JP6550483B1 - Label heating device - Google Patents

Abstract

A label heating apparatus having a structure capable of maintaining the orientation of a label with respect to an attached object before and after heating when the label covered with the attached object is heated, and having a structure in which a bias of contraction of the label hardly occurs during heating. I will provide a. SOLUTION: A plurality of discharge parts 43 arranged so as to surround an object to be mounted are provided, and high-temperature gas discharged from adjacent discharge parts is joined before the label covered with the object to be mounted. Configure. [Selection] Figure 5

Description

  The present invention relates to label heating devices.

  Conventionally, a thermally shrinkable label (so-called shrink label) has been used as a decoration of a mounting object such as a plastic bottle, and the mounting object in the state where the label is formed larger than the outer diameter of the mounting object In this state, the label is brought into close contact with the outer surface of the object by heat contraction by the label heating device.

  Then, as the label heating device, for example, as shown in Patent Document 1, three or more discharge units are arranged at a heating position so as to surround a reference line facing a predetermined direction, and a direction from each discharge unit to the reference line There is disclosed a configuration in which hot air vortices are generated in the heating area by discharging the hot air in a direction inclined to the same side with respect to the above.

  By the way, in recent years, as objects to be mounted, for example, those having directions such as those having different front and rear, left and right areas in the outer peripheral surface on which a label is mounted are increasing, and objects to be mounted having such directions In many cases, the orientation of the label attached to the object with respect to the object is determined.

  However, when trying to heat the label coated on the load by the label heating device, the vortex of the hot air rotates the label relative to the load before the label on the load starts shrinking. As a result, there is a problem that the orientation of the label with respect to the mounting object can not be kept constant before and after heating.

JP 2003-81219 A

  Therefore, according to the present invention, when heating the label coated on the mounting object, the orientation of the label with respect to the mounting object can be maintained before and after heating, and the shrinkage of the label is less likely to occur during heating. It is a main object to provide a label heating device.

  That is, the label heating device according to the present invention is a label heating device for heating the label and attaching it to the object by blowing a high temperature gas onto the label coated on the object. It comprises a plurality of discharge parts arranged so as to surround the object to be mounted, and is configured such that the high temperature gas discharged from the adjacent discharge parts merges in front of the label coated on the object to be mounted It is characterized by being.

  In such a case, since the high temperature gas discharged from the adjacent discharge part is merged before being sprayed to the label coated on the mounting object, the merged gas is along the outer surface of the mounting object. The bifurcated bifurcated flow makes it difficult for the rotating force to act on the label, and makes it possible to suppress the deviation of the orientation of the label relative to the workpiece before and after heating.

  Note that the high-temperature gas discharged from the adjacent discharge parts is located in a virtual region sandwiched by the distant points of the virtual lines extending from the discharge parts to pass through the merge point. It may be configured to be sprayed on a label coated on the object to be mounted.

  With such a thing, the wind power difference (air volume difference) of the high temperature gas discharged from the adjacent discharge part becomes small, and the merged gas is divided into two branches substantially equally along the outer surface of the mounting object Flow, which makes it more difficult for the rotating force to act on the label.

  In addition, there are two or more sets of adjacent discharge parts, and the high-temperature gas discharged from the adjacent discharge parts of each set is positioned within the overlapping area where the virtual areas of the sets overlap. It may be configured to be sprayed on a label coated on an object.

  In such a case, the high-temperature gas discharged from the adjacent discharge parts of each set merges once, merges again, and then is sprayed onto the label coated on the mounting object, so that the high-temperature gas However, since the entire article to be mounted is uniformly wrapped, the entire label coated on the article to be shrunk substantially uniformly without deviation.

  Further, the set of the adjacent discharge units may be disposed to face each other across the object to be mounted, and further comprising a transport mechanism for transporting the object to be mounted, The set of adjacent discharge units may be arranged to face each other across the transport path of the transport mechanism.

  If it is such a thing, high temperature gas will be sprayed from two places which oppose with respect to a mounting object, and the bias | inclination of shrinkage | contraction of the label coat | covered by a mounting object can be suppressed.

  The set of the adjacent discharge units may be configured to be movable in the advancing and retracting direction with respect to the mounted object.

  If it is such a thing, the position of the confluence | merging point which the high temperature gas discharged from the discharge thing which adjoins to a mounting thing merges can be adjusted, and, thereby, the size of a mounting thing changes In this case, the position of the junction can be adjusted to the optimum position.

