JP2009023691A - Apparatus for folding bag opening - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus that automatically folds the opening of each bag, regardless of the amount of the contents of the bag by stabilizing a folding operation. <P>SOLUTION: The apparatus 1 is configured so that the mouth part of each bag filled with its contents is automatically bent by the first and second bag-mouth-bending mechanisms 7 operated in conjunction with each other. In this apparatus 1, immediately in front of the first bending flap of the bag mouth part, bending clamp mechanisms, which grip both the left and right ends of the first bending flap and bend the bag mouth part integrally with a first bending plate 32, are disposed at both ends of a first bending plate 32. The clamp mechanisms have: corresponding sliding plates attached so as to freely slide outward from the left and right ends of the first bending plate 32; and clamping segments freely movably attached to the sidewise ends of the corresponding slide plates, turned toward the lower faces of the slide plates, thereby gripping the end of the first bending flap of the bag mouth part between the clamping segments and the lower faces of the corresponding side plates. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a bag opening bending device that fills the contents of, for example, a gusset bag as a bag having a thickness storage space having both side surfaces, and automatically folds and seals the bag opening. The present invention relates to a bag opening bending apparatus that stably and automatically bends the bag opening regardless of the contents filled therein.

When filling a bag with thick contents, the bag cannot be filled smoothly when the bag is flat. For this reason, gusset bags may be used. Before filling, the gusset bag is flattened by bending both sides of the bag having a thickness toward the inside. When the thick contents are filled, both side portions bent inward are easily opened in the thickness direction. A constant storage space is formed in the width direction and the thickness direction inside the opened gusset bag, and the bag can be smoothly filled with a thick content.
In order to seal the bag opening of the gusset bag, the bag opening first folding piece and the bag opening second folding piece face each other across the opening inner side. To seal the bag opening of the gusset bag, after the bag is filled with the contents, first, the bag opening portion first bent piece is bent at a substantially right angle toward the inside of the opening. Subsequently, the bag opening portion second bent piece is bent at a substantially right angle so as to overlap the upper surface side of the bent bag opening portion first bent piece. This sealing operation is automatically performed by a bag opening folding device.
In order to seal the bag opening portion of the gusset bag, an adhesive paste is attached in advance to the contact surface side of the bag opening portion second bent piece that is bent to the upper surface side of the bag opening portion first bent piece. After filling the inside of the gusset bag with thick contents, if the bag opening first folding piece and the bag opening second folding piece of the gusset bag are automatically folded in this order, the bag opening second folding The adhesive paste adhered to the close contact surface side of the bent piece adheres to the folded upper surface side of the bag opening portion first bent piece, and the bag opening portion is reliably sealed.
JP 62-208307 A

However, when filling the gusset bag with thick contents and then automatically folding the bag opening first folded piece and the bag opening second folded piece of the gusset bag, there are the following problems: there were.
Since the size of the contents filled in the gusset bag is not constant, the folding position of the first folded piece of the bag opening varies depending on the contents and is not stable. In addition, the upper end side of the filled contents may be inclined rather than horizontal with respect to the width direction of the gusset bag. In this case, the bag opening first bent piece is gusseted according to the inclination of the contents. The bag may be folded while being tilted in the width direction of the bag.
For this reason, the second folded piece of the bag opening portion of the gusset bag that is subsequently folded may not be fixed, and may be folded in a state of being inclined in the width direction of the gusset bag. As a result, the adhesive paste attached to the contact surface side of the bag opening second folded piece does not accurately adhere to the upper surface side of the bag opening first folded piece, and the opening of the gusset bag The automatic sealing operation of the part becomes unstable.

  In view of the above problems, the present invention has been devised to solve the problems. The object of the present invention is to have a thickness storage space with both side surfaces and filled with contents. The folding position of the first folded piece of the bag opening is obtained by grasping the right and left ends of the first folded piece with the clamp mechanism and folding it immediately before folding the first folded piece of the bag opening where the bag is first folded. The bag opening fold can be stably and automatically folded regardless of the content of the contents filled in the bag opening. It is to provide a bending apparatus.

  In order to achieve the above object, according to the first aspect of the present invention, after filling a bag having a thickness storage space having both side surfaces with the contents, the first folded piece of the bag opening is placed inside the bag opening. The bag opening portion first folding mechanism including the first folding plate that is bent toward the bag and the bag opening portion second folding piece is folded so as to overlap the upper surface side of the folded bag opening portion first folding piece. A bag opening portion second folding mechanism provided with a second folding plate, and the bag opening portion filled with the contents is formed by the cooperation of the bag opening portion first folding mechanism and the bag opening portion second folding mechanism. In the bag opening folding apparatus that automatically bends and seals by movement, the first folding plate grips the left and right ends of the first folding piece immediately before folding the bag opening first folding piece. And a clamp mechanism that bends integrally with the first folding plate.

