106 b that fixes each of the first support member 107 and the second support member 107 to the blower support frame 106. (For example, a screw). Each support member 107 is slidable in the vertical direction along the rail portion 106a when the fixed state by the fixing member 106b is released, and is fixed to the blower support frame 106 when it is fixed by the fixing member 106b. The Therefore, the first blower 31 and the second blower 32 can adjust the position in the vertical direction.

  Moreover, the 1st air blower 31 and the 2nd air blower 32 are comprised so that the jet direction of warm air can be adjusted. As shown in FIG. 3, each support member 107 includes an arc-shaped elongated hole 107 a and a fixing member 107 b (for example, a screw) that fixes the corresponding blowers 31 and 32 to the support member 107. Each blower 31, 32 is attached to the support member 107 so as to be rotatable about a fulcrum 107c. When the fixed state by the fixing member 107b is released, each of the blowers 31 and 32 can rotate along the long hole 107a within the range of the long hole 107a around the fulcrum 107c, and is fixed by the fixing member 107b. Then, it is fixed to the support member 107.

  For example, as shown in FIG. 7, the first blower 31 has a preheating position with respect to a plane P perpendicular to the transport direction D1 in the direction of warm air ejected from the ejection port 31a (the direction of the straight line L1 in FIG. 7). It can be adjusted in the direction inclined to the P1 side. Moreover, the 2nd air blower 32 is the direction which inclines the ejection direction of the warm air ejected from the ejection port 32a to the preheating position P1 side with respect to the plane P orthogonal to the conveyance direction D1, similarly to the 1st air blower 31. Can be adjusted. In the state shown in FIG. 3, the hot air blowing direction L <b> 1 ejected from the jet outlet 31 a of the first blower 31 is directed in a direction parallel to the plane P.

  In the present embodiment, since the first blower 31 and the second blower 32 are arranged on the downstream side of the distal end portion 4E2 of the cover member 4 described later, the angles of the first blower 31 and the second blower 32 are adjusted. The structure is easy to do.

[Cover member]
The cover member 4 has a function of suppressing the warm air blown from the blower mechanism 3 to the main heating position P2 and flowing to the upstream preheating position P1 from diffusing around at the preheating position P1. As shown in FIGS. 1 to 5, the cover member 4 is provided so as to cover a part of the conveyance path 20 </ b> P of the conveyance belt 20. The cover member 4 has a tunnel-like shape that closes both sides and the upper side of the preheating position P1. The cover member 4 has a base end portion 4E1 on the upstream side in the transport direction D1 and a front end portion 4E2 on the downstream side in the transport direction D1. The cover member 4 is interrupted at the distal end portion 4E2, and is not provided downstream of the distal end portion 4E2.

  As shown in FIGS. 1 and 8, in this embodiment, the cover member 4 has a pair of side wall portions 41 and 42 and an upper wall portion 43. Each of the side wall portions 41 and 42 has a shape extending in the transport direction D1. One side wall 41 (right side wall 41) closes the right side of the preheating position P1, and the other side wall 42 (left side wall 42) closes the left side of the preheating position P1. The upper wall portion 43 has a shape extending in the transport direction D1, and closes the upper side of the preheating position P1.

  The right side wall portion 41 is supported by the first frame 101 on the right side, and is provided in a posture that stands upward from the first frame 101. The left side wall portion 42 is supported by the first frame 101 on the left side, and is provided in a posture standing up from the first frame 101. The upper wall portion 43 connects the upper end of the side wall portion 41 and the upper end of the side wall portion 42.

  The upper wall portion 43 may be formed by a flat plate parallel to the horizontal plane, but in order to reduce the volume of the inner space of the cover member 4, for example, an arched shape, a bent shape, etc. Also good. Thus, when the volume of the inner space of the cover member 4 is reduced, the temperature of the inner space of the cover member 4 is easily raised by the warm air. In the present embodiment, the upper wall portion 43 has a bent shape as shown in FIGS. 1 and 8. That is, the upper wall portion 43 includes a central portion 43a extending in the transport direction D1 and parallel to the horizontal plane, and inclined portions 43b and 43c provided on both sides of the central portion 43a. The inclined parts 43b and 43c are inclined downward while extending outward from the central part 43a in the width direction D2. The lower ends of the inclined portions 43b and 43c are connected to the upper ends of the side wall portions 41 and 42, respectively.

