JP2010036977A - End sealing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a box-motion type end sealing device for easily attaching and detaching a top cutter. <P>SOLUTION: Both top sealers are rotated and moved in the box-motion type end sealing device while retaining the opposed sealing surfaces of top sealers arranged vertically by holding a cylindrical film in between. The end sealing device includes the top cutter 40 arranged so as to make it move in the top sealer 31 in a vertical direction, and an air cylinder 41 for urging the top cutter in a direction where an edge section 40a at the tip of the top cutter is projected from the sealing surface 31a. The top cutter is detachably mounted on the top sealer, and a first position (shown in Fig.(b)) for making the air cylinder located to interrupt a removing direction of the top sealer and a second position (shown in Fig.(a)) for making the air cylinder located at a position for releasing the removing direction of the top sealer are switched. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an end seal device.

  A pillow packaging machine, which is one form of a packaging machine, has the following configuration. First, the strip-shaped film wound up by the raw fabric roll is continuously supplied to the bag making device, and when the bag making device is passed, the tubular film formed into a tubular shape is formed. In addition, an article transporting and supplying device is arranged on the upstream side of the bag making device, and an object to be packaged conveyed at predetermined intervals from the object to be packaged conveying and supplying device is supplied into the bag making device. Accordingly, when the article to be packaged passes through the bag making machine, the article to be packaged is stored at predetermined intervals in the cylindrical film, and the article to be packaged is conveyed together with the cylindrical film. A center seal device and an end seal device are arranged along the conveying direction. The center seal device seals the film polymerization end of the tubular film. The end seal device seals the tubular film in the lateral direction of travel (portion where the front and rear packages are not present) and cuts the portion of the tubular film in which the front package is stored. Is separated from the subsequent cylindrical film to produce a package.

  As one form of the above end seal device, a pair of top sealers (with built-in cutter blades) arranged one above the other with a tubular film sandwiched between them and the seal surface of the top sealer are kept facing each other. However, there is a drive mechanism that moves the top sealer along a predetermined locus. Then, the upper and lower top sealers move forward together with the tubular film by a certain amount in a state where the predetermined position of the tubular film is sandwiched from above and below. Thereby, while the site | part between which the cylindrical film was pinched is heat-sealed, it is cut. This type of end seal device is also referred to as a box motion type.

An example of this type of box motion type end seal device (having a film cutting mechanism) is disclosed in Patent Document 1, for example. In the device disclosed in Patent Document 1, a fusing device is provided as a cutting mechanism, but there is also a device provided with a cutter blade (top cutter) instead of the fusing device.
JP 2005-238374 A

  However, the conventional apparatus described above has the following problems. That is, in the box motion type end seal device, the top cutter may be removed for reasons such as cleaning, polishing, and parts replacement of the top cutter mounted on the top sealer. As the end seal device is used, the film residue welded by the heat of the top sealer may adhere to the top cutter. In addition, when an object to be packaged is caught between the upper and lower top sealers, the object to be packaged may be clogged in the cutting edge and the groove of the top cutter. Thus, in the state in which the foreign matter has adhered to the top cutter, not only can the film not be cut well, but there is a problem that the package continuously flows to the subsequent process due to poor cutting. For this reason, it is necessary to clean the top cutter at an appropriate timing.

  However, since the top cutter is fixed to the top sealer using a special bolt, the top cutter cannot be easily removed. Moreover, in the removal work, the bolt is removed from the blade edge side of the top cutter, that is, in a state where the upper and lower top sealers are opened, and the removal is performed by moving the top cutter below the upper top sealer. There was a thing.

  An object of the present invention is to provide a box motion type end seal device in which a top cutter can be easily attached and detached without using a tool.

  In order to achieve the above-described object, an end seal device according to the present invention is (1) an end seal device that seals and cuts a packaging film that encloses an object to be packaged in the lateral direction of the packaging film. A top sealer disposed above and below the packaging film, a drive mechanism for moving the top sealer in the up-down direction while maintaining a state in which the seal surfaces of the top sealer face each other, and the top sealer disposed above and below At least one of the top sealers, the top cutter arranged so as to be movable in the vertical direction in the top sealer, and the top cutter is biased in a direction in which the blade at the tip of the top cutter protrudes from the sealing surface And the top cutter is detachably mounted from the top sealer, and the top cutter A first position for positioning said actuating means so as to block the direction of removing the La was a second position to position said actuating means in a position for opening the direction detaching thereof to be switched.