  According to the present invention, when heating a label coated on a mounting object, the orientation of the label with respect to the mounting object can be maintained before and after heating, and the deviation of the contraction of the label can be suppressed during heating.

It is a schematic diagram which shows the whole structure of the label heating apparatus of this embodiment. It is a schematic diagram which shows the internal structure of the label heating apparatus of this embodiment. It is a schematic diagram which shows the structure of the preheating heating mechanism of this embodiment. It is a schematic diagram which shows the structure of the main heating mechanism of this embodiment. It is a schematic diagram which shows the structure of the inner side wall located in one side with respect to the conveyance path of the 2nd housing | casing of this embodiment. It is a schematic diagram which shows the flow of the high temperature gas discharged from each discharge part of this embodiment. It is a schematic diagram which shows the structure of the inner side wall located in one side with respect to the conveyance path of the 2nd housing | casing of this embodiment. It is a schematic diagram which shows the flow of the high temperature gas discharged from each discharge part of this embodiment. It is a schematic diagram which shows the structure of the inner side wall located in one side with respect to the conveyance path of the 2nd housing | casing of other embodiment.

  Below, the label heating apparatus which concerns on this invention is demonstrated based on drawing.

  The label heating device 100 according to the present invention heats the heat-shrinkable label L by blowing a high-temperature gas onto the heat-shrinkable label L (so-called shrink label) coated on the object to be mounted X. It is used to adhere to the outer surface. In addition, the to-be-mounted object X should just be a thing which does not deform | transform by the heating by the label heating apparatus 100, for example, is containers made of glass, resin, metal, etc., Specifically, it is a plastic bottle.

  First Embodiment As shown in FIG. 1, the label heating device 100 according to the present embodiment is directed to the transport mechanism 10 for transporting the mounted object X covered with the label L, and the transport direction of the transport mechanism 10. A preheating mechanism 20 installed on the upstream side and a main heating mechanism 30 installed on the downstream side with respect to the transport direction of the transport mechanism 10 are provided.

  The transport mechanism 10 is a so-called belt conveyor. Specifically, the transport mechanism 10 includes an endless belt 11 on which the object X covered with the label L is placed, and a drive mechanism 12 for driving the endless belt 11. Therefore, the surface facing the upper side of the endless belt 11 is the conveyance path R. For example, a motor can be used as the drive mechanism 12.

  The preheating mechanism 20, as shown in FIGS. 2 and 3, has a tunnel-like preheating chamber 2S through which the transport path R passes, and an object to be mounted which passes through the transport path R and passes through the preheating chamber 2S. It serves to preheat the label L coated on X. Specifically, the preheating mechanism 20 is a downward U-shaped first casing 21 disposed so as to straddle the conveyance path R, and a gas blown from inside the first casing 21 to the preheating chamber 2S. And a first gas heating mechanism 22 for heating the air.

  In the first casing 21, a plurality of air outlets 21 h are formed in both inner side walls 211 opposed to each other across the transport path R, in other words, both inner side walls 211 constituting the preheating chamber 2S. The plurality of air outlets 21 h are arranged on each of the inner side walls 211 in the vertical and horizontal directions (grid).

  The first gas heating mechanism 22 is an inside of the first housing 21 and an upper wall 212 facing the transport path R, in other words, a plurality of heaters 221 installed on the upper wall 212 constituting the preheating chamber 2S. And a duct 222 which is guided from the outside to the inside of the first housing 21 and directs the opening on the one end side extending to the inside of the first housing 21 to the plurality of heaters 221. A pressure feeding mechanism (not shown) for feeding out air is connected to the other end side of the duct 222 extending to the outside of the first housing 21. As the plurality of heaters 221, for example, those in which cartridge heaters or the like with fins are disposed in a zigzag shape may be used.

  With such a configuration, the preheating mechanism 20 guides the gas (air) sent out by the pumping mechanism to the inside of the first housing 21 by the duct 222, passes the gas through the gaps of the plurality of heaters 221, and heats it. After that, the air is blown to the preheating chamber 2S from the plurality of air outlets 21h.

