JP4176229B2 - Automatic bag feeder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automatic bag feeder. More specifically, for example, a plurality of bag body groups in which one end portion of a bag body is closed to form a bottom portion and the other end portion is an open end portion, such as a square bottom bag. The present invention relates to an improvement of an automatic bag feeder that takes out these bags one by one from a magazine stored in a standing state at a predetermined interval and moves to the next processing step.
[0002]
[Prior art]
Conventionally, in the case of a bag body, in particular, a square bottom bag, the difference between the bottom end portion and the open end portion of the bag layer is 8 layers at the largest portion, that is, the side end portion of the bag including the body pasting portion and the pleat portion. (13 layers vs. 5 layers) Therefore, when a plurality of bags are stacked on a flat surface, a fan-shaped side end surface is shown as shown in FIG. It is known to become.
[0003]
In order to solve this problem, various devices have been tried in automatic bag feeders, particularly hexagon bottom bags and square bottom bag feeders, which take out one bag at a predetermined interval from a plurality of completed bag groups. Has been. As a typical example, as shown in FIG. 7, a bag 1 is accommodated in an inclined magazine 2 with its bottom end 1a facing down and the opening end 1b facing up, and obliquely above the magazine. The block 2c that holds the bag body group is placed on the bag body, and the bag body located in the diagonally lower end of the magazine is sucked by the suction cup 91 (not shown) Is placed in an easy-to-take position from the magazine.
[0004]
However, in this type of bag feeder, the bags housed in the magazine are unavoidably tilted forward due to the difference in the thickness between the accumulated bottom end and the open end, so many The bag is supplied from the diagonally upper end of the magazine, so the more bags that are stored, the harder it is for the employees to reach and the work becomes more difficult become. Thus, in this type of apparatus, there is a limit to the number of bags that can be accommodated in the magazine. Therefore, it is necessary to frequently supply additional bags, and a labor-saving effect has not been expected.
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of such circumstances, and the problem is that the supply of the bag body to the magazine by hand is facilitated, and the thickness of the bottom end portion and the opening end portion is reduced in order to reduce the work frequency. An object of the present invention is to provide an improved automatic bag feeder that can accommodate a large number of bags having a large difference.
[0006]
[Means for Solving the Problems]
In the automatic bag feeder of the present invention, the magazine for storing the bag body is horizontally extended, and the bag body group is stood and stored in a state in which the bag group is laid sideways, and only the bottom end portion is rearward in the traveling direction of the bag body group. 6 and 7 to prevent the bag group from becoming a fan shape as shown in FIG. 6 or FIG. 7, and to hold the top end of the bag body group. By providing means for advancing the front wall of the opening end portion to the position of the front wall of the bottom end portion of the bag body, the bag body can be surely taken out from the magazine one bag at a time by means such as a sucker. Solved the problem.
[0007]
That is, in order to solve the above-mentioned problem, the automatic bag feeder of the present invention has a plurality of bag groups, or one end , with one end closed and the bottom formed into a hexagonal bottom, and the other end opened as an end. A magazine for accommodating a plurality of bag groups having a fold portion with the bottom portion formed as a square bottom and the other end portion being an open end portion, and the bag bodies are predetermined from the magazine. And at least the bottom end of the bag body along one side edge of the magazine and the open end thereof on the opposite side. A horizontally extending magazine that is accommodated along the edge, and is attached to the magazine, and (a) corresponds to the thickness of the bottom end formed on the hexagonal or square bottom of the bag taken out of the magazine A bag group feeding means for advancing the bag group by a distance to be moved; (b) one magazine The aligned along the side edges and the free open end of the bag is, pressing only the bottom end which is aligned along the other side edge of the traveling direction rear, the forward movement of the bag body group And (c) a front wall of the opening end portion of the bag body located at the top of the bag body group in the magazine, and a front wall of the bottom end portion of the bag body. Means for advancing to a position at a speed slightly faster than the feed speed of the feed means of the bag group .
[0008]
In the apparatus of the present invention, the feeding means of the bag group is transferred via a continuously variable transmission by a driving source of a transferring means for transferring the bag body fed from the automatic bag feeder in the next step at a predetermined interval. The endless belt driven at a speed that advances the bag body by a distance corresponding to the thickness of the bottom end of one bag while the bag body transferring means in the next step advances the bag body by one pitch.
