JP4562015B2 - Bag-type packaging machine - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a bag-feed type packaging machine.
[0002]
BACKGROUND OF THE INVENTION
As one of the packaging forms, there is one in which an article is placed on a tray and hermetically stored in the package. Such a package is often used when packaging a plurality of articles. And as one of the packaging machines for manufacturing the package of such a form, there is a bag supply type packaging machine.
[0003]
Such a bag-feeding type packaging machine prepares a separately manufactured packaging bag with one end opened (bag feeding), conveys the bag in a horizontal position, and pauses at a predetermined position (actually intermittent) Open the opening of the bag. On the other hand, after an article is supplied onto the tray in the middle of conveyance, the tray is inserted into the bag supply from the opening of the bag supply together with the article. And a package is manufactured by sealing an opening part.
[0004]
By the way, there is no problem if the article is something like "bowl" or "beans", but for example, "Sakiika", etc., when the individual articles are tangled and swelled as a whole When the conventional bag-feeding packaging machine described above is used as it is, the swollen article group hits the peripheral edge of the opening of the bag-feeding bag and cannot be smoothly inserted.
[0005]
Furthermore, even if it is inserted, a part of the article may fall from the tray and scatter in the bag, which may have a bad appearance and may reduce the commercial value (worst is disposal). Therefore, in the case of such an article, it was inserted manually by hand, and the productivity was poor.
[0006]
The present invention has been made in view of the above-described background, and the object of the present invention is to solve the above-described problems and reliably ensure that even an article that tends to be relatively swollen, such as “Sakiika”. An object of the present invention is to provide a bag-feeding type packaging machine that can automatically supply a bag.
[0007]
[Means for Solving the Problems]
In order to achieve the above-described object, a bag-feeding type packaging machine according to the present invention has a tray transfer means for transferring a tray, and a bag supply bag arranged in parallel with the tray transfer means and having one end open. A bag feeding and conveying means for carrying the article, a package insertion means for inserting the tray into the bag supply from the opening of the bag feeding together with the articles supplied on the tray, and the package insertion means It is assumed that the bag supply type packaging machine includes the tray and the sealing means for sealing the opening of the bag supply in which the article is stored. The tray conveying means is provided with a folding means for folding the tray in the shape of a letter V with the center portion in the front-rear direction protruding downward, and the tray conveying means is a pair that supports the front and rear of the tray. The pair of buckets can be moved forward and backward relative to each other to change the interval between them, and the interval between the trays can be reduced during the conveyance of the tray so that the tray can be bent. By doing so, the folding means was constituted, and the tray was inserted into the bag supply by the packaged article inserting means while being in a V-shaped state folded by the folding means. The “V-shape” may be a curved portion as well as a central portion that is convex downward.
[0008]
By doing so, the tray is bent in a V shape, so that the articles gather at the center of the bent tray, and because both ends of the tray are lifted compared to the center because of the V shape, the article is positioned above the article. To do. If the tray is inserted into the bag supply with the V shape, the articles remain in the center, and therefore the articles are smoothly inserted without hitting the peripheral edge of the opening of the bag supply. After the insertion, the tray returns to the original flat state due to elastic restoring force or the like.
[0009]
Furthermore, since the articles are gathered in the center of the tray at the time of insertion, the articles are not detached from the tray at the time of insertion, and the articles are kept on the tray even after being inserted into the bag supply. .
[0010]
Further, the tray transport means is configured to include a plurality of paired buckets that support the front and rear of the tray, and the pair of buckets can move forward and backward relative to each other to change the distance between the two. Since the folding means is configured by narrowing the interval in the middle so that the tray can be bent, the tray can be easily bent into a V shape simply by narrowing the interval between the pair of buckets. Of course, the configuration of the bending means may take other configurations. Note that “in the middle of conveyance” includes not only during movement but also during pause during intermittent driving.
