JP5392503B2 - Film packaging equipment - Google Patents

Description

  The present invention relates to a film packaging apparatus in which a packaging film is wound around a packaged product containing contents in a container and the film is welded by heat.

  Traditionally, fresh foods such as fruits, vegetables and fish, or foods stored in containers such as side dishes, rice balls, and lunch boxes are wrapped with a packaging film such as stretch film and the bottom is adhered. I am trying to sell it at.

  When adhering such a packaging film, self-adhesive vinyl chloride films and the like can be adhered by overlapping each other. However, since a polyolefin film or the like does not have self-adhesiveness, it cannot be bonded only by being superposed.

  For this reason, conventionally, a film wrapping apparatus has been developed that can adhere to each other even when a packaged product is wrapped using not only a self-adhesive film but also a film that does not have self-adhesiveness. Yes.

  Here, patent document 1 is referred about the conventional stretch film packaging apparatus. The film wrapping apparatus described in this document is provided with a roll-shaped strip film on a base, pulls out the strip-shaped film, cuts it with a cutter equipped with a heater, and wraps the packaged product with the cut film. The bottom portion is welded by the heat of the heater.

  By the way, in said film packaging apparatus, the heater stand provided in front of the cutter is provided with heater holding cases on the left and right, and each heater holding case has a configuration in which the upper part of the heater protrudes into a plurality of uneven shapes. . With such a configuration, the bottom surface of the packaged product wrapped with the film can be thermally welded partially and intensively, and an efficient bonding operation can be performed in a short time.

  Further, in the above film packaging apparatus, the rear end of the heater holding case is provided with a shaft so that the pressing operation can be performed and returned by a spring. Further, a limit switch for starting each heater by the pressing operation of the heater holding case is provided. Provided, and the temperature rise of each heater is stopped after a predetermined time.

Utility Model Registration No. 2561597

By the way, in the structure of said patent document 1, since it is set as the structure which protruded above the heater in the several uneven | corrugated shape, the water | moisture content, oil content, contents, etc. which were spilled from the to-be packaged product wrapped with the packaging film of a heater It becomes easy to collect in the concave portion, and the concave portion of the heater is difficult to clean and tends to be unsanitary. Furthermore, water that has accumulated in the recess of the heater has a garbage heat, such as oil or contents, to become an obstacle when controlling the heater thermal efficiency, to increase the generation of CO _2, wasted power consumption There were inconveniences such as

  Furthermore, in the structure of the above-mentioned Patent Document 1, since each heater is controlled by time, heat accumulates in the heater, the heater holding case, etc. over time, and it becomes easy to overheat. There was a problem that the power of the machine fell and hindered smooth packaging work.

The present invention has been made in view of the above circumstances, and has a structure in which dust such as moisture, oil, or contents does not accumulate on the upper surface of the heater that thermally welds the bottom surface of the packaging film that wraps the packaged product. An object of the present invention is to provide a film packaging apparatus that can be used in a sanitary manner, reduce the generation of CO ₂ and consume power by efficiently controlling the temperature of a heater, and perform a smooth packaging operation. And

  Furthermore, the present invention requires the situation in recent sales stores, that is, the size of containers for packages to be diversified, and efficient workability with a small turn when properly using these large and small containers. It is an object of the present invention to provide a film packaging apparatus having a flexible and easy-to-use structure.

In order to achieve the above object, the film packaging apparatus according to claim 1 of the present invention is provided with a heater base in front of a base on which a roll-shaped packaging film can be drawn, and behind the heater base. In a film packaging device in which a heater with a built-in heater wire protrudes upward with a width exceeding the entire width of the packaging film, and the heater is slidable in the horizontal direction of the heater base, the heater is attached to the heater case. A flat heater wire is stretched on the upper surface of the protruding base portion provided on the upper portion of the heater wire supporting base to be accommodated through a resin sheet, and the protruding base portion of the heater wire supporting base protrudes from the upper surface opening of the heater case. The heater wire is covered with a single-sided adhesive sheet on the upper surface of the heater case so that the heater wire is covered. It is protruded upward to the heater wire of the projecting stage of state from the upper opening of the case cover, as well as detecting the temperature of the heater wire by a temperature sensor provided on the heating wire supporting lifting platform, based on the detected temperature The temperature of the heater wire is controlled by a microcomputer so that the heater wire is kept at a predetermined temperature.

  A film packaging apparatus according to a second aspect of the present invention is the film packaging apparatus according to the first aspect, wherein the heater case is pivotally supported by a case support base slidably provided in the left and right lateral directions of the heater base, and the heater By pushing down the case, the energization detection device such as a micro switch and limit switch provided on the case support base is pushed to energize each heater wire, while having the same left and right elastic force provided inside each heater case The heater case is repelled upward by the elastic member to cut off the energization of each heater wire.

  According to a third aspect of the present invention, there is provided the film packaging apparatus according to the first or second aspect, wherein a plurality of convex portions protruding upward at predetermined intervals in the width direction of the upper surface of the heater base are formed, and the case support A sphere is engaged with a hole provided in the lower surface of the base, and the sphere protrudes in a state of being elastically urged downward from the hole, and supports the case when the heater case is slid to the left and right of the heater base. A spherical body projecting downward from the hole of the base is engaged with each convex part of the heater base, so that the heater case can be moved while being intermittently restrained from side to side.

