JPH03176338A - Feeding device for packaging bag for packaging machine - Google Patents

Abstract

PURPOSE:To improve the linkage mechanism and make adjustments almost unnecessary by a mechanism wherein, to a reversible rotary shaft rotated by a push-pull rod, a forwardly-backwardly moving lever, which feeds a packaging bag to a grip between a pair of bag-grippers in a packaging machine, and a second swing suction arm are connected to effect related mechanical performances. CONSTITUTION:A first swing suction arm 9 takes a position I for suction with a suction cup 12 and a sucking cup 13 in contact with the top one of packing bags (a) laid in a pile to a constant height at all times in a case 6 of bags, when a second swing suction arm 18 takes substantially a horizontal position as a result of rotation of a reversible rotary shaft 17 caused by rise of a push-pull rod 24 and holds a packaging bag (a) vertical at a feed position IV with a suction cup 21 and a sucking cup 22 of the arm acting on the bag at the opening. At this time, as a result of rise of a closure-forcing rod 49, a first thrusting piece 47 and gears 39, 40 conjointly hold grippers 42, 43 in an open position so that the opening of the bag is placed between the grippers 42, 43. Subsequently the closure-forcing rod 49 moves downward, causing the grippers 42, 43 to close, and the packaging bag (a) is moved to the forward end of a forwardly-backwardly moving lever 32 simultaneously with a break in the suction by the suction cup 21 and the sucking cup 22.

Description

Detailed Description of the Invention (Industrial Field of Application) The packaging bag feeding device for a packaging machine of the present invention is a feeding device that tensions and feeds a packaging bag between one bag gripping arm of a packaging machine. Accordingly, the link cooperation allows for tighter and more accurate cooperation in the supply/opening operation than in conventional devices of the same type.

(Prior art and problems requiring improvement) Conventional packaging bag feeding devices for packaging machines are disclosed in Japanese Patent Publication No. 52-11822 and Japanese Patent Publication No. 3-12530. In 511, there is a first swinging!f8h suction spell that sucks the top layer of packaging bags stacked in the case near the bag opening and lifts the bag opening to the delivery position, and the first swinging suction arm transfers the bag. At position F7, pick up the bag opening near F and receive it, and then vertically supply the packaging bag at position F7.
1. The device is equipped with a second oscillating suction arm, and the second oscillating suction arm receives the bag opening of the packaging bag vertically at the supply position, and is rotary type. It is necessary to provide a pair of clamping pieces as a component to be fed between a pair of bags such as VL and M, but rather than moving each one by a separate operating system and interlocking them by temporal coordination. , accurately connected by link mechanism! ! ! It is more desirable to have a force of 1J, and this is a problem that requires improvement.

(rjAX to be solved by the present invention/object of the present invention)
The object of the present invention is to solve the conventional problem by using a link tjl component to further improve the coordination of feeding the packaging bag into the packaging machine, and to increase the reliability of the coordination operation.
This is the purpose.

(Means for Solving the Problems) The present invention is based on the above-mentioned v! This problem is solved by a first swinging suction arm that sucks the top layer of cotton packaging bags stacked in a case near the bag opening and lifts it up to the delivery position, and a first swinging suction arm at the delivery position. In this device, a second oscillating suction arm that suctions and receives the vicinity of the bag opening from the arm and makes it vertical at the supply position has a reversible rotary shaft that is rotated by the reciprocating movement of the rod, which is pivotally supported on the vertical part of the frame. A second swing suction arm is connected in a T-shape around the axis of the shaft, a longitudinally movable rod is pivotally supported at the lower end of the link whose upper end is pivotally supported on the horizontal part of the frame, and the longitudinally movable rod is connected from the reversible rotating shaft. Connected to the protruding arm, the second swing suction arm and the longitudinally movable rod are linked via a reversible rotating shaft, and a pair of rotating shafts are pivotally supported at the curved ends of the longitudinally movable rod, so that each rotation II! 1
The pair is provided with an interlocking tool and a pair of clamping pieces for clamping the opening of the packaging bag vertically held by the second swing suction arm from the front and back, and the pair of clamping pieces is attached to a protruding piece protruding from the rotation shaft on the rear side. The present invention relates to a packaging bag feeding device for a packaging machine, characterized in that vertically moving rods are connected to each other for controlling the closing motion and the release motion, and the coordinated mechanical motion of each part can be further improved.

A preferred embodiment of the invention will now be described.

