JP4613192B2 - Opening device - Google Patents

Description

  The present invention relates to a box opening device for opening a plastic box.

  Conventionally, cardboard boxes (cartons) have been used as packaging cases for cosmetics and medicines. Recently, however, they are transparent or translucent plastic boxes (also called plastic cartons) because they look good in store displays. Appeared on the market. Such a plastic box is not used for storing and transporting a rectangular tube box as an empty box, but for storing and transporting it in a folded state, and packing products such as cosmetics and drugs into the box. It was opened (opened) to form a rectangular cylindrical box. However, since the box opening device (also called a cartoning machine) that automates this box opening operation cannot remove the folding folds of the plastic box, the box has a substantially parallelogram opening. In addition, a transport holding member that transports while holding the side wall of the box is necessary (see, for example, Patent Document 1).

However, in the case of the box opening device that transports while constantly holding the side wall of the box body in this way, when carrying out a box body design change or other box body opening work, it is transported according to the size of the box body It was necessary to replace the holding member such as a turret, and the economical efficiency such as replacement part cost and replacement work time was low.
JP 2004-238040 A

  Therefore, an object of the present invention is to provide a box opening device for opening a plastic box.

The box opening device according to the present invention is:
Opening the plastic box body in which at least the fourth wall portion is in close contact with the first wall portion and at least the third wall portion is in close contact with the second wall portion, and the first box portion is folded. In the box opening device that forms a box-shaped box with a rectangular cylindrical shape in which the wall portion and the second wall portion face each other and are spaced apart from each other,
A first suction pad that is sucked to the first wall portion of the folded box,
A second suction pad adsorbing to the second wall portion;
A moving mechanism for moving the first suction pad relative to the second suction pad;
A first push bar that contacts a first corner connecting the first wall and the fourth wall;
Have
The moving mechanism moves the first wall portion of the folded box body away from the fourth wall portion, and further until the first wall portion is in close contact with at least the third wall portion. Move the first suction pad ,
The first push bar presses the first corner portion against the second wall portion when the first wall portion comes into close contact with the third wall portion by the moving mechanism .

  According to the box opening device of the present invention, the first wall portion of the folded box body is moved away from the fourth wall portion by the moving mechanism, and the first wall portion is in close contact with the third wall portion. The folding box can be removed by folding it back up. Therefore, the box supplied to the box opening device is opened (opened) from the folded state, and further folded to the opposite side beyond the opened state, so that even a plastic box can be opened It can be maintained in a desired rectangular tube shape. Therefore, according to the box opening device of the present invention, a transport holding member for transporting while constantly holding the side wall portion as in the prior art becomes unnecessary, and the cost is excellent.

  According to the box opening device of the present invention, by pressing the first corner with the first push rod, it is possible to surely remove the folded folds by expanding the first folded corner. . Therefore, according to the box opening device of the present invention, the box opening state of the box can be made into a more accurate desired square cylinder by having the first push rod.

In the box opening device according to the present invention,
When the first wall portion comes into close contact with the third wall portion by the moving mechanism, the second corner portion connecting the first wall portion and the third wall portion is pressed in the bending direction. It can have a second push rod.

  According to the box opening device of the present invention, the second corner portion is pressed by the second push rod, so that the second corner portion that has been linear at the time of folding is surely bent and deformed, so that the extended state is achieved. Can remove wrinkles reliably. Therefore, according to the box opening device of the present invention, the box opening state of the box can be made into a more accurate desired rectangular tube shape.

In the box opening device according to the present invention,
The moving mechanism includes a rotating mechanism that rotates and moves the first suction pad, and a linear moving mechanism that applies a driving force to the rotating mechanism,
The rotation mechanism is a rack-and-pinion mechanism having a pinion and a first rack and a second rack that are opposed to each other and mesh with the pinion.
The first rack and the second rack may have a connected portion that can be connected to the linear movement mechanism by a fixing member.