  Furthermore, the film wrapping apparatus according to claim 4 of the present invention is characterized in that, in claim 1, 2 or 3, a waste outlet opened along the upper surface of the heater base is provided behind the heater base. And

  Moreover, the film packaging apparatus of Claim 5 of this invention is provided with the heater base in the front of the base which provided the roll-shaped packaging film so that drawing | extracting was possible, and the cutter which incorporated the heater wire behind this heater base was provided. In a film packaging apparatus in which the drawn packaging film is cut with a heated cutter by projecting upward with a width exceeding the entire width of the packaging film, a bottom case fixed to the upper surface of the heater base, and A case cover that covers the upper open portion of the bottom case, an inner cover that fits and secures inside the case cover, and a protruding base that protrudes upward from the left and right openings formed in the inner cover The case cover is formed with left and right opening windows that overlap each other with a slightly narrower area than the left and right openings formed in the inner cover. In the data line support base, front and rear groove portions are formed along the inner sides of the side portions provided on the front and rear side portions, and a resin sheet is laid on the protruding base portion formed between the front and rear groove portions, A plurality of heater wires arranged at intervals on the upper surface of the resin sheet are fixed by screwing both terminals of each heater wire at the groove portion of the heater wire support base, and the heater wires are mutually connected. In a state where all heater wires of each of the left and right heater wire support bases are covered with a single-sided adhesive tape and the protruding base portion of each heater wire support base protrudes from the left and right openings of the inner cover. In addition to fixing, the inner cover is fitted and fixed inside the case cover, so that each heater wire covered with the single-sided adhesive tape protrudes upward from the left and right opening windows of the case cover. Each heater wire support Covering the bottom case with the case cover through a plurality of elastic members arranged at the lower part of the peripheral portion enables the case cover to be pushed down elastically so that it can be energized and provided on the left and right sides of the bottom case. The apparatus is characterized in that a state in which the case cover is pushed down from above is detected by the apparatus and the heater wires are energized.

Furthermore, the film packaging apparatus according to claim 6 of the present invention is the film packaging apparatus according to claim 5, wherein the temperature of the heater wire is detected by a temperature sensor provided on the heater wire support base, and the temperature of the heater wire is determined based on the detected temperature. The heater wire is maintained at a predetermined temperature by being controlled by a microcomputer .

  The heater provided on the heater base of the film wrapping apparatus of the present invention has a flat heater wire stretched through a resin sheet on the upper surface of the protruding base provided on the heater wire support base accommodated in the heater case. The protrusion of the wire support base protrudes from the opening on the top surface of the heater case, and a single-sided adhesive sheet is detachably attached to the top surface of the heater case so that the heater wire is covered, and the case cover is placed on the top of the heater case. By covering, the heater wire of the protruding base portion covered with the adhesive sheet is protruded upward from the upper surface opening of the case lid.

  Therefore, since the flat heater wire provided on the upper surface of the protruding base portion is covered with a single-sided adhesive sheet from the upper surface opening of the case lid constituting the uppermost portion of the heater, the upper end surface of the heater is It is configured with almost no unevenness. For this reason, the present invention enables hygienic use as a structure in which dust such as moisture, oil or contents does not collect on the upper surface of the heater that heat-welds the bottom surface of the packaging film that wraps the packaged product. It is possible to efficiently perform the temperature control.

  Moreover, according to the configuration of the present invention, the dirt on the single-sided pressure-sensitive adhesive sheet can be easily wiped off with a cloth tool or the like. Furthermore, when replacing this single-sided adhesive sheet, it is possible to obtain a new state by simply removing the case lid, replacing the single-sided adhesive sheet with the upper surface of the heater case, and reattaching the case lid.

In the present invention, the temperature of the heater wire is detected by a temperature sensor provided on a heater wire support in the heater case, and the detected temperature is controlled by a microcomputer to keep the heater wire at a predetermined temperature. As a result, there is no problem of overheating the heater and disconnecting the heater power supply as in the conventional case, so that generation of CO ₂ and power consumption can be reduced and smooth packaging can be performed. It becomes possible.

  Furthermore, according to the film packaging apparatus of the fifth aspect, the left and right opening windows of the case cover that are pushed down elastically at the upper part of the bottom case fixed to the heater base are covered with the single-sided adhesive tape. Each heater wire in a state protrudes upward. In such a structure, the case cover is placed on the bottom case in a state where a plurality of elastic members are interposed at the lower part of the peripheral portion of each heater wire support base, and the case cover is provided by the energization detection devices provided on the left and right in the bottom case. It is possible to energize each heater wire by detecting the state where the heater is pressed from above. Therefore, by placing a packaged product to be packaged on the upper surface of the case cover, the heater wires can be energized to raise the temperature regardless of where the case cover is pressed.

  In addition, since the heater wires are covered with single-sided adhesive tape in both the left and right opening windows of the case cover, heaters for both the left and right opening windows are used according to the size of the packaged product. It is possible to freely select whether to use the heater of one opening window or not depending on the convenience of the worker. Therefore, it is possible to flexibly respond to changes in the size of the container of the packaged product, and it is used as a flexible, easy-to-use film packaging device that is required to use these large and small containers. It becomes possible.

  In addition, since each heater wire is covered with a single-sided adhesive tape in any of the left and right opening windows of the case cover, each heater can be made by using a material with excellent waterproof properties for this single-sided adhesive tape. It is possible to prevent water from entering the wire. For this reason, it is also possible to heat-weld the film of the packaged product to which moisture has adhered safely. Furthermore, even when the single-sided adhesive tape or its periphery is soiled, it can be cleaned cleanly with a cloth containing water.

Also in this film packaging apparatus, the temperature of the heater wire is detected by a temperature sensor provided on the heater wire support in the case cover, and the detected temperature is controlled by a microcomputer, so that the heater wire is brought to a predetermined temperature. It is possible to keep. Accordingly, there is no occurrence of problems such as overheating of the heater and disconnection of the heater power supply as in the prior art, so that generation of CO ₂ and power consumption can be reduced and smooth packaging can be performed. Become.