  The main heating mechanism 30, as shown in FIGS. 2 and 4, has a tunnel-like main heating chamber 3S through which the transport path R passes, and an object to be mounted which passes through the main path 3S through the transport path R. It plays a role of shrinking the label L coated on X and heating it to be in close contact with the article X. Specifically, the main heating mechanism 30 is a downward U-shaped second housing 31 disposed so as to straddle the conveyance path R, and a gas blown from inside the second housing 31 to the main heating chamber 3S. And a second gas heating mechanism 32 for heating the air. Incidentally, the first casing 21 and the second casing 31 are disposed close to each other so that the preliminary heating chamber 2S and the main heating chamber 3S communicate with each other to form one tunnel.

  In the second housing 31, air blowing covers 40 are provided on both inner side walls 311 opposed to each other across the transport path R, in other words, both inner side walls 311 constituting the main heating chamber 3S. Hereinafter, the configuration of the inner side wall 311 in the second housing 31 will be described based on FIG. Although FIG. 5 shows only the configuration of the inner side wall 311 located on one side in the second housing 31, the inner side wall 311 located on the other side also has the same configuration.

  The blower cover 40 is attached via a moving mechanism 50 so as to close an opening 311 h formed in the inner side wall 311. Thereby, the blower cover 40 is attached to the object X '(the object X to which the label L in this embodiment is covered) disposed at the predetermined main heat treatment position set in the main heating chamber 3S. It is possible to move in the direction of

  Specifically, the blower cover 40 includes a blower panel 41 having a size that closes the opening 311 h formed in the inner side wall 311, and a slide frame 42 rising from the outer edge of the blower panel 41. Then, the blower cover 40 has the slide frame 42 externally fitted on the outside of the guide frame 51 that rises from the opening 311 h formed in the inner side wall 311 toward the outside (the main heating chamber 3S side) of the second housing 31. It is attached so that it can cover. Thereby, the blower cover 40 slides relative to the guide frame 51, and the blower panel 41 can be moved in the forward and backward directions with respect to the object X '. The blower cover 40 is screwed through the screw 52 inserted into the slide frame 42 through the long hole 51 h formed in the guide frame 51, whereby the sliding distance of the blower cover 40 is determined by the long hole 51 h. It is regulated. In the present embodiment, the guide frame 51, the screw 52 and the long hole 51h constitute the moving mechanism 50. The moving mechanism 50 is not limited to such a configuration as long as it can move the discharge ports 43 in the advancing and retreating direction with respect to the object X ′.

  Moreover, the said ventilation panel 41 is formed in concave shape in the surface which faces the main heating chamber 3S side (conveyance path side). Specifically, the concave surface of the blower panel 41 is a first surface 411 parallel to the conveyance direction, and a first surface 411 bent from the side end on the upstream side with respect to the conveyance direction to the conveyance path R side It has two surfaces 412 and a third surface 413 bent from the side end on the downstream side to the conveyance direction of the first surface 411 toward the conveyance path R side, and the discharge part 43 is provided on each surface It is done. In the present embodiment, two discharge units 43 are provided on the first surface 411, and one discharge unit 43 is provided on the second surface 412 and the third surface 413, respectively.

  Each of the discharge parts 43 includes a pair of air guide plates 431 for guiding the gas sent out from a vent 41 h extending in a direction orthogonal to the conveyance direction formed in the blower panel 41. Note that the pair of air guide plates 431 stand from both sides of the air vent 43h formed in the air blowing panel 43, and are installed facing each other so as to form a slit on the tip end side. Then, high temperature gas is discharged from the slit.

  Next, the arrangement of the discharge units 43 with respect to the object X ′ will be described. Each of the discharge units 43 includes the discharge unit 43 provided on the second surface 412 and the discharge unit 43 provided on the first surface 411 adjacent to the discharge unit 43 as a set 43 a, and is provided on the third surface 413. The ejection portion 43 and the ejection portion 43 provided on the first surface 411 adjacent to the ejection portion 43 form a set 43 b. That is, the plurality of discharge units 43 provided in the blower panel 41 form a pair by the adjacent discharge units 43. The adjacent discharge portions 43 forming the respective sets 43a and 43b are arranged such that the high-temperature gases discharged from the respective discharge portions 43 merge before they reach the object X '(see FIG. See Figure 6). Further, as shown in FIG. 5, the high temperature gas discharged from the adjacent discharge parts 43 forming the respective sets 43a and 43b extends from the respective discharge parts 43 to the virtual points so as to pass the junction point Z, as shown in FIG. It is sprayed on the object X 'in the virtual areas Va and Vb (areas shown by oblique lines in FIG. 5) sandwiched on the far side of the junction point Z (lines indicated by dotted lines in FIG. 5) It has become. In the present embodiment, the high-temperature gas discharged from the adjacent discharge parts 43 forming the pair 43a, 43b is sprayed onto the object X 'in the overlapping area Vab where both virtual areas Va, Vb overlap. It is supposed to be