[0011]
More preferably, an urging means (pusher) for urging the tray downward is provided at a predetermined position above the tray conveying means, and the urging means is used when the interval between the pair of buckets is narrowed or just before it. It is good to comprise so that the front-back direction center part of a tray may be pressed below. If comprised in this way, the center site | part of a tray should just bend in the state convex below. Note that there is no need for such an urging means. Even if it is not present, it can be surely made to be convex downward by devising the tray shape or attaching a fold. Furthermore, in addition to the biasing means, it can be bent downwardly by providing a guide means or the like as appropriate.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
1 to 6 show a preferred embodiment of a bag-feeding type packaging machine according to the present invention. FIG. 1 is a plan view, FIG. 2 is a front view, and FIGS. 3 to 6 are schematic views sequentially illustrating work steps. As shown in the figure, a tray conveyance device 10 that is intermittently driven in synchronization with each other and a bag feeding and conveyance device 20 are arranged in parallel.
[0013]
The tray transfer device 10 holds the tray 1 with a pair of front and rear buckets attached to an endless chain, and transfers the tray 1 to the package insertion position X. Then, the article 2 is supplied onto the tray 1 during the conveyance. In this example, the article 2 is supplied manually by the worker M. The detailed configuration of the tray transport device 10 will be described later. Further, a packaged object insertion device 30 is provided at the packaged object insertion position X that is the carry-out end of the tray transfer apparatus 10.
[0014]
Thus, when the tray 1 is transported to the packaged object insertion position X, the packaged object insertion device 30 pushes the tray 1 together with the articles 2 toward the bag feeding and transporting device 20 side. Are inserted into the bag 3. Thereafter, on the downstream side from the package insertion position X, the bag supply 3 containing the packages (tray 1 + article 2) 4 is conveyed on the bag supply / conveyance device 20.
[0015]
The bag feeding / conveying device 20 conveys the bag feeding 3 having one end opened in a horizontal state (horizontal state). Specifically, the conveyance surface 21 that receives the bag feeding 3 and one side of the conveyance surface 21. A clamp 24 as shown in FIG. 7 is attached to an endless chain 23 that is stretched around a sprocket 22 that is arranged on the front and rear sides of the outside of the tray conveying device 10 side.
[0016]
The clamp 24 is disposed in a compressed state between a lower claw 24a held in a horizontal state, an upper claw 24b attached to the lower claw 24a so as to be able to rotate forward and backward, and the lower claw 24a and the upper claw 24b. And a spring 24c. The lower claw 24a and the upper claw 24b are always urged in the closing direction by the elastic restoring force of the spring 24c.
[0017]
Accordingly, when the lower end 24b 'of the upper claw 24b is pushed up by the clamp opening / closing bar 25 disposed so as to be movable up and down below the clamp 24, the upper claw 24b rotates in a predetermined direction and the upper end 24b''rises. Therefore, the lower claw 24a and the upper claw 24b are separated from each other, and the mouth of the clamp 24 is opened (see FIG. 7B), whereas when the clamp opening / closing bar 25 is moved downward, the upper claw 24b is moved by the elastic restoring force of the spring 24c. Since the upper end 24b ″ is lowered by rotating in the opposite direction, the mouth of the clamp 24 is closed (see FIG. 7C).
[0018]
Thereby, when the mouth of the clamp 24 is in an open state, when the bag feeder 3 is placed on the lower claw 24a and then the mouth of the clamp 24 is closed, as shown in FIG. Can be held and fixed. Therefore, when the clamp 24 moves along with the rotation of the endless chain 23, the bag supply 3 is also conveyed following the movement. And if the relative positional relationship of each clamp 24 does not change, the bag supply 3 will be conveyed, hold | maintaining the attitude | position of the state clamped by each clamp 24. FIG.
[0019]
Therefore, if the spacing between the clamps 24 is set to be the width in the front-rear direction when the bag 3 is stretched in the horizontal position, the bag 3 can be transported in a tight state. In this embodiment, the pair of front and rear clamps 24 grips both ends of the bag 3 on the opening 3a side.
[0020]
Furthermore, although a specific mechanism is omitted, the clamp 24 attached to the endless chain 23 has a function of moving forward according to the rotation of the endless chain 23 and a function of approaching and moving away from each other. As a result, the opening 3a is tightly stretched when the clamps 24 approach each other while holding the bag 3 at a predetermined position of the bag feeding and conveying apparatus 20 (specifically, the position to be packaged insertion position X). It is released from the state and becomes loose.
