JP6829885B2 - Sealing device for deep drawing packaging machines - Google Patents

Description

The present invention relates to a sealing device for a deep drawing packaging machine.

As one of various packaging forms, there is a deep-drawn type packaging body. The deep-drawn package has a structure including a container body having a storage recess for storing the product and a lid member for closing the opening of the container body with the product stored in the storage recess. A deep-drawing packaging machine that manufactures a deep-drawing type packaging body having such a configuration has the following configuration.

The lower film for forming the container body continuously drawn from the raw film is conveyed in the horizontal direction. The film transporting device for transporting in the horizontal direction has a configuration in which, for example, both end edges of the lower film are gripped and clamped by a claw member attached to an endless chain extending in the transport direction. Along with the rotation of the endless chain, the claw member also revolves around a predetermined trajectory and conveys the lower film clamped to the claw portion.

The lower film is vacuum-sucked by a molding device arranged during the transportation of the lower film to form a storage recess protruding downward at a predetermined position of the lower film. Then, the product is automatically or manually supplied into the storage recess at a predetermined position on the downstream side of the molding apparatus.

On the other hand, another raw film is installed above the transport line of the lower film, and the upper film for continuously forming the lid member is pulled out from the raw film, and the pulled out upper side thereof. The film is superposed on the lower film at a predetermined position on the downstream side of the supply point of the product.

Further, a sealing device is arranged on the downstream side of the polymerization point of both films, and the sealing device seals the contact portion between the upper film and the lower film. As a result, the product is sealed in the storage recess. After that, a cutter device arranged on the downstream side of the sealing device cuts the sealing portions of both films so that the individual deep-drawn packages are separately manufactured. This type of deep drawing packaging machine is disclosed in Patent Document 1 and the like. Further, in this sealing device, prior to performing the sealing process, a vacuum is drawn to suck and remove the air in the storage recess formed in the lower film, and the film is brought into close contact with the product for vacuum packaging. The sealing device having such a vacuuming function is also referred to as a vacuum chamber.

JP 2014-114036

The sealing device includes an upper box and a lower box that sandwich the upper film and the lower film from above and below. The upper box includes, for example, a bridge having a recess on the lower surface, a heating plate mounted in the recess of the bridge, a sealer, and the like. The sealing surface of the sealer is formed so that the sealing portion of the upper film and the lower film other than the storage recess is heated. Therefore, when the size and shape of the package are changed, for example, when the product to be packaged is changed, the layout of the storage recess formed in the lower film is also changed, and it is necessary to replace the sealer with a sealer that matches the layout. The dimensional shape of the sealer corresponds to the dimensional shape of the recess of the upper box. For example, if the dimensional shape of the sealer is short, it may not be mounted.

The above-mentioned problems are described as independent of each other, and the present invention does not necessarily have to be able to solve all of the described problems, as long as at least one problem can be solved. In addition, we have the intention to acquire the rights to the structure for solving this problem independently by divisional application, amendment, etc.

In order to solve the above-mentioned problems, the sealing device for a deep drawing packaging machine of the present invention includes (1) a lower box and an upper box that are arranged to face each other with the laminated lower film and the upper film sandwiched between them. The upper box is a sealing device used in a deep drawing packaging machine, and the upper box has a sealing surface corresponding to a bridge having a recess on the lower surface and a storage recess formed in the lower film to be stored in the recess. When the sealer is housed in the recess, the sealing surface is exposed from the lower opening of the recess, and the sealer is inside the recess via a holder. so as to be accommodated in the holder, a frame body which center is opened, protrudes toward from the inner peripheral surface of the post front in the conveying direction of the lower film of the inner peripheral surface of the frame body at the center The sealer is provided with a pair of supports so that the sealer is mounted in the recess with a set of both side edges supported by the pair of supports.

Since the sealer is stored in the recess via the holder, for example, even if the outer dimension of the sealer is smaller than the opening of the recess, the distance between the pair of support portions of the holder is narrowed according to the outer dimension. By doing so, the sealer can be stored in the recess without falling from the recess. Further, since the sealer is mounted via the holder, for example, the holder can be tightened and urged and fixed by pinching or the like so that the urging force is not applied to the sealer. Furthermore, if it is desired to raise or lower the sealer during the sealing process, it may be possible to handle it by mounting the sealer so that it can be raised or lowered with respect to the holder even when the holder is fixed.

In the embodiment, the support portion corresponds to the support plate portion 48b, but it is not always necessary to form a single plate shape as in the embodiment, and a plurality of rod-shaped bodies such as comb teeth are projected. It may be configured. It is better to use a single plate as in the embodiment because it can be held firmly and gaps can be eliminated. Further, the support portion of the holder only needs to be able to support the sealer, and does not necessarily have to be in constant contact with the support portion. For example, when operating as a sealing device as in the embodiment, It may be separated from the support portion.

(2) When replacing the lower film with another sealer having a different length in the direction along the transport direction, it is preferable to mount the lower film in the recess by using a holder having a different distance between the pair of support portions. .. In this way, for example, when the external dimensions of the sealer change due to the change of the product to be packaged, for example, when a sealer having a short length in the direction along the transport direction is used, a pair of holders in use If the distance between the support portions is wider, the sealer cannot be supported, but it can be supported by using holders having different distances between the pair of support portions according to the length of the sealer. Therefore, for example, by setting the inner dimension of the recess, more specifically, the length in the direction along the transport direction of the lower film to be longer, the range that can be changed by the product can be expanded.

(3) The holders having different distances between the pair of support portions may be holders made of different members or holders having adjustable lengths of the support portions. The adjustable length of the support portion may mean, for example, a structure in which the support portion expands and contracts, or an attachment attached to the support portion of the base to change the length. If the holder has an adjustable length, the holder can be shared and only the sealer needs to be replaced, but it is preferable to use another holder because the structure of the holder becomes simple.

(4) The bridge has a rack that can be pulled out in a direction intersecting the transport direction of the lower film, and the sealer is mounted on the rack via the holder. It is advisable to store the sealer in the recess.

Since the bridge is equipped with a rack that can be pulled out to the outside and the sealer is mounted on the rack, when replacing the sealer, the rack is pulled out from the bridge and the sealer is exposed to the outside. It can be exchanged. It is not necessary to remove the entire upper box, and the sealer can be easily replaced.

(5) A heating portion is arranged in the recess, and the sealer housed in the recess is connected with its upper surface in contact with the heating portion, and the replacement of the sealer releases the connection. It is preferable to carry out the operation in a state of being separated from the heating portion.

According to the present invention, for example, even if the sealer has a shorter length in the direction along the film transport direction than the size and shape of the lower opening of the recess of the bridge, the sealer can be attached via the holder.

It is a front view which shows one preferable embodiment of the deep drawing packaging machine which mounts the sealing device for a deep drawing packaging machine which concerns on this invention. It is a front sectional view which shows one preferable embodiment of the sealing device for a deep drawing packaging machine which concerns on this invention. It is a side sectional view thereof. It is the perspective view. The operation / function is an explanatory diagram (No. 1). It is explanatory drawing (part 2) of operation and function. It is explanatory drawing (part 3) of operation and function.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. The present invention is not construed as being limited to this, and various changes, modifications, and improvements can be made based on the knowledge of those skilled in the art without departing from the scope of the present invention.

FIG. 1 shows a preferred embodiment of a deep-drawing packaging machine to which the sealing device for the deep-drawing packaging machine according to the present invention is mounted. This deep drawing packaging machine includes a lower film supply device 10 arranged on the upstream side, a film transfer device 13 for horizontally transporting the lower film 12 supplied from the lower film supply device 10, and a film transfer device. A molding device 14 arranged on the upstream side during transportation of the film 13, a product supply unit (not shown) arranged on the downstream side of the molding device 14, and an upper film supply device arranged at a predetermined position above the film transfer device 13. 15 and a sealing device 17, a horizontal cutter device 18, a vertical cutter device 19, etc., in which the upper film 16 supplied from the upper film supply device 15 is sequentially arranged on the downstream side from the coating point covered on the lower film 12. Be prepared.

The lower film supply device 10 is pulled out from a rotation support shaft 21 that supports the raw fabric roll 20 that is a roll of the strip-shaped lower film 12 and a raw fabric roll 20 that rotates integrally with the rotation support shaft 21. The lower film 12 is fed out along a predetermined trajectory and supplied to the film transport device 13.

The film transport device 13 includes a pair of left and right endless chains 13a arranged on the outside of both side edges of the lower film 12, and a large number of claw members 13b attached to the endless chains 13a. The lower film 12 is intermittently conveyed while grasping both edges in the longitudinal direction.

A molding device 14 is arranged on the upstream side of the film transport device 13 during transport. The molding device 14 is a device for molding a storage recess 12a projecting downward at a predetermined position of the lower film 12. The molding apparatus 14 has an upper box 14a and a lower box 14b arranged vertically with the lower film interposed therebetween. Then, in the lower box 14b, a female mold processed into an inner shape that matches the outer shape of the storage recess 12a formed in the lower film 12 is arranged. On the other hand, a hot plate is built in the upper box 14a, and the film portion of the lower film 12 sandwiched between the upper box 14a and the lower box 14b is heated and softened. Then, in the sandwiched state, for example, the inside of the lower box 14b is vacuum-sucked, a predetermined film portion of the lower film 12 is in close contact with the inner peripheral surface of the female mold, and the film is molded into the shape of the inner peripheral surface and stored. Mold the recess 12a. In the present embodiment, the lower box 14b is provided with two recesses on the side, and a predetermined number of storage recesses 12a are molded with respect to the lower film 12 in one molding process.

The product supply unit is an area for supplying products in the storage recess 12a formed by the molding device 14, and for example, a product supply device (not shown) is arranged. This product supply device automatically supplies products into the storage recess 12a. For example, the product supply device is composed of a transfer robot and includes suction means as a manipulator of the transfer robot. Then, by the suction means, a predetermined product is sucked and held from the product group waiting next to the film transport device 13 and moved in a predetermined trajectory, and the product is supplied into the storage recess 12a. In addition, instead of the product supply device, it may be supplied manually.

The upper film supply device 15 is drawn from a rotation support shaft 23 that supports the original fabric roll 22 that is a roll of the strip-shaped upper film 16 and an original fabric roll 22 that rotates integrally with the rotation support shaft 23. A plurality of rollers 24 and the like for feeding the film 16 along a predetermined trajectory and supplying the film 16 so as to be overlapped on the lower film 12 conveyed by the film conveying device 13 are provided. Although not shown, for example, a printing device is arranged in the middle of the movement locus of the upper film 16. The printing device prints the date of manufacture of the product, the expiration date, and the like at a predetermined position on the upper film 16.

The sealing device 17 sandwiches the contact portions of the lower film 12 and the upper film 16 at predetermined positions, that is, the contact portions of the films 12 and 16 around the storage recess 12a from above and below, and heats and seals them. As a result, the product is sealed in the storage recess 12a. Further, this sealing device 17 has a function of sucking and removing the air in the storage recess 12a, and by sucking and removing the air in the storage recess 12a before heat-sealing both films 12 and 16, the product can be stored in the storage recess 12a. It may be a sealing device (vacuum chamber) having a function of sealing in a vacuum state inside.

The horizontal cutter device 18 includes a cutter blade 18a and a receiving plate 18b which are arranged vertically with the film in between. The cutter blades 18a and the receiving plate 18b are configured to move up and down in time with each other by an air cylinder 18c linked to each other. The horizontal cutter device 18 is a push-cut cutter, and the lower and upper films 12 and 16 are cut along the shape of the blade portion of the cutter blade 18a. The cutter blade is provided with a linear blade for cutting the lower and upper films in the lateral direction (direction orthogonal to the transport direction), and also forms rounded corners in the final package. A blade for R-cut may be provided for this purpose.

The vertical cutter device 19 includes a plurality of pairs of upper and lower disk-shaped cutters 19a having rotation axes in a direction orthogonal to the film conveying direction, and sandwiches the lower and upper films 12 and 16 between the upper and lower cutters 19a. This cuts parallel to the transport direction. When passing through the vertical cutter device 19, the periphery of the storage recess 12a is cut vertically and horizontally to manufacture individual packages. Further, the left and right side edges of the lower and upper films 12 and 16 are cut and separated by the vertical cutter device 19. Then, the separated both side edges are taken up by the take-up roller 27.

The sealing device 17 includes a lower box 31 and an upper box 32 that are vertically opposed to each other with the lower and upper films 12 and 16 interposed therebetween, and the lower box 31 moves up and down according to the film transfer timing. .. The lower box 31 includes a box-shaped box body 33 with an open top. Similar to the lower box 14b of the molding apparatus 14, the box body 33 is provided with one recess 35 in the left-right direction orthogonal to the film transport direction and five recesses 35 in the front-rear direction on the upper surface side thereof. In the recess 35, the storage recess 12a of the lower film 12 formed by the molding apparatus 14 is inserted and arranged during the sealing process. Further, the receiving rubber 37 is attached to the upper surface of the box body 33, that is, the upper surface of the peripheral wall 36 arranged around the recess 35.

On the other hand, the upper box 32 has a recess 34a on the lower surface side of the bridge 34, and includes a heating plate 40 and a sealer 38 arranged so as to be able to move up and down in the recess 34a. The heating plate 40 and the sealer 38 are stacked one above the other, and are connected and integrated by, for example, a screw 41 in a state where the upper surface of the sealer 38 is in contact with the lower surface of the heating plate 40 located above. The heat of the heating plate 40 is conducted to the sealer 38, and the lower surface of the sealer 38 is heated. Further, the sealer 38 is linked to the bridge 34 by, for example, a screw 41. Further, a through hole 34b is formed at a portion of the bridge 34 facing above the screw 41 connecting the heating plate 40 and the sealer 38, and the lid screw 42 is attached to the through hole 34b. When the lid screw 42 is removed, the upper end of the screw 41 is exposed through the through hole 34b, and the screw can be operated.

Then, by raising the lower box 31, the lower and upper films 12 and 16 are sandwiched from above and below. More specifically, the film is sandwiched between the lower surface of the sealer 38 and the receiving rubber 37 provided on the upper surface of the box body 33 facing the sealer 38. It is also possible to adopt a configuration in which the entire upper box 32 moves up and down. Further, the sealer 38 may be integrated with the heating plate 40 or the like to move up and down in the bridge 34.

The sealer 38 is made of a material having good thermal conductivity such as aluminum, and is heated to a predetermined temperature by a heater built in the heating plate 40. Then, as described above, in a state where the lower and upper films 12 and 16 are sandwiched between the upper box 32 and the lower box 31, the lowered upper box 32 comes into contact with the film and heats the film. That is, since the film portion sandwiched between the receiving rubber 37 and the film portion is heated and pressurized, the film portions of the lower and upper films 12 and 16 are heat-sealed.

Further, a recess 38a is formed at a predetermined position on the lower surface of the sealer 38, and the film holding plate 39 is arranged in the recess 38a. The forming position of the recess 38a (film holding plate 39) is a position facing the recess 35 formed in the box body 33 of the lower box 31, and the planar shape thereof is substantially the same as the planar shape of the recess 35. There is. As a result, during the sealing process, the film holding plate 39 comes into contact with the film portion of the upper film 16 facing the storage recess 12a. The film holding plate 39 has low thermal conductivity, making it difficult for the heat of the sealer 38 to be transferred to the film portion of the upper film 16 in contact with the film holding plate 39, so that the film holding plate 39 is not heated.

