JP7134517B1 - Packaging device and its control method - Google Patents

Abstract

A packaging apparatus and a control method thereof are provided that can prevent defective welding and cutting of packaging materials. A packaging device (100) includes a heat-resistant receiving member (42), a blade (41) which is detachably attached to the receiving member (42), a heater (44) for heating the blade (41), and a heater (44) between the receiving member (42) and the blade (41). A transport path H for transporting two films F1 and F2 with an object to be packaged sandwiched therebetween, a heat absorption position in contact with the heater 44, and a heat transfer position separated from the heater 44 and in thermal contact with the receiving member 42. and the blade 41 is brought close to the receiving member 42 at a distance at which heat can be transferred when the packaging device 100 is initialized, and the pressing member 43 is moved between the heat absorption position and the heat transfer position. and a control unit 50 that moves between and a plurality of times. [Selection drawing] Fig. 3

Description

The present invention relates to, for example, a wrapping apparatus for wrapping newspapers with film and a control method thereof.

A wrapping apparatus for wrapping newspaper with film generally sandwiches the newspaper between films pulled out from two rolls and thermally welds the films around the newspaper. Then, the film is cut at the same time as the heat welding, and the next newspaper loading is awaited.

A mechanism for welding and cutting the film includes, for example, a heating knife and a heat-resistant sponge. When the film is to be welded, the portion of the film to be welded is placed between the heating knife and the sponge, and the heating knife heated to the melting temperature of the film is pressed against the sponge through the film. As a result, the film is cut at the same time as the film is welded.

JP-A-8-143008

When the film is welded immediately after the initializing operation of the packaging machine, the heating knife heated to the melting temperature of the film thermally contacts the sponge at approximately the same temperature as the ambient temperature. When the outside temperature is low, such as in winter, a large amount of heat escapes from the heating knife to the sponge due to the large temperature difference between the heating knife and the sponge.

In this case, even if the heating knife is heated to the melting temperature of the film by the initializing operation, the temperature of the heating knife may drop below the melting temperature of the film, resulting in incomplete welding of the film. , the film cannot be cut cleanly.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a packaging apparatus and a method of controlling the same that can prevent poor welding and cutting of packaging materials.

One aspect of the packaging apparatus of the present invention includes a heat-resistant receiving member, a blade that is separably attached to the receiving member, a heater that heats the blade, and an object to be packaged that is passed between the receiving member and the blade. and a heat transfer member movably provided between a heat absorption position in contact with the heater and a heat transfer position separated from the heater and in thermal contact with the receiving member. and a control unit that brings the blade close to the receiving member at a heat-transferable distance and moves the heat-transfer member between the heat-absorbing position and the heat-transfer position a plurality of times when the packaging apparatus is initialized.

One aspect of the packaging apparatus of the present invention includes a heat-resistant receiving member, a blade that is separably attached to the receiving member, a heater that heats the blade, and an object to be packaged that is passed between the receiving member and the blade. and a heat transfer member movably provided between a heat absorption position in contact with the heater and a heat transfer position separated from the heater and in thermal contact with the receiving member. and a controller that moves the heat transfer member between the heat absorption position and the heat transfer position a plurality of times during the initialization operation of the packaging apparatus.

One aspect of the packaging apparatus of the present invention includes a heat-resistant elastic member, a blade that is separably attached to the elastic member, a heater that heats the blade, and an object to be packaged that is passed between the elastic member and the blade. A heat transfer member provided movably between a heat absorption position in contact with the blade and a heat transfer position separated from the blade and in thermal contact with the elastic member. and a control unit for moving the blade between the heat absorbing position and the heat transferring position a plurality of times while the blade is brought close to the elastic member at a heat transferable distance when the packaging apparatus is initialized.

One aspect of the packaging apparatus of the present invention includes a heat-resistant elastic member, a blade that is separably attached to the elastic member, a heater that heats the blade, and an object to be packaged that is passed between the elastic member and the blade. A heat transfer member provided movably between a heat absorption position in contact with the blade and a heat transfer position separated from the blade and in thermal contact with the elastic member. and a controller that moves the heat transfer member between the heat absorption position and the heat transfer position a plurality of times during the initialization operation of the packaging apparatus.

