JP2002019737A - Heat-sealing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent wrinkles from being generated on a packaging sheet, and increase the sealability. SOLUTION: The band-shape packaging sheet 3 which is carried in the longitudinal direction under a doubly folded state is heat-sealed. Thus, a plurality of medicine enclosing portion packaging bodies 12 which enclose a medicine are formed by this heat-sealing device. The heat-sealing device is equipped with a heating means 21 and a receiving means 20 which approach or separate from each other. Then, both pieces 3b and 3b of the packaging sheet are gradually heat-sealed from a folded section 3a to the opening edge by the heating means 21 and the receiving means 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat sealing apparatus used for a packaging machine for packaging, for example, a medicine in a packaging sheet.

[0002]

2. Description of the Related Art In general, in a heat sealing device of a packaging machine for packaging a medicine, the medicine is packaged by using a heat-sealing packaging sheet. As this type of heat sealing device, for example, a device described in Japanese Patent Application Laid-Open No. H8-230832 is known. As shown in FIG. 4, the heat sealing device described in the same publication has a pair of heat rollers 1 having a built-in heating source.
02, and on its heated surface, the drug is
The packaging sheet 101 put into the packaging state from the package 11
The heat roller 102 itself is rotationally driven and fed, and is sealed for one minute every one rotation of the heat roller 102.

[0003]

The heat roller 102 of the heat sealing device has a cylindrical first sealer portion 103 for heat sealing the packaging sheet 101 in the longitudinal direction, and a packaging sheet 101 for each rotation of the heat roller 102. And a second sealer portion 105 for heat-sealing in a lateral direction.

The second sealer portion 105 heat seals the packaging sheet 101 in the short direction at the same time with the same pressing force, so that the packaging sheet 101 is easily wrinkled, and the packaging sheet 101 is wrinkled. If heat sealing is carried out with the occurrence of, the sealing property is inferior and the medicine is adversely affected, which is not preferable.

[0005] In particular, when the packaging sheet is set up with the opening facing upward as shown in Fig. 4A, the generation of wrinkles in the heat seal portion of the packaging sheet tends to be remarkable.

Accordingly, an object of the present invention is to prevent the generation of wrinkles on a packaging sheet and improve the sealing performance.

[0007]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is characterized in that a strip-shaped wrapping sheet 3 conveyed along a longitudinal direction in a state of being folded in two. Is a heat sealing apparatus for forming a plurality of medicine-encapsulated packaging bodies 12 for enclosing a medicine by heat-sealing a heating means 21 and a receiving means 20 which approach or separate from each other, and a heating means 21 and a receiving means. By 20,
The purpose is to heat seal the two pieces 3b of the packaging sheet 3 gradually from the bent portion 3a toward the opening edge.

[0008] Further, the receiving means includes a movable plate 34 inclined so as to be separated from the bent portion 3a of the two pieces 3b of the packaging sheet 3 toward the opening edge, and a standby posture in which the movable plate 34 is inclined. It is preferable that the heating means heat-seal the packaging sheet 3 while changing the movable plate 34 to the heat-sealing posture.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a roll of a long wrapping sheet (wrapping paper) 3 which is wound in a roll in a state of being folded in two at a substantially intermediate position in the lateral direction. The paper is conveyed intermittently along the longitudinal direction X by the feed rollers 5 and 5. Further, the packaging sheet 3 is fed so that the bent portion 3a is located at the lower end, and the opening 7 between the two sheet pieces 3b, 3b having heat sealing property (heat sealing property) faces upward. The packaging sheet 3 is made of a material such as glassine paper, which is coated with a heat-sealing material layer of a synthetic resin material.

[0010] A tip of a hopper 8 into which a predetermined amount of medicine (for example, a powdered medicine or a tablet) is inserted is inserted between the two sheet pieces 3b, 3b. It is designed to be filled inside.

A heat sealing device 10 is provided between the hopper 8 and the feed rollers 5 and 5. The heat sealing device 10 forms a plurality of continuous medicine-encapsulated packages 12 for enclosing a medicine by welding the welding portions S provided at regular intervals of the band-shaped packaging sheet 3.

The packaging sheet 3 is welded at a first seal portion S1 and a second seal portion S2. The first seal portion S <b> 1 is formed by overlapping the opening edges of the packaging sheet 3 in the short direction Y, and is formed along the longitudinal direction X of the packaging sheet 3. The second seal portion S2 is formed over the entire length from the first seal portion S1 along the short direction Y of the packaging sheet 3. In addition, a perforation 15 for cutting the band-shaped packaging paper into each medicine-encapsulated packaging body 12 may be formed in the first welded portion.

The heat sealing device 10 includes a casing 17 through which the packaging sheet 3 is inserted as shown in FIG. The heating means 21 is provided on one side wall 17a of the casing 17, and the receiving means 20 is provided on the other side wall 17b. In addition, the heating means 21 approaches or separates from the receiving means 20.

The heating means 21 has a heating plate 23 in which a heater or the like is incorporated. On the front surface of the heating plate 23, a T for forming the first seal portion S1 and the second seal portion S2 is formed. A heating section 35 having a letter shape or an L shape is provided. One end of a guide bar 26 is fixed to the back surface of the hot plate 23, and the guide bar 26 is slidably inserted into a guide member 28 fixed to one side wall 17a. Here, the heating plate 23 sandwiches both the pieces 3 of the packaging sheet 3 with the receiving means 20.

The other end of the guide bar 26 projects from one side wall 17a, and the projecting portion has
A spring 30 as an elastic body for urging the third member 3 in a retreating direction is externally fitted. As means for advancing the hot plate 23, the other end of the guide bar 26 is pushed out by a conventionally known means (not shown) such as a cam mechanism or a cylinder.