As described above, on the lower surface of the sealer 38, a recess 38a corresponding to the arrangement layout of the recess 35 of the box body 33 of the lower box 31 is formed, and the film holding plate 39 is arranged in the recess 38a. doing. Therefore, for example, when the dimensional shape of the package manufactured by this deep-drawing wrapping machine is changed, the dimensional shape and arrangement layout (N × M) of the recess 35 of the box body 33 are also changed accordingly, and the sealer is further changed. It will be necessary to change the dimensional shape and arrangement layout (N × M) of the recess 38a of the 38. When replacing the upper box 32 side, for example, the entire heating plate 40 and sealer 38 have been replaced in the past, but in the present embodiment, only the sealer 38 is replaced, and the heating plate 40 is a different type of sealer. It was made to be used in common for 38. As a result, many components are shared.

Further, in the present embodiment, the upper box 32 is provided with a rack 45 that can be pulled out on the front side of the deep drawing packaging machine, and the sealer 38 can be pulled out toward the front side by using the rack 45. When the rack 45 is pulled out toward the front side, the space above the rack 45 is vacant, so that the sealer 38 can be easily taken out and a new sealer 38 can be installed. The specific structure for realizing the withdrawal method is as follows.

As shown in FIG. 7 and the like, the rack 45 includes a bottom plate 45a that is rectangular and has a rectangular opening 45c in the central portion, and side walls 45b that stand up on a pair of long sides of the bottom plate 45a, and the pair of short sides are It has an open shape with no side walls. The bottom plate 45a and the side wall 45b can be formed by using, for example, one metal plate (for example, stainless steel) and bending both sides of the metal plate by, for example, pressing.

The rack 45 can be moved in and out of the bridge 34 along the long side, that is, the side wall 45b. Along with this, as shown in FIG. 3 and the like, a guide groove 34c into which the side wall 45b is inserted is formed on the lower surface of the bridge 34. As shown in FIGS. 6 and 7, the guide groove 34c opens toward the front side of the deep drawing packaging machine. Further, one end of the slide rail 46 is fixed above the inner surface of the side wall 45b, and the other end of the slide rail 46 is fixed at a predetermined position on the inner surface of the guide groove 34c. As a result, the side wall 45b is guided by the slide rail 46, moves in the guide groove 34c, and when the side wall 45b is completely pulled out toward the front side, the entire rack 45 is as shown in FIGS. It is located on the front side of the bridge 34, and the bridge 34 and the like do not exist above the rack 45.

Further, the length of the side wall 45b is longer than the length of the long side of the bottom plate 45a (see FIG. 6 and the like), and both ends of the side wall 45b are in a state of protruding outward from the bottom plate 45a. Further, a plurality of (for example, two on each side) positioning pins 45d are formed upright on the upper surface of the bottom plate 45a along the long side.

In the present embodiment, the sealer 38 is not directly mounted on the rack 45, but is mounted via the holder 48. The holder 48 includes a thick frame body 48a and a pair of support plate portions 48b formed so as to project from the lower end side of the inner peripheral surface of the pair of long sides of the frame body 48a toward the inner center. Be prepared. An opening is formed between the pair of left and right support plate portions 48b. The sealer 38 is provided with eaves 38b protruding outward at the upper ends of the pair of long sides, and when the sealer 38 is placed on the holder 48, the main body portion of the sealer 38 is between the support plate portions 48b. It enters the space, and the eaves portion 38b comes into contact with the upper surface of the support plate portion 48b to be supported, and further detachment / drop is suppressed. Further, the sealer 38 is characterized in that it is not fixed to the holder 48 with screws or other fixing means. As a result, the sealer 38 does not fall below the support plate portion 48b, but can be raised and lowered relative to the holder 48. While the packaging machine is in operation, the sealer 38 is connected and integrated with the heating plate 40 by screws 41 as described above. In this state, as shown in FIG. 3, the eaves portion 38b is separated from the upper surface of the support plate portion 48b and is located at a predetermined position above.