In the control method of the packaging apparatus of the present invention, the two packaging materials sandwiching the object to be packaged are pressed against the receiving member by a heated blade, and the object to be packaged is wrapped by the two packaging materials by welding and cutting. A method for controlling a packaging device comprising: heating the blade; bringing the blade close to a receiving member at a distance that allows heat transfer; and a heat transfer step of moving the heat transfer member a plurality of times between a heat transfer position in thermal contact with the receiving member, and transferring heat until the blade reaches the melting temperature of the packaging material when the packaging device is initialized. Repeat the thermal process.

In the control method of the packaging apparatus of the present invention, the two packaging materials sandwiching the object to be packaged are pressed against the receiving member by a heated blade, and the object to be packaged is wrapped by the two packaging materials by welding and cutting. A method for controlling a packaging machine comprising: heating the blade; heat transfer between a heat absorption position where the blade is in contact with a heater for heating the blade and a heat transfer position where the blade is separated from the heater and is in thermal contact with a receiving member. and a heat transfer step of moving the member a plurality of times, and the heat transfer step is repeated until the blade reaches the melting temperature of the packaging material during the initialization operation of the packaging device.

A method of controlling a packaging apparatus according to the present invention involves packaging an object to be packaged with two packaging materials by pressing two packaging materials sandwiching an object between them against an elastic member with a blade to weld and cut the packaging material. A method for controlling an apparatus, comprising the steps of: heating the blade; bringing the blade close to the elastic member at a heat-transferable distance; and a heat transfer step of moving the heat transfer member a plurality of times between the heat transfer positions where the heat transfer member is located, and the heat transfer step is repeated until the blade reaches the melting temperature of the packaging material during the initialization operation of the packaging device.

A method of controlling a packaging apparatus according to the present invention involves packaging an object to be packaged with two packaging materials by pressing two packaging materials sandwiching an object between them against an elastic member with a blade to weld and cut the packaging material. A method of controlling an apparatus, comprising heating the blade and moving the heat transfer member multiple times between a heat absorption position in contact with the blade and a heat transfer position away from the blade and in thermal contact with the elastic member. and a heat transfer step, wherein the heat transfer step is repeated until the blade reaches the melting temperature of the packaging material during the initialization operation of the packaging device.

ADVANTAGE OF THE INVENTION According to one aspect of the present invention, it is possible to provide a packaging apparatus and a control method thereof that can prevent poor welding and poor cutting of packaging materials.

FIG. 1 is an external perspective view showing a packaging device according to an embodiment of the invention. 2 is a schematic diagram showing the internal structure of the packaging apparatus of FIG. 1. FIG. 3 is a perspective view showing a main part of the packaging apparatus of FIG. 1. FIG. FIG. 4 is a cross-sectional view of the main part of FIG. 3 taken along F4-F4. FIG. 5 is a schematic diagram showing a state in which the pressing member of the welding/cutting portion of FIG. 4 is rotated to the heat absorption position. FIG. 6 is a schematic diagram showing a state in which the pressing member of FIG. 5 is rotated to the heat transfer position and the blade is pressed against the receiving member. FIG. 7 is a block diagram showing a control system for controlling the operation of the welding/cutting section shown in FIG. FIG. 8 is a flow chart for explaining the initializing operation of the welding/cutting portion of FIG.

A packaging device 100 according to an embodiment of the present invention will be described below with reference to the drawings. In each figure, the direction indicated by the arrow X is the rear, and the direction opposite to the X direction is the front. In each figure, the direction indicated by arrow Y is the right direction, and the direction opposite to arrow Y is the left direction. In each figure, the direction indicated by arrow Z is upward, and the direction opposite to arrow Z is downward. That is, in the following description, the front-back direction, the left-right direction, and the up-down direction are defined when the packaging device 100 is viewed from the arrow X direction.

As shown in FIG. 1, the packaging device 100 has a substantially rectangular box-shaped housing 101 that forms the outer shell of the device. The housing 101 has an opening on its upper side that opens the upper part of the packaging device 100 widely. The housing 101 has a top plate 102 for opening and closing this opening. The top plate 102 is provided rotatably via a hinge (not shown) provided at the rear of the housing 101 . The top plate 102 has a handle 102a to be gripped by an operator at the front end spaced from the hinge. The top plate 102 can be opened and closed between a closed position shown and an open position not shown.

The top plate 102 has a slit-like input port 103 for inputting the package P (see FIG. 2). The inlet 103 is an opening having a size and a shape that allows the article to be packaged P to be inserted. As the package P, for example, there is a newspaper in which a plurality of sheets of newspaper are piled up and folded. In addition, the package P includes a booklet, a flat box, and the like. The inlet 103 extends in the lateral direction of the packaging apparatus 100 and may be provided with a shutter or the like for opening and closing the inlet 103 .

