JPH0596664A - Opening device of folded up sheet into box in box making machine - Google Patents

Abstract

PURPOSE:To open reliably a folded up corrugated cardboard sheet into a box. CONSTITUTION:An air cylinder 48 is arranged on a movable rest and the first suction cups 49, 49 are arranged on the cylinder 48 through a bracket 50. A rotary actuator 52 is arranged on the movable rest on the side of the air cylinder 48 and turning bars 54, 54 are arranged on the actuator 52. A movable body 55 provided with the second suction cup 57 turnably is arranged slidably on the turning bars 54, 54 in its longitudinal direction. When a corrugated cardboard sheet is supplied to the front of the first suction cups 49, 49, the turning bars 54, 54 are turned and the side corresponding to the corrugated cardboard sheet is sucked and held by the first suction cups 49, 49 and second suction cup 57. Then in accordance with a movement of the second suction cup 57, the corrugated cardboard sheet is opened into a boxlike state by reversing the turning bars 54, 54.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrugated cardboard sheet in a folded state, which is taken out one by one from a corrugated cardboard sheet group accumulated in a supply section of a box making machine, so that it can be surely opened in a box shape. It relates to a box device.

[0002]

2. Description of the Related Art In a corrugated cardboard box making machine, a predetermined number of folded corrugated cardboard sheets are accumulated in a supply section (sheet magazine, etc.), and the corrugated cardboard sheets are taken out one by one from this sheet group. It is configured to be supplied to a box making device and opened in a box shape. As this box opening device, for example, the device disclosed in JP-A-55-64025 is known. In this device, a supporting arm equipped with a vacuum pad is horizontally movable in proximity to a carton supply unit where a predetermined number of folded corrugated cardboard sheets are accumulated, and the vacuum pad absorbs and holds the corrugated cardboard sheets. In this state, the support arm is horizontally moved to take out the sheet. Further, a deflection member is arranged in the vicinity of the movement path of the support arm, and the corrugated cardboard sheet is sucked and held by the suction pad while being moved while being brought into contact with the deflection member to move the corrugated cardboard sheet along the fold line. It is designed to open in a box.

[0003]

In the above-described conventional box opening device, the folded corrugated cardboard sheet can be opened with a simple structure in which the support arm is moved horizontally. However, when the corrugated cardboard sheet is opened by moving it while contacting the deflecting member, the end of the corrugated cardboard sheet may not properly contact the deflecting member depending on the suction position between the suction pad and the corrugated cardboard sheet. However, there has been a problem that the sheet cannot be reliably opened. Also, when the corrugated cardboard sheet contacts the deflecting member,
When a required load is applied to the sheet, the suction pad separates from the corrugated cardboard sheet, and there is a problem that the sheet cannot be taken out and opened. Further, it is pointed out that the corrugated cardboard sheet and the deflecting member are in sliding contact with each other, so that the surface of the sheet is scratched or the like.

[0004]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned various drawbacks inherent in the box opening device described above, and it is possible to reliably open a corrugated board sheet. At the same time, it is an object of the present invention to provide a box opening device having a simple structure that does not damage the surface of the sheet when opening the box.

[0005]

SUMMARY OF THE INVENTION In order to overcome the above-mentioned problems and achieve an intended object, the present invention opens a folded corrugated cardboard sheet, which is supplied one by one from a supply unit, into a box shape. In a box-making machine provided with a box-opening device, a first suction means capable of suction-holding one side of the corrugated cardboard sheet and a side of the first suction means, the drive means of the first suction means. A support member that is rotated between an operating position facing the front surface and a standby position that retracts laterally from the front surface of the first suction means, and the support member is slidable in the longitudinal direction on the support member. Is rotatably arranged in a direction parallel to the direction of rotation of the corrugated cardboard, and when the support member faces the operating position, the corrugated cardboard sheet is continuously connected to the suction surface of the first suction means by the first suction means via a fold line. The second adsorbing means capable of adsorbing and holding the side surface that faces the target, With one side of the supplied corrugated board sheet adsorbed and held by the first adsorbing means, the support member facing the standby position is rotated in the forward direction to adsorb and hold one side of the corrugated board sheet by the second adsorbing means. After that, the corrugated cardboard sheet is opened by rotating the support member in the reverse direction.

[0006]

The corrugated cardboard sheet supplied from the supply section has one side surface thereof adsorbed and held by the first adsorbing means. Further, by rotating the support member facing the standby position on the side of the first suction means in the forward rotation direction, the support member faces the operating position facing the first suction means with the corrugated cardboard sheet interposed therebetween. At this time, the second suction means arranged on the support member
The opposing surface of the corrugated cardboard sheet suction-held by the first suction means is suction-held. Then, by rotating the support member in the reverse direction, the side surface of the sheet suction-held by the second suction means is opened and expanded along the fold line with respect to the side surface of the sheet suction-held by the first suction means. The cardboard sheet is opened in a box shape. In addition, as the distance between the center of rotation of the support member and the sheet suction position of the second suction means is displaced along with the rotation of the support member, the second distance is changed.
The suction means moves correspondingly along the longitudinal direction of the support member, and the second suction means itself rotates with respect to the support member, thereby permitting displacement of the suction position.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the folding sheet opening apparatus for a box making machine according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic perspective view showing a box making machine that employs the box opening device according to the embodiment. Note that, for convenience of description, "left and right" refers to a direction intersecting the corrugated board sheet transport direction.

