JP4717521B2 - Packaging equipment - Google Patents

Description

  The present invention prevents the molten packaging bag material from adhering when the opening of the packaging bag material made of synthetic resin is closed by thermocompression with a heating member heated by a heating element such as a heater wire. The present invention relates to a packaging device provided with an adhesion preventing material on the surface of a heating member.

  Conventionally, a synthetic resin belt-like connecting bag (packaging bag material) that is perforated so as to be separated into each bag is opened, and articles such as medicines (tablets) and electronic parts are placed in the belt-like connecting bag by an article supply device. , And the opening is closed by thermocompression bonding, after which the perforated perforations are separated and separated into respective bags (for example, see Patent Document 1).

  FIG. 7 is a view showing a heating member to which an adhesion preventing material is fixed in a conventional packaging device, (a) is an enlarged perspective view of a main part showing a normal state, and (b) is a wrinkle on the adhesion preventing material. The principal part expansion perspective view which shows the state at the time of contact, (c) is a principal part expansion perspective view which shows a state when an adhesion prevention material peels.

In the packaging device, when the opening of the synthetic resin belt-like connecting bag is closed, the opening is heated by the heater wire 100 as shown in FIG. Yes. In order to prevent a bag melted by heat from adhering to the heating member 200 when the opening of the bag is thermocompression bonded to the surface of the heating member 200 formed in the adhesive tape shape, Teflon (registered trademark) is used. ) An adhesion preventing material 300 that is a coating is affixed.
JP-A-10-194212 (paragraphs 0020-0023, FIG. 7)

  However, the heating member 200 of the packaging device as shown in FIG. 7A is expanded and contracted by the heat of the heater wire 100 when used, and the tape surface as shown in FIG. 7B. Concavities and convexities occur on the flat surface at. Along with this, the adhesion preventing material 300 attached to the heating member 200 expands and contracts together with the heating member 200 and wrinkles 301 are generated. When the opening portion of the bag is thermocompression bonded with the wrinkle 301 on the adhesion preventing material 300, the seal surface of the thermocompressed bag is pressed by the wrinkle 301 to become uneven, and a poorly welded portion is generated. There was a fear.

  Further, when the adhesion preventing material 300 is used in the state where the wrinkle 301 is present, a part of the wrinkle 301 is peeled off and dropped as shown in FIG. Is exposed. When the melted bag comes into contact with the exposed heating member 200, the bag adheres to the heating member 200 and does not fall.

  If it does so, the operation | work of the packaging process which obstruct | occludes the opening part of the strip | belt-shaped connection bag which packed the part will be stopped, and the stop of a manufacturing line will be forced. For this reason, the anti-adhesion material 300 and the heating member 200 need to be frequently inspected for deformation, wrinkles 301 and peeling, and must be replaced with new ones every few days. There was a problem that it took time, labor and cost for inspection and replacement.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a packaging device provided with a durable anti-adhesive material that is not deformed by repeated expansion and contraction due to heat and does not generate wrinkles.

In order to solve the above-mentioned problem, the packaging device according to claim 1 is provided for a packaging bag material made of synthetic resin, a heating element provided across the width direction, and facing the heating element, A belt-shaped heating member that is heated by a heating element; and an adhesion preventing material that is fixed to one side of the heating member and prevents the packaging bag material that is melted from adhering. In the packaging device in which the opening of the bag material is welded and closed by pressurizing the surface of the adhesion preventing material, the heating member is attached to at least one of both ends supported in the longitudinal direction. is installed a spring member that pulls in the longitudinal direction, the spring member, the proximal end portion of the spring member, and a fixing unit for fixing the holding plate for holding the spring member, the distal end of the spring member, the And a support member that engages with one of the engaging portions formed at both ends in the longitudinal direction of the heat member, respectively. And a bracket for fixing the base plate to the holding plate at the base end, and the spring member and the bracket at least each of the fixing portions to the holding plate. And are fixed to the holding plate by the same fastening member .

  According to the first aspect of the present invention, the adhesion preventing material provided on the heating member is always in the longitudinal direction as at least one of both end portions of the heating member is pulled in the longitudinal direction by the spring member. It will be pulled. For this reason, even if the heating member repeatedly expands and contracts due to heating of the heating element, the heating member is deformed into a distorted state due to the compressive stress at the time of thermal expansion because the spring force is always pulled in the longitudinal direction. Is eliminated and kept flat. As a result, when the bag is closed and separated by sandwiching the opening of the bag with the anti-adhesive material heated by the heating element through the heating member, the bag is always separated from the anti-adhesive material smoothly and falls. In addition, the surface of the adhesion preventing material is maintained on a flat surface without wrinkles. For this reason, the sealing surface of the finished bag is always clean because no irregularities are formed by wrinkles.

