JPH07241939A - Folding case opening method and opening device - Google Patents

Abstract

PURPOSE:To open a case smoothly by restraining the occurrence of a vacuum between inter-fold carton materials at the time of opening. CONSTITUTION:Bellows 147b, 158b having two or more currugations are provided in at least one side of suckers 146, 157; at least one sucker 157 of the suckers 146, 157 is placed separably from a folding case; when the suction faces 147a, 158a of the bellows 147b, 158b of both the suckers 146, 157 touch the folding case, the sucker 157 stops moving, and vacuum negative pressure is applied to the suckers 146, 157. The pressure applies elastic contractive action to the bellows 147b, 158b of the suckers 147, 157 and slightly opens the folding case, and then moves the sucker 157 until the folding case opens in a square form completely.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for opening a folding case taken out from a magazine in which folded cases such as a box making machine and a case packing machine are accumulated in a box shape.

[0002]

2. Description of the Related Art Conventionally, a folding case K of this type is shown in FIG.
As shown in, the length surfaces KL1 and KL2 and the width surfaces KW1 and KW2 are provided with folding lines C1, C2, C3, and C4, and are provided in a foldable substantially rectangular shape (the joint margin is omitted). Length surface KL
Bent lines S1 and S2 on both edges of 1, KL2 and width surfaces KW1 and KW2
The flaps Kf1 and Kf2 are provided through the flaps, and are folded at, for example, bending lines C2 and C3 as shown in the drawing. In order to open the folding case K folded in this way, generally, for example, as shown in FIG. 16, the folding case K is made vertical in the drawing and the folding line C3 is used as the opening fulcrum to form the width surface K.
When a predetermined position of W2 is sucked and fixed to the suction point Q2 by the suction plate 3, and when it is sucked to the suction point Q1 of the predetermined position of the length surface KL1 by the suction plate 2 and opened in the direction of the arrow at once, the length surface KL1. There is a problem that a vacuum state cannot be formed between the width surface KW1 side, the length surface KL2 and the width surface KW2 side inner surface, so that the folding case K cannot be surely sucked and held on both sides. A method of suppressing the occurrence of a vacuum state by gradually moving the suction plates 2 or 3, or a method of suppressing the generation of a vacuum state by providing an operating mechanism for slightly moving the suction plates 2 and 3 once. Etc. have been tried.

[0003]

However, according to the conventional method for suppressing the vacuum state when opening the folding case K, the mechanism for gradually moving the suction cups 2 and 3 or the suction disc 2 is used. It is necessary to provide an actuating mechanism for slightly moving the first and the third parts, and in any case, there is a problem that the configuration becomes complicated.

The present invention has been made to solve the above-mentioned problems, and when the folding case is opened, it is possible to suppress the occurrence of a vacuum state between the carton paper materials of the folding cases and perform a smooth case opening. It is an object of the present invention to provide a folding case opening method and device that can be used.

[0005]

In order to solve the above technical problems, the present invention is provided with a suction plate for sucking and holding both side surfaces of a folding case, and a method of opening the folding case in a box shape by moving the suction plate. In at least one of the suction cups, at least one of the suction cups is provided so as to be movable toward and away from the folding case, and at least one of the suction cups has a bellows suction surface. At the point of contact with the folding case, the suction cup movement is temporarily stopped and a vacuum negative pressure is applied to the suction cup.By applying this vacuum negative pressure, the bellows part of both suction cups is subjected to elastic contraction. This is a method of opening the folding case in which the folding case is slightly opened, and then the suction cup is moved until the folding case completely opens in a box shape.A suction cup that holds both sides of the folding case by suction. In an opening device for opening the folding case in a box shape by a pair of suction means provided, at least one of the suction plates has two or more bellows portions, and at least one of the suction means is provided on a side surface of the folding case. An actuating means that moves the suction cup forward to a position where it comes into contact with the suction cup, a temporary stopping means for applying a vacuum negative pressure to the suction cup at the same suction point, and a suction cup that returns to the position where the folding case is completely opened It is an opening device for a folding case configured to be linked to a driving means including a moving returning means.