  (2) The top cutter is fixed to a cutter holder, and the cutter holder can be attached to and detached from a sealer mounting base to which a top sealer is attached, and the mounting bracket of the operating means is forward and backward with respect to the sealer mounting base. It is preferable that the first position and the second position are switched by rotating the mounting bracket and rotating the mounting bracket forward and backward. In the embodiment, the forward and reverse rotation is performed as in the present invention. However, the mounting bracket for the operating means of the top cutter is not limited to the forward and reverse rotation, and does not interfere when the top cutter holder is pulled upward. If so, the moving direction or the like does not matter.

  (3) In the first position, a fixing means for holding the state may be provided. In the embodiment, the fixing means is realized by the locking portion 52d and the locking hole 55a.

  (4) Provided with return means for urging the top sealer moved by the actuating means in a direction to return the blade portion so as to be positioned in the top sealer, the cutter return pin 50 and the cutter return spring 51 It has been realized. The use of the urging means as the returning means for returning the top cutter to the standby position in this way can be realized with a simple configuration. In this case, the urging means is an elastic member (in the embodiment, a coil spring-like cutter return spring is used, but other shapes such as a spring or rubber may be used) and a cutter return pin (can be returned in a stable posture). Is not necessary). In the case where the top cutter can be returned by the force of the operating means itself, this returning means may not be provided, and even in that case, it may be provided in an auxiliary manner in order to return smoothly.

  (5) The operating means may be a cylinder. In the embodiment, an air cylinder is used, but another fluid cylinder may be used.

  In the present invention, since the top cutter can be easily removed, maintenance such as cleaning of the top cutter and replacement of parts can be performed in a short time.

  In the present invention, the top cutter can be easily attached and detached by switching between the first position and the second position.

  1 to 4 show a preferred embodiment of the present invention. A pillow wrapping machine 10 in which the end seal device of the present embodiment is incorporated includes a wrapping machine main body 11, a film supply device 12 that continuously supplies a belt-like wrapping film to the wrapping machine main body 11, and a wrapping machine main body. 11 is provided on the upstream side of the packaging material supply device 14 for supplying the packaging material 13 to the packaging machine body 11 at predetermined intervals.

  The film supply device 12 links the output of a drive motor (not shown) (speed-controllable motor such as a servo motor) to the original roll 16 obtained by winding the belt-like film 15 into a roll. Supplying to the packaging machine body 11 at a constant speed while appropriately controlling the rotation speed. Further, various rollers are arranged at predetermined positions from the original fabric roll 16 to the packaging machine body 11, and the belt-like film 15 fed out from the original fabric roll 16 is passed over the rollers, thereby passing through a predetermined path. To the packaging machine body 11. Of course, in the present invention, it is not always necessary to link the drive motor to the raw roll 16, and a feed roller may be provided on the transport path of the packaging film and pulled out.

  The package transporting and supplying device 14 includes a sprocket 17 (only the front in the traveling direction is shown in the figure) arranged at the front and rear, an endless chain 18 spanned over the plurality of sprockets 17, and a predetermined pitch on the endless chain 18. It is comprised by the several pushing finger | toe 19 attached for every. Thereby, when the pushing finger 19 hits the rear surface of the article 13 to be packaged, the article 13 also moves forward with the movement of the pushing finger 19.

  The packaging machine main body 11 includes a bag making device 20 that sets the supplied belt-like film 15 into a cylindrical film 21, a center seal device 24 disposed on the downstream side of the bag making device 20, and the center seal device 24. A belt conveyor 23 that conveys the tubular film 21, an upper restraining belt 25 that is disposed above the belt conveyor 23, an end seal device 30 that is disposed on the downstream side of the belt conveyor 23, And an unloading conveyor 26 disposed on the downstream side of the end seal device 30.

  The bag-making device 20 allows the side film edges 15a of the belt-like film 15 to contact (polymerize) with each other by passing the belt-like film 15 continuously supplied from the film feeding device 12, and the tube that has become cylindrical. The bag is placed on the film 21. In addition, the articles to be packaged 13 that are sequentially supplied from the article to be packaged supply apparatus 14 to the packaging machine main body 11 are inserted into the bag making machine 20. Thereby, the article 13 to be packaged supplied to the bag making machine 20 is arranged in the cylindrical film 21 at predetermined intervals.