Furthermore, according to the first aspect of the present invention, the heating member can be easily attached by engaging the engaging portions at both ends with the supporting portions at the tip of the spring member. . Since both sides of the heating member attached to the spring member are pulled in the longitudinal direction of the heating member by the spring member, the heating member is attached without being loosened or rattling.

Further, according to the present invention described in claim 1, both end portions of the heating element is fixed to the holding plate via a bracket. The spring member and the bracket are each fixed to the holding plate at the same time by the same fastening member. As a result, the number of parts of the fastening member and the fastening work time are reduced.

  According to the packaging device of the first aspect of the present invention, the adhesion preventing material provided on the heating member is always pulled in the longitudinal direction by the spring members at both ends of the heating member. Thus, generation of wrinkles and peeling from the wrinkled portions are eliminated, and durability is improved. Thus, after the opening of the bag is closed with the adhesion preventing material on one side of the heating member heated by the heating element, the bag can always be separated from the adhesion preventing material and dropped.

Furthermore, according to the packaging device of claim 1 of the present invention, the heating member can be easily attached by engaging the engaging portions at both ends with the support portions of the spring member, so that no fastening member is required. Therefore, the number of parts and the number of assembling steps can be reduced to simplify the installation work.

Moreover, according to the packaging apparatus of Claim 1 of this invention, a spring member and a bracket fix each fixing | fixed part to a holding | maintenance plate with the same fastening member, The number of parts of a fastening member and fastening work time are obtained. This can reduce the cost.

Next, the best mode for carrying out the invention (hereinafter referred to as “embodiment”) will be described with reference to FIGS. In the present invention, the direction of the packaging device changes depending on the orientation when it is arranged, but the left side shown in FIGS. 1 to 5 will be described as “front” and the right side as “rear”.
FIG. 1 is a schematic view showing the overall structure of the packaging device, (a) is an operation explanatory view showing a state when the opening of the packaging bag material is opened, and (b) is inside the packaging bag material. Explanatory drawing which shows the state when supplying the goods to (b), (c) is the operational explanatory drawing which shows the state when closing the opening part of the packaging bag raw material.

≪Packaging equipment≫
Hereinafter, as an example of an embodiment of the present invention, a packaging device 1 shown in FIGS. 1A to 1C will be described. In the packaging device 1, as shown in FIG. 1A, a seal portion 2f that forms the bottom of each bag 2a, a perforation 2c that is formed directly under the seal portion 2f, and one side of the perforation 2c A packaging bag material 2 made of a synthetic resin belt-like connecting bag having an opening 2b formed by cutting is pulled out from the hub 3. Next, as shown in FIG. 1 (b), an article P such as an electronic component is put into the bag 2a by the article supply device F, and the opening 2b is thermocompression bonded as shown in FIG. 1 (c). At the same time as the closing, a perforation 2d for opening when the user opens is formed directly below the opening 2b, and then the perforation 2c immediately above the closed by thermocompression bonding is separated and separated into each bag 2a. ing.

FIG. 2 is an enlarged exploded perspective view of a main part showing an installation state of the heater wire, the heating member, and the adhesion preventing material.
The packaging device 1 heats at least the thermocompression bonding part 2e (see FIG. 1 (c)) immediately below the opening 2b of the packaging bag material 2 made of synthetic resin with the heater wire H as shown in FIG. Any member may be used as long as it has a function of thermocompression-bonding and closing on the surface of the adhesion preventing material T fixed to the heating member 65 and includes a spring member SP that pulls the heating member 65 in the longitudinal direction. That is, the packaging device 1 is fixed to one side surface (front side surface) of the heater wire H, the heating member 65, and the heating member 65, which will be described later, and the thermocompression bonding portion 2e (FIG. c) (see)) at least the adhesion preventing material T and the spring member SP.

FIG. 3 is a perspective view of the packaging device with the front frame removed.
As shown in FIG. 3, the packaging device 1 is provided with a body frame 11 provided with an operation panel 12 on the side, a blower 5 on the left inner wall, and an article supply device F and a thermocompression cutting device on the front side. 6 are installed. The blower 5 is air-flowed from the blowing box 52 through the duct 51 fixed to the inner wall of the main body frame 11 toward the opening 2b (see FIG. 1 (b)) of the packaging bag material 2 in the thermocompression cutting apparatus 6. It is installed to blow out.

FIG. 4 is a perspective view showing a drive transmission mechanism provided in the packaging device.
As shown in FIG. 4, the packaging device 1 includes a hub 3, a transport device 4, a perforation position detection sensor S <b> 1, a blower 5, an article supply device F, a thermocompression cutting device 6, and an advance / retreat drive device 9. In addition, a control device (not shown) provided in the operation panel 12 (see FIG. 3) (not shown) is also provided.