  In the present embodiment, the cover member 4 is configured to be able to adjust the position of the transport direction D1 with respect to the frame 10. In other words, the cover member 4 is configured to be able to adjust the position of the transport direction D1 with respect to the transport belt 20 of the transport mechanism 2 and the blowers 31 and 32 of the blower mechanism 3.

  As shown in FIGS. 1 to 3, each first frame 101 includes a long hole 101 a extending in the transport direction D <b> 1 and a fixing member 101 b (for example, a screw) that fixes the side wall portions 41 and 42 of the cover member 4 to the first frame 101. ). When the fixed state by the fixing member 101b is released, the cover member 4 can be slid in the transport direction D1 along the long hole 101a within the range of the long hole 101a, and when the fixed state by the fixing member 101b, Fixed to the first frame 101.

  In the present embodiment, the cover member 4 is configured so that the position in the vertical direction with respect to the frame 10 can be adjusted. In other words, the cover member 4 is configured so that the height of the inner space of the cover member 4 can be adjusted.

  As shown in FIGS. 1-3, the side wall part 41 has the long hole 41a extended in an up-down direction, and the side wall part 42 has the long hole 42a extended in an up-down direction. The above-described fixing member 101b is engaged with the long holes 41a and 42a. When the fixed state by the fixing member 101b is released, the cover member 4 is slidable in the vertical direction along the long holes 41a and 42a within the range of the long holes 41a and 42a, and is fixed by the fixing member 101b. Then, it is fixed to the first frame 101.

[Guide member]
In the present embodiment, since the main heating position P2 is provided on the downstream side of the front end portion 4E2 of the cover member 4, the warm air blown to the main heating position P2 is likely to diffuse in all directions. Therefore, as shown in FIGS. 1 to 3, in this embodiment, the shrink wrapping apparatus 1 includes a pair of guide members 7. The pair of guide members 7 has a function of guiding the warm air blown to the main heating position P <b> 2 to the inside of the cover member 4. Thereby, compared with the case where the guide member 7 is not provided, the ratio of the warm air which flows into the preheating position P1 among the warm air ejected from the ventilation mechanism 3 to this heating position P2 can be increased.

  As shown in FIGS. 1 and 2, one guide member 7 (right guide member 7) is connected to the right side wall portion 41 of the cover member 4, and is conveyed from the front end portion 4 </ b> E <b> 2 of the right side wall portion 41. It extends in the direction D1. As shown in FIGS. 1 and 3, the other guide member 7 (left guide member 7) is connected to the left side wall portion 42 of the cover member 4, and the distal end portion 4 </ b> E <b> 2 of the left side wall portion 41. To the conveying direction D1. The region between the pair of guide members 7 and 7 is open at the top and is not blocked.

[Occlusion member]
As shown in FIGS. 5 and 8, in the present embodiment, the lower part of the preheating position P1 is closed by the closing member 9 provided below the conveying belt 20 at the preheating position P1. Thus, since the closing member 9 is provided below the conveying belt 20 having a large number of through holes 20a, both sides, upper and lower sides thereof are surrounded by the cover member 4 and the closing member 9 at the preheating position P1. It will be. Thereby, since the spreading | diffusion of the warm air to the both sides, upper direction, and the downward direction is suppressed by the cover member 4 and the closure member 9 in the preheating position P1, the amount of heat which preheats the package 5 in the preheating position P1 is ensured more reliably. be able to.

  In the present embodiment, the closing member 9 is a flat plate-like member provided in a region surrounded by a square with a broken line in FIG. The closing member 9 has the same width as the transport belt 20 (the same width as the cover member 4), and has the same length as the length of the cover member 4 in the transport direction D1. Not limited to. The closing member 9 may be smaller than the width and length of the cover member 4. The closing member 9 is fixed to the cover member 4 by, for example, a fixing member 101b, so that when the cover member 4 slides in the transport direction D1 as described above, the closing member 9 moves together with the cover member 4. Has been.

  The closing member 9 is provided below the cover member 4, but is not provided on the downstream side of the front end portion 4 </ b> E <b> 2 of the cover member 4. That is, the closing member 9 is not provided at the main heating position P2.

[Preheating position, main heating position]
As shown in FIGS. 1 to 5 and 8, in the present embodiment, the preheating position P <b> 1 is upstream of the main heating position P <b> 2 in the transport direction D <b> 1, and the transport path 20 </ b> P between the cover member 4 and the transport belt 20. It is an area surrounded by. The preheating position P1 has a length in the transport direction D1 and a length in the width direction D2 when the shrink wrapping apparatus 1 is viewed in plan as shown in FIG. 5, and covers from the transport path 20P as shown in FIG. It has a height to the inner surface of the member 4.