It is a whole perspective view regarding the film packaging apparatus of Example 1 by this invention. It is a longitudinal cross-sectional view regarding the film packaging apparatus of Example 1 by this invention. It is a disassembled perspective view regarding the heater used for the film packaging apparatus of Example 1 by this invention. (A)-(d) is a perspective view which shows the assembly procedure of the heater used for the film packaging apparatus of Example 1 by this invention. It is a whole perspective view regarding the film packaging apparatus of Example 2 by this invention. It is a longitudinal cross-sectional view regarding the film packaging apparatus of Example 2 by this invention. It is a whole perspective view which shows the state which removed the heater cover in the film packaging apparatus of Example 2 by this invention. It is a disassembled perspective view of the heater used for the film packaging apparatus of Example 2 by this invention. (A) is a top view of the heater wire support stand used for the film packaging apparatus of Example 2 by this invention, (b) is a side view.

  Embodiments of the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, the film packaging apparatus 1 of the present embodiment is provided with a heater base 3 in front of a base 2 on which a roll-shaped packaging film F can be drawn, and behind the heater base 3. A film wrapping apparatus 1 in which a cutter 5 having a built-in heater wire 4 is projected upward with a width exceeding the entire width of the packaging film F, and a heater 6 is slidable in the horizontal direction of the heater base 3. It is composed.

  The configuration of the present embodiment will be described in detail. As shown in FIG. 1 or 2, two film mounting rollers 7 a and 7 b are wound in the width direction of the base 2 in the vicinity of the rear end of the base 2 so as to be rotatable at predetermined intervals. Is provided. By rolling a roll 8 formed by winding a long strip-shaped film F between these two rollers 7a and 7b, the roll 8 freely rotates on the front and rear rollers 7a and 7b, and the film F The end can be pulled out freely.

  Further, in front of the front roller 7a, a work table 11 that rotates about a support shaft 10 supported on both side plates 9, 9 of the base 2 is provided to be openable and closable. In addition, at the front end of the work table 11, locking pieces 12, 12 are provided on both side plates 9, 9 of the base 2. Each locking piece 12 is pivotally supported on the side plate 9 of the base 2 by a shaft 12b, and is pulled by a coil spring 13, so that the locking piece 12 is biased to tilt backward around the axis. ing. With such a configuration, the side of the locking piece 12 is locked to the front end of the work table 11 in a closed state, and the locking piece 12a formed at the tip of the locking piece 12 is pressed to lock the locking piece. 12 is released from the front edge of the workbench 11 and the workbench 11 can be opened.

  Further, as shown in FIG. 2, a cover rail 14 is formed that rises upward along the front side of the work table 11 and has its tip suspended downward in the front. Below the cover rail 14, along the vicinity of the front side of the work table 11, a long rear roller 15 b is pivotally supported with respect to both side plates 9, 9.

  Further, a long cutter cover 17 is provided between the horizontal scissors 16 and 16 on both sides pivotally supported by the shaft 16a so as to be swingable with respect to the both side plates 9 and 9 of the base 2, and the horizontal scissors on both sides are also provided. A front roller 15a is pivotally supported at the rear ends of the 16 and 16 at a position in contact with the rear roller 15b. Further, the horizontal rods 16, 16 on both sides are configured to press the front roller 15 a against the rear roller 15 b by being pulled by the coil spring 18 against the both side plates 9, 9 of the base 2.

  With such a configuration, the work table 11 is opened, the film F drawn from the roll 8 is drawn from between the rear roller 15b and the front roller 15a through the lower side of the work table 11, and then the work table 11 is closed. The film F can be drawn upward while being sandwiched between the rear roller 15b and the front roller 15a.

  The cutter cover 17 is made of a stainless steel plate, and is provided along the entire width of the front roller 15a. A rear portion of the cutter cover 17 is formed with a bent portion 17a that is further bent in a horizontal state with a bottom surface raised. Thus, the long cutter cover 17 is configured to prevent bending. The cutter cover 17 functions as a waiter for the front roller 15a. That is, when the work table 11 is closed and the film F sandwiched between the front roller 15a and the rear roller 15b is pulled forward, the cutter cover 17 functions as a waiter that urges the front roller 15a to tilt forward. As a result, the front roller 15a is easily separated from the rear roller 15b against the tensile force of the coil spring 18, and the film F can be pulled out without difficulty.

  Further, a cutter 5 for cutting a film is fixed above the wiring board 19 between both side plates 9, 9 of the base 2. The cutter 5 bends the upper edge of the metal plate to store a nichrome wire (not shown), and the upper end of the cutter 5 protrudes slightly above the uppermost surface of the cutter cover 17 so that the front side surface of the cutter 5 is Functions as a protective plate to cover.

  Also, as shown in FIG. 1, both ends of the wiring board 19 are fixed to the both side boards 9 and 9 of the base 2 in an inclined manner below the cutter cover 17, and a rectangular shape is formed in front of the wiring board 19 as a boundary. A heater base 3 is formed. As shown in FIG. 2, the heater base 3 is formed with a locking edge 3 a that is bent downwardly acutely along the front edge thereof, and the rear side of the heater base 3 has the lower end of the wiring board 19 as the heater base. A gap 20 is provided by being separated from 3. The gap 20 functions as a dust outlet that is opened along the upper surface of the heater table 3 behind the heater table 3. A protective case 44 is provided between the side plates 9 and 9 inside the base 2, but a gap 52 is provided between the base 3 and the protective case 44, As shown by the arrows in FIG. 2, the dust falls downward through the gap 20 below the wiring board 19 and the gap 52 between the base 3 and the protective case 44.