≪Packing bag material≫
The packaging bag material 2 is composed of a belt-like connecting bag in which a bag 2a (see FIGS. 1A to 1B) for finally storing an article P (see FIG. 1B) is continuously formed, as will be described later. In addition, a broken line perforation 2c, an opening 2b formed by cutting one side of the perforation 2c and opened by blowing air with a blower 5, and a thermocompression-bonded seal 2f are the length of the bag 2a. It is formed with the synthetic resin with the thermocompression bonding provided in this space | interval. The packaging bag material 2 is made of, for example, an acrylic resin such as polycarbonate, polyolefin, polyester, or polyacrylate, polyvinyl chloride, or polyvinylidene chloride.

  As shown in FIG. 4, the conveying device 4 unwinds the packaging bag material 2 wound around the shaft-shaped hub 3 and heats it via an arc discharge type perforation position detection sensor S1 disposed in the middle. It is a device that conveys to the pressure cutting device 6. The conveyance device 4 includes a bar 41 for guiding the packaging bag material 2 fed from the hub 3 so as to be conveyed toward the perforation position detection sensor S1, a conveyance roller 42 for driving, and a packaging bag. An auxiliary conveyance guide roller 43 for guiding the material 2 and a guide 47 for guiding the conveyed packaging bag material 2 between the front seal portion 61 and the rear seal portion 62 of the thermocompression cutting apparatus 6 are mainly used. It is configured to prepare for.

A gear 46 is provided at one end of the shaft of the conveying roller 42 via an electromagnetic clutch 45. The electromagnetic clutch 45 is turned on and off by a signal from a control device (not shown) based on the position signal of the perforation 2c detected by the perforation position detection sensor S1, and the conveying roller 42 and the gear 46 are coupled by magnetic force. For this purpose, the conveying device 4 is intermittently operated in accordance with the position of the perforation 2c. When the electromagnetic clutch 45 is ON, the conveying roller 42 and the gear 46 are connected to rotate integrally, and the rotation of the motor M is transmitted to the conveying roller 42 via the toothed belt 44, the gear 46 and the electromagnetic clutch 45. Then, the packaging bag material 2 is conveyed. When the electromagnetic clutch 45 is OFF, the gear 46 is disconnected from the shaft of the transport roller 42, the rotation of the gear 46 is not transmitted to the transport roller 42, and the transport device 4 and the packaging bag material 2 are stationary. become.
Note that a toothed belt 44 wound around a drive gear Ma provided on a drive shaft of the motor M is wound around the gear 46.

<Opening opening>
As shown in FIG. 1 (a), when the opening 2b of the packaging bag material 2 is conveyed between the front seal part 61 and the rear seal part 62 of the thermocompression cutting apparatus 6, the blower 5 It is a device that facilitates the packing of articles P by sending air into the bag 2a from the opening 2b and opening it wide.
The opening 2b is detected by the opening detection sensor S2 provided on the supply port side of the chute of the article supply device F disposed above between the front seal portion 61 and the rear seal portion 62. Is done.
As shown in FIG. 5, the opening detection sensor S <b> 2 is made of a substantially hinge-shaped conductive metal, and includes, for example, an attachment portion S <b> 2 b fixed to the front lower end portion of the chute of the article supply device F, the article P, and the blowing box 52. The movable contact portion S2a is disposed so as to be pressed by the air from the shaft and rotate downward about the axis to contact the fixed contact portion 72a at the tip of the shaft 72, and the movable contact portion S2a is connected to the article supply device F. And a spring S2c for automatically returning to the side. The opening detection sensor S2 closes the opening 2b when the movable contact portion S2a comes into contact with the fixed contact portion 72a and becomes conductive (ON state) when the article P is supplied from the article supply device F. The rotated movable contact portion S2a presses the inner wall of the opening 2b, and the packaging bag material 2 made of an insulator is interposed between the movable contact portion S2a and the fixed contact portion 72a for insulation. When it is in the state (OFF state), it is determined that the opening 2b is opened.
The article supply apparatus F is an apparatus that automatically supplies the article P into the packaging bag material 2 in accordance with the opening 2b formed in the packaging bag material 2 that is intermittently conveyed. It consists of a feeder. The supply port of the article supply device F is disposed above the thermocompression-bonding cutting device 6, and the article P is put into the bag 2a opened from the supply port.

