JP2009166850A - Bag expanding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bag expanding device capable of reliably expanding an opening of a bag body to be rapidly conveyed. <P>SOLUTION: In a traveling means 51 of the bag expanding device, two upright shafts 56 and 57 separated from each other in the conveying direction are supported by a frame 10 connected to an adequate part of a casing of an envelope packing device 1, and two endless cable bodies 59 are wound around rotary rings 58 provided on upper and lower parts of the upright shafts 56 and 57. The upright shaft 56 is rotated in a direction indicated by an arrow mark &alpha; by a rotating machine 510 with a reduction gear. Thus, the cable bodies 59 travel in the conveying direction. In a stroke in which an adsorption means 52 travels together with the cable bodies 59, an outer roller 519 is elevated and lowered following an outer cam rail 518, and an adsorption pad 50 is elevated and lowered together with a supporting body 514. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a bag expanding device that expands an opening of a bag when a content such as a paper piece or a booklet is inserted into the opening of a bag such as an envelope.

  Patent Documents 1 and 2 disclose a technique for widening the opening of a bag body by using a suction pad that sucks the bag body or a nail that grips the bag body. However, when the contents are continuously inserted into a large number of bags, the opening of the bag must be widened while the bags are being conveyed. Further, if the operation of the suction pad or the nail is speeded up to increase the number of operations for inserting the contents into the bag body per predetermined time, the bag body may be waved due to these reciprocating motions. Vibration occurs.

As shown in Patent Document 1, a structure in which a suction pad is attached to an arm (梃) that is rotated by an opening / closing cylinder increases the vibration described above. Further, since the arm pivots the suction pad around its rotation fulcrum, an inertial force in the centrifugal direction is generated on the bag body sucked by the suction pad, in other words, a force that causes the bag body to slide to the suction pad is generated. For this reason, the speeding up of the operation of the suction pad induces a problem that the bag body is detached from the suction pad.
JP 2004-136904 A JP-A-5-111968

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a bag expanding device capable of reliably expanding the opening of a bag body that is conveyed at high speed.

  The bag expanding apparatus according to the present invention is a process in which the bag body having the upper edge portion of the opening is transported to widen the opening of the bag body, and is synchronized with the speed at which the bag body is transported. Traveling means for traveling the checker, suction means for moving the suction pad attached to the checker up and down with respect to the bag, and a hook for moving the claw attached to the checker forward and backward to the opening of the bag And the hooking means lowers the suction pad in a state where the claw retracts the claw from the opening of the bag body, so that the upper edge portion of the opening is sucked to the suction pad. And when the suction means raises the suction pad, the hook means causes the claw to enter the opening in a state where the upper edge portion sucked by the suction pad is pulled up. .

  Furthermore, in the bag expanding apparatus according to the present invention, the suction means includes a slide rail that is attached to the checker and extends in the vertical direction, and a slider that slidably engages the slide rail and supports the suction pad. And an elevating drive means for elevating the suction pad together with the slider.

  Furthermore, in the bag expanding apparatus according to the present invention, the hooking means causes the claw to protrude from the lower end and the claw enters the opening of the bag body, or the claw detaches from the bag body. A swing arm supported by the checker, and a roller that is provided at a lower end of the swing arm and that makes rolling contact with the contents guided by the pair of guide rails. To do.

  Furthermore, the bag expanding apparatus according to the present invention includes a pair of guide rails that are arranged at an interval through which the contents can pass and guide the contents toward the bag body, and the pair of guide rails that are disposed in the bag. Rail tracking means for moving the body in synchronization with the speed at which the body is conveyed and rail advance / retreat means for advancing / retreating the pair of guide rails to / from the opening of the bag body are provided.

  Furthermore, the bag expanding device according to the present invention is provided with a pair of guide pieces extending forward from the pair of guide rails toward the bag body so as to be pivotable on the pair of guide rails. When the means advances the pair of guide rails toward the opening of the bag body, the pair of guide pieces are rotated in directions in which the respective tips are separated from each other, and the rail advance / retreat means is the pair of guide rails. When the bag is retracted from the opening of the bag body, the pair of guide pieces are rotated in directions in which the respective tips approach each other.