  According to the box opening device of the present invention, the box opening operation can be easily performed by converting the driving force from the linear movement mechanism into the rotational movement by the rack and pinion mechanism. Also, by preparing two racks for one pinion in advance, for example, even if the box folding direction is reversed, the connection of the fixing member can be changed from the first rack to the second rack. Since the rotational movement direction of the first suction pad can be reversed, a box opening operation is possible.

In the box opening device according to the present invention,
The connected portion is a hole formed in the first rack and the second rack;
The fixing member may be a pin that passes through the linear movement mechanism and is inserted into one of the holes.

  According to the box opening device of the present invention, the rotation mechanism can be operated in either forward or reverse rotation by inserting the pin into the hole of the first rack or the second rack. Therefore, even with the driving force of the same linear movement mechanism, the rotation direction of the rotation mechanism can be easily reversed only by replacing the pin.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing a rectangular box-shaped plastic box body 30 opened. FIG. 2 is a plan view of the plastic box body 30 in a folded state. FIG. 3 is a schematic front view of the box opening device 1. FIG. 4 is a schematic front view of the box opening portion 5 of the box opening device 1. FIG. 5 is a schematic side view of the box opening unit 5 of the box opening device 1 as viewed from the box loading unit 3 side. FIG. 6 is a front view schematically showing the structure of the rotation mechanism 51 of the box opening unit 5. FIG. 7 is a schematic rear view of the open box portion 5. 8 and 9 are schematic views showing a box opening process of the box 30. FIG.

  In the box opening device 1 according to the present embodiment, at least the fourth wall portion 34 is in close contact with the first wall portion 31 and at least the third wall portion 33 is in close contact with the second wall portion 32. A box opening device for opening a folded plastic box 30 to form a box 30 with a rectangular tube shape in which the first wall 31 and the second wall 32 face each other and are spaced apart from each other. 1, the first suction pad 64 that is sucked to the first wall portion 31 of the folded box 30, the second suction pad 84 that is sucked to the second wall portion 32, and the first suction pad 64. And a first moving mechanism 50 that moves relative to the second suction pad 84, and the first moving mechanism 50 moves the first wall portion 31 of the folded box 30 to the first Until the first wall 31 is in close contact with at least the third wall 33. Move the suction pads 64 of the.

(Box 30)
As shown in FIG. 1, the box 30 in an opened state includes a wide first wall portion 31 and a second wall portion 32 that are arranged to face each other, and a first wall portion 31 and a second wall. It has the 3rd wall part 33 and the 4th wall part 34 which connected the part 32 at the edge part, and was opposingly arranged, and it becomes a square cylinder shape in the opened state. The rectangular cylindrical box 30 has four corners 311, 312, 313, and 314 that connect the four wall portions 31, 32, 33, and 34 at right angles, and the first corner 311 is the first corner 311. The second wall 312 connects the first wall 31 and the third wall 33, and the third corner 313 connects the second wall 31 and the fourth wall 34. The wall portion 32 and the fourth wall portion 34 are connected, and the fourth corner portion 314 connects the second wall portion 32 and the third wall portion 33. On both open end sides of the box body 30, there are inner flaps 39 </ b> A, 39 </ b> B that are folded into the open ends, and outer flaps 35, 37. Have

  As shown in FIG. 2, the box 30 in the folded state has the first corner 311 and the fourth corner 314 bent so that at least the fourth wall 34 is in relation to the first wall 31. The second corner 312 and the third corner 313 extend flatly, and at least the third wall 33 is in close contact with the second wall 32. In the present embodiment, since the first wall portion 31 and the second wall portion 32 of the box body 30 are formed wider than the third wall portion 33 and the fourth wall portion 34, the box body In the folded state 30, the second wall portion 32 and the fourth wall portion 34 are in close contact with the first wall portion 31, and the first wall portion 31 and the third wall portion 32 are in close contact with the second wall portion 32. The wall 33 is in close contact. In the folded box 30, the fourth wall 34 is in close contact with the first wall 31, and the third wall 33 is in close contact with the second wall 32. However, they are not necessarily in close contact with each other, and may be slightly opened in a parallelogram shape having a slight gap and a low height. The box 30 is stored and transported in such a folded state from when the box 30 is produced until the box opening operation for packing the contents, for example, a cosmetic container. An arrow A in FIGS. 1 and 2 indicates a conveyance direction of the box 30 in the box opening device 1.

(Overall configuration of the box opening device 1)
As shown in FIG. 3, the box opening device 1 includes a box body loading unit 3 in which a large number of folded plastic box bodies 30 are stacked on the machine base 2 in the vertical direction, and a supply unit 4 below the box body loading unit 3. An opening portion 5 for opening the box 30, an inner flap bending portion 6 for folding the inner side flaps 39 </ b> A, 39 </ b> A on the front side of the box opening device 1, and an insertion piece bending portion for bending the insertion piece 36 upward. 7, opening the box 30 in which only one end of the opened box 30 is opened, and the insertion part 8 into which the insertion piece 36 is inserted inside the first wall 31 while bending the outer flap 35. A discharge unit 9 that discharges from the apparatus 1 is disposed along the conveyance direction A of the box 30. In the machine base 2, a servo motor 10 indicated by a dotted line and a rotating shaft 11 that transmits a driving force of the servo motor 10 are arranged. A belt 18 is stretched between the sprocket 14 and the sprocket 16 disposed at both ends in the transport direction A of the machine base 2, and the box 30 is intermittently transported by the belt 18 from the supply unit 4 to the discharge unit 9. The sprocket 14 follows the sprocket 12 connected to the rotating shaft 11 in the machine base 2. In addition, a plurality of cam mechanisms (not shown) that are rotated by the rotation shaft 11 are provided in the machine base 2 below the operation units 4, 5, 6, 7, 8, 9. Therefore, when the rotating shaft 11 is rotated by the servo motor 10, the operation units 4, 5, 6, 7, 8, and 9 are operated synchronously by a plurality of cam mechanisms (not shown) fixed to the rotating shaft 11, and the sprocket is operated. 14 rotates and the belt 18 also operates synchronously.

(Box loading unit 3 and supply unit 4)
As shown in FIG. 3, the box body loading unit 3 stacks a number of folded plastic box bodies 30 in the vertical direction and loads them from above, and the box body in the supply unit 4 at the lower end of the box body loading unit 3. 30 are supplied onto the belt 18 one by one. The supply unit 4 has a suction pad (not shown) that moves up and down from the machine base 2 toward the box body loading unit 3, and the suction pad rises and the box 30 at the lower end of the box body loading unit 3. Adsorption to the second wall 32 and the boxes 30 are reliably lowered onto the belt 18 one by one, and then the adsorption is released.

(Open box part 5)
As shown in FIGS. 4 to 7, the box opening portion 5 of the box opening device 1 includes a first suction pad fixing member 60 and a second lifting member 82. The first suction pad fixing member 60 has a first suction pad 64 that sucks the first wall portion 31 above the folded box 30 and two first suction pads 64 that contact the first corner portion 311. The push rod 66A and the two second push rods 66B contacting the second corner are suspended and fixed. The second elevating member 82 includes a second suction pad 84 that is attracted to the second wall 32 below the folded box 30, and four third contacts that are in contact with the four corners of the second wall 32. The push rod 86 is fixed upright. In FIG. 7, for ease of understanding, the box body 30 is drawn in a parallelogram shape with a slight opening, but the normal box body 30 is composed of the first wall portion 31 and the second wall portion 32. There is only a slight gap so that it is almost in close contact, and it is folded into a single plate.

  The open box unit 5 includes a first moving mechanism 50 that moves the first suction pad 64 relative to the second suction pad 84 and a second movement mechanism 81 that moves the second suction pad 84 up and down. And having. The first moving mechanism 50 includes a rotating mechanism 51 that rotates and moves the first suction pad 64 while maintaining its horizontal state, and a linear moving mechanism 40 that applies a driving force to the rotating mechanism 51. The rotating mechanism 51 converts the linear motion of the linear moving mechanism 40 into rotational motion, rotates the rotating shaft 58, rotates the rotating member 59 connected to the rotating shaft 58, and is connected to the rotating member 59 by the connecting shaft 68. The first suction pad fixing member 60 is rotated. The linear movement mechanism 40 includes two first lift cam followers 42 that roll on a first lift cam 41 that rotates together with the rotation shaft 11 of the servo motor 10, and two first lift cam followers 42 that rotatably support the first lift cam follower 42. The first elevating rod 44 and a first elevating member 46 fixed to the upper end of the first elevating rod 44 are provided.

  As shown in FIG. 6, the rotation mechanism 51 has a rotation mechanism fixing member 510 having a lower end fixed to the machine base 2 and extending upward from the belt 18, and a rotation mechanism fixing member 510 that is fixed to the rotation mechanism fixing member 510 and extends vertically. A pair of rails 512, 514, a pinion 56 that is rotatably arranged between the rails 512, 514, a first rack 52 and a second rack 54 that are opposed to each other and mesh with the pinion 56. And a rack and pinion mechanism. The pinion 56 is connected to a rotating shaft 58 that rotates the rotating member 59. When the pinion 56 rotates, the rotating member 59 also rotates about the rotating shaft 58. The first rack 52 and the second rack 54 are guided by rails 512 and 514 and can move in the vertical direction. Connection holes 55 are respectively provided on the sides of the first rack 52 and the second rack 54 facing the fixing member 48, and can be connected to the first elevating member 46 of the linear movement mechanism 40 by the fixing member 48. . The fixing member 48 includes a pin portion that passes through the first elevating member 46 and is inserted into a connection hole 55 formed in the first rack 52, and a handle portion that protrudes from the first elevating member 46. Have. Therefore, if the first elevating member 46 is raised, the first rack 52 connected by the fixing member 48 is raised to rotate the pinion 56 counterclockwise, and if the first elevating member 46 is lowered, the first rack 52 is moved. Can be lowered and rotated to the right. With such a structure of the rotation mechanism 51 and the linear movement mechanism 40, for example, if the pin portion of the fixing member 48 is replaced with the connection hole portion 55 of the second rack 54 and inserted, the first portion can be obtained. When the lifting / lowering member 46 is raised, the pinion can be rotated to the right, and when the first lifting / lowering member 46 is lowered, the pinion 56 can be rotated to the left. In this way, even with the same driving force of the linear movement mechanism 40, the rotation direction of the rotation mechanism 51 can be easily reversed. For example, even if the folding direction of the box 30 is reversed, the fixing member 48 The direction of rotational movement of the first suction pad 64 can be reversed simply by replacing the rack with another rack.

  The second moving mechanism 81 includes two second elevating cam followers 89 that roll on the second elevating cam 90 rotated by the rotation of the servo motor 10, and two second elevating cam followers 89 that rotatably support the second elevating cam follower 89. The second elevating rod 88 and a second elevating member 82 fixed to the upper end of the second elevating rod 88 extending upward from the machine base 2. The second elevating member 82 includes four second suction pads 84 that are sucked from the lower side to the second wall portion 32 of the folded box body 30 conveyed to the open box portion 5 by the belt 18; Four third push rods 86 that support the four corners of the second wall portion 32 from below are fixed. Therefore, the second lifting cam 90 is rotated by the rotation of the servo motor 10, and the second lifting member 82 is moved up and down according to the cam shape. Note that the suction pad described here has a sucker shape made of an elastic material such as rubber at the portion that comes into contact with the wall portion of the box, and has a substantially cylindrical shape that is air vacuumed (sucked) at all times or at least during suction operation. Things can be used.

  The rotation mechanism 51 can rotate the first suction pad fixing member 60 while maintaining the horizontal state by rotating the rotation member 59. The rotating member 59 rotates about a rotating shaft 58 connected to the rotating mechanism 51, and a connecting shaft 68 between the rotating member 59 and the first suction pad fixing member 60 is provided above the rotating shaft 58 in FIG. ing. In the first suction pad fixing member 60, the first and second push rods 66A and 66B and the first suction pad 64 are suspended and fixed, and the vertical guide member 62 is provided at the end on the rotating member 59 side. Two are fixed. Above the first suction pad fixing member 60, a horizontal guide rail fixing member 74 is fixed to a frame (not shown) on the base 2, and a horizontal guide rail 76 extending in the horizontal direction is fixed to the horizontal guide rail fixing member 74. Has been. A horizontal guide member 72 guided by the horizontal guide rail 76 and movable in the horizontal direction is provided on the vertical guide rail fixing member 70. The vertical guide rail fixing member 70 is a U-shaped plate body with a notch facing downward, and two vertical guide rails 71 extending downward from the horizontal guide member 72 are fixed thereto. The vertical guide member 62 of the first suction pad fixing member 60 is guided by the vertical guide rail 71 and can be moved up and down in the vertical direction. Therefore, when the rotating member 59 is rotated by the rotating mechanism 51, the connecting shaft 68 rotates and moves so as to draw a semicircular rotating track around the rotating shaft 58, and the first suction pad is aligned with the rotating track of the connecting shaft 68. The fixing member 60 is guided by the horizontal guide rail 76 and the vertical guide rail 71 and rotates while maintaining the horizontal state.

  Accordingly, in the open box portion 5 having such a configuration, at least the fourth wall portion 34 is in close contact with the first wall portion 31 and at least the third wall portion 33 is in close contact with the second wall portion 32. Then, the folded plastic box body 30 is opened, and the box body 30 is opened in a rectangular tube shape in which the first wall portion 31 and the second wall portion 32 face each other and are spaced apart from each other. Can do.

(Inner flap bent part 6 to discharge part 9)
As shown in FIG. 3, the box 30 opened by the opening box 5 is supported on the belt 18 while maintaining the square cylindrical shape, and each operating unit 6, 7 along the conveyance direction A. , 8, and 9 are sequentially intermittently conveyed. At this time, the box 30 is held in a rectangular tube shape by removing the folding folds in the open box portion 5, so that the shape of the box 30 is held so as not to be a parallelogram in cross section while being transported. There is no need for a retainer.
The inner flap folding part 6 folds the inner flaps 39A, 39A at one open end of the box 30 into the box. When the inner flaps 39A and 39A are folded, the first wall portion 31 and the second wall portion 32 of the box body 30 are sucked and fixed by suction pads (not shown) from above and below, and the inner flap 39A is fixed. , 39A is preferably bent until it comes into contact with or close to the inner surfaces of the third wall portion 33 and the fourth wall portion 34.
The insertion piece folding part 7 bends the insertion piece 36 of the box 30 in which the inner side flaps 39A, 39A are bent at a substantially right angle upward at a substantially right angle.
The insertion portion 8 inserts the insertion piece 36 into the opening of the box 30 while bending the outer side flap 35 in which the insertion piece 36 is bent upward. Naturally, since the insertion piece 36 enters the inside of the first wall portion 31 and bends the outer flap 35, the outer flap 35 does not easily spread outward, and the opening of the box 30 can be reliably closed. In addition, the insertion piece bending part 7 and the insertion part 8 also adsorb | suck the 1st wall part 31 and the 2nd wall part 32 of the box 30 from the upper and lower sides with the suction pad which is not shown in figure like the inner side flap bending part 6. Then, the bending operation is performed with the positioning fixed.
The discharge unit 9 discharges the box 30 in which one end of the box 30 is closed with the outer flap 35 or the like so as to push the box 30 toward the back side of the box opening device 1. A cam mechanism (not shown) that is rotated by the servo motor 10 is also provided in the machine base 2 corresponding to each of the operation units 6, 7, 8, 9 and operates in synchronization with the other operation units.

(Explanation of operation of the open box part 5)
FIG.8 and FIG.9 is a schematic diagram explaining the box opening operation | movement in the box opening part 5 in order of (A)-(F). Each operation will be described in the order of (A) to (F).
FIG. 8 (A)
The boxes 30 folded from the supply unit 4 are placed on the belt 18 and conveyed one by one to the open box unit 5. Between the belts 18, a cylindrical stopper 80 rises from below the belt 18, and sets the front and rear ends of the box 30 in the transport direction A to a predetermined position between the belt 18 and the protrusions 19. At this time, the first suction pad fixing member 60 stands by at the same initial position as in FIG. 8C, and the second lifting member 82 has the second suction pad 84 and the tip of the third push rod 86 on the belt 18. Is waiting at a lower position where it does not come into contact with the box body 30 conveyed.
FIG. 8 (B)
The rotating member 59 rotates counterclockwise in the figure, and the first suction pad fixing member 60 rotates while maintaining the level of the tips of a plurality of, for example, four first suction pads 64, and the first suction pad 64 and the first suction pad 64 1. The second push rods 66 </ b> A and 66 </ b> B are put on standby at a position above the box body 30. Then, the second suction pad 84 and the third push rod 86 rise from below the box 30, the second suction pad 84 is sucked to the second wall portion 32, and the third push rod 86 is the third push rod 86. The box body 30 is lifted to the box opening work position by supporting the second wall portion 32 from below so that two corner portions 313 and four corner portions 314 are in contact with each other. In the box opening work position, the first suction pad 64 is sucked to the first wall portion 31 and the lower ends of the first and second push rods 66A and 66B are in contact with each other. Therefore, the box body 30 includes a plurality of, for example, four first suction pads 64, a plurality of, for example, four first and second push rods 66, and a plurality of, for example, four, second suction pads at the box opening work position. 84 and a plurality of, for example, four third push rods 86 are firmly held from above and below the box 30.
FIG. 8 (C)
When the rotating member 59 rotates clockwise in the figure and rotates clockwise with the first suction pad 64 adsorbed to the first wall part 31 of the box 30, the first wall part 31 in the folded state is rotated. Moves away from the fourth wall 34 and opens (opens) the box 30 into a square cylinder. If the first suction pad 64 is moved away from the first wall portion 31 as it is, the box 30 will return to the folded state and the opening will be deformed into a substantially parallelogram. Therefore, the rotating member 59 further rotates clockwise to remove the folding bag of the box 30.

FIG. 9 (D)
The rotating member 59 further rotates clockwise, and the first suction pad 64 is moved until the first wall portion 31 of the box body 30 is in close contact with the third wall portion 33, which is the reverse of FIG. 8B. Fold to the state. When the first wall portion 31 is in close contact with the third wall portion 33, the first push rod 66A in front of the conveyance direction A presses the first corner portion 311 against the second wall portion 32 side and conveys it. The second push rod 66B at the rear of the direction A presses the second corner 312 in the bending direction. Therefore, in the box 30 of FIG. 8B, the first corner 311 is bent, the first wall 31 and the fourth wall 34 are in contact, and the second corner 312 is extended. The first wall portion 31 and the third wall portion 33 have a single planar shape. However, in the box 30 in FIG. 9D, the first corner portion 311 is connected to the first push rod 66A. The first wall portion 31 and the fourth wall portion 34 are pushed and extended to form a substantially single plane, and the second corner portion 312 is pushed and bent by the second push rod 66B to be the first. The wall portion 31 and the third wall portion 33 are in contact with each other at least partially.
FIG. 9 (E)
The rotating member 59 rotates counterclockwise and returns to the state of the box 30 opened (opened) in FIG.
FIG. 9 (F)
The first suction pad 64 stops suction and releases the suction state with the first wall portion 31, and the second suction pad 84 lowers the second elevating member 82 while maintaining suction to open the box. The box body 30 thus placed is placed on the belt 18, and the second elevating member 82 is further lowered to stop the suction of the second suction pad 84 to release the suction state with the second wall portion 32. Then, the box 30 opened by driving the belt 18 is conveyed in the conveyance direction A, and the next folded box 30 is conveyed from the supply unit 4 to the opening unit 5.