  The invention according to claim 2 is the first folding in which the bag opening portion first folded piece is bent toward the inside of the bag opening portion after the contents having been filled in the bag having the thickness storage space having both side surfaces are filled. A bag opening first folding mechanism having a curved plate and a second folding plate for folding the bag opening second folded piece so as to overlap the upper surface side of the folded bag opening first folded piece. A bag opening portion second folding mechanism, and the bag opening portion filled with the contents is automatically folded by the cooperation of the bag opening portion first folding mechanism and the bag opening portion second folding mechanism. In the bag opening bending device to be sealed, a clamp that grips both the left and right ends of the first folding piece and folds together with the first folding plate immediately before folding the bag opening first folding piece. The mechanism is provided on both end sides of the first bent plate, and the clamp mechanism is provided from the left and right ends of the first bent plate. First of the bag opening portion between the slide plate slidably attached to the side and the movably attached to the side end side of the slide plate and the lower surface of the slide plate. It comprises means comprising a clamp piece that is gripped across the end side of the bent piece.

  As is clear from the above description, according to the bag opening folding apparatus according to the present invention, the bag opening portion that has a thickness storage space having both side surfaces and the bag filled with the contents is bent first. Since the right and left ends of the first folded piece are gripped by the clamping mechanism immediately before folding the folded piece, the folding position of the first folded piece of the bag opening is kept constant, and the subsequent bag opening It is possible to stabilize the folding operation of the two-folded piece. Thereby, there is an extremely new beneficial effect such that the bag opening can be stably and automatically folded regardless of the content of the filled contents.

Hereinafter, the present invention will be described more specifically based on the best mode for carrying out the invention described in the drawings.
Here, FIG. 1 is a side view of the main part of the bag opening part bending apparatus, FIG. 2A is a schematic partial plan view of the bag opening part bending apparatus, and FIG. 2B is an outline of the bag opening part bending apparatus. FIG. 3 is a partial front view, FIG. 3 is a partial side view of the bag opening first folding mechanism of the bag opening folding apparatus, and FIG. 4A is a plan view of the first folding plate of the bag opening folding apparatus. 4 (B) is an end side view of the first folding plate of the bag opening folding device, FIG. 5 is a front view of the first folding plate of the bag opening folding device, and FIG. 6 is the bag opening folding. FIG. 7 is a work diagram immediately before folding the first folding plate of the apparatus, FIG. 7 is a work diagram in the middle of folding the first folding plate of the bag opening folding apparatus, and FIG. 8 is the first folding of the bag opening folding apparatus. It is a work drawing immediately after bending a board.

  In the figure, a bag opening folding device 1 is a device that automatically folds and seals a bag opening 91 of a gusset bag 9 filled with contents. Clamp mechanism 4 provided on both ends of first folding plate 32 of first folding mechanism 3, bag opening first folding mechanism 3, bag opening side bending mechanisms 5 and 6, bag opening second The folding mechanism 7 and the bag opening pressing mechanism 8 are configured.

  The bag opening sealing work table 2 is a table on which the bag opening 91 of the gusset bag 9 filled with contents is automatically folded and sealed, and the bag opening 91 of the gusset bag 9 is sealed. It is structured to tilt up and down between a work position inclined obliquely upward at the time of operation and a delivery position inclined obliquely downward to send the gusset bag 9 to the next process after the sealing work is completed.

  A work table rotating shaft 21 that rotates about a horizontal axis is attached to the lower part of the base end side of the bag opening portion sealing work table 2. The rotation shaft 21 is supported by a bearing (not shown) of the frame 11 of the bag opening bending apparatus 1. The bag opening portion sealing work table 2 tilts up and down freely with the work table rotation shaft 21 as a fulcrum and in an obliquely upward state at the work position and an obliquely downward state at the delivery position.

  A worktable tilting cylinder 22 that tilts up and down with a worktable rotation shaft 21 as a fulcrum is attached to the frame 11 of the bag opening folding apparatus 1 below the bag opening sealing worktable 2. The worktable tilting cylinder 22 extends the piston rod upwards except that the gusset bag 9 is sent to the next process, maintains the bag opening sealing worktable 2 obliquely upward, and contracts only when the gusset bag 9 is sent out. Then, the bag opening portion sealing work table 2 is set obliquely downward.

  A bag filling work table (not shown) is provided on one side of the bag opening sealing work table 2, and contents are filled into the open bag opening 91 of the horizontal gusset bag 9. Is called. When the gusset bag 9 is filled with the contents, the bagging work table tilts from the horizontal state to the same state as the inclination of the bag opening sealing work table 2, and the gusset bag 9 filled with the contents opens the bag opening. The part 91 is slid as it is in an obliquely upward state and moved onto the bag opening sealing work table 2.

  A plurality of rollers (not shown) are attached to the bottom surface of the bag opening sealing work table 2 at equal intervals in the lateral direction so that the gusset bag 9 filled with contents easily slides. Further, a conveyor 12 for carrying out the gusset bag 9 in which the bag opening 91 is sealed is attached to the lower side of the bag opening sealing work table 2 where the opening of the gusset bag 9 is sealed. . The conveyor 12 is attached to the frame 11 of the bag opening folding apparatus 1.

  The bag opening portion first folding mechanism 3 is directed downward, that is, toward the inside of the bag opening portion 91, of the bag opening portion first folding piece 92 of the gusset bag 9 obliquely upward on the bag opening portion sealing work table 2. The folding device is provided on the upper side of the bag opening sealing work table 2 so as to be movable up and down toward the bag opening 91 of the gusset bag 9. The bag opening portion first bending mechanism 3 includes an elevating girder 31, a first bent plate 32, a first bent plate rotating cylinder 33, a first surface retaining plate 34, an elevating cylinder 35, and the like.

