JP2005335810A - Heat sealer and medicine packing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat sealer capable of heat-sealing a thermally weldable sheet in three directions at a time, which is devised to simply prevent the occurrence of seal spots or the like, and a medicine packing machine. <P>SOLUTION: The heat sealer is equipped with a heating element 7, generating heat with power supply, on a heater base 5 for heat-sealing an elongate thermally weldable sheet in an approximately T shape. The heating element 7 has a first horizontal part 711 and a second horizontal part 712 extending lengthwise along the sheet and an approximately U-shaped U-section 713 extending widthwise along the sheet. An end of the first horizontal part 711 is connected with an end of the U-section 713, and an end of the second horizontal part 712 is connected with the other end of the U-section 713. In addition, the other end of the first part 711 and the other end of the second part 712 are connected with a power source, thereby providing the heat sealer as a means to solve the problem. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a heat sealing apparatus for performing heat sealing on a heat-weldable sheet and a medicine packaging apparatus including the heat sealing apparatus.

  2. Description of the Related Art Conventionally, a heat sealing apparatus that performs heat sealing on a long heat-weldable sheet and forms a package that is individually partitioned from the sheet has been used in medicine packaging apparatuses and the like. As shown in FIG. 8, the heat sealing apparatus 900 is energized with a long packaging sheet 901 formed by folding a long heat-weldable sheet at a center line along the longitudinal direction. An apparatus including a substantially T-shaped heater base 902 in which a heating element that generates heat is embedded, and a heater receiving base 903 disposed opposite to the heater base 902 with a packaging sheet interposed therebetween is known. This heat seal device 900 inserts a drug from the upper opening 904 formed in the packaging sheet 901, feeds the packaging sheet 901 by the packaging length for one minute, and then heats and presses with the heater base 902, Individual packaging bodies can be manufactured in which the packaging sheet 901 is heat-sealed in a substantially T shape at a time to wrap the medicine.

  More specifically, the heater base 902 of the heat seal apparatus 900 is a width seal portion 905 that heat-seals the width direction of the packaging sheet 901 and a seal portion that heat-seals the upper opening 904 of the packaging sheet 901 and is a width seal. Each of the seals includes a first seal portion 906 extending in the upstream direction from the upper end of the portion 905 and a second seal portion 907 extending in the downstream direction from the upper end of the width seal portion 905. Two heating elements 908 and 909 (for example, heating wires) are provided to raise the portions 905, 906, and 907 to the sealing temperature. Of these two heating elements, the first heating element 908 is embedded from the lower end of the width seal portion 905 of the heater base 902 to the tip of the first seal portion 906 as shown in FIG. The second heating element 909 is embedded from the lower end of the width seal portion 905 to the front end of the second seal portion 907.

  However, the conventional heat sealing apparatus in which the two heating elements 908 and 909 are used for one heater base 902 has a problem that it is difficult to control the temperature when heat sealing. That is, in order to prevent the occurrence of seal spots when heat-sealing the packaging sheet 901, the substantially T-shaped heater base 902 extending in three directions is such that all of the seal portions 905,. It is desirable to design it to be warm. However, if two heating elements 908 and 909 are used for one heater base 902, the power source becomes two systems, so the heating temperature, the heating rate, etc. of both heating elements must be carefully adjusted. For example, there is a problem in that the temperature of the first seal portion 906 and the second seal portion 907 cannot be increased in synchronization. In particular, when the lengths of the first seal portion 906 and the second seal portion 907 are different, the lengths of the two heating elements 908 and 909 are also different, so that adjustment is very difficult.

  The present invention has been made to solve the above-mentioned problems, and is a heat devised so that the occurrence of seal spots can be easily prevented in an apparatus capable of heat-sealing a heat-weldable sheet in three directions at a time. It is an object of the present invention to provide a sealing device and a medicine packaging device including the heat sealing device.

  In order to solve the above-mentioned problems, the present invention is a heat seal device in which a heater base is provided with a heating element that generates heat when energized, in order to perform heat sealing on a heat-weldable sheet, and the heater base has three sides. The heating element is arranged so as to extend in three directions of the heater base by passing through the trident sealing part, and both ends of the heating element are connected to a power source. A heat seal device is provided.

