JP4184095B2 - Brake mechanism, heat seal device and medicine packaging device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat seal device that feeds a sheet from a paper tube formed by winding a long heat-weldable sheet to form individually partitioned packages.
[0002]
[Prior art]
The heat seal device includes a paper tube drum that supports a paper tube formed by winding a long heat-weldable sheet in a roll shape, and a drive roller that feeds the heat-weldable sheet from the paper tube. Drive means, and heat seal means for heat-sealing the heat-weldable sheet fed out by the drive means, so that individually partitioned packages can be formed from the heat-weldable sheet. It is configured.
[0003]
Such a heat seal device is usually provided with a brake mechanism, and prevents the paper tube drum from rotating unexpectedly when the conveyance of the sheet by the driving means is stopped by the brake mechanism. It has come to be able to do.
[0004]
However, since the conventional brake mechanism is electromagnetic, there is a problem that the structure is complicated and the cost is increased.
Further, the electromagnetic brake mechanism has a problem that no braking force is applied to the paper tube drum when the main power of the heat seal device is turned off.
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of the problems in the prior art described above, and is a brake mechanism with a simple structure that can reliably apply a braking force to the paper tube drum when the conveyance of the heat-weldable sheet by the driving means is stopped. Providing is one purpose.
In addition, the present invention can prevent fluctuations in tension acting on the heat-weldable sheet during conveyance of the heat-weldable sheet by the driving means, and paper tube drum when the conveyance of the heat-weldable sheet by the drive means is stopped. Another object is to provide a heat seal device having a simple structure capable of applying a braking force to the above.
[0006]
[Means for Solving the Problems]
  In order to achieve the above-mentioned object, the present invention is a paper tube drum that is mounted on a gantry member so as to be relatively rotatable, and a paper tube formed by winding a long heat-weldable sheet in a roll shape is relatively rotated. An unsupported paper tube drum, driving means for feeding out the heat-weldable sheet from the paper tube body supported by the paper tube drum, a proximity direction close to the paper tube drum and a separation distance from the paper tube body A tension arm that is swingably supported by the gantry member so as to swing in the direction, a tension biasing member that biases the tension arm in the proximity direction, and the thermal welding property that is drawn out by the driving means. A tension bar supported by the tension arm so as to be inserted in a sheet conveyance path, wherein the tension arm is applied by a tensile force applied to the heat-weldable sheet by the driving means. A tension bar engaged with the heat-weldable sheet so as to swing in the separation direction against the urging force of the tension-urging member, and heat seal for heat-sealing the heat-weldable sheet And a brake mechanism applied to a heat seal device that forms individually partitioned packages from the heat-weldable sheet, the brake drum being supported by the paper tube drum so as not to be relatively rotatable,It is supported by the gantry member so as to be movable in the radial direction of the brake drum so as to be able to contact and separate in the radial direction with respect to the brake drum, and not to move in the circumferential direction of the brake drum. A braking member whose surface facing the outer peripheral surface of the brake drum is a concave surface corresponding to the outer peripheral surface of the brake drum, and when the tension arm is swung in the proximity direction, Pushing member supported by the tension arm so as to push toward the drumAnd a brake mechanism.
[0009]
  Preferably, a separation urging member that urges the braking member in a direction away from the brake drum can be further provided..
  in frontThe pressing member is a push rod supported by the tension arm so as to be movable in the radial direction with respect to the brake drum, and the braking member is operated based on the swinging motion of the tension arm in the proximity direction. A push rod that pushes the member toward the brake drum; and a buffer biasing member that biases the push rod toward the brake member.
[0010]
More preferably, a cover attached to the gantry member so as to surround the brake drum and the braking member can be provided.
The cover is provided with an opening that allows the brake member to be operated by the push rod.
Further, the braking member may have a brake pad on a surface facing the brake drum.
