JP6713435B2 - Bag feeder - Google Patents

Description

The present invention relates to a bag feeding device applied to a rotary bag filling and packaging machine having a plurality of pairs of intermittently rotating grippers, and in particular, an empty bag magazine device does not directly face a pair of grippers stopped at an empty bag feeding position. The present invention relates to a bag supply device applied in some cases.

Patent Document 1 describes a bag supply device applied to a rotary type bag packing and packaging machine including a plurality of pairs of intermittently rotating grippers. This bag supply device (hereinafter, the numbers and symbols in parentheses are those described in Patent Document 1), an empty bag magazine device (A) that stores a large number of empty bags, and stops at an empty bag supply position. The empty bags picked up one by one from the empty bag magazine device (A) by the suction cup (B) are arranged between the pair of grippers, and are directed to the pair of grippers stopped at the empty bag supply position. In the process of transferring, the empty bag is changed from a substantially horizontal posture to a substantially vertical posture and delivered to the pair of grippers.

The bag supply device described in Patent Document 1 is horizontally installed on a support member (4), a holding member (2) installed at one end of the support member (4), and a fixed frame (7), and driven. A shaft part (9) which is connected to a power source and reciprocally rotates, a swing arm (3) which is fixed to the shaft part (9) and swings within a predetermined angle range (θ1) in a vertical plane, and a support member (4). ) Is connected to the fixed frame (7) with a connecting rod (5). The support member (4) is rotatably attached to the end of the swing arm (3) at its intermediate portion, and its rotation axis is horizontal and perpendicular to the vertical plane. The support member (4) is provided with a drive mechanism (including an air cylinder that is a drive source) for opening and closing the holding member (2).

In the bag supply device described in Patent Document 1, with the swing of the swing arm (3), a receiving position (a position where the holding member (2) receives an empty bag from the suction cup (B)) and a delivery position (a holding member). (2) reciprocates between a pair of grippers stopped at the empty bag supply position and a position where the empty bag is delivered. Since the other end of the supporting member (4) is connected to the fixed frame (7) by the connecting rod (5), the holding member (2) moves from the receiving position to the delivery position in the holding member (2). 2) swivels around the rotation axis, and the sandwiching surface of the sandwiching member (2) and the empty bag are converted from a substantially horizontal posture to a substantially vertical posture. Since the support member (4) is directly attached to the swing arm (3) swinging in the vertical plane, and its rotation axis is horizontal and vertical to the vertical plane, the holding member (2) and the empty bag are The center line passing through the center in the width direction moves substantially within one vertical plane.

In Patent Document 1, the pair of grippers stopped at the empty bag supply position are symmetrically arranged with respect to one vertical plane (hereinafter, this vertical plane is referred to as a symmetry plane), and the empty bag has its center in the width direction. The center line is stored in the empty bag magazine device so that the passing center line is located in the symmetry plane, and the center line is substantially in the symmetry plane even while being transferred from the receiving position to the delivery position by the bag feeding device. Located inside. When the pair of grippers stopped at the empty bag supply position and the empty bag magazine device are arranged in the above relationship with respect to the plane of symmetry, in the present invention, the empty bag magazine device (and the empty bag) is It is said to "face" the pair of grippers stopped at the bag feeding position.
The bag supply device described in Patent Document 1 is applied when the empty bag magazine device (and the empty bag) faces the pair of grippers stopped at the empty bag supply position.

On the other hand, for the convenience of the layout of the rotary bag filling and packaging machine and the compactness of the rotary bag filling and packaging machine, the empty bag magazine device should be directly opposed to the pair of grippers stopped at the empty bag supply position. May not be possible. In this case, the symmetry planes of the pair of grippers stopped at the empty bag supply position and the vertical plane including the center line passing through the center of the empty bag stored in the empty bag magazine device in the widthwise direction have a predetermined angle (see FIG. 1). Intersect at the indicated angle θ). Then, as is clear from FIG. 1, the width direction of the empty bag is not perpendicular to the plane of symmetry.
When the empty bag magazine device is not directly facing the pair of grippers stopped at the empty bag supply position, the empty bag taken out from the empty bag magazine device is transferred from the receiving position to the delivery position while the empty bag is being transferred. Face the pair of grippers stopped at the supply position (the center of the empty bag in the width direction is located on the symmetry plane of the pair of grippers, and the width direction of the empty bag is perpendicular to the symmetry plane) There is a need.