  Further, as shown in FIG. 1, the heater cases 33 of the left and right heaters 6, 6 are formed in a long box shape, and are provided to be slidable in the horizontal direction of the heater base 3. In other words, two case support bases 21, 21 extending in the front-rear width of the heater base 3 are placed on the upper surface of the heater base 3, and folded downward along the front and rear ends of each case support base 21. The bent pieces 21a and 21b are formed, and the bent pieces 21a and 21b are engaged with the front and rear ends of the heater base 3, thereby making the case support base 21 slidable in the lateral direction of the heater base 3. Yes.

  Further, as shown in FIG. 1, a large number of arc-shaped convex portions 24, 24... Are formed in a circular ridge shape at predetermined intervals in the width direction of the upper surface of the heater base 3. On the other hand, as shown in FIG. 3, the spherical body 22 is engaged with a hole provided in the bottom surface of the case support base 21, and the spherical body 22 is elastically formed by fixing an end portion to the bottom surface of the case support base 21. By pressing from the upper side to the lower side on the free end side of the plate 23, the spherical body 22 protrudes in a state of being elastically biased downward from the hole portion of the case support base 21. The elastic plate 23 is formed with a sphere holding portion 23 a protruding upward, and the sphere holding portion 23 is fitted to the upper portion of the sphere 22 to position the sphere 22.

  With such a configuration, when the heater 6 is slid in the horizontal direction of the heater base 3, the spherical body 22 protruding downward from the hole of the case support base 21 is engaged with the convex portions 24, 24. As a result, the heater 6 can be moved while being intermittently stopped in the horizontal direction.

  Here, the structure of the heater 6 will be described. Since the left and right case support bases 21 and the heater case 33 provided on the heater base 3 have substantially the same configuration, the case support base 21 and the heater case 33 provided on the right side of the heater base 3 will be described. To do. As will be described later, it is possible to provide one heater or three or more heaters in addition to providing two heaters 6 on the left and right of the heater base 3.

  As shown in FIG. 3, the case support 21 is formed with bent pieces 21 a and 21 b that are bent downward at the front and rear ends of a long plate shape. The bent pieces 21 a and 21 b are engaged with the front and rear ends of the heater base 3, so that the case support base 21 can be slidably moved in the horizontal direction of the heater base 3. A hooking piece 21c is formed on the upper part of the front bent piece 21a.

  Further, side pieces 25, 25 are formed on both sides of the case support 21, and the left and right screw holes 26, 26 formed near the rear ends of these side pieces 25, 25 are located near the rear end of the heater case 33. The heater case 33 can be swung around the screw 28 within the range of the height of the hooking piece 21 c by combining the formed left and right screw holes 27 and 27 with the screw 28.

  Further, an energization detecting device 31 such as a microswitch is fixed to the rising piece 29 provided near the front of the bottom surface of the case support 21 with a screw 30, and a switch case 31a of the energization detecting device 31 is a heater case which will be described later. By being pressed against the lower surface of the heater wire support base 32 housed in 33, the energization detection device 31 detects energization. In addition to the above, the energization detection device 31 can use a limit switch, an optical sensor, an electromagnetic sensor, or the like.

  A sphere 22 is engaged with a hole provided in the bottom surface of the case support 21, and the sphere 22 is viewed from above on the free end side of the elastic plate 23 whose end is fixed to the bottom of the case support 21. The configuration that is pressed downward is as described above.

  As shown in FIG. 3, each heater 6 includes a case lid 34 that covers a heater case 33 formed in a long box shape from above, and a heater wire support base 32 that is housed and fixed inside the heater case 33. Have.

  The heater wire support base 32 is made of a resin plate member housed in the heater case 33, and a long protruding base part 35 is formed at the center of the upper part thereof, and along both sides of the protruding base part 35. Plate thickness portions 36 and 36 are formed, and screw holes 37 are formed at the front and rear ends of the plate thickness portions 36 on both sides. These screw holes 37 coincide with screw holes 38 formed on the four sides of the heater case 33, and can be fastened with screws 39 when the heater wire support base 32 is stored inside the heater case 33.

  In addition, a pair of flat thin heater wires 4 and 4 are stretched on the upper surface of the protruding base portion 35 of the heater wire support base 32 at left and right separated positions via a heat-resistant resin sheet 40 made of silicon or the like. Terminals 4 b having screw holes 4 a are connected to both ends of each heater wire 4, and screw holes 4 a of the terminals 4 b of each heater wire 4 are inserted into screw holes 41 formed at left and right spaced positions on the front and rear of the heater wire support base 32. And can be fixed with screws 42. The terminals 4b and 4b on the front end side of the left and right heater wires 4 are fixed with screws 42 through the copper plate 43, so that both heater wires 4 can be energized with good heat transfer. .

Further, a storage groove 46 for storing a temperature sensor 45 such as a thermistor is formed in the vicinity of the rear end of the protruding base portion 35 of the heater wire support base 32. In FIG. 3, the storage groove 46 is formed as a horizontally long groove so that the temperature sensor 45 can be stored in the horizontal direction, but the temperature sensor 45 such as a thermistor is stored in an upright state. In this way, it may be formed in a vertically long groove. In any case, the temperature of the heater wire 4 is detected by bringing a temperature sensor 45 such as a thermistor into contact with at least one heater wire 4. Although not shown, the detection result of the temperature sensor 45 is input to a microcomputer (not shown) provided inside the wiring board 19, and the temperature of the heater wire 4 is set to the temperature setting provided on the wiring board 19. By controlling the temperature to be set by the volume 46, it is possible to accurately control the temperature of the heater wire 4 to a constant temperature based on the result of directly detecting the temperature of the heater wire 4. As a result, overheating of the heater wires 4 is suppressed, and the temperature control of the heater wires 4 is efficiently performed, thereby reducing CO ₂ generation and power consumption.

