JP4010685B2 - Empty bag stocker device for supplying empty bags to the conveyor magazine of a bagging and packaging machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an empty bag stocker device for supplying empty bag groups to an empty bag storage device (conveyor magazine) of a bag filling and packaging machine.
[0002]
[Prior art]
In the empty bag supply process in the bag supply type bag filling and packaging machine, an empty bag storage device that can store a large number of empty bags (empty bag group) is installed. Adsorbed by a suction cup and picked up one or two at a time and supplied to the gripper of the packaging machine.
Various forms of the empty bag storage device have been proposed corresponding to the form of the bag to be used.
[0003]
As an example suitable for a flat bag or a self-supporting bag, for example, an empty bag storage device (also referred to as a liftable magazine) described in Japanese Patent Application Laid-Open No. 59-143829 is known. This empty bag storage device has a rectangular box-shaped outer shape, in which empty bags are stacked and stored in a laid state, and are sequentially taken out from the empty bag located at the top and supplied to the packaging machine. It is a thing. In this empty bag storage device, the bottom plate rises as the empty bags decrease, and the height of the empty bag placed on the bottom plate is always kept within a certain range.
An empty bag storage device (also referred to as a conveyor magazine) described in Japanese Patent Publication No. 58-28166 is known as a bag suitable for a bag with a chuck or a bag with a spout. This empty bag storage device itself is composed of a conveying means such as a conveyor, in which empty bag groups are stored side by side in a sashimi shape (in a state where they are stacked so as to partially overlap). Are sequentially taken out from the empty bag at the foremost position and fed to the packaging machine.
[0004]
[Problems to be solved by the invention]
By the way, the number of empty bags that can be stored in the above-described empty bag storage device is limited, and when the number of stored bags decreases, it is necessary to replenish the empty bag group by the operator each time. On the other hand, since the recent packaging machines tend to have a higher capacity, the number of times the empty bag group is replenished per unit time is inevitably increasing.
Therefore, various devices have been proposed to reduce the number of times of empty bag refilling.
[0005]
For example, an empty bag storage device described in Japanese Patent Application Laid-Open No. 6-156761 arranges two sets of bag bases in the horizontal direction so that they can be moved alternately between a bag supply position to the packaging machine and an empty bag replenishment position. , The other bag base that was emptied while feeding from one bag base is replenished with the empty bag group, and by repeating this, the packaging machine can be fed seamlessly, In this type of empty bag storage device, if the number of bag bases to be installed is greatly increased and a large number of bag bases are replenished with empty bag groups at a time, the number of times of replenishment per unit time can be reduced. However, since the bag bases are installed side by side in the horizontal direction, a large installation space is required only in one direction, and the operator replenishes each bag base while moving in the horizontal direction, so work is not necessary. There is a problem of efficiency.
In addition, the empty bag storage device described in Japanese Patent Application Laid-Open No. 7-2225 has a plurality of bag bases installed on an intermittently rotating conveyor. If the bag base is installed and the empty bag group is replenished to a large number of bag bases at a time, the number of times of replenishment per unit time can be reduced. However, also in this case, a large installation space is required only in one direction, and the replenishment work is inefficient.
[0006]
On the other hand, Japanese Utility Model Laid-Open No. 5-34107 discloses that an empty bag stocker is detachably installed at the back of the empty bag storage device without changing the empty bag storage device itself. If this empty bag stocker is made larger to accommodate a large number of empty bags, the number of empty bags can be reduced, but the empty bag storage device maintains the direction of each empty bag in the larger empty bag stocker. It is difficult to automate the continuous supply, and increasing the size increases the burden of attaching / detaching work by the operator, which is not realistic.
Japanese Patent Application Laid-Open No. 8-337217 describes that a vertical empty bag stocker for stacking and storing empty bag groups in a plurality of stages is installed behind the empty bag storage device so as to be movable up and down. When this empty bag stocker is used, if the number of stacking steps is increased, the number of replenishment per unit time can be reduced, but the installation space is limited to one line in the vertical direction, so it is not possible to take too many stacking steps, and There is a problem that the empty bag replenishment work to the higher level is burdensome and the stock state (such as deviation) cannot be easily confirmed.