  The center seal device 24 seals both side edge portions 15a of the polymerized belt-like film 15. This center seal device 24 heat-seals by heating while sandwiching both side edge portions 15a of the belt-like film 15 from both sides.

  The upper restraining belt 25 is arranged in the immediate vicinity of the upstream side of the end seal device 30 and suppresses the article 13 in the tubular film 21 from being lifted upward so that it can be conveyed while maintaining a horizontal state. ing.

  The end seal device 30 seals and cuts the tubular film 21 in a direction orthogonal to the traveling direction, that is, in a transverse direction. The film part to be sealed / cut is a predetermined position between the front and back objects 13 to be packaged. Thereby, the head part of the cylindrical film 21 is isolate | separated from the subsequent by passing the end seal apparatus 30, and the package body 27 is manufactured.

  Hereinafter, the end seal device 30 will be described. The end seal device 30 of the present embodiment is of a so-called box motion type, and a pair of top sealers 31 and 32 arranged vertically with the tubular film 21 sandwiched therebetween make the seal surfaces 31a and 32a face each other. It moves along a predetermined trajectory while maintaining the state. That is, both the top sealers 31 and 32 move closer to each other from the reference position and sandwich the tubular film 21 from above and below, thereby pressurizing and heating the film portion in contact with the seal surfaces 31a and 32a with a predetermined pressure. . The top sealers 31 and 32 move forward along the moving direction of the tubular film 24 while maintaining the state in which the tubular films 21 are sandwiched by approaching each other as described above. The moving speed at this time is equal to the moving speed of the tubular film 21. When the pair of top sealers 31 and 32 move by a predetermined distance, both the top sealers 31 and 32 move away from each other and move in the direction opposite to the moving direction of the tubular film 21 to reach the reference position.

  These upper and lower top sealers 31 and 32 are attached to an upper sealer mount 33 and a lower sealer mount 34, respectively. That is, the lower top sealer 32 is fixed to the upper surface of the lower sealer mount 34 and moves together with the lower sealer mount 34. The upper top sealer 31 is attached to the lower surface of the upper sealer mounting base 33 via a moving base 35 so as to be movable up and down. The upper top sealer 31 is fixed to the lower surface of the belt-like moving table 35. Then, a plurality of guide rods 36 are formed upright on the upper surface of the moving table 35, and these guide rods 36 are inserted into a through hole 33 a that vertically penetrates the upper sealer mounting table 33. As the guide rod 36 reciprocates in the through hole 33a along the axial direction, the guide rod 36, and thus the movable table 35 and the upper top sealer 31, also move up and down. Furthermore, the tip (upper end) of the guide rod 36 is attached to the upper sealer mount 33 so as not to move downward by a certain distance or more by an appropriate mechanism / structure. As a result, the movable table 35 and the upper top sealer 31 are prevented from being separated from the upper sealer mounting table 33 and falling. Furthermore, a coil spring 37 is attached to the predetermined guide rod 36, and the moving table 35 and thus the upper top sealer 31 are urged downward by the elastic restoring force of the coil spring 37. Accordingly, when the upper top sealer 31 is urged upward by an external force, the coil spring 37 moves upward while being compressed and deformed. Thereby, when the upward urging force is eliminated, the upper top sealer 31 smoothly moves downward by the elastic restoring force of the coil spring 37 in addition to the weight of the upper top sealer 31 and the like.

  Cam floors 38 are arranged on both side surfaces of the upper sealer mount 33 and the lower sealer mount 34 so as to protrude outward. This cam floor 38 matches a groove cam provided on a cam plate attached to the inner surface of the machine frame having a substantially rectangular shape that surrounds the periphery of the cylindrical film 21 (not shown). The above-mentioned revolving movement follows the shape of the cam. In addition, since the structure which revolves the upper and lower top sealers 31 and 32 using such a cam mechanism is a conventionally well-known thing, the detailed description is abbreviate | omitted. Also, instead of using a cam in this way, a plurality of drive motors such as a drive motor for moving the top sealers 31 and 32 up and down and a drive motor for moving forward and backward are provided, and each of these drive motors is provided. The top sealers 31 and 32 can be revolved by operating at an appropriate timing.