  The elevating girder 31 includes a bag opening first folding mechanism 3, a clamping mechanism 4 provided on both ends of the first folding plate 32, and a bag opening side folding provided on one side of the first surface retaining plate 34. It is a member that moves the bending mechanism 6 and the like in the vertical direction toward the bag opening 91 of the gusset bag 9.

  The elevating girder 31 is attached in the front-rear direction with respect to the bag opening sealing work table 2, and a bracket 31 a is attached upward on the side of the elevating girder 31 close to the bag opening sealing work table 2. The base end side of the lifting / lowering digit operating lever 31c is integrally connected to the upper part of the bracket 31a via the lifting / lowering digit rotating shaft 31b. The lifting / lowering girder rotating shaft 31b is pivotally supported by a bearing attached to the frame 11 of the bag opening bending apparatus 1.

  The tip end of the piston rod of the lifting / lowering digit lower moving cylinder 31d is pivotally connected to the tip of the lifting / lowering digit operating lever 31c. The elevating girder lower moving cylinder 31d rotates the elevating girder 31 downward about the elevating girder rotation shaft 31b and moves the elevating girder 31 downward toward the bag opening 91 of the gusset bag 9. The lifting / lowering girder lower moving cylinder 31d is attached downward to a bracket connected to the frame 11 of the bag opening bending apparatus 1.

  A hanging plate 31e is attached to the substantially central portion of the elevating girder 31 downward. On the lower end side of the suspension plate 31e, the first folding plate 32 that bends the bag opening first folding piece 92 of the gusset bag 9 obliquely upward on the bag opening sealing work table 2 is rotated in the vertical direction. It is connected freely.

  The first bent plate 32 is a plate that bends the bag opening first bent piece 92 of the gusset bag 9 downward, that is, directly toward the inner side of the bag opening 91, and has a rectangular plate shape that is horizontally long. Yes. The horizontally long first bent plate 32 has a width that is slightly shorter than the left and right width of the bag opening first bent piece 92 to be bent.

  A slide plate 41 of the clamp mechanism 4 is slidably attached to both ends of the left and right lateral widths of the slightly shorter first folding plate 32, and the total length including both slide plates 41 is a bag. It is the same as the left and right lateral width of the opening first bent piece 92. Moreover, the short vertical width direction length of the rectangle of the 1st bending board 32 is a little longer than the vertical width length from the front-end | tip of the bag opening part 91 of a bag opening part 1st bending piece 92 to a bending location. It has become.

  The both sides of the first folding plate 32 turn to the tip of the suspension plate 31e suspended downward from the lifting / lowering girder 31 with the center portion of the upper surface on the upper end side when bent downward. It is connected through a shaft 32a so as to be rotatable up and down. The first bent plate 32 is rotatable up and down about the first bent plate rotating shaft 32a. That is, the first bent plate 32 rotates downward about the first bent plate rotation shaft 32a to bend the bag opening first bent piece 92 downward.

  A first bent plate rotating cylinder 33 that rotates the first bent plate 32 in the vertical direction about the first bent plate rotating shaft 32 a is attached to the upper side of the first bent plate 32. The first bent plate rotation cylinder 33 is attached downward from the upper end side of the suspension plate 31e protruding upward from the lifting girder 31.

  The front end side of the piston rod of the first bent plate rotating cylinder 33 is pivotally connected to a bracket 32 b at the center of the upper surface of the first bent plate 32. In the first bent plate rotation cylinder 33, the piston rod extends downward to rotate the first bent plate 32 downward, and contracts upward to return the first bent plate 32 to the standby position.

  On the lower side of the lifting / lowering girder 31 is a first surface pressing for pressing the bag first surface on the same side as the bag opening first bent piece 92 of the gusset bag 9 diagonally upward on the bag opening sealing work table 2. A stop plate 34 is attached. The first surface retaining plate 34 presses the first surface of the bag during the sealing operation of the bag opening 91 of the gusset bag 9 and holds it between the bottom surface side of the lower bag opening sealing work table 2 from above and below. Thus, the gusset bag 9 is prevented from moving up and down during the sealing operation.

  The first surface retaining plate 34 is suspended by a downward elevating cylinder 35 attached to an elevating girder 31 on the side farther from the bag opening sealing work table 2. The elevating cylinder 35 has a structure in which the piston rod extends downward to move the first surface retaining plate 34 downward to press the bag first surface of the gusset bag 9.

  The clamp mechanism 4 is a device that grips both the left and right ends of the first bent piece 92 immediately before the bag opening first bent piece 92 is bent, and the first bent plate 32 of the bag opening first bent mechanism 3. Are provided at both left and right ends. The clamp mechanism 4 includes a slide plate 41, a slide actuator 42, a clamp piece 43, a clamp piece rotating cylinder 44, and the like.

  The slide plate 41 is slidably extended from the left and right side ends of the first bent plate 32 toward the outer side, and is attached thereto. The slide plate 41 is attached to the left and right ends of the first bent plate 32 in a left-right symmetric L shape in plan view. The slide plate 41 is movable integrally with the first bent plate 32. The slide plate 41 is an L-shaped plate, and the lower surface of the slide plate 41 is always flush with the lower surface of the first bent plate 32. The outer side edges of the left and right slide plates 41 are perpendicular to the bent front end side of the first bent plate 32.