[0011]
  In order to achieve the above object, the present invention provides a gantry member having a support wall, and a paper tube drum mounted on the support wall so as to be relatively rotatable so as to extend to one side and the other side of the support wall. A paper tube drum that supports a paper tube body formed by winding a long heat-weldable sheet in a roll shape on the one surface side of the support wall so as not to be relatively rotatable, and supported by the paper tube drum. Drive means for feeding out the heat-weldable sheet from the paper tube, and the other side of the support wall so as to be able to swing in a proximity direction close to the paper tube drum and a separation direction separate from the paper tube body. A tension arm supported in a swingable manner by a gantry member, a tension urging member that urges the tension arm in the proximity direction, and a conveyance path of the heat-weldable sheet fed by the driving means. And A tension bar supported by the tension arm in a state of being inserted into a guide groove provided in a wall, wherein the tension arm is urged by the tension force applied to the heat-weldable sheet by the driving means. A tension bar engaged with the heat-weldable sheet so as to swing in the separation direction against the biasing force of the member, heat-sealing means for heat-sealing the heat-weldable sheet, and the support A brake drum supported on the other side of the wall so as not to rotate relative to the paper tube drum;It is movable on the other surface of the support wall so that it can move in the radial direction of the brake drum so as to be able to contact and separate in the radial direction with respect to the brake drum, and cannot move in the circumferential direction of the brake drum. A braking member that is supported and has a surface facing the outer peripheral surface of the brake drum as a concave surface corresponding to the outer peripheral surface of the brake drum; and the braking member when the tension arm is swung in the proximity direction A pushing member supported by the tension arm so as to push toward the brake drumA heat seal device comprising:
[0012]
  GoodPreferably, a separating biasing member that biases the braking member in a direction away from the brake drum is provided.
[0013]
  in frontThe pressing member is a push rod supported by the tension arm so as to be movable in the radial direction of the brake drum, and the braking member is moved based on the swinging motion of the tension arm in the proximity direction. A push rod that pushes toward the brake drum and a buffer biasing member that biases the push rod toward the braking member may be included.
[0014]
More preferably, a cover that is attached to the other surface of the support wall so as to surround the brake drum and the braking member may be further provided.
The cover is provided with an opening that allows the brake member to be operated by the push rod.
[0015]
Furthermore, the present invention provides a medicine packaging device including the heat sealing device according to any one of the above aspects and a medicine dispensing device that divides and supplies medicine.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
Hereinafter, a preferred embodiment of a heat sealing apparatus according to the present invention will be described with reference to the accompanying drawings. In the present embodiment, a case where the heat sealing apparatus 1 is incorporated in the medicine packaging apparatus 100 and used will be described as an example.
FIG. 1 is a partial perspective view of the heat seal device 1 in a state of being incorporated in the medicine packaging device 100.
[0017]
The medicine packaging device 100 includes the heat seal device 1 and a medicine distribution device 200 that supplies powder and / or tablets.
The heat sealing device 1 feeds out the heat-weldable sheet 300 from a paper tube 310 formed by winding a long heat-weldable sheet 300 in a roll shape, and supplies a predetermined amount of medicine supplied from the medicine distributor 200. Are configured to be individually packaged.
[0018]
FIG. 2 is a view taken in the direction of arrow II in FIG. FIG. 2 shows a state where the heat-weldable sheet 300 is conveyed by the following driving means.
As shown in FIGS. 1 and 2, the heat sealing apparatus 1 includes a gantry member 10 having a support wall 11, and a support wall 11 that extends to one side 11 a and the other side 11 b of the support wall 11. A paper tube drum 20 mounted so as to be relatively rotatable, a drive means (not shown) for feeding out the heat-weldable sheet 300 from a paper tube body 310 supported by the paper tube drum 20, and a paper tube drum 20 The paper tube in a proximity direction on one side of the adjacent swinging direction (clockwise direction in FIG. 2) and in a spacing direction on the other side of the swinging direction away from the paper tube body (counterclockwise direction in FIG. 2). The tension arm 30 supported by the gantry member 10 on the other surface side 11b of the support wall 11 so as to be able to swing around a swing shaft 30a parallel to the rotation axis of the drum 20, and the tension arm 30 in the proximity. A tension urging member 40 urging in the direction, a tension bar 50 inserted in a conveyance path of the heat-weldable sheet 300 fed out by the driving means, and heat for heat-sealing the heat-weldable sheet 300 Sealing means 60.
