JP4354362B2 - Packaging bag feeder - Google Patents

Description

  The present invention relates to a packaging bag supply device for an automatic packaging machine. More specifically, the present invention relates to a feeding device in which a large number of packaging bags are placed side by side so as to tilt backward in the feed direction on a belt conveyor and are installed above the belt conveyor. The present invention relates to a packaging bag supply device configured to rapidly feed a feeding belt from a belt conveyor and to convey the packaging bags in order from the column of the packaging bags to a predetermined position in front of the belt conveyor in the feeding direction.

As one type of this type of packaging bag supply device, Japanese Patent Application Laid-Open No. 10-194238 discloses that a first lever and a second lever are swung vertically by a support shaft in a housing of a feeding device installed above a belt conveyor. The front pulley is attached to the lower end of the first lever, the main pulley is attached to the upper end of the first lever, the main pulley and the main shaft of the feed motor built in the housing are connected by a transmission belt, and the second lever A packaging bag supply device is disclosed in which a rear pulley and an intermediate pulley are attached to a main belt, an intermediate pulley and a front pulley are passed through and a feeding belt is stretched between the main pulleys.
In this packaging bag supply device, the front pulley and the rear pulley are attached to separate levers, and the distance between the belt conveyor and the front pulley and the distance between the belt conveyor and the rear pulley can be individually adjusted. With this configuration, the distance between both pulleys and the belt conveyor is set appropriately according to the type of packaging bags with different thicknesses and lengths, the feeding belt is fast-forwarded from the belt conveyor, and the packaging bags are sandwiched between both belts. The packaging bag is separated from the subsequent packaging bag and conveyed until it abuts against a stopper installed at a predetermined position in front of the belt conveyor in the feeding direction.
JP 10-194238 A

By the way, in the conventional packaging bag supply device described above, the packaging bag is stopped at a predetermined position by the stopper, and the packaging bag at this position is sucked by the suction means and transferred to the next station. When coming into contact, there is a case where it stops from a predetermined position, such as bounces and stops away from the stopper, or stops in a state where the tip of the bag is inclined with respect to the stopper.
If the packaging bag deviates from the predetermined position and stops, when it is transferred to the next station by the suction means, the packaging bag cannot be transferred to the predetermined position in the station.

  In view of such problems, an object of the present invention is to provide a packaging bag supply device capable of accurately transporting a packaging bag to a predetermined position set by a stopper.

According to the first aspect of the present invention, a large number of packaging bags are placed side by side on the belt conveyor so as to tilt backward in the feeding direction, and the feeding belt of the feeding device installed above the belt conveyor is fast-forwarded from the belt conveyor. A packaging bag supply device configured to convey the packaging bag in order from the column of the packaging bag to a predetermined position set by a stopper in the forward direction of the belt conveyor, and a soft friction member is provided at the tip of the piston rod. The attached piston type vibrator is attached to the housing of the feeding device so that the advancement / retraction direction of the piston rod intersects the feed direction of the belt conveyor at a predetermined angle obliquely from above and the predetermined angle can be adjusted, and comes into contact with the stopper Apply vibration along the advancing direction of the belt conveyor to the wrapped bag through the soft friction member. Characterized by being configured to.

According to the first aspect of the present invention, the soft bag is wrapped with the soft friction member because the soft bag repeatedly advances and retreats along the feeding direction of the belt conveyor from the upper side and repeats contact and separation with respect to the packing bag in contact with the stopper. The bag is subject to vibrations that push it forward in the direction of the belt conveyor. For this reason, even if the tip of the packaging bag is tilted when it comes into contact with the stopper or bounces away from the stopper, the inclination is corrected by the vibration applied from the soft friction member, or it advances until it comes into contact with the stopper. The packaging bag can always be accurately brought to the predetermined position set by the stopper.
Moreover, since the piston type vibrator is attached to the housing of the feeding device, the installation position of the feeding device and the installation position of the vibrator can be adjusted simultaneously according to the size of the packaging bag handled by the device. Moreover, since the angle of the piston can be adjusted, the packaging bag can be brought to a predetermined position by applying an appropriate vibration suitable for the type of the packaging bag.

