JP6270130B2 - Bag opening holding device of rotary packaging machine - Google Patents

Description

The present invention is, for example, a bag opening holding device for a rotary packaging machine that is equipped in a rotary packaging machine and expands and holds the bag mouth when packing a rectangular parallelepiped-shaped package that is difficult to fill the bag mouth of the packaging bag. About.

FIG. 5 is a side view of the bag opening holding device of the rotary packaging machine of Patent Document 1. In this type of rotary packaging device, when the packaging bag 20 stops on a rotating track, a pair of clamps 14 sandwiching both side edges of the packaging bag 20 approach each other to open the bag mouth, and generally in the bag mouth. A pair of opening rods 32 made of two bars are inserted into the bag, and the bag mouth is made square or circular by the separating action of the opening rods 32 in order to facilitate the filling of the package into the packaging bag 20. A means for enlarging is provided. It is desirable to perform the bag mouth widening action at the opening bag 32 while the packaging bag 20 moves from the front section to the rear section because of time constraints, and the opening bag 32 reciprocates between the front and rear sections. It is common to move.

In the bag opening holding device of the rotary packaging machine in FIG. 5, the flange 26 protrudes from the forward / reverse shaft 21 concentric with the rotor 13 in the rotor peripheral direction, and a pair of opening flanges 32 provided at the tip of the flange 26 are clamped 14. The bag mouth of the packaging bag 20 is expanded in order to fill the article to be packaged by moving the opening / closing rod 32 in a moving direction. The coil spring wound around the shaft 31 always urges the pair of opening rods 32 in the opening direction, but the urging force of the coil spring is suppressed by the contact of the attachment 36 with the bell stopper 58. That is, when the pair of opening rods 32 are relatively closest to each other and the rod 26 starts to rotate in the clockwise direction integrally with the rotor 13, the stopping crank 56 is separated in the counterclockwise direction, and the bell stopper 58. Rotates clockwise with the shaft rod 57 as a fulcrum, so that the pair of opening rods 32 are opened like phantom lines to expand the bag mouth of the packaging bag 20. That is, while the packaging bag 20 moves by one pitch, the four bar members constituting the opening ridge 32 expand the bag mouth of the packaging bag 20 into a square or a circle, so that the packaging bag 20 descends into the packaging bag 20 simultaneously with the stop. The package is filled into the bag through the morning glory hopper.

JP 2001-158405 A

A total of four bar members constituting the opening bag 32 of Patent Document 1 hold the bag mouth open so that the bag mouth of the packaging bag 20 can be expanded into a square or nearly circular shape to easily fill the package. However, depending on the object to be packaged, there is an object to be packaged that is difficult to fill in the opening bar 32 of the bar as described above. In other words, when the bar opening 32 is expanded, a square or nearly circular opening is formed. However, in the conventional opening 32, a rectangular parallelepiped package or assembly having a wide width and a small thickness, such as a book shape. things to be packaged with a rectangular parallelepiped shape, the packaging bag (e.g., a synthetic resin in an aluminum foil laminated with flat bag) has a problem that difficult to Hama charged to.

It is an object of the present invention to provide a bag opening holding device for a packaging machine that can be easily filled even with a rectangular parallelepiped package having a wide width and a small thickness.

The bag opening holding device of the rotary packaging machine of the present invention is a bag for a packaging bag for filling an object to be packed while following the rotation of a rotor having a pair of clamps for holding the packaging bag. A bag opening holding device of a rotary packaging machine having an opening mechanism for opening and holding a mouth, wherein the opening mechanism is a pair of arms that rotate in opposite directions to arms provided on a forward and reverse rotation shaft concentric with a rotor. rotating shaft is provided on the pivot shaft, the opening member is provided for expanding the bag mouth in the radial direction of the rotor, the opening member comprises a fixing plate to the central portion, on both sides of the fixed plate And a pair of opening and closing plates that rotate in directions opposite to each other in a direction intersecting with the radial direction of the rotor to expand the bag mouth in a direction intersecting with the opening direction of the opening member. The bracket is formed of a thin plate that can be inserted into Mounted suspended on the tip center of the bets, the pair of closing plates are also formed in the thin plate, said suspended on both sides of the bracket of the fixing plate is rotatably supported, characterized in that.

With the above configuration, the bag opening holding device of the rotary packaging machine of the present invention can be filled easily even if the width is wide and the thickness is thin.

Side view of the bag opening holding device of the rotary packaging device of the present invention The top view of the bag opening holding | maintenance apparatus of the rotary packaging apparatus of this invention Partial enlarged front view of bag opening holding device of rotary packaging device of the present invention Partial enlarged side view of the bag opening holding device of the rotary packaging device of the present invention Side view of bag opening and holding device of conventional rotary packaging device

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a bag opening holding device of a rotary packaging machine of the present invention, and FIG. 2 is a plan view of the bag opening holding device of the rotary packaging machine.

In FIGS. 1 and 2, reference numeral 60 denotes a forward / reverse shaft erected at the center of the rotor 66 of the rotary packaging machine, and an arm 62 for a bag opening holding device is attached to the upper end of the forward / reverse shaft 60 in the horizontal direction. On the contrary, it is attached to be rotatable. Although not shown, a rotating shaft for rotating the rotor 66 is fitted on the outer periphery of the forward / reverse rotating shaft 60.

A central shaft 61 is fitted inside the forward / reverse rotation shaft 60. The central shaft 61 moves up and down, but does not rotate or rotate in the forward / reverse direction. A crank 63 is provided at the upper end of the central shaft 61, one end of a link 64 is connected to the crank 63, and the other end of the link 64 is pivotally supported by a shaft 67 of the arm 62. A triangular operating plate 65 is connected. The operating plate 65 drives an interlocking link 69 at the tip of the arm 62 by an operating pin 68 at the corner. That is, an L-shaped receiving plate 70 that receives the rotational force of the operating plate 65 is attached to one end of one interlocking link 69A, and the interlocking link 69 is driven by pressing or separating the receiving plate 70, The lower ends of the opening members 71 and 72 of the opening mechanism 79 are opened and closed between an expanded position indicated by a virtual line and a close position indicated by a solid line.

One end of the interlocking link 69 is pivotally supported on the distal end portion of the arm 62 by rotating shafts 73 and 74, and the other end is pivotally supported by a pin 75. Each of the rotating shafts 73 and 74 is provided with a coil spring 76, and the opening members 71 and 72 provided on the rotating shafts 73 and 74 by the coil spring 76 are indicated by phantom lines in FIG. 1. Is always urged to expand.

A bracket 77 is attached to the middle upper part of the arm 62, and a sensor 78 is provided on the bracket 77. The sensor 78 can detect the open / closed state of the lower ends of the opening members 71 and 72 when the upper end portion of the receiving plate 70 is in contact or non-contact.

The configuration of the arm 62, the link 64, the operation plate 65, the receiving plate 70 and the like as described above is the same configuration as the bag opening holding device of the rotary packaging machine described in the background art, and is already a well-known technology. is there.

Next, the opening mechanism 79 will be described in detail. The opening mechanism 79 is provided at the tip end portions of the rotation shafts 73 and 74 that pivotally support one end of the interlocking link 69. The opening mechanism 79 is configured by providing opening members 71 and 72 as shown in FIGS. 3 and 4 at the tip ends of the rotating shafts 73 and 74. Each opening member 71 and 72 has the same configuration.

In the opening members 71 and 72, a bracket 80 is fixed to the distal ends of the rotation shafts 73 and 74. As shown in FIG. 4, the bracket 80 includes a fixing portion 81 for fixing to the rotating shafts 73 and 74, a substrate portion 82 extending horizontally from the fixing portion 81, and an inverted L shape from the substrate portion 82. It is comprised from the support part 83 bent.

An air cylinder 84 is attached to the back surface of the substrate portion 82, and a connecting plate 91 connected to an elevating plate 90 for operating opening / closing plates 86 and 87 described later is horizontally attached to the lower end of a rod 85 of the air cylinder 84. It is attached in the direction.

A fixing plate 89 is fixedly attached to the center portion of the support portion 83 of the bracket 80 with screws 88. The fixing plate 89 is made of a substantially rectangular thin plate made of synthetic resin, and as shown in FIG. It is attached.

As shown in FIG. 3, the opening and closing plates 86 and 87 are cut out at the lower inner side of a rectangular synthetic resin thin plate, and the upper inner side is formed in a step shape, and a pair of the opening and closing plates 86 and 87 is the fixed plate. The upper outer side is pivotally supported by the support portion 83 via a rotation shaft 92. The pair of opening and closing plates 86 and 87 can be opened and closed by the air cylinder 84 from a state indicated by a solid line to a closed state indicated by a two-dot chain line. This opening / closing movement will be described later.

One end of a rotation rod 93 is fixed to the rotation shaft 92, and when the other end of the rotation rod 93 moves up and down, the opening and closing plates 86 and 87 are opened and closed around the rotation shaft 92. The bolt 94 fixes the opening / closing plates 86 and 87 to the rotating rod 93.

The other ends of the left and right rotating rods 93 are connected by a lifting plate 90. That is, as shown in FIG. 3, the lifting plate 90 formed in a thick T-shape is notched at both upper ends in a U-shape, and the other end of the rotating rod 93 is connected to the U-shaped notch 95. They are connected via bolts 96. Further, the lower part of the lifting plate 90 is fixed by a bolt 97 to the tip of the connecting plate 91 attached to the rod 85 of the air cylinder 84.

Next, the use state of the bag opening holding device will be described.
The packaging bag 20 is supplied from the bag box to the rotor clamp of the rotary packaging machine, and the rotor 66 rotates and moves to the bag opening section. At that time, when the bag mouth is opened while adsorbing the front and back surfaces of the packaging bag 20 with the vacuum sucker, the forward / reverse rotation shaft 60 is lowered, so that the arm 62 and the opening member 71 of the opening mechanism 79 provided on the arm 62, 72 is inserted into the bag mouth.

When the opening mechanism 79 is inserted into the bag mouth, the crank 63 of the opening mechanism 79 pushes the operating plate 65 against the urging force of the coil spring 76 by the link 64, so that the operating plate 65 is centered about the shaft 67. Rotate clockwise. As the operating plate 65 rotates, the operating pin 68 pushes the receiving plate 70 in the clockwise direction, so that the pivot shafts 73 and 74 are rotated in the reverse direction by the interlocking link 69, and as shown by the solid line in FIG. The lower ends of the members 71 and 72 are close to each other.

Further, as shown by a two-dot chain line in FIG. 3, the opening and closing plates 86 and 87 of the opening members 71 and 72 are close to each other and the opening and closing plates 86 and 87 are narrowed on the lower side and easily enter the bag mouth. That is, in the state of the opening and closing plates 86 and 87, the rod 85 of the air cylinder 84 is contracted and the lifting plate 90 is in the raised position. When the elevating plate 90 is in the raised position, the other end of the rotating rod 93 connected via the connecting bolt 96 is positioned upward, and the opening / closing plates 86 and 87 are connected to the two points shown in FIG. The lower part narrows like a chain line.

As described above, the lower ends of the pair of opening members 71 and 72 are narrowed, and the lower ends of the opening and closing plates 86 and 87 are also narrowed so that they can easily enter the bag mouth. The lower end of the opening mechanism 79 is easily inserted into the bag mouth. In addition, since the lower end of the conventional opening bag 32 does not close narrowly like the opening / closing plates 86 and 87, there is a possibility that an insertion error into the bag mouth of the packaging bag 20 opened in an elliptical shape may occur.

When the lower end of the opening mechanism 79 is inserted into the bag mouth of the packaging bag 20, the arm 62 provided on the forward / reverse rotation shaft 60 rotates while following the rotor 66 as described above. Although the operation plate 65 accompanies the rotation of the arm 62, the central shaft 61 does not rotate like the forward / reverse rotation shaft 60. Therefore, the distance between the tip of the crank 63 attached to the central shaft 61 and the operation plate 65 is long. Therefore, the upper end of the operation plate 65 is pulled back by the link 64 by the longer distance. For this reason, since the operating plate 65 rotates clockwise around the shaft 67 and the operating pin 68 rotates away from the receiving plate 70, the rotating shafts 73 and 74 are rotated by the urging force of the coil spring 76. As shown by the two-dot chain lines in FIG.

Simultaneously with the expansion of the opening members 71 and 72, the rod 85 of the air cylinder 84 shown in FIG. When the elevating plate 90 is pushed down, the rotating rod 93 and the rotating rod 93 rotate in opposite directions via the connecting bolt 96, and the lower ends of the opening and closing plates 86 and 87 expand as shown by the solid line in FIG. .

By opening the opening members 71 and 72 and the opening and closing plates 86 and 87, both sides of the bag mouth are widened, and the opening can be made in a shape close to a rectangle. For this reason, even if it is a single-piece | unit or aggregate to-be-packaged object with a wide width | variety and thickness, it can throw in easily from upper direction.

In the above embodiment, the opening members 71 and 72 are constituted by the fixed plate 89 and the opening and closing plates 86 and 87. However, the opening members 71 and 72 may be constituted only by the opening and closing plates 86 and 87. It should be noted that the opening / closing plates 86 and 87 may be configured such that the interval can be adjusted according to the width of the bag mouth so that the bag mouth can be easily pulled out after the bag mouth is expanded.

INDUSTRIAL APPLICABILITY The present invention is useful, for example, for a bag opening holding device of a rotary packaging machine that expands a bag opening of a packaging bag when packing a rectangular parallelepiped-shaped package that is difficult to fill into the bag opening of a packaging bag.

20 Packaging bag 60 Forward / reverse shaft 61 Central shaft 62 Arm 66 Rotor 69 Interlocking link 71 Opening member 72 Opening member 73 Rotary shaft 74 Rotary shaft 76 Coil spring 79 Opening mechanism 80 Bracket 84 Air cylinder 86 Opening and closing plate 87 Opening and closing plate 89 Fixed Plate 90 Lift plate 91 Connecting plate 92 Rotating shaft 93 Rotating rod

Claims (2)

A rotary packaging machine having an opening mechanism for opening and holding the bag mouth of the packaging bag in order to fill the packaged object while following the rotation of the rotor having a plurality of clamps that make a pair of holding the packaging bag. A bag opening holding device,
In the opening mechanism, a pair of rotating shafts that rotate in opposite directions are provided on an arm provided on a forward and reverse rotating shaft concentric with the rotor, and a bag mouth is expanded on the rotating shaft in the radial direction of the rotor. An opening member that opens is provided,
The opening member is provided with a fixing plate at a central portion, and on both sides of the fixing plate, the bag rotates in directions opposite to the radial direction of the rotor and rotates in opposite directions to cross the opening direction of the opening member. It has a pair of opening and closing plates that widen the mouth,
The fixing plate is formed of a thin plate that can be inserted into the bag mouth, and is attached to the center of the tip of a bracket attached to the rotating shaft, and a pair of opening and closing plates is also formed of a thin plate, It is pivotally supported by the bracket so that it can rotate.
A bag opening holding device of a rotary packaging machine. The fixing plate is made of a substantially rectangular thin plate, and is attached to the outside of the opening and closing plate. The opening and closing plate is cut out at the lower inner side of the rectangular thin plate, and the upper inner side is formed in a step shape. upper outer is rotatably supported to the support portion of the rotatable bracket via a pivot shaft, said pivot shaft is fixed to one end of a pivot rod, the other end of the pre Machinery kinematic rod lift plate The lower part of the lifting plate is fixed to a connecting plate attached to the rod of the air cylinder,
The bag opening holding device of the rotary packaging machine according to claim 1.

Images