JP2019167156A - Bag opening machine - Google Patents

Abstract

To provide a bag opening machine which eliminates bending of a bag body, opens the bag body having divided bodies as contents, and can discharge the contents without remaining.SOLUTION: Considering the above-mentioned problem, this invention relates to a bag opening machine 1 which opens a bag body 20 for storing contents composed of a plurality of divided bodies in an opening region 10. The opening region 10 includes: an openable and closable deck 2 on which the bag body 20 is placed; a pair of clamping plates 3a, 3b which clamp the bad body 20 placed on the deck 2 from the horizontal direction; a gas supply part which injects gas in the bag body 20; and a cutting part which opens the bag body 20. The clamping plates 3a, 3b enable an adjustment movement for moving in a direction away from the bag body 20 after the start of gas supplying by the gas supply part. By this, bending of the bag body 20 is eliminated, and remaining of the contents (divided bodies) depending on this bending can be prevented.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a bag opening machine that opens a food bag body and releases the contents from the bag body, and in particular, automatically removes meat and other foods composed of a plurality of divided bodies separated from large chunks as the contents outside the bag body. Which can be released automatically.

  Conventionally, when selling chicken and other foods at supermarkets and other stores, the packaged chicken and other foods are opened from the package and refilled into individual trays. The work is mainly done manually, and a cutter is used as the means for opening the vacuum package, and the worker is careful to open and open only the package without damaging the contents. .

  Conventionally, a package opening device for cleaving a package obtained by vacuum packaging the contents of chicken and other foods to release the contents has been proposed. Patent Document 1 includes an opening arm, a conveying device that conveys the contents discharged by the opening arm, and a water absorption device that absorbs moisture of the contents, and the opening arm removes the package from below. The structure which has the arm to support and the adsorption | suction part provided in the front-end | tip part of the arm which expands the cleavage part of a package and discharges the contents is disclosed.

JP 2017-81576 A

  When the packaging opening device that cleaves the bottom of the package generates a bent part at the bottom of the package, the cleavage position shifts upward from the bottom, and one of the cleavage parts of the package is U-shaped or L-shaped. It becomes. The packaging and unsealing apparatus described in Patent Document 1 uses a single large chunk such as chicken as the contents, and even if a U-shape or the like is generated at the cleavage site, the contents are not caught at this site and released without residue. Can do. However, if the contents are divided into a plurality of small meats and other foods (divided bodies) such as chicken for fried chicken, in the configuration supported by the arm from below, some of the divided bodies are present at the cleavage site. There was a case where the divided body remained in the package.

  Therefore, there has been a demand for a bag opening machine that can open a package (bag body) containing a plurality of divided bodies and discharge the contents without any residue.

  The bag opening machine of the present invention is a bag opening machine that opens a bag body containing contents in an opening area, and in the opening area, an openable / closable deck on which the bag body is placed, and the deck A pair of clamping plates for clamping the placed bag body from the horizontal direction, an air supply unit for injecting gas into the bag body, and a cutting unit for opening the bag body, After the start of air supply by the air supply unit, adjustment movement that moves in a direction away from the bag is enabled.

  The adjustment movement of the clamping plate includes a first adjustment state in which the clamping plate moves away from the bag body and a second adjustment state in which the clamping plate moves further in the direction of clamping the bag body. It is preferable that the bag body is turned upside down by the movement of the clamping plate in the state and the second adjustment state and gas injection by the air supply unit.

  Moreover, it is preferable that a clamping board consists of a stationary plate which has a supply-and-removable air supply part inside, and an operation | movement board which can move to a horizontal direction.

  Moreover, it is preferable to have the bag holding part which adsorbs and holds the bag body on the holding surface of the fixed plate and the operation plate.

  According to the first aspect of the present invention, in a state where gas is injected from the air supply portion into the bag body, the holding state of the holding portion is once released, so that the bag body is filled with gas, and the posture of the bag body is adjusted. Further, it is possible to prevent the contents (divided bodies) from remaining due to the bent portion.

  According to the second aspect of the present invention, after the holding state of the holding plate is once released, the holding state is further changed to not only fill the bag body with gas but also complete the inverted state of the bag body to eliminate bending. can do.

  According to the invention of claim 3, the clamping plate is divided into a fixed plate and an operation plate, the air supply part and the cutting part are arranged on the fixed plate, and the adjustment movement is performed on the operation plate, thereby concentrating the adjustment movement on one side, On the other hand, the operation of cutting off the supply air is concentrated, and stable cutting control is possible.

  According to the invention described in claim 4, by having the bag holding portion on the holding surface of the holding plate, the bag body can be held from both sides of the bag body, and the contents can be dropped and released from the opening position of the bag body. .