  A large number of packaging bags are placed on the belt conveyor in a row so as to tilt backward in the feed direction, and the feeding belt of the feeding device installed above the belt conveyor is fast-forwarded from the belt conveyor and packed in order from the packaging bag in the vertical direction. A packaging bag supply device configured to convey a bag to a predetermined position set by a stopper in front of the belt conveyor in the feed direction, wherein the feeding device is fixed to the base of the belt conveyor, and the housing of the feeding device is a piston type The vibrator is attached via a soft friction member fixed to the tip of the piston rod with respect to the packaging bag in contact with the stopper with the vibrator rod attached so that the forward and backward direction of the piston rod intersects the feeding direction of the belt conveyor at an angle from above. It is configured to apply vibration along the forward direction of the conveyor. The piston type vibrator is attached to the housing of the feeding device so that the crossing angle between the advancing / retreating direction of the piston rod and the conveying direction of the belt conveyor can be adjusted.

  The present invention will be described below with reference to the drawings. FIG. 1 shows a packaging bag supply apparatus 10 according to an embodiment of the present invention. The packaging bag supply device 10 includes a belt conveyor 20, a feeding device 30, a piston vibrator 70, a first suction arm 90, and a second suction arm 95.

  The belt conveyor 20 is configured such that a plurality of string-like belts 23 are stretched around a pulley 22 attached to a base 21 and the pulley 22 is driven by a conveyor motor 24 installed at the bottom of the base 21. Stopper pieces 25 with which the packaging bag 11 conveyed by the belt 23 abuts are erected on both the left and right ends of the front end portion of the base 21.

  The feeding device 30 has a housing 31. The housing 31 is fixed to a frame 26 fixed on both the left and right sides of the base 21 by brackets 32 and is laid so as to straddle the belt 23 of the belt conveyor.

  An outline of the internal structure of the feeding device 30 is shown in FIG. A feeding motor 33 is built in the housing 31, and a main shaft of the motor 33 and a drive shaft 34 attached to the housing 31 by a bearing (not shown) are connected by a transmission belt (not shown).

  A main pulley 35 is attached to the drive shaft 34 so as to rotate integrally. The first lever 36 is assembled so as to be rotatable in the vertical direction with a support shaft 37 attached to the housing 31 concentrically with the drive shaft 34 as a fulcrum. A front pulley 39 is attached to the tip of the first lever 36 with a support shaft 38 and an intermediate pulley 41 is attached to an intermediate portion with a support shaft 40, and a transmission belt 42 is hung between the main pulley 35, the intermediate pulley 41, and the front pulley 39. Has been passed.

  A cam follower surface 43 is formed at the rear end corner of the first lever 36. On the other hand, an eccentric cam 45 is fitted to a support shaft 44 attached to the housing 31 so as to rotate integrally, and a first operation knob 46 (see FIG. 1) is provided at an end portion of the support shaft 44 that protrudes from the housing 31. It is attached. As shown in FIG. 1, a first instruction mark 47 is formed on the first operation knob 46. A first dial 48 is fixed to the outer surface of the housing 31 concentrically with the first operation knob 46.

  The first lever 36 is urged counterclockwise by its own weight with the support shaft 37 as a fulcrum, and the cam follower surface 43 is in contact with the eccentric cam 45. When the first operation knob 46 is rotated, the eccentric cam 45 rotates, the first lever 36 swings in the direction of arrow A with the support shaft 37 as a fulcrum, and the front pulley 38 moves up and down, so the belt of the belt conveyor 20 23 is adjusted. This interval can be visually recognized by the indication mark 47 of the first operation knob 46 and the first scale plate 48.

  An inverted L-shaped lever 49 is rotatably fitted on the support shaft 44a concentric with the support shaft 44, a nut member 50 is fixed to one end of the inverted L-shaped lever 49, and a connecting pin 51 is erected on the other end. Has been. On the other hand, the bolt member 53 is assembled to the housing 31 by the bearing 52 so as to be rotatable and cannot be advanced and retracted, and the inner end portion of the member 53 is screwed into the nut member 50. A second operation knob 54 is attached to the outer end portion of the bolt member 53. As shown in FIG. 3, a second scale plate 56 is fixed to the plate 55 fixed to the housing 31 concentrically with the second operation knob 54, and a second instruction mark 57 is formed on the second operation knob 54.

  The connecting pin 51 of the inverted L-shaped lever 49 is loosely fitted in an elongated hole 59 formed on the upper end side of the link lever 58. On the other hand, one end of a third lever 60 is rotatably connected to the support shaft 38 of the front pulley 39, and a rear pulley 62 is attached to the other end of the third lever 60 by a support shaft 61. A link lever 58 is connected to the support shaft 61 of the rear pulley 62, and a feeding belt 63 is stretched between the front pulley 39 and the rear pulley 62.