  4A, as described above, a pair of flat thin heater wires 4 are stretched on the upper surface of the protruding base portion 35 of the heater wire support base 32 via a resin sheet 40 made of silicon or the like at left and right separated positions. Shows the state. As a procedure for assembling the heater case 33, as shown in FIG. 4B, the heater wire support base 32 is housed in the heater case 33, and the four screw holes 38 of the heater case 33 (see FIG. 3). The heater wire support base 32 is fixed in the heater case 33 by fastening the screws 39 to each other. At this time, the protruding base portion 35 of the heater wire support base 32 is protruded upward from the upper surface opening 33 a formed in the heater case 33.

  Next, a single-sided adhesive sheet 47 such as a Teflon (registered trademark) sheet is detachably attached to the upper surface of the heater case 33 so that the heater wire 4 is covered. Further, the case lid 34 is put on the upper part of the heater case 33 in such a state that the heater wire 4 is covered.

  The case lid 34 has a shape fitted to the upper portion of the heater case 33, and as shown in FIG. 3, a locking piece 34c bent inward is formed at the lower end of the side piece 34b at the rear end. The case lid 34 can be easily fitted to the upper portion of the heater case 33 by rotating the case lid 34 with the locking piece 34c hooked to the lower end portion 33b of the rear end of the heater case 33. it can. Further, the two screw holes 34e, 34e formed in the front piece of the case lid 34 and the two screw holes 33d, 33d on the front surface of the heater case 33 are aligned and fixed by fastening the screw 48. be able to.

  Furthermore, since the upper surface opening 34a is formed in the case lid 34 in the same manner as the upper surface of the heater case 33, the heater wire 4 of the protruding base 35 is covered with an adhesive sheet 47 as shown in FIG. In this state, the case lid 34 protrudes upward from the upper surface opening 34a. In this state, since the upper end surface of the heater 6 is configured with almost no unevenness, it can be used in a sanitary manner as a structure that does not collect moisture, oil, contents, or the like on the upper surface of the heater 6. In addition, the temperature control of the heater can be performed efficiently. The dirt on the single-sided adhesive sheet 47 can be easily wiped off with a cloth or the like. Furthermore, when replacing this single-sided adhesive sheet 47, it is possible to create a new state by simply removing the case lid 34, replacing the single-sided adhesive sheet 47 with the upper surface of the heater case 33, and reattaching the case lid 34. is there.

  Next, before the next assembly, coil springs and the like are provided in spring holes 32a and 32a formed on the lower surface of the heater wire support base 32 housed in the heater case 33 so as to be separated from each other as shown in FIG. The upper end of the elastic member 49 is fitted. Then, as shown in FIG. 4 (d), the heater case is formed by hooking an inwardly engaging piece 33c formed at the front lower end of the heater case 33 on the hook piece 21c provided on the front side of the case support 21. By rotating the rear side of 33 downward, the heater case 33 can be easily put on the outer sides of the side pieces 25, 25 on both sides of the case support 21.

  Furthermore, by screwing the left and right screw holes 27, 27 formed near the rear end of the heater case 33 with the screw holes 26 formed near the rear ends of the side pieces 25, 25 on both sides, The heater case 33 is swingably attached around the screw 28. At this time, since the elastic members 49, 49 such as coil springs are provided on the lower surface of the heater wire support base 32 in the heater case 33 so as to be separated from each other as described above, the lower ends of the left and right elastic members 49, 49 are provided. Is pressed by the bottom surface of the case support 21 and elastically supports the up and down movement of the heater case 33, so that the operation of pressing the heater case 33 from above can be returned by repelling upward.

  Since each heater 6 is configured as described above, when the heater 6 is pushed down, at least one of the energization detecting devices 31 such as a micro switch provided on the case support 21 is pushed to each heater wire 4. Energize. Further, each heater wire is turned off by turning off the energization detecting device 31 by repelling the heater case 33 upward by elastic members 49, 49 such as coil springs having equal elastic force left and right provided inside each heater 6. 4 is turned off.

  The nichrome wire (not shown) built in the cutter 5 and the energization detection device 31 are connected to a microcomputer (not shown) to adjust the temperature. Further, as shown in FIG. 1, the wiring board 19 is provided with a power switch 50, a pilot lamp 51, a temperature setting volume 46, and the like.

  In order to wrap a packaged product (not shown) with the packaging film F using the film packaging apparatus 1 configured as described above, the temperature is raised by energizing the cutter 5. Further, an unillustrated packaged product is placed on the work table 11 and the leading end of the film F pulled out between the front and rear rollers 15 a and 15 b is stretched on the working table 11. The packaged product is pulled out together with the film F in a state where the bottom of the packaged product is covered with a margin. In this state, since the film F covers the bottom surface of the packaged product, the packaged product is pulled forward until the film F overlaps the bottom surface of the packaged product, and the film F is pulled out and applied to the cutter 5 at an appropriate position. Thermally cut.

  Next, the end portions of the film F remaining on the left and right side portions of the packaged product are turned to the bottom surface of the packaged product so that the left and right end portions of the film F overlap on the bottom surface of the packaged product. When the bottom surface of the packaged product is pressed against the upper surface of each heater 6, the film F on the bottom surface of the packaged product is bonded by heat welding of the heater wire 4. In addition, even when moisture is contained in the bottom surface of the packaged product or the like, that is, even when moisture is contained in the place where the film F is attached, it has been confirmed that it can be well welded without any influence.

  In the present embodiment, the heater base 3 is provided with two heaters 6 on the left and right. However, one heater can be applied, and three or more heaters 6 can be applied. It is. For example, when the two heaters 6 and 6 are provided in the heater stand 3, it is good also as a structure which provided the electricity supply detection apparatus 31 and temperature sensors 45, such as a microswitch, only in the right heater 6. FIG. Furthermore, although each heater 6 is provided with two heater wires 4, one or three or more heater wires may be provided for each heater 6.