[0006]

With the above structure, when the suction cup holding the left and right sides of the folding case is temporarily stopped, vacuum suction operation is performed, so that the multiple bellows portions provided on the suction cup receive vacuum negative pressure and elastically contract. Then, a slight opening is provided between the folds to introduce air to suppress the occurrence of a vacuum state, and the fold case is opened well.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described with reference to the drawings. FIG. 1 shows a drive unit 32 of a case boxing machine 30 and a box opening unit 140 of a folding case K arranged on the upper side of the drive unit 32. The side view of the section 120 is shown. The case boxing machine 30 includes a drive section 32 disposed in a lower section 31 a of the machine frame 31.
And the open box 140 of the folding case K on the upper step 31b side.
Is provided, and a transport section 120 for transporting the opened case KA is continuously provided to the box opening section 140.
The supply portion 51 of the folding case K is disposed on the upper side of the.

A drive portion 32 of the lower stage portion 31a of the machine casing 31
As shown in FIGS. 2 to 4, there is a motor 3 with a brake.
A speed reducer 34 is connected to the motor 33 and the motor 33, and the suction frame 96 of the supply unit 51 is connected to one output shaft 35 of the speed reducer 34.
A supply actuating cam 36 for actuating is also attached, and an opening / conveying actuating cam 38 is attached to the other output shaft 37. Although not shown, a cam groove having a predetermined shape is provided on one surface of the supply operation cam 36, and a bell crank 40 is provided in the cam groove via a bearing member 39 mounted in the vicinity of the cam 36. Is pivotally attached to the Bell Crank 4
The one arm 40a of 0 is connected via a roller rolling in the cam groove, and the other arm 40b is connected to the suction operation arm 100 of the supply portion 51 of the folding case K via a supply connecting rod 41. .

A cam groove 160, which will be described later, for rocking the rocking arm 155 of the box opening portion 140 is formed on one surface 38a of the opening / transporting cam 38.
0 is a short piece arm 43a of an opening bell crank 43 pivotally attached to a bearing member 42 arranged in the vicinity of the cam 38.
Are connected via a roller that is rolled in the cam groove 160,
The movable member 153 of the opening part 140 is provided on the upper end of the long piece arm 43b.
One end of an opening connecting rod 44 that is connected to the above is pivotally attached. A shaft pin 38c is mounted on a predetermined radius line of the surface of the other surface 38b of the cam 38.
c is connected via a drive rod 48 to a lever member 47 attached to a support shaft 46 which is rotatably supported by bearings 45 on the left and right frames of the left and right frames of the lower step portion 31a. The rotation of the cam 38 gives a predetermined swing angle via the drive rod 48. Further, an operating lever 49 of a predetermined length is attached to the lever member 47 corresponding to the left and right ends of the support shaft 46, and the upper end side of the operating lever 49 is connected to the transporting member. Rod 50
It is connected to the moving base 121 of the transfer unit 120 via the.

Next, a description will be given of the supply unit 51 that sucks the folding cases K accumulated by the operation of the drive unit 32 and supplies them to the box opening unit 140. As shown in FIG. 5, the supply unit 51 is provided on the front side of the lower stage portion 31a so as to stand upright.
It is formed on the upper side of c and side plates 51a and 51b are erected on the left and right sides of the machine frame 31c.
1a and 51b are upper and lower connecting rods 52 and front and rear lower connecting shafts 5.
3a and 53b are connected and held, and the rear side lower connecting shaft 53b side is exposed above the box opening portion 140. A pair of left and right guide plates 54 for accommodating the folding case K is attached between the side plates 51a and 51b thus erected so that the distance between them can be adjusted. The guide plate 54 is integrally formed with a horizontal plate portion 55 and a guide holding portion 56 which is inclined upward from the front side of the horizontal plate portion 55 at a predetermined angle. As shown in FIG. 8, a guide bearing 57 is movably attached to a predetermined position corresponding to the lower connecting shafts 53a, 53b so as to be fitted onto the lower connecting shafts 53a, 53b. Also, the left and right side plates 51a, 53a, 53b close to the lower connecting shafts 53a, 53b,
An adjusting screw rod 59 is rotatably mounted inward on the 51b via a bearing 58, the adjusting screw rod 59 on the side plate 51a side is formed long, and left and right guides corresponding to the adjusting screw rod 59 are formed. A screw member 60 that is screwed with the screw rod 59 is attached to the horizontal plate portion 55 of the plate 54. Further, a chain wheel 61 is keyed to the adjustment screw rods 59 corresponding to the front and rear, respectively, and a chain 62 is engaged, and a handle is attached to either one of the front and rear adjustment screw rods 59 to attach the handle. By turning, the left and right guide plates 54 are adjustable along the lower connecting shafts 53a and 53b according to the width of the folding case K.

Further, guide plates 63 are attached to the guide holding portions 56 of the left and right guide plates 54, respectively, and folding cases K stacked through stays 63a can be taken out from the inclined ends of the guide plates 63. A roller member 64 is attached to the gate. Further, the guide holding portions 5 are provided inside the left and right guide plates 54.
A roller shaft 65 of a predetermined length is provided with a bearing 66 along the inclination of 6
It is rotatably supported via a and 66b, and a driven groove pulley 67 having a small diameter is attached to an inclined lower end of the roller shaft 65, and the driven groove pulley 67 is mounted on a roller shaft drive portion 70 provided on the machine frame 31c. It is connected.

This roller shaft drive unit 70 is shown in FIGS.
A drive shaft 72 is rotatably supported on the left and right sides of the machine frame 31c via bearings 71 as shown in FIG.
A driven chain wheel 73 is keyed to the end on the 1b side. A drive motor 74 is disposed below the drive shaft 72, and a driven chain wheel 73 is attached to a rotary shaft 74 a of the drive motor 74.
Corresponding to, the drive chain wheel 75 is keyed and both chain wheels 73, 7
A chain 76 is hung between the five. A driving groove pulley 77 is slidably provided on the left and right of the drive shaft 72 through a key. The driven groove pulley 67 and the driving groove pulley 77 on the side plate 51b side shown in FIG. 78 is engaged and the driven groove pulley 67 is engaged so as to rotate in the direction of the arrow inner side, and the driven groove pulley 67 on the opposite side is engaged.
A round belt 78 is symmetrically engaged with the main drive groove pulley 77, and the left and right roller shafts 65 connected to the driven groove pulley 67 are provided so as to rotate inward. An arm 79 is hung at a predetermined position on the left and right guide plates 54 with a predetermined space on the drive shaft 72.
Is provided at the lower end of the arm 79.
A bifurcated fork 80 that can be fitted into a groove provided in the outer periphery of the drive groove 7 is attached so that the left and right main drive groove pulleys 77 slide along the drive shaft 72 integrally with the left and right guide plates 54. It is provided.

Further, as shown in FIG. 5, the folding cases K are vertically dropped on the left and right guide plates 54 at predetermined positions on the side of the box opening part 140 corresponding to the predetermined positions facing the box opening part 140. A drop guide member 81 for holding the slip guide is attached. The dropping guide member 81 has a strip-shaped mounting piece 82 having a front edge 83 extending downward from the horizontal plate portion 55 with a predetermined length and having a predetermined overhanging width, and the lower side of the mounting piece 82. The front edge 83 from the lower edge of the horizontal plate 55
A rear edge 84 that is inclined at a predetermined angle to the side and hangs parallel to the front edge 83 from the end thereof, and is formed at the lower end near the case guide rail 116 of the upper step 31b of the machine frame 31. An outlet groove 85 and a guide groove 86 are formed on the upper side of the rear edge 84, and the rear edge 84 of the opening fulcrum P of the folding case K by the opening device 141 of the opening box 140 described later is formed by the case guide rail 116. It constitutes the receiving part. The front edge 83 is formed to have a projecting width shorter than that of the rear edge 84.

A screw rod 87 shown in the figure is rotatably attached to the inner surfaces of the left and right side plates 51a, 51b along the inclined edges 51c thereof via a support frame 88, and the upper ends of the screw rods 87 are Bevel gears 91 that mesh with bevel gears 90 that are attached to both ends of a shaft 89 that is rotatably supported between the side plates 51a and 51b are attached, and between the left and right screw rods 87, both end portions of a square shaft 92 are attached. Is screwed into the same-shaped shaft 92 so as to be movable up and down by rotating the shaft 89. The folding case K is provided on the rectangular shaft 92 at a predetermined interval.
The pressing member 93 is provided so that its slide position can be adjusted, and a roller member 64 of the same type as the roller member 64 attached to the stay 63a of the guide plate 63 is attached to the drop guide member 81 side of the pressing member 93 to fold the case. It is provided to block K.