(Regarding Overall Structure of Box Making Machine) As shown in FIG. 1, a box making machine 10 is arranged on an upper portion of a machine frame 11 formed in a rectangular shape, and has a plurality of corrugated cardboard sheets folded in a plane. 1
An aligning and feeding device 16 provided with transfer means 13 and 14 for transferring 2 and a take-out device 15 for taking out the sheets one by one from the front end side (downstream side in the transfer direction) of the corrugated board sheet group, and arranged inside the machine frame 11. A box making apparatus 1 for assembling a corrugated cardboard sheet 12 supplied from the aligning and supplying apparatus 16 into a box shape
7, and a transfer conveyor 18 for transferring the packaging box assembled by the box making device 17 toward the downstream side and discharging it from the machine, and a bottom part of the conveyor while the packaging box is transferred by the conveyor 18. It basically comprises a box-sealing device 66 for boxing.

(Regarding Transferring Means of Aligning and Supplying Device) As shown in FIG. 5, a pair of chain conveyors extending along the longitudinal direction (transporting direction of the corrugated cardboard sheet 12) are provided above the machine casing 11. The transfer means 13 and 14 are arranged in parallel in the lateral direction at a predetermined distance. And driving the plurality of corrugated cardboard sheets 12, which are folded in a plane, on the chain conveyors 13 and 14 so as to intersect the conveyor traveling direction and tilt forward. Thus, the corrugated cardboard sheet group is transferred to supply the corrugated cardboard sheet 12 on the front end side to the sheet take-out position (described later). The chain conveyor 13,1
Since the configurations of 4 are the same, only the structure of one (upper side in FIG. 5) chain conveyor 14 will be described, and regarding the other chain conveyor 13, the same members are designated by the same reference numerals.

As shown in FIG. 2, a movable frame 20 constituting the chain conveyor 14 is installed between horizontal upper stays 19 and 19 arranged at both ends of the machine frame 11 in the longitudinal direction. Machine frame 11 by the mechanism described later
It is configured to be movable in the lateral direction. Sprockets 21, 22 are rotatably supported at both ends of the moving frame 20 in the longitudinal direction, and both sprockets 21, 2 are rotatably supported.
An endless chain 23 is wound between the two. The upper transport surface of the endless chain 23 projects from the upper surface of the moving frame 20, and is set so that the corrugated cardboard sheet 12 placed on the endless chain 23 can be transferred by traveling of the chain 23. The sprocket 22 on the downstream side in the sheet transfer direction
Is fixed to the machine frame 11 in parallel with the upper stay 19, and is pivotally supported by a fixed shaft 24 (described later) that is commonly inserted in the moving frames 20, 20.

As shown in FIG. 1, the sprocket 21 on the upstream side of the corrugated board sheet 12 in the transfer direction is configured to be rotationally driven by a drive motor 25 arranged on the moving frame 20. That is, the left and right chain conveyors 1
The motors 3 and 14 are driven and driven by independent drive motors 25 and 25, respectively. As a result, by synchronously traveling the chain conveyors 13 and 14, the corrugated cardboard sheet group placed on the endless chains 23 and 23 in a forwardly inclined state can be transferred in parallel without changing the posture. In addition, either the left or right chain conveyor 1
It is also possible to change the posture of the corrugated cardboard sheet 12 by moving only the end side of the corrugated cardboard sheet group placed on one of the endless chains 23 by running only 3 (14).

(Regarding Spacing Adjustment Mechanism of Moving Frame) Above each of the upper stays 19, as shown in FIG. 5, a reverse screw shaft 26 parallel to the stays 19 is rotatably supported by the machine frame 11. The reverse screw portion formed symmetrically on the reverse screw shaft 26 with the center in the axial direction sandwiches the corresponding moving frames 20, 2
It is screwed into nuts 27, 27 fixed to 0. Further, both reverse screw shafts 26, 26 are synchronously rotated in the forward and reverse directions on the machine frame 11 via a connecting means (neither is shown) composed of a sprocket-chain driven by a rotary handle or a motor. Adjustable means are provided. Therefore, by rotating the counterscrew shafts 26, 26 by the adjusting means, the pair of moving frames 20, 20 are kept parallel to each other under the counterscrew action of the counterscrew shafts 26, 26 and the machine frame 1
1 move toward and away from each other in the lateral direction. As a result, when the dimension of the corrugated board sheet 12 in the width direction (direction intersecting with the transfer direction) is changed, both moving frames 20,
By moving 20 the cardboard sheet 12 always
The endless chains 23, 23 can be exposed near the left and right ends of the chain.

On the outside of the moving frame 20 (on the side away from the other moving frame 20), the moving frame 2
A guide bar 28 extending parallel to 0 is disposed so as to face above the transport surface of the endless chain 23. The guide bar 28 guides the left and right ends of the corrugated cardboard sheet group transferred by the chain conveyors 13 and 14, and also functions to regulate the misalignment of the corrugated cardboard sheet group in the horizontal direction.
Further, as shown in FIG. 2, a guide 29 is vertically provided at the downstream end of the guide bar 28, and the guide 29 guides the corrugated board sheet 12 taken out by the take-out device 15 vertically to the box making device 17. Function to do so.

(Regarding the take-out device of the aligning and feeding device) FIG.
As shown in FIG. 2, a pair of link mechanisms 30 and 31 disposed opposite to each other in the left and right sides in the machine frame on the downstream side in the sheet transport direction, and a plurality of units to which a required operation is given by the link mechanisms 30 and 31 (implementation) A take-out device 15 including two suction cups 32 and 33 is provided. Link mechanism 3
Since the structures of 0 and 31 are bilaterally symmetric, only the structure of one (left side in FIG. 3) of the link mechanism 30 will be described.
Regarding the other link mechanism 31, the same members are designated by the same reference numerals.

A fixed shaft 24 parallel to the upper stay 19 is disposed on the machine frame 11, and the fixed shaft 24 is a sprocket 22, 2 on the downstream side of the movable frame 20, 20.
It also has the function of supporting 2. That is, the sprocket 22 is rotatably and axially movably arranged on the fixed shaft 24 facing each moving frame 20, and the sprocket 22 is moved as the moving frame 20 moves.
Is also configured to be able to follow.

At the end of the fixed shaft 24 facing the inside of the machine frame,
One arm portion 34a of the L-shaped lever 34 is rotatably supported, and the other arm portion 34b of the lever 34 is pivotally supported on one end of the swing plate 35 in the longitudinal direction. Fixed shaft 2
4, a projecting shaft 36 is projectingly provided on the inner surface of the machine frame, and one end of a connecting rod 37 is pivotally supported by the projecting shaft 36.
The other end of 7 is pivotally supported on the other end of the swing plate 35 in the longitudinal direction. Then, the swing plates 35, 35 of the link mechanisms 30, 31
A connecting bar 38 is installed between them, and at the tip of the arm portion 34b of the lever 34 of the left side link mechanism 30, the machine frame 1 is attached.
1 is connected to a piston rod 39a of an air cylinder 39 arranged upright. That is, by urging the air cylinder 39 forward and backward, the lever 34 is moved to the fixed shaft 2.
4 as a fulcrum, and a pair of rocking plates 3
The connecting bar 38 installed between 5 and 35 is moved forward and backward in the sheet transfer direction.

On the connecting bar 38, the corrugated cardboard sheet 1 is attached.
Suction cups 32 and 3 symmetrically to the left and right with the transfer center of 2 sandwiched
3, the suction cups 32 and 33 are directed toward the corrugated cardboard sheet group transferred by the chain conveyors 13 and 14. Then, the suction cups 32 and 33 are urged by the air cylinder 39 in the forward and reverse directions to cause the cardboard sheet 1
It is set so as to be positioned at the take-out position and the discharge position (see FIG. 8). The suction cups 32, 33 are arranged so that they can be moved and adjusted in the longitudinal direction of the connecting bar 38 so as to be able to cope with the size change of the corrugated board sheet 12. Further, since the discharge position is set to a level lower than the take-out position, as will be described later, the suction cup 3
The corrugated cardboard sheet 1 sucked and held by the suction cups 32, 32 when the second and the third 33 move from the take-out position to the discharge position.
The upper end of 2 can be detached from the regulation bar 44 (described later).

(Vacuum switch) The suction cup 3
2, 33 are connected to a vacuum suction source (not shown) via hoses 40, 40, and are controlled by the suction cups 32, 33 by ON / OFF controlling the suction source at an appropriate timing. The corrugated cardboard sheet 12 is set to be held by suction and released. Also hose 4
Vacuum switches 41, 42 are arranged correspondingly in the paths 0, 40, and the negative pressure generated in the suction cups 32, 33 at the time of taking out the corrugated cardboard sheet 12 is preset in the switches 41, 42. It is set so that it will be turned on when it reaches the specified value. Therefore, by setting the value of the negative pressure generated when the corrugated board sheet 12 comes into close contact with the suction cups 32 and 33 facing the sheet take-out position to the set value, the vacuum switches 41 and 42 are turned on, and the corrugated board is turned on. It is possible to confirm the suction and holding of the sheet 12.

When removing the corrugated board sheet 12,
If the vacuum switches 41 and 42 do not turn ON,
It is determined that the suction cups 32, 33 and the corrugated cardboard sheet 12 are not in close contact with each other, and the chain conveyors 13, 14 are
The transfer of the cardboard sheet 12 by the vacuum switch 4
It is set to continue until 1,42 is turned on. As a result, the corrugated cardboard sheet 12 can be reliably sucked and held by the suction cups 32 and 33.

The suction cup 32 and the vacuum switch 41 arranged on the left side of the corrugated board 12 transfer center control the drive of the left chain conveyor 13, and the suction cup arranged on the right side. 33 and the vacuum switch 42 allow the right chain conveyor 14
The drive control of is controlled individually. That is, for example, when the vacuum switches 41 and 42 corresponding to the suction cups 32 and 33 on both the left and right sides do not turn on, the chain conveyors 13 and 14 are driven to extract the corrugated cardboard sheet group from the sheet take-out position (suction cup 32). , 33)
Transfer to. Further, for example, when only the vacuum switch 41 of the left suction cup 32 is not turned ON, only the left chain conveyor 13 is driven and the left end of the corrugated cardboard sheet 12 placed on the conveyor 13 is moved to the suction cup 32. It is designed to be transferred.