  As shown in FIG. 1 to FIG. 3 and FIG. 9, in the present embodiment, the main heating position P <b> 2 is a position where hot air blown from the blower mechanism 3 hits the package 5. The main heating position P <b> 2 is a position where the straight line and the package 5 intersect when a straight line is drawn from the blower mechanism 3 in the direction in which warm air is ejected from the blower mechanism 3. Specifically, as shown in FIGS. 2, 3, and 9, the main heating position P <b> 2 at which the hot air blown from the first blower 31 hits the package 5 is set at the first outlet 31 a of the first blower 31. It is on a straight line L1 passing through the center. Further, the main heating position P <b> 2 at which the hot air blown from the second blower 32 strikes the package 5 is on a straight line L <b> 2 passing through the center of the second jet port 32 a of the second blower 32.

  For example, when the direction of warm air ejected from the ejection port 31a is adjusted to the direction inclined to the preheating position P1 from the state shown in FIG. 3 to the state shown in FIG. 7, the main heating position P2 is inclined. Move to the preheating position P1 side by the amount.

  In the present embodiment, the main heating position P2 is located on the downstream side in the transport direction D1 from the position where the cover member 4 is interrupted (that is, the front end portion 4E2 of the cover member 4). The upper part of the main heating position P2 where hot air is ejected from the first blower 31 is open, and a cover such as the cover member 4 is not provided. Similarly, the lower part of the main heating position P <b> 2 where hot air is ejected from the second blower 32 is opened, and a cover such as the cover member 4 is not provided. In the present embodiment, the main heating position P2 is in the vicinity of the front end portion 4E2 of the cover member 4 so that the packaging body 5 is subjected to main heating immediately after the packaging body 5 and the main body 6 pass through the inner space of the cover member 4 ( It is provided immediately after leaving the tunnel by the cover member 4.

  In this embodiment, in any state of the state shown in FIG. 3 in which the ejection direction L1 is directed in a direction parallel to the plane P and the state shown in FIG. 7 in which the ejection direction L1 is inclined toward the preheating position P1. The position of the blowout port 31a of the blower 31 is located on the downstream side (that is, on the downstream side of the front end portion 4E2 of the cover member 4) in the transport direction D1, rather than where the cover member 4 is interrupted. Thereby, the warm air which was jetted to this heating position P2 and contracted the package 5 becomes easy to spread | diffuse around. Therefore, it is possible to suppress the amount of heat more than necessary from being applied to the package body 5 while temporarily (instantly) raising the temperature of the package body 5 by the warm air hitting the package body 5 at the main heating position P2. Can do.

[Operation]
Next, the operation of the shrink wrapping apparatus 1 will be described. When the main power supply of the shrink wrapping apparatus 1 is turned on and the operation of the transport mechanism 2 is started, the transport belt 20 starts to move along the annular path. When there are a plurality of objects (packaging body 5 and main body 6) to be packaged, the conveyor belt 20 is continuously operated. The speed of the conveyor belt 20 is adjusted as necessary.

  Moreover, while the ventilation of the 1st air blower 31 and the 2nd air blower 32 of the ventilation mechanism 3 is started, the temperature of the heater 35 is adjusted as needed. Moreover, the blowing direction of the warm air of the 1st air blower 31 and the 2nd air blower 32 is adjusted as needed. When there are a plurality of objects to be packaged (the package body 5 and the main body 6), the warm air is continuously ejected from the first blower 31 and the second blower 32.

  As shown in FIGS. 2 and 3, when warm air is blown out from the first outlet 31 a of the first blower 31 in the ejection direction L <b> 1 (direction of the straight line L <b> 1), a part of the warm air is guided to the guide member 7. And flows into the inside of the cover member 4. Since the warm air that has flowed in is prevented from diffusing to the surroundings by the cover member 4 and the closing member 9, the temperature of the inner space of the cover member 4 (ie, the preheating position P1) is increased.

  In this state, the main body 6 and the packaging body 5 temporarily attached to the main body 6 are placed around the upstream end of the conveyance path 20P of the conveyance belt 20. The placed package 5 and the main body 6 move on the conveyance path 20P of the conveyance belt 20 to the downstream side in the conveyance direction D1, and reach the inner space of the cover member 4 (that is, the preheating position P1). The package 5 and the main body 6 that have reached the preheating position P1 are preliminarily heated by the surrounding warm air while moving in the inner space of the cover member 4.