≪Thermo-compression cutting equipment≫
FIG. 5 is an enlarged cross-sectional view of a main part showing a thermocompression cutting device provided in the packaging device.
As shown in FIG. 5, the thermocompression-cutting device 6 includes a closing process for closing the opening 2b by thermocompression bonding of the thermocompression bonding part 2e of the packaging bag material 2, and a perforation 2d for newly opening the bag 2a. This is a device that performs perforation forming processing for forming (see FIG. 1 (c)) and cutting processing for cutting the perforation 2c of each packaging bag material 2 and separating it into each bag 2a. The thermocompression cutting device 6 includes a front seal portion 61 and a rear seal portion 62 that are disposed opposite to each other and sandwich the packaging bag material 2, and an advance / retreat drive device 9 that moves the front seal portion 61 back and forth to the thermocompression bonding position (see FIG. 4). ), A shaft 72 for guiding the moving direction of the front seal portion 61, a cutting plate 64 and a cutting plate pushing means 8 for performing the cutting process, a heating member 65 (see FIG. 6) for performing the closing process, and a heater A line H and a pressing member 66, a perforation cutter 68 and a receiving base 63 for performing the perforation forming process, and a coil spring 69 for urging the seal plate 61a with respect to the pressing member 66 and the perforation cutter 68 so as to advance and retreat. The support member 7 that fixes the front end portion of the shaft 72 provided on the front seal portion 61 to the front frame 13 is mainly provided.

<Front seal part>
The front seal portion 61 is a member that linearly reciprocates in the front-rear direction toward the thermocompression bonding position by the advance / retreat drive device 9 (see FIG. 4). The front seal portion 61 includes three seal plates 61a arranged in parallel horizontally with an interval in the vertical direction, intermediate members 61b and 61c for integrally fixing the front end portions of the seal plates 61a, and advancing and retreating. A connecting member 61f connected to an advance / retreat bar 93 (see FIG. 4) of the driving device 9, a shaft 72 that supports the front seal portion 61 by loosely inserting the lower intermediate member 61c, the connecting member 61f, and the pressing member 66; The pressing member 66 that presses the lower vicinity of the perforation 2c (see FIG. 1B) of the packaging bag material 2 and presses it against the heating member 65, and the pressing member 66 and the heating member 65 form the opening 2b. A perforation cutter 68 for newly forming a perforation 2d (see FIG. 1C) in the vicinity of the lower side of the thermocompression bonding portion 2e of the closed packaging bag material 2, a suspending member 71 and an intermediate member 61c Between A coil spring 69 which Zaisa is urging the intermediate member 61c to the rear seal section 62 side, a is configured mainly with.

In the front seal portion 61, the perforation cutter 68, the pressing member 66, and the connecting member 61f are moved together in the front-rear direction by the advance / retreat drive device 9 connected to the connecting member 61f while being guided by the shaft 72 and the seal plate 61a. It is configured.
In the front seal portion 61, the seal plate 61a and the intermediate members 61b and 61c are urged by the coil spring 69 following the connecting member 61f when the connecting member 61f is moved rearward by the advance / retreat driving device 9. As a result, the movement is stopped as a result of moving integrally with the rear side and coming into contact with the seal plate 62a of the rear seal portion 62. The seal plate 61a and the intermediate members 61b and 61c are pressed against the connecting member 61f against the spring force of the coil spring 69 when the connecting member 61f is moved forward by the advance / retreat driving device 9. Is configured to return to the original position.
The connecting member 61f is a member for moving the perforation cutter 68 and the pressing member 66 to move forward and backward by the advance / retreat driving device 9, and is fixed to the front surface side of the pressing member 66 and has seal plates 61a, 61a, It is interposed between 61a.
The coil spring 69 is loosely fitted to the shaft 72 and is interposed between the suspending member 71 and the intermediate member 61c, so that the connecting member 61f, the pressing member 66, and the perforated cutter 68 are moved rearward by the advance / retreat driving device 9. When it moves, it has a spring force that follows this and moves the intermediate member 61 c and the seal plate 61 a in the direction of the rear seal portion 62.

As shown in FIG. 5, the support member 7 has a shaft 72 that serves as a support shaft that supports the front seal portion 61 and a fixed contact portion 72 a of the opening detection sensor S <b> 2, and the shaft 72 is fixed to the front frame 13. A suspension member 71. The support member 7 is formed of a conductive metal member in order to flow the current flowing through the fixed contact portion 72a to the front frame 13 side.
The shaft 72 is inserted through the coil spring 69, the intermediate member 61 c, the connecting member 61 f, and the pressing member 66 to guide the pressing member 66 so as to advance and retreat toward the heating member 65. Further, the shaft 72 receives the perforated cutter 68. Opening detection sensor that functions as a guide member that guides it to advance and retreat toward 63, and detects the opening state of the opening 2b when the movable contact S2a is in contact / non-contact with the fixed contact 72a at the tip S2 also functions (see FIGS. 1B and 1C). The shaft 72 is horizontally disposed with the front end fixed to the suspension member 71, and the rear end extends below the supply port of the article supply device F, and is fixed when the movable contact portion S2a rotates. The contact portion 72a is provided so as to be in contact with the contact portion 72a.

<Rear seal part>
When the front seal portion 61 is moved to the rear position by the advancing / retreating drive device 9, the rear seal portion 62 contacts and presses against the perforation of the packaging bag material 2 when the seal plate 62 a and the seal plate 61 a are pressed against each other. This is a member that temporarily holds the vicinity of 2c. The rear seal portion 62 includes three seal plates 62a that are fixed to the front side of the body frame 11, face the three seal plates 61a, and are arranged in parallel in the vertical direction at the same interval. The rear end portions of the plate 62a are integrally fixed by intermediate members 62b and 62c, respectively.
A cutting plate 64 used for cutting the perforation 2c and cutting the bag 2a is interposed between the upper seal plate 62a and the intermediate seal plate 62a so as to advance and retract by a solenoid 81.
Between the lower side and the intermediate seal plate 62a, a heater wire H described later, a heating member 65 to which an adhesion preventing material T is fixed, a spring member SP, a cradle 63 for a perforation cutter 68, Is installed.

<Plate extrusion means for cutting>
As shown in FIG. 5, the cutting plate push-out means 8 has a perforation 2c of the packaging bag material 2 sandwiched between the seal plate 61a and the seal plate 62a when the seal plate 61a is moved to the rear position. The cutting plate 64 is moved by the solenoid 81 to be hit and cut. The cutting plate pushing means 8 cuts the perforation 2c with the cutting plate 64 by sucking and repelling the plunger 82, the bar-like plunger 82 fixed to the cutting plate 64, and the plunger 82. And a solenoid 81 for moving it to the position and returning it to the original position.

The cutting plate 64 is made of an L-shaped member as viewed from the side and arranged in parallel with a predetermined interval between the upper side and the intermediate seal plate 62a, and between the upper side and the intermediate seal plate 62a. It is installed in the fixed intermediate member 62b so as to freely advance and retract. The intermediate member 62b is fixed to the main body frame 11.
The plunger 82 is made of an iron core having a cutting plate 64 bolted to one end.

<Heater wire>
FIG. 6 is an enlarged plan view of a main part showing an installation state of the heater wire, the heating member, and the adhesion preventing material.
As shown in FIGS. 2 and 6, the heater wire H corresponding to the heating element of the present invention is a heat source for melting the packaging bag material 2 (see FIG. 1 (c)). It consists of a nichrome wire etc., and is provided over the width direction (arrow X direction) with respect to the packaging bag material 2. At both ends in the longitudinal direction of the heater wire H, a screw for installing the heater wire H on the bracket B or a washer-like fastening portion Ha having a hole through which a bolt is inserted is formed. Each fastening portion Ha is provided with a bracket B in which the base end portion (fixed portion Bb) is fixed to the holding plate 67. On the back surface (rear surface) of the heater wire H, a flat plate member 67b having an insulating heat insulating material 67a fixed to the front surface is installed with a slight gap. On the front side of the heater wire H, a heating member 65 heated by the heater wire H is disposed to face the heater wire H. Note that both ends of the heater wire H are electrically connected to the operation panel 12.

<Heating member>
The heating member 65 is provided so as to face the heater wire H, and melts the packaging bag material 2 (see FIG. 1C) through the adhesion preventing material T by the heat heated by the heater wire H. The belt-shaped member is pressed and thermocompression bonded so as to sandwich the lower portion of the opening 2b (see FIG. 1B) of the packaging bag material 2 with the pressing member 66. The heating member 65 is made of, for example, a tape material such as a glass cloth tape made of glass fiber, and is disposed at a position facing the pressing member 66. The heating member 65 is made of, for example, an adhesive tape in which an adhesion preventing material T such as Teflon (registered trademark) is fixed to the entire front surface (one side surface), and an adhesive surface 65b is provided on the entire back surface on the rear side. . Both end portions in the longitudinal direction of the heating member 65 are bent so as to be folded back into a substantially cylindrical shape with the adhesive surface 65b inside so that they can be fitted and supported by the support portion SPa of the spring member SP. An engaging portion 65a is formed by adhering 65b to the opposing adhesive surface 65b. The heating member 65 is always assembled by the spring member SP so as not to be deformed into a curved or uneven surface when it is pulled in the longitudinal direction (horizontal direction) and expanded and contracted by the heat of the heater wire H. When the engaging portion 65a is engaged with the support portion SPa, the adhesive surface 65b disposed on the inner surface adheres to the support portion SPa and is firmly fixed. The adhesive surface 65 b is adhered to the heater wire H when the packaging device 1 is operated, and the heat of the heater wire H is easily conducted to the heating member 65.

