JP5319222B2 - Bag packing machine - Google Patents

Description

The present invention relates to a bag filling and packaging machine, and more specifically, a heat sealing device that seals a bag mouth of a bag filled with an article to be packaged using a pair of hot plates, and a pair of the sealed bag mouths. The present invention relates to a bag filling and packaging machine provided with a cooling device that cools using a cooling plate.

  In a bag filling and packaging machine that seals a bag mouth using a pair of hot plates, a primary seal device, a secondary seal device, and a seal portion cooling device are mounted, and the bag mouth of the bag filled with an article to be packaged by these devices Generally, a sealing process and a cooling process are sequentially performed. Each of the primary sealing device and the secondary sealing device includes a pair of hot plates, and heat seals are performed by pressing the seal portion of the bag between the hot pressing surfaces of the hot plates facing each other. The sealing portion is clamped by the opposing clamping surface to cool the sealing portion.

By the way, when heat sealing is performed by a hot plate, foaming occurs when wrinkles occur on the bag mouth surface, or when a liquid material as a package is attached to the bag mouth, so-called biting occurs, and packaging The appearance of the product is impaired. In order to cope with this, a sheet with fine irregularities formed on the clamping surface of the cooling plate, such as a glass cloth impregnated with a fluororesin, is hung, and the sealing portion of the bag mouth is utilized using the irregularities on the surface of the sheet. For example, a mesh pattern is formed to make wrinkles and foam inconspicuous. However, as this sheet is used, it becomes worn and the irregularities disappear. Accordingly, it is necessary to periodically inspect the sealing portion of the bag mouth after cooling and replace the sheet if necessary. In addition, the pattern formed on the seal part of the bag mouth is intended to make wrinkles and foam inconspicuous, so the pattern is mesh, streaks, satin, dimples, etc. The product value has not been improved.

  In Japanese Patent Publication No. 1-32105, Japanese Patent Publication No. 6-49492, and Japanese Patent Application Laid-Open No. 2004-136940, a concave and convex portion is formed on the pinching surface of the hot plate, and the bag mouth is directly pinched by this pinching surface, so that the bag mouth is predetermined. Embossing of patterns such as mesh, streaks, satin and dimples. However, since the hot plate is warped by heat and the pressing surface is not flat, in the heat sealing device using the hot plate described in the above publication in which irregularities are formed on the pressing surface, wrinkles and foaming are noticeably generated at the bag mouth. Thus, the sheet placed on the cooling plate cannot be processed, and the aesthetics of the packaged product are adversely affected. In addition, due to the presence of the irregularities, the heat transfer to the bag mouth becomes non-uniform, which may cause a seal failure.

  Japanese Patent Application Laid-Open No. 2004-268933 discloses that a concave portion is formed on the pressing surface of the cooling plate on one side, and a mark is formed only on one side of the seal portion by this concave portion. However, this mark is used to specify the used seal head, and it is impossible to make the wrinkles and foaming generated in the bag mouth seal portion inconspicuous by heat sealing.

In Japanese Patent Laid-Open No. 2000-264346, there is a pattern on the seal part of the bag, which is printed.
In Japanese Patent Application Laid-Open No. 2004-142132, the bag surface is embossed, and this embossing is formed by heating the upper member that receives and heats the sheet material before manufacturing the bag with the lower member, The lower member is inserted into the bag through the bag mouth and the upper member is applied to the outside. Therefore, it cannot cope with wrinkles and foaming generated when the bag mouth is heat-sealed.
Japanese Patent Publication No. 1-32105 Japanese Examined Patent Publication No. 6-49492 JP 2004-136940 A JP 2004-268933 A JP 2000-264346 A JP 2004-142132 A

The present invention has been made in view of the above-mentioned problems of the conventional example, and it is possible to make the wrinkles and foam generated in the bag mouth seal portion inconspicuous by heat sealing, and the conventional periodic inspection of the bag mouth seal portion. It is an object of the present invention to provide a bag-packing and packaging machine that does not require sheet replacement or the like and that does not cause poor sealing and that can enhance the aesthetics of the bag and increase the value of the product.

In order to solve the above-mentioned problems, a bag filling and packaging machine according to the present invention includes a filling device that fills a bag with an article to be packaged, a heat sealing device that heat-seals the bag mouth of the bag, and the heat-sealed bag. A cooling device that cools the mouth, and the heat sealing device includes a pair of heat plates that heat-seal the sealing portion of the bag, the pair of heat plates facing each other and holding the seal portion flat Each of the cooling devices includes a pair of cooling plates that cool the heat-sealed seal portion, and the pair of cooling plates include a pressing surface that faces each other and clamps the sealing portion, respectively. One of the cooling plates is made of metal, and a plurality of letters or symbols repeated in a certain pattern are formed in a convex or concave shape on the clamping surface of the one cooling plate. The clamping surface of the cooling plate is directly on the sealing part of the bag It is pressed.
The one cooling plate is composed of a clamping member having the clamping surface and a support member that supports the clamping member, and the clamping member is detachably attached to the support member. be able to.
Furthermore, the other cooling plate of the pair of cooling plates may be made of metal, and the pressing surface of the other cooling plate may be formed flat.
Further, the other cooling plate of the pair of cooling plates is made of metal, and is configured such that a mesh-like unevenness is formed on the clamping surface of the other cooling plate and is directly pressed against the bag. Can do.
Furthermore, the present invention provides a bagging and packaging machine having the following configuration. That is, the bagging and packaging machine includes a filling device that fills a bag with an article to be packaged, a heat sealing device that heat-seals the bag mouth of the bag, and a cooling device that cools the heat-sealed bag mouth, The heat sealing device includes a pair of heat plates that pinch the seal portion of the bag, the pair of heat plates face each other, and each has a flat pressure surface that presses the seal portion, and the cooling device includes a pair of cooling plates. The pair of cooling plates are made of metal, are opposed to each other, and each have a clamping surface that clamps the seal portion, and each of the clamping surfaces has a mesh-like convex portion, It is directly pressed against the seal part of the bag.
In the above, the convex part can be formed in a truncated quadrangular pyramid shape.
Further, each of the cooling plates is constituted by a clamping member having the clamping surface and a support member that supports the clamping member, and the clamping member is detachably attached to the support member. can do.

According to the present invention, a character formed on the pinching surface of the pinching member, a character corresponding to the code, or a convex portion formed in a mesh shape is transferred to the heat sealed bag mouth portion to form a concave shape or a convex shape. It is formed. Thereby, wrinkles and foaming generated in the bag mouth by heat sealing in the previous step can be made inconspicuous. In addition, since the embossing process is performed in the cooling process, not in the heat sealing process, heat sealing can be performed using a hot plate having a flat clamping surface, so that good heat sealing can be performed. In addition, since a conventional sheet is not used, it is not necessary to periodically inspect the bag mouth seal portion and replace the sheet, thereby increasing work efficiency. Further, by repeatedly forming characters, symbols, and the like formed on the clamping surface in a certain pattern, it is possible to enhance the aesthetics of the packaged product as compared with the conventional case. Moreover, it is possible to express the trademark of the product as characters, symbols, etc., which is convenient.

  Embodiments of the present invention will be described below with reference to the drawings. However, the following embodiments are exemplarily shown, and the scope of the present invention is not limited thereto.

  FIG. 1 is an overall configuration perspective view showing an overall configuration of a bag filling and packaging machine (hereinafter referred to as “packaging machine”) 1 according to an embodiment of the present invention. In this embodiment, the packaging machine 1 is a rotary type provided with a rotary table 3. The rotary table 3 is provided with grippers 5 that hold the both side edges of the bag B in pairs and are provided at predetermined intervals in the circumferential direction, and from the station, that is, the stop position S <b> 1 with the intermittent rotation of the rotary table 3. Move sequentially to S10. In these stations S1 to S10, various processing steps are executed while the rotary table 3 is stopped. In the present embodiment, the rotary table 3 is intermittently rotated, but may be a continuous rotary type.

  The first station S1 is a bag supply process. In this embodiment, the bags B fed one by one by the bag magazine 7 which is a conveyor magazine are taken out by a pair of bag take-out suckers 9 and transferred toward the gripper 5. However, the posture is changed to a vertical state, and the gripper 5 receives and holds the posture. Since the configuration of the conveyor magazine 7 and the configuration of transferring the bag B to the gripper 5 using the bag take-out suction cup 9 are well known, detailed description thereof will be omitted. The next station S2 is a printing process, in which the printer 11 prints the manufacturing date and the like on the bag B. Station S3 is a bag opening process, and the bag B is opened with a pair of opening suction cups 13 and an opening guide 15. The opening guide 15 is a follow-up type, moves to the station 4 following the bag B, and returns to the station 3 at a predetermined timing. Station S4 is a step of filling a bag B with a solid article to be packaged using the hopper 17, and station S5 is a step of filling a liquid article to be packaged stored in a tank (not shown) through a nozzle 19.

Next, the station S6 is a process in which steam is jetted from the steam nozzle 21 into the bag and the air in the bag B is replaced with steam to deaerate. A primary sealing device 22 including a pair of hot plates 23 is disposed at the station S7. Each of the hot plates 23 is provided with a rod-like heater (not shown), and heats the hot plate 23 to a predetermined temperature. Then, heat sealing is performed over a predetermined range from the bag mouth edge of the bag B with the flat pressing surfaces of the hot plate 23 facing each other. In the station S8, a secondary sealing device 24 having a pair of hot plates 25 each having a flat pressing surface is also arranged to perform secondary sealing. In the station S9, a cooling device 27 having a pair of cooling plates 28 and 38 is arranged to cool the heat-sealed seal portion of the bag B, and then discharge the bag B as a product to the product discharge sheet 26. . At station S10, the bag B determined to be defective is discharged.

Next, the cooling device 27 disposed in the station S9 will be described in detail with reference to FIG. FIG. 2 is a side view showing a main part of the cooling device 27.

In the figure, reference numeral 30 denotes an upper slide shaft, which is connected to a drive source (not shown) so as to advance and retreat in the axial direction (left-right direction in FIG. 2). A cooling plate mounting block 31 is fixedly attached to the tip of the upper slide shaft 30. A cooling plate 28 is fixedly attached to the lower end of the cooling plate mounting block 31.

The cooling plate 28 includes a cooling plate main body 32 as a support member and a pressing member 33 supported by the cooling plate main body 32. The cooling plate main body 32 is an elongated metal member having a rectangular shape in the longitudinal section, and extends in a direction perpendicular to the paper surface in the figure. The pinching member 33 is an approximately L-shaped metal elongated member whose vertical section is turned upside down, and is detachably attached to the cooling plate main body 32 as shown in the figure by appropriate attaching means such as a bolt (not shown). Yes. The left end surface of the pinching member 33 is a pinching surface 34 that is pressed against the bag B, and is opposed to the bag mouth that has been heat-sealed in the previous step above the portion gripped by the gripper 5 of the bag B. The upper slide shaft 30 is pressed against the bag mouth by moving to the left in the figure. The cooling plate main body 32 and the pinching member 33 have a length sufficient to cover the entire width of the bag B, and a flow path (in which cooling water can circulate inside the cooling plate main body 32 when necessary) ( (Not shown) is formed, and the pinching member 33 is cooled so that the cooling effect of the bag B by the cooling device 27 can be sufficiently obtained.

The other cooling plate 38 and the configuration for attaching it to the cooling device 27 are substantially the same as the one cooling plate 28 and the configuration for attaching it to the cooling device 27. That is, reference numeral 40 denotes a lower slide shaft connected to a driving device (not shown), 41 denotes a cooling plate mounting block fixedly attached to the tip thereof, and the cooling plate 38 is fixed to the tip of the cooling plate attachment block 41. The cooling plate main body 42 attached in this manner and the clamping member 43 detachably attached thereto are constituted. The pinching member 43 is arranged so that the pinching surface 44 faces the pinching surface 34 of one of the pinching members 33 with the bag B interposed therebetween. Since the operation of cooling the bag B by the cooling plates 28 and 38 is the same as that of a known cooling device, detailed description thereof is omitted.

3A and 3B are views showing the pressing member 33 constituting the one cooling plate 28 described above. FIG. 3A is a plan view, FIG. 3B is a front view, and FIG. 3C is a right side view. 4 is an enlarged view of portion A in FIG. 3B, and FIG. 5 is an enlarged view of portion B in FIG. As shown in these drawings, a plurality of letters or symbols repeated in a certain pattern are formed in a convex shape or a concave shape on the pinching surface 34 of the pinching member 33. In this embodiment, the alphabet T, The letters Y and J are repeatedly formed in a convex shape with the left and right reversed. In FIG. 3, reference numeral 35 denotes a hole through which a bolt for attaching the pinching member 33 to the hot plate main body 32 is inserted. In this embodiment, the pressing surface 44 of the pressing member 43 constituting the other cooling plate 38 is not formed with any irregularities and is a flat surface. In the present embodiment, the pair of cooling plates 28 and 38 are used to cool the heat-sealed bag mouth of the bag B, and at that time, a conventionally used sheet or the like is not used, and the clamping surface 34, 44 is pressed directly against the bag B.

FIG. 6 is a front view showing the bag B thus cooled, and FIG. 7 is an enlarged view of a portion C in FIG. In the bagging and packaging machine according to the present embodiment having the cooling device 27 using the hot plates 28 and 38, as shown in FIGS. The characters formed on the pressing surface 34 of 33 and the characters corresponding to the symbols are transferred to form a concave shape. As a result, wrinkles and foaming generated in the bag mouth due to heat sealing in the previous process become inconspicuous. In addition, this embossing process is performed in the cooling process, and in the heat sealing process, heat sealing is performed using a hot plate having a flat pressing surface. Therefore, good heat sealing can be performed. In addition, since a conventional sheet is not used, it is not necessary to inspect the bag mouth seal part and replace the sheet. Further, by repeatedly forming characters, symbols, and the like formed on the clamping surface in a certain pattern, it is possible to enhance the aesthetics of the packaged product as compared with the conventional case. Moreover, it is also possible to represent the trademark of the product as a character, a code, or the like.

In the above embodiment, the letters, symbols, etc. formed on the pinching surface 34 of one of the pinching members 33 are formed in a convex shape, but this may be a concave shape. In addition, the pressing surface 44 of the other pressing member 43 is not flat, and for example, irregularities may be formed in a mesh shape.

Another example of the pinching member will be described with reference to FIGS. 8 to 10 correspond to FIGS. 3, 4 and 5 in the first embodiment, respectively.

The pinching member 53 is different from one of the pinching plates used in the above-described embodiment in that the pinching surface 54 is not a character, but a convex portion formed in a mesh shape. The other configurations are the same. In this example, in the two cooling plates constituting the pair of cooling plates, convex portions having the same shape are formed in a mesh shape on the pinching surfaces of the respective pinching members. Further, the cooling plate main body combined with the pinching member 53, the cooling plate mounting block to which it is mounted, the upper and lower slide shafts, etc. may be the same as those in the previous embodiment. Further, the pressing surface 54 is directly pressed against the bag as in the previous embodiment.

  The convex portions 55 formed in a mesh shape on the pinching surface 54 of the pinching member 53 in this example are formed in a truncated quadrangular pyramid shape as shown in FIGS. By using this pinching member 53, a truncated quadrangular pyramid shaped depression is formed in a mesh shape at the bag mouth of the bag B.

It is a whole composition perspective view of a bag packing machine concerning an embodiment of this application. It is a side view of the principal part of a cooling device. It is a figure which shows a pinching member, (A) is a top view, (B) is a front view, (C) is a right view. It is the A section enlarged view in Drawing 3 (b). It is the B section enlarged view in Drawing 3 (C). It is a front view of the bag manufactured with the bagging packaging machine of embodiment of this application. It is the C section enlarged view in FIG. It is a figure which shows the other example of one clamping member, (A) is a top view, (B) is a front view, (C) is a right view. It is the D section enlarged view in FIG. It is the E section enlarged view in FIG.

Explanation of symbols

    1: Bag filling and packaging machine 3: Rotary table 5: Gripper 22: Primary sealing device 24: Secondary sealing device 27: Cooling device 28: Cooling plate 32: Cooling plate body 33: Clamping member 34: Clamping surface 38: Cooling plate 42: Cooling plate body 43: Clamping member 44: Clamping surface

Claims (7)

In a bagging and packaging machine comprising: a filling device that fills a bag with an object to be packaged; a heat sealing device that heat-seals the bag mouth of the bag; and a cooling device that cools the heat-sealed bag mouth. The sealing device includes a pair of heat plates that heat-seal the sealing portion of the bag, the pair of heat plates each include a flat pressing surface that faces each other and clamps the sealing portion, and the cooling device includes the heat seal A pair of cooling plates for cooling the sealed portion, the pair of cooling plates each having a pressing surface that faces each other and clamps the sealing portion, and one cooling plate of the pair of cooling plates is A plurality of letters or symbols repeated in a fixed pattern are formed in a convex shape or a concave shape on the clamping surface of the one cooling plate, and the clamping surface of the one cooling plate is a sealing portion of the bag Bagging, characterized by being pressed directly onto Packaging machine. 2. The bagging and packaging machine according to claim 1 , wherein the one cooling plate includes a pinching member provided with the pinching surface and a support member that supports the pinching member, and the pinching member is the support member. A bag filling and packaging machine that is detachably attached to a member . 3. The bagging and packaging machine according to claim 1, wherein the other cooling plate of the pair of cooling plates is made of metal, and the pressing surface of the other cooling plate is formed flat. And bagging and packaging machine. In the bagging and packaging machine according to claim 1 or 2, the other cooling plate of the pair of cooling plates is made of metal, and a mesh-like unevenness is formed on the pressing surface of the other cooling plate, A bag filling and packaging machine, wherein the bag is directly pressed against a seal portion of the bag. In a bagging and packaging machine comprising: a filling device that fills a bag with an object to be packaged; a heat sealing device that heat-seals the bag mouth of the bag; and a cooling device that cools the heat-sealed bag mouth. The sealing device includes a pair of hot plates that pinch the seal portion of the bag, the pair of hot plates face each other and includes a flat pressing surface that presses the seal portion, and the cooling device includes a pair of cooling plates. The pair of cooling plates are made of metal, and each have a clamping surface facing each other and clamping the seal portion, and each of the clamping surfaces is formed with a mesh-like convex portion, and the clamping surface is the bag A bag-packing and packaging machine, wherein the bag is directly pressed against the seal part. 6. The bag filling and packaging machine according to claim 5, wherein the convex portion is formed in a truncated quadrangular pyramid shape. 7. The bagging and packaging machine according to claim 5, wherein each of the cooling plates includes a pressing member having the pressing surface and a support member that supports the pressing member, A bag filling and packaging machine that is detachably attached to a support member.

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