Further, the holder 48 is provided with a notch 48c on the outer peripheral surface of the pair of long sides of the frame body 48a. The notch 48c is formed at a position corresponding to the positioning pin 45d, and when the holder 48 is mounted on the rack 45, the positioning pin 45d enters the notch 48c to perform positioning in a horizontal plane. Be done. The holder 48 is only placed from above with respect to the rack 45, and is not fixed with screws or the like. Therefore, it is fixed in the horizontal plane by the four positioning pins 45d and the notch 48c, and the movement in the vertical direction is allowed. The pair of short side side surfaces of the holder 48 are provided with a reverse tapered surface 48d having a shape in which the lower end side is cut off.

On the other hand, the fixing receiver 50 is arranged on the back surface (the back side of the deep drawing packaging machine) of the recess 34a of the bridge 34. The fixed receiver 50 has a tapered surface 50a that can come into contact with the reverse tapered surface 48d provided on the short side on the back side of the pair of short sides of the holder 48. When the rack 45 on which the holder 48 is placed is inserted all the way, the reverse tapered surface 48d of the holder 48 and the tapered surface 50a of the fixed receiver 50 are in contact with each other.

Further, with the rack 45 housed in the bridge 34, the fixture 51 is attached to the front side thereof. The fixture 51 has a rectangular parallelepiped main body, and a tapered surface 51a is provided below one side surface (the surface facing the holder 48) of the main body. When the fixture 51 is inserted into the bridge 34, the tapered surface 51a of the fixture 51 comes into contact with the reverse tapered surface 48d of the holder 48, and when it is pushed further inward from that state, it is fixed. The tapered surface 51a of the tool 51 penetrates further into the interior, and the holder 48 rises due to the action of the tapered surface 50a and the reverse tapered surface 48d. At this time, the same effect occurs between the tapered surface 50a of the fixed receiver 50 on the back side and the reverse tapered surface 48d on the back side. As a result, as shown in FIG. 2 and the like, the support plate portion 48b of the holder 48 is separated from the bottom plate 45a of the rack 45 and is in a raised state, and in that state, the fixture 51 is fixed to the bridge 34 with screws.

Further, in the present embodiment, cylinders 53 are arranged near the four corners of the lower surface of the bridge 34, and the cylinder rod 53a of the cylinder 53 is linked to and supported by the lower surface of the bridge 34 via the connecting rod 54. Then, it has a function of operating the cylinder 53 and raising and lowering the bridge 34 and the entire upper box 32. As shown in FIG. 2, while the sealing device 17 is operating, the lower surface position of the sealer 38 and the holder 48 is lower than the upper end edge of the film transport device 13 including the endless chain 13a and the claw member 13b, and that state. If the rack 45 is to be pulled out to the front side (left side in FIG. 2) of the deep drawing packaging machine as it is, it interferes with the film conveying device 13 and cannot be pulled out. Therefore, since the upper box 32 can be raised and lowered as a whole by the four cylinders 53 as in the present embodiment, for example, by raising the upper box 32 from the state of FIG. 2 by a predetermined distance where the interference does not occur. The rack 45 and thus the sealer 38 can be pulled out by utilizing the space above the film transport device 13.

Further, the bridge 34 is bolted to the fixing plate 55 linked to the machine frame. The bolt is inserted into the bottomed through holes 34d provided near the four corners of the bridge 34, and the threaded portion at the tip of the bolt is fastened to the female threaded portion 55a (see FIG. 5 and the like) formed in the fixing plate 55. As a result, the bridge 34 is connected and integrated with the fixing plate 55 and fixed there.

Next, the operation at the time of replacement of the sealer 38 in the sealing device 17 of the above-described embodiment will be described. First, from the initial state when the sealing device 17 shown in FIG. 4 is normally operated, the bolts at the four corners connecting the bridge 34 and the fixing plate 55 are removed to release the fixing of the bridge 34. Further, the screw 41 at the center is removed, and the bridge 34 and thus the heating plate 40 and the sealer 38 are connected. Along with this, the sealer 38 separates from the heating plate 40 and falls downward, and the eaves portion 38b of the sealer 38 is in a state of being supported by the support plate portion 48b of the holder 48.