  As shown in FIGS. 5 and 6, the film packaging apparatus 1 of the present embodiment includes a base 2, a heater base 3, a cutter 5, a heater 6, film mounting rollers 7a and 7b, a front roller 15a, and a rear roller 15b. The structure relating to the horizontal rod 16, the heater base 3, etc. is the same as that of the first embodiment. Accordingly, in the film packaging apparatus 1 of the present embodiment, the heater base 3 is provided in front of the base 2 on which the roll-shaped packaging film F can be pulled out, as in the first embodiment. It has a structure of a film packaging apparatus that cuts the drawn packaging film F with the heated cutter 5 by projecting the cutter 5 having a heater wire in the rear upward with a width exceeding the entire width of the packaging film F.

  However, in the present embodiment, the upper surface of the heater table 3 may be a flat surface, and the bottom surface 54 of the bottom case 54 (see FIG. 7) constituting the heater 53 is formed on the upper surface of the heater table 3 with screws 53a, 53a. It has a fixed structure.

  That is, as shown in FIG. 7 or 8, the heater 53 of the present embodiment includes a bottom case 54 that is fixed to the upper surface of the heater base 3 and that is long in the lateral width direction, and a case cover that covers the upper open portion of the bottom case 54. 55, an inner cover 56 that is fitted and fixed inside the case cover 55, left and right openings 57a and 57b formed in the inner cover 56, and left and right opening windows 60a and 60b of the case cover 55. And a pair of heater wire support bases 58 and 58 having a projecting base portion 58a projecting upward from the head.

  In the above configuration, the bottom case 54 is formed in a rectangular box shape having a longer width than a depth width and an open top, and groove portions 54b and 54b are formed at intervals between the short side plates 54a and 54a at both ends. Is formed. Since the groove portions 54b and 54b are provided in the side plates 54a and 54a at both ends in this way, as shown in FIG. 7, the inner cover 56 is accommodated inside the lower portion of the case cover 55, and the four sides are fastened with screws 59. When 55 is placed over the bottom case 54, it is possible to avoid the tips of the four screws 59 from hitting the side plates 54 a and 54 a at both ends of the bottom case 54. Further, the case cover 55 can be covered with the case cover 55 above the bottom case 54, and the case cover 55 can be pushed down or the case cover 55 can be returned upward by the elastic member 70 described later.

  FIG. 8 is an exploded perspective view of the heater 53 of this embodiment. As shown in this figure, rectangular openings 57a and 57b are formed in the inner cover 56 on the left and right. The case cover 55 is formed with left and right opening windows 60a and 60b having an area slightly narrower than that of the left and right openings 57a and 57b of the inner cover 56. Since this case cover 55 covers the upper open portion of the bottom case 54 having the rectangular box shape with the inner cover 56 fitted inside the case cover 55, the case cover 55 and the inner cover The cover 56 is formed in a lid shape that is slightly larger than the outer shape of the bottom case 54.

  Further, in the above configuration, the side plates 55a and 55a on both sides of the case cover 55 are formed with screw holes 55b and 55b so as to be separated from each other in the front and back, and the side plates 56a and 56a on both sides of the inner cover 56 are separated from each other in the front and back. Thus, screw holes 56b and 56b are formed. In such a configuration, with the inner cover 56 fitted inside the lower portion of the case cover 55, screws 59, 59 are inserted into the screw holes 55 b, 55 b of the case cover 55 and the screw holes 56 b, 56 b of the inner cover 56. By screwing, the case cover 55 and the inner cover 56 can be fitted and fixed.

  Further, as described above, rectangular openings 57a, 57b are formed on the left and right sides of the upper surface of the inner cover 56, and screw holes 56b, 56b,... Are formed at the four corners of the openings 57a, 57b. The screws 61 are inserted into the screw holes 56b and screwed into the screw holes 58d, 58d... Formed in the side portions 58c, 58c on both sides of the heater wire support base 58. Each heater wire support 58, 58 can be fixed to the lower part of each opening 57a, 57b of the inner cover 56.

  The left and right heater wire supporters 58, 58 will be described in detail. As shown in FIGS. 9 (a) and 9 (b), the left and right heater wire support bases 58, 58 are formed in the same shape, and the protruding base portions 58a formed on the heater wire support bases 58 have inner covers. 56 is projected upward from the lower portion of the openings 57a and 57b and slightly upward from the respective opening windows 60a and 60b of the case cover 55 (see FIG. 7). The cover 55 is slightly protruded from the upper surface of the cover 55.

  Further, as shown in FIGS. 9A and 9B, the left and right heater wire support bases 58 have front and rear groove portions 58b along the inner sides of the side portions 58c and 58c provided on the front and rear sides. 58b is formed. In addition, a heat-resistant resin sheet 64 made of silicon or the like is laid on the upper surface of the projecting base portion 58a formed between the front and rear groove portions 58b and 58b, and arranged on the upper surface of the resin sheet 64 with an interval. A plurality of heater wires 65, 65... Are fastened with screws 67 at the grooves 58 b, 58 b of the heater wire support base 58. It is connected so that electricity can be supplied.

  Here, with reference to FIGS. 9A and 9B, the energization structure of each heater wire 65 in the left and right heater wire supporters 58 and 58 will be described. As described above, the left and right heater wire support bases 58, 58 have the same shape, and each heater wire support base 58 has, for example, five heater wires 65, 65. .. Are arranged at intervals, and both terminals 66 and 66 of the respective heater wires 65 are fastened with screws 67 to screw holes 58e (see FIG. 9B) formed in the grooves 58b and 58b on both sides. It is said. Further, in the heater wires 65 arranged in this manner, adjacent terminals 66 and 66 are connected to each other by a long thin current plate 68 made of copper or the like so that the heater wires 65 are connected in series. Each of the heater wires 65, 65... Is connected to the terminals 66, 66. The heater wires 65c and 65d provided adjacent to each other on the left and right heater wire support bases 58 and 58 are energized by connecting the terminals 66c and 66d with a current plate 68c.

  In such a connecting structure of the heater wires 65, an accommodation groove 69a is formed in the lower part of the second heater wire 65b from the upper end of the heater wire support 58 arranged in the upper part of FIG. A temperature sensor 69 such as a thermistor housed in the groove 69a is connected to the terminal 66a of the first heater wire 65a from the end of the heater wire support base 58 and the terminal 66b of the second heater wire 65b from the end of the heater wire support base 58. Are connected to each other, so that the temperature of all the heater wires 65, 65... Is detected. Further, the temperature of the heater wire 65 is detected by the temperature sensor 69, and the detected temperature is controlled by a microcomputer (not shown) so that all the heater wires 65, 65.

  Further, as shown in FIG. 8, a circular hole (not shown) is formed in the peripheral part of each heater wire support table 58 at least in the lower part of each direction, and an elastic member such as a coil spring is inserted into each circular hole. 70, 70... Are placed between the bottom case 54 and each heater wire support 58. The case cover 55 is covered with the bottom case 54, so that the case cover 55 is pushed down and elastic recovery is possible.

  Further, an energization detecting device 72 such as a micro switch is fixed to rising pieces 71 and 71 provided near both ends of the bottom surface of the bottom case 54, and a switch portion 72a of the energization detecting device 72 is attached to a case cover 55 described later. Each heater wire 65 can be energized by being pressed against the ceiling surface of the accommodated inner cover 56. In addition to the above, as the energization detection device 72, a limit switch, an optical sensor, an electromagnetic sensor, or the like can be used.

  In the configuration shown in FIG. 8, the heaters 53 are assembled by fixing the protrusions 58 a of the heater wire support bases 58 with the screws 61 in a state of protruding from the left and right openings 57 a and 57 b of the inner cover 56. . Next, the single-sided adhesive tapes 62, 62 are attached to the upper surfaces of the left and right heater wire support bases 58, 58 so that all the heater wires 65, 65... Are covered with the single-sided adhesive tapes 62, 62. To. Then, as shown in FIG. 7, when the inner cover 56 is fitted inside the bottom case 54 and fixed with screws 59, the left and right opening windows 60a, 60b of the case cover 55 are covered with single-sided adhesive tapes 62, 62. Each heater wire 65, 65...

  In such a configuration, the four sides of the single-sided adhesive tapes 62 and 62 covering the upper surfaces of the protruding base portions 58 a of the heater wire support bases 58 and 58 are pressed by the left and right opening windows 60 a and 60 b of the case cover 55. Therefore, each single-sided adhesive tape 62 is stored neatly, and is useful for preventing the peeling of each single-sided adhesive tape 62 and for improving the waterproofness of each single-sided adhesive tape 62.

  When using the film wrapping apparatus having such a heater structure, the case cover is in a state where a packaged product to be wrapped is pressed against one or both of the left and right opening windows 60a and 60b of the case cover 55. No matter where 55 is pressed down, either one or both of the left and right energization detection devices 72, 72 are energized, the heater wires 65 are energized and heated up, and the film of the packaged product is welded. Is possible.

On the other hand, as shown in FIG. 9, the detection result of the temperature sensor 69 provided on the heater wire support 58 is input to a microcomputer (not shown), and the temperature of each heater wire 65 is set to the temperature setting volume 46 provided on the wiring board 19. Control is performed so that the temperature is set in (see FIG. 5), and control is performed so that the temperature is accurately set to a constant temperature based on the result of directly detecting the temperature of the heater wire 65. As a result, overheating of each heater wire 65 is suppressed, and the temperature control of the heater wire 65 is efficiently performed, thereby reducing CO ₂ generation and power consumption.

  Furthermore, in the present embodiment, since the opening windows 60a, 60b are formed on the left and right sides of the case cover 55, depending on the size of the packaged product, the heaters of both the left and right opening windows 60a, 60b are used. Whether one of the opening windows 60a and 60b is used can be freely selected depending on the convenience of the operator. Therefore, it is possible to flexibly respond to changes in the size of the container of the packaged product, and it is used as a flexible, easy-to-use film packaging device that is required to use these large and small containers. It becomes possible.

  Moreover, since the heater wire 65 is covered with the single-sided adhesive tape 62 in any of the left and right open windows 60a, 60b of the case cover 55, the single-sided adhesive tape 62 is made of a material having excellent waterproofness. It is possible to prevent water from entering each heater wire 65 by using. For this reason, it is also possible to heat-weld the film of the packaged product to which moisture has adhered safely. Furthermore, even when the single-sided adhesive tape or its periphery is soiled, it can be cleaned cleanly with a cloth containing water.

The film packaging apparatus of the present invention enables hygienic use as a structure in which dust such as moisture, oil or contents does not accumulate on the upper surface of the heater that heat-welds the bottom surface of the packaging film that wraps the packaged product, Efficient temperature control of the heater reduces the generation of CO ₂ and power consumption, while satisfying the efficient workability of turning around when using large and small containers. An object is to provide an apparatus.