It is a front view of the bag opening machine concerning the embodiment of the present invention. FIG. 2 is an enlarged front view of the periphery of a bag opening region by the bag opening machine of FIG. 1. FIG. 3 is an enlarged plan view around the unsealed region of FIG. 2. The schematic diagram of the opening operation | movement of the opening area | region periphery of FIG. 2 is shown, (a) is the state which mounted the bag body, (b) is the state which clamped the bag body, (c) loosened clamping It is a state, (d) is the state which clamped again and adjusted the attitude | position. It is an opening operation | movement flow by the bag opening machine of FIG.

  Embodiments of the present invention will be described in detail with reference to the drawings. With respect to this embodiment, the left side, right side, upper side, and lower side of FIG. 1 will be described as the left side, right side, upper side, and lower side of this embodiment, and the lower side and upper side of FIG.

  In the present embodiment, as shown in FIG. 1, the bag body 20 having the contents is opened, and the bag opening machine 1 that releases the contents to the outside of the bag body 20 is used. The bag body 20 contains the contents in a deaerated state (depressurized state) such as vacuum packaging. The present invention exerts its original effect when the contents are a plurality of divided bodies such as small meat and other foods that are pre-divided from a large lump, and in the present embodiment, the contents are for fried It is assumed that the meat is encased in chicken that has been cut into small chunks. However, it is not intended only for these divided bodies.

  As shown in FIG. 1, the unpacking machine 1 puts a supply unit 8 composed of a belt conveyor and a bag body 20 sequentially supplied by the supply unit 8 into an opening region 10, and the bag unit 20 is opened in the opening region 10. It is sandwiched between a pair of sandwiching plates composed of an operation plate 3a and a fixed plate 3b, opened by a cutting section composed of a cutter 5, and the contents are discharged to the discharge region 11.

  In the opening area 10, as shown in FIG. 2, the deck 2 that is the lower surface of the opening area 10, the pair of sandwiching plates that are the operation plate 3a and the fixing plate 3b that are both sides of the deck 2, and the protruding and retracting from the fixing plate 3b are possible. An air supply unit including the air supply needle 4, a bag holding unit 6, a cutter 5, and a bag discharge unit 7 for ejecting air are arranged. The unsealed region 10 is supported by the deck 2 from below with the bag body 20 introduced from the supply unit 8 in a semi-inverted state, and the bag body 20 is supported by the operation plate 3a supported from the left side and the fixed plate 3b supported from the right side. Pinch.

  The supply unit 8 is, for example, a belt conveyor, and supplies the bag body 20 from above to the opening region 10 where the bag body 20 is opened. A guide plate 9 is disposed between the supply unit 8 and the unsealing region 10 so that the bag 20 introduced from the supply unit 8 can be accurately inserted into the unsealing region 10.

  The deck 2 includes a rectangular bottom plate, closes the bottom portion of the opening region 10, and serves as a mounting surface that supports the bag body 20 supplied to the opening region 10 from below. The deck 2 can be opened and closed left and right by the deck drive unit 12 and moved to the left (outward) from the opening area 10 to open the bottom of the opening area 10. The deck drive unit 12 is formed of, for example, a pneumatic cylinder, but may be other opening / closing means such as a hydraulic type.

  The operation plate 3 a is disposed on the left side of the opening region 10 and has a holding surface wider than the side surface of the bag body 20. The operation plate 3a can be moved in the horizontal direction (left-right direction) toward the opening region 10 by the sandwiching drive unit 13, and can be sandwiched and pressed by moving to the right side. It moves away from the bag body 20 by moving, and is released from the sandwiched state and the pressed state. The clamping drive unit 13 is formed of, for example, a pneumatic cylinder, but may be other moving means such as a hydraulic type.

  The fixed plate 3b is fixedly disposed on the right side surface of the unsealing region 10, and the fixed plate 3b has a holding surface wider than the side surface of the bag body 20 like the operation plate 3a. The pair of sandwiching plates composed of the operation plate 3a and the fixed plate 3b sandwich the bag body 20 in the unsealing region 10 from the left and right by both sandwiching surfaces to prevent the bag body 20 from overturning and to be opened by the cutter 5 Positioning.

  The air supply needle 4 has a long cylindrical shape on the left and right, and the left end thereof is a sharp needle tip. The air supply needle 4 is disposed so as to be able to project and retract from an opening position where the holding surface of the fixing plate 3b is opened, and the bag body 20 is inserted into the unsealing region 10 in a semi-inverted state and is held by the operation plate 3a. It protrudes from the clamping surface of the fixing plate 3b and pierces the bag body 20. Then, the bag body 20 is inflated by injecting gas from the air supply needle 4. The air supply needle 4 inflates the sandwiched bag body 20 to facilitate separation of the divided body from the bag body 20, and prevents the bag body 20 from escaping when the cutter 5 is cleaved. It is possible.