  According to the bag expanding device of the present invention, the hooking means causes the claw to enter the opening of the bag body with the suction means pulling up the upper edge of the opening sucked by the suction pad, and The edge can be hooked with a nail. Thereby, it can prevent that the upper edge part of the opening of a bag loosens below, and can prevent the content inserted in a bag body from being caught by the upper edge part of an opening.

  Further, according to the bag expanding device of the present invention, the suction pad can be raised along the slide rail extending in the vertical direction, so that the upper edge portion of the opening of the bag body adsorbed by the suction pad is set to the true side. Can be pulled up. For this reason, when the suction pad is lifted, there is no inertial force that causes the bag to slide sideways with respect to the suction pad. This is advantageous in increasing the number of operations for inserting the.

  Furthermore, according to the bag expanding apparatus according to the present invention, the roller provided at the lower end of the swing arm is brought into rolling contact with the content guided toward the bag body by the pair of guide rails. Just before entering the body opening, it is pushed down by the roller. For this reason, even if the contents are warped, the contents can be prevented from being caught on the upper edge of the opening.

  Furthermore, according to the bag expanding apparatus according to the present invention, the pair of guide pieces can be rotated in the direction in which the distal ends thereof are separated from each other in a state where the pair of guide rails are advanced toward the opening of the bag body. . Thus, the pair of guide rails can enter the opening of the bag body, and the shape of the opening of the bag body can be regulated so that the width of the opening of the bag body is wider than the contents.

  The above-described effects are obtained when the contents bulge into a convex shape, the contents are curved in a bow shape, or the contents are rugged that is easily caught in the opening of the bag body. It is especially effective for inserting into.

  An envelope filling apparatus 1 shown in FIG. 1 is a unit in which a film supply means 2, a bag making apparatus 3, a conveying means 4, and a bag expanding apparatus 5 according to the present invention are integrally coupled.

  The film supply means 2 is for feeding a long film 7 wound in a roll shape to the bag making apparatus 3 in the middle of the width direction in a folded manner. The bag making apparatus 3 continuously forms a bag body 8 such as an envelope by melting a halfway in the longitudinal direction of the film 7 that is folded in two. The conveying means 4 is a belt conveyor that arranges a plurality of bag bodies 8 in a line and conveys them in the conveying direction indicated by the arrow T.

  The bag expanding device 5 will be described in detail below. The drawings refer to FIGS. 1 to 6 unless otherwise specified. 2 represents a cross section taken along line X1-X1 of FIG. 1, and FIG. 3 is an exploded perspective view of FIG. 2 viewed from the left side. The bag expanding device 5 includes a traveling means 51 disposed above the conveying means 4, a plurality of suction means 52 and 53 for moving the suction pad 50 up and down relative to the bag body 8, and an arrow crossing the claw 54 in the conveying direction. and a plurality of latching means 55 for advancing and retracting in the a and b directions.

  The traveling means 51 supports two upright shafts 56 and 57 that are separated from each other in the transport direction by a frame 10 connected to an appropriate position of the casing of the envelope filling device 1, and is provided above and below the upright shafts 56 and 57. Two endless checkers 59 are respectively wound around the provided rotating wheels 58. The upright shaft 56 is rotated in the direction indicated by the arrow α by a rotating machine 510 with a speed reducer. Thereby, the check body 59 travels in the transport direction. An endless chain may be applied as the check body 59, and a sprocket may be applied to the rotating wheel 58. Alternatively, a timing belt may be applied as the check body 59 and a timing pulley may be applied to the rotating wheel 58.

  The suction means 52 includes a slide rail 513 supported by the base material 512, a slider 515 that slidably engages the slide rail 513 and supports the suction pad 50 via the support body 514, and a lift drive means 516. Prepare. The upper end and the lower end of the base material 512 are attached to the two checkers 59 using attachment fittings 591, respectively. The suction pad 50 sucks air from the elastic mouth material opened downward by the negative pressure supplied through the hose 501. In the middle of the hose 501, an on-off valve not shown in the figure is provided so that the negative pressure can be shut off in a timely manner.