(Regulation Bar) As shown in FIG. 1, extending portions 43, 43 extending upward are formed opposite to each other on both left and right sides of a portion of the machine frame 11 where the take-out device 15 is arranged. The guide groove 43 is inclined toward the extending portion 43 so as to be separated from the chain conveyors 13 and 14 as it goes upward.
a is formed. Then, between the two extension parts 43, 43,
A regulation bar 44 is installed along the guide grooves 43a, 43a so as to be adjustable up and down. The regulation bar 44 regulates the movement of the upper end of the corrugated cardboard sheet 12 sucked and held by the suction cups 32 and 33 when the suction cups 32 and 33 of the pickup device 15 are moved from the sheet pickup position to the discharge position. This ensures that the lower end of the corrugated board sheet 12 is reliably separated from the corrugated board sheet group. Further, by bringing the corrugated cardboard sheet 12 located on the front end side of the corrugated cardboard sheet group accumulated on the chain conveyors 13 and 14 into contact with the regulation bar 44, the chain conveyors 13 and 14 have their upper ends in the transfer direction. It is configured so that it can be placed in a state of being tilted forward (see FIG. 8).

(Regarding Box Making Device) Below the take-out device 15, as shown in FIG. 1, there is provided a box-opening device 70 for opening the folded corrugated cardboard sheet 12 that is dropped and supplied through the take-out device 15. The box making device 17 is provided with folding members 58, 59, 60 for folding the lower flap of the packaging box opened by the box opening device 70. In the box making device 17, the lower flap is folded while the packaging box opened in a box shape is transported in a predetermined direction. In this case, the packaging box transportation direction is the chain conveyor 13, It is set so as to be opposite to the direction in which the corrugated cardboard sheet 12 is transported by 14.

Here, the folded corrugated cardboard sheet 12 supplied from the aligning and supplying device 16 to the box making device 17 is
As shown in FIG. 10, the front surface 12a, the rear surface 12b, and the four side surfaces 12c and 12d are defined by four folds 12e. Also, the front 12
a and the upper and lower end portions of the rear surface 12b.
f and the lower flap 12g are connected to each other, and the upper flap 12 is provided at both upper and lower end portions of both side surfaces 12c and 12d.
The h and the lower flap 12i are connected to each other. The front surface 12a and the rear surface 12b are referred to with respect to the transfer direction of the packaging box by the box making device 17.

(Regarding the first suction cup in the box opening device) As shown in FIG.
Are arranged in parallel, and a transfer mechanism 46 composed of a sprocket-chain is arranged on each support frame 45.
Both transfer mechanisms 46, 46 are connected to the chain conveyors 13, 14
Is set to run parallel to the running direction of, and a movable base 47 movably installed between both support frames 45, 45
It is configured to move back and forth between the standby position and the sending position.

One support frame 45 of the movable table 47
A mounting plate 71 is erected at a position close to the mounting plate 71, and an air cylinder 48 is horizontally arranged on the rear surface side of the mounting plate 71, and its piston rod is projected to the front surface side of the mounting plate 71. The bracket 50 is arranged at the tip of the piston rod facing the front surface of the mounting plate 71.
In addition, a plurality of (two in the embodiment) first suction cups 49 connected to a vacuum suction source (not shown) are arranged in alignment in a direction intersecting the moving direction of the moving table 47. This first
The suction cup 49 is directed toward the front in the moving direction of the movable table 47, and in the state in which the movable table 47 faces the standby position, the suction cup 49 is behind the discharge position of the cardboard sheet 12 by the take-out device 15 (the moving direction of the movable table 47). It is positioned so that it is located on the rear side. On the rear surface side of the bracket 50, the guide rod 5 slidably inserted into the mounting plate 71.
0a is installed, and the rod 50a is connected to the air cylinder 48.
Transporting the packaging box opened by urging the conveyor 1
The bracket 50 functions to prevent the bracket 50 from rotating when the bracket 50 is pushed toward 8.

In the bracket 50, the rear surface 1 of the corrugated cardboard sheet 12 dropped and supplied from the sheet discharging position is located at a position slightly retracted from the front end surface of the first suction cup 49.
A support plate 67 is arranged facing the 2b in parallel. The support plate 67 is attached to the first suction cups 49, 4
9 and a second suction cup 57 (described later) when the corrugated cardboard sheet 12 is sucked, the position of the corrugated cardboard sheet 12 is regulated so that the suction cups 49, 49, 57 can securely suck the sheet. 1 suction cup 4
It functions to support the back surface 12b of the sheet adsorbed at 9,49 in a required area. Further, the air cylinder 48 is
Arranged so that positioning can be adjusted in the longitudinal direction of the moving table 47,
The first suction cups 49, 49 are configured to be able to face symmetrically with the widthwise center of the rear surface 12b of the corrugated board sheet 12 sandwiched therebetween.

(Regarding Support Bars) As shown in FIGS. 1 and 6, the support bars 51, 51 are provided on the machine frame 11 facing the lower side of the movable table 47 at predetermined intervals in the lateral direction of the machine frame 11.
Are horizontally arranged, and the support bars 51, 51 extend forward from the movable table 47 facing the standby position. The support bars 51, 51 are provided on the lower flap 12 of the corrugated cardboard sheet 12 that is dropped and supplied through the take-out device 15.
g and 12i are supported to function so that the corrugated cardboard sheet 12 faces the front surface of the first suction cups 49 and 49 in an upright state. A sheet detecting means (not shown) is arranged at an appropriate position on one of the support bars 51, and the lower ends of the corrugated cardboard sheets 12 come into contact with the support bars 51, 51, and the detecting means of the first suction cups 49, 49. The vacuum suction source is set to be turned on when it is detected that the corrugated board sheet 12 is supplied to the front side. The support bars 51, 51
Is configured to be adjustable up and down with respect to the machine frame 11, and by adjusting the height of the support bars 51, 51 according to the height dimension of the corrugated cardboard sheet 12, the first suction cups 49, 49
The suction position of the corrugated cardboard sheet 12 can be adjusted.

(Regarding the second suction cup in the box opening device) As shown in FIGS. 6 and 7, a rotary actuator 52 is arranged on the moving base 47 facing between the support frame 45 and the air cylinder 48. Holding body 5 driven to rotate horizontally by the rotary actuator 52
3, a pair of swivel bars 54, 54, which extend forward in the moving direction of the movable table 47 and are vertically spaced apart by a predetermined distance, are arranged in parallel. Then, the swivel bars 54, 54 are moved by the rotary actuator 52 by the forward and reverse urging force of the rotary table 52.
Standby position orthogonal to 7 (position indicated by alternate long and two short dashes line in FIG. 9 (a))
And an operating position which faces the front side of the movable table 47 substantially in parallel (see FIG.
The position is indicated by the solid line (a). The rotary actuator 52 is set so as to be urged in the forward rotation direction by the detection operation of the sheet detection means arranged on the support bar 51, and to turn the turning bars 54, 54 toward the operating position.

A movable body 55 is slidably arranged along the axial direction on the swivel bars 54, 54, and the movable body 55 is a compression spring wound around the swivel bars 54, 54 as shown in FIG. 56, 56 are always urged in a direction away from the actuator 52. In addition, the movable body 55, the pin 72
The holder 73 is horizontally rotatably disposed via the second suction cup 57 on the side of the holder 73 that faces the inside of the machine frame.
Is provided, and a vacuum suction source (not shown) is connected to the other side of the holder 73 so as to give a suction action to the second suction cup 57. When the swivel bars 54, 54 are moved to the operating position, the suction cup 5
Reference numeral 7 denotes a side surface 12c of the corrugated cardboard sheet 12 supplied to the front side of the first suction cups 49, 49 (a rear surface 12b sucked and held by the first suction cups 49, 49 and a fold line 12e).
It is positioned so as to come into contact with the side surface (which is continuously provided through). When the corrugated cardboard sheet 12 is sandwiched between the first suction cups 49, 49 and the second suction cup 57, the cups 49, 49, 57 are brought into close contact with the sheet 12, whereby the suction action by the vacuum suction source is reduced. The sheet 12 is suction-held.

A vacuum switch (neither is shown) is provided in each of the suction suction pipes connecting the vacuum suction sources of the first suction cups 49, 49 and the second suction cup 57, and each vacuum switch is The first suction cups 49, 49 and the second suction cup 57 form the rear surface 12b and the side surface 1 of the corrugated cardboard sheet 12.
It is set to detect the negative pressure generated when it comes into close contact with 2c and turn on. Then, the rotary actuator 52 is biased in the reverse direction at the timing when both the vacuum switches are turned ON, and the rotary bar 54,
It is configured to return 54 from the operating position to the standby position. Further, the holding member 53 is provided with a pressing member 68 that functions to press the corrugated cardboard sheet 12 against the first suction cup 49 when the swivel bar 54 faces the operating position, as shown in FIG. 9A. It is set up.

That is, in the box opening device 70, when the corrugated cardboard sheet 12 is supplied to the front side surface of the air cylinder 48 via the take-out device 15, the rotary actuator 52 is urged to move the swivel bars 54, 54 straight. The second suction cup 57 of the movable body 55 is swung in the rolling direction.
Can be brought into contact with the side plate 12c facing the front side in the moving direction of the moving table 47 in the corrugated board sheet 12. Then, the first suction cup 49 disposed on the air cylinder 48,
The rear surface 12b of the cardboard sheet 12 is suction-held by 49, and the side surface 12c of the cardboard sheet 12 is suction-held by the second suction cup 57 arranged on the movable body 55, and then the rotary actuator 52 is reversely biased. As the swivel bars 54, 54 swivel in the reverse direction, the corrugated cardboard sheet 12 has a fold 1 between the rear surface 12b and the side surface 12c.
It is opened from 2e and opened in a box shape (see FIG. 9B).
The turning means of the turning bar 54 is not limited to the rotary actuator, and a linear actuator such as an air cylinder can also be used by providing a mechanism capable of converting linear motion into rotary motion.

(Regarding Folding Member of Bottom Flap) On the bottom surface of the moving table 47, as shown in FIGS. 2 and 7, a rear folding member rotated by a rotary actuator 69 in a required range in the moving direction of the moving table 47. 58 is provided, and the rear folding member 58 is set so as to always face substantially the same position as the front end faces of the first suction cups 49, 49. The lower flap 12g, which operates when the corrugated cardboard sheet 12 is opened by the reciprocating revolving of the revolving bar 54 and hangs down at the rear of the packaging box, is configured to be folded inward. In addition, the machine frame 1 facing forward in the moving direction of the moving table 47.
1, a front folding member 59 is disposed and fixed, and the front folding member 59 functions to fold inward the lower flap 12g that hangs down to the front of the packaging box transferred by the moving table 47.

As shown in FIG. 6, a pair of side folding members 60, 60 facing both sides sandwiching the folding member 59 are rotatably pivotally supported on the machine frame 11 in which the front folding member 59 is disposed. Has been done. The side folding members 60, 60 are rotatably driven in the forward and reverse directions by the drive means 61 so that their open ends can be moved toward and away from each other. Then, when the both side folding members 60, 60 are moved close to each other, the lower flap 12i, which hangs down on both sides of the packaging box,
12i is folded inward. That is, the packaging box opened by the box opening device 70 is configured such that the four lower flaps 12g and 12i hanging at the bottom are folded while the moving table 47 moves from the standby position to the delivery position. .. In addition, the packaging box in which the lower flaps 12g, 12i are folded has a structure in which the air cylinders 48 of the first suction cups 49, 49 are urged in the extending direction of the piston rods, so that the suction cups 49, 49 and the support plate It is supplied to the transfer conveyor 18 via 67.

(Regarding Transfer Conveyor) Box Making Device 17
1 and 6 in front of the moving table 47 in the moving direction.
As shown in FIG. 5, a pair of belt conveyors 62, 62, which are set so that their conveying surfaces are vertical, are disposed opposite to each other with a predetermined space left and right. Then, the packaging box supplied from the box making device 17 is transferred while being sandwiched between the two belt conveyors 62, 62. Belt conveyor 6
2, 62 are configured to be movable toward and away from each other by an appropriate means, and are configured to adjust the spacing distance according to the outer dimensions of the packaging box.

Between the belt conveyors 62, 62,
A guide member 63 for preventing the folded bottom flap of the packaging box transferred by both conveyors 62, 62 from expanding.
Are arranged. In addition, as shown in FIG. 2, the tape 6 drawn from the supply source 64 is provided between the belt conveyors 62, 62.
5 is attached to the lower flaps 12i, 12i, and a sealing device 66 for fixing the flaps 12i, 12i to the main body of the packaging box is provided.

[0036]

Next, the operation of the box-making machine according to the embodiment thus constructed will be described.

When the box making machine 10 is in the standby state, the take-out device 15 in the aligning and supplying device 16 has its suction cup 3
2, 33 face the take-out position of the cardboard sheet 12. Further, in the box manufacturing device 17, the movable table 47 is positioned at the standby position, and the turning bars 54, 54 face the standby position orthogonal to the movable table 47. Then, the plurality of corrugated cardboard sheets 12 folded in a plane are placed in a state of being orthogonal to the pair of chain conveyors 13 and 14, and the corrugated cardboard sheet 12 at the front end thereof is brought into contact with the regulation bar 44. As a result, the chain conveyor 13,
A group of corrugated cardboard sheets is placed on 14 with its upper end portion tilted forward in the transfer direction.

(Regarding the corrugated cardboard sheet take-out step) When the box making machine 10 is operated in this state, the suction cup 3
The vacuum suction source connected to 2, 33 is turned on, and the suction action is given to the suction cups 32, 33. At this time, as shown in FIG. 8A, since the suction cups 32 and 33 are not in close contact with the corrugated cardboard sheet 12, the negative pressure generated in the suction cups 32 and 33 is a preset value (suction). The value of the negative pressure generated when the cups 32 and 33 and the corrugated board sheet 12 are in close contact with each other has not been reached, and the vacuum switches 41 and 42 are both in the OFF state. Further, the chain conveyors 13 and 14 are driven by the respective drive motors 25 and 2.
5, the corrugated cardboard sheet group placed on both conveyors 13 and 14 is moved toward the sheet take-out position.

As the corrugated cardboard sheet group is being transferred, FIG.
As shown in (b), when the corrugated cardboard sheet 12 at the front end abuts the suction cups 32, 33 facing the sheet take-out position, the negative pressure generated in the suction cups 32, 33 sucks and holds the corrugated board sheet 12. Then, when the negative pressure reaches the set value, the vacuum switches 41 and 42 are turned on, thereby urging the air cylinder 39,
As shown in (c), the suction cups 32 and 33 are retracted to the discharge position while the cardboard sheet 12 is suction-held by the operation of the pair of link mechanisms 30 and 31. At this time, since the movement of the corrugated cardboard sheet 12 in the vicinity of the upper end is regulated by the regulation bar 44, the portion of the corrugated cardboard sheet 12 sucked by the suction cups 32 and 33 is reliably separated from the succeeding corrugated cardboard sheet group. To be done. Further, since the discharge position is set so as to be at a level lower than the take-out position, the upper end of the separated corrugated cardboard sheet 12 is separated from the regulation bar 44. The vacuum switches 41, 42
Is turned on, the chain conveyors 13 and 14 are turned on.
Is stopped, and the transportation of the corrugated cardboard sheet group is stopped.