  And if the package 5 and the main body 6 further move in the conveyance direction D1 and come out of the cover member 4, the package 5 will reach the main heating position P2 immediately thereafter. In the main heating position P2, since the warm air ejected from the first outlet 31a of the first blower 31 and the warm air ejected from the second outlet 32a of the second blower 32 directly hit the packaging body 5, The temperature of the package 5 rapidly rises above the temperature at which heat shrinks. Thereby, the package 5 is thermally contracted instantaneously at the main heating position P <b> 2 and is fixed to the main body 6.

  At this time, since the conveyor belt 20 is continuously moved, the package 5 is thermally contracted and then moved to a position shifted from the main heating position P2 to the downstream side in the conveyance direction D1. Moreover, in this embodiment, since the cover is not provided downstream from the main heating position P2 and the main heating position P2, the package 5 is rapidly cooled by ambient air after being thermally contracted. Thereby, it can suppress that the excess heat is applied to the package 5. Hereinafter, the pre-heating and the main heating are performed in the same manner for the other package 5 and the main body 6.

  In addition, the shrink wrapping apparatus 1 can be operated using a small-capacity power source (for example, 100 VAC). Specific examples are as follows. The total power required for the blower mechanism 3 (the first blower 31 and the second blower 32) is set to, for example, 1400 W or less, and specifically set to, for example, about 1300 to 1400 W. Further, the power required for the transport mechanism 2 is set to 20 W or less, for example, and specifically set to about 10 to 20 W, for example. And the shrink wrapping apparatus 1 of this embodiment can be operated at 1500 W or less.

[Modification 1]
FIG. 10 is a cross-sectional view illustrating a first modification of the shrink wrapping apparatus 1. In the first modification, one or more turbulent flow members 8 are provided inside the cover member 4. In the specific example shown in FIG. 10, a plurality of turbulent members 8 are provided. The turbulent flow member 8 has a function of disturbing the flow of warm air in the cover member 4.

  In the first modification, the flow of the warm air that has been ejected to the main heating position P2 and has flowed into the cover member 4 is disturbed by the turbulent flow member 8 in the inner space of the cover member 4, so Uniformity can be achieved, and the time during which hot air stays in the inner space of the cover member 4 can be extended. Thereby, the warm air which was ejected to the main heating position P2 and flowed into the cover member 4 can be used for preheating more efficiently.

  In the specific example shown in FIG. 10, each turbulent flow member 8 is a plate-like member (baffle plate) attached to the inner surface of the cover member 4, but the structure of the turbulent flow member 8 is not limited to this. The turbulent flow member 8 may be configured by a blade, a valve, or the like that creates an air vortex in the inner space (in the tunnel) of the cover member 4.

[Modification 2]
FIG. 11 is a front view showing a second modification of the shrink wrapping apparatus 1, and FIG. 12 is a plan view showing a second modification of the shrink wrapping apparatus 1. As shown in FIGS. 11 and 12, the shrink wrapping apparatus 1 according to the second modification is different from the embodiment shown in FIGS. 1 to 5 in the arrangement of the first blower 31 and the second blower 32, and the others. Is the same as that of the embodiment shown in FIGS.

  In the second modification, the air blowing mechanism 3 is configured to apply hot air to the package body 5 from the side. Specifically, the first blower 31 and the second blower 32 are arranged on both sides of the conveyance path 20 </ b> P of the conveyance belt 20. The first blower 31 is disposed on the right side of the conveyance path 20P, and the second blower 32 is disposed on the left side of the conveyance path 20P.

  Also in the second modification, the main heating position P2 is provided on the downstream side of the place where the cover member 4 is interrupted (that is, the front end portion 4E2 of the cover member 4). The main heating position P <b> 2 is a position where the warm air blown from the blower mechanism 3 hits the package 5. Specifically, as shown in FIGS. 11 and 12, the main heating position P <b> 2 where the hot air blown from the first blower 31 hits the package 5 passes through the center of the first jet outlet 31 a of the first blower 31. It is on the straight line L1. Further, the main heating position P <b> 2 at which the hot air blown from the second blower 32 strikes the package 5 is on a straight line L <b> 2 passing through the center of the second jet port 32 a of the second blower 32.

  The upper part of the main heating position P <b> 2 where hot air is ejected from the first blower 31 and the second blower 32 is opened, and a cover like the cover member 4 is not provided. The main heating position P2 is located near the front end 4E2 of the cover member 4 (tunnel by the cover member 4) so that the packaging body 5 is heated immediately after the packaging body 5 and the main body 6 pass through the inner space of the cover member 4. It is provided immediately after leaving.

  In the second modification, the pair of guide members 7 are provided at positions that do not interfere with the warm air blown from the first blower 31 and the second blower 32 reaching the main heating position P2. In the modification 2 shown in FIG.11 and FIG.12, the guide member 7 is provided in right and left similarly to embodiment shown in FIGS. That is, one guide member 7 (right guide member 7) is connected to the front end 4E2 of the right side wall 41 of the cover member 4 and extends in the transport direction D1 therefrom, and the other guide member 7 ( The left guide member 7) is connected to the front end portion 4E2 of the left side wall portion 42 of the cover member 4 and extends in the transport direction D1 therefrom, but is not limited thereto. In the modified example 2, the guide member 7 is not provided on the left and right, but may be provided on the upper and lower sides, for example. Specifically, for example, one guide member 7 (upper guide member 7) is connected to the front end portion 4E2 of the upper wall portion 43 of the cover member 4 and extends in the transport direction D1 therefrom, and the other guide member 7 is connected. The (lower guide member 7) may be provided at a position below the upper guide member 7 and opposed to the upper guide member 7 in the vertical direction. For example, the lower guide member 7 may be connected to the downstream end of the closing member 9 and extend in the transport direction D1 therefrom.

[Modification 3]
FIG. 13 is a cross-sectional view illustrating Modification 3 of the shrink wrapping apparatus 1. This modification 3 is different from the embodiment shown in FIGS. 1 to 5 in that a cover member is also provided at the main heating position P2, and other configurations are the same as those shown in FIGS. The form is the same.

  In Modification 3 shown in FIG. 13, the cover member 4 has a base end portion 4E1 on the upstream side in the transport direction D1 and a tip end portion 4E2 on the downstream side in the transport direction D1, and the main heating position P2 is the cover member. 4 on the upstream side of the tip 4E2. The cover member 4 has the insertion port 4a for inserting the front-end | tip part of the 1st air blower 31 in which the 1st jet nozzle 31a was provided in the position corresponding to this heating position P2. The insertion port 4 a is a hole that is the same size as the tip of the first blower 31 or slightly larger than the tip of the first blower 31.

  However, in the third modification shown in FIG. 13, the hot air jetted from the main heating position P <b> 2 from the blower mechanism 3 is less likely to diffuse around as compared with the embodiment shown in FIGS. 1 to 5. In some cases, the package 5 is exposed to a high temperature atmosphere for a long time, and an excessive amount of heat is applied to the package 5.

[Summary of Embodiment]
In the present embodiment, the main heating of the package 5 is performed by the warm air blown from the blower mechanism 3 to the main heating position P2, while the preheating of the package 5 is jetted from the blower mechanism 3 to the main heating position P2. This is done by the warm air that has flowed to the upstream preheating position P1. That is, in this embodiment, the warm air used for the main heating is also used for the preheating. Therefore, the fan and heater for supplying the warm air for the main heating and the warm air for the preheating are supplied as in the past. Power consumption can be reduced as compared with the case where a fan and a heater are provided. In addition, in the present embodiment, since the cover member 4 suppresses that a part of the warm air jetted to the main heating position P2 flows upstream, and the warm air diffuses around in the preheating position P1, the preheating is performed. The amount of heat for preheating the package 5 at the position P1 can be secured. Therefore, the shrink wrapping apparatus 1 of this configuration can preheat the package 5 and then shrink the package 5 by main heating, thereby fixing the package 5 to the main body 6. It can be operated with a capacity power supply.

  In the shrink wrapping apparatus 1, the main heating position P <b> 2 is preferably provided on the downstream side of the place where the cover member 4 is interrupted. When the warm air blown from the blower mechanism 3 hits the package 5 at the main heating position P2, the package 5 is rapidly heated. Here, the package 5 that undergoes heat shrinkage only needs to temporarily (instantly) reach a temperature higher than the temperature at which the heat shrinkage occurs. When the package 5 is exposed to a high-temperature atmosphere for a long time, an excessive amount of heat is applied to the package 5 and a defect (for example, a defect such as a hole in the package 5) may occur in some cases. is there. On the other hand, in the configuration in which the main heating position P2 is provided on the downstream side of the place where the cover member 4 is interrupted, compared to the case where the cover member 4 is also provided in the main heating position P2, the main heating position P2 is located. The hot air that is blown out and contracts the package 5 is likely to diffuse around. Therefore, in this configuration, an amount of heat more than necessary is applied to the package 5 while the temperature of the package 5 is temporarily (instantly) raised by the warm air that strikes the package 5 at the main heating position P2. Therefore, it is possible to suppress the occurrence of the above problems in the package 5.