[0019]
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 said paper tube body 310, and is provided in the said heat seal apparatus 1 as needed or desired.
Reference numeral 13 in the drawing is a guide member for preventing the tension arm 30 from moving in the direction along the swing shaft 30a. The guide 13 is attached to the heat seal device 1 as necessary or desired. Provided.
[0020]
In the present embodiment, the paper tube drum 20 is configured to support the paper tube body 310 on the one surface side 11 a of the support wall 11 so as not to be relatively rotatable.
The tension bar 50 is inserted into a guide groove 15 formed in the support wall 11, and a base end portion is connected to the tension arm 30 on the other surface side 11 b of the support wall 11 and is a free end. The portion engages with the heat-weldable sheet 300 on the one surface side 11 a of the support wall 11.
[0021]
That is, the tension bar 50 is swung in the separation direction against the urging force of the tension urging member 40 by the tensile force applied to the heat-weldable sheet 300 by the driving means. In this manner, the heat-weldable sheet 300 is engaged.
[0022]
Here, the operation of the tension bar 50 and the tension arm 30 in the operating state of the driving unit (the state in which the heat-weldable sheet is conveyed by the driving unit) will be described with reference to FIG.
[0023]
As described above, when the heat-weldable sheet 300 is conveyed by the driving unit, the tension force applied to the heat-weldable sheet 300 by the drive unit resists the biasing force of the tension biasing member 40 and the tension arm. Thus, the tension arm 30 and the tension bar 50 are positioned at the transfer position shown in FIG.
[0024]
As described above, the heat sealing apparatus 1 according to the present embodiment is configured to convey the heat-weldable sheet 300 in a state where the tensile force by the driving means in the operating state and the urging force by the tension urging member 40 are balanced. Thus, the fluctuation of the tension of the heat-weldable sheet 300 during conveyance is prevented as much as possible, and an accurate sheet feeding operation can be performed.
[0025]
Preferably, the guide groove 15 is configured such that the tension bar 50 and the tension arm 30 can swing to the other side in the swing direction beyond the transport position.
According to such a preferable aspect, fluctuations in tension of the heat-weldable sheet being conveyed can be more reliably prevented.
[0026]
Next, operations of the tension bar 50 and the tension arm 30 in a state where the driving unit stops the conveyance will be described.
FIG. 3 is a view taken in the direction of arrow II in FIG. FIG. 3 shows a state in which the conveyance of the heat-weldable sheet 300 by the driving unit is stopped.
[0027]
When the conveyance of the heat-weldable sheet 300 by the driving unit is stopped, the tensile force is not applied to the heat-weldable sheet 300.
More specifically, while the conveyance is stopped, the heat-weldable sheet 300 is not pulled by the driving unit, but is held by the driving unit (for example, a conveyance roller).
That is, when the conveyance is stopped, the tension arm 30 and the tension bar 50 receive the urging force of the tension urging member 40 in a state where the tension arm 30 and the tension bar 50 are engaged with the heat-weldable sheet 300 held by the driving unit. As a result, it is located at the stop position shown in FIG.
[0028]
Preferably, the guide groove 15 is configured such that the tension bar 50 and the tension arm 30 can swing to one side in the swing direction beyond the stop position.
According to such a preferable aspect, fluctuations in tension of the heat-weldable sheet that is stopped can be more reliably prevented.
[0029]
In addition to the above configuration, the heat seal apparatus 1 includes a brake drum 70 supported on the paper tube drum 20 so as not to rotate relative to the other surface side 11b of the support wall 11, and the tension arm in the proximity direction. A brake mechanism having a braking member 80 for applying a braking force to the brake drum 70 based on the swinging operation is provided, thereby achieving the following effects.