[0021]
By the way, the clamp opening / closing bar 25 for opening and closing the clamp 24 is disposed on the side of the upstream end side (bag feeding receiving side) of the bag feeding and conveying apparatus 20 and below the downstream end side (carrying out side). .
[0022]
Accordingly, the position where the upstream clamp opening / closing bar 25 is installed is the supply position Y of the bag supply 3, and the supply bag 3 is in an upright state outside the supply position Y (on the non-installation side of the clamp 24). A storage hopper 26 for storing a large number is arranged. Then, a device for taking out the bag supply 3 stored in the storage hopper 26 one by one from the top one by one and transferring it onto the bag supply / conveying device 20 is arranged (not shown). In accordance with the transfer timing, the clamp opening / closing bar 25 is raised and the clamp 24 is opened to place the bag 3 on the lower claw 24a, and then the clamp opening / closing bar 25 is lowered to close the clamp 24. Grab the opening 3a of the bag 3. And most of the bag supply 3 is supported by the conveyance surface 21, and a horizontal state is hold | maintained. Thereby, if the clamp 24 moves, the bag supply 3 will be conveyed, hold | maintaining a horizontal state with it.
[0023]
Further, the bag feeding / conveying device 20 is arranged in the order of the protrusion detection sensor 27, the sealing device 28, and the cooling device 29 on the downstream side of the package insertion position X (see FIGS. 1 and 6). Then, the protrusion detection sensor 27 determines whether or not the article to be packaged 4 (particularly the article 2) is inserted and arranged correctly (without protruding) into the bag supply 3 and only in the case of OK, the next-stage sealing device 28 is determined. The film portion on the opening 3a side of the bag supply 3 is heat-sealed and sealed.
[0024]
The sealing device 28 has a rectangular bar-shaped heating sealer 28a, and when the bag feeding and conveying device 20 is temporarily stopped, the opening 3a of the bag feeding 3 is sandwiched from above and below, and heat is applied by applying pressure while heating. To do. Thereby, the film | membrane part pinched | interposed is heat-melted and welded. Next, the sealed portion is cooled and solidified by the cooling device 29 in the next stage. Thereby, the package 5 is manufactured.
[0025]
And since the clamp opening / closing bar 25 is also provided at the unloading end on the downstream side of the bag feeding and conveying apparatus 20, the clamp 24 coming to the unloading end is opened, and the package 5 is detached from the clamp 24 and unloaded. .
[0026]
Here, in the present invention, the tray transporting device 10 is provided with a folding device 40 for bending the tray in the middle of the transportation into a V-shape with a central portion in the front-rear direction protruding downward. Specifically, the bucket of the tray transport device 10 is also used as the folding device 40.
[0027]
That is, first, as shown in FIG. 2, the tray transporting device 10 has sprockets 11 arranged in the front and rear in the traveling direction, and the endless chain 12 is passed over the sprockets 11. At this time, the sprocket 11 and the endless chain 12 are arranged on both sides in the transport direction. And the bucket 13 is attached to the endless chain 12 arrange | positioned on both sides (refer FIGS. 8-10).
[0028]
And although the figure has shown the bucket 13 which supports the advancing direction back side, the bucket which supports the advancing direction front side arrange | positioned with the same structure and the direction of the bucket reverse is also provided. That is, one end of the pair of endless chains 12 is attached to one side of the pair of endless chains 12 so that two endless chains 12 are arranged on each side edge of the tray conveying apparatus 10 in the traveling direction. This makes it possible to adjust the interval between adjacent buckets by changing the phase (relative position) of the endless chain to which the bucket supporting the rear is attached and the endless chain to which the bucket supporting the front is attached. It is possible to deal with trays 1 having different sizes.
[0029]
Here, in the present invention, the bucket 13 is rotatably attached to the connecting plate 41 attached to the endless chain 12. Further, an L-shaped plate 42 is integrally attached to the central portion of the bucket 13, and a cam floor 43 is attached to the tip of the L-shaped plate 42. Thus, as will be described later, the cam floor 43 is guided by the cam floor guide and moved up and down, so that the L-shaped plate 42 and the bucket 13 are also rotated forward and backward.