An operation/display panel 104 is provided on the upper surface of the housing 101 on the right side of the input port 103 to receive various operation inputs from the operator and to display various operation guides to the operator. A power switch 105 is provided on the front right side of the housing 101 .

Below the housing 101, a discharge tray 106 is provided for receiving a package W (not shown) in which the package P is wrapped with the films F1 and F2 (FIG. 2). The discharge tray 106 has casters on the bottom, and can be arranged in the illustrated state of being housed inside the housing 101 and the unillustrated state of being pulled forward from the housing 101 . The housing 101 has casters 107 at its bottom for movement.

As shown in FIG. 2, inside the housing 101, there are a roll R1 in which a long resin film F1 (packaging material) is wound around a cylindrical winding core C1, and a long resin film F2. A roll R2 in which (packaging material) is wound around a cylindrical winding core C2 is accommodated and arranged. The winding cores C1, C2 of the respective rolls R1, R2 have inner diameters that allow the shafts S1, S2 to pass therethrough with a slight amount of play inside. Both ends of the shafts S1 and S2 are supported so as to be vertically movable with respect to the housing 101 via a support mechanism (not shown).

The shafts S1 and S2 extend in the left-right direction perpendicular to the plane of the paper, and are attached to the housing 1 at positions spaced forward and backward by a distance that the rolls R1 and R2 do not interfere with each other. Specifically, one roll R1 is arranged in front of the inlet 103, and the other roll R2 is arranged behind the inlet 103. As shown in FIG. Rolls R1 and R2 are freely rotatable about axes S1 and S2, respectively. Further, the rolls R1 and R2 can be replaced by removing both ends of the shafts S1 and S2 from the housing 101. As shown in FIG.

The roll R1 on the left side (front) in FIG. 2 is mounted inside the housing 101 so as to rotate clockwise in the drawing when the film F1 is pulled out. The right (rear) roll R2 is mounted in the housing 101 so that it rotates counterclockwise in the drawing when the film F2 is pulled out. The rolls R1, R2 are rotated about the axes S1, S2 by the action of pulling out the films F1, F2.

Support rollers 9a and 9b are provided below the rolls R1 and R2, respectively, for supporting the rolls R1 and R2 from below by bringing the outer peripheral surfaces into contact with the outer peripheral surfaces of the rolls R1 and R2. The rotating shafts of the support rollers 9a and 9b extend in the horizontal direction perpendicular to the plane of the paper. Both ends of the rotation shafts of the support rollers 9 a and 9 b are rotatably attached to the housing 101 .

As described above, each of the rolls R1 and R2 is supported at both ends of the shafts S1 and S2 so as to be vertically movable with respect to the housing 101. Therefore, the respective rolls R1 and R2 are supported by their own weight with respect to the corresponding support rollers 9a and 9b. be pushed. Therefore, the support rollers 9a and 9b are rotatable with respect to the rolls R1 and R2, respectively.

Two guide rollers 2a and 2b extending left and right are provided on the downstream side of the inlet 103 in the direction in which the articles to be packaged P are introduced. The loading direction of the items to be packaged P is the direction of gravity from top to bottom. The guide rollers 2a and 2b guide the films F1 and F2 pulled out from the respective rolls R1 and R2 in the direction of approaching each other and guide them downward.

The guide rollers 2a and 2b are arranged near the inlet 103 so as to be spaced apart from each other in the front-rear direction by an interval that is larger than the thickness of the package P and slightly narrower than the width of the inlet 103 in the front-rear direction. The films F1 and F2 guided between the guide rollers 2a and 2b are drawn downward. The package P loaded into the housing 101 through the loading port 103 is passed between the two films F1 and F2. At approximately the center in the left-right direction within the housing 101, a transport path H is provided that passes between the guide rollers 2a and 2b and reaches the discharge tray 106. As shown in FIG.

Guide plates 3a and 3b extending substantially parallel to the drawing direction are provided on the downstream side of the guide rollers 2a and 2b along the drawing direction of the films F1 and F2. One of the guide plates 3a arranged in front of the film F1 is arranged to face the rear surface side opposite to the surface of the film F1 facing the passage of the articles P to be packaged. The other guide plate 3b, which is arranged behind the film F2, is arranged to face the rear surface side opposite to the surface of the film F2 facing the passage of the articles P to be packaged. The guide plates 3a and 3b orient the leading ends of the films F1 and F2 in the drawing direction between the blade 4a and the receiving member 4b of the welding/cutting section 4, which will be described later, and function to suppress the fluttering of the films F1 and F2. .