In the device of the present invention, the bottom end pressing means of the bag body is guided by a wire that is guided through a plurality of pulleys and is weighted by the weight of a weight attached to the end, At least one presser plate that presses the bottom end portion of the bag group housed in the magazine from the rear can be used.
Furthermore, in the apparatus of the present invention, means for advancing the opening end of the top bag body of the bag group in the magazine is attached below the opening end of the bag body, It can be a gear or brush roller that rotates continuously at a peripheral speed slightly faster than the feed speed.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings, but the present invention is not limited thereto.
[0010]
1 is a schematic side view of an automatic bag feeder according to an embodiment of the present invention, FIG. 2 is a schematic plan view of the apparatus of FIG. 1, and FIG. 3 is a schematic end face of the apparatus of FIG. 4 is an enlarged view of the main part of FIG. 3, and FIG. 5 is an enlarged view of the main part of FIG.
[0011]
Reference numeral 1 in the figure is a bag or a group of bags, 1a is a bottom end or bottom end, 1b is an open end or open end, 2 is a magazine, 2a is a guide bar, 2b is a guide plate, 2c is Block, 2d is a press plate, 2e is a ball bearing, 3 is a feed belt as means for advancing the bag group, 31, 32, 33 and 34 are pulleys, 4a and 4b are press plates, 41a and 41b are rodless air Cylinders 42a and 42b are rodless air cylinders, 43a and 43b are rodless air cylinders 41a and 41b slide blocks, 44a and 44b are rodless air cylinders 42a and 42b slide blocks, and 45a and 45b are close Switch, 51, 52, 53, 54, 55, 56 and 57 are pulleys, 6a and 6b are wires, 7a and 7b are weights, 8 is a brush roller, 9 is a means for taking out the bag, 91 is a sucker, 92 is Swivel arm, 93 and 94 are shafts, 95 and 96 are Sprocket, 97 endless chain 98 is a crank mechanism 99 sends rod, 10 is a lug chain in the next step.
[0012]
The apparatus shown in FIGS. 1 to 5 has two guide bars 2a for aligning the bottom end 1a of the bag group 1 on one side surface and the opening end 1b of the bag group on the other side surface. The magazine 2 is provided with a guide plate 2b (FIG. 3) and a feed belt 3 as feed means for advancing the bag group 1 on the bottom surface thereof. The magazine 2 extends in the horizontal direction, and in the bag group 1, the bottom end 1a is located at the back of FIG. 1 (right hand in FIG. 3) and the open end 1b is located at the front of FIG. 1 (left hand in FIG. 3). Then, the bag is stowed upright with the length direction of the bag horizontal (that is, in the state of being laid down), and the bottom end portion 1a is stored in the forward direction (right hand in FIG. 1). At the outlet of the magazine, a presser plate 2d for pressing the bag body side edge located at the upper part of the bag group 1 and a ball bearing 2e are attached.
[0013]
Either one presser plate 4a or 4b that substantially presses only the bottom end 1a from the back (left hand in FIG. 1) is in contact with the bag group 1. On the other hand, since the opening end 1b of the bag group 1 is free, the bag group in the magazine does not have a fan shape (as seen in FIG. 6 or FIG. 7).
[0014]
The presser plate 4a is guided through the pulleys 51, 52, and 53, and pulled toward the front (right hand in FIG. 1) by the wire 6a that is weighted by the weight 7a. Press 1a. Similarly, the presser plate 4b is guided by the pulleys 54, 55, 56, and 57 and pulled by the wire 6b that is weighted by the weight 7b, so that the bag body (in place of the presser plate 4a) is pulled. The bottom end 1a of the group 1 is pressed.
[0015]
The feed belt 3 is an endless belt that rotates via pulleys 31, 32, 33, and 34, and is provided with a fine groove extending along the entire width in the width direction. The feed belt 3 is driven by a reduction gear capable of continuously changing speed by a drive source of a processing machine (not shown) (that is, the next process) connected to the automatic bag feeder. The reduction ratio is such that the bag body 1 sent out from the automatic bag feeder is transferred at a predetermined interval (or pitch) in the next step, for example, while a transfer means such as a lug chain moves forward by one pitch. The feed belt 3 is preferably adjusted to advance by a distance corresponding to the thickness of the bottom end portion 1a for one bag.