  The slide actuator 42 is a device that slides the slide plate 41 outward from the left and right ends of the first bent plate 32. For example, an air slide table is used. The main body side of the slide actuator 42 is attached to the left and right sides of the upper surface of the first bent plate 32. The distal end side of the slide actuator 42 is connected to the upper surface of the slide plate 41.

  A variable plate 43a integrally formed with clamp pieces 43 at the outer side ends of the left and right slide plates 41 toward the lower portion of the front half side that becomes the front end side when the first bent plate 32 is rotated downward. Are attached to each. The clamp piece 43 and the variable plate 43a are attached to the outer side end of the slide plate 41 so as to be perpendicular to the slide plate 41 at the standby position.

  The clamp piece 43 is attached so as to protrude below the slide plate 41 at the standby position, and the variable plate 43a is attached so as to protrude above the slide plate 41 at the standby position. The clamp piece 43 protruding downward from the slide plate 41 at the standby position is formed downward, for example, in a triangular shape.

  The clamp piece 43 formed downward, for example, in a triangular shape, wraps around the lower surface side of the slide plate 41 at a position where the left and right ends of the bag opening portion first bent piece 92 are gripped, and is slightly spaced from the lower surface of the slide plate 41. The clamp piece 43 and variable so that the left and right ends of the bag opening portion first bent piece 92 are sandwiched vertically between the lower surface of the slide plate 41 and the upper surface of the clamp piece 43. The plate 43a is movably attached.

  The variable plate 43a having the clamp piece 43 formed in the lower portion projects toward the slide plate 41 at an intermediate height of the inner surface facing the slide plate 41, and a bearing is provided at the lower end on the tip side of the projecting piece. The clamp piece rotating shaft 43b is pivotally supported by this bearing. In addition, a separate bearing for supporting the clamp piece rotation shaft 43b is formed on the upper surface of the slide plate 41.

  The clamp piece 43 and the variable plate 43a at the standby position perpendicular to the slide plate 41 rotate downward with respect to the slide plate 41 around the clamp piece rotation shaft 43b. It moves to the side and can be moved to a position where the left and right ends of the bag opening portion first bent piece 92 are sandwiched up and down.

  A clamp piece 43 and a variable plate 43a at a stand-by position perpendicular to the slide plate 41 are provided on the upper surface side of the left and right slide plates 41 projecting in an L shape toward the first bent plate 32 side. Clamp piece rotating cylinders 44 are attached to rotate downward with respect to the slide plate 41 around the center. As the clamp piece rotating cylinder 44, for example, a pencil cylinder is used.

  The clamp piece rotation cylinder 44 is attached in the outward direction from the end of the first bent plate 32. The tip end side of the piston rod of the clamp piece rotation cylinder 44 is pivotally connected to a bracket attached to the inner surface facing the slide plate 41 at the rear end of the variable plate 43a toward the slide plate 41 side. The clamp piece rotation cylinder 44 extends the piston rod to rotate the clamp piece 43 downward, and contracts upward to return the clamp piece 43 to the standby position.

  The bag opening side surface folding mechanisms 5 and 6 are arranged on the left and right sides of the gusset bag 9 that faces diagonally upward on the bag opening sealing work table 2 immediately before being folded by the first folding plate 32 of the bag opening first folding mechanism 3. This is a device that gently folds the side surface of the bag opening portion toward the inside of the bag opening portion 91 at the same time, and helps smooth the folding operation by the bag opening portion first folding mechanism 3.

  The bag opening side surface bending mechanism 5 provided on the outer side of the bag opening portion sealing work table 2 is attached to the frame 11 of the bag opening portion bending apparatus 1 so as to be able to advance and retract toward the gusset bag 9. Further, the bag opening side folding mechanism 6 located inside the bag opening sealing work table 2 is obstructed when the gusset bag 9 slides sideways, so that the bag of the gusset bag 9 does not get in the way. The bag opening first folding mechanism 3 that moves up and down toward the opening 91 is attached to the side surface of the first surface retaining plate 34 so as to be able to advance and retreat toward the gusset bag 9.

  The bag opening side surface bending mechanism 5 includes a bag opening side surface bending plate 51 that bends the bag opening side surface lightly toward the inside of the bag opening 91, a side holding plate 52 that holds the bag side surface, and a bag opening side surface folding. It comprises a bag opening side bent plate rotating cylinder 53 that rotates to bend the bent plate 51, a bag opening side bent plate advancing / retracting cylinder 54 that advances and retracts the side holding plate 52, and the like.

  The bag opening side surface bending mechanism 6 includes a bag opening side surface bending plate 61 that gently folds the bag opening side surface toward the inside of the bag opening 91, a side holding plate 62 that holds the bag side surface, and a bag opening side folding. It comprises a bag opening side bent plate rotating cylinder 63 that rotates to bend the bent plate 61, a bag opening side bent plate advancing / retracting cylinder 64 that advances and retracts the side holding plate 62, and the like.

  The bag opening portion side bent plate 51 is formed in a triangular shape with the front half portion protruding forward. On the base end side of the bag opening side surface bending plate 51, a side surface bending plate rotating shaft 51a that rotates about an orthogonal axis orthogonal to the obliquely upward state at the sealing work position is attached. The side bent plate rotation shaft 51 a is supported by a bearing (not shown) of the bag opening side bending mechanism 5. The bag opening side bent plate 51 is lightly bent toward the inner side of the bag opening 91 with the side of the bag opening just before being bent by the first bent plate 32 with the side bent plate rotation shaft 51a as a fulcrum.

  On the base end side of the bag opening side surface bending plate 61, a side surface bending plate rotating shaft 61a that rotates about an orthogonal axis orthogonal to the obliquely upward state at the sealing work position is attached. The side bent plate rotation shaft 61 a is supported by a bearing (not shown) on the side surface of the first surface retaining plate 34. The bag opening side bent plate 61 is lightly bent toward the inner side of the bag opening 91 with the side of the bag opening just before being bent by the first bent plate 32 with the side bent plate rotation shaft 61a as a fulcrum.

  On the bag opening sealing work table 2, a side holding plate 52 is attached to the back side of the bag opening side folding plate 51 to hold the bag side that is on the same side as the bag opening side surface of the gusset bag 9 that faces diagonally upward. It has been. The side retaining plate 52 functions to stop the gusset bag 9 containing the contents that have been slipped and sent at the sealing work position of the bag opening 91. Further, the side holding plate 52 sometimes presses the side surface of the bag during the sealing operation of the bag opening 91 of the gusset bag 9, and is held between the side holding plate 62 on the opposite side and the both sides from time to time. When the contents in the bag opening 91 are pressed by the bag opening pressing plate of the bag opening pressing mechanism 8, the gusset bag 9 is prevented from moving left and right.

  A side retaining plate 62 that holds the side of the bag that is on the same side as the side of the bag opening of the gusset bag 9 obliquely upward on the bag opening sealing work table 2 is attached to the rear side of the bag opening side folding plate 61. It has been. The side holding plate 62 sometimes presses the side of the bag during the sealing operation of the bag opening 91 of the gusset bag 9 and holds it from both sides of the side holding plate 52 on the opposite side. When the contents in the bag opening 91 are pressed by the bag opening pressing plate of the opening pressing mechanism 8, the gusset bag 9 is prevented from moving left and right.

  On the rear side of the bag opening side surface folding plate 51, the bag opening side surface folding that rotates the bag opening side surface folding plate 51 toward the inside of the bag opening 91 with the side bending plate rotation shaft 51 a as a fulcrum. A curved plate rotating cylinder 53 is attached. The bag opening side bending plate rotating cylinder 53 is attached to the bag opening side bending mechanism 5. In the bag opening side bent plate rotating cylinder 53, the piston rod extends when the bag opening side bent plate 51 is bent.

  On the rear side of the bag opening side surface folding plate 61, the bag opening side surface folding that rotates the bag opening side surface folding plate 61 toward the inside of the bag opening portion 91 with the side folding plate rotation shaft 61 a as a fulcrum. A curved plate rotating cylinder 63 is attached. The bag opening side bent plate rotating cylinder 63 is attached to the side surface of the first surface retaining plate 34. In the bag opening side bent plate rotating cylinder 63, the piston rod extends when the bag opening side bent plate 61 is bent.

  The side surface of the bag opening that causes the bag opening side surface bending plate 51, the side surface holding plate 52, and the bag opening side surface bending plate rotation cylinder 53 of the bag opening side surface bending mechanism 5 to move forward or backward toward the gusset bag 9. A bent plate advance / retreat cylinder 54 is attached. The bag opening side folding plate advance / retreat cylinder 54 is attached to the frame 11 of the bag opening bending apparatus 1. In the bag opening portion side bent plate advance / retreat cylinder 54, the piston rod extends when the side surface of the gusset bag 9 is pressed.

  The side surface of the bag opening that causes the bag opening side surface bending plate 61, the side surface holding plate 62, and the bag opening side surface bending plate rotation cylinder 63 of the bag opening side surface bending mechanism 6 to move forward or backward toward the gusset bag 9. A bent plate advance / retreat cylinder 64 is attached. The bag opening portion side bent plate advance / retreat cylinder 64 is attached to the side portion of the first surface retaining plate 34. In the bag opening side bent plate advance / retreat cylinder 64, the piston rod extends when the side face of the gusset bag 9 is pressed.

  The bag opening side bent plate rotation cylinders 53 and 63 are set to operate simultaneously. Further, the bag opening side bent plate rotating cylinders 53 and 63 operate to bend the bag opening side bent plates 51 and 61 twice in the sealing operation of the bag opening 91, of which 1 The second time, the side of the bag opening is bent at an angle of about 45 degrees before grasping by the clamp mechanism 4, and the second time, the angle of the side of the bag opening is about 90 degrees slightly faster than that of the first folding plate 32. It is set to be bent. Similarly, the bag opening side bent plate advance / retreat cylinders 54 and 64 are set to operate simultaneously.

  The bag opening second folding mechanism 7 faces the bag opening second bent piece 93 of the gusset bag 9 diagonally upward on the bag opening sealing work table 2 upward, that is, the bag opening second folded already. It is a device that bends toward the upper surface side of the folded piece 92, and is attached to the frame 11 of the bag opening bending device 1 below the obliquely upward extension line on the bottom surface of the bag opening sealing work table 2 that is inclined obliquely upward. Is provided. The bag opening portion second bending mechanism 7 includes a tilt plate 71, a second bent plate 72, a second bent plate rotating cylinder 73, and the like.

  The tilting plate 71 is attached to the lower side of the obliquely upward extension line of the bottom surface of the bag opening sealing work table 2 inclined obliquely upward. The tip end side of the tilting plate 71 is attached so as to be movable in the vertical direction with respect to the bag opening portion sealing work table 2. The base end side of the raising / lowering operation lever 71b is integrally connected to the upper part of the tilting plate 71 on the side away from the bag opening portion sealing work table 2 via the raising / lowering rotating shaft 71a. The up-and-down rotation shaft 71a is pivotally supported by a bearing attached to the frame 11 of the bag opening part bending apparatus 1.

  The tip end of the piston rod of the tilting plate lifting cylinder 71c is pivotally connected to the tip of the lifting operation lever 71b. The tilting plate elevating cylinder 71c rotates the tilting plate 71 up and down around the elevating rotation shaft 71a, and moves the tip end side of the tilting plate 71 up and down toward the bag opening 91 of the gusset bag 9. The tilting plate elevating cylinder 71c is mounted upward on a bracket protruding from the frame 11 of the bag opening bending apparatus 1.

  When the piston rod of the tilting plate lifting cylinder 71c extends upward, the tip side of the tilting plate 71 moves upward. When the sealing operation of the bag opening 91 of the gusset bag 9 is completed and the bag opening sealing work table 2 is inclined downward to convey the gusset bag 9, the tip side of the tilt plate 71 is moved upward. .

  The second folding plate 72 is a plate that directly bends the bag opening second bent piece 93 of the gusset bag 9 upward, that is, directly toward the upper surface side of the bag opening first bent piece 92 that has already been bent. It has a rectangular plate shape that is horizontally long. The horizontally long second bent plate 72 has a width that is slightly shorter than the left and right width of the bag opening second bent piece 93 to be bent. Moreover, the short vertical width direction length of the rectangle of the 2nd bending board 72 is as large as the vertical width length from the front-end | tip of the bag opening part 91 of a bag opening part 2nd bending piece 93 to a bending location. It has become.

  Both sides of the second folding plate 72 sandwiching the lower center portion on the lower end side when the second folding plate 72 is bent upward are connected to the tip of a connecting girder (not shown) attached obliquely upward from the tilting plate 71. It is connected through a moving shaft 72a so as to be rotatable up and down. The second bent plate 72 is rotatable up and down about the second bent plate rotating shaft 72a. That is, the second bent plate 72 rotates upward with the second bent plate rotating shaft 72a as a fulcrum to bend the bag opening second bent piece 93 upward.

  A second folding plate rotation cylinder 73 that rotates the second folding plate 72 in the vertical direction with the second folding plate rotation shaft 72 a as a fulcrum is attached to the lower side of the second folding plate 72. . The second bent plate rotation cylinder 73 is attached to the tip side of the tilt plate 71 obliquely upward. In the second bent plate rotating cylinder 73, the piston rod extends obliquely upward to rotate the second bent plate 72 upward and contract downward to return the second bent plate 72 to the standby position.

  The bag opening pressing mechanism 8 seals the gusset bag 9 that is obliquely upward on the bag opening sealing work table 2 after being bent by the second folding plate 72 of the bag opening second bending mechanism 7. The bag opening sealing work table 2 which is inclined obliquely upward is a device which further presses the portion and further enhances the adhesion of the bag opening second bending piece 93 to the upper surface of the bag opening first bending piece 92. It is provided on the frame 11 of the bag opening bending device 1 on the diagonally upward extension line of the bag opening 91 of the upper gusset bag 9. The bag opening portion pressing mechanism 8 includes a bag opening portion pressing plate 81, a pressing plate advance / retreat cylinder 82, and the like.

  The bag opening retainer plate 81 directly presses the sealed portion of the gusset bag 9 and has a rectangular plate shape with a size that can be inserted into the bag opening 91 of the gusset bag 9. The front end side of the piston rod of the presser plate advance / retreat cylinder 82 is connected to the rear surface of the bag opening part presser plate 81. The presser plate advance / retreat cylinder 82 is attached in parallel to the bag opening sealing work table 2 inclined obliquely upward, and is attached to the frame 11 of the bag opening bending apparatus 1.

Next, the operation based on the configuration of the best mode for carrying out the invention will be described below.
When the gusset bag 9 is filled with contents at a bagging work table (not shown) on the side of the bag opening sealing work table 2, the bag opening 91 of the gusset bag 9 filled with the contents is obliquely upward. After being brought into a state, it is slid as it is and moved onto the bag opening sealing work table 2.

  The side retaining plate 52 of the bag opening side folding mechanism 5 provided outside the bag opening sealing work table 2 is slightly advanced by the bag opening side folding plate advancing / retreating cylinder 54 so that the contents are transferred. The filled gusset bag 9 is stopped at a predetermined sealing work position. The bag opening retainer plate 81 of the bag opening retainer mechanism 8 is advanced by the retainer plate advancing / retracting cylinder 82 to enter the bag opening 91 of the gusset bag 9 and contact the front end side of the filled contents. Detects the distance to the tip of the object and moves back immediately.

  The bag opening first folding mechanism 3 descends by the action of the elevating girder 31 and presses the first surface on the upper side of the gusset bag 9 on the bag opening sealing work table 2 by the first surface pressing plate 34. . This prevents the gusset bag 9 from moving up and down. At this time, the slide plates 41 of the clamp mechanism 4 on both ends of the first bent plate 32 come down from the open state to the closed state. The clamp pieces 43 projecting downward from both side ends of the slide plate 41 lightly press both side surfaces of the bag opening 91 of the gusset bag 9.

  Subsequently, the right and left bag opening side surface bending mechanisms 5 and 6 operate, and the bag opening side surface bending plates 51 and 61 bend the both side surfaces of the bag opening 91 twice. Bend at a shallow angle the first time. By the first folding, both side surfaces of the bag opening 91 are deformed in a V shape toward the inside.

  As soon as the first folding is performed, the clamp pieces 43 of the clamp mechanism 4 on both ends of the first bent plate 32 rotate around the clamp piece rotation shaft 43b by the action of the clamp piece rotation cylinder 44. Then, it immediately wraps around the lower surface side of the slide plate 41 and grips both sides of the bag opening 91 between the lower surface of the slide plate 41 and the upper surface of the clamp piece 43.

  The bag opening side surface folding plates 51 and 61 perform the second folding at a deep angle of about 90 degrees. In almost the same manner, both sides of the bag opening 91 are formed by the slide plate 41 and the clamp piece 43. In a state where the surface is gripped, the first folding plate 32 is bent downward, that is, bent at an angle of approximately 90 degrees toward the bag opening 91. The slide plate 41 and the clamp piece 43 holding both side surfaces of the bag opening 91 are bent together with the first folding plate 32.

  In this way, the bag opening portion first bent piece 92 of the gusset bag 9 is gripped by the slide plates 41 and the clamp pieces 43 on both sides of the first bent plate 32 where both side surfaces of the bag opening portion 91 are bent. Since the gusset bag 9 filled with the contents is folded together, the gusset bag 9 filled with the contents can be reliably folded at a certain folding position even when the contents are not in the vicinity of the bag opening 91. .

  At this time, the bag opening side surface folding plates 51 and 61 are bent slightly faster than the first folding plate 32 and are retracted to the left and right sides immediately before the first folding plate 32 is completely folded. There is no contact with the left and right clamp pieces 43 of the curved plate 32.

  Further, after folding the bag opening first folding piece 92 of the gusset bag 9 at a substantially right angle with the first folding plate 32, the slide plates 41 and the clamp pieces 43 on the left and right ends of the first folding plate 32 are gripped. In the same state as that, the gusset bag 9 is slid toward the left and right sides and separated. And after these have separated, the 1st bending board 32 moves to the upper side and leaves | separates from the location where the bag opening part 1st bending piece 92 of the gusset bag 9 was bent.

  At the same time as the first bent plate 32 stops on the upper side, the slide plate 41 slides to the left and right outer sides to return to the left and right side end positions of the first bent plate 32. The clamp piece 43 that has come to the lower surface of the plate 41 also rotates in the reverse direction about the clamp piece rotation shaft 43b and returns to the original return position.

  Further, the slide plate 41 and the clamp piece 43 on both the left and right ends of the first bent plate 32 begin to slide away from the side ends of the first bent plate 32, and at the same time, the piston of the second bent plate rotating cylinder 73. The rod extends upward, and the second folded plate 72 pivots upward about the second folded plate pivot shaft 72a, and the bag of the gusset bag 9 on the bottom surface side of the bag opening sealing work table 2 is obtained. The opening second bent piece 93 is bent upward at a substantially right angle. The folded bag opening portion second bent piece 93 is in close contact with the upper surface side of the already folded bag opening portion first bent piece 92.

  The first folding plate 32 that has folded the bag opening first folding piece 92 immediately before the second folding plate 72 completely folds the bag opening second folding piece 93 of the gusset bag 9 moves upward. Therefore, the first bent plate 32 and the second bent plate 72 do not contact each other.

  When the second folding plate 72 is folded, the second folding plate 93 of the second folding plate rotating cylinder 73 contracts downward after the folding of the second folded piece 93 of the bag opening, and the second folding plate 72 is folded in the second folding. It rotates downward about the curved plate rotation shaft 72a and returns to the original standby position.

  Simultaneously with the return of the second folding plate 72 to the standby position, the bag opening retainer plate 81 of the bag opening retainer mechanism 8 advances by the extension of the piston rod of the retainer plate advance / retreat cylinder 82 and has already been bent. The surface of the bag opening part 2nd bending piece 93 bent so that it may closely_contact | adhere to the upper surface side of the bag opening part 1st bending piece 92 is pressed down.

  At the same time, the side surface holding plates 52 and 62 of the right and left bag opening side surface bending mechanisms 5 and 6 approach the side surface of the gusset bag 9 and are sandwiched from both sides. The side surface of the gusset bag 9 is sandwiched between the side surface retaining plates 52 and 62, and the upper and lower surfaces are sandwiched between the first surface retaining plate 34 and the bottom surface of the bag opening sealing work table 2.

  In this way, the gusset bag 9 is pressed on the sealed surface in a state in which the up / down / left / right movement is prevented. Thereby, adhesion of the bag opening part 2nd bending piece 93 with respect to the upper surface side of the bag opening part 1st bending piece 92 can be improved.

  When the sealed surface of the gusset bag 9 is pressed, the bag opening pressing plate 81 of the bag opening pressing mechanism 8 is retracted by the contraction of the piston rod of the pressing plate advance / retreat cylinder 82 and returns to the original standby position. . Thereafter, the piston rod of the work table tilting cylinder 22 of the bag opening sealing work table 2 contracts, so that the bag opening sealing work work table 2 inclined obliquely upward is directed downward about the work table rotating shaft 21. Rotate to tilt diagonally downward. When tilted downward, the sealed gusset bag 9 on the bag opening sealing work table 2 is discharged from the bag opening sealing work table 2 and conveyed by the conveyor 12.

  In this way, the sealing operation of the gusset bag 9 filled with the contents is completed. Thereafter, the same operation is repeated. The sealing operation for one gusset bag 9 is performed in a short time of about 10 seconds.

  Note that the present invention is not limited to the best mode for carrying out the invention, and various modifications can be made without departing from the spirit of the invention.

It is a principal part side view of the bag opening part bending apparatus which shows the best form for implementing this invention. (A) is a schematic partial plan view of the bag opening part bending apparatus which shows the best form for implementing this invention. (B) is a schematic partial front view of a bag opening bending apparatus showing the best mode for carrying out the present invention. It is a partial side view of the bag opening part 91 1st bending mechanism of the bag opening part bending apparatus which shows the best form for implementing this invention. (A) is a top view of the 1st bending board of the bag opening part bending apparatus which shows the best form for implementing this invention. (B) is the edge part side view of the 1st bending board of the bag opening part bending apparatus which shows the best form for implementing this invention. It is a front view of the 1st bending board of the bag opening part bending apparatus which shows the best form for implementing this invention. It is a work figure just before the bending of the 1st bending board of the bag opening part bending apparatus which shows the best form for implementing this invention. It is a work figure in the middle of bending of the 1st bending board of the bag opening part bending apparatus which shows the best form for implementing this invention. It is a work figure just after the bending of the 1st bending board of the bag opening part bending apparatus which shows the best form for implementing this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bag opening part bending apparatus 11 Frame 12 Conveyor 2 Bag opening part sealing work table 21 Worktable rotating shaft 22 Worktable tilting cylinder 3 Bag opening part 1st bending mechanism 31 Elevating girder 31a Bracket 31b Elevating girder rotating axis 31c Elevating girder operating lever 31d Elevating girder lower moving cylinder 31e Suspension plate 32 First bent plate 32a First bent plate rotating shaft 32b Bracket 33 First bent plate rotating cylinder 34 First surface retaining plate 35 Elevating cylinder 4 Clamping mechanism 41 Slide plate 42 Slide actuator 43 Clamp piece 43a Variable plate 43b Clamp piece rotating shaft 44 Clamp piece rotating cylinder 5 Bag opening side folding mechanism 51 Bag opening side folding plate 51a Side folding plate rotation Moving shaft 52 Side stop plate 53 Bag opening side bent plate rotation cylinder 54 Bag opening side bent plate advance / retreat cylinder 6 Bag Mouth side surface bending mechanism 61 Bag opening side surface bending plate 61a Side surface bending plate rotation shaft 62 Side surface holding plate 63 Bag opening side surface bending plate rotation cylinder 64 Bag opening side surface bending plate advance / retreat cylinder 7 Bag Opening portion second bending mechanism 71 Tilt plate 71a Elevating rotation shaft 71b Elevating operation lever 71c Tilt plate elevating cylinder 72 Second folding plate 72a Second folding plate rotation shaft 73 Second folding plate rotation cylinder 8 Bag Opening holding mechanism 81 Bag opening holding plate 82 Holding plate advance / retreat cylinder 9 Gusset bag 91 Bag opening 92 Bag opening first bent piece 93 Bag opening second bent piece

Claims (2)

After filling the bag having the thickness storage space with both side surfaces with the contents, the bag opening portion having the first folding plate for folding the bag opening portion first folding piece toward the inside of the bag opening portion A bag opening portion second bending mechanism comprising a one folding mechanism and a second folding plate for bending the bag opening portion second bending piece so as to overlap the upper surface side of the folded bag opening portion first bending piece. A bag opening bending device that automatically bends and seals the bag opening filled with the contents by the cooperation of the bag opening first bending mechanism and the bag opening second bending mechanism A clamping mechanism for gripping the left and right ends of the first folded piece and bending it together with the first folded plate immediately before folding the first folded piece of the bag opening. The bag opening part bending apparatus provided in the side. After filling the bag having the thickness storage space with both side surfaces with the contents, the bag opening portion having the first folding plate for folding the bag opening portion first folding piece toward the inside of the bag opening portion A bag opening portion second bending mechanism comprising a one folding mechanism and a second folding plate for bending the bag opening portion second bending piece so as to overlap the upper surface side of the folded bag opening portion first bending piece. A bag opening bending device that automatically bends and seals the bag opening filled with the contents by the cooperation of the bag opening first bending mechanism and the bag opening second bending mechanism A clamping mechanism for gripping the left and right ends of the first folded piece and bending it together with the first folded plate immediately before folding the first folded piece of the bag opening. And the clamp mechanism is slid from the left and right ends of the first bent plate toward the outside. The side end of the bag opening first bent piece between the slide plate attached to the slide plate and the lower end of the slide plate that is movably attached to the side end side of the slide plate A bag opening bending device characterized by comprising a clamp piece that sandwiches and holds the bag.

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