  The shrink wrapping apparatus 1 preferably includes a guide member 7 that guides the warm air blown to the main heating position P <b> 2 to the inside of the cover member 4. In this configuration, compared to the case where the guide member 7 is not provided, it is possible to increase the ratio of the warm air flowing from the blower mechanism 3 to the preheating position P1 among the warm air ejected from the blower mechanism 3 to the main heating position P2. Thereby, the package 5 can be preheated more efficiently.

  In the shrink wrapping apparatus 1, the blower mechanism 3 may be configured to eject warm air toward the main heating position P <b> 2 in a direction inclined toward the preheating position P <b> 1 with respect to a plane orthogonal to the transport direction. Or the ventilation mechanism 3 may be comprised so that adjustment of the direction which ejects warm air is possible. When the direction of the hot air ejected to the main heating position P2 is a direction inclined toward the preheating position P1 as in this configuration, most of the hot air ejected from the blower mechanism 3 to the main heating position P2 Can flow to the preheating position P1 side. Thereby, the package 5 can be preheated more efficiently. In addition, when the blowing mechanism 3 is configured so that the direction in which the warm air is ejected is adjustable, the blowing mechanism is adjusted by adjusting the ejection direction of the warm air ejected from the blowing mechanism 3 to the preheating position P1 side. Most of the hot air jetted from 3 to the main heating position P2 can be flowed to the preheating position P1 side. Thereby, the package 5 can be preheated more efficiently.

  In the shrink wrapping apparatus 1, a turbulent flow member 8 that disturbs the flow of warm air in the cover member 4 may be provided inside the cover member 4. In this configuration, since the flow of the warm air that is jetted to the main heating position P2 and flows into the cover member 4 is disturbed by the turbulent member in the cover member 4, the temperature in the cover member 4 is made uniform. In addition, the time during which the hot air stays in the cover member 4 can be extended. Thereby, the warm air which was ejected to the main heating position P2 and flowed into the cover member 4 can be used for preheating more efficiently.

  In the shrink wrapping apparatus 1, the transport mechanism includes a transport belt 20 that moves in the order of the preheating position P <b> 1 and the main heating position P <b> 2 in a state where the package body 5 and the main body 6 are placed, and the transport belt 20 has a large number of through holes 20 a. It is preferable to have. In this configuration, since the transport belt 20 has a large number of through holes, the warm air blown from the blower mechanism 3 passes through the through holes of the transport belt 20 and is placed on the transport belt 20. It can also be applied to the body 5 and the body 6. For example, in this configuration, the warm air blown from the lower side of the conveyor belt 20 toward the conveyor belt 20 hits the package 5 and the main body 6 placed on the conveyor belt 20 through the through holes.

  In the shrink wrapping apparatus 1, the cover member 4 has a tunnel-like shape that closes both sides and the upper side of the preheating position P1, and the lower side of the preheating position P1 is provided below the conveying belt 20 at the preheating position P1. It is preferable that the closed member 9 is closed. In this configuration, even if the conveying belt 20 has a large number of through holes 20a, the closing member 9 is provided below the conveying belt 20, and therefore, at the preheating position P1, its both sides, above and below Is surrounded by the cover member 4 and the closing member 9. Thereby, since the spreading | diffusion of the warm air to the both sides, upper direction, and the downward direction is suppressed by the cover member 4 and the closure member 9 in the preheating position P1, the amount of heat which preheats the package 5 in the preheating position P1 is ensured more reliably. be able to.

  In the shrink wrapping apparatus 1, the blower mechanism 3 includes a first jet port 31a and a second jet port 32a that jet hot air to the main heating position P2, respectively, and the first jet port 31a and the second jet port 32a are transported. It is preferable that they face each other through a part of the belt 20. In this configuration, when the transport belt 20 has a large number of through holes 20a, the first heating port 31a and the second spray port 32a facing each other through the transport belt 20 are heated to the main heating position P2. Wind blows out. Thereby, compared with the case where a warm air is ejected only from one direction with respect to the package 5, a warm air can be applied to the package 5 more widely.