[0016]
The brush roller 8 is located near the top of the bag group sent by the feed belt 3, at least the front wall of the open end 1b of the most advanced bag 1 and the position of the front wall of the bottom end 1a of the bag. The role of moving forward. Since the brush roller continuously rotated at a slightly higher peripheral speed than the feed belt 3 and was left free until now, it was delayed from the bottom end of the bag or at least delayed by the thickness of the bottom. The open end in position is forcibly advanced halfway. As a result, the state-of-the-art bag body is surely adsorbed by the suction cup 91 of the bag body take-out means 9 along the edge contacting the feed belt 3 and fed onto the lug chain 10 in the next process. . At this time, the presser plate 2d prevents any one of the bag bodies from being pushed upward, thereby preventing the suction plate 91 from coming off the suction position, and the ball bearing 2e makes it easier to take out the bag body 1 adsorbed by the suction cup 91.
[0017]
The structure of the bag body taking-out means 9 is conventionally known and is not particularly new. The suction cups 91 are mounted in a straight line on a shaft 93 that is rotatably mounted at the distal ends of a pair of left and right turning arms 92. A sprocket 95 is fixed to one end of the shaft 93. A sprocket 96 is rotatably fitted to a shaft 94 that is a turning axis of the turning arm 92, and the sprocket is fixed on a bracket (not shown) that rotatably supports the shaft 94. When 92 turns, the sprocket 95 and the turning arm 92 rotate relative to each other. Both sprockets 95 and 96 are connected by an endless chain 97.
[0018]
The swing arm 92 is swung at a predetermined angle by a crank mechanism 98 driven by a drive source (not shown) of the next process, and is moved from a position indicated by a solid line to a position indicated by a broken line as shown in FIGS. Move. At this time, as described above, relative rotation occurs between the sprocket 96 and the swivel arm 92, and when the chain 97 is rotated in the direction of the arrow in FIG. 5, the suction cup 91 is also in the direction of the arrow, that is, opposite to the clock in the figure. , The bag is taken out from the magazine 2 and supplied onto the lug chain 10 in the next process.
[0019]
Next, replenishment of the bags when the number of bags in the magazine becomes small will be described.
3 and 4, the presser plate 4a is attached to the slide block 43a of the upper rodless air cylinder 41a, and the operation of the rodless air cylinder causes the width of the apparatus, that is, in the drawings. Move towards the left and right hand. When the left hand is positioned, the bottom end of the bag group is pressed, and the right hand is when leaving the bag group and returning toward the back of the apparatus (left hand in FIG. 1). The presser plate 4b is attached to the slide block 43b of the lower rodless air cylinder 41b and operates in the same manner as the presser plate 4a. The cuts S provided in the presser plates 4a and 4b prevent the presser plate from colliding with the guide bar 2a when the presser plate moves forward (to the left hand in FIG. 4).
As shown in FIGS. 1 and 2, the holding plates 4a and 4b are attached to the rodless air cylinders 41a and 41b, respectively, and are pulled by the wires 6a and 6b that are weighted by the weights 7a and 7b. Alternatively, the rodless air cylinders 42a and 42b move forward and backward in the longitudinal direction of the apparatus (left hand and right hand in FIG. 1), that is, in the bag feeding direction.
[0020]
As described above, the presser plates 4a and 4b are guided through the plurality of pulleys and pulled by the wires 6a and 6b that are weighted by the weights 7a and 7b, so that the bottom end portion of the bag body group 1 is pulled. The pressure advances and advances each time the bags are taken out one by one. When returning to the rear, the rodless air cylinders 42a and 42b are moved from the right hand to the left hand in FIG. For this reason, the holding plates 4a and 4b are not fixed to the slide blocks 44a and 44b of the rodless air cylinders 42a and 42b, and maintain a certain distance between the slide blocks 44a and 44b when moving forward. When moving back and moving backward, it is pushed by these slide blocks and moves at once. That is, when the presser plate 4a or 4b moves forward and approaches the slide blocks 44a and 44b at a predetermined interval and the proximity switch 45a or 45b senses this, the solenoid that sends compressed air to the rodless air cylinder 42a or 42b. The valve is opened momentarily and the slide block 44a or 44b is moved forward (right hand in FIG. 1). In this way, the slide blocks 45a and 45b are prevented from interfering with the press plates 4a and 4b that advance with the weights of the weights 7a and 7b.