[0030]
Furthermore, the bucket 13 includes a locking piece 44 a formed by bending the upper end of the standing wall 44, a receiving guide 45 extending downwardly from the middle of the standing wall 44, and a bottom plate 46 connected to the lower end of the standing wall 44. It has. In this example, the locking piece 44a and the bottom plate 46 are arranged in parallel, and the bottom plate 46 is the longest.
[0031]
As shown in FIGS. 11 and 12, a cam floor guide 47 is provided so as to extend horizontally along the conveying direction. The cam floor guide 47 is disposed on the upstream side first passage 47a disposed to bring the bucket 13 into a normal conveying posture, and on the downstream side of the first passage 47a, and is disposed on a higher position. 2 passages 47b and an oblique third passage 47c connecting them.
[0032]
Thereby, when the cam floor 43 is positioned in the first passage 47a, the bucket 13 is in a horizontal state as shown in FIG. 11, and the tray 1 is placed on the receiving guide 45. Is also conveyed in a horizontal state. The bottom plate 46 has a tip that is inclined upward, so that the tip can support the central portion of the tray 1.
[0033]
As the cam floor 43 passes through the third passage 47c, the bucket 13 gradually rotates and rises, and finally reaches the second passage 47b. As shown in FIG. The receiving guide 45 is inclined downward toward the tip. As a result, the front and rear end edges 1a of the tray 1 are pressed down above the upright wall 44 and by the locking pieces 44a, and the interval is narrowed. Since the tip of the receiving guide 45 is also lowered, the central portion is allowed to bend downward, so that it is bent into a substantially V shape as shown. The bottom plate 46 is horizontal.
[0034]
In practice, as shown in FIG. 4 (b), a pusher 48 that moves up and down is arranged above the tray transporting device 10, and the pusher 48 moves downward so that both side edges 1b of the tray 1 are moved. Since the central part in the front-rear direction is biased downward, it is bent into a convex V shape. The installation position of the pusher 48 is set in the third passage 47c or an area where the third passage 47c is shifted to the second passage 47b.
Therefore, when the receiving guide 45 is inclined downward, it is biased downward by the pusher 48, so that the tray 1 is surely V-shaped.
[0035]
When the cam floor moves along the second passage 47b, the state shown in FIG. 12 is maintained, so that the tray 1 is conveyed in a V-shape (see FIG. 4C), and the packaged object insertion position is reached. X is reached. In this state, the position of the front and rear end edges 1a of the tray 1 is higher than that of the central portion.
[0036]
On the other hand, as shown in FIG. 5 (a), the package insertion device 30 has a vacuum nozzle 33 that can be adsorbed to the upper and lower sides of the opening 3a of the bag supply 3, as shown in FIG. Each vacuum nozzle 33 has a function of moving in a direction away from each other and widening the opening 3a while adsorbing the opening 3a. Prior to or in synchronization with this widening process, the pair of clamps 24 approach each other to allow the widening process of the opening 3a.
[0037]
Further, as shown in FIG. 5, the tray conveyance device 10 is provided with an insertion guide 31 that suppresses the upper side of the article 2 and a pusher 32 that pushes out in contact with the side surface of the tray 1. As shown in FIG. 5A, the insertion guide 31 has a standby position where the tip is raised, and rotates from there to hold the upper surface of the article 2 as shown in FIG. When it moves forward and backward in the state of the restraining position and moves forward and forwards, as shown in FIG. Move to insert. Such movement control can be realized by a cam or the like.
In addition, FIG. 5 has shown the condition accompanying progress of time in the same position (packaged article insertion position X).
[0038]
According to the configuration described above, the tray that is being transported on the tray transport device 10 makes the tray 1 convex downward by the folding device 40 in the middle thereof. Accordingly, in the normal transport posture, the article (sakika) 2 is raised on the flat tray 1 as shown in FIG. 13A, but when the tray 1 is bent into a V shape, FIG. As shown in (b), the front and rear end 1 a of the tray 1 is higher than the upper surface of the article 2.