[0007]
The present invention has been made in view of the above-mentioned problems of the prior art, and can supply a large number of empty bag groups to an empty bag storage device (especially a conveyor magazine) of a bagging and packaging machine, and the number of times empty bags are replenished per unit time. The purpose is to obtain an empty bag stocker that can reduce
[0008]
[Means for Solving the Problems]
The present invention relates to an empty bag stocker device for supplying empty bag groups to a conveyor magazine of a bagging and packaging machine, wherein a plurality of sets of stockers for stocking empty bag groups along a longitudinal direction are arranged in parallel, and each stocker is a stock and with a conveyor device for the empty-bag group conveying towards the conveyor magazine of the bag-filling packaging machine, to stock the bag bundle stacked so as to partially overlap the top of the bag onto the conveyor device to the front side, the plurality or is moved laterally set of stocker simultaneously, either that one of the front portion of the stocker disposed lateral moving means for Ru adjacent to the rear portion of the conveyor magazine further empty-bag group is present on the conveyor device to the stocker A detection device for detecting whether or not the control device is installed, and a control device for controlling the operation of the lateral movement means based on a detection signal from the detection device is installed. When the stocker detection device adjacent to the conveyor magazine detects that there is no empty bag group on the conveyor device, it activates the lateral movement means to detect that there is an empty bag group on the conveyor device. Any one of the stockers selected from the stockers is adjacent to the conveyor magazine .
[0009]
In the empty bag stocker device, for example, a bag stopper that can be moved forward and backward with respect to the bag transport path can be installed near the tip of each stocker.
Further, in the above empty bag stocker device, each stocker can be provided with a pair of bag guide plates on both sides, and each pair of bag guide plates can change the bag size (bag width) by adjusting the distance between them simultaneously. It is desirable to be able to respond.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Referring to FIGS, illustrating the present invention more specifically.
As shown in the simplified perspective view of FIG. 1 , this empty bag stocker device 1 includes four sets of stockers 2a to 2d (the stocker 2 when the whole stocker or each stocker is shown without distinction), and the stocker 2. A lateral movement means 3 (see FIG. 2) for laterally moving the whole is provided, and the front part of each stocker 2 is arranged so as to be adjacent to the rear part of the conveyor magazine 4. Each stocker 2 includes a belt conveyor 5 (having a plurality of round belts 29... See FIG. 3) that conveys an empty bag group W ₀ stocked in a sashimi shape toward the conveyor magazine 4. Bag guide plates 6a and 6b, a partition plate 7 at the rear, and a bag stopper 10 (see FIG. 2) at the front.
[0011]
The conveyor magazine 4 is the same as that described in JP-A-8-337217, and is a belt conveyor 8 (having a plurality of round belts 52) that conveys empty bag groups W ₀ and W ₁ forward. 3), a fast-feed device 9 (see FIG. 2) installed above the intermediate position of the belt conveyor 8, a feeding device 11 (see FIG. 2), and a push-up device 12 below the belt conveyor 8 in front of the fast-feed device 9. A pair of bag guide plates 13 (only one is shown in FIG. 1) provided on both sides of the belt conveyor 8 are provided.
In the empty bag stocker device 1, the front part of any one of the stockers 2 is arranged adjacent to the rear part of the conveyor magazine 4 (belt conveyor 8) by the operation of the lateral movement means 3. When the group W ₁ decreases, the belt conveyor 5 of the stocker 2 is detected and the empty bag group W ₀ is continuously supplied onto the belt conveyor 8 of the conveyor magazine 4. In this case, lifting the rear portion of the empty-bag group W ₁ by driving the push-up device 12 at the same time, empty-bag group W ₀ is connected to the end of the empty-bag group W _1. On the other hand, the empty bag W fed forward on the belt conveyor 8 by the fast-forwarding device 9 and the feeding device 11 is sucked by the suction cup 14 of the bag feeding device and delivered to the gripper 15 of the packaging machine.
[0012]
Next, the empty bag stocker device 1 will be described in more detail with reference to FIGS.
As shown in FIGS. 2 to 4, in the empty bag stocker device 1, each stocker 2 is installed in parallel with the frame 16, and the lower part of the frame 16 is attached to the slide plate 18 via the support member 17. A pair of slide members 19 and a rack gear 21 are attached in parallel to the pair of slide members 19. A pair of slide rails 23 are installed on the base 22 so as to face the slide member 19, and support the entire stocker 2 so as to be movable laterally. Further, a gear 24 meshing with the rack gear 21 and a drive motor 25 for driving the rack gear 21 are installed in the base 22 and operate intermittently to move the entire stocker 2 laterally by a predetermined distance. Next to the rear of the conveyor magazine 4. These mechanisms constitute the lateral movement means 3.
[0013]
The belt conveyor 5 of each stocker 2 includes a rear end pulley 26, a front pulley 27, a front end small-diameter pulley 28, four feed belts (round belts) 29 hung on the pulleys 26 and 27, and pulleys 27 and 28. 3, and a pulley 26 is driven by a motor 34 through gears 32 and 33. In addition, the belt conveyor 5 of each stocker 2 is driven mutually independently by each motor 34, and the feed belt 29 runs on the receiving plate 30 (refer FIG. 6).
The bag stopper 10 includes a fork-like stopper portion 35 and an elevating cylinder 36 for raising and lowering the fork-like stopper portion 35. The bag stopper 10 is installed on the lower side of the frame 16, and the stopper portion 35 extends from a hole portion 37 formed in the frame 16 to the pulleys 27 and 28. It is possible to project between them (and between the round belts 31).
[0014]
5 to 6 show the width adjusting mechanism of the left and right bag guide plates 6a (6b) of each stocker 2. FIG. Nut-shaped guide support members 38a (38b) are respectively attached to the bag guide plates 6a (6b) at the front and rear positions, and the respective guide support members 38a are provided on the outer adjustment shafts 39, 41 disposed below. Each guide support member 38b is screwed to the inner adjustment shafts 42 and 43. The outer adjustment shafts 39, 41 and the inner adjustment shafts 42, 43 are threaded in opposite directions and are fitted with sprockets 44 arranged in a straight line, and are connected by a common chain 45. Therefore, when the adjustment handle 46 is rotated, the four adjustment shafts 39 and 41 to 43 are all rotated in the same direction, and the guide support members 38a and 38b are simultaneously moved in the opposite direction. That is, according to this adjustment mechanism, by rotating the adjustment handle 46, the bag guide plates 6a and 6b of each stocker 2 are all moved simultaneously and in the opposite directions, and the interval according to the bag size (bag width) is reached. Can be set to
[0015]
In the conveyor magazine 4, the fast-forwarding device 9 includes a driving pulley 47, an arm 48 having one end rotatably attached to the driving shaft, a driven pulley 49 attached to the tip, and a fast-feed belt 51 stretched between both pulleys. The running speed of the fast-feed belt 51 is faster than the feed speed of the feed belt (round belt) 52 of the belt conveyor 8. The feeding device 11 includes a drive pulley 53, a feed wheel 54 having a plurality of flexible protrusions that can slide on the upper surface of the feed belt 52, and a belt 55 stretched around the shafts of the drive pulley 53 and the feed wheel 54. Prepare.
Incidentally, a stopper 56 for stopping the air bag W conveyed on the feed belt 52, 57, 58 detecting device for detecting whether the empty bags W or empty-bag group W ₁ on the belt 52 feed is present, is 59 It is a detection device that is installed in each stocker 2 and detects whether or not the empty bag group W ₀ exists in the stocker. In the empty bag stocker device 1, any one of the stockers in which empty bag groups exist is selected based on the detection signal of the detection device 59, and the stocker is in a predetermined position (position adjacent to the conveyor magazine 4). The lateral movement means 3 is controlled so as to move.
[0016]
Next, the operation of the empty bag stocker device 1 will be described more specifically.
_First , the empty bag group W ₁ is stored in the conveyor magazine 4, and all the stockers 2 are also filled with the empty bag group W ₀ , and the front part of the end stocker 2 a is arranged adjacent to the rear part of the conveyor magazine 4. Suppose that
Each device of the conveyor magazine 4 is up, the fast-forward the empty bag at the beginning of the feed belt 52 in contact with the fast-forward belt 51 in order, are fed forward further by the feed wheel 54 separated from a subsequent empty-bag group W ₁ Then, it comes into contact with the stopper 56 and stops. Here, the detection device 57 detects the presence of the empty bag W on the feed belt 52, and the suction cup 14 adsorbs the empty bag W based on the detection signal and delivers it to the gripper 15.
[0017]
When the above procedure is repeated and there is no empty bag W in the rear portion of the feed belt 52, the detection device 58 detects this, and based on the detection signal, a control device (not shown) is adjacent to the conveyor magazine 4. The motor 34 of the stocker 2a that has been started is started, and at the same time, the elevating cylinder 36 is operated, and the stopper portion 35 that has been raised is retracted downward. As a result, the empty bag group W _{0 on} the feed belt 29 is conveyed toward the belt conveyor 8 of the conveyor magazine 4. At the same time, the control device operates the push-up device 12 based on the detection signal from the detection device 58.
Feed belt 29 empty bag group W ₀ by the operation of the motor 34 is transferred to the upper feed belt 52, it is connected to the rear of the empty-bag group W ₁ lifted by the push-up device 12. At this point, the push-up device 12 moves backward.