Further downstream of the guide plates 3a and 3b along the drawing direction of the films F1 and F2, a welding/cutting section 4 for welding and cutting the two films F1 and F2 is provided. The welding/cutting unit 4 includes a blade 41 arranged in front of the film F1 drawn downward from the roll R1 and a receiving member 42 arranged behind the film F2 drawn downward from the roll R2 facing the blade 41. , and a pressing member 43 (heat transfer member) disposed above the blade 41 in front of the film F1. The blade 41, the receiving member 42, and the pressing member 43 have lengths exceeding at least the lateral widths of the films F1 and F2.

When the pressing member 43 is rotated toward the receiving member 42, the two films F1 and F2 are pressed against the receiving member 42. As shown in FIG. When the blade 41 is moved rightward (rearward) toward the support member 42 from the position shown in the figure, the two films F1 and F2 are sandwiched between the blade 41 and the support member 42 and come into contact with each other. The two films F1 and F2 are welded together. When the package W on the downstream side of the welded portion of the films F1 and F2 is conveyed downward, the films F1 and F2 are torn off at substantially the center position in the vertical direction of the welded portion.

As a result, the rear ends of the two films F1 and F2 of the package W that have passed through the welding/cutting section 4 are welded to each other in the drawing direction, and the two films F1 on the upstream side of the welding/cutting section 4 are welded along the drawing direction. , F2 are welded to each other in the drawing direction. After moving the blade 41 to the home position away from the receiving member 42, the leading ends of the two films F1 and F2 on the upstream side of the welding/cutting section 4 in the drawing direction are positioned on one surface of the receiving member 42 on the transport path H side. Stick to 42a.

A sensor 5 for detecting passage of the package P is provided on the upstream side of the welding/cutting section 4 and the downstream side of the guide plates 3a and 3b along the drawing direction of the films F1 and F2. A sensor 6 for detecting the passage of the package P is provided on the downstream side of the welding/cutting section 4 along the drawing direction of the films F1 and F2. The sensors 5 and 6 are transmissive photoelectric sensors each having a light-emitting element and a light-receiving element on both front and rear sides of the conveying path of the item P to be packaged.

That is, the sensor 5 is arranged upstream of the welding/cutting section 4 so that its light beam crosses the conveying path of the packaged item P, and the sensor 6 is arranged downstream of the welding/cutting section 4 so that its light beam It is arranged at a position that crosses the transport path of In addition, since the light beams of the sensors 5 and 6 pass through the films F1 and F2, passage of the package P sandwiched between the films F1 and F2 can be detected. The sensors 5 and 6 may be reflective photoelectric sensors that detect light reflected by the package P.

Further downstream of the sensor 6 in the direction in which the films F1 and F2 are pulled out, the laminated body T in which the object to be packaged P is sandwiched between the two films F1 and F2 is sandwiched and restrained, and is transported through the transport path H. A transport mechanism 8 is arranged for transporting in the pull-out direction. The transport mechanism 8 has transport units 8F and 8R having substantially the same structure on the front and rear sides of the transport path H for the stacked body T (both left and right sides in the figure).

A transport unit 8F in front of the transport path H for the stack T (on the left side in the figure) has a structure in which an endless transport belt 8c is wound around a drive roller 8a and a driven roller 8b that are separated from each other in the direction of gravity. The rotation shafts of the driving roller 8a and the driven roller 8b extend in a direction perpendicular to the plane of the paper. The conveying unit 8F is arranged at a position where the conveying belt 8c travels in contact with the left surface of the laminate T (back surface of the film F1) in the drawing.

The transport unit 8R behind the transport path H of the laminate T (on the right side in the drawing) is on the opposite side of the stack T with respect to the transport unit 8F, and the transport belt 8c touches the surface of the laminate T on the right side in the figure (the back surface of the film F2). ) is positioned to run in contact with the The transport unit 8R may be connected to the drive shaft of the transport unit 8F via a pulley or timing belt (not shown), and is driven synchronously with the transport unit 8F.

The running direction of the transport belt 8c of the transport unit 8F is the clockwise direction in FIG. 2, and the running direction of the transport belt 8c of the transport unit 8R is the counterclockwise direction. By driving the transport mechanism 8, the packaged product W transported through the transport path H and wrapped with the films F1 and F2 is transported through the transport path H to the discharge tray 106 arranged below the housing 101. discharged towards. The discharge tray 106 sequentially stacks and accommodates the packages W fed through the transport path H. As shown in FIG.