  In the shrink wrapping apparatus 1, the conveyance belt 20 is an endless belt having an annular path, the first ejection port 31 a is disposed above the endless belt, and the second ejection port 32 a is an annular path of the endless belt. It is preferable that it is arranged inside. In this configuration, when the warm air is jetted from the first jet port 31a and the second jet port 32a facing each other via the conveyor belt 20 to the main heating position P2, the second jet port 32a is an endless belt ring. Since it is arrange | positioned inside the path | route, the warm air blown from the 2nd jet nozzle 32a can be efficiently applied to the package 5 on the conveyance belt 20. FIG.

  In the shrink wrapping apparatus 1, the air blowing mechanism 3 includes a first fan 34 and a first heater 35 contained in the first housing 33 and a first jet port 31 a at the tip of the first housing 33. A first blower 31 and a second blower 32 in which a second fan 34 and a second heater 35 are built in a second housing 33 and a second outlet 32 a is provided at the tip of the second housing 33. It is preferable to provide. In this configuration, each of the first blower 31 and the second blower 32 of the blower mechanism 3 has the fan 34 and the heater 35 built in the housing 33, and the outlets 31 a and 32 a are provided at the tip of the housing 33. It is the structure which has. As described above, the fan 34 and the heater 35 have a compact structure in which the housing 33 is built in, and the fan 34 and the outlets 31a and 32a are close to each other, so that hot air is efficiently ejected with less power. be able to.

[Other variations]
As mentioned above, although embodiment of this invention was described, this invention is not limited to these embodiment, A various change, improvement, etc. are possible in the range which does not deviate from the meaning.

  For example, in the embodiment, the case where the guide member 7 is provided has been described as an example, but the guide member 7 can be omitted.

  In the above-described embodiment, the case where the conveyance belt 20 has a large number of through holes 20a has been described as an example. However, the conveyance belt 20 may not have the through holes 20a.

  In the above-described embodiment, the case where the lower portion of the preheating position P1 is blocked by the closing member 9 provided below the conveying belt 20 has been described as an example. However, the closing member 9 may be omitted.

  In the above-described embodiment, the case where the blower mechanism 3 includes an integrated blower in which the fan 34 and the heater 35 are incorporated in the housing 33 has been described as an example. However, the fan 34 and the heater 35 are different from each other. It may be built in the housing.

  In the embodiment, the case where the two blowers 31 and 32 are provided is illustrated, but for example, four blowers may be provided, and the configuration may be such that warm air is ejected from the upper, lower, left, and right directions to the package 5. Further, when the package 5 is small, only one blower 31 may be provided.

  In the above embodiment, the case where the air blowing mechanism 3 is configured to be adjustable in the direction in which the hot air is ejected is described as an example, but the direction in which the hot air is ejected from the air blowing mechanism 3 is not adjustable and is fixed. May be. In this case, for example, the blower mechanism 3 may be fixed so that warm air is ejected to the main heating position P2 in a direction inclined toward the preheating position P1 with respect to the plane P orthogonal to the transport direction D1. Further, the blower mechanism 3 may be fixed so as to eject the warm air to the main heating position P2 in a direction parallel to the plane P orthogonal to the transport direction D1.

  In addition, a funnel-shaped curtain may be attached to the upstream side of the cover member 4, for example. By attaching such a curtain to the upstream side of the cover member 4, the time during which the warm air stays in the cover member 4 can be further extended. Thereby, the warm air which was ejected to the main heating position P2 and flowed into the cover member 4 can be used for preheating more efficiently. In addition, although the said curtain can illustrate the form attached to base end part 4E1 in the state which hangs down from base end part 4E1 of the upstream of cover member 4, for example, it is not restricted to this.

  In the embodiment shown in FIGS. 1 to 3, the case where the guide member 7 is connected to the distal end portion 4E2 of the side wall portion 41 and extends in the conveyance direction D1 is illustrated, but the present invention is not limited thereto. For example, as in Modification 4 shown in FIG. 14, the guide member 7 is connected to a tip portion 4E2 of a part of the upper wall portion 43 (in the illustrated example, the inclined portions 43b and 43c of the upper wall portion 43), and from there, the conveying direction The form may extend to D1. That is, in the modification 4 shown in FIG. 14, the guide member 7 is connected to the front end part 4E2 of the side wall part 41 and the front end part 4E2 of a part of the upper wall part 43, and extends from there in the transport direction D1. However, also in this modification 4, the area | region between a pair of guide members 7 and 7 is opened upwards, and is not obstruct | occluded.