Therefore, if the tray 1 is inserted into the bag 3 in a V-shape, the article 2 is smoothly inserted without hitting the periphery of the opening 3a. Moreover, in the case of this embodiment, the insertion guide 31 is inserted into the bag 3 together with the insertion guide 31 while the upper surface of the article 2 is suppressed, so that the article 2 can be inserted more reliably. it can.
[0039]
【The invention's effect】
As described above, in the bag-feeding type packaging machine according to the present invention, since the tray is bent into a V shape and inserted into the bag supply in the folded state, it is an article that tends to be relatively inflated. Even if it exists, it can be surely automatically supplied into the bag supply.
[Brief description of the drawings]
FIG. 1 is a plan view showing a preferred embodiment of a bag-feeding packaging machine according to the present invention.
FIG. 2 is a front view showing a preferred embodiment of a bag-feeding type packaging machine according to the present invention.
FIG. 3 is a schematic view showing a part of a preferred embodiment of a bag-feeding type packaging machine according to the present invention (bag-feeding portion).
FIG. 4 is a schematic view showing a part (folding device part) of a preferred embodiment of a bag-feeding type packaging machine according to the present invention.
FIG. 5 is a schematic view showing a part of a preferred embodiment of a bag-feeding type packaging machine according to the present invention (packaged article insertion device portion).
FIG. 6 is a schematic diagram showing a part of a preferred embodiment of a bag-feeding type packaging machine according to the present invention (portion of a bag-feeding and transporting device after insertion of an article to be packaged).
FIG. 7 is a view showing a clamp portion.
FIG. 8 is a front view showing a bucket attached to an endless chain.
FIG. 9 is a side view showing a bucket.
FIG. 10 is a plan view showing a bucket.
FIG. 11 is a diagram showing a bending apparatus.
FIG. 12 is a diagram showing a bending apparatus.
FIG. 13 is a view showing the operation of the bending apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tray 1a Front-and-rear edge 1b Side edge 2 Article 3 Bag supply 3a Opening part 4 Package 5 Package 10 Tray conveyance apparatus 11 Sprocket 12 Endless chain 13 Bucket 20 Bag supply conveyance apparatus 21 Conveyance surface 22 Sprocket 23 Endless chain 24 Clamp 24a lower claw 24b upper claw 24c spring 25 clamp open / close bar 26 storage hopper 27 protrusion detection sensor 28 sealing device 29 cooling device 30 packaged material insertion device 31 insertion guide 32 pusher 33 vacuum nozzle 40 folding device 41 connecting plate 42 L-shaped plate 43 Cam floor 44 Standing wall 44a Locking piece 45 Receiving guide 46 Bottom plate 47 Cam floor guide 47a First passage 47b Second passage 47c Third passage 48 Pusher

Claims (2)

Tray conveying means for conveying the tray;
A bag feeding and conveying means that is arranged in parallel with the tray conveying means and conveys the bag feeding that is open at one end in a horizontally placed state;
Packaged article insertion means for inserting the tray into the bag supply from the opening of the bag supply together with the articles supplied on the tray;
A bag-feeding type packaging machine provided with sealing means for sealing the tray and the opening of the bag supply in which the article is stored by the article to be packaged,
A folding means is provided for folding the tray in the middle of conveyance by the tray conveyance means into a V shape in which a central portion in the front-rear direction is convex downward,
The tray conveying means includes a plurality of pairs of buckets that support the front and rear of the tray,
The pair of buckets move forward and backward relative to each other so that the interval between the buckets can be changed, and the interval between the trays is reduced during the conveyance of the tray so that the tray can be bent. And
The bag-feeding type packaging machine, wherein the tray is inserted into the bag supply by the article insertion means while the V-shaped state is bent by the bending means.   An urging means for urging the tray downward is provided at a predetermined position above the tray conveying means, and when the interval between the pair of buckets is narrowed or immediately before, the central portion in the front-rear direction of the tray is formed by the urging means. 2. The bag-feeding type packaging machine according to claim 1, wherein the bag-feeding type packaging machine is configured to be pressed downward.

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