Next, the fixing screw of the fixture 51 is removed. Then, the force that sandwiches and fixes the holder 48 between the fixture 51 and the fixture 50 is released, so that the weight of the holder 48 and the sealer 38 supported by the holder 48 and the tapered surfaces 50a and 51a Due to the action of the reverse tapered surface 48d, the holder 48 / sealer 38 descends while pushing the fixture 51 outward, and the frame body 48a of the holder 48 comes into contact with the bottom plate 45a of the rack 45 and is suspended. It becomes.

The cylinder 53 is operated at an appropriate timing in the process so far, and the entire upper box 32 is raised together with the bridge 34. As shown in FIG. 5, the ascending movement distance may be small, and it is sufficient that the lower surface position of the rack 45 or the like is located above the upper end edge of the film transport device 13.

Then, when the rack 45 is pulled out toward the front, as shown in FIG. 6, the holder 48 and the sealer 38 supported by the rack 45 are also pulled out together. Since the holder 48 and the sealer 38 are only placed on each other, the sealer 38 and the holder 48 can be removed in this order (see FIG. 7).

For example, when the size and shape of the package to be manufactured does not change the length (packaging pitch) of the film in the transport direction and the width in the direction orthogonal to the transport direction changes, it is formed on the box body 33 of the lower box 31. The number of recesses 35 in the orthogonal direction changes, but the packaging pitch does not change. Therefore, although the number of recesses 38a provided on the lower surface of the sealer 38 changes, the external dimensions do not change, so that the holder 48 can be used as it is, and only the sealer 38 is replaced.

On the other hand, when the packaging pitch also changes, the length of the sealer 38 changes along the film transport direction, and it cannot be inserted into the space between the pair of support plate portions 48b of the holder 48 currently in use, or the space is large and supports. Sometimes I can't. In such a case, a holder 48 having an opening corresponding to the size and shape of the sealer 38 is prepared, and both the sealer 38 and the holder 48 are replaced.

If the sealer 38 alone or together with the holder 48 is replaced and installed in place on the rack 45, the rack 45 is returned into the bridge 34, the fixture 51 is pushed in and screwed to raise the holder 48. And fix it in the desired position. After that, the initial state is restored by executing the reverse procedure of the above.

In the present embodiment, since the rack 45 is freely connected to the bridge 34 via the slide rail 46, the rack 45 is easily pulled out to expose the sealer 38 and the like to the outside of the bridge 34, and the rack 45 is exposed. The sealer 38 or the like placed on the top can be returned to the inside of the bridge 34, and since the upper space is open in the exposed state, the sealer 38 or the like can be easily attached and detached. Therefore, the replacement work of the sealer 38 and the like can be easily performed.

Further, the holder 48 can be fixed at a desired position by pushing the fixture 51, and the fixing can be released by releasing the push of the fixture 51. Therefore, even in view of the above points, the replacement work of the sealer 38 or the like can be performed. Easy to do.

Further, in the present embodiment, since the sealer 38 is attached to the rack 45 via the holder 48, even if the packaging pitch is different, the holder 48 can be replaced together.

In the above-described embodiment, since the sealer 38 is mounted on the rack 45 via the holder 48, the sealer 38 is made of a material having good thermal conductivity even when the pitch is not changed. Cover the part that seals the flat shape of 38 in contact with the film so that it is not made larger than necessary, and separate the part that does not affect heating and sealing, such as the fixing structure by sandwiching the fixture 51 and the fixture 50. By forming it with a member (holder), it can be heated efficiently and can be easily fixed.