When an appropriate detecting means detects the arrival of the suction cups 32, 33 at the discharge position, the vacuum suction source is turned off, and the suction of the corrugated cardboard sheet 12 by the suction cups 32, 33 is released. As a result, the corrugated cardboard sheet 12 is vertically dropped and supplied by its own weight to the front surface side of the movable table 47 in the standby state.

The chain conveyors 13 and 14 are
While the vacuum switches 41 and 42 arranged on the suction cups 32 and 32 facing the sheet take-out position are turned on, they are driven to travel. Therefore, for example, even when the corrugated cardboard sheet 12 is placed on the chain conveyors 13 and 14 in a state in which the corrugated cardboard sheet 12 is inclined with respect to the direction intersecting the transfer direction, the corrugated cardboard sheet 12 is placed in both suction cups 3.
It is possible to make sure contact with 2, 33.

That is, for example, the left end (the side corresponding to the chain conveyor 13) of the corrugated board sheet 12 is on the right side.
When it is inclined so as to be positioned rearward in the transfer direction with respect to the end portion (on the side corresponding to the chain conveyor 14), the corrugated cardboard sheet 12 first contacts the suction cup 33 on the right side and is connected to the suction cup 33. Corresponding vacuum switch 42 is ON
The chain conveyor 14 on the right side is activated and the traveling of the chain conveyor 14 on the right side is stopped.
However, at this time, since the corrugated cardboard sheet 12 is not yet in contact with the left suction cup 32, the suction cup 3
The corresponding vacuum switch 41 connected to 2 does not operate ON. Therefore, only the left chain conveyor 13 is continuously driven to move, and the left end portion of the corrugated cardboard sheet 12 placed on the conveyor 13 is transferred toward the suction cup 32. As a result, the corrugated cardboard sheet 12 is surely brought into contact with the left suction cup 32 to be suction-held. Then, the air cylinder 3 of the take-out device 15 is provided on condition that both the vacuum switches 41 and 42 are turned on.
9, the corrugated cardboard sheet 12 sucked and held in the suction cups 32 and 33 is separated from the succeeding corrugated cardboard sheet group and taken out.

(Regarding Box Making Process) The corrugated cardboard sheet 12 dropped and supplied by the take-out device 15 is placed on the support bars 51, 51, and the first suction cup 49 disposed on the moving table 47. , 49, and are supported by the suction cups 49, 49 and the support plate 67 in a substantially upright state. When this state is detected by an appropriate detecting means, the moving table 47 is started to move forward by the transfer mechanisms 46, 46, the vacuum suction source connected to the first suction cups 49, 49 is turned on, and the suction cups are turned on. A suction effect is given to 49,49. At this time, since the first suction cups 49, 49 are not in close contact with the corrugated cardboard sheet 12, the sheet 12 is not suction-held.

Further, as shown in FIG. 9 (a), the rotary actuator 52 is biased in the forward direction, and the swivel bars 54, 54 are swung toward the corrugated cardboard sheet 12, so that the bars 54, 54 are rotated. The disposed second suction cup 57 contacts the side surface 12c of the corrugated cardboard sheet 12. At this time, the corrugated cardboard sheet 12 is pressed against the first suction cups 49, 49 by the pressing member 68 and the second suction cup 57 arranged on the holding body 53, so that the rear surface 12b of the sheet 12 becomes the first suction cup. 49 and 49 are adsorbed and held. The second suction cup 57 is also the cup 57.
The side surface 12c of the corrugated cardboard sheet 12 is suction-held by the suction action of the vacuum suction source connected to. Then, when the corresponding vacuum switch detects the suction holding of the sheet 12 by the first suction cups 49, 49 and the second suction cup 57, the rotary actuator 52 is reversely mounted on condition that all the vacuum switches are turned on. The turning bars 54, 54 are urged to return to the standby position.

At this time, the rear surface 12 of the corrugated board sheet 12
Since b is sucked and held by the first suction cups 49, 49, as shown in FIG.
The side surface 12c of the corrugated cardboard sheet 12 according to the turning of 4
The crease 12e is used as a fulcrum to open and expand in a direction away from the rear surface 12b, whereby the cardboard sheet 12 is opened in a box shape. That is, in the box opening device 70 according to the embodiment, since the corrugated board sheet 12 is opened in a state of being sucked and held by the first suction cups 49, 49 and the second suction cup 57, it is possible to achieve reliable box opening. There is no risk of damage to the sheet surface.