[0018]
Progressed Passing empty-bag group W _0, eventually feed the belt 29 empty bag group W ₀ is passed to the upper feed belt 52 completely, detects that there is no empty bag on the detection means 59 sends the belt 29 In response to the detection signal, the control device stops the motor 34 and reversely operates the elevating cylinder 36 to raise the stopper portion 35. Further, the control device drives the drive motor 25 to move the entire stocker 2 laterally by a predetermined distance, and makes the next stocker 2 b replenished with the empty bag group W ₀ adjacent to the conveyor magazine 4.
Are repeated the above process, for example, when there are no more empty-bag group W ₀ from the last stocker 2d, newly replenished empty-bag group W ₀ in all stocker 2. Alternatively, while the empty-bag group W ₀ from the end of the stocker 2d to a conveyor magazine 4 is conveyed, it may be supplemented with empty-bag group W ₀ to the remaining stocker 2 a to 2 c, the choice of the timing of the replenishment appropriately Just do it. When replenishing each stocker 2 with the empty bag group W ₀ , it is only necessary to replenish from the rear of each stocker 2 while driving the motor 34 and moving the belt conveyor 5, and the empty bag group conveyed to the front end on the belt conveyor 5. W ₀ comes into contact with the bag stopper 8 and stops.
[0019]
In the above example, there is a stocker in which the empty bag group W ₀ is always replenished next to the stocker in use. Therefore, the stocker is used in order from the end. A stocker in which the group W ₀ is replenished is detected, and based on the detection signal, one of the stockers (for example, the stocker closest to the currently operating stocker) is selected, and the drive motor 25 the next Oke by the setting of the control device so as to adjoin the stocker conveyor magazine 4, even when stocker empty-bag group W ₀ is not replenished, does not appear hinder the supply to the conveyor magazine 4 .
[0020]
【The invention's effect】
According to the empty bag stocker device of the present invention, a large number of empty bag groups can be supplied to the empty bag storage device (conveyor magazine) of the bag filling and packaging machine at a time, and the number of empty bags to be replenished per unit time can be reduced. . As a result, the burden on the replenishing operator is reduced, and even if it is necessary to stop the packaging machine when refilling empty bags for safety reasons, the number of replenishments is reduced, so productivity does not decrease much, and in the clean room. If aseptic packaging is performed by installing a packaging machine, the number of times the operator enters and exits the clean room is reduced, and the risk of contamination of the clean room can be reduced.
Moreover, since the installation space is not only wide in one direction but is flat, the maximum number of empty bags stored according to the space can be secured, and refilling of empty bags becomes easy.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view of an empty bag stocker device and a conveyor magazine according to the present invention.
FIG. 2 is a side view of an empty bag stocker device and a conveyor magazine according to the present invention.
FIG. 3 is a plan view of the same.
FIG. 4 is a front view of the empty bag stocker device.
FIG. 5 is a partial cross-sectional plan view of a gap adjusting portion of a bag guide plate.
6 is a cross-sectional view taken along lines AA, BB, and CC in FIG.
[Explanation of symbols]
One empty bag stocker device
2a-2d stocker 3 lateral movement means 4 conveyor magazine 5 belt conveyor 6a, 6b bag guide plate 39, 41-43 adjustment shaft

Claims (4)

In an empty bag stocker device for supplying empty bag groups to a conveyor magazine of a bagging and packaging machine, a plurality of sets of stockers for stocking the empty bag groups along the longitudinal direction are arranged in parallel, and each stocker stocks empty bag groups the comprise a conveyor device for conveying towards the conveyor magazine of the bag-filling packaging machine, to stock the bag bundle stacked so as to partially overlap the top of the bag on the conveyor device and on the front side, the plurality of sets of stockers simultaneously laterally moved, one is one of the front portion of the stocker disposed lateral moving means for Ru adjacent to the rear portion of the conveyor magazine, detects whether no further or empty-bag group on the conveyor device to the stocker present And a control device for controlling the operation of the lateral movement means based on a detection signal from the detection device is installed. When the stocker detection device adjacent to the magazine magazine detects that there is no empty bag group on the conveyor device, the lateral movement means is activated to detect that there is an empty bag group on the conveyor device. An empty bag stocker device , wherein any one stocker selected from the above is adjacent to the conveyor magazine . 2. The empty bag stocker device according to claim 1, wherein a bag stopper is provided in the vicinity of the front end of each stocker so as to be movable forward and backward with respect to the bag transport path. 3. The empty bag stocker device according to claim 1 or 2 , wherein each stocker includes a pair of bag guide plates on both sides. 4. The empty bag stocker device according to claim 3 , wherein each pair of the bag guide plates is capable of adjusting a distance between each pair at the same time.

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