  When the bolt member 53 is rotated by operating the second operation knob 54, the nut member 50 advances and retreats along the bolt member 53, and the inverted L-shaped lever 49 rotates around the support shaft 44a. As a result, the link lever 58 moves up and down, and the third lever 60 rotates in the direction of arrow B with the support shaft 38 as a fulcrum, so that the rear pulley 62 moves up and down and the distance between the belt conveyor 20 and the belt 23 is adjusted. The This interval can be confirmed by the indication mark 57 of the second operation knob 54 and the second scale plate 56.

  The structure of the feeding device is as described above. When the feeding motor 33 is started, the drive shaft 34 rotates, the transmission belt 42 travels, the front pulley 39 rotates, and further, the feeding belt 63 travels and the rear pulley 62 moves. Rotate. The feeding belt 63 is set to run faster than the belt 23 of the belt conveyor 21.

  As shown in FIGS. 1 and 4, a friction member 72 made of a soft plastic is fixed to the tip of the piston rod 71 of the piston vibrator 70, and a balance weight 73 is fixed to the rear end. The front end surface of the cylinder 74 of the piston vibrator 70 is fixed to the plate 75, and a pair of left and right support shafts 76 are fixed to the plate 75. Each support shaft 76 is slidably inserted into the bearing block 77. Coil springs 78 and 79 are attached to each support shaft 76 so as to sandwich the bearing block 77. Each bearing block 77 is fixed to the frame 81 by inserting a mounting shaft 80 fixed integrally therewith into a mounting hole 82 with a slit formed in the front end portion of the frame 81, and fastening with a bolt 83. Each frame 81 is fixed to the support bar 84 by inserting a support bar 84 through a mounting hole with a slit formed at the rear end thereof, and tightening it with a bolt 85. An end portion of the support bar 84 is fitted into a long hole 88 of a bracket 87 fixed to the housing 31 of the feeding device 30 with a bolt 86, and is fastened with a bolt 89 to be fixed to the bracket 87.

  The mounting structure of the piston-type vibrator 70 to the housing 31 of the feeding device 30 is as described above. The piston-type vibrator 70 is installed above the belt 23 of the belt conveyor 20, and the advancing / retreating direction of the piston rod 71 is the feeding direction of the belt conveyor 20. On the other hand, the soft friction member 72 crosses at a predetermined angle obliquely from above, and is disposed so as to advance and retreat in the feeding direction of the belt conveyor 20 in front of the feeding belt 63. The crossing angle of the piston rod 71 with the belt 23 of the belt conveyor 20 and the interval between the soft friction member 72 and the belt 23 are rotated by a required angle with respect to the vibrator 70 with respect to the frame 81 with the mounting shaft 80 as a fulcrum. The frame 81 is rotated at a required angle with respect to the bracket 87 with the support bar 84 as a fulcrum, or the support bar 84 is moved up and down along the elongated hole 88 by a required dimension and tightened with bolts 82, 85, 89. And is adjusted by fixing the vertical position. When pressurized air is supplied to the piston-type vibrator 70 thus adjusted in position, the soft friction member 72 vibrates in the direction of the arrow C and repeatedly comes into contact with and leaves the packaging bag 11 on the belt conveyor 20, and the packaging bag 11 faces the stopper 25. Pushed away.

  The first suction arm 90 is assembled to the base 21 with a bracket 92 so as to rotate in the vertical direction with the support shaft 91 as a fulcrum. A first suction cup 93 is attached to the tip of the first suction arm 90, and an actuator 94 is connected to the intermediate portion. The first suction arm 90 is rotated by the actuator 94 to suck the packaging bag 11 that is stopped by contacting the stopper 25 at a position indicated by a two-dot chain line, and lifts the packaging bag 11 to a position indicated by a solid line.

  The second suction arm 95 rotates in the vertical direction with a support shaft 96 installed above the belt conveyor 20 as a fulcrum. A second suction cup 97 is attached to the tip of the second suction arm 95, and the packaging bag 11 sucked by the first suction cup 93 is sucked and received at a position indicated by a two-dot chain line, and this is indicated by a solid line. It is lifted, pinched by a grip (not shown) from this position, and transferred to the next step.

  The structure of the packaging bag supply apparatus 10 according to the present embodiment is as described above, and the operation will be described with reference to FIGS. The packaging bags 11 are placed side by side on the belt 23 of the belt conveyor 20 in a rearwardly tilted column, and the motor 24 of the belt conveyor 20 and the motor 33 of the feeding apparatus are activated to test the packaging bag 11. Feed. The entire column of the packaging bags 11 is fed to the feeding device 30 by the belt 23, the feeding belt 63 is brought into sliding contact with the packaging bag 11 at the top of the column, and the leading packaging bag 11 is fed out. Is rotated from the front pulley 38 and the belt 23 by rotating the first operation knob 46 according to the type of the packaging bag 11 to be separated from the subsequent packaging bag 11 and fed one by one from the front pulley 38. While adjusting the interval, the second operation knob 54 is rotated to adjust the interval between the rear pulley 62 and the belt 63.

  After adjusting the pulleys 38 and 62, the belt conveyor 20, the feeding device 30, and the piston vibrator 70 are operated. The packaging bag 11 fed out from the front pulley 38 is conveyed to a position where it comes into contact with the stopper 25. When the packaging bag 11 comes into contact with the stopper 25, this is detected by a limit switch (not shown), and the feeding motor 33 is stopped. Next, the packaging bag 11 is sucked by the first suction arm 90 and transferred from the belt conveyor 20 to the delivery position to the second suction arm 95. And it adsorb | sucks by the 2nd adsorption | suction arm 95 in a delivery position, and transfers to the delivery position to a grip. During this time, when the transfer by the first suction arm 90 is completed, the feeding motor 33 is restarted and the subsequent packaging bag 11 is conveyed to a position where it abuts against the stopper 25.

  When the packaging bag 11 is fed out from the feeding belt 63, conveyed by the belt conveyor 20 and abuts against the stopper 25, the tip end portion of the packaging bag 11 is inclined with respect to the stopper 25 as shown by a two-dot chain line in FIG. 6. State, that is, only one side of the tip is in contact with one stopper 25 and the other side is stopped from the stopper 25, or, as shown in FIG. May stop in a distant state. However, since the vibration is applied to the packaging bag 11 by the soft friction member 72 of the piston vibrator 70 and this vibration is applied only in one direction along the conveying direction of the belt conveyor 20, the inclined state and the rebound state of the packaging bag 11 are instantaneous. As shown by the solid line, the packaging bag is brought to a predetermined position where both sides of the tip end part abut against the stopper 25.

It is a front view which shows the whole structure of the packaging bag supply apparatus which concerns on one Example of this invention. It is the partially broken front view which shows the internal structure of the drawing | feeding-out apparatus of the packaging bag supply apparatus. It is a rear view which shows the plate of the delivery apparatus. It is a top view which shows the piston type vibrator of the packaging bag supply apparatus. It is explanatory drawing of the action | operation of the packaging bag supply apparatus. It is explanatory drawing of an action | operation of the piston type vibrator of the packaging bag supply apparatus. It is operation | movement explanatory drawing of the same piston type vibrator.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Packaging bag supply apparatus, 11 ... Packaging bag, 20 ... Belt conveyor, 22 ... Belt of belt conveyor, 25 ... Stopper, 30 ... Feeding device, 38 ... Front pulley, 63 ... Rear pulley, 63 ... Feeding belt, 46 ... First 1 operation knob, 47 ... 1st indication mark, 48 ... 1st scale plate, 55 ... 2nd operation knob, 56 ... 2nd scale plate, 57 ... 2nd indication mark, 70 ... piston type vibrator, 71 ... piston rod, 72: soft friction member, 74: cylinder, 81: frame, 87: bracket.

Claims (1)

A large number of packaging bags are placed on the belt conveyor in a row so as to tilt backward in the feed direction, and the feeding belt of the feeding device installed above the belt conveyor is fast-forwarded from the belt conveyor and packed in order from the packaging bag in the vertical direction. A packaging bag supply device configured to convey a bag to a predetermined position set by a stopper in front of a belt conveyor in a feeding direction, wherein a piston type vibrator having a soft friction member attached to a tip portion of a piston rod is connected to the piston rod. The soft friction member is attached to the housing of the feeding device so that the advance and retreat direction of the belt intersects the feeding direction of the belt conveyor from an oblique upper side at a predetermined angle and the predetermined angle can be adjusted. It is configured to apply vibration along the forward direction of the belt conveyor via Packaging bag supply apparatus that.

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