[0021]
When the number of bags in the magazine is low, the procedure for refilling the bags is as follows. Then, for example, hold-down plate 4 b is, assuming that not press the bottom end 1a of the bag body group, the new bag group is supplied to the right hand of the pressing plate 4 b of the rear, in other words 1 pressing plate 4a The When the supply of a predetermined amount of the bag body of the bag body is completed, when a predetermined switch operation, first, the pressing plate 4 a is by the operation of rodless air cylinder 41 a, and advanced downward in FIG. 2, then pressing plate 4 a is pulled to the wire 6 a which is subjected to weighted by weight 7 a, pressing the bottom end 1a of the newly supplied bag group. Then holding plate 4 b is retracted from the pressing position (moved to the right in FIG. 4) by operation of the rodless air cylinder 41 b, and then by operation of rodless air cylinder 42 b, is pushed by the slide block 43 b Move to the left hand of FIG. 1 and wait there.
[0022]
In the present invention, the two presser plates are not provided as described above. For example, one presser plate that is pulled by a wire weighted by a weight and presses only the bottom end 1a of the bag group 1 is manually operated. You may move it with.
The apparatus shown in FIGS. 1 to 5 is divided into two blocks denoted by reference characters L and R in FIG. 3 so as to fit bags of different lengths. Then, when the block R is moved back to the position shown by the dotted line in FIG. 3 by rotating the feed rod 99 with a reversible motor or a manual crank, the magazine 2 can accommodate a longer bag.
[0023]
【The invention's effect】
As described above in detail, according to the present invention, when a bag body having a large difference in thickness between the bottom end portion and the open end, such as a square bottom bag, is stored in a magazine, the side end surfaces of these bag body groups are Providing an automatic bag feeder that prevents the fan from being fan-shaped, facilitates manual supply to the magazine of the bag body, reduces the frequency of the operation, and can reliably take out the bags one by one. can do.
[Brief description of the drawings]
FIG. 1 is a schematic side view of an automatic bag feeder according to an embodiment of the apparatus of the present invention.
FIG. 2 is a schematic plan view of the apparatus of FIG.
3 is a schematic end view of the apparatus of FIG. 1 as viewed from the direction of arrow A. FIG.
4 is an enlarged view of a main part of FIG. 3;
FIG. 5 is an enlarged view of a main part of FIG. 1;
FIG. 6 is a perspective view showing a state in which a plurality of square bottom bags are stacked on a flat surface.
FIG. 7 is a schematic side view when a plurality of square bottom bags are accommodated in a magazine of a conventional bag feeder.
[Explanation of symbols]
1: bag or group of bags, 1a: bottom end or bottom end, 1b: open end or open end, 2: magazine, 2a: guide bar, 2b: guide plate, 2c: block, 2d: presser plate, 2e: Ball bearing, 3: Feed belt, 31, 32, 33, 34: Pulley, 4a, 4b: Presser plate, 41a, 41b, 42a, 42b: Rodless air cylinder, 43a, 43b, 44a, 44b: Slide, Block, 45a, 45b: Proximity switch, 51, 52, 53, 54, 55, 56, 57: Pulley, 6a, 6b: Wire, 7a, 7b: Weight, 8: Brush roller, 9: Removal means, 91: Suction cup, 92: swivel arm, 93, 94: shaft, 95, 96: sprocket, 97: endless chain, 98: crank mechanism, 99: feed rod, 10: lug chain, S: notch.

Claims (1)

One end is closed to form a hexagonal bottom, and the other end is an open end, or a plurality of bag groups, or one end is closed to form a square bottom, and the other end is In an automatic bag feeder having a magazine for accommodating a plurality of bag bodies having pleat portions as open end portions and means for taking out the bag bodies one by one from the magazine at predetermined intervals, at least A horizontally extending magazine that accommodates the bottom end of the bag body along one side edge of the magazine and the opening end thereof aligned along the opposite side edge of the magazine; (A) a bag group feeding means for advancing the bag group by a distance corresponding to the thickness of the bottom end formed on the hexagonal or square base of the bag taken out from the magazine; , free open end of the bag member are aligned along one side edge of the (b) magazine And, pressing only bottom end that is aligned along the other side edge of the traveling direction rearward, and the bottom end portion pressing means to move forward in accordance with the advancement of the bag body group, (c) said magazine The front wall of the opening end portion of the bag body located at the top of the bag body group to the position of the front wall of the bottom end portion of the bag body at a speed slightly higher than the feed speed of the feeding means of the bag body group. And an automatic bag feeder.

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