Reference numeral 71 in the drawing is a shaft coupling for connecting the brake drum 70 to the paper tube drum 20 so as not to be relatively rotatable.
[0030]
That is, as described above, when the conveyance of the sheet 300 by the driving unit is stopped, the tension arm 30 swings in the proximity direction from the conveyance position toward the stop position.
The heat sealing apparatus 1 according to the present embodiment is configured such that the braking member 80 is in frictional contact with the brake drum 70 based on the swinging motion of the tension arm 30 in the proximity direction.
Accordingly, when the conveyance of the sheet 300 is stopped, the paper tube drum 20 can be effectively prevented from rotating unexpectedly, and thereby, the “sagging” of the heat-weldable sheet 300 can be prevented.
[0031]
More specifically, when the driving unit is stopped from the operating state of the driving unit shown in FIG. 2, the fed heat-weldable sheet 300 stops while being held by the driving unit. On the other hand, the paper tube drum 20 continues to rotate slightly due to inertial force.
Therefore, unless the inertial rotation of the paper tube drum 20 is stopped, the heat-weldable sheet 300 “sags” between the tension bar 30 and the paper tube body 310. If such “sag” exists, the heat-weldable sheet 300 cannot be maintained at a desired tension immediately after the driving means is operated from the stop state, and as a result, inconvenience such as defective sealing occurs.
The heat sealing apparatus 1 according to the present embodiment has the above-described configuration, so that the braking member 80 applies a braking force to the brake drum 70 in conjunction with the conveyance stop of the driving unit. The rotation due to the inertial force of the tube drum 20 can be effectively prevented, and the “sag” can be prevented.
[0032]
As shown in FIGS. 2 and 3, in the present embodiment, the support wall is configured such that the braking member 80 can move in the radial direction and cannot move in the circumferential direction with reference to the rotation axis of the brake drum 70. 11 is supported on the other surface side 11b, and is further pushed toward the brake drum 70 based on the swinging motion of the tension arm 30 in the proximity direction.
[0033]
Specifically, the braking member 80 is accommodated in a braking member cover 85 provided on the other surface side 11 b of the support wall 11.
That is, the brake member cover 85 includes an inner wall 85a that is close to the outer peripheral surface of the brake drum 70 with respect to the rotation axis of the brake drum 70, and a radially outward direction of the brake drum 70 from the inner wall 85a. And an outer wall 85b positioned on the inner wall 85a and a pair of radial walls 85c extending between corresponding ends of the inner wall 85a and the outer wall 85b.
[0034]
The brake member 80 is directed from the base 81 toward the outer peripheral surface of the brake drum 70 through a base 81 accommodated in the internal space of the brake member cover 85 and an opening 86 provided in the inner wall 85a. And a braking portion 82 that extends.
[0035]
The base 81 has a circumferential width based on the brake drum rotation axis substantially equal to a distance between the pair of radial walls 85c, and a radial width based on the brake drum rotation axis is The distance between the inner wall 85a and the outer wall 85b is shorter than the distance between the inner wall 85a and the outer wall 85b. Thus, the braking member 80 is immovable in the circumferential direction and movable in the radial direction with respect to the brake drum rotating shaft. It is said that.
[0036]
The braking portion 82 has a small diameter with a step portion 83 from the base portion 81.
Preferably, in the braking portion 82, a surface facing the outer peripheral surface of the brake drum 70 is a concave surface corresponding to the outer peripheral surface of the brake drum.
By providing such a concave surface, the contact area between the braking portion 82 and the outer peripheral surface of the brake drum 70 can be increased.
In the present embodiment, the brake portion 82 is provided with a brake pad 82a.
[0037]
More preferably, between the step portion 83 of the braking member 80 and the inner wall 85a of the braking member cover 85, the braking member 80 is attached radially outward with reference to the rotational axis of the brake drum 70. A separating biasing member 88 can be provided.