<Adhesion prevention material>
As for the adhesion preventing material T, the thermocompression bonding portion 2e (see FIG. 1C) of the packaging bag material 2 is terminated with the adhesion preventing material T on one side surface (front surface) of the heating member 65 and the pressing member 66. Thereafter, when the pressing member 66 automatically returns to the original position, the thermocompression bonding part 2e is immediately separated and the bag 2a packed with the article P is dropped. The adhesion preventing material T is a member that is fixed to one side surface (front surface) of the heating member 65 by coating or the like and prevents the thermocompression bonding portion 2e of the molten packaging bag material 2 from adhering. It consists of Teflon (registered trademark) and the like excellent in non-stickiness and heat resistance.

<Spring member>
Each of the spring members SP is formed in a symmetrical shape, and is used for pulling the heating member 65 in the longitudinal direction (arrow X direction) by a spring force, and is made of, for example, a plate-like metal member. The spring member SP has a fixing portion SPb for fixing to the holding plate 67 at a base end portion (an end portion on the holding plate 67 side) that is bent at an acute angle exceeding a right angle from the center portion, and a distal end portion ( Engagement formed at both ends in the longitudinal direction (arrow X direction) of the heating member 65 at the end of the heating member 65) in the same direction as the base end from the center and bent at right angles to the hook shape When engaged with the portion 65a, it has a support portion SPa that applies a spring force to pull the heating member 65 in the longitudinal direction. The support part SPa is made of a rod-like member formed by forming a notch groove in the vertical direction at the tip of the spring member SP.

<Bracket>
The bracket B is a member for fixing both end portions of the heater wire H to the holding plate 67, and is made of a substantially U-shaped metal plate member. Each of the brackets B is formed in a symmetrical shape, and is disposed so as to overlap the inner side (the flat plate member 67b side) of the left and right spring members SP. The bracket B is provided so that the center portion faces the side surface of the flat plate member 67b, and the connecting portion Ba, which is formed by bending the tip portion at a right angle, is connected to the fastening portion Ha at the end portion of the heater wire H and held. A fixing portion Bb formed by bending the base end portion on the plate 67 side at a right angle is fixed to the holding plate 67 by a fastening member N. Note that the spring member SP and the bracket B are arranged such that at least the fixing portion SPb is placed on the fixing portion Bb so as to overlap the holding plate 67 and fixed to the holding plate 67 by the same fastening member N.

<Holding plate>
As shown in FIG. 2, the holding plate 67 is a member that fixes the spring member SP and the bracket B and supports the back surface (rear surface) of the heater wire H with a flat plate member 67 b provided integrally. On the rear side of the holding plate 67, a base end portion of a bolt loosely inserted into a cylindrical member and screwed with a nut is fixed, and is installed on the main body frame 11 so that the position can be adjusted in the front-rear direction. The flat plate member 67b is a member that is arranged on the back side (rear side) of the heater wire H and prevents the heater wire H from being bent when the opening 2b of the packaging bag material 2 is thermocompression bonded. is there. An insulating heat insulating material 67a is fixed to the front surface of the heater wire H of the flat plate member 67b.

  As shown in FIG. 4, the advancing / retreating drive device 9 is a device that advances and retracts the entire front seal portion 61 in the front-rear direction. For example, the motor M, the toothed belt 44 wound around the drive gear Ma, A pulley 91 wound around the belt 44 and a link mechanism 92 that connects one end to the connecting member 61f and advances and retracts the connecting member 61f by the pulley 91 are configured.

≪Action≫
Next, the operation of the packaging device according to the embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1A, first, the packaging bag material 2 wound around the hub 3 in a roll shape is unwound from the hub 3, and the bar 41, the perforation position detection sensor S1, the transport plate (not shown). First, the front end is set on the rear seal portion 62 through the conveyance guide roller 43 and the conveyance roller 42. When the start switch (not shown) is turned on in this state, the motor M and the electromagnetic clutch 45 shown in FIG. 4 are driven, and the conveying roller 42 and the front seal portion 61 are operated via the toothed belt 44 to convey the sheet. The device 4 and the advance / retreat drive device 9 move. Further, when the start switch is turned on, a current flows through the blower 5 and the heater wire H (see FIG. 2) to operate.