DESCRIPTION OF SYMBOLS 1 Film packaging apparatus 2 Base 3 Heater base 4 Heater wire 4a Screw hole 4b Terminal 5 Cutter 6 Heater 7a, 7b Film mounting roller 8 Roll 9 Side plate 10 Support shaft 11 Work table 12 Locking piece 12a Bending piece 13 Coil spring 14 Cover rail 15a Front roller 15b Rear roller 16 Horizontal rod 16a Shaft 17 Cutter cover 17a Bending part 18 Coil spring 19 Wiring board 20 Crevice (dust discharge port)
21 Case support 21a, 21b Folding piece 21c Hooking piece 22 Sphere 23 Elastic plate 23a Sphere holding part 24 Isolated convex part 25 Side piece 26 Screw hole 27 Screw hole 28 Screw 29 Standing piece 30 Screw 31 Current detection device 31b Switch Portion 32 Heater wire support base 32a Spring hole 33 Heater case 33a Upper surface opening 33b Lower end 33d Screw hole 33c Locking piece 34 Case lid 34a Upper surface opening 34b Side piece 34c Locking piece 34e Screw hole 35 Projection base 36 Plate thickness Part 37 screw hole 38 screw hole 39 screw 40 resin sheet 41 screw hole 42 screw 43 copper plate plate 44 protective case 45 temperature sensor 46 storage groove 47 single-sided adhesive sheet 48 screw 49 elastic member 50 power switch 51 pilot lamp 52 gap (dust removal) Exit)
53 Heater 53a Screw 54 Bottom case 54a Side plate 54b Groove 55 Case cover 56 Inner cover 56a Screw hole 57a, 57b Opening portion 58 Heater wire support base 58a Projection base portion 58b Groove portion 58c Side portion 58d Screw hole 58e Screw hole 59 Screws 60a, 60b Opening window 61 Screw 62 Single-sided adhesive tape 64 Resin sheet 65 Heater wire 66 Terminals 66a, 66b, 66c, 66d Terminal 67 Screw 68 Current plate 68, 68c Current plate 69 Temperature sensor 69a Storage groove 70 Elastic member 71 Standing piece 72 Current detection Device 72a Switch part

Claims (6)

A heater base is provided in front of a base on which a roll-shaped packaging film can be pulled out, and a cutter with a built-in heater wire is projected upward with a width exceeding the entire width of the packaging film behind the heater base. On the other hand, in the film wrapping apparatus in which the heater is slidably mounted in the horizontal direction of the heater base, the heater has a resin sheet on the upper surface of the protruding base provided on the heater wire support base accommodated in the heater case. The heater wire is covered with a flat heater wire, and the protruding portion of the heater wire support base protrudes from the upper opening of the heater case, and a single-sided adhesive sheet is detachably attached to the upper surface of the heater case. Put the case lid on the top of the heater case, and the heater wire on the protruding base covered with the adhesive sheet protrudes upward from the top opening of the case lid. Was made by, as well as detecting the temperature of the heater wire by a temperature sensor provided on the heating wire support stand, by controlling the temperature of the heater wire in the microcomputer on the basis of the detected temperature, so as to keep the heater wire to a predetermined temperature A film wrapping apparatus characterized by that.   The heater case is pivotally supported by a case support base that is slidable in the horizontal direction of the heater base, and the micro switch and limit switch provided on the case support base by pushing down the heater case. While energizing each heater wire by pushing an energization detecting device such as a heater, the heater case is repelled upward by an elastic member having an equal elastic force provided in the left and right to energize each heater wire. The film packaging apparatus according to claim 1, wherein the film packaging apparatus is cut.   A large number of protrusions are formed protruding upward at a predetermined interval in the width direction of the upper surface of the heater base, and a sphere is engaged with a hole provided in the lower surface of the case support base. When the heater case is slid to the left and right of the heater base, the sphere protruding downward from the hole of the case support base engages with each convex part of the heater base. The film packaging apparatus according to claim 1 or 2, wherein the heater case can be moved while being intermittently restrained to the left and right.   The film packaging apparatus according to claim 1, 2 or 3, wherein a dust discharge opening opened along the upper surface of the heater base is provided behind the heater base. A heater base is provided in front of a base on which a roll-shaped packaging film can be pulled out, and a cutter with a built-in heater wire is projected upward with a width exceeding the entire width of the packaging film behind the heater base. In the film wrapping apparatus in which the drawn packaging film is cut with a heated cutter,
A bottom case fixed to the upper surface of the heater base, a case cover that covers the upper open portion of the bottom case, an inner cover that fits and is fixed to the inside of the case cover, and left and right formed on the inner cover A heater wire support base that fixes the protruding base portion so as to protrude upward from each opening,
The case cover is formed with left and right opening windows that overlap with a slightly narrower area than the left and right openings formed in the inner cover,
Each of the left and right heater wire support bases is formed with front and rear groove portions along the inside of the side portions provided on the front and rear side portions, and a resin sheet is laid on the protruding base portion formed between the front and rear groove portions. A plurality of heater wires arranged at intervals on the upper surface of the resin sheet are fixed by screwing both terminals of each heater wire at the groove portion of the heater wire support base, and each heater wire is Connected to each other so that they can be energized,
While fixing all the heater wires of each of the left and right heater wire support bases with a single-sided adhesive tape, the protrusion base portion of each heater wire support base is fixed in a state of protruding from the left and right openings of the inner cover, and the inner cover By fitting and fixing the inside of the case cover, each heater wire in a state covered with the single-sided adhesive tape is projected upward from the left and right opening windows of the case cover,
Furthermore, the case cover can be pushed down to be elastically restored by covering the case cover with a plurality of elastic members arranged at the lower part of the peripheral portion of each heater wire support base, and in the bottom case. A film packaging apparatus, wherein a current detection device provided on the left and right detects a state in which a case cover is pushed down from above and energizes each heater wire. The temperature of the heater wire is detected by the temperature sensor provided on the heater wire support base, and the heater wire is kept at a predetermined temperature by controlling the temperature of the heater wire with a microcomputer based on the detected temperature. The film packaging apparatus according to claim 5, characterized in that: