JP5956858B2 - Packaging machine - Google Patents

Description

  The present invention relates to a packaging machine that takes out a bag made of synthetic resin one by one, puts so-called parts into the bag, and then thermally welds the bag.

  As a conventional packaging machine, the one shown in Patent Document 1 is publicly known, a storage unit that can store a large number of bags made of a resin material, an adsorption unit that can adsorb the vicinity of the center of the bag, and the adsorption unit And an opening means for opening an upper portion of the bag. The bag is formed by folding a thin sheet made of a transparent material into a folding rectangle, and the bottom and sides are already heat-sealed so that only one side of the bag is open. A large number of the bags are stacked, and are stored in the storage section so that all the opening portions face upward. The storage portion is formed in a U-shape, and is arranged so that the U-shaped opening is directed upward, while the bottom of the U-shape has a punch hole having a slightly smaller area than the rectangular shape of the bag Is formed. The suction means includes a suction cup for sucking the bag, and is attached to a transfer means that can move in the front-rear and left-right directions. The transfer means includes a first transfer means capable of reciprocating the suction means in the left-right direction, and a second transfer means capable of reciprocating the suction means in the front-rear direction. Can be moved to a predetermined position. The opening means includes two opposing holding members that can be expanded and contracted, and a vacuum pad that adsorbs the bag and a heat ray that emits high heat when instantaneously energized, respectively. It is arranged, and is configured to be capable of heat-welding by holding the opening of the bag.

  Next, the operation of the conventional packaging machine will be described. The suction means is transferred forward by the transfer means, and the suction cup sucks one bag stored in the storage portion from the punched hole. Thereafter, the suction means is retracted by driving the transfer means, and then the bag is conveyed to the opening means in the expanded state while being sucked. After being conveyed, after the adsorbing means has advanced, the opening means constricts the pinching member to pinch the bag and adsorbs the upper portion of the bag from both sides by the vacuum pad. When this suction is completed, the suction means moves backward and the opening means opens the holding member to open the upper end of the bag. After that, when a so-called part is put into the opened bag, the opening means shrinks the holding member to hold the upper part of the bag, and heat-welds the upper part of the bag held by the heat ray. The packaging of the parts is completed.

Japanese Patent Application No. 2012-33321

  When taking out the bag from the storage unit, the suction means sucks the vicinity of the center of the bag, and therefore when the sucked bag is transported to the holding member of the opening means, the four corners of the bag are greatly expanded. End up. As a result, the portion of the bag that is not adsorbed is conveyed to the opening means while being deformed to be warped, and the upper portion of the deformed bag interferes with the side surface of the holding member that is the entrance of the opening means. As the conveyance further proceeds, the bag is conveyed along the bag to the opening means, so that the conventional packaging machine cannot suck the upper part of the bag by the vacuum pad, and the suction of the opening means frequently occurs. There was a problem that occurred. Further, as described above, when the upper portion of the bag is conveyed while interfering with the side surface of the holding member, the suction means slides to the lower side of the opening means. There was also a problem that the bag was pulled apart and dropped.

The present invention has been made in view of the above problems, and is a packaging machine capable of reliably transporting an adsorbed bag to a predetermined position without greatly deforming the vicinity of the opening of the bag even if it is transferred in the horizontal direction. The purpose is to provide. In order to achieve this object, the present invention provides a bag stocker (10) in which a large number of planar bags (5) each having an opening on the upper surface thereof, and a bag stocker (10) that can move in the front-rear direction and that can move in the front-rear direction. The take-out means (20) for adsorbing one bag (5), the reciprocating means (30) capable of reciprocating the take-out means (20) in the horizontal direction, and the bag (5) conveyed in the horizontal direction. A packaging machine comprising two holding members (41, 42) for holding the upper part and adsorbing both surfaces of the bag (5) and opening means (40) each having a heat ray (43) that generates heat when energized. The guide plate (51, 52) is disposed on the side of the holding member (41, 42), and the inclined surface (51a, 52a) is formed on the guide plate (51, 52) to be adsorbed. bags (5) comprises a structure for guiding the holding member to the (41, 42) The fixing plate (60) extending along the conveyance path of the bag (5) is arranged between the holding members (41, 42) in an expanded state, and these holding members (41, 42) and the take-out It is arranged below the means (20) .

  In the packaging machine 1 of the present invention, since the guide plates 51 and 52 are arranged on the sides of the holding members 41 and 42, the bag 5 adsorbed by the take-out means 20 is warped. The warp of the bag is corrected by the guide plates 51 and 52. Thereby, since the upper part of the bag 5 is conveyed to the opening means 40 without abnormally deforming the upper part, the opening means 40 can adsorb the upper part of the bag 5 and can open the bag 5 reliably. That is, since the packaging machine 1 of the present invention can reliably open the bag 5 as compared with the prior art, there is an advantage that the occurrence of abnormal adsorption of the opening means 40 can be reduced. In addition, since the packaging machine 1 of the present invention is arranged so as to cover the side surfaces of the holding members 41 and 42 by the guide plates 51 and 52, the bag 5 is pulled away from the suction cup 22 as in the prior art and dropped. There is also an advantage that such problems can be reduced.

  In addition, since the packaging machine 1 of the present invention guides along the lower part of the bag 5 by the fixing plate 60, it is possible to regulate the warp generated in the lower part of the bag 5. Even if the upper part of the bag 5 is warped, the warp of the upper part tends to be reduced by reducing the warp of the lower part as described above. For this reason, the warp generated in the upper portion of the bag 5 is smaller than that when the fixing plate 60 is not installed. Therefore, since the packaging machine 1 of the present invention is provided with the fixing plate 60, there is an advantage that the occurrence of warpage occurring in the upper portion of the bag 5 can be suppressed as compared with the conventional case.

It is a perspective view of one example concerning the present invention. It is a schematic explanatory drawing which shows the principal part of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The packaging machine 1 of the present invention includes a bag stocker 10 that can store a large number of bags 5 made of a resin material, a take-out means 20 that can adsorb the bags 5, a reciprocating means 30 equipped with the take-out means 20, An opening means 40 for opening the upper portion of the bag 5, an input chute 65 for guiding a desired part (not shown) into the opened bag 5, and a heat wire 43 for welding the opened portion of the bag 5. Prepare.

  The bag 5 is formed by folding a thin sheet made of a transparent material into a rectangular shape, and the bottom and sides are already heat-welded so that only one side of the bag 5 is open. A large number of the bags 5 are stacked, and are stored in the bag stocker 10 so that all the opening portions face upward.

  The bag stocker 10 is formed in a U-shape and is arranged so that the opening of the U-shape faces upward, while the bottom of the U-shape has a slightly smaller area than the rectangle of the bag 5. A punch hole 11 is formed.

  The take-out means 20 is attached to a reciprocating means 30 to be described later, and includes a suction cup 22 having a suction surface for sucking the bag 5, a contact bolt 24 disposed on the upper rear side of the suction cup 22, A stay 23 having a bolt 24, a movable block 21 to which the suction cup 22 and the stay 23 are respectively fixed, and a rectilinear drive source 25 capable of reciprocatingly moving the movable block 21 in the front-rear direction. The suction cup 22 is provided with a vent hole (not shown) over its entire length. The vent hole is connected to the suction surface and a connection hole (not shown) provided in the movable block 21. Are arranged to communicate. Further, the vent hole and the connection hole are connected to a vacuum pump or an ejector which is an example of a vacuum source (not shown).

  The reciprocating means 30 is provided with a plate-like movable part 31, and the take-out means 20 is loaded on the movable part 31. Further, the movable portion 31 is configured to be reciprocally movable in the horizontal direction, and by this reciprocation, the take-out means 20 is transferred to the front of the bag stocker 10 or below the opening means 40 described later.

  The opening means 40 includes a sliding block 41 and a fixed block 42 which are the holding members, and the sliding block 41 has sliding pads 41a and 41a adsorbed on the upper portion of the bag 5, respectively. On the other hand, fixed pads 42a and 42a are arranged on the fixed block 42 so as to face the sliding pads 41a and 41a. Two shafts 44 and 44 are attached to the sliding block 41, and these shafts 44 and 44 are arranged above the sliding pads 41a and 41a. Ball bushes 45, 45 through which the two shafts 44, 44 are inserted are fixed to the fixed block 42. Since these ball bushes 45, 45 are slightly inclined, the slide block 41 is , Retreating with its own weight. That is, since the sliding pads 41a and 41a are always separated from the fixed pads 42a and 42a by a predetermined distance, the suction cup 22 is interposed between the sliding pads 41a and 41a and the fixed pads 42a and 42a. There is a gap into the upper part of the sucked bag 5. The sliding pads 41 a and 41 a and the fixed pads 42 a and 42 a have a structure capable of adsorbing the bag 5 similarly to the suction cup 22 and are connected to the vacuum pump connected to the suction cup 22. .

  The guide plate 52 is fixed to the fixed block 42 and is arranged so as to protrude from the fixed block 42. The guide plate 52 is formed with an inclined surface 52a inclined by a predetermined angle by bending a thin plate, and the inclined surface 52a is inclined so as to narrow the conveyance path of the bag 5 toward the sliding block 41. ing. Further, the end portion of the inclined surface 52a is positioned so as to protrude slightly from the suction surface of the fixed pads 42a, 42a, and the guide plate 52 covers the side surface of the fixed block 42 so as to partially cover the side surface. It is screwed to the back of the. Therefore, even if the upper portion of the bag 5 adsorbed by the take-out means 20 is warped as shown in FIG. 2, the warpage is corrected along the inclined surface 52a of the guide plate 52, and the bag 5 reaches a predetermined position. Can be transported.

  On the other hand, the guide plate 51 is fixed to the sliding block 41 and is arranged so as to protrude from the sliding block 41. This guide plate 51 is formed with an inclined surface 51a inclined by a predetermined angle by bending a thin plate, and this inclined surface 51a is inclined so as to narrow the conveyance path of the bag 5 toward the fixed block 42. Yes. Further, the end portion of the inclined surface 51a is positioned so as to protrude slightly from the suction surface of the sliding pads 41a, 41a, and the guide plate 51 covers a part of the side surface of the sliding block 41. Screwed to the back of the sliding block. For this reason, even if the warp of the bag 5 shown in FIG. 2 occurs on the guide plate 51 side, the warp is corrected along the inclined surface 51a of the guide plate 51, and the bag 5 can be conveyed to a predetermined position.

  The fixing plate 60 is formed so as to extend along the horizontal conveyance path of the bag 5 and is arranged below the take-out means 20 and is expanded as shown in FIG. The sliding block 41 and the fixed block 42 are disposed in a gap. Thereby, since the lower part of the bag 5 taken out by the taking-out means 20 is regulated so as not to greatly warp to the reciprocating means 30 side, the warping of the upper part of the bag 5 is less likely to occur.

  The charging chute 65 is formed with a drop hole for the part over its entire length. The drop hole has a large opening at the top and narrows toward the bottom. Further, the lower part of the drop hole is disposed at a position that is close enough to come into contact with the fixed block 42 and at a position slightly higher than the upper end of the bag 5 so as not to touch the upper end of the horizontally transported bag 5. It is arranged.

  The hot wire 43 is configured to generate high heat by a momentary energization, and is disposed on the fixed block 42 of the opening means 40. Further, the mounting surface of the heat ray 43 is set to be substantially the same as the tip position of the fixed pads 42a, 42a.

  Next, the operation will be described. With the operation of the linear drive source 25 and the operation of the vacuum pump, the suction cup 22 of the take-out means 20 moves forward while drawing in the surrounding air. As a result, the suction cup 22 enters the punch hole 11 and comes into contact with the vicinity of the center of the bag 5 at the bottom of the bag stocker 10, so that the bag 5 is adsorbed and the rectilinear drive source 25 is moved backward. 5 is completed. The state at this time is the state shown in FIG. 2, and the lower portion of the bag 5 is not greatly warped toward the take-out means 20 by the fixing plate 60. If the fixing plate 60 is not installed, the bag 5 may be warped toward the bag stocker 10 or the take-out means 20 as shown in FIG. However, when the bag 5 is transported in the horizontal direction, the warped bag 5 enters the opening means 40 while warping is corrected by the inclined surfaces 51a and 52a of the guide plates 51 and 52, and warps. The part is not caught on the side surfaces of the sliding block 41 and the fixed block 42. That is, since the bag 5 is not pulled away from the suction cup 22, the falling of the bag 5 during conveyance is reduced. Thus, the take-out means 20 that has transported the bag 5 to the opening means 40 moves forward by the operation of the linear drive source 25, and the abutting bolt 24 presses the slide block 41. Slides toward the fixed block 42 and the upper portion of the bag 5 is sandwiched. At this time, since negative pressure is generated on the suction surfaces of the sliding pads 41a and 41a and the fixed pads 42a and 42a, the sliding pads 41a and 41a and the fixed pads 42a and 42a are held between them. The upper part of the bag 5 is adsorbed. Next, in response to the operation of the rectilinear drive source 25, the take-out means 20 moves backward, and the sliding block 41 moves in the direction of expanding by its own weight. As a result, the upper portion of the bag 5 is opened, and so-called components introduced from the charging chute 65 can be retained in the bag 5. In addition, since the suction state of the upper part of the bag 5 can be determined by the negative pressure acting on the suction surfaces of the sliding pads 41a and 41a and the fixed pads 42a and 42a, by measuring the negative pressure, You can see the open state. If the negative pressure is not within a predetermined range, the linear drive source 25 moves forward and opens the bag 5 until a predetermined negative pressure is obtained. As described above, when the bag 5 is correctly opened and the components are put into the bag 5, the linear drive source 25 moves forward, and the bag 5 is held again by the opening means 40. The opening of the bag 5 is thermally welded. When this heat welding is completed, the linear drive source 25 moves backward and the vacuum pump stops, the holding and adsorbing of the bag 5 are released, and the packed product is dropped and discharged to an unillustrated take-out location. Is done.

DESCRIPTION OF SYMBOLS 1 Packing machine 5 Bag 10 Bag stocker 11 Pull-out hole 20 Taking-out means 22 Suction cup 24 Abutting bolt 25 Straight drive source 30 Reciprocating means 40 Opening means 41 Nipping member (sliding block)
41a Sliding pad 42 Holding member (fixed block)
42a fixed pad 43 heat ray 51 guide plate 51a inclined surface 52 guide plate 52a inclined surface 60 fixed plate

Claims (1)

A bag stocker (10) in which a large number of planar bags (5) having openings on the upper surface are stacked, and a take-out means that can move in the front-rear direction and adsorb one bag (5) of the bag stocker (10) (20), a reciprocating means (30) capable of reciprocating the take-out means (20) in the horizontal direction, and both sides of the bag (5) holding the upper part of the bag (5) conveyed in the horizontal direction. In a packaging machine comprising two holding members (41, 42) for adsorbing and an opening means (40) each provided with a heat wire (43) that generates heat when energized,
Guide plates (51, 52) are arranged on the sides of the holding members (41, 42), and inclined surfaces (51a, 52a) are formed on the guide plates (51, 52) to absorb the bags ( 5) having a structure for guiding the holding member (41, 42) to the holding member ,
The fixing plate (60) extending along the conveyance path of the bag (5) is arranged between the holding members (41, 42) in an expanded state, and these holding members (41, 42) and the take-out A packaging machine characterized by being arranged below the means (20) .

Images