  In addition, by appropriately setting the shape of the groove cam of the cam plate, the upper and lower top sealers 31 and 32 can be used together with the tubular film 21 while maintaining the state where the seal surfaces 31a and 32a are in contact with each other for a certain period. Although it moves forward, the lower top sealer 32 urges the upper top sealer 31 upward and compresses and deforms the coil spring 37 when the seal surfaces 31a and 32a come into contact with each other. Accordingly, the upper and lower top sealers 31 and 32 can receive the force such as the elastic restoring force of the coil spring 37 to sandwich the tubular film 21 with a predetermined pressure and heat seal.

  A through hole is provided in each of the center portions of the seal surfaces 31 a and 32 a of the upper top sealer 31. And in the through-hole 31b provided in the upper side top sealer 31, the top cutter (cutter blade) 40 is arrange | positioned so that an up-down movement is possible. The top cutter 40 has a serrated blade portion 40a at the lower end. The top cutter 40 is moved up and down relatively with respect to the lower top sealer 32 by receiving a force from an air cylinder 41 as a driving source attached to the upper surface of the upper sealer mounting base 33. And when the top cutter 40 comes to the lowest position, the blade part 40a will protrude below the sealing surface 31a.

  On the other hand, the through hole provided in the lower top sealer 32 is provided at a position facing the through hole 31b of the upper top sealer 31, and the blade portion 40a of the top cutter 40 protruding downward from the seal surface 31a is formed in the cylindrical film 21. And is inserted into the through hole. Further, the shape of the blade portion 40a may be a sharp blade on a straight line instead of a sawtooth shape. In that case, a flat receiving blade may be disposed inside the through hole of the lower top sealer 32. Thereby, the cylindrical film 21 pinched | interposed between the blade part 40a which protruded below, and a receiving blade is cut | disconnected by the horizontal direction along the blade part 40a.

  Furthermore, the drive mechanism of the top cutter 40 etc. are demonstrated. As shown in FIG. 4 (b), through holes 35 a and 33 b are respectively provided in the moving table 35 and the upper sealer mounting table 33 so as to face the through holes 31 b formed in the upper sealer mounting table 33. These through holes 31b, 35a, 33b are positioned on the same plane, and the top cutter 40 is inserted into the through holes 31b, 35a, 33b so as to be movable up and down.

  The top cutter 40 is connected to the cutter holder 42 at its upper end. The cutter holder 42 has a guide pin 43 extending downward in parallel with the top cutter 40, and the guide pin 43 is inserted into a guide hole 33 c provided in the upper sealer mounting base 33. Thereby, the top cutter 40 can be moved up and down stably as the guide pin 43 moves up and down in the guide hole 33c.

  On the other hand, a cutter return pin 50 is attached to the upper surface of the upper sealer mounting base 33 at a position facing both sides of the lower surface of the cutter holder 42. The cutter return pin 50 has a cutter return spring 51 mounted concentrically on the outer periphery thereof, and the cutter return pin 50 is urged upward by the cutter return spring 51. As a result, the cutter return pin 50 contacts both sides of the lower surface of the cutter holder 42 and biases it upward.

  Therefore, as described above, when the cylinder rod of the air cylinder 41 urges the cutter holder 42 downward, the top cutter 40 also moves downward together with the cutter holder 42 to cut a predetermined position of the tubular film 21. When the cylinder rod of the air cylinder 41 is stored in the main body, the top cutter 40 moves up together with the cutter holder 42 by the action of the cutter return spring 51.