  The air supply needle 4 is located in the vicinity of the center of the vertical dimension of the fixing plate 3b, and is disposed near the center of the vertical dimension of the opening region 10 (at the center or below the center), and near the center of the vertical dimension of the bag body 20. Pierce. A gas supply source (not shown) that supplies gas into the needle is connected to the right end of the air supply needle 4. The needle drive unit 14 is composed of, for example, a pneumatic cylinder, but may be other drive means.

  The cutter 5 has a blade facing backward, and is movable in the front-rear direction (vertical direction in FIG. 3) by the moving unit 15. The cutter 5 uses the front side of the bag body 20 as a standby position and opens the lower side of the bag body 20 whose posture is adjusted.

  As the moving unit 15 moves in the front-rear direction, the protruding position of the cutter 5 in the left-right direction can be changed by the link mechanism. This link mechanism is provided with a spring (not shown) and is gently biased so that the tip of the cutter 5 hits the bag body 20. Thereby, when the front-end | tip of the cutter 5 contacts the bag body 20, it moves to the front-back direction in the state urged | biased by the bag body 20 along the edge, and the bag body 20 is opened. This urging is gentle and suppresses contact between the cutter 5 and the contents.

  The adjustment movement of the operation plate 3a is performed after the bag body 20 is sandwiched between the operation plate 3a and the fixed plate 3b and the supply of the air supply needle 4 is started. It adjusts to a proper inverted state. This adjustment movement includes a first adjustment state and a second adjustment state. In the first adjustment state, while the air supply by the air supply needle 4 is continued, the operation plate 3a is temporarily moved in a direction away from the bag body 20 (left side in FIG. 2) so as not to fall, and is fixed to the operation plate 3a. Slightly loosen the bag 20 by the plate 3b. And the space which can further inflate the bag body 20 is formed in the opening area | region 10, the bending site | part 20a (lower part) of the bag body 20 is inflated, and the attitude | position of the bag body 20 is adjusted.

  In addition, unlike the thing of this embodiment, the 1st adjustment state may adjust the attitude | position of the bag body 20 by moving the action | operation board 3a in the direction away from the bag body 20 following supply air. For example, when the operation plate 3a is sandwiched and released, the operation plate 3a is released (movable), and the bag body 20 that is inflated by air supply is pushed away from the bag body 20 to push the operation plate 3a. The operation plate 3a may be moved.

  In the second adjustment state, the operation plate 3a is moved again to the bag body 20 side, and the inflated bag body 20 is pinched and pressed again, and the bag body 20 is pinched in the adjusted posture. Thereby, the bending of the lower part of the bag body 20 is eliminated. Thereby, the semi-inverted state at the time of throwing the bag body 20 into the opening area | region 10 from upper direction is eliminated. Here, the semi-inverted state means that the bag body 20 introduced from the transport unit 8 is bent downward immediately after being introduced into the opening region, or is bent upward in the opening region 10 so that the operation plate 3a is fixed. It is in a state of leaning against the plate 3b and not in a completely inverted state. Then, by the adjustment movement by the operation plate 3a, the bag body 20 can be turned upside down to prepare for opening by the cutter 5.

  The bag body 20 is opened at the bottom by the cutter 5, so that the contents fall from the bag body 20. The bottom of the opening area 10 is opened, and the opening area 10 communicates with the discharge area 11 provided below the opening area 10 in the vertical direction, so that the contents are dropped and released into the discharge area 11. Although not shown in the drawing, the discharge area 11 has a receiving portion such as a conveyor or a rack for receiving the contents discharged from the bag body 20, and receives the contents discharged from the bag body 20 to supply the contents to the outside. It is possible.

  The bag holding portions 6 and 6 have suction pads 6a and 6a that can be sucked by air (negative pressure) at their tips, and are arranged in openings formed in the operation plate 3a and the fixed plate 3b. The suction pads 6a, 6a and the sandwiching surfaces of the operation plate 3a and the fixed plate 3b are on the same plane and are arranged to face each other on the left and right. The bag holding unit 6 sucks and holds the lower portion of the bag body 20 from the left and right sides in an inflated state. The bag holding unit 6 holds the bag body 20 in the opening area 10 at the same time that the bottom of the opening area 10 is opened, and prevents the bag body 20 from falling into the discharge area 11.

  The bag holding portions 6 and 6 hold the bag body 20 by pulling and adsorbing the left and right side surfaces of the lower portion of the bag body 20 to the left and right outwards (directions facing the clamping direction) by negative pressure. The suction pads 6a and 6a of the bag holding portions 6 and 6 of the present embodiment are assumed to have their tips flush with the clamping surfaces of the operation plate 3a and the fixed plate 3b, but are located slightly behind the clamping surfaces. It may be.

  The bag discharge unit 7 discharges the empty bag to the outside of the opening region 10 by injecting air onto the outer peripheral surface of the bag body 20 (hereinafter referred to as an empty bag) from which the contents have been released. Specifically, when the discharge of the contents is completed and the bag holding unit 6 releases the suction, the bag discharging unit 7 blows out air toward the rear, and the empty bag discharges the empty bag behind the opening region 10. . The bag discharge unit 7 is positioned in front of the bag body 20 placed on the deck 2 and inflated, and has an air outlet toward the bag body 20. This spout is located below the bag holding portion 6 and is disposed near the center of the left-right dimension of the front end face of the opening region 10. In addition, the bag discharge part 7 should just discharge the bag body 20 out of the receiving part of the opening area | region 10 and the discharge | release area | region 11.

  Next, the opening operation of the bag body 20 by the bag opening machine 1 will be described. As shown in FIG. 5, the opening operation includes an input step S <b> 1 for inserting the bag body into the opening area 10, a first clamping step S <b> 2 for clamping the bag body 20, and an air supply step for injecting gas into the bag body 20. S3, a second clamping step S4 that once moves in the direction away from the operation plate 3a, and further moves toward the bag body 20, and a cleaving and adsorption step S5 that adsorbs and holds the bag body 20 while cleaving the bag body 20; It comprises a bag body discharging step S6 for discharging the bag body 20 with air.

  As shown in FIG. 4A, in the standby state (initial state) of the opening operation, the left end of the opening region 10 where the operation plate 3a is farthest from the fixed plate 3b (on the left side of the planned placement position of the bag body 20) ), The deck 2 closes the bottom of the opening area 10. In this state, the operation plate 3a may not be in a position where the bag body 20 falls down. In this state, the air supply needle 4 does not protrude from the fixed plate 3b, the bag holding unit 6 does not perform the suction operation, and the cutter 5 is at the front end of the opening region 10 (frontward from the planned placement position of the bag body 20). Located in.

  As shown in FIG. 4B, when the supply unit 8 supplies the bag body 20 to the unsealing region 10 in the charging step S1, the operation plate 3a moves to the right side to clamp the bag body 20 in the first clamping step S2. In the air supply step S3, the air supply needle 4 protrudes to the left of the fixed plate 3b and stabs into the bag body 20 to start air supply. The air supply needle 4 continues to protrude and inject even after the movement of the operation plate 3a is completed.

  As shown in FIG. 4 (c), when the bag body 20 is clamped by the operation plate 3a and the fixed plate 3b and the supply of air by the supply needle 4 is started, the operation plate 3a starts adjustment movement by the second clamping step S4. To do. While the air supply needle 4 supplies air, an adjustment movement is performed in which the operation plate 3a moves slightly to the left. This adjustment movement is a movement that moves the operation plate 3a backward to such an extent that the bag body 20 is filled with gas in the supplied state. The operation plate 3a has a distance from the fixed plate 3b corresponding to the thickness of the bag body 20 in a vacuum state even when the bag body 20 is sandwiched. Therefore, the actual retreating movement by the adjustment movement is a difference in the thickness in which the bag is filled with gas from the thickness of the bag body itself, and the actually retreating width direction length T is about 5 mm.

  Next, as shown in FIG. 4D, after the bag body 20 is further inflated, the operation plate 3a moves to the right again, and the bag body 20 is sandwiched again. This adjustment movement performs a first adjustment state in which the operation plate 3a moves away from the bag body 20 and a second adjustment state in which the movement plate 3a moves in the direction of clamping immediately thereafter.

  The cutter 5 moves to a predetermined position set in advance according to the size of the bag body 20. This position is, for example, approximately the center of the left-right dimension of the bag body 20. This movement is an operation in a place where it does not interfere with the clamping plate, the air supply needle 4 and the bag body 20, and the cutter 5 waits at this predetermined position until the posture adjustment of the bag body 20 is completed and it can be opened.

  When re-clamping, the cutter 5 moves rearward by the tearing and suction step S5 while the operation plate 3a continues to move to the right, and the bag body 20 starts to tear. By further pressing the bag body 20 with the operation plate 3 a in this way, the bag body 20 does not escape from the tip of the cutter 5, and the cutter 5 can be stably stabbed into the bag body 20. The bag body 20 does not escape, and the opening (cutting) of the bag body 20 can be continued and progressed stably. Then, when a predetermined set time elapses or a predetermined set amount is moved from the start of the movement, the operation plate 3a stops moving.

  When a predetermined set time elapses from the start of the cutting by the cutter 5 or when the cutter 5 moves a predetermined set amount, the deck 2 opens the bottom of the opening region 10, and the bottom of the bag 20 is opened to the discharge region 11. Start releasing the contents. In this way, by opening the bottom of the opening region 10 in the middle of the cleavage when the set time reaches the set time (set amount), the bag body 20 can be stably opened and opened by the cutter 5.

  In addition, in accordance with the opening of the bottom of the opening area 10, the bag holding unit 6 starts holding (sucking) the bag body 20 to prevent the bag body 20 from dropping into the discharge area 11. Then, when the cutting of the bag body 20 is completed, the cutter 5 stands by behind the bag body 20 in the opening region 10.

  When a predetermined set time elapses from the start of discharge of contents (opening of the bottom), the air supply needle 4 stops piercing and shifts to an extraction operation, and the predetermined set time elapses or is set from the start of extraction. The air supply is stopped when the amount is moved.

  When a predetermined set time elapses from the start of discharge, the operation plate 3a moves to the left and returns to the standby state position (the left end of the unsealing region 10). The timing at which the operation plate 3a returns is preferably after the start of the extraction operation of the air supply needle 4.

  Further, when a predetermined set time has elapsed from the start of the discharge of the contents, the deck 2 closes the bottom of the opening area 10. The timing at which the deck 2 is closed is further after the timing at which the supply of air is stopped.

  Prior to a predetermined set time before the start of the closing operation by the deck 2, the bag holding unit 6 releases the suction / holding by the bag discharging step S6, and the bag discharging unit 7 jets air for a predetermined time to empty the bag. The cutter 5 starts to return to the standby position. The timing for starting these operations is preferably after the discharge of the contents is completed, and the timing for starting the cutter 5 is more preferably after the start of discharging the empty bag. Further, the empty bag is discharged and the cutter 5 starts to return at a timing when a predetermined time elapses with reference to the start of the discharge of the contents.

  Moreover, the supply part 8 will start the preparation of the bag body 20 which unpacks next, when discharge | release of the content (open | release of the bottom of the opening area | region 10) is started. For example, as shown in FIG. 2, the next bag 20 is put on standby at the downstream end of the supply unit 8 (conveyor). When the bottom of the open area 10 is closed, the prepared next bag body 20 is dropped and supplied to the open area 10. The unpacking machine 1 starts the opening operation of the next supplied bag body 20 and repeats the opening operation until the supply of a new bag body 20 stops.

  In addition, since the bag body 20 is pushed and moved in the left-right direction by the sandwiching plate (operation plate 3a), depending on the position and posture supplied to the deck 2, the folding portion 20a is generated at the lower portion of the bag body 20 by this sandwiching operation. Sometimes. The adjustment movement can also eliminate the bent portion 20a caused by this operation.

  DESCRIPTION OF SYMBOLS 1 ... Bag opening machine, 2 ... Deck, 3a ... Operation board (clamping board), 3b ... Fixed board (clamping board), 4 ... Air supply needle (air supply part), 5 ... Cutter (cutting part), 6 ... Bag Holding unit, 10 ... opening region, 11 ... discharge region, 8 ... supply unit, 20 ... bag.

Claims (4)

A bag opening machine that opens a bag body containing contents in an opening area,
In the opening region, an openable / closable deck for placing the bag body, a pair of sandwiching plates for sandwiching the bag body placed on the deck from the horizontal direction, and an air supply unit for injecting gas into the bag body, A cutting portion for opening the bag body,
The unrolling machine according to claim 1, wherein the holding plate enables an adjustment movement that moves in a direction away from the bag body after the supply of air by the supply unit is started. The adjustment movement of the clamping plate includes a first adjustment state in which the clamping plate moves away from the bag body and a second adjustment state in which the clamping plate moves further in the direction of clamping the bag body,
2. The bag opening machine according to claim 1, wherein the bag body is turned upside down by movement of the clamping plate and gas injection by an air supply unit in the first adjustment state and the second adjustment state.   3. The bag opening machine according to claim 1, wherein the holding plate includes a fixed plate having an air supply portion that can be freely projected and retracted, and an operation plate movable in a horizontal direction.   4. The bag opening machine according to claim 3, further comprising a bag holding portion that holds the bag body by suction on a holding surface between the fixed plate and the operation plate.

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