By providing such a separation biasing member 88, it is possible to effectively prevent the braking member 80 from coming into contact with the brake drum 70 in a state where no external operating force is applied to the braking member 80.
[0038]
The brake mechanism according to the present embodiment is further supported by the tension arm 30 so as to push the braking member 80 toward the brake drum 70 when the tension arm 30 is swung in the proximity direction. The pushing member 75 is provided.
[0039]
The push member 75 is a push rod 76 supported by the tension arm 30 so as to be movable in the radial direction of the brake drum 70 with reference to the brake drum rotation axis, and the push arm 76 of the tension arm 30 A push rod 76 that pushes the braking member 80 toward the brake drum 70 based on a swinging operation in the proximity direction, and a buffer biasing member 77 that biases the push rod 76 toward the braking member 80. And have.
[0040]
By providing such a pressing member 75, it is possible to gradually increase the operating force (pressing force) to the braking member 80 based on the swinging motion of the tension arm 30 in the proximity direction. Abrupt contact with the brake drum 70 can be prevented.
[0041]
In the present embodiment, the pushing member 75 has a pushing member cover 78 attached to the tension arm 30, and the push rod 76 is movably accommodated in the pushing member cover 78. ing.
[0042]
More preferably, the brake mechanism may include a brake cover 95 that surrounds the brake drum 70 and the braking member 80.
By providing such a brake cover 95, it is possible to effectively prevent powdered medicine or the like from entering the frictional contact surface between the braking member 80 and the brake drum 70.
The brake cover 95 is provided with an opening 95a that allows the push rod 76 to operate the braking member 80.
[0043]
The heat sealing apparatus 1 according to the present embodiment further includes a paper breakage detection mechanism 400 in addition to the above-described configuration.
FIG. 4 shows a state of the tension bar 50 and the tension arm 30 when the heat-weldable sheet 300 wound around the paper tube 310 is used up.
[0044]
When the heat-weldable sheet 300 is used up, the tension bar 50 naturally does not engage with the heat-weldable sheet 300. As described above, since the tension arm 30 is constantly urged in the proximity direction by the tension urging member 40, the tension bar 50 and the tension arm are used when the heat-weldable sheet 300 is used up. As shown in FIG. 4, 30 is swung to one end position (paper cut position) in the swinging direction of the swingable range defined by the guide groove 15.
[0045]
The out-of-paper detection mechanism 400 is configured to detect the swinging motion of the tension bar 50 and the tension arm 30.
Specifically, the paper break detection mechanism 400 includes a paper break switch 410 that engages with the tension arm 30 only when the tension arm 30 is located at the paper break position shown in FIG.
[0046]
As described above, the paper breakage detection mechanism 400 is configured such that the tension bar 50 and the tension arm 30 that are constantly urged to one side in the swinging direction are on the other side in the swinging direction when the heat-welding sheet 300 is conveyed by the driving unit. A heat seal device that is located at a conveyance position (see FIG. 2) and is located at a stop position (see FIG. 3) on one side of the swinging direction when conveyance of the heat-weldable sheet 300 by the driving unit is stopped. The tension bar 50 and the tension arm 30 are configured to detect that the tension bar 50 and the tension arm 30 are further swung to one side in the swing direction beyond the stop position.
[0047]
The swinging of the tension bar 50 and the tension arm 30 to one side in the swinging direction beyond the stop position causes the heat-weldable sheet 300 to be used up and the heat-weldable sheet 300 and the tension bar 50 to be swung. Therefore, it is possible to reliably detect exhaustion of the heat-weldable sheet 300 by providing the paper breakage detection mechanism 400, whereby the heat-weldable sheet 300 has already been removed. Even if it does not exist, it is possible to effectively prevent a packaging error such that only a medicine is supplied.
[0048]
In the present embodiment, the braking member 80 is a separate member from the tension arm 30, but it is also possible to integrate the braking member with the tension arm 30 instead.
That is, as long as a braking force is applied to the brake drum 70 based on the swinging motion of the tension arm 30 in the proximity direction, the braking member can take various forms.