  In the heat sealing device, the heating element is disposed so as to pass through a trident seal portion (for example, substantially T-shaped) extending in three directions of the heater base. The sections can be heated simultaneously and to the same seal temperature. The heating element arranged in this way can be controlled by a single power source. Therefore, as compared with the conventional apparatus provided with two heating elements, temperature management can be easily performed, and the packaging sheet can be heat-sealed in three directions at a time without causing seal spots.

  Furthermore, the second means of the present invention is a heat sealing apparatus in which a heater base is provided with a heating element that generates heat when energized, in order to perform heat sealing in a substantially T shape on a long heat-weldable sheet. The heating element has a first horizontal part and a second horizontal part extending in the longitudinal direction of the heat-weldable sheet, and a substantially U-shaped U-shaped part extending in the width direction of the heat-weldable sheet, One end of one horizontal portion and one end of the U-shaped portion are connected, and one end of the second horizontal portion and the other end of the U-shaped portion are connected, and the other end of the first horizontal portion and the first Provided is a heat seal device in which the other end of two horizontal portions is connected to a power source.

  In such a heat sealing apparatus, the heating element has a first horizontal part and a second horizontal part extending in the longitudinal direction of the heat-weldable sheet, and a substantially U-shaped U-shaped part extending in the width direction of the heat-weldable sheet. Since one end of the first horizontal portion and one end of the U-shaped portion are connected, and one end of the second horizontal portion and the other end of the U-shaped portion are connected, when this heating element is heated, The first horizontal portion, the second horizontal portion, and the U-shaped portion can be simultaneously heated to the same seal temperature. As described above, the heat generating element in which the respective parts for heat-sealing the heat-weldable sheet in a substantially T shape can be controlled by a single power source. Therefore, the temperature can be easily controlled as compared with the conventional apparatus, and the packaging sheet can be heat-sealed in the width direction and the longitudinal direction at a time without causing seal spots.

In a preferred aspect of the present invention, there is provided a heat sealing apparatus in which the heating element constitutes a sheet heating surface of a heater base.
Furthermore, the present invention provides the above heat seal device, a drug distribution device that distributes and discharges the drug every predetermined amount, and a drug that supplies the drug discharged from the drug distribution device into the package formed by the heat welding sheet. Provided is a medicine packaging device including a supply device.

  According to the heat sealing device and the medicine packaging device according to the present invention, the medicine can be packaged by heat-sealing the packaging sheet in three directions at a time without causing seal spots and the like. In addition, since the heating element provided in the heat sealing apparatus can be controlled by a single power source, a plurality of heating elements are provided as in the conventional heat sealing apparatus provided with two heating elements. It is not necessary to make adjustments to synchronize, and management of the seal temperature can be easily performed. Therefore, the package can be heat-sealed in three directions easily and reliably.

  Hereinafter, an embodiment of a heat seal device according to the present invention will be described with reference to the accompanying drawings as appropriate. In the present embodiment, a case where the heat sealing apparatus is incorporated in a medicine packaging apparatus and used will be described as an example.

  FIG. 1 is a perspective view schematically showing a medicine packaging device in which a heat seal device is incorporated. As shown in FIG. 1, the medicine packaging device 100 distributes the heat sealing device 1 for heat-sealing the heat-weldable sheet 300, the medicine (powder and / or tablets) every predetermined amount, and A medicine dispensing device 200 that discharges the medicine for each predetermined amount and a medicine supply device 400 that supplies the medicine discharged from the medicine dispensing device 200 to the inside of the heat-weldable sheet 300 are provided. In addition, the code | symbol 60 in a figure is a protective cover which covers the heater stand and heater cradle which are mentioned later of the heat seal apparatus 1. FIG.

  The medicine packaging device 100 includes a gantry member 10 having a support wall 11, a rotatable paper tube drum 20 provided on one surface side 11 a of the support wall 11, and a roll body 310 attached to the drum 20. Drive means (not shown) for feeding out the sheet.

  In addition, the code | symbol 91-93 in a figure is a guide bar which guides the heat welding sheet | seat 300 drawn | fed out from the roll body 310, and is provided in the chemical | medical agent packaging apparatus 100 as needed or desired.

FIG. 2 is a perspective view showing an enlarged schematic configuration around the heat seal device (however, the protective cover 60 shown in FIG. 1 is omitted).
The drum 20 was wound with a sheet (hereinafter sometimes referred to as a “packaging sheet”) in which one heat-weldable sheet 300 was folded in two along the center line along the longitudinal direction with the heat-welding surface inside. A roll body 310 is attached. In addition, the packaging sheet 300 has, in addition to the aspect in which one heat-weldable sheet is folded in this way, for example, the lower end portion of two heat-weldable sheets on which the heat-weld surfaces are overlapped in the longitudinal direction. Various forms such as an aspect in which the heat-bonding sheet is bonded to the sheet and a form in which a single heat-weldable sheet wound in a roll shape is folded in half at the center line before the drug is put in can also be used.
The packaging sheet 300 fed out from the roll body 310 is sent out in the arrow X direction via the guide bars 91, 92, 93. The packaging sheet 300 (heat-weldable sheet) is not particularly limited as long as the inner surface can be heat-welded, and examples thereof include a laminate of glassine / polyethylene, cellophane / polyethylene, heat-resistant resin / polyethylene, and the like.
Reference numeral 40 denotes a conveyance roller for feeding the packaging sheet 300.

The delivered packaging sheet 300 is heat sealed by the heat sealing apparatus 1 so as to form individual packaging bodies.
Specifically, the heat sealing apparatus 1 sandwiches the packaging sheet 300 and the heater base 5 that is disposed on one side of the packaging sheet 300 and has a trident seal portion for heating and sealing the packaging sheet 300. And a heater cradle 6 disposed opposite to the heater pedestal 5. The heater base 5 and the heater cradle 6 are movable in a direction orthogonal to the packaging sheet 300. When performing heat sealing, the heater base 5 and the heater base 6 are moved in a direction in which they are close to each other and are sandwiched between them. The heat welding surface of the sheet 300 is heat sealed.

The heater base 5 extends in the width direction of the packaging sheet 300, and has a width seal portion 51 for partitioning the packaging sheet 300 individually, an upstream end from the upper end of the width seal portion 51, and an upper end portion of the packaging sheet 300. A first seal portion 52 for closing the upper opening 320 of the packaging sheet 300, a downstream direction from the upper end of the width seal portion 51, and along the upper end portion of the packaging sheet 300, The second seal portion 53 for closing the upper opening 320 of the seat 300 is formed, for example, in a substantially T-shape on the front as shown. The first seal portion 52 and the second seal portion 53 have different lengths. For example, the first seal portion 52 is formed shorter than the second seal portion 53.
The heater cradle 6 is formed and arranged in substantially the same shape as the heater pedestal 5 so as to mirrorly overlap the heater pedestal 5.

  As shown in FIG. 3A, the heating element 7 is provided on the inner surface (sheet facing surface) of the heater base 5, and is formed at a heating portion 71 that generates heat when energized, and at both ends of the heating portion 71. And the heat generating portion 71 passes through the respective seal portions 51, 52, 53 (first and second seal portions 52, 53, width seal portion 51) of the heater base 5. It is arranged. The heat generating portion 71 is provided so as to be exposed from the inner surface of the heater base 5. Therefore, in the present embodiment, the heating element 7 constitutes a sheet heating surface that directly contacts the packaging sheet 300 and heats the packaging sheet 300.

  More specifically, the heating element 7 is a single linear (plate-like) heating member including a heating part 71 and terminal parts 72, 72. The heat generating part 71 includes a first horizontal part 711, a second horizontal part 712, and a U-shaped part 713. The terminal portion 72 is connected to end portions of the first horizontal portion 711 and the second horizontal portion 712. For example, the terminal portion 72 for connecting the power source is formed of a metal plate (stainless steel plate or the like) that is formed wider than the heat generating portion 71 and formed so that the heat generating portion 71 has a substantially uniform width and thickness. ing. The U-shaped part 713 has a pair of vertical parts 714 and 715 and an inversion part 716.

  The heat generating portion 71 as described above has a configuration including a straight portion and curved portions 85 and 86 connecting the straight portions so as to change the direction of the straight portions. That is, the straight line portion corresponds to a pair of vertical portions 714 and 715 of the first horizontal portion 711, the second horizontal portion 712, and the U-shaped portion 713. The end portions of the first horizontal portion 711 and the vertical portion 714 are connected to each other via the curved portion 85. The end portions of the second horizontal portion 712 and the vertical portion 715 are connected to each other via the bending portion 86. More specifically, the one side edge 711a of the first horizontal portion 711 and the one side edge 714a of the vertical portion 714 are connected by the inner diameter side edge 85a of the curved portion 85, and the other side edge 711b of the first horizontal portion 711 is connected. The other side edge 714 b of the vertical part 714 is connected by the outer diameter side edge 85 b of the curved part 85. Further, the one side edge 712a of the second horizontal portion 712 and the one side edge 715a of the vertical portion 715 are connected by the inner diameter side edge 86a of the curved portion 86, and the other side edge 712b of the second horizontal portion 712 and the vertical portion 715 are connected. The other side edge 715 b is connected by the outer diameter side edge 86 b of the bending portion 86. As a result, the curved portion 85 is formed in an arc shape around a center point (not shown) having a predetermined radial width. The curved portions 86 are each formed in an arc shape around a central point (not shown) having a predetermined radial width. Further, the vertical portions 714 and 715 are connected to each other via the reversing portion 110 (another bending portion 99).

Both terminal portions 72, 72 of the heating element 7 are disposed so as to protrude outward from the front ends of the first seal portion 52 and the second seal portion 53 of the heater base 5. Therefore, the line shape of the heat generating portion 71 continuous between the terminal portions 72 and 72 starts from one terminal portion 72, extends along the inner surface of the first seal portion 52 of the heater base 5, and is a width seal portion. At the upper end of 51, it is bent approximately 90 degrees downward via the bending portion 85 and reaches the lower end of the width seal portion 51. 51 extends to the upper end side of the width seal portion 51, bends approximately 90 degrees via the bending portion 86 at the upper end of the width seal portion 51, extends along the second seal portion 53, and continues to the other terminal portion 72.
Thus, the line shape of the heat generating portion 71 has a substantially U-shaped U-shaped portion 713 extending in the width direction of the packaging sheet, and one end portion of the first horizontal portion 711 and one end portion of the U-shaped portion 713 are arranged. The second horizontal portion 712 and the other end of the U-shaped portion 713 are connected to each other.

  Further, as shown in FIG. 3B, a heat insulating layer 8 such as a heat resistant foamed resin sheet is interposed between the heat generating portion 71 and the inner surface of the heater base 5. 8, and the heat insulating layer 8 and the inner surface of the heater base 5 are bonded with a heat-resistant adhesive. By interposing the heat insulating layer 8 in this manner, the heater base 5 does not reach a high temperature, so that, for example, a burn due to contact with the outer surface of the heater base 5 can be prevented, and the heater base 5 has a relatively low heat resistance. It can also be made of a material.

  Further, a temperature sensor 9 (a thermistor is used in this embodiment, but various sensors such as a thermocouple can be used as long as the temperature can be detected) is provided in a part of the heat generating portion 71. ing. The temperature sensor 9 is interposed between the heat generating portion 71 and the heat insulating layer 8 and is connected to a control circuit (power source) provided in the heat sealing apparatus 1. This control circuit is, for example, a control unit that is disposed at an appropriate location (not shown) of the casing of the packaging device 1 shown in FIG. 1 and controls the current supplied to the heating element 7 of the heater base 5. .