As shown in FIG. 1 (a), the packaging bag material 2 is used for packaging when the conveying device 4 is operated by a signal from the control device based on the position signal of the perforation 2c detected by the perforation position detection sensor S1. The perforation 2c at the tip of the bag material 2 is intermittently conveyed so as to temporarily stop at a position between the upper side and the intermediate seal plates 61a and 62a.
When the perforation 2c and the opening 2b are sent between the upper and intermediate seal plates 61a and 62a, the electromagnetic clutch 45 (see FIG. 4) is controlled by the control device (see FIG. 4) based on the perforation position detection sensor S1. OFF by a signal from (not shown). If it does so, the conveying apparatus 4 will stop temporarily. And in this state, as shown in FIG.1 (b), the air discharged from the blowing box 52 is poured in into the opening part 2b, and the opening part 2b is opened largely.

  Next, the article supply device F is actuated by a signal from a control device (not shown) to supply a predetermined amount of the article P into the bag 2a opened from the supply shooter. The opening state of the opening 2b at this time is determined by the shaft 72 when the movable contact portion S2a of the opening detection sensor S2 presses the inner wall of the opening 2b by the load of the article P sent from the article supply device F. It is detected that the opening 2b is opened when the packaging bag material 2 is interposed between the fixed contact portion 72a and the movable contact portion S2a at the tip of the wrapping bag so as to be insulated. In addition, when the movable contact portion S2a rotates around the axis, when the movable contact portion S2a does not contact the opening 2b of the packaging bag material 2, the movable contact portion S2a comes into contact with the fixed contact portion 72a and is turned on. Thus, it is detected that the opening 2b is not open. At this time, the packaging device 1 is temporarily stopped by the control device.

When the opening 2b is normally opened, the advancing / retreating drive device 9 moves the front seal portion 61 connected by the link mechanism 92 and the connecting member 61f to the rear side, so that FIG. As shown, the front sealing part 61 and the rear sealing part 62 sandwich the packaging bag material 2. At this time, the seal plate 61a of the front seal portion 61 and the intermediate members 61b and 61c are stopped together when the seal plate 61a contacts the seal plate 61a of the rear seal portion 62.
The advancing / retracting drive device 9 further moves the perforated cutter 68 and the pressing member 66 to the rear side by moving the connecting member 61f to the rear side. Then, the perforation cutter 68 strikes the packaging bag material 2 to newly form a perforation 2d for opening (see FIG. 1C). At the same time, the pressing member 66 presses the packaging bag material 2 against the adhesion preventing material T on the front surface of the heating member 65 heated by the heater wire H, and thermocompresses the thermocompression bonding part 2e to open the opening. 2b is closed (see FIG. 1B).
Further, in this state, the solenoid 81 is excited by a signal from the control device to advance and retract the plunger 82 and the cutting plate 64, and the perforation 2c of the packaging bag material 2 by the tip of the cutting plate 64 (FIG. 1 ( c) is hit and cut.

Next, when the front seal portion 61 is moved forward by the advance / retreat drive device 9 (see FIG. 4) by driving the motor M, the bag 2a sandwiched between the front seal portion 61 and the rear seal portion 62 is packaged. It is separated from the bag material 2 and dropped, guided by the guide plate 14 and stored in the storage box (see FIG. 1C). When the front seal portion 61 is separated from the rear seal portion 62, as shown in FIG. 2, the front surface of the heating member 65 is provided with an adhesion preventing material T. It smoothly separates from the adhesion preventing material T and falls without adhering to 2a.
Then, the control device operates the electromagnetic clutch 45 shown in FIG. 4 to rotate the transport roller 42 of the transport device 4 so that the packaging bag material 2 is transported intermittently again at the position of the perforation 2c. Then, the opening 2b is sequentially opened, the article P is supplied from the article supply device F, the opening 2b is closed, the perforation 2d is formed, the bag 2a is divided, and the storage in the storage box is repeated. It is.

  The heating member 65 shown in FIG. 6 is repeatedly heated and cooled as the heater wire H is turned on and off, and is expanded and contracted to expand and contract. However, the heating member 65 is always pulled in the longitudinal direction of the arrow X by the spring force of the spring member SP, so that when it expands and extends, the heating member 65 is bent or deformed into an uneven shape. This prevents the front surface from being kept flat.

  For this reason, since the adhesion preventing material T provided on the front surface of the heating member 65 is always flat due to the flat front surface of the heating member 65, wrinkles are formed. In addition, the peeling and dropping off of the portion where the wrinkles are formed are eliminated. Therefore, the adhesion preventing material T has improved durability, can extend the part replacement period, and can reduce the cost of part replacement.

  Since the bag 2a (see FIG. 1 (c)) pressed by the adhesion preventing material T and the opening 2b is closed is thermocompression-bonded so as to be imprinted on the front surface of the adhesion preventing material T, The thermocompression bonding part is always finished on a flat and clean surface.