The receiving means 20 includes a movable plate 34 having a rubber plate 32 having a shape corresponding to the heating section 35 fixed to the front surface. The movable plate 34 and the rubber plate 3
Numeral 2 is provided so as to be inclined upward and away from the heating plate 23.

More specifically, for example, one end of a pair of upper and lower guide bars 35 is pivotally connected to the back surface of the movable plate 31, and the movable plate 31 is pushed to the packaging sheet 3 side by each of the guide bars 35 a and 35 b. Springs 36a, 36 respectively
b is externally fitted and each of the guide bars 35a, 35
“b” is inserted into the other side wall 17b so as to be able to move back and forth. The lower spring 36a is longer than the upper spring 36b, and the movable plate 34 maintains a standby posture in which the rubber plate 32 is inclined in a natural state in which the rubber plate 32 is separated from the hot plate 23.

Next, a case where the medicine is packaged in the packaging sheet 3 using the heat sealing device 10 will be described. First, the packaging sheet 3 wound in a roll shape is intermittently transported by the feed rollers 5 and 5.

When the medicine is filled into the packaging sheet 3 from the hopper 8, the feeding of the packaging sheet 3 is stopped, and the heat sealing device 10 is operated. That is, when the packaging sheet 3 stops at a predetermined position, the guide plate 26 of the heating means 21 is pushed out, so that the hot plate 23 approaches the packaging sheet 3 (see FIG. 3A).

Further, the hot plate 23 is moved and heat-sealed by first pressing the lower part of the packaging sheet 3 against the inclined rubber plate 32 of the receiving means 20 (see FIG. 3B).

When the hot plate 23 is further moved and the rubber plate 32 of the receiving means 20 is pushed, the rubber plate 32
At the same time, it retreats to a predetermined position against the springs 36a and 36b, and gradually assumes a vertical posture. With the change in the attitude of the rubber plate 32, the heating unit 35 of the heating plate 23 of the heating means 21
In cooperation with the rubber plate 34, both sides 3b, 3 of the packaging sheet 3
b can be heat-sealed by sequentially pressing it downward (bent portion 3a) upward (opening edge).

As described above, by pressing both pieces of the packaging sheet 3 sequentially from below, the second sealing portion S2 is sequentially heat-sealed while tensioning the packaging sheet 3 in the lateral direction. Further, the heating plate 23 covers the entire surface of the heating section 35 with a rubber plate 34.
By pressing the heat sealing posture (Fig. 3
(See (c)), the first sealing portion S1 and the second sealing portion S2 can be securely hermetically sealed to both pieces 3b, 3b of the packaging sheet. In particular, the second sealing portion S2 holds the packaging sheet 3 Although the medicine is filled and packaged in the upright state, wrinkles do not occur in the short direction Y of the packaging sheet 3.

Further, when the heating means 21 is retracted by the spring 30 after the heat sealing step, the receiving means 20
Move the movable plate 34 to the original standby position. And the said packaging process is performed repeatedly.

The present invention is not limited to the above-described embodiment. For example, the heating plate 23 may be inclined in advance (inclined in the direction away from the receiving means upward), or the heating plate 23 Both of the movable plates may be inclined in an inverted C shape.

Although the packaging sheet is formed by bending a single sheet, it may be a sheet obtained by, for example, heat-sealing one side of a separate sheet in the longitudinal direction in advance.

The packaging sheet 3 is not limited to being packaged in an upright state. The packaging sheet 3 can be heat-sealed in a state where the packaging sheet 3 is laid down in the horizontal direction. Further, the material of the packaging sheet is not particularly limited as long as it has heat sealing properties.

[0027]

The heat-sealing apparatus of the present invention comprises a heating means and a receiving means which approach or separate from each other, and heat-seals both pieces of the packaging sheet gradually from the bent portion toward the opening edge. Therefore, when the packaging sheet is heat-sealed in the transverse direction, it can be heat-sealed while being stretched so that both pieces are stretched, wrinkles can be prevented, and a good sealing state can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing an embodiment of the present invention.

FIGS. 2A and 2B show a heat sealing device, wherein FIG. 2A is a side view including a partial cross section in a state where a receiving unit is in a standby position, and FIG. 2B is a side view in a state where the receiving unit is in a heat sealing position.

FIGS. 3A to 3C are schematic views respectively showing a heat sealing step of a packaging sheet.

4A and 4B show a conventional example, wherein FIG. 4A is a schematic perspective view, and FIG. 4B is a plan view showing a main part.

[Explanation of symbols]

3 ... packaging sheet, 3a ... bent part, piece, 3b ... piece, 20 ...
Receiving means, 21 heating means, 34 movable plate, 36a, 36
b ... Spring (elastic body)

Claims (2)

[Claims] 1. A heat treatment for forming a plurality of medicine-encapsulated packaging bodies (12) for enclosing a medicine by heat-sealing a band-shaped packaging sheet (3) conveyed in the longitudinal direction in a folded state. A sealing device, comprising heating means (21) and receiving means (20) approaching or separating from each other;
A configuration in which both pieces (3b) and (3b) of the packaging sheet (3) are gradually heat-sealed from the bent portion (3a) toward the opening edge by the heating means (21) and the receiving means (20). A heat sealing device characterized by the above-mentioned. 2. The receiving means (20) includes a packaging sheet (3).
A movable plate (34) inclined so as to move away from the bent portion (3a) of the two pieces (3b) and (3b) toward the opening edge, and biases the movable plate (34) to the inclined standby posture. Elastic bodies (36a) and (36b), and the heating means changes the position of the movable plate (34) to a heat-sealing posture against the elastic bodies (36a) and (36b). The heat sealing device according to claim 1, wherein (3) is heat-sealed.