This control circuit has at least a function of raising the temperature of the heating element 7 to at least two temperatures of a seal temperature and a temperature different from the seal temperature.
The sealing temperature is appropriately set according to the type of the heat-welding sheet 300 to be used, and is about 80 to 130 ° C., for example, 100 to 110 in the case of glassine / low density polyethylene. In the case of cellohan / low density polyethylene, the temperature is set to about 120 to 130 ° C.
The temperature different from the seal temperature is, for example, a temperature that is lower than the seal temperature and does not cause a burn immediately when touched by the hand (for example, about 50 to 60 ° C.), and is higher than the seal temperature and adhered to the heat generating part. Examples thereof include a temperature at which the material can be melted (for example, about 140 to 190 ° C.), a temperature that is higher than the seal temperature and that can carbonize deposits attached to the heat generating portion (for example, 400 ° C. or more)
The heating element 7 in the present embodiment is set by a control circuit so as to increase the temperature to two kinds of temperatures, that is, a sealing temperature of 80 to 130 ° C. and a carbonization temperature of 400 ° C. or more. The user can change the temperature of the heating element 7 as desired through an operation panel (not shown) provided in the case.
The temperature of the heating element 7 can be changed to two or more combinations of the seal temperature and the carbonization temperature, the seal temperature and the melting temperature of about 140 to 190 ° C., and the sealing temperature, the melting temperature, and the carbonization temperature. You may do it.

  As shown in FIG. 2, the medicine packaging device 100 having the above-described configuration is disposed on the upstream side of the heat seal device 1 from the upper opening 320 of the packaging sheet 300 via the hopper 21 of the medicine distribution device 200. Is inserted. After the medicine is inserted, the packaging sheet 300 is sent to the downstream side by the length of one package by the conveying roller 40. Then, with the heating element 7 heated to the sealing temperature, the packaging sheet 300 is sandwiched between the heater base 5 and the heater cradle 6, whereby the width direction and the longitudinal direction of the packaging sheet 300 are heat sealed. As a result, the partition sheet 330 and the two-direction closing seal walls 340 and 340 that are orthogonal to the partition seal wall 330 and extend upstream and downstream are formed in the packaging sheet 300 at one time. By sequentially repeating the insertion of the medicine and the formation of the seal wall, a package body in which the medicine is packaged can be continuously produced.

  Since the heat seal device 1 is provided with one heating element 7 for one heater base 5, the heating element 7 can be controlled to generate heat by a single control circuit. Since the heating element 7 is disposed so as to pass through the entire substantially T-shaped seal portion of the heater base 5, the heating element 7 is controlled by one system control circuit (so as to have a predetermined temperature such as a sealing temperature). Only by controlling, the packaging sheet 300 can be heat-sealed in three directions at a time without causing seal spots.

  When heat sealing is performed for a long time, a part of the heat-weldable sheet 300 such as a part of the heat-weldable resin adheres and accumulates on the surface (sheet heating surface) of the heating element 7 with time. If heat sealing is performed with the sheet scraps attached in this manner, a sealing failure may occur or the resulting package may become dirty. In such a case, when the heating element 7 is heated to the carbonization temperature, the sheet waste adhering to the heating surface can be carbonized. Then, if electricity supply is stopped and the heating element 7 is cooled to room temperature, the carbonized sheet waste can be easily wiped off.

  4-7 show another embodiment. In the heat sealing apparatus 1 shown in these drawings, a different part from the above embodiment is the structure of the heat generating portion 71. That is, one curved portion 85 of the heating element 7 shown in FIG. 4 is continuously provided on the curved inner diameter side edge connected to the one side edge in the width direction of the straight portions and the other width direction edge of the straight portion. A curved outer diameter side edge, and an inner diameter than a virtual arc drawn around the center of curvature of the inner diameter side edge so as to connect the outer diameter side edge to the other side edge in the width direction of the straight portions. The position is shifted to the side.

  Similarly, in the other curved portion 86, the curved portion 86 is continuously provided on the curved inner diameter side edge connected to the one side edge in the width direction of the straight portions and the other width direction edge of the straight portion. Than the virtual arc drawn around the center of curvature of the inner diameter side edge so as to connect the outer diameter side edge to the other side edge in the width direction of the linear portions. The position is shifted to the inner diameter side.

  The bending portion 85 and the bending portion 86 are symmetrical. Specifically, referring to FIG. 4, in the curved portion 85, one side edge 711 a and one side edge 714 a of the vertical portion 714 in the first horizontal portion 711 and the U-shaped portion 713, which are straight portions, are arcuate. It is connected by an arcuate inner diameter side edge 85a (inner diameter side edge 85a of the bending portion 85) centering on the center P1. Further, in the vertical portion 714 of the first horizontal portion 711 and the U-shaped portion 713, the other side edge 711b and the other side edge 714b have an arcuate outer diameter side edge 85b (curved portion 85) centered on the arc center P1. Are connected by an inner diameter side edge 85b). However, the outer diameter side edge 85b is an imaginary center drawn on the arc center P1 so as to connect the end portions of the first horizontal portion 711 and the other side edge 711b and the other side edge 714b of the vertical portion 714 of the U-shaped portion 713 to each other. The position is slightly displaced toward the inner diameter side through the radial step r1 with respect to the arc R1. For example, the amount of displacement is set to 0.1 mm with respect to the virtual arc R1.

  In the curved portion 86, the one side edge 712a and the one side edge 715a in the second horizontal portion 712, which is a straight portion, and the vertical portion 715 of the U-shaped portion 713, have an arcuate inner diameter centered on the arc center P2. The side edges 86a (the inner diameter side edges 86a of the curved portion 86) are connected. Further, in the vertical portion 715 of the second horizontal portion 712 and the U-shaped portion 713, the other side edge 712b and the other side edge 715b have an arcuate outer diameter side edge 86b (curved portion 86) centered on the arc center P2. Are connected by an inner diameter side edge 86b). However, the outer-diameter side edge 86b is an imaginary center drawn on the arc center P2 so as to connect the second horizontal part 712 and the other side edge 712b of the vertical part 715 of the U-shaped part 713 and the end parts of the other side edge 715b. The position is slightly displaced toward the inner diameter side through the radial step R2 with respect to the arc R2. Since other configurations are the same as those of the embodiment shown in FIGS. 1 to 3, the description thereof will be omitted, and the operation will be described below with reference to FIGS. 1 to 3.

  In the above configuration, when the heat generating portion 71 is energized, it is heated, both the heater base 5 and the heater cradle 6 are moved in directions close to each other, and the heat welding surface of the packaging sheet 300 sandwiched between the two is heated. Sealed. At this time, as shown in FIG. 5, the heat seal portion H formed by heat sealing is transferred with the shape of the portion in contact with the heat generating portion 71. A curved portion H1 by 86 is also formed. By the way, the outer diameter side edge 85b of the curved portion 85 is connected to the arc center P1 so as to connect the end portions of the first horizontal portion 711 and the other side edge 711b and the other side edge 714b of the vertical portion 714 of the U-shaped portion 713 to each other. The position is slightly displaced toward the inner diameter side via the small radial step r1 with respect to the drawn virtual arc R1. As a result, the amount of current flowing through the bending portion 85 is not biased in the bending portion 85. Therefore, the temperature of the curved portion 85 is not biased. By the way, in the curved portion 85, the outer diameter side edge 85b is connected to the first horizontal portion 711, the other side edge 711b of the vertical portion 714 of the U-shaped portion 713, and the end of the other side edge 714b. If the arc shape coincides with the arc R1 drawn in (1), the temperature on the outer diameter side of the curved portion 85 tends to be lower than the temperature on the inner diameter side during energization (heat sealing). For this reason, in the curved shape portion H1 of the heat seal portion H, the outer side portion becomes a hue (or seal spot) that becomes cloudy, for example, and there is anxiety that the seal may not be surely performed. There is a case where it is given to a user or a person who takes a medicine (in fact, there is no problem in sealing performance because the inner portion of the curved portion H1 is surely heat-sealed).

  However, in this embodiment, since the amount of current flowing through the bending portion 85 is not biased in the radial direction of the bending portion 85, the temperature of the bending portion 85 is also not biased. For this reason, it can suppress effectively that the difference in hue occurs in the curved shape part H1 of the heat seal part H, and a sense of security can be given to the user of the apparatus or the user of the medicine. The same applies to the curved portion H2 formed by the curved portion 86.

  In addition, although the outer diameter side edge 85b of the bending part 85 formed the small step r1, r2 of the radial direction in the bending part 85, and formed in the circular arc concentric with the inner diameter side edge 85a, it is not limited to this. For example, the center of the arc of the outer diameter side edge 85b is decentered from the center of the arc of the inner diameter side edge 85a, and the bending portion 85 is provided with the outer diameter side edge 85b of the bending portion 85 without providing the radial small steps r1 and r2. A configuration in which the other side edge 711b of the horizontal portion 711 and the other side edge 714b of the vertical portion 714 are directly connected is also possible (the same applies to the curved portion 86 side). Alternatively, the outer diameter side edge 85b and the inner diameter side edge 85a of the bending portion 85 do not have to be arcs, and may be arcuate, as long as the bending portion 85 is uniformly energized. The same applies to the bending portion 86.

  Furthermore, as shown in the enlarged view of FIG. 6, the heat radiating part 500 having a function of radiating the heat of the region 300a where the wrapping sheet 300 (the lower edge part 300c) does not come into contact with the reversing part 110 during the packaging operation. It is also possible to provide it. Specifically, the heat dissipating part 500 has a widened part 500b having a width B2 larger than the width B1 of the (reversing part 110) and having an inclined surface 500a continuous with the reversing part 110. The heat dissipating part 500 is formed in a plate shape, a trapezoidal shape, and a metal plate (stainless steel plate or the like) formed so as to have a substantially uniform thickness with the heat generating part 71. Other configurations are the same as in the above embodiment.

  In the heat generating part 71, the heat of the heat generating part 71 at the time of heat sealing is taken away by the contact of the packaging sheet 300. Therefore, the region 300a where the packaging sheet 300 is not in contact tends to become hot. However, in the embodiment of the present invention, since the heat dissipating part 500 that radiates the heat of the region 300a where the packaging sheet 300 does not contact during the packaging operation of the reversing part 110 is formed integrally with the reversing part 110, the packaging The heat radiating part 500 absorbs heat in the region 300a where the sheet 300 does not contact. For this reason, the area | region 300a where the packaging sheet 300 does not contact does not become high temperature. Therefore, the heater base 5 can be made of a material having relatively low heat resistance.

  The size of the heat dissipating part 500 only needs to have a sufficient heat dissipating function. Further, the vertical position with respect to the heater base 5 is not particularly limited. That is, it may be determined in consideration of the height of the width seal portion 51 and the vertical height position when the packaging sheet 300 is delivered. In the case of the present embodiment, as shown by the solid line in FIG. 6, the widened portion 500 b of the heat radiating portion 500 is provided so as to be placed on the heater base 5 (width seal portion 51) and exposed from the inner surface.

The heat sealing device and the medicine packaging device of the present invention are not limited to the modes exemplified in the above embodiment, and various design changes can be made within the intended scope of the present invention.
For example, in the above-described embodiment, the line shape of the heat generating portion 71 of the heat generating element is formed so as to extend from the first seal portion 52 of the heater base 5 to the width seal portion 51 and to be inverted and extend to the second seal portion 53. Therefore, the length of the heat generating part 71 passing through the respective parts 51, 52, 53 of the heater base 5 can be shortened, and the temperature of the entire heat generating part 71 of the heat generating body 7 can be easily raised substantially uniformly. The line shape of the heat generating portion 71 of the invention is not limited to this. For example, as shown in FIG. 7A, the first seal portion 52 extends from the lower end of the width seal portion 51 of the heater base 5 and is inverted at the tip of the first seal portion 52 to the second seal portion 53. It is also possible to form it so that it is further inverted at this end portion and reaches the lower end of the width seal portion 51.

  In this case, the reversing part Re is in the first horizontal part 711 and the second horizontal part 712, the terminals 72 and 72 are at the lower ends of the vertical parts 714 and 715, and the terminals 72 and 72 are not in contact with the packaging sheet 300. Is formed in a large area (the terminals 72 and 72 also serve as a heat radiating portion).

  Moreover, in the said embodiment, since the heat generating body 7 is provided in the inner surface of each seal | sticker part of a heater stand, and this heat generating body 7 is comprised so that it may contact the packaging sheet 300 directly, the heating temperature to a packaging sheet is set. Although it is preferable because it is easy to control, for example, as shown in FIG. 7B, a heating element such as a heating wire can be embedded in the heat table. In such a case, the inner surface of the heater base 5 is brought into direct contact with the packaging sheet for heat sealing, and the heater base 5 is formed of a material having heat resistance and thermal conductivity (metal such as stainless steel). Is done.

It is a perspective view showing roughly the medicine packing device in which the heat seal device concerning one embodiment of the present invention was built. It is a perspective view which expands and shows schematic structure of the heat seal apparatus periphery shown in FIG. (A) is a front view which shows the schematic structure which looked at the heater stand of the heat seal apparatus shown in FIG. 1 from the inner surface side, (b) is a top view which shows the schematic structure which looked at the heater stand from the upper surface side. . It is a front view of the curved part of the heat generating body which shows the modification of this invention. It is a front view of a medicine package similarly. It is a front view of the inversion part of the heat generating body which shows the modification of this invention. (A), (b) is a front view which is a modification of a heater stand, and shows schematic structure which looked at the heater stand from the inner surface side. (A) is a perspective view which shows schematic structure of the heat seal apparatus periphery of the conventional heat seal apparatus, (b) is a front view which shows schematic structure of the seal stand of the heat seal apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Heat seal apparatus, 5 ... Heater stand, 6 ... Heater cradle, 7 ... Heat generating body, 8 ... Heat insulation layer, 9 ... Temperature sensor, 51 ... Width seal part, 52 ... 1st seal part, 53 ... 2nd seal , 71 ... Heat generating part, 72 ... Terminal part, 85, 86 ... Curved part, 85a ... Inner diameter side edge of curved part, 85b ... Outer diameter side edge of curved part, 86a ... Inner diameter side edge of curved part, 86b ... Curved 100 ... drug packaging device, 110 ... reversing unit, 200 ... drug dispensing device, 300 ... heat-weldable sheet (packaging sheet), 320 ... upper opening of package, 400 ... drug supply device 711 ... first horizontal portion, 711a ... one side edge of the first horizontal portion, 711b ... other side edge of the first horizontal portion, 712 ... second horizontal portion, 712a ... one side edge of the second horizontal portion, 712b ... The other side edge of the second horizontal part, 713 ... U-shaped part, 714 ... vertical part, 714a ... one side of the vertical part , 714b ... the other side edge of the vertical portion, one side edge of 715a ... vertical section, the other side edge of 715b ... vertical section, 716 ... reversing unit

Claims (4)

In order to heat-seal the heat-weldable sheet, a heat-sealing device provided with a heating element that generates heat by energizing the heater base,
The heater base has a three-pronged seal portion extending in three directions, and the heating element is arranged so as to extend in three directions of the heater base by passing through the three-pronged seal portion by reversing the both ends of the heating element. The heat sealing device, wherein the unit is connected to a power source. In order to perform heat sealing in a substantially T shape on a long heat-weldable sheet, a heat sealing device provided with a heating element that generates heat when energized in a heater base,
The heating element has a first horizontal part and a second horizontal part extending in the longitudinal direction of the heat-weldable sheet, and a substantially U-shaped U-shaped part extending in the width direction of the heat-weldable sheet,
One end of the first horizontal part and one end of the U-shaped part are connected, and one end of the second horizontal part and the other end of the U-shaped part are connected, and the first horizontal part The heat seal device is characterized in that the other end of the second end and the other end of the second horizontal portion are connected to a power source.   The heat sealing apparatus according to claim 1, wherein the heating element constitutes a sheet heating surface of a heater base. A heat seal device according to any one of claims 1 to 3,
A drug distribution device that distributes and discharges the drug every predetermined amount;
A medicine packaging device, comprising: a medicine supply device that supplies the medicine discharged from the medicine dispensing device into a package formed by the heat welding sheet.

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