Patent Document 2 describes a bag supply device applied when the empty bag magazine device is not directly facing the pair of grippers stopped at the empty bag supply position.
The bag supply device described in Patent Document 2 (hereinafter, the numbers and symbols in parentheses are those described in Patent Document 2) has a suction arm (15) at the tip and swings up and down. (14) and a holder (40) having a pair of sandwiching pieces (45) and moving in a horizontal plane. As shown in FIG. 10 of Patent Document 2, when the tip of the empty bag positioned at a predetermined position in the empty bag magazine device (6) is sucked and lifted by the suction cup (8) (delivery position (x)), The empty bag is adsorbed by the suction cup (15), then the swivel arm (14) swivels upward to move the empty bag to the relay position (y), and in the process, is converted into a substantially vertical posture. The empty bag is delivered from the suction cup (8) to the sandwiching piece pair (45) at this relay position (y) (at this point, the empty bag is fed to the pair of grippers (g, g) of the bag packing machine). (See FIG. 8 of Patent Document 2)), then the holder (40) and the sandwiching piece pair (45) swivel in the horizontal plane, and the empty bag moves to the bag transfer destination (z). The pair of grippers (g, g) of the bag filling and packaging machine are directly faced, and then both edges are gripped by the grippers (g, g).

The bag supply device described in Patent Document 2 includes a mechanism for converting the bag from a substantially horizontal posture to a substantially vertical posture (swivel arm (14), suction cup (15), etc.), and a pair of grippers for moving the bag in a horizontal plane. Mechanisms (holder (40), pair of sandwiching pieces (45), etc.) for directly facing (g, g) are provided separately, and the transfer of empty bags by both mechanisms is the transfer position (x) → relay Since it is performed from the position (y) to the bag transfer destination (z), it is difficult to increase the transfer efficiency of empty bags (productivity of the bag packaging machine). Then, at the relay position (y), since the bag is delivered (delivery between the suction cup (15) and the sandwiching piece pair (45)) between the two mechanisms, an empty bag delivery error or misalignment occurs. High risk of occurring. Further, both mechanisms require independent drive sources, and the structure of the bag feeding device is complicated as a whole.

The bag feeding device described in Patent Document 3 (hereinafter, the numbers and symbols in parentheses are those described in Patent Document 3) as well as the bag feeding device described in Patent Document 2 are empty bags. A mechanism (first carrying device 50) for converting the bag taken out from the magazine device (14) from a substantially horizontal posture to a substantially vertical posture, and a pair of grippers that are swung in a horizontal plane and stopped at an empty bag supply position ( 13 and 13) are separately provided with a mechanism (second carrying device 60) for directly facing each other, and empty bags are transferred between the two mechanisms (first clamp (45) and second clamp (61)). However, it has the same problem as the bag supply device described in Patent Document 2.

Japanese Patent Publication No. 7-5125 Japanese Patent No. 5044844 Utility model registration No. 3123709

The present invention relates to a bag supply device for delivering an empty bag received from the empty bag magazine device to the pair of grippers when the empty bag magazine device is not directly facing the pair of grippers stopped at the empty bag supply position. In view of the improvement, it is an object of the present invention to provide a bag supply device that does not require empty bag delivery on the way and has a structure that is less complicated than the conventional device.