For example, the surface of the tension arm 30 facing the brake drum 70 itself can be used as the braking member, or a brake pad or the like attached to the tension arm 30 can be used as the braking member.
[0049]
Embodiment 2. FIG.
Hereinafter, another embodiment of the heat sealing apparatus according to the present invention will be described with reference to FIGS. 5 and 6.
The heat sealing apparatus according to the present embodiment has the same configuration as the heat sealing apparatus according to the first embodiment except for the members related to the paper breakage detection mechanism 400.
Therefore, in the present embodiment, the same reference numerals are used for the same or corresponding members as in the first embodiment, and the description thereof is omitted.
[0050]
5 and 6 are diagrams corresponding to the view taken along the arrow II in FIG. 1, and are schematic views in which only members related to the paper breakage detection mechanism are extracted. 5 and 6 show a stopped state of the driving means and a paper out state in which the heat-weldable sheet is used up.
[0051]
As shown in FIGS. 5 and 6, the heat sealing apparatus 1 ′ according to the present embodiment has a tension arm 30 ′ instead of the tension arm 30.
The tension arm 30 ′ has a base end portion that is supported by the support wall 11 so as to be swingable around the swing shaft 30a, and is swingable in only one direction with respect to the arm body 31 ′. Arm connecting portion 35 '.
[0052]
More specifically, the arm main body 31 ′ is always attached to one side of the swinging direction (the clockwise direction in FIGS. 5 and 6) by the tension urging member 40, similarly to the tension arm 30 in the first embodiment. It is energized.
[0053]
The arm connecting portion 35 ′ is a member that supports the tension bar 50, and is separate from the arm main body 31 ′.
Specifically, the arm connecting portion 35 'can swing around the pivot shaft 30b' parallel to the swing shaft 30a in one swing direction and cannot swing in the other swing direction. The arm body 31 ′ is connected to the arm body 31 ′.
[0054]
FIG. 7 is a sectional view taken along line VII-VII in FIG.
Specifically, the arm connecting portion 35 ′ includes a base end portion 36 ′ that is swingably connected to the tip end portion of the arm main body 31 ′ around the pivot shaft 30b ′, and the base end portion 36. And a distal end portion 37 ′ extending to the distal end side and supporting the tension bar 50.
[0055]
As shown in FIG. 7, the base end portion 36 ′ includes a pair of side surfaces 36 a ′ that is swingably supported by the pivot shaft 30 b ′, and the pair of side surfaces 36 a ′ on the other side in the swing direction of the tension arm 30 ′. It has a U-shaped cross section having an abutment surface 36b 'for connecting the side surfaces 36a'.
[0056]
The abutment surface 36b ′ is configured to abut on the tip end portion of the arm body 31 ′, so that the arm connection portion 35 ′ is moved to one side in the swing direction with respect to the arm body 31 ′. It can swing, but cannot swing to the other side in the swing direction.
[0057]
Furthermore, the heat sealing apparatus according to the present embodiment has a guide groove 15 ′ instead of the guide groove 15.
The guide groove 15 ′ includes a curvature portion 16 ′ that guides the tension bar 50 when the tension arm 30 ′ swings between the transport position and the stop position, and a swing direction from the curvature portion 16 ′. And a deflecting portion 17 ′ that deflects and extends downward on one side.
[0058]
The heat sealing apparatus having such a configuration operates as follows.
That is, when the driving unit stops the conveyance while sandwiching the heat-weldable sheet 300, the tension bar 50 and the tension arm 30 'are positioned at the stop position.
At this time, as shown in FIG. 5, the tension bar 50 is positioned in the curvature portion 16 'of the guide groove 15'.
[0059]
On the other hand, when the thermal welding sheet is used up, the tension bar 50 and the tension arm 30 ′ are further moved from the stop position to one side in the swinging direction by the urging force of the tension urging member 40. Swing.