  In the present embodiment, adjacent discharge portions 43 of four sets 43a and 43b are disposed at substantially equal intervals so as to surround the object X 'across the transport path R. Thereby, as shown in FIG. 6, after the high temperature gas discharged from the adjacent discharge part 43 of each group 43a, 43b respectively joins, it sprays substantially uniformly from the circumference to processing object X '. Are configured to be

  The second gas heating mechanism 32 is an upper wall 312 inside the second housing 31 and facing the transport path R, in other words, a plurality of heaters 321 installed on the upper wall 312 constituting the main heating chamber 3S. And a duct 322 which is guided from the outside to the inside of the second housing 31 and directs the opening on one end side extending to the inside of the second housing 31 to the plurality of heaters 321. A pressure feeding mechanism (not shown) is connected to the other end side of the duct 322 extending to the outside of the second housing 31.

  Then, the main heating mechanism 30 guides the gas sent out by the pumping mechanism into the second housing 31 by the duct 322, passes the gas through the plurality of heaters 321, and then heats the second housing 31. It discharges to the main heating chamber 3S from each discharge part 43 of the ventilation cover 40 installed in both the inner side wall 311 of these.

  Next, the operation of the line heating device 100 according to the present embodiment will be described.

  First, when the object X with the label L placed thereon is placed on the endless belt 11 from the upstream side in the conveyance direction of the conveyance mechanism 10, the object X first moves on the conveyance path R and is spared It passes through the heating chamber 2S and is subjected to a preheating treatment. In the preheating process, the label L coated on the object X is heated at a temperature at which the label L does not shrink or slightly shrinks.

  And the to-be-mounted object X which passed preheating chamber 2S passes through this heating chamber 3S succeedingly, and this heat processing is given. In the main heating process, the label L placed on the object to be mounted X is heated to a temperature at which the label L contracts and adheres to the object to be mounted X. In the main heat treatment, the high temperature gas discharged from the four adjacent discharge parts 43 is joined to the label L covered with the object X which has reached the main heat treatment position after respectively joining. Be

  The high-temperature gas sprayed on the label L covered with the object X which has reached the main heat treatment position is then again pumped through an exhaust duct (not shown) provided on the transport mechanism 10 side. It is returned to the organization and circulated. Further, the object X to which the main heat treatment is applied and the label L is in close contact with the outer surface is transported by the transport mechanism 10 and sent to the next step.

  Next, based on FIGS. 7 and 8, the arrangement of the discharge parts 43 with respect to the object X ′ in a state in which the blower cover 40 is moved in the direction of moving backward (away) from the transport path R via the moving mechanism 50. explain. Note that FIG. 7 shows only the configuration of the inner side wall 311 on one side in the second housing 31, but the inner side wall 311 on the other side also has the same configuration.

  When the blower cover 40 is moved away from the transport path R via the moving mechanism 50, high-temperature gases discharged from the adjacent discharge portions 43 of the two sets 43a and 43b merge respectively on the front side of the object X ' After being merged again, it is arranged to be sprayed on the object X '(see FIG. 8). Further, the high temperature gas discharged from the adjacent discharge parts 43 of the two sets 43a and 43b extends from the adjacent discharge parts 43 of one set 43a so as to pass through the junction point Z (FIG. 7 The virtual region Va sandwiched on the far side of the confluence point Z in the middle, a line shown by a dotted line), and the respective imaginary lines extending so as to pass the confluence point Z from the adjacent discharge part 43 of the other set 43b The object is sprayed onto the object X 'in the overlapping area Vab where the virtual area Vb sandwiched on the far side of the junction Z overlaps, and more specifically, it is the overlapping area Vab and each discharge The high temperature gas discharged from the portion 43 and merged at the merging point Z is sprayed in a region farther from the merging point Z ′ where the merging is performed.

