JP2528896Y2 - Bag supply device in automatic packaging machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to an improvement of a bag feeding device in an automatic packaging machine.

(Prior Art) A bag feeding apparatus is an apparatus which supplies a plurality of bags stacked in a bag box in advance to a next process by a suction cup, and the conventional bag feeding apparatus is shown in FIGS. This will be described with reference to the drawings.

In the figure, H is an underframe for stacking empty bags P, left and right side plates 5a, 5b and rear side plates 5c, 5d are erected on the frame 1 to form a U-shaped box, and the frame 1 The bottom plate 2 is supported via a pair of support rods 3 and 4 that pass through the perforated holes, and empty bags P are stacked on the bottom plate 2.

A rack 6 is formed on one of the support rods 4 for supporting the bottom plate 2 from below, and a pinion gear 7 attached to a rotating shaft of a motor 11 meshes with the rack 6, and when the motor 11 is rotated. The bottom plate 2 moves up and down via a rack 6. At this time, the other support rod 3 is provided with a pair of dogs 3a and 3b, and a lower part of the frame 1 is provided with a rod 10 in parallel with the support rod 3; A pair of limit switches 10a and 10b are attached, and the dogs 3a and 3b of the support rod 3 come into contact with each other in the above-mentioned elevating operation so that the elevating range of the bottom plate 2 is regulated.

Reference numeral 8 denotes a detection lever, which is swingable about a fulcrum 14. The detection lever 8 is driven by a spring 15 so that its tip 8a comes into contact with the uppermost surface of the empty bags P stacked on the bottom plate 2. Pulled down. That is, the detection lever 8 swings according to the height of the stacked empty bags P, and the swing operation is detected by the limit switch 9. Reference numeral 16 denotes a connecting plate connecting the side plates 5a and 5b and the rear plates 5c and 5d.

Next, the operation of the bag feeding device will be described. Before starting bag feeding, bottom plate 2
At the top, empty bags P are stacked up to the position (a) in FIG. 4, at which time the detection lever 8 and the limit switch 9 are separated (that is, the limit switch 9 is off). When the supply of the bags is started and the number of empty bags P in the bag box decreases and the uppermost position thereof gradually moves downward, the detection lever 8 also swings in conjunction with the movement. When the uppermost position comes to the position (b), the detection lever 8 comes into contact with the limit switch 9. Then, the motor 11 operates to raise the support rod 4 via the pinion gear 7 and the rack 6, so that the uppermost position of the empty bags P stacked on the bottom plate 2 also rises. And the top position is (a)
The detection lever 8 separates from the limit switch 9 again, the motor 11 stops, and the movement of the bottom plate 2 also stops.

The above operation is repeated, and as the number of empty bags P on the bottom plate 2 decreases, the support rods 3 (and 4) gradually move upward.

When the dog 3a comes into contact with the limit switch 10a, the motor 11 operates in the reverse direction and the bottom plate 2 descends. At its lowest position, the dog 3b comes into contact with the limit switch 10b, the motor 11 stops and the descending operation stops.

(Problem to be Solved by the Invention) In the above-described conventional bag feeding apparatus, the empty bag P on the bottom plate 2 is lost or becomes small, and the empty bag P is newly grasped manually. It had been refilled to full capacity. By the way, the number of empty bags P to be stacked on the bottom plate 2 is limited and cannot be stacked too much, so that the number of refills increases. Moreover, since the empty bag itself is a thin sheet, there is a drawback that the work of replenishing between the sandwiching side plates is considerably complicated.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a bottom plate configured to stack a large number of empty bags, an elevating means for vertically moving the bottom plate to a predetermined height, and a periphery of the bottom plate. In a bag supply device including a side plate erected on the bottom and a sensor for detecting the uppermost position of the empty bags stacked on the bottom plate, the elevating means can enter and exit the bottom of the U-shaped box body having an open front surface. A plurality of cassettes in which a slit is bored, a bottom plate is placed on the upper surface, and empty bags are stacked are created, and empty bags are refilled by exchanging the cassettes.

(Embodiment) FIG. 1 is a perspective view of a cassette 13 used in the present invention, wherein a slit 13b is formed in a bottom member 13a of a U-shaped box having a front side plate opened. Here, the vertical, horizontal, and height dimensions of the U-shaped box are fitted with a little clearance into the enclosure between the left and right side plates 5a, 5b and the rear side plates 5c, 5d formed on the frame 1 described above. The slit 13b is provided parallel to the front opening at the center of the bottom member 13a, and the width l of the slit 13b is equal to the lifting means, that is, the support rod 3. , is dimensioned to 4 of the upper plate 17 is inserted to support the bottom plate 2 ^I placement in the cassette from below, makes possible a and free lift. Many previously empty bags P are stacked in this Sai bottom plate on 2 ^I.

FIG. 2 and FIG.
FIGS. 4A and 4B are a front view and a side view showing a state in which the receiving plate 12 is attached to a lower inner wall of the left and right side plates 5a and 5b adjacent to the frame 1. FIGS.
a, 12b are provided, and the cassette 13 is inserted into the receiving plates 12a, 12b such that the left and right side surfaces of the bottom member 13a are placed. Thus, it is to raise the support rod 4 in the drive after the motor 11, formed at the same time supporting rod 3 be increased from slit 13b of the cassette 13 to support the rear surface of the bottom plate 2 ^I at its upper 17 .

When the motor 11 is driven as described above, the support rods 4 and 3
Rises, the uppermost position of the empty bag P rises, and at this rising point, the detection lever 8 separates from the limit switch 9 and the motor 11 stops. On the contrary, the uppermost empty bags are taken out one by one by a gripping means (not shown), which is no different from the conventional one described above.

When the empty bag P in the cassette 13 becomes small due to the repetition of the above operation, the dog 3a is set to the limit switch.
10a, the motor 11 changes to the reverse rotation, and the bottom plate 2 is lowered. In the lower position, the dog 3b comes into contact with the limit switch 10b to stop the rotation of the motor 11 and stop the lowering operation. .

By the way, in the above state, the empty cassette 13 is pulled out to the open side of the underframe H, and another cassette prepared by loading empty bags is inserted on the receiving plates 12a and 12b. Bagging can be started in the same manner as described above.

(Effect of the Invention) The present invention is implemented as described above, and is capable of quickly and accurately replenishing empty bags using a plurality of cassettes. The height of the cassette is 500mm, and it depends on the bag, but it is possible to load about 1500 sheets, which contributes to the improvement of the operation efficiency.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cassette used in the present invention, FIGS. 2 and 3 are views showing the state of use of the cassette, FIG.
FIG. 3 is a side view, FIG. 4 is a front view of a conventional apparatus, and FIG. 5 is a side view of the same. H ... Underframe, 1 ... Frame 2, 2 ^I ... Bottom plate, 3, 4 ... Support rod 6 ... Rack, 10 ... Rod 10a, 10b ... Limit switches 13 ... Casset, 13b ... Slot

Claims (1)

(57) [Scope of request for utility model registration] A bottom plate for stacking a large number of empty bags;
In a bag feeding apparatus comprising: elevating means for moving the bottom plate up and down to a predetermined height; a side plate erected around the bottom plate; and a sensor for detecting the uppermost surface position of empty bags stacked on the bottom plate. A plurality of cassettes, in which a slit capable of being moved up and down by a lifting means is pierced at the bottom of the U-shaped box body having an open front surface, a bottom plate is placed on the upper surface, and empty bags are stacked;
A bag supply device in an automatic packaging machine, wherein empty bags are refilled by exchanging the cassette.