Although illustration and description are omitted here, the packaging apparatus 100 also has a side seal mechanism that seals both the left and right sides of the films F1 and F2 of the laminate T. As shown in FIG. In other words, the package W discharged to the discharge tray 106 is in a state in which the two films F1 and F2 sandwiching the package P are sealed along the entire circumference of the package P. FIG.

The packaging device 100 described above operates as follows.
When the worker inserts the package P through the inlet 103 , the tip of the package P blocks the light beam from the sensor 5 . The packaging apparatus 100 monitors whether or not the light beam of the sensor 5 is blocked by the object to be packaged P, and when the sensor 5 is turned off (the light beam is blocked by the object to be packaged P), the conveying mechanism 8 is activated. to drive. After that, the packaging apparatus 100 monitors the state of the sensor 6 and stops the conveying mechanism 8 when the sensor 6 is turned ON (the light receiving section receives the light). In this state, the stack T is held and restrained by the conveying mechanism 8 and stopped.

After that, the packaging apparatus 100 moves the blade 41 of the welding/cutting section 4 toward the receiving member 42, and sandwiches the films F1 and F2 between the blade 41 and the receiving member 42 for a certain period of time, above the laminate T. to seal. At this time, the packaging apparatus 100 operates a side seal mechanism (not shown) to seal the left and right ends of the films F1 and F2.

Further, after that, the packaging device 100 drives the transport mechanism 8 to discharge the packaged product W toward the discharge tray 106 .

Here, the structure of the welding/cutting portion 4 described above will be described in more detail with reference to FIGS. 3 to 6. FIG. 3 and 4, the films F1 and F2 unwound from the respective rolls R1 and R2 are omitted for clarity of illustration.
The welding/cutting section 4 includes the blade 41, the receiving member 42, and the pressing member 43, which extend in the lateral direction of the packaging device 100, as described above.

The blade 41 has a shape obtained by bending a long aluminum plate along its longitudinal direction into a substantially L-shaped cross section, and has an edge 41a on the rear end side facing the receiving member 42 (hereinafter referred to as a leading edge 41a). is tapered so that its plate thickness gradually decreases. The blade 41 is attached to the receiving member 42 via a support member (not shown) so as to be movable in the front-rear direction.

The blade 41 has a heater 44 on its upper surface. The heater 44 is provided over substantially the entire length of the blade 41 . By energizing the heater 44, the blade 41 can be heated to the melting temperature of the films F1 and F2. The blade 41 has a temperature sensor 45 based on a thermocouple, for example, on a portion of its lower surface side. A temperature sensor 45 detects the temperature of the blade 41 .

The receiving member 42 is formed of a heat-resistant rubber material or the like which is elastically deformable when the tapered tip edge 41a of the blade 41 is pushed. The receiving member 42 is in the shape of an elongated rectangular block. The receiving member 42 is fixed to a frame (not shown) of the packaging apparatus 100 via a supporting member 42b such that one surface 42a facing the conveying path H faces the leading edge 41a of the blade 41. As shown in FIG.

The pressing member 43 is made of a metal that easily conducts heat, such as aluminum, and is formed into a plate shape. The pressing member 43 has a rotating shaft 43a extending in the left-right direction at its proximal end, and a heat transfer position (position shown in FIGS. 3, 4, and 6) where the rotating tip 43b is pressed against the one surface 42a of the receiving member 42. , and a heat absorption position (position shown in FIG. 5) where the tip 43b contacts the heater 44 so as to be rotatable. In other words, the rotating shaft 43a of the pressing member 43 is attached at a position where the tip 43b can come into contact with the heater 44 and the receiving member 42 while the pressing member 43 is rotating. The pressing member 43 presses the two films F1 and F2 against the one surface 42a of the receiving member 42 in the heat transfer position shown in FIG.

The tip 43b of the pressing member 43 may come into contact with the blade 41 when the pressing member 43 is arranged at the heat absorption position shown in FIG. FIG. 6 shows a state in which the tip 43b of the pressing member 43 is separated from the heater 44 and pressed against one surface 42a of the receiving member 42, and the tip edge 41a of the blade 41 is pressed against the one surface 42a of the receiving member 42. FIG.