  In this way, in FIG. 9D, the first corner portion 311 and the second corner portion 312 are brazed by the first push rod 66A and the second push rod 66B, so that the box body 30 has a rectangular cylindrical shape. Even if the suction of each suction pad is stopped by returning to the above, it does not return to the opening of the parallelogram, and can be sequentially conveyed to the next operation portion while maintaining a substantially desired rectangular cylindrical shape.

It is a perspective view which shows the square box-shaped plastic box 30 opened. It is a top view of the plastic box body 30 of the folded state. It is a schematic front view of the box opening apparatus 1. It is a schematic front view of the box opening part 5 of the box opening apparatus 1. FIG. It is the schematic side view which looked at the box opening part 5 of the box opening apparatus 1 from the box loading part 3 side. It is a front view which shows typically the structure of the rotation mechanism 51 of the open box part 5. FIG. It is a schematic back view of the open box part 5. FIG. 4 is a schematic diagram showing a box opening process of the box 30. FIG. 4 is a schematic diagram showing a box opening process of the box 30. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Box opening apparatus 2 Machine base 5 Box opening part 18 Belt 30 Box body 31 1st wall part 32 2nd wall part 40 Linear moving mechanism 50 1st moving mechanism 60 1st suction pad fixing plate 64 1st Suction pad 81 Second moving mechanism 82 Second elevating member 84 Second suction pad A Conveying direction

Claims (4)

Opening the plastic box body in which at least the fourth wall portion is in close contact with the first wall portion and at least the third wall portion is in close contact with the second wall portion, and the first box portion is folded. In the box opening device that forms a box-shaped box with a rectangular cylindrical shape in which the wall portion and the second wall portion face each other and are spaced apart from each other,
A first suction pad that is sucked to the first wall portion of the folded box,
A second suction pad adsorbing to the second wall portion;
A moving mechanism for moving the first suction pad relative to the second suction pad;
A first push bar that contacts a first corner connecting the first wall and the fourth wall;
Have
The moving mechanism moves the first wall portion of the folded box body away from the fourth wall portion, and further until the first wall portion is in close contact with at least the third wall portion. Move the first suction pad ,
The first push bar presses the first corner portion against the second wall portion side when the first wall portion is in close contact with the third wall portion by the moving mechanism. . Oite to claim 1,
When the first wall portion comes into close contact with the third wall portion by the moving mechanism, the second corner portion connecting the first wall portion and the third wall portion is pressed in the bending direction. A box opening device further comprising a second push rod. In claim 1 or 2 ,
The moving mechanism includes a rotating mechanism that rotates and moves the first suction pad, and a linear moving mechanism that applies a driving force to the rotating mechanism,
The rotation mechanism is a rack-and-pinion mechanism having a pinion and a first rack and a second rack that are opposed to each other and mesh with the pinion.
The first rack and the second rack have a connected portion that can be connected to the linear movement mechanism by a fixing member. In claim 3 ,
The connected portion is a hole formed in the first rack and the second rack;
The box-opening device, wherein the fixing member is a pin that passes through the linear movement mechanism and is inserted into one of the holes.

Images