Here, a fold line 12e serving as an opening fulcrum of the corrugated board sheet 12 opened by turning the turning bar 54.
(Fold line 12e that defines the rear surface 12b and the side surface 12c)
And the turning center of the turning bar 54 is displaced in position.
Therefore, the separation distance from the suction position of the cardboard sheet 12 (side surface 12c) sucked by the second suction cup 57 of the swivel bar 54 facing the operating position to the swivel center, and the suction position when the cardboard sheet 12 is opened. The distance from the center of rotation to the turning center is different. Therefore, in the embodiment, the movable body 55 is slidably arranged with respect to the swivel bar 54, and the second suction cup 57 is swivelably arranged with respect to the movable body 55. As a result, when the suction position is displaced, as shown in FIG. 9B, the movable body 55 and the second suction cup 57 are correspondingly moved with the displacement of the suction position, and the movable body 55 and the second suction cup 57 are moved relative to the corrugated cardboard sheet 12. The second suction cup 57 can be prevented from being “twisted”. Therefore, the second suction cup 57 does not come off from the corrugated board sheet 12 during the revolving of the revolving bar 54, and the corrugated board sheet 12 can be reliably opened.

Next, when it is confirmed that the corrugated board sheet 12 has been opened, the rear folding member 58 is actuated to fold the lower flap 12g facing the rear portion of the packaging box inward, and
Lower flap 1 facing the front by moving the moving table 47 forward
The flap 12g is folded by bringing 2g into contact with the front folding member 59 arranged on the machine frame 11. Then, after confirming that the rear folding member 58 has returned to the standby position, the lower flaps 12i, 12i facing the both sides of the packaging box by the side folding members 60, 60.
Will be folded.

The movable table 47 is further moved, and the movable table 4 is moved.
When an appropriate detecting means detects that 7 has reached the delivery position, the suction of the packaging box by the suction cups 49, 49, 57 is released, and the air cylinder 48 is attached in the direction of extending the piston rod. First suction cup 4
The packaging box is extruded toward the transfer conveyor 18 through 9,49 and the support plate 67. This packaging box is supplied between a pair of belt conveyors 62, 62, and thereafter transported while being sandwiched by the conveyors 62, 62. During transfer by the belt conveyors 62, 62, the tape 65 is attached to the bottom surface of the packaging box via the sealing device 66 to seal the bottom portion.

The movable table 47 that has pushed the packaging box toward the transfer conveyor 18 is returned to the standby position by the reverse drive of the transfer mechanisms 46, 46. Then, the moving table 47
When the return of the device to the standby position is confirmed, the take-out device 15
Then, the next corrugated board sheet 12 is taken out.

[0050]

As described above, according to the folding sheet opening device of the box making machine of the present invention, the corrugated cardboard sheet is sucked and held by the first suction means and the second suction means before Since the corrugated cardboard sheet is configured to be opened by moving the suction means, it is possible to surely open the sheet without causing damage such as scratches on the sheet surface. If the center of rotation of the support member on which the second suction means is arranged does not coincide with the fold line that serves as a fulcrum at the time of opening the corrugated board, the suction by the second suction means will occur as the sheet is opened. Although the position is displaced, in the present application, since the second suction means is arranged so as to be slidable and rotatable in the longitudinal direction with respect to the support member, the second suction means is changed according to the displacement of the suction position. Moves. That is, since it is not necessary to align the fold line of the corrugated cardboard sheet, which serves as a fulcrum when the box is opened, with the rotation center of the support member, the position where the support member is disposed is not limited, and the device itself can be downsized. There are possible advantages.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a box making machine adopting a box opening device according to an embodiment.

FIG. 2 is a vertical side view of the box making machine.

FIG. 3 is a schematic perspective view of a main part of a take-out device of the alignment supply device.

FIG. 4 is a side view showing the box making machine partially broken away.

FIG. 5 is a plan view of a box making machine.

FIG. 6 is a cross-sectional plan view of the box making machine.

FIG. 7 is a schematic perspective view of an essential part showing a box opening device in the box manufacturing apparatus.

FIG. 8 is an explanatory diagram showing a corrugated board sheet take-out step by a take-out device.

FIG. 9 is an explanatory view showing a box opening process of the corrugated board sheet by the box opening device.

FIG. 10 is a schematic perspective view of a corrugated cardboard sheet that is folded.

[Explanation of symbols]

 12 Corrugated cardboard sheet 12b Rear surface 12c Side surface 49 First suction cup 52 Rotary actuator 54 Rotating bar 57 Second suction cup 70 Opening device

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[Procedure amendment]

[Submission date] November 25, 1991

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 10

[Correction method] Change

[Correction content]

[Figure 10]

Claims (1)

[Claims] 1. A box making machine equipped with a box opening device for opening folded corrugated cardboard sheets, which are supplied one by one from a supply section, into a box shape, capable of adsorbing and holding one side of the corrugated cardboard sheet. A first adsorbing means, an operating position which is arranged laterally of the first adsorbing means and faces the front surface of the first adsorbing means by a driving means, and a standby position which retracts laterally from the front surface of the first adsorbing means. A supporting member which is rotated between the supporting member and a supporting member which is slidable in the longitudinal direction and rotatable in a direction parallel to the rotating direction of the supporting member. When faced, it comprises a second suction means which is connected to the suction surface of the first suction means of the corrugated cardboard through a fold and is capable of suction-holding side surfaces facing each other, and is supplied from the supply section. First side of corrugated cardboard sheet
In a state of being sucked and held by the sucking means, the supporting member facing the standby position is rotated in the forward direction to suck and hold one side of the corrugated board sheet by the second sucking means, and then the supporting member is rotated in the reverse direction. An apparatus for opening a folding sheet in a box making machine, which is configured to open a corrugated cardboard sheet by moving.