(Example) The attached RF drawing shows an example of the present invention.
Figure i shows the first swing @ the landing arm 9 which is flipped down and the second swing suction arm 18
Fig. 2 is a partially cut-away side view showing the opposite state to Fig. 1, and Fig. 3 is a partially cut-away front view of the back seen from the left side of Fig. 2. , 1 Figure 4 is Figure 1A-
5 is a front view of the back section cut along the line B-B in FIG. 1; FIG. 6 is a perspective view of the clamping pieces 42, 43 and the pushing piece 44;
FIG.

1 is a machine base, and 2 is a gate-shaped frame erected on the machine base 1, consisting of a vertical part 3 and a horizontal part 4. Reference numeral 5 designates a pair of packaging bag gripping pieces of the packaging machine that correspond to the tip (right side in the figure) of the horizontal portion 4 in FIG.

Reference numeral 6 denotes a bag case whose part is aligned with the lower part of the frame 2, and the height of the packaging bags a stacked in the case is detected by a detector 7 to maintain a constant height, as is known in the art. Raise case 6 and keep packaging bag a constant? :fJ
Let's do it.

The pivot arm 8 at the lower part of the vertical part 3 has a swing position from the Ij2 suction position (solid line in Figure 1) to the delivery position (■) shown by the JJ'l line in the same figure and the solid line in Figure 2! The bent arms 14 attached to both ends of the first oscillating suction arm 9 that repeats IJJ motion are pivoted, and the first oscillating suction @
A bag roll L is made up of a pipe 10 having a square cross-section approximately equal to the gold mine of the packaging bag a at the free end of 9. A suction cup 12 with a large number of suction ports 11 on the corresponding surface, and the rear (lower part) of the suction cup 12. A pair of circular suction cups 13 (see FIG. 8) provided near the left and right ends of the bag opening, and the +I of the suction arm 9
A rod 15 is provided to swing the b-arm 14 as described above.

A reversible rotating shaft 17 is attached to a shaft support piece 16 provided in the upper part of the vertical part 3.
and a second
Rocking adsorption l1li! 18 are connected in a T-shape to enable flipping up as shown in FIG. 1 and flipping down as shown in FIG.

At the free end of the suction arm 18, there is a suction cup 21 which is made of a pipe 19 with a rectangular cross section that is approximately equal to the gold mine of the packaging bag a, and has a suction port 20 with a large capacity on the surface corresponding to the bag opening, and the suction g121.
Attach a pair of circular suction cups 22 near the left and right ends of the bag opening at the rear of the bag, and attach the suction cups 21 and 22 to the first arm 23 fixed to the reversible rotating shaft 17 at the delivery position (2). A push/pull rod 24 is attached that repeatedly swings between a receiving position (2) where they are in contact and parallel (see Fig. 8) and a supply position (2) which is almost horizontal.

The suction cups 12 and 21 and the suction cups 13 and 2 provide separate air space systems, respectively. By doing this, even if there is a problem in one side of the short buying system, all of them will not be absorbed.

The horizontal part 4 of the frame 2 has a pair of front and rear links (parallel links) 26.26, each of which has its upper end supported by a phase 28.28.The links 26.26 are shown in FIG. 4 and clearly shown in FIG. As shown, they form a pair on the left and right, and a common arm shaft 29.29 is passed through the lower end of each, and a front-rear movable rod 32 that moves the front f! in an almost horizontal position is attached to the two.Front f& movable rod 32 consists of two M29.2 '3'-r parallel, fill?lI/) fd1291: Yuzu 35 at the free end of the second arm 34 with one connected rod 33 fixed to the reversible rotating shaft 17. Connect to.

A pair of rotating shafts 37.38 running downward with the pongee 29.29 are pivotally supported at the # end of the m f & moving rod 32.32, and gears 39.40 (the present invention (This is an example of an interlocking tool) and a clamping piece that grips the bag opening of the package gRa, which is held in a vertical position as shown in FIG. Insert 42.43. The clamping piece 42 to be fitted to the front rotating shaft 37 may be above the middle of the bag opening, but the #* fitting piece 43 of the rear rotating shaft 38 should be placed in the center of the bag opening from the f& side in the longitudinal direction. The clamping piece 43 should be in contact with each other.
At the moment when the clamping piece 42.43 comes into contact with the F1@ side of
8 to 311%.

A first projecting piece 47 is provided on the rear rotating shaft 38, and a pushing piece 44
．． A second protruding piece 48 is provided on each of the clamping pieces 44, and a closing force rod 49 is connected to the first protruding piece 47 for controlling the opening/closing, that is, the closing and releasing movements of the clamping pieces 42 and 43. If the second projecting piece 48 is slid freely through the yuzuri holder 52 fixed to the vertical part 3 of the frame 2 above the longitudinally movable rod 32 and pulled)
251 is connected to the rods 50. The rod 50 abuts the stopper 53 against the bearing 52 and the like, and its pulling action by the pulling spring 51 is restricted.

Should I pull the rod 50? A, 51 and the stopper 53 act to flip the pusher piece 44 backward as shown by the solid line in FIG.

In this embodiment, the first oscillating suction rQ9 is attached to the suction cup 12.
As shown in Figure tlS1, the suction cup 13 is placed in the suction position I where it touches the upper layer of packaging bags a that are always at a constant height stacked in the bag case 6, and the second swing suction arm 18 is placed on the reversible rotating shaft. 17 rotates in the counterclockwise direction in FIG. 1 due to the rise of the push-pull rod 24, and becomes an almost horizontal angle, and since the bag opening is sucked by the suction cups 21 and 22, the packaging bag a is supplied. Make it vertical at position ■.

At this time, the closing force rod 49 rises, and the first protruding piece 4
7 and gears 39.40, the bag opening enters between the clamping pieces 42.43, and then the closing force rod 49 descends to close the clamping pieces 42.43. are closed and the package 9B is moved to the tip of the longitudinally movable rod 32, and at the same time, the suction cups 21 and 22 are stopped. When this is completed, the push/pull rod 24 descends, rotates the reversibly rotating yuzumi 17 clockwise, and the second swinging suction arm 18 descends toward the receiving position (■) as shown in Figure 2, but the reversible rotating shaft 17
The longitudinally movable rod 32, which is interlocked with the second swinging suction arm 18, moves forward while swinging the links 26 and 26 along with the clockwise rotation of the second arm 34, and moves to the supply position i?
! In step (3), the packaging bag a clamped by the clamping pieces 42 and 43 is advanced between the pair of front bag gripping pieces 5 for packaging.

Bag opening b of packaging Ra 1. is sandwiched between the front clamping piece 42 and the rear clamping piece 43, so that as the longitudinally moving rod 32 moves forward, both sides of the center hole in the rc direction of the bag mouth are bent rearward due to wind pressure. However, in this case, the stopper 53 of the rod 50 separates from the bearing 52 etc. as shown in the ttrJ2 diagram as the longitudinally movable rod 32 moves forward. If you take her with you) 251
pulls the second projecting piece 48.48 by the rod 50, causing the pushing piece 44.44 to rotate counterclockwise in FIG. 44 to tension the entire length of the bag opening into a straight shape.

The pushing pieces 44 that operate with a delay on both sides of the rear clamping piece 43 are provided as shown in FIG. This is due to the positional relationship between the rear clamping piece 43 and the bag-side front piece pair 5 of the packaging. That is, since the clamping pieces 42 and 43 are used to clamp the bag opening, they must be higher than the gripping pieces 1 and 15 mentioned above.
It will be easier to transfer the packaging bag a if the supply position ■ is also a little higher. Since the arm 18 intersects with the supply position (T), the arm 18 is at the supply position ff1l.
This is because, if the pushing piece 44 is moved with a delay with the advance of the longitudinal movable rod 32 after descending from the V position, the disadvantage of the T-crossing described in 11+J can be eliminated. Although it is not necessary to provide the push piece 44 by devising the above-mentioned positional relationship, it is obviously difficult to do so.

When the clamping pieces 42, 43 and the pushing piece t4 are brought into alignment with the packing (pushing) Pa young piece pair 5 as shown in FIG. The left and right spacing is slightly narrowed, and the lock claws are closed to grasp the package 9a.Therefore, the closing forcing rod 49 is slightly raised, and the first projecting piece 47
Spread the clamping pieces 42, 43 through.

At that time, the second swing suction arm 18 is lowered to the receiving position ■,
At the same time, the rod 15 causes the first swing suction arm 9 to suction the bag opening of the packaging bag a on the case 6 and lift it to the delivery position (2), so that the bag opening is alternately supported as is well known. The push-pull rod 24 rises, and the reversible rotating shaft 17 rotates counterclockwise again to move the second swing suction arm 18 to the almost horizontal supply position (2) as described above, and on the other hand, the 3
2 is moved back as shown in FIG. 1 by the second arm 34 as the reversible rotating shaft 17 rotates counterclockwise, and the clamping pieces 42, 43-. of the next packaging bag a are transferred, and then, It's the same cycle as above.

(Function) In the present invention, a reversible rotary cypress 17 that is rotated by the reciprocating movement of a push-pull rod 24 is pivotally supported on the vertical part 3 of the frame 2, and a second oscillating suction arm 18 is arranged around the axis of the shaft 17 in a T-shape. A link 2G that is connected and whose upper end is pivotally supported on the horizontal part 4 of the frame 2
A longitudinally movable rod 32 is pivotally supported at the lower end of , 26, and the longitudinally movable rod 32 is connected to an arm protruding from the reversible rotating shaft 17, thereby reversibly rotating the second swinging arm 18 and the longitudinally movable rod 32. A part of the rotating shafts 37.38 is connected to the front end of the longitudinally moving rod 32 through the shaft 17, and each pair of rotating shafts 37.38 has three pairs of gears, 40 or other suitable known gears. An interlocking tool and a pair of clamping pieces 42 and 43 are provided for clamping the bag opening of the packaging bag a vertically held at the supply position ■ by the second swinging arm 18, and A pair of clamping pieces 42 and 43 are attached to the protruding piece 47.
C), which produces the operations described in the direct connection embodiment (excluding those related to the pushing piece 44).

(Effects) The present invention utilizes the forward and backward movable rod 32 and the second swinging suction arm that cause the operation of transporting the packaging bag a transferred from the supply position (■) to the clamping piece 42, 43 between the bag clamping front lights of Shigeru (Shigeru). 18 and is connected to a reversible rotary shaft 17 rotated by a push/pull rod 24, related operations are performed by a link mechanism, and the operation is continuous, so that almost no adjustment is required and there is no possibility of failure. It has the effect of accurately preventing

[Brief explanation of drawings]

The attached drawings show one embodiment of the present invention. Figure @1 is a partially cutaway side view with the first swinging suction plate 9 flipped down and the fjS2 swinging suction plate 18 flipped up, and the second The diagram is! 51 is a partially cutaway side view showing the opposite state, FIG. 3 is a partially cutaway front view of the back seen from the left side of FIG. 2, i! Figure 34 is Figure 1A
-A line cut plan view, Figure 5 is a back front view cut from Pt41 B-B#X, Figure 6 is the clamping piece 42, 43 and the pushing piece 44.
FIG. 7 is a side view of the pusher piece 44, and PIS8 is a perspective view of @ landing plate 12 and @ JB13, @ landing plate 21, and suction cup 22. 9a→Packaging! J b→Bag opening 1→Iso stand 2→Frame 5→G1 grip of the packaging machine 9→First swinging suction arm 12→Suction cup 13→Suction cup I→Suction cup ■→Delivery position■→Receiving position ■→Supply position 17→Reversible rotation Yuzu 18→Second swing suction arm 21→Suction cup 22→Suction cup 24→Push/pull rod 2G, 26→Link 28.28
→ Shaft 29.29 → Closing shaft 32 → Back and forth moving rod 33 → Rod 34 → Second arm 35 → Shaft 37.38 → Rotating shaft 39.40 → Teeth $ 42.43 → Clamping piece 44 → Pushing piece 5th figure

Claims (1)

[Claims] a first oscillating suction arm that suctions the top layer of one of the packaging bags stacked in the case near the bag opening and lifts it to a delivery position; In a device comprising a second swinging suction arm that is vertical at the supply position, a reversible rotating shaft that rotates by reciprocating movement of the rod is pivotally supported on the vertical part of the frame, and the second swinging suction arm is arranged around the axis of the shaft. are connected in a T-shape, a longitudinally movable rod is pivotally supported at the lower end of the link whose upper end is pivotally supported on the horizontal part of the frame, and the longitudinally movable lever is connected to an arm protruding from a reversible rotating shaft to create a second rocker. The movable suction arm and the longitudinally movable rod are linked via a reversible rotating shaft, and a pair of rotary shafts are pivotally supported at the front end of the longitudinally movable rod, and an interlocking tool is attached to each pair of rotary shafts, and a second swingable suction arm is provided. A pair of clamping pieces are provided for clamping the opening of the packaging bag vertically from the front and back, and a closing force rod is provided on a projection protruding from the rotating shaft on the rear side to control the closing and releasing movements of the pair of clamping pieces. A packaging bag feeding device for a packaging machine, characterized in that: