JP6463108B2 - Bag feeder - Google Patents

Description

  The present invention relates to a bag feeding device that takes out a single bag from a magazine that stores a plurality of bags and supplies it to the next process.

  A conventional bag supply apparatus takes out a plurality of bags stored in a magazine one by one and is mounted on an automatic packaging apparatus. Further, the bag taken out by this bag feeder is opened in the next step, and when a desired part is put in, the opening is thermally welded and discharged from the automatic packaging device. A conventional bag feeder is disclosed in Patent Document 1, a magazine capable of storing a plurality of the bags stacked, a suction pad for sucking the bottom bag of the magazine by air suction, and the suction pad in a vertical direction. And a bag take-out means which can turn 90 degrees. The magazine includes a frame body that surrounds the four sides of the bag, and a plurality of bag locking claws that are arranged on the lower surface of the frame body so as to extend inward of the frame body. Further, since a plurality of the bag locking claws are arranged so as to support the four sides of the lowest bag stored in the magazine, the bags in the magazine remain in the magazine by the bag locking claws and are always magazines. There will be no falling down.

  Next, the operation of the conventional bag feeder will be described. The suction pad ascends in the vertical direction by the operation of the bag take-out means and approaches the lowest bag in the magazine. At this time, since the suction pad is sucking air, it comes into contact with the lower surface of the bag and sucks the bag. Subsequently, the suction pad is lowered in the vertical direction by the return of the bag take-out means, and the sucked bag is separated from the bag locking claw and transferred to the lower side of the magazine. Thereafter, the suction pad is turned 90 degrees by the turning of the bag take-out means, and the bag is supplied to the next process.

Japanese Unexamined Patent Publication No. 2000-142630

  However, in the conventional bag supply device, when the bag stacked and stored as described above is taken out of the magazine, the suction pad will adsorb only one side of the bag, so the opening of the bag adsorbed to this is not When the suction pad is lowered, it may open slightly. Therefore, there is a problem that the bag latching claw easily enters the slightly opened bag, the bag opening claw is caught by the bag latching claw, and the bag is detached from the suction pad. Moreover, since the conventional bag supply apparatus has accommodated the bag in a magazine, the bags are easily brought into close contact with each other. As a result, there is a problem that a plurality of sheets are taken out without taking out only the bag located at the lowest position of the magazine.

The present invention has been made in view of the above problems, and is a magazine that can store a plurality of rectangular bags with one side open in the thickness direction, and a lowermost position in the magazine from the bottom of the magazine. A bag feeding device comprising: a reciprocating means capable of reciprocating in a direction approaching or separating from the bag to be separated; and a suction pad arranged on the reciprocating means and capable of adsorbing the bag. The magazine has a main body having an inner wall extending in the thickness direction of the bag so as to guide three sides other than the opening side of the bag accommodated in the magazine, and one side on the opening side of the bag arranged in the main body. An opening guide that extends in the thickness direction of the bag so as to guide the bag, and a bottom plate that is fixed to the lower portion of the main body and supports the bag, and the bottom plate corresponds to both ends of the opening of the bag stored in the bag. Notch Become formed, said opening guide has a vent port consisting shorter width dimension than the side of the opening side of the bag is disposed in its lower central position opposed to the opening guide arranged thereunder both ends made and a said engaging pawl extending toward the inner wall of said suction pad is provided with a conical recess in one end thereof, disposed to face the inner wall of the body which is the recess adjacent to the notch the It is arranged to be inclined with respect to the bottom plate. In the bag supply apparatus according to the present invention, the main body includes a long hole whose position can be adjusted in the thickness direction of the bag, and the opening guide has the locking claw on the upper side of the upper surface of the bottom plate. It is preferable that it is fixed to the main body so as to be located at the position.

  Since the bag feeding device of the present invention is arranged so that the suction pad is inclined with respect to the bottom plate supporting the bag, when the bag sucked on the suction pad is viewed from the opening guide side, the opening of the bag is Curved in an inverted U-shaped arc with both ends on the bottom and the middle near the top. Thus, when the bag curves in an inverted U shape, tension is generated in the direction in which the opening extends, that is, in the width direction of the bag. Therefore, since the bag in the curved state can be easily kept in a closed state and is difficult to open, the bag supply apparatus of the present invention has an advantage that it is difficult to hook the opening on the locking claw when the bag is taken out. Further, since the bag feeding device of the present invention can be adjusted so that the locking claw is positioned above the upper surface of the bottom plate, the bag stored in the magazine has both ends of the opening up and the middle near down. Curved in a U-shaped arc. On the other hand, the bag adsorbed to the suction pad is curved in an inverted U shape as described above. Therefore, since the bags that overlap in the magazine are curved in different directions, they are reliably pulled apart. Therefore, the bag supply apparatus of the present invention has an advantage that it is possible to reduce the problem of taking out a plurality of bags from the magazine as in the prior art.

It is a partially notched perspective view which concerns on the bag supply apparatus of this invention. It is a partially notched perspective view which shows the operation state which concerns on the bag supply apparatus of this invention. It is a principal part top view which concerns on the bag supply apparatus of this invention. It is operation | movement explanatory drawing which concerns on the bag supply apparatus of this invention, (a) is a front view which shows the positional relationship of the suction pad and magazine in an original position, (b) is a principal part right view of (a). is there. It is operation | movement explanatory drawing which concerns on the bag supply apparatus of this invention. It is operation | movement explanatory drawing which concerns on the bag supply apparatus of this invention, (a) is a front view which shows the positional relationship of a suction pad and a magazine at the time of pulling out a bag below, (b) is the principal part of (a). It is a right view. It is operation | movement explanatory drawing which concerns on the bag supply apparatus of this invention. It is operation | movement explanatory drawing which concerns on the bag supply apparatus of this invention. It is operation | movement explanatory drawing which concerns on the bag supply apparatus of this invention. It is operation | movement explanatory drawing which concerns on the bag supply apparatus of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. The bag feeding apparatus 1 of the present invention includes a magazine 10 that can store a plurality of rectangular bags W that are open on only one side, and suction pads 20 and 21 that can suck one side of the bag W. 21 is provided with reciprocating means 30 which can be reciprocated so as to approach 21 from below the magazine 10 into the magazine 10 or to move away from the magazine 10 to below the magazine 10.

  The said bag W consists of a resin-made transparent film, and is formed in the rectangle which made the outer periphery the 2 sides of a short side, and 2 sides of a long side. The bag W is formed by folding the transparent film, and two sides adjacent to the folded side are sealed in advance by heat welding or the like. Accordingly, since the bag W includes the opening Wa that one side of the bag W opens, it is possible to input a component or the like from the opening Wa. Further, the bag W is configured such that one side of the short side is opened, and a plurality of bags W are stacked in advance in the thickness direction by an operator (not shown), and the openings Wa of all the bags W are formed. Are aligned in the same direction and stored in a magazine 10 described later.

  The magazine 10 is fixed to a magazine 11 fixed to the lower part of the main body 11, a main body 11 surrounding three sides other than the opening Wa of the bag W accommodated therein, an opening guide 12 surrounding the side of the bag W on the opening Wa side. 10 and a bottom plate 13 that forms the bottom portion.

  The main body 11 is formed by bending a thin plate and includes three inner walls 11a, 11b, and 11c extending in the thickness direction of the bag W to be stored, and the inner wall 11a, It is comprised so that it may guide by 11b and 11c. Further, out of these three inner walls 11a, 11b, and 11c, the two opposing inner walls 11a and 11c have elongated holes 15 and 15 for adjusting the mounting height of the opening guide 12 to be described later and screwing them, and to be described later. A pilot hole (not shown) for screwing the bottom plate 13 to be screwed is provided, and the elongated holes 15 are formed so as to extend in the thickness direction of the bag W. Further, the main body 11 is fixed to a main body frame (not shown).

  As shown in FIG. 1, the opening guide 12 extends in the thickness direction of the bag W, a guide surface 12a disposed on the opening Wa side of the bag W, and an opening 12b formed in the lower center of the guide surface 12a. A mounting surface provided with two locking claws 12c and 12d disposed at the lower portion of the guide surface 12a so as to sandwich the opening 12b, and female screws 16 respectively corresponding to the four long holes 15 disposed in the main body. 12e and 12f.

  The opening 12b is formed in a U-shape with the bottom opened when the guide surface 12a is viewed from the front, and the width dimension is set shorter than the side of the bag W on the opening Wa side, The height dimension is set to be higher than the thickness of the bag W.

  The locking claws 12c and 12d are arranged on the lower surface of the guide surface 12a, and are configured to protrude perpendicular to the guide surface 12a and toward the inner wall 11b. The two locking claws 12c and 12d are arranged at the same distance as the width dimension of the outlet 12b, and the protruding length is set to about 2 mm. That is, the width dimension of the opening 12b is determined by these two locking claws 12c and 12d.

  The mounting surfaces 12e and 12f are arranged on both side surfaces of the guide surface 12a, and are configured to be orthogonal to the guide surface 12a and extend forward along the inner walls 11a and 11c of the main body 11. A female screw 16 corresponding to the long hole 15 is provided.

  The bottom plate 13 extends from the lower portion of the inner wall 11b facing the guide surface 12a toward the opening guide 12, passes through the outlet 12b, and protrudes forward of the opening guide 12. The bottom plate 13 has a second support portion 13b having a width dimension substantially the same as the width of the bag W, a first support portion 13a having a dimension shorter than the width dimension of the outlet 12b, And an attachment portion 13c that is orthogonal to the upper surface of the support portion 13b and extends downward.

  The second support portion 13b is formed from the lower portion of the inner wall 11b facing the guide surface 12a to the middle in the longitudinal direction of the bag W stored in the magazine 10, while the first support portion 13a is formed in the longitudinal direction of the bag W. It is formed so as to extend from the middle of the direction toward the opening guide 12 with the width narrowed from the second support portion 13b and project from the outlet 12b.

  The attachment portions 13c are respectively arranged on both side surfaces of the second support portion 13b, and extend downward along two inner walls 11a and 11c that are orthogonal to the upper surface of the second support portion 13b and face the main body 11. It is configured as follows. The mounting portion 13c is configured in the same manner as the mounting surfaces 12e and 12f of the opening guide 12, and includes female screws 17 and 17 corresponding to the pilot holes of the main body 11, respectively.

  Here, attachment of the bottom plate 13 and the opening guide 12 to the main body 11 will be described. The bottom plate 13 is fixed to the main body 11 by screwing the female screw 17 of the mounting portion 13 c with the prepared hole of the main body 11. On the other hand, the opening guide 12 has the female threads 16 of the mounting surfaces 12e and 12f aligned with the elongated holes 15 of the main body 11, and the upper surfaces of the locking claws 12c and 12d and the bottom plate 13 as shown in FIGS. A screw is fixed at a position where the upper surface of the main body 11 is substantially the same height and is fixed to the main body 11.

  By the way, since the elongated hole 15 of the main body 11 is configured to extend in the thickness direction of the bag W as described above, the mounting height of the opening guide 12 can be adjusted. The position adjustable range is such that the upper surface of the aforementioned locking claws 12c, 12d can be adjusted 5mm above the upper surface of the bottom plate 13 from at least a height (0 mm) substantially equal to the upper surface of the bottom plate 13. Is set to

  Since the magazine 10 configured as described above includes the bottom plate 13 having a narrow width as described above, two notches N1 and N2 communicating with the lower portion are formed in the bottom of the magazine 10, respectively. Although the notches N1 and N2 are formed in the bottom of the magazine 10 in this way, the bag W stored in the magazine 10 is always supported by the bottom plate 13 and the locking claws 12c and 12d. , Do not fall down.