At this time, the tension bar 50 moves from the curved portion 16 ′ of the guide groove 15 ′ to the deflecting portion 17 ′, and the movement of the tension bar 50 causes the arm connecting portion 35 ′ to move relative to the arm main body 31 ′. Thus, it swings around the pivot shaft 30b ′ to one side in the swinging direction (FIG. 6).
[0060]
More specifically, when a paper out condition occurs, the arm connecting portion 35 'swings to one side in the swinging direction with respect to the arm body 31' while the arm body 31 'is substantially positioned at the stop position. However, the tension bar 50 moves from the curvature portion 16 ′ to the deflection portion 17 ′.
[0061]
Accordingly, only when the tension bar 50 is moved to the deflecting portion 17 ′ and the arm connecting portion 35 ′ is swung with respect to the arm main body 31 ′, the arm connecting portion 35 ′ is engaged. By disposing the paper cut switch 410, the position of the arm connecting portion 35 'when the conveyance is stopped and the arm when the paper is out of paper without increasing the substantial swing range of the tension arm 30'. The displacement width with respect to the position of the connecting portion 35 ′ can be increased.
Accordingly, it is possible to more reliably detect the paper breakage by the paper break switch 410.
[0062]
【The invention's effect】
As described above, according to the brake mechanism of the present invention, it is possible to reliably apply a braking force to the paper tube drum when the conveyance of the heat-weldable sheet by the driving unit is stopped while having a simple structure.
[0063]
In addition, according to the heat seal device of the present invention, it is possible to prevent a variation in tension acting on the heat-weldable sheet during conveyance of the heat-weldable sheet by the driving means, while having a simple structure, and to drive means. When the conveyance of the heat-weldable sheet is stopped, a braking force can be reliably applied to the paper tube drum.
[Brief description of the drawings]
FIG. 1 is a perspective view of a medicine packaging device in which a heat seal device according to an embodiment of the present invention is incorporated.
FIG. 2 is an arrow view taken along the arrow II in FIG. 1, and shows a state in which a heat-weldable sheet is conveyed by a driving unit.
FIG. 3 is an arrow view taken along the arrow II in FIG. 1, and shows a state in which the conveyance of the heat-weldable sheet by the driving unit is stopped.
4 is an arrow view as viewed along an arrow II in FIG. 1, and shows a state of running out of paper when the heat-weldable sheet is used up.
FIG. 5 is an operation explanatory diagram of a paper breakage detection mechanism in a heat sealing apparatus according to another embodiment of the present invention, and shows a state where conveyance of the heat-weldable sheet is stopped.
FIG. 6 is an operation explanatory diagram of a paper breakage detection mechanism in a heat sealing apparatus according to another embodiment of the present invention, and shows a paper breakage state of a heat-weldable sheet.
FIG. 7 is a cross-sectional view taken along line VII-VII in FIG.
[Explanation of symbols]
1 Heat seal device
10 Mounting member
11 Supporting wall
15 Guide groove
15 'guide groove
16 'curvature part
17 'deflection part
20 paper tube drum
30 Tension arm
30 'tension arm
31 'arm body
35 'arm connection
40 Tension biasing member
50 Tension bar
60 Heat sealing means
70 Brake drum
75 Pushing member
76 push rod
77 Biasing member for cushioning
80 Braking member
88 Biasing member for separation
95 Cover
100 medicine packaging device
410 Out of paper switch

Claims (10)

A paper tube drum mounted on a gantry member so as to be relatively rotatable, a paper tube drum that supports a paper tube body formed by winding a long heat-weldable sheet in a roll shape so as not to be relatively rotatable, and the paper tube A driving means for feeding out the heat-weldable sheet from the paper tube supported by the drum; and the gantry member so as to be able to swing in a proximity direction close to the paper tube drum and a separation direction separate from the paper tube body. A tension arm supported in a swingable manner, a tension urging member that urges the tension arm in the proximity direction, and the tension so as to be inserted into a conveyance path of the heat-weldable sheet fed out by the driving means. A tension bar supported by the arm, wherein the tension arm is biased by the tension biasing member by a tensile force applied to the heat-weldable sheet by the driving means. A tension bar that engages with the heat-weldable sheet so that the heat-weldable sheet swings against the separation direction, and heat-sealing means for heat-sealing the heat-weldable sheet, and the heat-weldable sheet A brake mechanism applied to a heat seal device that forms individually partitioned packages from