Further, in the present embodiment, the sealer 38 can move up and down relative to the holder 48. Since the holder 48 is interposed to fix the holder 48 in this way, for example, when sealing the film, the sealer 38 is also lowered to sandwich the lower and upper films 12 and 16 from above and below. It can be applied to the device. For example, as shown in FIG. 3 and the like, a predetermined space is secured between the upper surface of the support plate portion 48b of the holder 48 and the eaves portion 38b of the sealer 38 in the initial state, so that the space is used. It is preferable to move the sealer 38 downward together with the heating plate 40.

In the above-described embodiment, when replacing the sealer with a sealer having a different dimensional shape, another holder having a support plate portion corresponding to the sealer is used, but the present invention is not limited to this, and for example, the support plate portion When a holder having an adjustable length is used and the sealer is replaced, the same holder having a different length of the support plate portion may be used.

Further, in the above-described embodiment, a pull-out rack 45 is used, and the sealer 38 is mounted on the rack 45 together with the holder 48. However, the present invention is not limited to this, and the rack does not necessarily have to be used. .. For example, the upper box 32 may be removed and the sealer 38 with the holder 48 may be attached from the lower side of the bridge 34. However, if it is a drawer type as in the embodiment, it is good because it can be easily replaced.

Although various aspects of the present invention have been described above with reference to embodiments and modifications, these embodiments and descriptions have not been made for the purpose of limiting the scope of the present invention, and are intended for understanding the present invention. It should be added that it was provided to contribute. The scope of the present invention is not limited to the configurations and manufacturing methods explicitly described in the specification, but also includes combinations of various aspects of the present invention disclosed in the present specification. Of the present invention, the configuration for which a patent is sought is specified in the appended claims, but even if the configuration is not currently specified in the claims, it is disclosed in the present specification. I would like to mention that there is a possibility of claiming a patent for this configuration in the future.

12: Lower film 12a: Storage recess 13: Film transport device 16: Upper film 17: Sealing device (sealing device for deep drawing packaging machine)
31: Lower box 32: Upper box 33: Box body 34: Bridge 38: Sealer 38a: Recess 38b: Eaves 39: Film holding plate 40: Heating plate 45: Rack 46: Slide rail 48: Holder 48d: Reverse taper Surface (sloping surface)
51: Fixture 51a: Tapered surface (inclined surface)
53: Cylinder

Claims (5)

A sealing device used in a deep-drawing wrapping machine equipped with a lower box and an upper box that are arranged so as to face each other with the overlapped lower film and the upper film sandwiched between them.
The upper box comprises a bridge having a recess on the lower surface and a sealer having a sealing surface corresponding to the storage recess formed in the lower film housed in the recess.
When the sealer is housed in the recess, the sealing surface is exposed from the lower opening of the recess.
The sealer is accommodated in the recess via a holder.
The holder comprises a frame body which center is opened, and a pair of supporting portions protruding toward the center from the inner peripheral surface of the post front in the conveying direction of the lower film of the inner peripheral surface of the frame member ,
The sealer is a sealing device for a deep drawing packaging machine, characterized in that a set of both side edges is supported in the recessed portion while being supported by the pair of support portions. When replacing the lower film with another sealer having a different length in the direction along the transport direction, the pair of support portions are mounted in the recess by using holders having different intervals. The sealing device for a deep drawing packaging machine according to claim 1. The deep-drawing packaging machine according to claim 2, wherein the holder having a different distance between the pair of support portions is a holder made of a separate member or a holder in which the length of the support portion can be adjusted. Sealing device. The bridge has a rack that can be pulled out in a direction intersecting the transport direction of the lower film.
The depth according to any one of claims 1 to 3, wherein the sealer is housed in the recess in a state where the sealer is mounted on the rack via the holder. Sealing device for drawing packaging machines. A heating portion is arranged in the recess, and the sealer housed in the recess is connected with its upper surface in contact with the heating portion.
The sealing device for a deep drawing packaging machine according to any one of claims 1 to 4, wherein when the sealer is replaced, the connection is released so that the sealer is separated from the heating portion.

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