  The suction pads 20 and 21 are made of a cylindrical resin material, and are provided with mortar-shaped recesses 20a and 21a at at least one end. Further, the suction pads 20 and 21 are arranged in a reciprocating means 30 described later, and are arranged so that two of them are arranged at an interval similar to the arrangement interval of the locking claws 12c and 12d. Further, the suction pads 20, 21 are inclined with respect to the recesses 20a, 21a from below the magazine 10 toward the notches N1, N2 and toward the inner walls 11a, 11c adjacent to the recesses 20a, 21a. It is arranged to do. The suction pads 20 and 21 are provided with vent holes 20b and 21b penetrating from the recesses 20a and 21a to the other end side, and the vent holes 20b and 21b are connected to an air suction means (not shown). Yes. Therefore, the suction pads 20 and 21 are configured so that air can be appropriately sucked from the recesses 20a and 21a side by the operation of the air suction means.

  The reciprocating means 30 is disposed below the magazine 10 and has a plate 31 that extends along the bottom plate 13 and a shaft that is disposed on the upper front side of the plate 31 so as to be orthogonal to the direction in which the plate 31 extends. 32, and a rocking link 35 connected to the rear portion of the lower surface of the plate 31 and reciprocally turning the plate 31 about the axis of the shaft 32 by a predetermined angle.

  The plate 31 is a flat plate extending along the longitudinal direction of the bottom plate 13, and the width dimension is set to be about the width of the bag W. In addition, brackets 33 and 33 for supporting the shaft 32 rotatably are fixed to the front part of the upper surface of the plate 31, respectively, and the suction pads 20 and 21 are arranged on the rear part of the upper surface side. A female screw 31a is disposed at the rear of the plate 31, and one end of the swing link 35 is attached to the female screw 31a.

  The swing link 35 includes a rod 36 that can be screwed into the female screw 31a of the plate 31 and an arm 37 that rotatably supports the rod 36.

  The rod 36 includes a screw at one end and a mounting bolt 38 perpendicular to the extending direction of the rod 36 at the other end.

  The arm 37 is configured such that the mounting bolt 38 is attached to one end side of the arm 37 and rotatably supports the rod 36, and a rotating shaft 39 is rotatably attached to the other end side. The rotating shaft 39 is inserted into blocks 39a and 39b fixed to the main body frame, and the arm 37 is configured to be pivotable about the axis of the rotating shaft 39. Further, the arm 37 is in contact with a cam (not shown) that is driven to rotate, and the arm 37 is configured to reciprocate by a predetermined angle when the cam rotates once. Therefore, the swing link 35 reciprocates the plate 31 connected thereto by a predetermined angle by the rotational drive of the cam, and the plate 31 rotates clockwise and counterclockwise around the shaft 32, respectively. Turn a predetermined angle and swing back and forth.

  The plate 31 is provided with a slider 40 including two guide shafts 41 and 41 arranged along the extending direction and a movable portion 42 slidable in the extending direction of the guide shafts 41 and 41. ing.

  The slider 40 includes the movable portion 42 inserted through two guide shafts 41 and 41, and fixed plates 43 and 43 that support both ends of the guide shafts 41 and 41, respectively. The plate 31 is configured to be slidable from the rear end side to the front end side or from the front end side to the rear end side. In addition, two suction pads 20 and 21 are arranged side by side on the upper surface of the movable portion 42, and the recesses 20a and 21a are arranged to face upward. Further, the movable portion 42 includes a vent hole (not shown) that communicates with the vent holes 20b and 21b of the suction pads 20 and 21, respectively, and the vent hole is provided on a side surface of the movable portion 42. 44 is configured to communicate with 44. The joint 44 is connected with the air suction means. Thereby, the two suction pads 20 and 21 can perform air suction simultaneously. Further, a cam follower 45 is rotatably disposed on the side surface of the movable portion 42, and the cam follower 45 is connected to a slide link 50 described later.

  The sliding link 50 includes a shaft 52 that extends from the lower side to the upper side of the magazine 10 and is inserted into one end side thereof, and a groove 51 that is disposed on the other end side. The shaft 52 is disposed in parallel with the direction in which the shaft 32 extends, is offset downward from the shaft 32, and is fixed to the main body frame. On the other hand, the width of the groove 51 and the cam follower 45 are set to be approximately equal to the diameter, and the cam follower 45 is always engaged and connected to the movable portion 42. Further, the sliding link 50 is in contact with a cam (not shown) that is rotationally driven in the same manner as the swing link 35 described above, and the sliding link 50 is attached to the plate 31 by one rotation of the cam. The side is reciprocally swung by a predetermined angle. Therefore, the sliding link 50 reciprocally swings with the shaft 52 as a fulcrum so that the movable portion 42 can reciprocate. As a result, if the sliding link 50 swings toward the shaft 32, the cam follower 45 is positioned above the groove 51 in accordance with the swing, and the suction pads 20, 21 move toward the shaft 32. Move forward.

  Next, the operation of the bag feeder 1 of the present invention will be described. By operating each of the air suction means and the swing link 35, the suction pads 20 and 21 turn clockwise with the shaft 32 as a fulcrum until the suction pads 20 and 21 change from the state of FIG. 4 to the state of FIG. The cutouts N1 and N2 are approached from below the bottom plate 13. Further, the plate 31 swung together with the suction pads 20 and 21 swivels to a position that is substantially parallel to the upper surface of the bottom plate 13, and the suction pads 20 and 21 pass through the notches N1 and N2 and the magazine 10. Enter inside. As a result, the suction pads 20, 21 are in contact with the lower surface of the bag W located at the lowest position of the magazine 10 and suck the bag W.

  Subsequently, as shown in FIG. 6A, the swing link 35 operates in the reverse direction. As a result, the suction pads 20 and 21 turn counterclockwise around the shaft 32, and turn so as to pass through the notches N1 and N2 and downward in the magazine 10. At this time, the movement trajectories of the suction pads 20 and 21 form an arc in a diagonally downward direction, and when the concave portions 20a and 21a are positioned below the lower surface of the first support portion 13a, the swing of the swing link 35 is stopped. .

  At this time, both ends on the opening Wa side of the sucked bag W pass through the notches N1 and N2 as shown in FIG. 6B, but the vicinity of the center on the opening Wa side is the same as before the suction. It is supported by the first support portion 13a. Further, as described above, since the suction pads 20 and 21 are inclined toward the inner walls 11a and 11c adjacent to each other, the bag W drawn downward is inverted U-shaped when viewed from the opening Wa side. It becomes warped and curved. Therefore, the bag W is easy to be released from the close contact state with the next bag W that overlaps the bag W, and it is difficult to take out a plurality of the bags. In addition, since the bag W is curved in an inverted U shape and pulled downward in this manner, the opening Wa is less likely to be opened than when it is in a horizontal state. Therefore, when the bag W is pulled downward, it is unlikely that the bag W is opened and hooked on the locking claws 12c and 12d as in the conventional case.

  Next, as shown in FIG. 7, the movable portion 42 slides along the guide shafts 41 and 41 toward the shaft 32 side by receiving the operation of the sliding link 50. Thereby, the suction pads 20 and 21 pass under the locking claws 12c and 12d in a state where the bag W is sucked and move to the front of the opening guide 12. At this time, the bag W is transferred to the front end side of the first support portion 13a through the bottom of the locking claws 12c and 12d while passing through the outlet 12b while being supported on the upper surface of the bottom plate 13. The When the suction pads 20 and 21 are moved to the front side of the opening guide 12, the swing link 35 is actuated again as shown in FIG. As a result, the suction pads 20 and 21 pivot upward about the shaft 32 and move upward. At this time, the swing link 35 turns and stops to a position where the plate 31 is substantially parallel to the upper surface of the bottom plate 13. As a result, the bag W is pulled out to the position away from the opening 12b of the magazine 10 to the front, and is continuously sucked by the suction pads 20 and 21. At this time, the chuck 60 of the next process is moved to receive the bag W, and the chuck 60 is opened and is waiting on the opening Wa side of the bag W.

  Next, as shown in FIG. 9, the chuck 60 performs a closing operation to sandwich both ends of the opening Wa of the bag W. In response to this, the air suction of the air suction device stops and the suction of the bag W is stopped. Thereafter, as shown in FIG. 10, the bag 60 held by the chuck 60 is transferred to the next process. Thereafter, the sliding link 50 returns to the position shown in FIG. 4 and slides the movable portion 42 to the original position. As a result, the suction pads 20 and 21 move to below the notches N1 and N2 and return to their original positions.

  In the present embodiment, the height adjustment of the opening guide 12 is set by the elongated hole 15 so that the upper surfaces of the locking claws 12c and 12d and the upper surface of the bottom plate 13 are substantially equal in height. The opening guide 12 may be positioned upward depending on the width or material of the bag W to be used. As a result, the bag W stored in the magazine 10 is adsorbed by the suction pads 20 and 21 because both ends of the bag W on the opening Wa side are high and the vicinity of the center of the bag W on the opening Wa side is supported low. Each of the bags W is warped in the opposite direction and has a U-shaped curved shape. Therefore, since the bag W adsorbed by the suction pads 20 and 21 and the next bag W stored in the magazine 10 are warped in opposite directions, the close contact state between the bags is more easily released. Therefore, the problem of taking out a plurality of bags W becomes even less likely to occur.

DESCRIPTION OF SYMBOLS 1 Bag feeder 10 Magazine 11 Main body 11a Inner wall 11b Inner wall 11c Inner wall 12 Opening guide 12a Guide surface 12b Exit 12c Locking claw 12d Locking claw 13 Bottom plate 13a First support part 13b Second support part 15 Slot 20 Adsorption pad 20a Recess 21 Adsorption pad 21a Recess 30 Reciprocating means 35 Swing link 40 Slider 50 Sliding link 60 Chuck N1 Notch N2 Notch W Bag Wa Opening

Claims (2)

A magazine that can store a plurality of bags with one rectangular side open in the thickness direction, and a reciprocating movement that can be reciprocated from the bottom of the magazine toward or away from the lowest bag in the magazine. Means and a suction pad arranged in the reciprocating means and capable of sucking the bag, wherein the bag is taken out from below the magazine.
The magazine has a main body having an inner wall extending in the thickness direction of the bag so as to guide three sides other than the opening side of the bag accommodated therein, and guides one side on the opening side of the bag arranged in the main body. An opening guide extending in the thickness direction of the bag, and a bottom plate fixed to the lower part of the main body and supporting the bag ,
The bottom plate is formed by forming notches at positions corresponding to both ends of the opening of the bag housed therein,
The opening guide is arranged in the lower center of the bag and has a width that is shorter than the opening side of the bag, and toward the inner wall at a position opposite to the opening guide that is arranged on both lower ends of the opening guide. made and a locking claw extending,
The suction pad has a mortar-shaped recess at one end thereof, and the recess is arranged so as to face the inner wall of the main body adjacent to the notch, and is arranged to be inclined with respect to the bottom plate. Bag feeder. The main body comprises an elongated hole whose position can be adjusted in the thickness direction of the bag.
The bag opening device according to claim 1, wherein the opening guide is fixed to the main body so that the locking claw is positioned above the upper surface of the bottom plate.

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