A brake drum supported on the paper tube drum so as not to rotate relatively;
It is supported by the gantry member so as to be movable in the radial direction of the brake drum so as to be able to contact and separate in the radial direction with respect to the brake drum, and not to move in the circumferential direction of the brake drum. A braking member whose surface facing the outer peripheral surface of the brake drum is a concave surface corresponding to the outer peripheral surface of the brake drum;
And a brake member supported by the tension arm so as to push the brake member toward the brake drum when the tension arm is swung in the proximity direction. mechanism. The brake mechanism according to claim 1 , further comprising a separation biasing member that biases the braking member in a direction away from the brake drum. The pushing member is a push rod supported by the tension arm so as to be movable in a radial direction with respect to the brake drum, and the braking member is operated based on a swinging operation of the tension arm in the proximity direction. A push rod that pushes the member toward the brake drum;
The brake mechanism according to claim 1 , further comprising a buffering biasing member that biases the push rod toward the braking member. A cover attached to the gantry member so as to surround the brake drum and the braking member;
The brake mechanism according to claim 3 , wherein the cover is provided with an opening that allows the push rod to be operated to the braking member. The brake mechanism according to any one of claims 1 to 4 , wherein the brake member has a brake pad on a surface facing the brake drum. A frame member having a support wall;
A paper tube drum which is mounted on the support wall so as to be relatively rotatable so as to extend to one side and the other side of the support wall, and is a paper tube formed by winding a long heat-weldable sheet in a roll shape A paper tube drum that supports the body on one side of the support wall in a relatively non-rotatable manner;
Driving means for feeding out the heat-weldable sheet from the paper tube supported by the paper tube drum;
A tension arm swingably supported by the gantry member on the other surface side of the support wall so as to be able to swing in a proximity direction close to the paper tube drum and a separation direction away from the paper tube body;
A tension biasing member that biases the tension arm in the proximity direction;
A tension bar supported by the tension arm in a state of being inserted into a guide groove provided in the support wall so as to be inserted into a conveyance path of the heat-weldable sheet fed out by the driving means, The tension arm is engaged with the heat-weldable sheet so that the tension arm is swung in the separation direction against the urging force of the tension urging member by a tensile force applied to the heat-weldable sheet by driving means. A tension bar,
Heat sealing means for heat sealing the heat-weldable sheet;
A brake drum supported on the paper tube drum so as not to rotate relative to the other surface of the support wall;
It is movable on the other surface of the support wall so that it can move in the radial direction of the brake drum so as to be able to contact and separate in the radial direction with respect to the brake drum, and cannot move in the circumferential direction of the brake drum. A braking member that is supported and whose surface facing the outer peripheral surface of the brake drum is a concave surface corresponding to the outer peripheral surface of the brake drum;
And a pressing member supported by the tension arm so as to push the braking member toward the brake drum when the tension arm is swung in the proximity direction. Sealing device. The heat seal device according to claim 6 , further comprising a separation biasing member that biases the braking member in a direction away from the brake drum. The push member is a push rod supported by the tension arm so as to be movable in the radial direction of the brake drum, and the brake member is moved based on the swinging motion of the tension arm in the proximity direction. A push rod that pushes toward the brake drum;
The heat seal device according to claim 6 , further comprising a buffering biasing member that biases the push rod toward the braking member. A cover attached to the other surface of the support wall so as to surround the brake drum and the braking member;
The heat seal device according to claim 8 , wherein the cover is provided with an opening that allows the push rod to be operated to the braking member. A heat seal device according to any one of claims 6 to 9 ,
A medicine packaging device, comprising: a medicine dispensing device that divides and supplies medicine.

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