DESCRIPTION OF SYMBOLS 1 Shrink packaging apparatus 2 Conveyance mechanism 3 Air blow mechanism 4 Cover member 5 Packaging body 6 Main body 7 Guide member 8 Turbulence member 9 Closure member 20 Conveyance belt 20a Through-hole 31 1st blower 31a 1st blower 32 2nd blower 32a 2nd Spout 33 Housing 34 Fan 35 Heater P1 Preheating position P2 Main heating position

Claims (9)

A shrink wrapping apparatus that heats the package so that the package that heat shrinks is fixed to the body,
A transport mechanism for transporting the package body and the main body in the transport direction in the order of a preheating position for preheating the package body and a main heating position for main heating the package body;
A blower mechanism for blowing warm air to the main heating position;
Wherein to allow preheating the package by using the warm air ejected to the heating position, around the warm air flowing in the preheating position upstream is injected into the main heating position at the preheating position and a suppressing cover member from diffusing into,
The main heating position is a shrink wrapping apparatus provided on the downstream side of the place where the cover member is interrupted . The shrink wrapping device according to claim 1, wherein the blower mechanism includes a blower in which a fan and a heater are built in a housing and has a spout at a tip portion . A shrink wrapping apparatus that heats the package so that the package that heat shrinks is fixed to the body,
A transport mechanism for transporting the package body and the main body in the transport direction in the order of a preheating position for preheating the package body and a main heating position for main heating the package body;
A blower mechanism for blowing warm air to the main heating position;
The warm air that has been ejected to the main heating position and has flowed to the preheating position on the upstream side is surrounded at the preheating position so that the package can be preheated using the warm air that has been ejected to the main heating position. A cover member that suppresses diffusion to
And a guide member for guiding the warm air ejected to the main heating positioned inside the cover member
Shrink wrapping device. A shrink wrapping apparatus that heats the package so that the package that heat shrinks is fixed to the body,
A transport mechanism for transporting the package body and the main body in the transport direction in the order of a preheating position for preheating the package body and a main heating position for main heating the package body;
A blower mechanism for blowing warm air to the main heating position;
The warm air that has been ejected to the main heating position and has flowed to the preheating position on the upstream side is surrounded at the preheating position so that the package can be preheated using the warm air that has been ejected to the main heating position. A cover member that suppresses diffusion to
The air blowing mechanism is configured the warm air toward a direction inclined to the preheating position side with respect to a plane perpendicular to the conveying direction to eject the main heating position, or the hot air The jetting direction is adjustable .
Shrink wrapping device. A shrink wrapping apparatus that heats the package so that the package that heat shrinks is fixed to the body,
A transport mechanism for transporting the package body and the main body in the transport direction in the order of a preheating position for preheating the package body and a main heating position for main heating the package body;
A blower mechanism for blowing warm air to the main heating position;
The warm air that has been ejected to the main heating position and has flowed to the preheating position on the upstream side is surrounded at the preheating position so that the package can be preheated using the warm air that has been ejected to the main heating position. A cover member that suppresses diffusion to
Inside of the cover member, turbulence member for disturbing the flow of the hot air in the cover member is provided
Shrink wrapping device. A shrink wrapping apparatus that heats the package so that the package that heat shrinks is fixed to the body,
A transport mechanism for transporting the package body and the main body in the transport direction in the order of a preheating position for preheating the package body and a main heating position for main heating the package body;
A blower mechanism for blowing warm air to the main heating position;
In order to preheat the package using the hot air blown to the main heating position, the hot air that has been blown to the main heating position and has flowed to the preheating position on the upstream side is surrounded by the preheating position. A cover member for suppressing diffusion,
The transport mechanism includes a transport belt that moves in the order of the preheating position and the main heating position in a state where the packaging body and the main body are placed.
The conveyor belt have a large number of through-holes,
The cover member has a tunnel-like shape that closes both sides and the upper side of the preheating position,
The lower part of the preheating position is blocked by a closing member provided below the conveying belt in the preheating position.
Shrink wrapping device. The blower mechanism includes a first jet port and a second jet port that jet hot air to the main heating position, respectively.
The shrink packaging apparatus according to claim 6, wherein the first jet port and the second jet port are opposed to each other through a part of the transport belt . The air blowing mechanism is
A first fan and a first heater are housed in the first housing and the first blower having the first jet outlet at the tip, and a second fan and a second heater are housed in the second housing. And a second blower having the second jet outlet at the tip.
The shrink wrapping apparatus according to claim 7 . The conveyor belt is an endless belt having an annular path,
The first jet outlet is disposed above the endless belt,
The second jet nozzle is disposed inside the annular path of the endless belt.
The shrink wrapping apparatus according to claim 7 or 8 .

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