  Then, the high-temperature gas discharged from each discharge unit 43 is merged with the gases discharged from adjacent discharge units 43 forming each set 43a and 43b, and the combined high-temperature gas is further merged Later, by spraying the object X ', the high temperature gas flows along the outer surface of the object X' so as to wrap up. As a result, it is difficult for the label to shrink locally, and the entire label can be shrunk substantially uniformly with respect to the article X. That is, it becomes difficult to blow strong hot air locally on the outer surface of the object X '.

  As described above, by configuring each discharge unit 43 to move in the advancing and retreating direction with respect to the transport path R via the moving mechanism 50, high-temperature gas discharged from each discharge unit 43 to be each set 43a and 43b. It is possible to adjust the position at which the high temperature gas flows from the discharge portions 43 as described above. Further, even when the diameter of the object to be mounted X is changed, the joining position of the high temperature gas discharged from the discharge parts 43 can be adjusted to the optimum position.

  <Other Embodiments> As another embodiment, by adjusting the discharge angle of the adjacent discharge parts 43, as shown in FIG. 9, the junction points from the adjacent discharge parts 43 forming each set 43a, 43b are The crossing angle θ of the virtual line extended so as to pass through can be increased, and accordingly, the overlapping region Vab can be expanded in the direction parallel to the transport direction. With such a container, even if the container has an elliptical or rectangular cross section, the entire container can be disposed in the overlapping area Vab, and the entire outer surface of the container can be covered. Can be sprayed with high temperature gas.

  Further, in the above embodiment, by providing four discharge parts 43 on both sides of the conveyance path R, two sets of adjacent discharge parts 43 are provided on both sides of the conveyance path R. Without being limited to this, one set of adjacent discharge parts 43 may be installed on both sides of the conveyance path R, and three or more sets of adjacent discharge parts 43 may be installed. Further, adjacent discharge portions 43 forming a set may be installed on only one side of the conveyance path R. Moreover, you may install the discharge part 43 which does not make a set on any one side or both sides of conveyance path R.

  Moreover, in the said embodiment, although the tunnel-shaped main heating chamber 3S is employ | adopted, the main heating chamber 3S is not limited to a tunnel shape, For example, one conveyance port in which the to-be-mounted object X is taken in and out It may be the main heating chamber 3S provided only.

  Further, in the above embodiment, the high temperature gas discharged from the pair of adjacent discharge parts 43 merges and then travels in the direction in which the bisector of the corner sandwiched by both virtual lines extends. The configuration is not particularly limited as long as it is configured to move into the virtual area after being executed. In addition, the flow direction of the gas after confluence can be changed by making the air volume of the high temperature gas discharged from the said adjacent discharge part 43 different.

  Besides, it goes without saying that the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention.

DESCRIPTION OF SYMBOLS 100 label heating apparatus X mounting object L label 10 conveyance mechanism 20 preliminary heating mechanism 30 main heating mechanism 31 2nd housing | casing 40 ventilation cover 41 ventilation panel 43 discharge part 50 movement mechanism

Claims (6)

A label heating device for heating a label and attaching it to the object by blowing a high temperature gas onto the label coated on the object.
A plurality of discharge units arranged to surround the object to be mounted;
The discharge portion is tapered with a pair of air guide plates,
A label heating apparatus characterized in that the high-temperature gas discharged from the adjacent discharge parts is joined before the label coated on the mounted object. The object located in a virtual region located at a distant side of the confluence point of the virtual lines extending from the respective discharge parts to pass through the confluence point of the high temperature gas discharged from the adjacent discharge parts. The label heating device according to claim 1, wherein the label heating device is configured to be sprayed on a label coated on a mounting material. There are two or more sets of the adjacent discharge units,
The high-temperature gas discharged from the adjacent discharge parts of each set is configured to be sprayed onto a label coated on the object to be mounted that is located in an overlapping area where the virtual areas of the sets overlap. The label heating device according to claim 2. The label heating device according to any one of claims 1 to 3, wherein the set of the adjacent discharge parts are disposed to face each other with the object to be mounted interposed therebetween. The apparatus further comprises a transport mechanism for transporting the object to be mounted.
The label heating device according to any one of claims 1 to 4, wherein the set of the adjacent discharge units is disposed to face each other across the transport path of the transport mechanism. The label heating apparatus according to any one of claims 1 to 5, wherein the set of the adjacent discharge units is configured to be movable in the advancing and retracting direction with respect to the mounted object.