  The elevating drive means 516 has a shaft body 517 that passes through the elongated hole 511 attached to the support body 514 of the suction means 52, and an outer roller 519 that rolls and contacts the outer cam rail 518 at the tip of the shaft body 517. . In the process in which the suction means 52 travels together with the check body 59, the outer roller 519 moves up and down according to the outer cam rail 518, whereby the suction pad 50 moves up and down together with the support body 514.

  The suction means 53 is the same as the suction means 52 except for the following points. The lifting / lowering drive means 520 of the suction means 53 attaches the base end of the suspension member 523 that passes through the elongated hole 522 to the support body 521, and an inner roller 525 that rolls and contacts the inner cam rail 524 at the distal end of the suspension member 523. It is attached. In the process in which the suction means 53 travels with the checker 59, the inner roller 525 moves up and down according to the inner cam rail 524, whereby the suction pad 50 moves up and down together with the support body 521. The plurality of suction means 52 and 53 and the plurality of hooking means 55 are arranged so as to repeat the order shown in FIG.

  The outer cam rail 518 and the inner cam rail 524 are oval tracks that circulate around the two upright shafts 56 and 57. A part of this orbit is shown in FIG. In the stroke in which the suction means 52 and 53 travel as described above, the timings of raising and lowering the outer roller 519 and the inner roller 525 of the outer cam rail 518 and the inner cam rail 524 coincide with each other. . Reference numeral 526 in FIG. 2 indicates a stay for fixing the outer cam rail 518 and the inner cam rail 524 to the frame 10.

  5 shows a cross section of FIG. 1 taken along line X2-X2, and FIG. 6 is an exploded perspective view of FIG. 5 viewed from the left side. The latching means 55 is provided with an L-shaped steel plate 528 at the lower end of the swing arm 527 and a roller 529 attached to the L-shaped steel plate 528. The claw 54 corresponds to the tip of the L-shaped steel plate 528. The roller 529 is rotatably supported by a bracket 530 attached to the L-shaped steel plate 528 and protrudes downward from the claw 54. The swing arm 527 is fixed to the pin 533 through a pair of connecting pieces 539 through a pin 533 inserted in a hole of a sliding member 532 provided on the base material 531. Further, a follower 535 provided with a driven roller 534 at the tip is fixed to the end of the pin 533.

  The driven roller 534 is in rolling contact with the cam rail 536. The cam rail 536 is a track that circulates around the two upright shafts 56 and 57, and is fixed to the frame 10 at a position lower than the outer cam rail 518 and the inner cam rail 524. In the process in which the latching means 55 travels together with the check body 59, the driven roller 534 moves up and down according to the cam rail 536, whereby the swing arm 527 rotates in the directions of arrows a and b with the pin 533 as a fulcrum. Reference numeral 537 in FIG. 5 indicates a stopper that abuts against the swing arm 527 in order to define a limit at which the claw 54 can be retracted in the direction indicated by the arrow b. Reference numeral 538 indicates a return spring composed of a tension spring. Reference numeral 540 indicates a guide member in which the check body 59 is in sliding contact between the two upright shafts 56 and 57.

  Furthermore, the bag expansion device 5 includes an insertion device 6 for inserting the contents 9 into the bag body 8 shown in FIG. FIG. 7 shows the structure of the insertion device 6. The form which looked at the insertion apparatus 6 from the direction pointed by arrow i appears in FIG. In the insertion device 6, the guide rails 61 and 62, the push rods 63 and 64, the push followers 70 and 71 joined to the push rods 63 and 64, and the push followers 70 and 71 are separated. The push cam rail 72 which contacts, the rail follower means 610, and the rail advance / retreat means 611 are provided. The contents 9 are supplied between the guide rails 61 and 62 from a feeder not shown in the figure.

  The rail follower 610 wraps four checkers 68 and 69 around eight sprockets 66 and 67, and guide rails 61 and 62 and a push on the four checkers 68 and 69 which are endless chains. Rods 63 and 64 are connected. The rotating shaft 60 is connected to a rotating machine. When the rotating machine rotates the sprockets 66 and 67 together with the rotating shaft 60, the guide rails 61 and 62 and the push rods 63 and 64 together with the checkers 68 and 69 travel along the transport direction, and the transport. The process of traveling backward in the direction is repeated. Hereinafter, the movement or movement of the elements of the bag expanding device 5 and the insertion device 6 toward the front in the transport direction is referred to as “forward movement”.

  The rail advance / retreat means 611 is configured such that guide followers 73 and 74 connected to the guide rails 61 and 62 are slidably engaged with the guide cam rails 75 and 76. Only the upper portions of the guide cam rails 75 and 76 (the trajectory on which the guide followers 73 and 74 move forward) are shown in FIG. 7, but the endless raceway is the same as the push cam rail 72 shown in FIG. It is. In addition, although two guide rails 61 and 62 and two push rods 63 and 64 are illustrated, in reality, dozens of guide rails and push rods are alternately arranged.

  As shown in FIG. 9, the pair of guide rails 61 and 62 are connected to the checkers 68 and 69 as follows in a posture in which the horizontal pieces 65 are opposed to each other. The guide rail 61 is connected to the check body 68 via the guide means s, but is not connected to the check body 69 shown in FIG. The guide rail 62 is connected to the checker 69 via the guide means s ′, but is not connected to the checker 68. The guide means s and s' connect the guide rails 61 and 62 to the checkers 68 and 69 so as to be slidable in the respective longitudinal directions. The push rods 63 and 64 are slidably connected to the check body 68 in the same manner as the guide rail 61.

  The distance between the guide rails 61 and 62 can be adjusted as follows. The sprocket 66 around which the check body 68 is wound is fixed to the rotary shaft 60 with a key or the like. However, the sprocket 67 around which the check body 69 is wound is not directly fixed to the rotary shaft 60, and the sprocket 66. It is tightened with bolts. If the bolts are loosened, the sprocket 67 can be rotated with respect to the sprocket 66, so that the checker 68 and the checker 69 can be relatively displaced in the transport direction. Accordingly, the guide rail 61 connected to the check body 68 and the guide rail 62 connected to the check body 69 relatively move forward or backward within the range indicated by the dimension line x in FIG.

  Further, the pair of guide rails 61 and 62 are provided with guide pieces 77 and 78 described later shown in FIG. Further, as shown in FIG. 11, a suction plate 42 is in close contact with the lower side of the belt 41 of the conveying means 4. A plurality of vent holes 43 are formed in the belt 41, and the suction plate 42 has a vent groove 44 formed immediately below the vent holes 43. An air blower or the like connected to the vent groove 44 sucks air from the vent hole 43 to generate a suction force for sucking the bag body 8 placed on the belt 41. The speed at which the transport means 4 transports the bag body 8 is the speed at which the belt 41 travels in the transport direction. As a rotating machine for driving the belt 41 and a rotating machine for the rail following means 610, the speed of the belt 41 and the speed at which the check bodies 68 and 69 of the rail following means 610 travel match each other. It is preferable to apply pulse motors that are synchronized with each other.

  The bag body 8 has a side edge 81 where the film 7 is melted in the bag making apparatus 3, and a fold 82 when the film 7 is folded in half is the back end. The bag making apparatus 3 can increase or decrease the width of the bag body 8 (the dimension in the transport direction) simply by increasing or decreasing the interval at which the film 7 is melted.

  Next, operation | movement of the bag expansion apparatus 5 is demonstrated. The following English letters at the beginning of the sentence are indicators for distinguishing the operation process.

  The content 9 shown in FIG. 7 is A4 size. When this is changed to the B5 or B4 size, the operator moves the guide rail 61 relative to the guide rail 62 that precedes the conveyance direction among the guide rails 61 and 62 of the insertion device 6 by the amount of increase or decrease in the width of the contents 9. It moves forward or backward within the range indicated by the dimension line x in FIG.

  Further, when changing the size of the bag body 8, the operator quickly and repeatedly starts and stops the rotating machine 510 of the traveling unit 51 while stopping the rotating machines of the transport unit 4 and the rail tracking unit 610. The checker 59 is made to travel in small increments. Thereby, when the position of the hooking means 55 in the transport direction matches the position of dividing the width of the bag 8 of a new size transported by the transport means 4 into two equal parts, the rotating machine 510 is stopped. When the operator simultaneously activates the rotating machine 510, the rotating machine of the conveying means 4, and the rotating machine of the rail following means 610, the checker 59 of the traveling means 51 causes the belt 41 of the conveying means 4 and the rail follower to move. The vehicle travels at a speed corresponding to the checkers 68 and 69 of the moving means 610.

  A: The bag body 8 transported to the transport means 4 shown in FIG. 2 faces the suction means 52 and 53 shown in FIG. In this state, when the suction pads 50 of the suction means 52 and 53 are lowered, the two suction pads 50 simultaneously suck the upper edge portion 84 of the opening 83 of the bag body 8. Since the speed at which the traveling means 51 travels the suction means 52 and 53 together with the check body 59 is synchronized with the speed at which the transport means 4 transports the bag body 8, the suction of the upper edge 84 by the suction pad 50 is maintained. Further, when the suction pad 50 sucks the bag body 8, the swing arm 527 of the latching means 55 is rotated in the direction of the arrow b as shown by the phantom line in FIG. The body 8 is retracted from the opening 83.

  B: The suction pads 50 of the suction means 52 and 53 rise. As a result, the upper edge 84 of the opening 83 sucked by the two suction pads 50 is pulled up, while the lower surface of the bag body 8 is sucked by the belt 41 of the conveying means 4, so that the opening 83 of the bag body 8 moves up and down. Will be spread in the direction. Refer to FIG. 12 for the bag body 8.

  C: The swing arm 527 of the latching means 55 rotates in the direction of arrow a from the position indicated by the solid line in FIG. 5 and reaches the position indicated by the phantom line in FIG. Thereby, since the nail | claw 54 approachs into the opening 83 of the bag body 8, and the upper edge part 84 of the opening 83 can be latched with the nail | claw 54, it can prevent that the upper edge part 84 loosens below.

  D: In the stroke in which the check bodies 68 and 69 of the insertion device 6 are moved forward, the push follower 70 of the push rod 63 shown in FIG. 7 passes from the point a attached to the push cam rail 72 through the point b. It moves toward the position of the push rod 64 shown on the left side. In this process, the content 9 supplied between the pair of guide rails 61 and 62 is pushed out toward the bag body 8 by the push rod 63.

  E: Immediately after the contents 9 are pushed out by the push rod 63 in the step D, the guide followers 73 and 74 pass immediately after the points d and d ′ attached to the guide cam rails 75 and 76. The pair of guide rails 61 and 62 advance from the position indicated by the solid line in FIG. 7 to the position indicated by the phantom line in FIGS. Accordingly, the pair of guide rails 61 and 62 approaches the bag body 8, and the content 9 pushed by the push rods 63 and 64 can be guided to the vicinity of the opening 83 of the bag body 8.

  As shown in FIGS. 10 and 12, the pair of guide pieces 77 and 78 have their distal ends 79 extending from the pair of guide rails 61 and 62, respectively. The base ends 710 of the pair of guide pieces 77 and 78 are rotatably supported by the pair of guide rails 61 and 62. As described above, when the pair of guide rails 61 and 62 have moved forward to the bag body 8, the pair of guide pieces 77 and 78 are rotated in directions away from each other, and are represented by phantom lines in FIG. Become posture. Thereby, the shape of the opening 83 can be regulated so that the pair of guide pieces 77 and 78 enter the opening 83 and the width of the opening 83 of the bag body 8 is wider than the width of the contents 9.

  In addition, since the cross-section of the pair of guide pieces 77 and 78 is substantially U-shaped, both side edges of the contents 9 pushed forward of the pair of guide rails 61 and 62 are covered by the pair of guide pieces 77 and 78. It is possible to prevent the contents 9 from deviating from the opening 83 of the bag body 8. Since the speed at which the rail follower 610 moves the guide rails 61 and 62 is synchronized with the speed at which the transport means 4 transports the bag body 8, the pair of guide pieces 77 and 78 have entered the opening 83 of the bag body 8. State is maintained.

  A means for operating the pair of guide pieces 77 and 78 is not limited in any way, but a cam mechanism for rotating the pair of guide pieces 77 and 78 as described above according to the cam rail 26 shown in FIG. 7 may be applied. Further, a bottom receiving plate 27 for supporting the contents 9 is added between the pair of guide rails 61 and 62, and when the pair of guide rails 61 and 62 approaches the bag body 8, the bottom receiving plate 27 is You may make it approach the bag body 8. FIG.

  F: The negative pressure supplied to the suction pad 50 is cut off, and the upper edge 84 of the opening 83 is released from the suction pad 50. Thereafter, the adsorbing means 52, 53 and the latching means 55 go around the two upright shafts 56, 57, respectively, and the steps A to C are repeated.

  G: The push follower 70 moves forward from the point b attached to the push cam rail 72 to the point c, and the push rod 63 stops with respect to the bag body 8. Then, when the push follower 70 passes the point c, the push rod 63 moves backward from the bag body 8 according to the push cam rail 72.

  H: In a process in which the guide followers 73 and 74 that have passed the above points d and d ′ further travel to the points e and e ′, the pair of guide rails 61 and 62 remain stationary with respect to the bag body 8. However, immediately after the guide followers 73 and 74 have passed the points e and e ′, the pair of guide rails 61 and 62 retreats from the position indicated by the phantom line in FIG. 10 to the position indicated by the solid line in FIG. In this process, the pair of guide pieces 77 and 78 rotate in a direction in which the distal ends 79 approach each other. This step proceeds almost simultaneously with the above step G. After the steps G and H, the pair of guide rails 61 and 62 and the push rod 63 return to the position shown on the right side of FIG. 7, and the steps after D are repeated.

  In the steps A to C, attention is paid to the suction means 52 and 53 shown in FIG. 3, but suction means that are not shown in the drawings other than these are also moved up and down in order, and each of the plurality of bag bodies 8 is moved up and down. The openings 83 can be sequentially expanded as described above. Further, the push rods not shown in the drawings other than the push rods 63 and 64 and the guide rails not shown in the drawings other than the guide rails 61 and 62 are also formed on the plurality of bag bodies 8 by repeating the above-described operation. The contents 9 can be inserted sequentially.

  As described above, since the bag expanding device 5 includes a plurality of suction means 52 and 53, the period in which each suction pad 50 moves up and down is relatively long, and small vibrations caused by the lifting and lowering of each suction pad 50 are performed. It is advantageous to reduce. Further, since the suction means 52 and 53 raise and lower the suction pad 50 together with the slider 515 along the slide rail 513 extending linearly in the vertical direction, the upper edge 84 of the opening 83 sucked by the suction pad 50 is formed. , Can be pulled right above. Therefore, when the suction pad 50 is raised, no inertial force that causes the bag body 8 to slide sideways with respect to the suction pad 50 is generated, which is advantageous in speeding up the operation of raising and lowering the suction pad 50.

  Further, according to the bag expanding device 5, the roller 529 is placed on the upper surface of the contents 9 guided by the pair of guide rails 61 and 62 in a state where the swing arm 527 is rotated in the direction of arrow a in the step C. , The contents 9 are pushed down by the roller 529 immediately before entering the opening 83 of the bag body 8. Thereby, even if the contents 9 are warped, the contents 9 can be prevented from being caught on the upper edge portion 84 of the opening 83, and the contents 9 can be smoothly inserted into the bag body 8. The effects described here are particularly effective when the contents 9 swell in a convex shape, the contents 9 are curved in a bow shape, or the contents 9 are concavo-convex shapes that are easily caught in the openings 83.

  It should be noted that the present invention can be implemented in a mode in which various improvements, modifications, or variations are added based on the knowledge of those skilled in the art without departing from the spirit of the present invention. In the above description, the structure in which the elements of the bag expanding device 5 and the insertion device 6 are operated according to the cam rail is illustrated, but the cam rail is not essential. For example, the above-described operation may be realized by a servo motor or an air cylinder that can be controlled by a computer based on a program written in a storage medium.

  12 may be supplied from the feeder between the pair of guide rails 61 and 62 shown in FIG. 7. The small contents 9 'shown in phantom lines in FIG. In this case, the L-shaped steel plate 528 is attached to the swing arm 527 so as to be movable in the conveying direction, and the L-shaped steel plate 528 is further fastened to the swing arm 527 with a bolt or the like. When the bolt or the like is loosened, the position of the L-shaped steel plate 528 can be adjusted so that the roller 529 can be brought into rolling contact with the upper surface of the contents 9 '.

  Since the present invention can insert the contents into the envelope continuously at high speed without depending on the manpower, for example, when a product catalog is mailed by direct mail, a large amount of contents are packed into a large number of envelopes at a time. It is a useful technique.

The top view which shows the example of installation of the bag expansion apparatus which concerns on embodiment of this invention. X1-X1 sectional view taken on the line of FIG. The disassembled perspective view which shows the principal part of the adsorption | suction means of the bag expansion apparatus which concerns on embodiment of this invention. The top view which shows the principal part of the travel means of the bag expansion apparatus which concerns on embodiment of this invention. X2-X2 sectional view taken on the line of FIG. The disassembled perspective view which shows the principal part of the latching means of the bag expansion apparatus which concerns on embodiment of this invention. The top view of the insertion apparatus and conveyance means which were applied to embodiment of this invention. The perspective view which shows the principal part of the insertion apparatus applied to embodiment of this invention. The side view which shows the attachment structure of a pair of guide rail of the bag expansion apparatus which concerns on embodiment of this invention. The top view which shows the usage example of a pair of guide rail of the bag expansion apparatus which concerns on embodiment of this invention. The perspective view which fractured | ruptured a part of conveyance means applied to embodiment of this invention. The perspective view which shows the state which opened the opening of the bag body with the bag expansion apparatus which concerns on embodiment of this invention.

Explanation of symbols

5: Bag expanding device 8: Bag body 9: Contents 50: Suction pad 51: Traveling means 52, 53: Suction means 54: Claw 55: Latching means 59: Check body 61, 62: Guide rails 77, 78: Guide piece 79: Tip 83: Opening 84: Upper edge 160: Rail follower 513: Slide rail 515: Slider 527: Swing arm 529: Roller 610: Rail follower 611: Rail advance / retreat means 710: Base end

Claims (5)

In the process of transporting the bag body having the upper edge of the opening, a bag expanding device for expanding the opening of the bag body,
Traveling means for running the checker in synchronization with the speed at which the bag is conveyed, suction means for moving the suction pad attached to the checker up and down relative to the bag, and attached to the checker Hooking means for advancing and retracting the nail to the opening of the bag body,
With the hooking means retracting the claw from the opening of the bag body, the suction means lowers the suction pad so that the upper edge of the opening is sucked to the suction pad,
When the suction means raises the suction pad, the hooking means causes the claw to enter the opening in a state where the upper edge portion sucked by the suction pad is pulled up. Opening device.   The suction means is a vertically extending slide rail attached to the checker, a slider that slidably engages the slide rail and supports the suction pad, and lifts the suction pad together with the slider. The bag expanding apparatus according to claim 1, further comprising an elevating drive unit. The latching means is supported by the checker so that the claw protrudes from the lower end and can be rotated in a direction in which the claw enters the opening of the bag body or a direction in which the claw detaches from the bag body. Swing arm,
A roller provided at a lower end of the swing arm and in rolling contact with contents guided by the pair of guide rails;
The bag expanding apparatus according to claim 1 or 2, further comprising:   A pair of guide rails that are arranged with an interval through which the contents can pass each other and guide the contents toward the bag body, and the pair of guide rails are moved in synchronization with the speed at which the bag body is conveyed. The bag expanding device according to claim 3, further comprising rail following means and rail advancing / retreating means for advancing and retreating the pair of guide rails to and from the opening of the bag body. A pair of guide pieces extending from the pair of guide rails toward the bag body is provided on the pair of guide rails so as to be rotatable,
When the rail advance / retreat means advances the pair of guide rails toward the opening of the bag body, the pair of guide pieces are rotated in directions in which the respective distal ends are separated from each other,
The said rail advancing / retreating means rotates the pair of guide pieces in directions in which the respective tips approach each other when the pair of guide rails retracts the pair of guide rails from the opening of the bag body. The bag expanding apparatus as described.

Images