The bag supply device according to the present invention is used in a rotary bag filling and packaging machine having a plurality of pairs of intermittently rotating grippers, and stops at an empty bag magazine device that stores a large number of empty bags and an empty bag supply position. It is arranged between a pair of grippers, receives empty bags one by one from the empty bag magazine device, transfers them to the pair of grippers stopped at the empty bag supply position, and takes a vertical posture during the transfer process. It is converted and delivered to the pair of grippers. This bag supply device includes an empty bag holding member capable of holding or releasing the empty bag, a receiving position for receiving the empty bag holding member, and a delivery position for delivering the empty bag to the pair of grippers. And a reciprocating mechanism that reciprocates between the empty bag holding member and the empty bag holding member that is swung around a first axis that is parallel to the bag width direction in accordance with the operation of the reciprocating moving mechanism. A first swivel mechanism for vertically directing a holding surface; and an empty bag held by the empty bag holding member at the delivery position by turning the empty bag holding member around a second axis parallel to the bag length direction. A second turning mechanism is provided to directly face the pair of grippers stopped at the empty bag supply position.
In the bag supply device, the bag width direction of the empty bag holding member means the width direction of the empty bag held by the empty bag holding member, and the bag length direction of the empty bag holding member is the empty bag. It means the length direction of the bag held by the holding member.

In a preferred embodiment of the bag supply device, the empty bag holding member is composed of a pair of holding members that can be opened and closed, is installed at one end of a support member, and a drive mechanism that causes the support member to open and close the pair of holding members. The reciprocating mechanism reciprocates the empty bag holding member between the receiving position and the delivering position via the supporting member, and the first turning mechanism moves the supporting member to the first shaft. And the second swivel mechanism swivels the support member around the second axis.

A preferred embodiment of each component (reciprocating mechanism, first turning mechanism, second turning mechanism) of the bag supply device will be described below.
The reciprocating mechanism is a fixed frame installed on the machine base of the rotary bag filling and packaging machine, a shaft portion that is rotatably supported horizontally by the fixed frame, and is connected to a drive mechanism to reciprocally rotate. The swing arm is fixed to the shaft portion and swings in a vertical plane.
The first turning mechanism includes a first connecting rod that connects the other end of the supporting member to the fixed frame. The first turning mechanism does not have its own drive source and operates in accordance with the operation of the reciprocating mechanism (operates by the drive source of the reciprocating mechanism). The connecting portions at both ends of the first connecting rod have the aligning property (the inclination of the rotating shaft is allowed).

The second turning mechanism does not have its own driving source (similarly to the first turning mechanism, it operates in accordance with the operation of the reciprocating mechanism), and has its own driving source (air cylinder). There is.
In the former case, the second swivel mechanism is rotatably installed at an end of the swing arm, and a rotation piece whose rotation axis is parallel to the vertical plane, and a base rotated to an intermediate part of the swing arm. A bifurcated arm that is freely attached and has its rotation axis perpendicular to the vertical plane, a second connecting rod that connects one end of the bifurcated arm to the fixed frame, and the other end of the bifurcated arm. Is connected to the rotating piece, and a middle portion of the supporting member is rotatably attached to the rotating piece. The connecting portions at both ends of the third connecting rod have an aligning property.
In the latter case, in the second turning mechanism, the air cylinder is connected to one end of the bifurcated arm instead of the second connecting rod. The second swivel mechanism swivels the support member around the second axis by operating the air cylinder (expanding and contracting the piston rod).

It should be noted that the terms vertical, horizontal, vertical, and parallel in the present invention should not be understood as being limited to a mathematically or physically strict meaning, and are substantially vertical and substantially horizontal within a range that does not impair the essence of the invention. , Approximately vertical, and approximately parallel ranges are included. The same applies to other terms.

In the bag supply device, when the empty bag holding member reciprocates between the receiving position and the delivery position by the operation of the reciprocating mechanism, the first turning mechanism moves the support member (and the empty bag holding member) to The second swivel mechanism swivels about the first axis, and swivels the support member (and the empty bag holding member) around the second axis. The first swivel mechanism swivels the support member (and the empty bag holding member) around the first axis, so that the holding surface of the empty bag holding member changes from the horizontal or inclined state at the receiving position to the above-mentioned state. The empty bag changed to the vertical state at the delivery position and held by the empty bag holding member is changed from a horizontal or inclined posture to a vertical posture. Further, the second swivel mechanism swivels the support member (and the empty bag holding member) around the second axis, so that the empty bag held by the empty bag holding member at the delivery position is It is possible to directly face the pair of grippers stopped at the empty bag supply position. That is, in the delivery position, the width direction of the empty bag is perpendicular to the plane of symmetry of the pair of grippers (the vertical plane when the pair of grippers are symmetrically arranged with respect to one vertical plane), and The center of the empty bag in the width direction is located on the plane of symmetry.

According to the bag supply device of the present invention, the empty bag received by the empty bag holding member from the empty bag magazine is delivered directly (without delivery during transfer) to the pair of grippers by the empty bag holding member. .. Unlike the bag feeders described in Patent Documents 2 and 3, since there is no transfer during transfer, it is possible to increase the transfer efficiency of empty bags (productivity of a bag packaging machine). In addition, since there is no delivery during the transfer, the risk of delivery error or displacement of the empty bag can be avoided, and the bag supply device is simplified as a whole.
Further, when the second turning mechanism operates in accordance with the operation of the reciprocating mechanism (when it does not have its own drive source), since the first and second turning mechanisms do not have independent drive sources, The structure of the bag supply device is further simplified and the cost is reduced.

It is a top view of the bag supply device concerning the present invention. It is a side view of the bag supply apparatus shown in FIG. It is a front sectional view of the bag supply device shown in FIG. FIG. 4 is a sectional view taken along the line AA of FIG. 3. It is a side view of another bag supply device concerning the present invention. It is a front sectional view of the bag supply device shown in FIG. FIG. 6 is a sectional view taken along the line AA of FIG. 5.

Hereinafter, the bag supply device according to the present invention will be specifically described with reference to FIGS.
First, the bag supply device shown in FIGS. 1 to 4 will be described.
In FIG. 1, 1 is a rotary type bag filling and packaging machine (a part), and 2 is a part of an empty bag magazine device.
The rotary bag filling and packaging machine 1 includes a plurality of pairs of grippers 4 and 4 arranged at equal intervals around a table 3 that rotates intermittently. In the rotary bag filling and packaging machine 1, when the grippers 4 and 4 are stopped at the empty bag supply position (positions shown in FIGS. 1 and 2), the bags (empty bags) B are transferred one by one by the bag supply device 7 described later. The grippers 4 and 4 are supplied to the holding portions 4a and 4a. Then, as the table 3 (grippers 4 and 4) rotates intermittently, the bag B is hung in a vertical posture with both edges of the grippers 4 and 4 being clamped in a vertical posture. After each packaging process such as filling of the object to be packaged and sealing of the bag mouth is sequentially performed, the sandwiching portions 4a, 4a are opened and the product bag B is released from the grippers 4 and 4 and carried out of the machine. It

As shown in FIG. 1, the empty bag magazine device 2 does not directly face the pair of grippers 4 and 4 stopped at the empty bag supply position but is inclined at an angle θ. That is, the symmetry plane (vertical plane) 5 of the grippers 4, 4 and the vertical plane 6 including the center line passing through the widthwise center of the bags B stored in the empty bag magazine device 2 intersect at an angle θ. The empty bag magazine device 2 is a device for storing a large number of empty bags. For example, as described in Patent Document 1, a type in which a large number of bags are vertically stacked and stored, and for example, Patent Document 2 ( Alternatively, as described in JP-A-2014-999, etc.), a large number of bags are stacked in a form in which upper bags are displaced forward and conveyed forward, and the uppermost empty bag is separated to There may be a type (so-called conveyor magazine type bag feeder) in which the sheets are fast forwarded one by one and positioned in a substantially horizontal posture.

As shown in FIG. 1, the bag supply device 7 is disposed between the empty bag magazine device 2 and a pair of grippers 4 and 4 that stop at the empty bag supply position, and is substantially horizontal from the empty bag magazine device 2. The empty bags B are received one by one and transferred to the pair of grippers 4 and 4, and the empty bags B are placed in a substantially vertical posture and delivered to the pair of grippers.
The bag supply device 7 is installed on the support member 8, an empty bag holding member 9 that is installed at one end (the right end in FIG. 2) of the support member 8 and that can hold or release the empty bag B, and the support member 8. It includes a drive mechanism 10 for opening and closing the holding portions (fixed holding portion 9a, movable holding portion 9b) of the empty bag holding member 9. The fixed holding portion 9 a is fixed to the support member 8. The drive mechanism 10 includes an air cylinder 11 as a drive source and an arm 12 rotatably installed on the support member 8. A movable holding portion 9b is installed on one end of the arm 12 and an air cylinder is installed on the other end of the arm 12. The tip of the piston rod 11a of 11 is attached.

The bag supply device 7 includes a reciprocating mechanism 13, a first swivel mechanism 14, and a second swivel mechanism 15, which will be described later. The reciprocating mechanism 13 and the first turning mechanism 14 have essentially the same structure as the mechanism described in Patent Document 1.
The reciprocating mechanism 13 stops the empty bag holding member 9 via the support member 8 (the position for receiving the bag B from the empty bag magazine device 2) and the delivery position (the bag B is stopped at the empty bag supply position). It is reciprocated between the grippers 4 and 4).
The reciprocating mechanism 13 is supported by a fixed frame 16 installed on a machine base (not shown) of the rotary bag filling and packaging machine 1 and horizontally rotatably supported by the fixed frame 16 and connected to a drive mechanism 17 to reciprocate. The rotating shaft 18 and a swing arm 19 having one end fixed to the shaft 18 and swinging in a vertical plane are provided. When the swing arm 19 swings, the support member 8 (and the empty bag holding member 9) moves between the upper advance position (solid line position) and the lower retract position (two-dot chain line position) shown in FIG. To do. As shown in FIG. 3, the drive mechanism 17 includes a drive source such as a cam (not shown), a drive rod 21 that is connected to the drive source and moves up and down, and is integrated with a shaft portion 18 and is connected to a tip of the drive rod 21. Drive arm 22.

The first turning mechanism 14 includes a first connecting rod 23, both ends of which are rotatably connected to the other end (the left end in FIG. 2) of the support member 8 and the fixed frame 16 (the connecting frame 16a). Since the movement of the other end of the support member 8 is restricted by the first connecting rod 23, the reciprocating mechanism 13 operates and the swing arm 19 swings, so that the support member 8 (and the empty bag holding member 9) moves. When moving, the support member 8 (and the empty bag holding member 9) revolves around a first axis O ₁ described later. As shown in FIG. 2, when the support member 8 (and the empty bag holding member 9) reaches the upper advance position (position indicated by the solid line), the holding surface of the empty bag holding member 9 (holding portions 9a, 9b) is vertically oriented. When it comes to the downward retreat position (the position indicated by the chain double-dashed line) shown in FIG. The first connecting rod 23 has rod ends 23a and 23b having an aligning property (allowing the tilt of the rotating shaft) at both ends, and is fixed to the other end of the support member 8 via the rod ends 23a and 23b. It is connected to the frame 16 (connection frame 16a).

The swing arm 19 has a pair of supporting portions 19a and 19b extending in parallel with the shaft portion 18 at the end portion thereof, and the shaft portion 24a of the rotating piece 24 is rotatably supported by the supporting portions 19a and 19b. The rotation axis of the shaft portion 24a is the second axis O _{2 in} the present invention (see FIGS. 1 and 3) and is always parallel to the bag length direction of the empty bag holding member 9 (see arrow b in FIG. 3). A shaft portion 24b projects from the side surface of the rotating piece 24 perpendicularly to the shaft portion 24a, and the support member 8 is rotatably supported by the shaft portion 24a at an intermediate portion in the longitudinal direction thereof. The rotation axis of the support member 8 (center of the shaft portion 24b) is the first axis O ₁ (see FIGS. 2 and 3) in the present invention, and the bag width direction of the empty bag holding member 9 (see arrow a in FIG. 3). ) Is always parallel to.

In the second turning mechanism 15, the rotating piece 24 and a base portion (shaft portion 25) are rotatably attached to an intermediate portion in the longitudinal direction of the swing arm 19, and a rotating shaft of the shaft portion 25 has the vertical plane (swing arm 19). A bifurcated arm 26 that is perpendicular to the surface of the bifurcated arm 26, and a second connecting rod 27 whose both ends are rotatably connected to one end 26a of the bifurcated arm 26 and the fixed frame 16 (the connecting frame 16b). A third connecting rod 28, both ends of which are rotatably connected to the other end 26b of the forked arm 26 and the rotating piece 24 (opposite side of the shaft portion 24b). The rotation center of the connecting portion between the second connecting rod 27 and the connecting frame 16b is displaced from the swing center of the swing arm 19 (rotating shaft of the shaft portion 18) by a predetermined distance as shown in FIGS. Therefore, when the reciprocating mechanism 13 operates and the swing arm 19 swings, the bifurcated arm 26 connected to the second connecting rod 27 rotates (swings about the shaft portion 25), and the third connecting rod 28. The rotation piece 24 rotates about the second axis O ₂ via the, and the support member 8 (and the empty bag holding member 9) swivels about the second axis O ₂ accordingly. The third connecting rod 28 has rod ends 28a and 28b having an aligning property (allowing the inclination of the rotating shaft) at both ends, and the rotating piece 24 and the bifurcated arm 26 are connected via the rod ends 28a and 28b. It is connected to the end portion 26b.

Next, the overall operation of the bag supply device 7 will be described in time series.
(1) As shown in FIG. 2, the uppermost empty bag B among the large number of empty bags stored in the empty bag magazine device 2 is adsorbed to the suction cup 29 of the bag take-out device (see FIG. 2). Can be lifted up.
(2) The swing arm 19 swings backward (swings toward the empty bag magazine device 2 side), and the support member 8 comes to the downward retracted position as shown by the two-dot chain line in FIGS. Then, the empty bag holding member 9 reaches the receiving position. At this time, the empty bag holding member 9 is inclined almost horizontally (the inclination angle thereof is substantially the same as the inclination angle of the bag B lifted by the suction cup 29), and the bag width direction thereof is parallel to the width direction of the empty bag B. .. The holding portions (fixed holding portion 9a, movable holding portion 9b) of the empty bag holding member 9 are open at this point, and the tip of the bag B lifted upward by the suction cup 29 on the bag mouth side of the holding portions 9a, 9b. Enter Then, the air cylinder 11 is operated, the holding portions 9a and 9b of the empty bag holding member 9 are closed, and the bag B is held. At this point, the empty bag B held by the empty bag holding member 9 does not directly face the pair of grippers 4 and 4 that stop at the empty bag supply position.

(3) When the swing arm 19 swings forward (swings toward the empty bag supply position where the pair of grippers 4 and 4 stop), the support member 8 moves toward the upward forward position, which causes the empty space. The bag holding member 9 moves from the receiving position to the delivery position. In the process of the movement, the first and second turning mechanisms 14 and 15 operate, and the support member 8 (and the empty bag holding member 9) turns about the first axis O ₁ and the second axis O ₂ .
(4) Before the empty bag holding member 9 reaches the delivery position, the pair of grippers 4, 4 stop at the empty bag supply position. At this point, the gripping portions 4a, 4a of the grippers 4, 4 are open.

(5) When the support member 8 reaches the upper advance position and becomes substantially horizontal and the empty bag holding member 9 reaches the delivery position, as shown by the solid lines in FIGS. The width direction (and the width direction of the bag B held by the empty bag holding member 9) is horizontal, the bag length direction of the empty bag holding member 9 is vertical, and the bag B is in a vertical posture. The center of direction is located in the plane of symmetry 5. That is, at this point, the empty bag B held by the empty bag holding member 9 faces the grippers 4, 4. After the empty bag holding member 9 reaches the delivery position, the grippers 4 and 4 are closed, the upper portions of both edges of the empty bag B are sandwiched, and then the air cylinder 11 is operated in reverse to open the empty bag holding member 9. , Release empty bag B.

Next, the bag supply device 31 shown in FIGS. FIG. 1 can be referred to for the plan view of the bag supply device 31. 5 to 7, parts that are substantially the same as the parts of the bag supply device 7 shown in FIGS. 1 to 4 are given the same numbers.
The bag supply device 31 is different from the bag supply device 7 in that an air cylinder 32 is connected to one end 26a of the forked arm 26 as a drive source of the second swivel mechanism 15, and is different in other points. Same as 7.

The rear end of the air cylinder 32 is connected to the connecting frame 16b via the rod end 33, one end of the connecting rod 34 is connected to the tip of the piston rod 32a, and the other end of the connecting rod 34 is one of the bifurcated arms 26. It is connected to the end portion 26 a via a rod end 35. The rotation center of the connecting portion between the air cylinder 32 and the connecting frame 16b (the rotation center of the rod end 33) coincides with the rotation center of the swing arm 19 (the rotation axis of the shaft portion 18). Therefore, in the second swivel mechanism 15 of the bag supply device 31, the bifurcated arm 26 does not rotate even if the reciprocating mechanism 13 operates (the swing arm 19 swings), and the air cylinder 32 operates (piston rod 32a). When the bifurcated arm 26 rotates, the support member 8 (and the empty bag holding member 9) swivels around the second axis O ₂ .
Note that it is not essential to connect the rod end 33 to the connecting frame 16b, and it is also possible to connect the rod end 33 to the end of the shaft portion 18.

Next, the operation of the bag supply device 31 will be briefly described mainly focusing on the operation of the air cylinder 32.
The swing arm 19 swings backward (swings toward the empty bag magazine device 2 side), and the support member 8 comes to the downward retracted position as shown by the two-dot chain line in FIGS. When the bag holding member 9 reaches the receiving position, the empty bag holding member 9 is inclined almost horizontally. At this time, the piston rod 32a of the air cylinder 32 is extended, and the bag width direction of the empty bag holding member 9 is parallel to the width direction of the empty bag B.

When the swing arm 19 swings forward (swings to the side of the empty bag supply position where the pair of grippers 4 and 4 stop), the support member 8 moves toward the upper forward position, whereby the empty bag holding member. 9 moves from the receiving position to the delivery position. In the process of the movement, the first turning mechanism 14 operates, and the support member 8 (and the empty bag holding member 9) turns about the first axis O ₁ . At the same time, the air cylinder 32 operates and the piston rod 32a contracts, whereby the second turning mechanism 15 operates and the support member 8 (and the empty bag holding member 9) turns about the second axis O _2. ..

When the support member 8 reaches the upper advance position and becomes substantially horizontal and the empty bag holding member 9 reaches the delivery position, as shown by the solid line in FIGS. And the width direction of the bag B held by the empty bag holding member 9 is horizontal, the bag length direction of the empty bag holding member 9 is vertical, and the bag B is in a vertical posture. Located in the plane of symmetry 5. That is, at this point, the empty bag B held by the empty bag holding member 9 faces the grippers 4, 4.

1 Rotary bag filling and packaging machine 2 Empty bag magazine device 4 Gripper 5 Symmetrical plane (vertical plane) of a pair of grippers 4 and 4 stopped at empty bag supply position
6 Vertical plane including the center line passing through the center in the width direction of the bags stored in the empty bag magazine device 7, 31 Bag feeding device 8 Support member 9 Empty bag holding member 13 Reciprocating mechanism 14 First turning mechanism 15 Second turning mechanism 16 Fixed frame 19 Swing arm 23 First connecting rod 24 Rotating piece 26 Bifurcated arm 27 Second connecting rod 28 Third connecting rod 32 Air cylinder B bag (empty bag)
O ₁ first axis (rotating axis of support member)
O ₂ 2nd axis (rotating axis of rotating piece)

Claims (5)

A bag feeding device used in a rotary bag filling and packaging machine having a plurality of pairs of intermittently rotating grippers, and between a blank bag magazine device that stores a large number of blank bags and a pair of grippers that stop at a blank bag feeding position. The empty bags are placed one by one and received from the empty bag magazine device one by one, and are transferred to the pair of grippers stopped at the empty bag supply position. An empty bag holding member capable of holding or releasing the empty bag, a receiving position for receiving the empty bag holding member and the empty bag, and a delivery for transferring the empty bag to the pair of grippers. A reciprocating mechanism that reciprocates between the positions, and the empty bag holding member is swung around a first axis parallel to the bag width direction according to the operation of the reciprocating mechanism, and the empty bag holding member is held at the delivery position. A first swivel mechanism in which a holding surface of the member is oriented vertically, and an empty bag holding member which turns the empty bag holding member around a second axis parallel to the bag length direction and is held by the empty bag holding member in the delivery position. A second swivel mechanism for directly facing the pair of grippers stopped at the empty bag supply position, and the empty bag holding member includes a pair of openable and closable holding members, and is installed at one end of a support member. A drive mechanism for opening and closing the pair of sandwiching members is installed on a support member, and the reciprocating mechanism reciprocates the empty bag holding member between the receiving position and the delivering position via the support member, first turning mechanism, said support member to pivot about said first axis, said second pivot mechanism bag supply, characterized in der Rukoto that pivoting the support member about said second axis apparatus. The bag feeding device according to claim 1 , wherein the second turning mechanism turns the support member around the second axis in accordance with the operation of the reciprocating mechanism. The reciprocating mechanism, a fixed frame installed on the machine base of the rotary bag filling and packaging machine, a shaft portion that is rotatably supported horizontally on the fixed frame, is connected to a drive mechanism, and reciprocally rotates. A first swing mechanism that includes a swing arm that is fixed to the shaft portion and swings in a vertical plane; and the first swing mechanism includes a first connecting rod that connects the other end of the support member to the fixed frame. A connecting portion at both ends of the rod has an aligning property, the second turning mechanism is rotatably installed at an end portion of the swing arm, and a rotation piece whose rotation axis is parallel to the vertical plane, and a base portion. Is rotatably attached to an intermediate portion of the swing arm, and its rotation axis is perpendicular to the vertical plane, and a second connecting rod that connects one end of the forked arm to the fixed frame. A third connecting rod that connects the other end of the bifurcated arm to the rotating piece, the connecting portions at both ends of the third connecting rod are aligned, and the intermediate portion of the support member is the rotating piece. The bag feeding device according to claim 2 , wherein the bag feeding device is rotatably attached to the bag. The bag supply device according to claim 1 , wherein the second turning mechanism includes an air cylinder as a drive source, and the support member is turned about the second axis by the operation of the air cylinder. The reciprocating mechanism, a fixed frame installed on the machine base of the rotary bag filling and packaging machine, a shaft portion that is rotatably supported horizontally on the fixed frame, is connected to a drive mechanism, and reciprocally rotates. A first swing mechanism that includes a swing arm that is fixed to the shaft portion and swings in a vertical plane; and the first swing mechanism includes a first connecting rod that connects the other end of the support member to the fixed frame. A connecting portion at both ends of the rod has an aligning property, the second turning mechanism is rotatably installed at an end portion of the swing arm, and a rotation piece whose rotation axis is parallel to the vertical plane, and a base portion. Is rotatably attached to an intermediate portion of the swing arm, and has a bifurcated arm whose rotation axis is perpendicular to the vertical plane, the air cylinder connected to one end of the bifurcated arm, and the bifurcated arm. A third connecting rod for connecting the other end of the third connecting rod to the rotating piece, the connecting portions at both ends of the third connecting rod are aligned, and the intermediate portion of the supporting member is rotatable with respect to the rotating piece. The bag supply device according to claim 4 , wherein the bag supply device is attached.

Images