  The air cylinder 41 is linked to the upper sealer mounting base 33 via an L-shaped mounting bracket 52. That is, the air cylinder 41 is connected to the top plate 52 a of the L-shaped mounting bracket 52, and the lower end of the front wall 52 b of the L-shaped mounting bracket 52 is attached to the front surface of the upper sealer mounting base 33. It is connected to the connecting plate 53 via a rotating shaft 54 so as to be able to rotate forward and backward. 4B, the top plate 52a of the mounting bracket 52 is disposed so as to cover the upper surface of the cutter holder 42 (the cylinder rod of the air cylinder 41 contacts the upper surface of the cutter holder 42). 4), the top plate 52a of the mounting bracket 52 is moved to the near side as shown in FIG. 4 (b) by rotating the mounting bracket 52 toward the front side (clockwise in the figure). It can be moved and switched alternately between the state in which the upper space of the cutter holder 42 is opened. By opening the upper space in this way, the top cutter 40 together with the cutter holder 42 can be removed from the upper sealer mounting base 33, and cleaning, replacement, etc. of the top cutter 40 can be easily performed. 4A, in order to attach the top cutter, the upper sealer is inserted so that the cutter blade 40 and the guide pin 43 are inserted into the through holes 33b and 33c in the upper sealer mounting base 33 that is opened upward. After mounting the mounting base 33, the L-shaped mounting bracket 52 is rotated counterclockwise from the state of FIG. 4A, and the top plate 52a is set so as to cover the upper surface of the cutter holder 42, and FIG. b).

  Furthermore, in this embodiment, a mechanism for fixing in the state of FIG. 4B is provided. That is, the clamp lever 52 c is attached to the front wall 52 b of the L-shaped attachment fitting 52. The crank lever 52c can reciprocate in a horizontal direction (a direction orthogonal to the front wall 52b), and a locking portion 52d at the tip thereof is a locking hole of a locking plate 55 provided on the rear surface of the connecting plate 53. It can be inserted into 55a. That is, as shown in FIG. 4B, in the normal state in which the clamp lever 52c is pushed in, the locking portion 52d enters the locking hole 55a and prevents the L-shaped mounting bracket 52 from rotating. . From this state, the clamp lever 52c is moved forward, and the locking portion 52d is disengaged from the locking hole 55a (positioned in the through hole 52b ′ of the front wall 52b), whereby the mounting bracket 52 is rotated. It was possible.

  In the embodiment described above, the case where all are applied to a pillow packaging machine is shown, but the present invention is not limited to this, and can be applied to a four-side seal packaging machine, a deep-drawing packaging machine, and other various packaging machines.

It is a figure which shows an example of the packaging machine with which the end seal apparatus which concerns on this invention is mounted. It is a front view showing one suitable embodiment of an end seal device concerning the present invention. It is sectional drawing which fractured | ruptured the upper sealer mounting base of the end seal apparatus of this embodiment partially. It is the sectional view on the AA line in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Pillow packaging machine 11 Packaging machine main body 12 Film supply apparatus 13 Packaged article 14 Packaged article conveyance supply apparatus 21 Cylindrical film 24 Center seal apparatus 30 End seal apparatus 31 Upper top sealer 32 Lower top sealer 40 Top cutter 41 Air cylinder 42 Cutter holder 40a Blade part
50 Cutter return pin 51 Cutter return spring 52 Mounting bracket 52d Locking portion (fixing means)
55a Locking hole (fixing means)

Claims (5)

An end seal device that seals and cuts a packaging film that encloses an article to be packaged in the lateral direction of the packaging film,
A top sealer disposed above and below the packaging film;
A drive mechanism that moves the top sealer up and down while maintaining the state where the seal surfaces of the top sealer are opposed to each other;
At least one of the top sealers disposed above and below, a top cutter disposed so as to be movable in the vertical direction within the top sealer;
An operating means for urging the top cutter in a direction in which the blade portion at the tip of the top cutter protrudes from the sealing surface;
With
The top cutter is detachably mounted from the top sealer,
It is possible to switch between a first position where the actuating means is positioned so as to block a direction in which the top sealer is removed and a second position where the actuating means is located in a position where the removing direction is opened. End seal device. The top cutter is fixed to a cutter holder, and the cutter holder can be attached to and detached from a sealer mounting base to which a top sealer is attached,
The mounting bracket of the actuating means is mounted on the sealer mount so as to be able to rotate forward and backward, and the mounting bracket is rotated forward and backward to switch between the first position and the second position. The end seal device according to claim 1, wherein   The end seal device according to claim 1 or 2, wherein a fixing means for holding the state is provided at the first position.   4. The apparatus according to claim 1, further comprising return means for urging the top sealer moved by the actuating means in a direction to return the blade portion so as to be positioned in the top sealer. The end seal device according to item.   The end seal device according to any one of claims 1 to 3, wherein the operating means is a cylinder.

Images