As shown in FIG. 7 , the packaging device 100 includes a control section 50 that controls the operations of the blade 41 and the pressing member 43 of the welding/cutting section 4 . The power switch 105 , the operation/display panel 104 , and the temperature sensor 45 are connected to the controller 50 .

The control unit 50 also includes a heater 44 for heating the blade 41, a stepping motor 52 for moving the blade 41 in a direction away from and contacting the receiving member 42, and a pressing member 43 at the heat absorption position described above. A solenoid 54 is connected for rotating between thermal positions.

The stepping motor 52 has a position where the tip edge 41a of the blade 41 is pressed against the one surface 42a of the receiving member 42, a position where the tip edge 41a of the blade 41 is slightly (for example, about 5 mm) away from the one surface 42a of the receiving member 42, The blade 41 is moved to a position where the blade 41 is retracted to the home position away from the conveying path H.

By energizing the solenoid 54 , the pressing member 43 is arranged at the heat transfer position, and the tip 43 b contacts the one surface 42 a of the receiving member 42 . When the solenoid 54 is de-energized, the pressing member 43 is placed at the heat absorption position and its tip 43b contacts the heater 44. As shown in FIG.

4 to 7 and the flow chart shown in FIG. 8, the initializing operation of the welding/cutting section 4 will be described below. The initialization operation of the welding/cutting section 4 is performed only once when the power switch 105 of the packaging apparatus 100 is turned on or when the packaging apparatus 100 is initialized.

For example, when the power switch 105 of the packaging apparatus 100 is turned on by the user, the initialization operation is started, and the control unit 20 first controls the stepping motor 52 to bring the blade 41 closer to the one surface 42a of the receiving member 42. position (FIG. 8, step 1). At this time, the controller 50 brings the blade 41 closer to the receiving member 42 until the distance between the tip edge 41a of the blade 41 and the one surface 42a of the receiving member 42 becomes approximately 5 mm, for example. This distance is not limited to 5 mm as long as it is a distance that allows the heat of the blade 41 to be transferred to the receiving member 42 (heat transferable). This state is shown in FIG.

When the tip edge 41a of the blade 41 is brought close to the one surface 42a of the support member 42 in step 1, the films F1 and F2 may exist between the tip edge 41a of the blade 41 and the one surface 42a of the support member 42 in some cases. For this reason, in the present embodiment, the solenoid 54 is energized so that the films F1 and F2 do not come into contact with the leading edge 41a of the blade 41 while the leading edge 41a of the blade 41 is brought close to the one surface 42a of the receiving member 42. The films F1 and F2 are pressed against the receiving member 42 by the tip 43b of the pressing member 43. - 特許庁

In step 1, the blade 41 is brought close to the receiving member 42 by a heat-transferable distance (the state shown in FIG. 4), the controller 50 turns on the heater 44 to start heating the blade 41 (step 2). After that, the control unit 50 monitors the output of the temperature sensor 45 until the initialization operation is finished. When the heater 44 is turned on in step 2, the blade 41 is heated and temperature rise is started, and the heat from the blade 41 is also applied to the receiving member 42 which is close to the tip edge 41a of the blade 41 within a heat transferable distance. is transmitted, and the temperature of the receiving member 42 also starts to rise.

If, in step 1, the distance to bring the tip edge 41a of the blade 41 closer to the one surface 42a of the receiving member 42 is shortened (from 5 mm), the effect of raising the temperature of the receiving member 42 can be enhanced. However, when the films F1 and F2 are present between the leading edge 41a of the blade 41 and the one surface 42a of the support member 42, the possibility of the films F1 and F2 contacting the leading edge 41a of the blade 41 increases. For this reason, it is necessary to set an appropriate value for the distance by which the tip edge 41a of the blade 41 is brought closer to the one surface 42a of the receiving member 42 .

After step 2, in order to raise the temperature of the receiving member 42, the control unit 50 turns the solenoid 54 ON/OFF a plurality of times to move the pressing member 43 between the above-described heat absorption position (step 4) and the above-described heat transfer position (step 4). and step 5). FIG. 5 shows a state in which the pressing member 43 is arranged at the heat absorption position, and FIG. 6 shows a state in which the pressing member 43 is arranged at the heat transfer position. At this time, the control unit 50 monitors the temperature of the blade 41 via the temperature sensor 45, and keeps the pressing member 43 until the temperature of the blade 41 reaches the melting temperature of the films F1 and F2 (YES in step 3). (steps 4 and 5) are repeated. In the present embodiment, the temperature (target temperature) at which the reciprocation of the pressing member 43 ends is set to the melting temperature of the films F1 and F2, but the target temperature may be other than the melting temperature.

