JP5918942B2 - Rotary packaging machine - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a rotary packaging machine that manufactures a gusset bag that is bound to a sealed bag mouth and opened in a fan shape, and more specifically, for example, when delivering a gusset bag from a bag supply conveyor to a rotary packaging machine. The present invention relates to a rotary packaging machine that seals after opening both sides of a gusset bag folded inward with a spatula.

The gusset bag is a bag body in which both sides of the front and back sheets made of synthetic resin are folded inward to form ridges and the bottom is sealed. Since the gusset bag is bent inward on both sides to form ridges, four sheets overlap on both sides in the bag mouth, and usually the four sheets are stacked and heat sealed. However, when the bag mouth is squeezed and tied with a string or the like to open the bag mouth in a fan shape, the heat-sealed gusset bag cannot be opened neatly even if the bag mouth is squeezed.

  In Patent Document 1, when the bag mouth of the gusset bag is squeezed and tied with a string or the like, both sides folded inside the bag mouth of the gusset bag are extended in the horizontal direction, and heat sealing is performed with the front and back sheets being combined. A packaging machine is disclosed.

  The packaging machine of Patent Document 1 is a so-called rotary type packaging machine, which is a gusset bag supply process, a printing process, a process for opening a gusset bag, gripping two bag sheets on both sides, and re-squeezing with a nail, gusset bag The opening process, filling process, vibration process that applies vibration to the gusset bag and drops deposits etc. on the opening, inspection process, sealing process, sealing part cooling and non-defective product discharging process Complete the packaging.

In the gusset bag supply process, the gusset bags are supplied one by one from the bag box and passed to a gripping claw (clamp) attached to the tip of the grip arm (clamp arm). The gripping claw rotates and conveys the gusset bag to the printing mechanism in the next process while holding the four sheets on both sides of the gusset bag.

  Further, in the step of grasping the gusset bag and re-squeezing it with the claws, the front and back surfaces of the gusset bag are adsorbed and opened by a pair of adsorbents, and then the grasping claws release the gusset bag and are held by the adsorbent.

  In a gusset bag held by an adsorbent in an open state, a spatula that is narrowly closed is lowered by a lifting mechanism and inserted to expand, and the ridges that are folded inward on both sides of the gusset bag are extended laterally.

Further, the adsorbent that has adsorbed the sheet from the front and back releases the suction and starts separation, and the gripping claw starts a re-gripping operation on both ends of the gusset bag. The gripping claw grips only the sheet of the bag mouth in order to pinch the location of the notch formed in the spatula. For this reason, the spatula is closed in a narrow state without being obstructed by the gripping claws, and moves out of the bag mouth of the gusset bag.

And when this state is maintained and the gusset bag is opened in the opening process, the filling is filled in the filling process, the vibration is performed, and the opening is heat sealed, and the two sheets are heat sealed. It becomes. As a result, the bag mouth of the gusset bag is in a state where the ridge portion is opened.

JP-A-11-49116 JP-A-61-2232129 Japanese Utility Model Publication No. 60-105305 Japanese Utility Model Publication No. 1-91709

However, in the packaging machine of Patent Document 1, in order to expand and seal the ridge portion of the bag mouth, in one step of the rotary type packaging machine, the spatula is inserted into the bag mouth to expand it, Since a process of grasping the sheet and re-gripping it with the claws is required, the packaging speed of the rotary packaging machine cannot be increased, and the packaging efficiency is poor.

The present invention is not a single step of the rotary packaging machine, for example, in the process of delivering the gusset bag from the bag supply conveyor to the packaging machine, by passing the ridge of the bag mouth laterally with a spatula and delivering it to the packaging machine, An object of the present invention is to provide a rotary type packaging machine capable of increasing the packaging efficiency.

The rotary packaging machine of the present invention includes a plurality of clamp arms on the outer periphery of the rotor, and a clamp is attached to the tip of the clamp arm, and the gusset bag delivered from the bag feeding mechanism is gripped by the clamp while rotating intermittently. A rotary type packaging machine that fills a package and seals a bag mouth, wherein the bag feeding mechanism is a bag feeding mechanism that feeds a gusset bag, and a gusset bag is taken out from the bag feeding mechanism to open the bag mouth. A bag opening mechanism, a pair of spatulas inserted into the bag opening of the gusset bag opened by the bag opening mechanism, and a ridge portion of the bag opening is expanded laterally. a transfer mechanism for transferring the clamping of the rotary type packaging machine pinched with clips upper open the gusset bag, is composed of a front holding unit and the rear hold-down unit, Soo clamping the gusset bag in the clamp Before, characterized in that and a pressing mechanism for pressing the edge portion of the gusset bag which is expanded laterally and the receiving plate of the holding plate and behind the pressing unit of the front pressing unit.

The bag supply mechanism is a mechanism for supplying gusset bags, and may be a bag box in which a large number of gusset bags are stacked and stored, or a conveyor belt type bag supply conveyor that conveys the gusset bags with a string-like conveyor belt. .

The bag opening mechanism may be composed of two components, a bag removing mechanism and a bag passing mechanism as in the first embodiment, or may be configured as a single mechanism as in the second embodiment. (See Patent Literature 2 to Patent Literature 4). First, when the bag opening mechanism is composed of two components, the bag removing mechanism picks up and lifts the uppermost gusset bag loaded with the bag supply mechanism to the next bag passing mechanism. . The bag passing mechanism opens the bag mouth of the gusset bag lifted by the bag removing mechanism and holds it in a predetermined posture. This bag passing mechanism creates a gusseted bag posture so that the next expansion mechanism can easily expand the bag mouth.

The bag opening mechanism constituted by one mechanism is capable of rotating independently of the first suction arm that expands and contracts and rotates by sucking and holding one surface of the gusset bag, and the first suction arm. A first suction arm that sucks and holds the gusset bag is supported by a second suction arm that sucks the other surface opposite to the gusset bag surface sucked by the first suction arm. The second suction arm follows the suction arm and sucks the other surface, and at least one of the first and second arms contracts or extends to open the bag mouth.

The expansion mechanism expands the ridges on both sides of the bag mouth of the gusset bag supported by the bag opening mechanism, and transfers the ridge to the transfer mechanism. Due to the function of the expansion mechanism, the bag mouth is expanded in the process of delivering the gusset bag to the delivery mechanism, so that the packaging work can be made more efficient.

The delivery mechanism clamps the upper part of the gusset bag with the bag mouth expanded, and delivers it to the clamp of the rotary packaging machine. For this reason, the spatula inserted in the bag mouth can be pulled out upward in an expanded state.

In the supplying step of the gusset bag of the rotary type packaging machine main body, the Ayabe gusset bag which is expanded laterally, by providing a pressing mechanism for pressing in pressing plate prior to clamping by the clamp, the gusset bag for clamping the clamp Can prevent wrinkles on both sides.

  According to the present invention, in the process of delivering the gusset bag to the rotary type packaging machine, packaging efficiency can be improved by opening the ridge portion of the bag mouth laterally with a spatula and delivering it to the packaging machine.

Overall schematic plan view of rotary packaging machine Side view of bag supply conveyor and bag removal mechanism which is a kind of bag supply mechanism Side view of multiple mechanisms that deliver gusset bags to a rotary packaging machine Top view of bag delivery mechanism Front view showing the internal structure of the spreading mechanism Front view of the gusset bag spread with a spatula gripped by the clip mechanism Side view of delivery mechanism delivering gusset bag to rotary packaging machine Side view of holding mechanism Front view of holding mechanism Schematic side view of bag opening mechanism of embodiment 2

Example 1
Hereinafter, Example 1 will be described with reference to the drawings. FIG. 1 is a plan view of the entire rotary packaging machine. In this rotary type packaging machine, a bag supply mechanism 3 for supplying a gusset bag 2 in the gusset bag supply process is disposed adjacent to the rotary type packaging machine main body 1, and the bag mouth 4 of the gusset bag 2 sealed in the carry-out process. A binding machine 5 is arranged that folds the fan into a fan shape and binds it with a string or the like. In the above-mentioned Patent Document 1, the gripping claws hold the four sheets on both sides of the gusset bag in a gripped state, but in the first embodiment, the gusset bag 2 has already been transferred from the bag supply mechanism 3 to the rotary packaging machine body 1. In the bag supply mechanism for delivering the bag, the ridge portion of the bag mouth is expanded laterally, and the clamp 6A of the rotary packaging machine body 1 grips the two sheets of the front and back sheets on both sides of the expanded bag mouth 4. It is out.

  The rotary packaging machine main body 1 has eight pairs of clamp arms 6 radially attached to the outer peripheral portion of the rotor 1A, and clamps 6A are attached to the tips of the clamp arms 6, which are normally springs (not shown). Therefore, the clamp 6A is closed. When the opening / closing body provided at the base end of the clamp arm 6 is pressed by a cam (both not shown), the clamp 6A is opened, and the cam is retracted when the gusset bag 2 comes to a predetermined position. The clamp 6A is closed by a spring to grip the gusset bag 2.

The rotary wrapping machine main body 1 includes a gusset bag supply step (1), a gusset bag opening step of (2) an opening suction cup 7 and an opening spatula 8 holding the opening. (3) A filling step for filling the filling material with the funnel-shaped cylinder 9; (4) a vibration step for adjusting the filling mode of the filling material by applying vibration from the bottom of the gusset bag 2 of (5); (6) Sponge plate 10 holds the gusseted bag 2 containing the package from the front and back to release air from the bag to reduce the volume, and (7) sealer 11 seals the bag mouth 4. After the sealing step and the unloading step of unloading the sealed gusset bag 2 in (8), the bag mouth 4 is folded into a fan shape by the bundling device 5 arranged adjacently and bound with a string or the like to complete the packaging. In FIG. 1, reference numeral 12 denotes a control box operated by an operation panel. Hereinafter, each component will be described.

(Bag supply mechanism)
FIG. 2 is a side view of a bag supply conveyor and a bag removing mechanism which are a kind of bag supply mechanism. The bag supply conveyor 3 has a plurality of pulleys 14 arranged on a long conveyor body 13, and a thin string-like rubber belt 16 is stretched around these pulleys 14 and a conveyance motor 15 arranged at the bottom of the body 13. Then, the rubber belt 16 stretched over the entire length of the conveyor main body 13 is slightly exposed from the upper surface of the conveyor main body 13, and the gusset bag 2 placed on the conveyor main body 13 is conveyed forward of the bag supply conveyor 3.

Further, an auxiliary belt 17 that pushes the gusset bag 2 positioned in front of the bag supply conveyor 3 forward is disposed above the conveyor body 13 so that the bag can be reliably adsorbed by the bag removing mechanism 21 of the bag opening mechanism. The gusset bag is continuously sent to the tip of the conveyor body 13. Note that whether or not the gusset bag 2 is reliably delivered to the tip is detected by the contact sensor 13A.

In the first embodiment, the gusset bag 2 is supplied by the bag supply conveyor 3, but the supply of the gusset bag 2 is not shown, but may be a well-known stacked bag box. . The bag box has a receiving plate for loading and lowering the gusseted bag 2 in a box made up of a bottom plate and side plates standing on both sides of the bottom plate, and a lifting bar is provided vertically below the receiving plate. Yes. A rack is engraved in a certain length range of this lifting rod, this rack meshes with the gear of the motor fixed to the equipment frame side, pushes up the backing plate, and always keeps the uppermost gusset bag at a certain level Hold on.

As shown in FIG. 3, the ridge portion of the bag mouth 4 of the gusset bag 2 is expanded between the bag supply conveyor 3 and the rotary packaging machine body 1, and the gusset bag 2 is attached to the rotary packaging machine body 1. A bag feeding mechanism comprising a plurality of mechanisms for supplying the bag is disposed. That is, a bag removing opening mechanism that sucks and lifts the gusset bag 2 from the bag supply conveyor 3 by a suction cup, opens the bag opening 4 and holds it vertically, and the bag opening of the gusset bag 2 held by the bag opening opening mechanism. 4 is configured with an expansion mechanism 23 that expands the ridges 4 and a delivery mechanism 24 that transfers the gusset bag whose bag mouth is expanded by the expansion mechanism 23 to the rotary packaging machine body 1.

Although it has been described that when the gusset bag 2 is delivered from the bag supply conveyor 3 to the expansion mechanism 23, the delivery is performed via the bag removal opening mechanism, in the first embodiment, this bag removal opening mechanism is a bag. It consists of two mechanisms, a take-off mechanism 21 and a bag passing mechanism 22. However, the bag opening mechanism may be a bag opening mechanism that functions as a single mechanism as will be described in Example 2 described later. Hereinafter, the bag removing mechanism 21 will be described in order.

(Bag removal mechanism)
The bag removing mechanism 21 has support bodies 27, 27 attached vertically to a bag removing arm 26 that rotates about a main shaft 25, and a through hole (not shown) formed in the support bodies 27, 27. The rod 28 is fitted, and the rod 28 is supported so as to be slidable along the bag take-up arm 26. Since the spring 29 is fitted between the support bodies 27 of the rod 28, the rod 28 is always urged upward.

A metal strip 30 is horizontally fixed to the lower end of the rod 28, and both end portions thereof are bent downward at a right angle, and two metal rods 31 are bridged vertically on both ends. Has been. A synthetic resin block 32 is fitted in the center of the two bars 31 and fixed with screws 33. Further, a pair of suction cups 34 are attached to the tip of the block 32.

A ring-shaped cam head 35 is attached to the upper end portion of the rod 28, and the rod 28 slides in the vertical direction along the bag take-up arm 26 by pressing the cam head 35 with the rod-shaped cam 36.

(Bag delivery mechanism)
As shown in FIG. 4, the bag passing mechanism 22 has a fixed suction cup unit 38 attached to the distal end portion of the bag passing arm 37, and further approaches the distal end portion of the fixed suction cup unit 38 to the fixed suction cup unit 38, A movable suction cup unit 39 is provided. The movable suction cup unit 39 approaches the fixed suction cup unit 38 and adsorbs the bag mouth 4 of the gusset bag 2, and the movable suction cup unit 39 is separated to open the bag mouth 4 of the gusset bag 2. The bag transfer arm 37 of the bag transfer mechanism 22 rotates about the rotation shaft 40 during a horizontal position where the bag transfer mechanism 21 receives the gusset bag 2 from the bag removal mechanism 21 and transfers it to the expansion mechanism 23.

The fixed suction cup unit 38 has a pair of fixed suction cups 42 arranged in parallel in the lateral direction at the distal end portion of a thick L-shaped base plate 41 fixed to the distal end portion of the bag passing arm 37. A tube elbow 43 connected to the fixed suction cup 42 is attached to the rear end of the base plate 41, and an air hose (not shown) is connected thereto.

As shown in FIG. 4, the movable suction cup unit 39 is provided with a pair of movable suction cups 45 provided on a pipe-like suction cup mounting base 44, and is supported at the distal end of a slide rod 46 slidably supported along a bag passing arm 37. Further, the movable suction cup 45 is disposed so as to face the fixed suction cup 38. The slide rod 46 is slidably supported by two rods fitted into a through hole of a support 47 fixed to the bag passing arm 37. A spring 48 is fitted on the tip of the slide rod 46, and the suction cup mounting base 44 is always urged in a direction away from the base plate 41.

A ring-shaped cam head 49 is attached to the rear end of the slide rod 46. As shown in FIG. 3, a rotating cam 51 attached to a camshaft 50 concentric with the rotating shaft 40 rotates in the clockwise direction, and the cam head 49 is pulled up against the urging force of a spring 48 to move the movable suction cup. 45 is close to the fixed suction cup 42. On the contrary, when the rotating cam 51 rotates counterclockwise, it moves away from the cam head 49, so that the slide rod 46 is pushed downward by the spring 48 and the movable suction cup 45 is separated from the fixed suction cup 42.

(Expansion mechanism)
Next, the expansion mechanism 23 will be described. FIG. 5 is a front view showing the internal structure of the spreading mechanism 23. A pair of racks 52 and 53, a pinion 54, and a pair of sliders 55 and 56 constituting the expansion mechanism 23 are housed in a casing 57. The casing 57 is attached to a support pole 58 standing on the side. It is supported. An elevating shaft 59 is fitted into the support pole 58, the elevating shaft 59 and the casing 57 are connected via a support rod 60, and the casing 57 moves up and down as the elevating shaft 59 moves up and down.

A pair of racks 52 and 53 held in the casing 57 by the sliders 55 and 56 mesh with the pinion 54 from above and below, and reciprocate by an operating rod 61 joined to the upper rack 52, so that the upper and lower racks 52 and 53 53 move in parallel in opposite directions, and the spats 62 and 63 open and close. The operating rod 61 is disposed on the upper portion of the casing 57, and one end is connected to the upper rack 52 as described above, and the other end is rotatably connected to the rotating shaft 64. The actuating rod 61 reciprocates by the rotation of the rotating shaft 64, and accordingly, the upper rack 52 reciprocates, and the lower rack 53 also reciprocates via the pinion 54.

The sliders 55 and 56 are slidably fitted into a rail body 66 provided horizontally at the lower part of the front wall 65 inside the casing 57. As shown in FIG. 5, the sliders 55 and 56 are connected to racks 52 and 53 that are arranged above the rail body 66 and move in the same direction.

As shown in FIG. 3, L-shaped fixing fittings 67 are attached to the sliders 55 and 56 so as to protrude forward from the casing 57, and the spats 62 and 63 are attached to the tip ends of the fixing fittings 67. ing. The spatula 62, 63 is a thin metal plate having a willow-like tip, and waits at an upper position of the bag mouth 4 of the gusset bag 2 when the bag passing mechanism 22 is held in a horizontal state. When the gusset bag 2 is held vertically by the bag passing mechanism 22, the spatula 62, 63 is lowered together with the casing 57, and the spatula 62, 63 is inserted into the bag mouth 4, and opens and closes in the left-right direction. The ridges on both sides of the bag 2 are expanded simultaneously.

(Delivery mechanism)
FIG. 6 is a front view showing a state in which the gusset bag spread by the spatula is gripped by the clip mechanism, and FIG. 7 is a side view showing a state in which the delivery mechanism delivers the gusset bag to the rotary packaging machine. The delivery mechanism 24 sandwiches the bag opening 4 of the gusset bag 2 that is expanded and held by the pair of spatulas 62 and 63 of the expansion mechanism 23 from above with a clip mechanism 68 and serves as a clamp arm of the rotary packaging machine 1. It works to move horizontally and deliver the gusset bag 2.

As shown in FIG. 7, in the delivery mechanism 24, a slide rail 71 is laid on the side wall of the extension 70 extending from one end of the rectangular parallelepiped box 69 in the direction of the rotary packaging machine 1, and along the slide rail 71. The long arm 72 reciprocates in the horizontal direction. The long arm 72 is a metal plate formed in a thick inverted L shape in a side view of FIG. 7, and has an upper portion of the inverted L shape, a surface facing the slide rail, and the slide rail 71. A sliding body 73 to be fitted is attached. Further, as shown in FIG. 6, the upper part of the rear end of the long arm 72 is bent at a right angle and connected to the rotating shaft 75 via the crank rod 74. The rotation shaft 75 is vertically supported by the other end portion (the end portion far from the extension portion 70) of the rectangular parallelepiped box 69, and is connected to the main drive shaft via a crank mechanism or the like (not shown). ing. The crank rod 74 connected to the rotating shaft 75 is supported by two rods. As described above, one end is supported on the rotating shaft 75 and the other end is supported on the upper rear end of the long rod 72. ing.

A clip mechanism 68 for grasping the gusset bag 2 is provided at the lower end of the long arm 72. In the clip mechanism 68, a clip 76 made of a pair of clip pieces opens and closes, and the gusset bag 2 held by the spats 62 and 63 of the spreading mechanism 23 is sandwiched from above. As shown in FIG. 6, the clip 76 sandwiches the upper center of the gusset bag 2 so that the spatula 62, 63 can be pulled out and moved upward while the spatula 62, 63 is removed. The clamp 6A of the clamp arm can sandwich the upper both sides of the bag mouth 4.

Each clip piece constituting the clip 76 is provided with a fan-shaped gear 77. When both gears 77 mesh with each other and rotate one, the other rotates in the opposite direction to pinch the bag mouth 4 of the gusset bag 2. The extension piece at the rear end of the rotation shaft of one fan-shaped gear 77 is connected to the air cylinder 78, and the force is transmitted to the clip piece by the expansion and contraction of the air cylinder 78, so that the clip 76 opens and closes.

(Holding mechanism)
As shown in FIG. 8, the edge of the bag mouth is widened with the spatula 62, 63, and the transfer mechanism 24 grips the upper center of the gusset bag 2 with the clip 76, so that the clamp 6 </ b> A of the clamp arm 6 is gripped. There are wrinkles in the position, and the ridge that has been expanded by the spatula swells to return. For this reason, the holding mechanism 79 holds the portion gripped by the clamp 6A, and then grips the gusset bag 2, thereby preventing wrinkles of the gusset bag 2 and eliminating the loss of gripping by the clamp 6A.

The pressing mechanism 79 includes a front pressing unit 80 and a rear pressing unit 81. In the front press unit 80, a driving support post 82 and a driven support post 83 are erected on both outer sides of the clamp 6A at the delivery position of the gusset bag 2, and rectangular press plates 84, 85 are provided at upper ends of the support posts 82, 83, respectively. The gusset bag 2 attached and gripped by the clip 76 is rotated between a position where the gusset bag 2 is pressed and a position away from the gusset bag 2.

The lower end of the drive column 82 is pivotally supported by the base 86 and is rotated by a main drive shaft (not shown). The drive column 82 and the driven column 83 are connected by a connecting rod 87. As the drive column 82 rotates, the driven column 83 rotates in the reverse direction, and the holding plates 84 and 85 are gusseted as described above. It rotates in the direction to hold 2 and away. Reference numeral 88 denotes a guide plate which guides the gusset bag 2 rotating from the delivery position (1) of the gusset bag 2 to the bag opening position (2) so as not to spread outward.

As shown in FIG. 8, the rear pressing unit 81 is arranged on the rear side of the gusset bag 2. The rear holding unit 81 is mounted with a T-shaped receiving plate 91 standing upright on a cylinder 90 attached to the upper portion of a mounting frame 89. The upper portion of the receiving plate 91 and the pair of holding plates 84 and 85 are connected to each other. It arrange | positions so that it may oppose.

(Function of configuration)
The operation of the above configuration will be described below.
As shown in FIG. 3, with the bag take-off arm 26 of the bag take-off mechanism 21 hanging down, the rod-like cam 36 pushes down the rod 28 while resisting the urging force of the spring 29, thereby The sucker 34 adsorbs the gusset bag 2 on the tip. When the suction cup 34 sucks the gusset bag 2, the rod-shaped cam 36 rotates in the direction of releasing the pressure, the rod 28 is lifted by the urging force of the spring 29, and the suction cup 34 sucks and lifts the gusset bag 2.

When the suction cup 34 lifts the gusset bag 2 and rotates about 30 degrees counterclockwise, the bag delivery mechanism 22 that has been waiting while the movable suction cup unit 39 is separated from the fixed suction cup unit 38 at the delivery position is provided with a rotating cam. 51, the slide rod 46 is pulled up through the cam head 49, the movable suction cup unit 39 is brought close to the fixed suction cup unit 38, and the bag mouth 4 of the gusset bag 2 is adsorbed by the movable suction cup 45 and the fixed suction cup 42. The bag transfer arm 37 is rotated counterclockwise while the gusset bag 2 is sucked and held, and the gusset bag 2 is transferred to the expansion mechanism 23 and held in a horizontal state. During the rotation, the rotating cam 51 is reversely rotated to separate the movable suction cup 45 from the fixed suction cup 42 by the urging force of the spring 48, and the bag mouth 4 is opened.

When the bag transfer arm 37 holds the gusset bag 2 vertically and the bag opening 4 is opened by the fixed suction cup 42 and the movable suction cup 45, the casing 57 is lowered by the lifting shaft 59, and the spats 62 and 63 are also lowered. Then, the spatulas 62 and 63 are inserted into the opened bag mouth 4. By rotating the rotation shaft 64 and pulling the upper rack 52 with the operating rod 61, the upper and lower racks 52, 53 are opened in opposite directions, and the spats 62, 63 are connected to the bag mouth 4 via the sliders 55, 56. Expand the ridge in the horizontal direction. With the spatula 62, 63 open, the movable suction cup 45 and the fixed suction cup 44 stop sucking, leave the gusset bag 2, and return to a standby state for receiving the next gusset bag 2.

When the bag delivery mechanism 22 starts to rotate downward as described above, the delivery mechanism 24 moves horizontally to the tops of the spats 62 and 63 as shown in FIG. 6, and the clip 76 grips the upper center of the bag mouth 4. . When the clip 76 finishes gripping the bag mouth 4, the casing 57 is raised by the lifting shaft 59 and is raised to a position where it does not contact the bag mouth 4 of the gusset bag 2 with the spatula 62, 63 being opened. When the spatula 62, 63 comes out of the bag mouth 4, the rotating shaft 75 rotates, the long arm 72 moves horizontally along the sliding rail 71 via the crank rod 74 and the sliding body 73, and stops intermittently. It moves to the position where the gusset bag 2 is delivered to the clamp 6 </ b> A of the clamp arm 6 of the rotary packaging machine 1.

Before the clamp 6A grips the gusset bag 2, the cylinder 90 of the rear pressing unit 81 extends to push and support the T-shaped support plate 91 toward the gusset bag 2 side, and at the same time, the driving support shaft 82 and the driven support shaft 83. Rotates and presses the gusset bag 2 with the holding plates 84 and 85. After pressing the gusset bag 2 with the pressing plates 84 and 85, the pressing plates 84 and 85 are opened, and at the same time, the clamp 6 </ b> A holds the upper portions on both sides of the gusset bag 2. Thereafter, the rotor 1A rotates to intermittently feed the gusset bag 2 to the bag opening process (2).

The above is the description until the bag mouth 4 of the gusset bag 2 is opened by the expansion mechanism 23 and delivered to the rotary packaging machine 2. Since the operation of the rotary packaging machine 1 after the gusset bag 2 is gripped by the clamp 6A is the same as that of the conventional rotary packaging machine 1, description thereof is omitted. In the rotary type packaging machine 1, as described above, the ridge portion of the gusset bag 2 is expanded in the horizontal direction and the bag mouth is sealed with the sealer 11, and then the bag mouth 4 is opened in a fan shape by the binding machine 5. The work is completed by binding.

According to the first embodiment, in the process of delivering the gusset bag 2 from the bag supply conveyor 3 to the rotary type packaging machine 1, the bag opening 4 of the gusset bag 2 can be expanded, and therefore the expansion time of the bag opening 4 can be shortened. , Packaging efficiency is improved.

(Example 2)
In the first embodiment, the mechanism for transferring the gusset bag 2 between the bag supply mechanism (bag supply conveyor) 3 and the expansion mechanism 23 is constituted by two mechanisms, a bag removal mechanism 21 and a bag transfer mechanism 22. However, these may be configured by one mechanism.

FIG. 10 is a partial side view of the bag opening mechanism 20 that functions as the bag removing mechanism 21 and the bag passing mechanism 22 with a single mechanism. The bag opening mechanism 20 includes a suction cup 107, and expands and contracts, and a first suction arm 102 that rotates while sucking and holding one surface of the gusset bag 2 is independent of the first suction arm 102. A second suction arm 104 that is rotatable and sucks the other surface opposite to the one surface of the gusset bag 2 sucked by the first suction arm 102 with a suction cup 103 to open the bag mouth. It is configured. These suction arms 102 and 104 are pivotally supported on a concentric rotating shaft 105.

The first suction arm 102 includes an air cylinder 106, the rod of the air cylinder 106 extends, and the suction cup 107 rotates by sucking and holding the uppermost gusset bag 2 in the bag supply conveyor 3. When the second suction arm 104 follows the rotating first suction arm 102, the rod of the air cylinder 106 extends, and when the other surface is sucked by the suction cup 103, the air cylinder 106 contracts conversely. Open the bag mouth.

While opening a bag mouth and not shown in figure, after inserting a pair of spatula 62,63 which narrowed the space | interval in a bag mouth, the rod of the air cylinder 106 is extended and a bag mouth is closed. At the same time as closing the bag mouth, although not shown, the bag mouth is widened with spatulas 62 and 63.

In the above description, the second suction arm 104 did not expand and contract. However, the second suction arm 104 may also move like the movable suction cup unit 39 of the first embodiment.

In addition, if the notch part is formed in the side part of a spatula like patent document 1, the delivery mechanism 24 of the said Example 1 will be lose | eliminated and the expansion mechanism 23 will be moved directly to the rotary type packaging machine side. The gusset bag can be gripped by the clamp 6A. In such a configuration, in order to pull out the spatula from the bag mouth, it must be closed and lifted once from the expanded state, There is a problem of lowering.

The present invention is useful, for example, as a rotary wrapping machine used for manufacturing a gusset bag in which a bag mouth is bound and opened in a fan shape.

1 Rotary packaging machine 2 Gusset bag 3 Bag supply conveyor (bag supply mechanism)
6 Clamp Arm 6A Clamp 20 Bag Removal Opening Mechanism 21 Bag Removal Mechanism 22 Bag Delivery Mechanism 23 Expansion Mechanism 24 Delivery Mechanism 26 Bag Removal Arm 37 Bag Delivery Arm 38 Fixed Suction Cup Unit 39 Movable Suction Cup Unit 42 Fixed Suction Cup 45 Movable Suction Cup 55 Slider 56 Slider 62 Spatula 63 Spatula 69 Clip mechanism 71 Slide rail 72 Long arm 73 Slider 76 Clip 79 Press mechanism 80 Front press unit 81 Back press unit 84 Press plate 85 Press plate 91 Base plate 102 First suction arm 103 Sucker 104 Second suction arm 107 Suction cup

Claims (3)

A plurality of clamp arms are provided on the outer periphery of the rotor, and a clamp is attached to the tip of the clamp arm. The gusset bag delivered from the bag feeding mechanism is gripped by the clamp and filled with the object to be packed while rotating intermittently. A rotary packaging machine for sealing
The bag supply mechanism includes a bag supply mechanism that supplies a gusset bag, a bag removal opening mechanism that takes out the gusset bag from the bag supply mechanism and opens the bag opening, and a bag opening of the gusset bag that is opened by the bag removal opening mechanism. A pair of spatulas is inserted into the bag to expand the ridges of the bag mouth in the lateral direction, and the upper part of the gusset bag expanded by the expansion mechanism is clamped by the clamp of the rotary packaging machine. A gusset composed of a delivery mechanism, a front presser unit and a rear presser unit, which is expanded laterally by the presser plate of the front presser unit and the receiving plate of the rear presser unit before the gusset bag is clamped A holding mechanism that holds the ridge of the bag,
A rotary type packaging machine comprising: The bag removal opening mechanism includes a suction cup at the tip of the bag removal arm, the suction cup absorbs the bag mouth of the uppermost gusset bag of the bag supply mechanism, and the bag removal mechanism lifts the bag mouth. A fixed suction cup unit is attached to the distal end of the bag passing arm, and a movable suction cup unit that approaches and separates from the fixed suction cup unit is further provided at the distal end of the fixed suction cup unit, and the bag stopped by rotating. A bag passing mechanism that rotates between a position to receive the gusset bag from the take-off arm and a position to transfer to the expansion mechanism;
Rotary packaging machine according to claim 1, which consists, it is characterized by the. The bag opening mechanism is configured such that a first suction arm that rotates by sucking and holding one surface of a gusset bag on a concentric rotation shaft, and the first suction arm can rotate independently. The second suction arm that pivotally supports the second suction arm that sucks the other surface opposite to the surface of the gusset bag that is sucked by the first suction arm, and is attached to the first suction arm that sucks and holds the gusset bag. The rotary type according to claim 1, wherein the arm follows and adsorbs the other surface, and at least one of the first and second arms contracts or extends to open the bag mouth. Packaging machine.

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