≪Modification≫
The present invention is not limited to the above-described embodiment, and various modifications and changes can be made within the scope of the technical idea. The present invention extends to these modifications and changes. Of course.

  As the packaging apparatus according to the embodiment of the present invention, as illustrated in FIGS. 1A to 1B, the packaging apparatus 1 that automatically closes the opening 2b of the packaging bag material 2 has been described as an example. The present invention is not limited to this, and the pressing member 66 may be manually pressed against the adhesion preventing material T of the heating member 65 and thermocompression bonded (see FIG. 2).

  Further, the heater wire H is not limited to the shape as shown in FIG. 2, and the shape is not particularly limited as long as it is a heating element capable of heating the heating member 65. For example, the heater wire H may be in the shape of a coil or may be integral with the heating member 65.

  The heating member 65 is not limited to a tape material, and may be, for example, a metal plate material such as a strip-shaped aluminum alloy having good heat conduction. The heating member 65 is provided with a spring member SP that pulls the heating member 65 in the longitudinal direction at at least one of both end portions (engagement portions 65a) supported in the longitudinal direction (arrow X direction). Good.

  The adhesion preventing material T may be any material that prevents the thermocompression bonding part 2e of the packaging bag material 2 melted by the heat from the heater wire H from adhering, and Teflon (registered trademark) is used as the heating member 65. It is not limited to the thing fixed to. For example, the adhesion preventing material T may be a film-like material in which a fluororesin such as Teflon (registered trademark) is directly baked on the front surface of the heating member 65. The adhesion preventing material T may be a so-called clear coat glass fixed to the heating member 65 with an adhesive.

  It should be noted that the spring member SP is not only a member called a leaf spring, but also a plate-like member generally not called a leaf spring, and when the fixing portion SPb is fixed, the heating member 65 What is necessary is just to have a spring force in the longitudinal direction (arrow X direction). The spring member SP may be a member that has no spring force at all and is urged in the longitudinal direction (arrow X direction) of the heating member 65 by a compression coil spring or the like.

It is the schematic which shows the whole structure of a packaging apparatus, (a) is operation | movement explanatory drawing which shows the state when opening the opening part of the packaging bag raw material, (b) supplies the goods in the packaging bag raw material Operation explanatory drawing which shows the state at the time of carrying out, (c) is an operation explanatory drawing which shows a state when the opening part of the packaging bag raw material is obstruct | occluded. It is a principal part expansion disassembled perspective view which shows the installation state of a heater wire, a heating member, and an adhesion prevention material. It is a perspective view of the packaging apparatus of the state which removed the front frame. It is a perspective view which shows the drive transmission mechanism provided in the packaging apparatus. It is a principal part expanded sectional view which shows the thermocompression-bonding cutting apparatus provided in the packaging apparatus. It is a principal part enlarged plan view which shows the installation state of a heater wire, a heating member, and an adhesion prevention material. It is a figure which shows the heating member which adhered the adhesion prevention material in the conventional packaging apparatus, (a) is a principal part expansion perspective view which shows the state at the time of normal, (b) is a state when a wrinkle was made in the adhesion prevention material The principal part expansion perspective view which shows this, (c) is a principal part expansion perspective view which shows a state when an adhesion prevention material peels.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Packaging apparatus 2 Packaging bag raw material 2b Opening part 65 Heating member 65a Engagement part 67 Holding plate B Bracket Bb, SPb Fixing part H Heater wire (heating element)
N fastening member SP spring member SPa support part T adhesion preventing material

Claims (1)

A heating element provided over the width direction of the packaging bag material made of synthetic resin, a belt-shaped heating member provided facing the heating element and heated by the heating element, and one side surface of the heating member An adhesion preventing material for preventing adhesion of the packaging bag material to be adhered and melted, and pressurizing the opening of the packaging bag material on the surface of the adhesion preventing material In a packaging device that welds and closes,
The heating member is provided with a spring member that pulls the heating member in the longitudinal direction on at least one of both ends supported in the longitudinal direction ,
The spring member is fixed to a holding plate that holds the spring member at a base end portion of the spring member;
It comprises a plate-like member having, at the tip of the spring member, a support portion that engages with one of the engagement portions formed at both ends in the longitudinal direction of the heating member,
At both ends in the longitudinal direction of the heating element, a bracket is provided for applying a force to pull the heating element in the longitudinal direction at the distal end, and fixing the holding plate to the holding plate at the proximal end,
The packaging device, wherein the spring member and the bracket are arranged such that at least the respective fixing portions are arranged so as to overlap the holding plate, and are fixed to the holding plate by the same fastening member .

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