In step 4, when the pressing member 43 is placed at the heat absorption position and its tip 43b is brought into contact with the heater 44 (or the blade 41), the heat of the heater 44 is also transmitted to the pressing member 43, and the pressing member 43 is heated. Then, immediately after step 4, when the tip 43b of the holding member 43 placed at the heat transfer position in step 5 is brought into contact with one surface 42a of the receiving member 42, the heat transferred to the holding member 43 in step 4 is applied to the receiving member. 42 and the receiving member 42 is heated. The temperature of the receiving member 42 can be increased until it reaches the same temperature as the pressing member 43 .

As steps 4 and 5 are repeated, the temperature of the receiving member 42 is gradually increased, and when the blade 41 is heated to the melting temperature of the films F1 and F2 (step 3; YES), the receiving member 42 reaches a predetermined temperature. heated. This predetermined temperature is a temperature higher than the environmental temperature at that time and lower than the temperature of the pressing member 43 . The temperature rise of the receiving member 42 is due to heat transfer due to bringing the tip edge 41a of the blade 41 close to the one surface 42a of the receiving member 42 and moving the pressing member 43 a plurality of times. , the predetermined temperature referred to here is, for example, a temperature about 10° C. higher than the ambient temperature.

That is, when the processes of steps 4 and 5 are repeated in the initialization operation as in this embodiment, the temperature of the receiving member 42 can be made higher than when the processes of steps 4 and 5 are not performed. Therefore, for example, when the environmental temperature is low, such as in winter, the initializing operation heats the blade 41 and simultaneously heats the receiving member 42 effectively, thereby reducing the amount of heat that escapes from the blade 41 to the receiving member 42. It is possible to prevent defects such as poor welding and cutting when the films F1 and F2 are welded and cut immediately after the initializing operation.

In the second and subsequent welding/cutting of the films F1 and F2, the blade 41 heated to the melting temperature (for example, about 210° C.) of the films F1 and F2 is already brought into contact with the receiving member 42 once. 42 is sufficiently heated, heat does not escape from the blade 41 to the receiving member 42, and neither welding failure nor cutting failure occurs.

It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made in the implementation stage without departing from the scope of the invention. In addition, various inventions are included in the above-described embodiments, and various inventions can be extracted by combinations selected from a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiments, if the problem can be solved and effects can be obtained, the configuration with the constituent elements deleted can be extracted as an invention.

After the power is turned on to the packaging apparatus 100 installed at a place where the ambient temperature is 25° C., the blade 41 is arranged close to the receiving member 42, and the pressing member 43 is arranged at the heat absorption position and the heat transfer position. One cycle was performed for 30 seconds, and the initializing operation was performed for 3 minutes (6 cycles) for the blade 41 to reach the melting temperature. After the initializing operation, the temperature of the blade 41 was 210°C and the temperature of the receiving member 42 was 35°C. Immediately after the initialization operation, the films F1 and F2 were welded and cut.

For comparison, after the power was turned on to the packaging apparatus 100 installed in a place where the environmental temperature was 25° C., the operation of arranging the pressing member 43 to the heat absorption position and the heat transfer position was not performed, and the blade 41 was moved. The films F1 and F2 were welded and cut after standing by for 3 minutes while being arranged close to the receiving member 42 .

As a result, as in the former case, when the films F1 and F2 are welded and cut after repeating the operation of arranging the pressing member 43 at the heat absorption position and then at the heat transfer position a plurality of times, the films F1 and F2 are not cut. The package P could be neatly packaged without any defective welding or cutting.

On the other hand, as in the latter case, when the films F1 and F2 are welded and cut without arranging the pressing member 43 at the heat absorption position and at the heat transfer position, the welding failure of the films F1 and F2 may occur. In addition, cutting defects occurred, and it was not possible to pack neatly.

4 Welding and cutting portion 41 Blade 41a Tip edge 42 Receiving member 42a One surface 43 Holding member 43a Rotating shaft 43b Tip 44 Heater 45 Temperature sensor 50 Control unit 52 Stepping motor 54 Solenoid F1, F2 Film H Conveying path P Object to be packaged T Laminate.

Claims (10)

a heat-resistant receiving member;
a blade that is detachably attached to the receiving member;
a heater for heating the blade;
a conveying path for conveying two packaging materials sandwiching an object to be packaged between the receiving member and the blade;
a heat transfer member provided movably between a heat absorption position in contact with the heater and a heat transfer position separated from the heater and in thermal contact with the receiving member;
a controller for moving the blade a plurality of times between the heat absorption position and the heat transfer position, and moving the heat transfer member a plurality of times between the heat absorption position and the heat transfer position while bringing the blade close to the receiving member at a heat transferable distance when the packaging apparatus is initialized;
A packaging device having a heat-resistant receiving member;
a blade that is detachably attached to the receiving member;
a heater for heating the blade;
a conveying path for conveying two packaging materials sandwiching an object to be packaged between the receiving member and the blade;
a heat transfer member provided movably between a heat absorption position in contact with the heater and a heat transfer position separated from the heater and in thermal contact with the receiving member;
a control unit that moves the heat transfer member between the heat absorption position and the heat transfer position a plurality of times during the initialization operation of the packaging device;
A packaging device having a heat-resistant receiving member;
a blade that is detachably attached to the receiving member;
a heater for heating the blade;
a conveying path for conveying two packaging materials sandwiching an object to be packaged between the receiving member and the blade;
a heat transfer member provided movably between a heat absorption position in contact with the blade and a heat transfer position spaced apart from the blade and in thermal contact with the receiving member;
a controller for moving the blade a plurality of times between the heat absorption position and the heat transfer position, and moving the heat transfer member a plurality of times between the heat absorption position and the heat transfer position while bringing the blade close to the receiving member at a heat transferable distance when the packaging apparatus is initialized;
A packaging device having a heat-resistant receiving member;
a blade that is detachably attached to the receiving member;
a heater for heating the blade;
a conveying path for conveying two packaging materials sandwiching an object to be packaged between the receiving member and the blade;
a heat transfer member provided movably between a heat absorption position in contact with the blade and a heat transfer position spaced apart from the blade and in thermal contact with the receiving member;
a control unit that moves the heat transfer member between the heat absorption position and the heat transfer position a plurality of times during the initialization operation of the packaging device;
A packaging device having The heat transfer member is a pressing member that presses the two packaging materials against the receiving member.
The packaging device according to any one of claims 1 to 4. The heat transfer member is made of a metal having thermal conductivity,
The packaging device according to any one of claims 1 to 5. A control method for a packaging device in which an object to be packaged is wrapped with two packaging materials by pressing two packaging materials sandwiching an object between them against a receiving member with a heated blade to weld and cut the packaging material. hand,
heating the blade;
a step of bringing the blade close to the receiving member at a heat-transferable distance;
and a heat transfer step of moving a heat transfer member multiple times between a heat absorption position where the blade is in contact with a heater and a heat transfer position where the heat transfer member is separated from the heater and is in thermal contact with the receiving member. ,
repeating the heat transfer step until the blade reaches a melting temperature of the packaging material when the packaging device is initialized;
Control method for packaging equipment. A control method for a packaging device in which an object to be packaged is wrapped with two packaging materials by pressing two packaging materials sandwiching an object between them against a receiving member with a heated blade to weld and cut the packaging material. hand,
heating the blade;
and a heat transfer step of moving a heat transfer member multiple times between a heat absorption position where the blade is in contact with a heater and a heat transfer position where the heat transfer member is separated from the heater and is in thermal contact with the receiving member. ,
repeating the heat transfer step until the blade reaches a melting temperature of the packaging material when the packaging device is initialized;
Control method for packaging equipment. A control method for a packaging device in which an object to be packaged is wrapped with two packaging materials by pressing two packaging materials sandwiching an object between them against a receiving member with a heated blade to weld and cut the packaging material. hand,
heating the blade;
a step of bringing the blade close to the receiving member at a heat-transferable distance;
a heat transfer step of moving a heat transfer member multiple times between a heat absorption position in contact with the blade and a heat transfer position away from the blade and in thermal contact with the receiving member;
repeating the heat transfer step until the blade reaches a melting temperature of the packaging material when the packaging device is initialized;
Control method for packaging equipment. A control method for a packaging device in which an object to be packaged is wrapped with two packaging materials by pressing two packaging materials sandwiching an object between them against a receiving member with a heated blade to weld and cut the packaging material. hand,
heating the blade;
a heat transfer step of moving a heat transfer member multiple times between a heat absorption position in contact with the blade and a heat transfer position away from the blade and in thermal contact with the receiving member;
repeating the heat transfer step until the blade reaches a melting temperature of the packaging material when the packaging device is initialized;
Control method for packaging equipment.

Images