Further, the support shaft 95 of the suction frame 96 is rotatably located at a predetermined position near the shaft 89 between the left and right side plates 51a and 51b and above the dropping guide member 81. The support shaft 95 is supported, and an angular shaft portion having a rectangular cross section is formed in a predetermined range of the support shaft 95, and a suction frame 96 is formed in a hanging shape at a central portion of the angular shaft portion. Left and right vertical frames 97 are vertically installed at a predetermined interval so that the suction frame 96 can be adjusted in position, and the vertical frames 97 are vertically connected between the vertical frames 97 so as to be adjustable in position along the vertical frames 97. A mounting member 98 to which a suction board 99 is mounted is mounted, and a suction frame 96 is mounted. Further, as shown in FIG. 7, a suction operation arm 100 having a predetermined length is attached to the end portion of the support shaft 95 on the side plate 51a side at a right angle to the vertical frame 97, and the end portion of the suction operation arm 100 is attached. An end of a supply connecting rod 41, which is connected to a bell crank 40, is pivotally connected to a supply operation cam 36 of the drive unit 32. The suction frame 96 provided in this manner is rotated by the rotation of the supply operation cam 36 to the front portion accumulated between the guide plates 54, and the tilted position at which the folding case K is suctioned and the dropping guide member 81 are dropped. Mouth groove 85
The folding case K is oscillated in a vertical position in which the folding case K is dropped and supplied.

Next, the box opening section 140 and the transport section 120 arranged on the upper stage portion 31b of the machine casing 31 will be described. As shown in FIGS. 9 and 10, the upper step portion 31b has a lower step portion 31a.
It is formed between the front machine frame 31c and the rear machine frame 31d which are erected up and down in front of and behind the machine frame 31c, 31d, and the rail member 10 is horizontally arranged along the corresponding beam members 101a, 101b.
2 is attached, a fixed support member 103 is horizontally mounted on the right side of the rail member 102 (upper side in FIG. 10), and a movable support member 104 is movably mounted on the left side along the rail member 102.
Is provided. Roller plates 105 are attached to both ends of the movable support member 104,
There are four rollers 10 rolling on the upper and lower surfaces of the rail member 102.
6 is installed. In addition, front and rear machine frames 31c, 31
The adjusting screw rods 107, 108 are rotatably supported via bearings 109 at predetermined positions substantially corresponding to the beam members 101a, 101b between the left and right frames of d, and the adjusting screw rods 10 are provided in front of and behind the movable support member 104.
A guide bearing 110, which is screwed with the threads of 7,108, is attached. Further, a chain wheel 111,112 is keyed to the shaft portion on the screw side of the adjusting screw rods 107,108, a chain 113 is hooked between the both chain wheels 111,112, and a handle 114 attached to the adjusting screw rod 107 is turned. The movable support member 104 is a fixed support member.
It is provided so that the interval with 103 can be adjusted.

Further, a pair of left and right case guide rails 116 are provided on the fixed support member 103 and the movable support member 104 via a substantially hook-shaped support bracket 115a, 115b at a predetermined height on the inner side at a predetermined interval. The front end of the case guide rail 116 extends forward from the position of the falling guide member 81 of the folding case K, and the rear end thereof extends to the end of the rear machine frame 31d. There is. In addition, the fixed support member 103 and the movable support member 104 are provided on opposite surfaces of the same member 103,
104 Plate-shaped rail members that project from the upper and lower surfaces of 104
Are attached over a predetermined range to form a transport section 120.

As shown in FIG. 10, the carrying section 120 is mainly composed of a movable base 121, which is composed of left and right roller carriages 122 and 123, which are movable support members 104 and case guides. The rail 116, the fixed support member 103, and the case guide rail 116 are reciprocally moved to the left and right in the figure, and are formed in a symmetrical shape. Therefore, the roller carriage 122 side will be described.
As shown in FIG. 9, the side plate 124 that constitutes 2 is formed in a substantially isosceles trapezoidal shape with a predetermined length, and convex portions 125a and 125b are formed on the front and rear of the upper long side thereof. The surface of the rail member 117 has a plurality of rollers 126 rolling on the upper and lower edges.
(A case of four pieces is illustrated) is pivotally attached, and a case KA which is opened is formed on the opposite convex portion 125a on the front side by the operating top 128 and the rising piece 129 in a substantially hook shape. The attachment 127 to be pushed is pivotally attached, and the attachment 127 is also pivotally attached to the rear convex portion 125b.The front and rear attachments 127 are connected to each other though not shown, and the front convex portion 125b is connected to each other. The piston rod 131 of the working cylinder 130 mounted at a predetermined position of the side plate 124 is linked to the operating pin 128 of the attachment 127 mounted on the 125a, and the piston rod 131 is extended and the front and rear attachments 127 of the attachment 127 are attached. The rising piece 129 is erected vertically from the upper surface of the case guide rail 116, and when the piston rod 131 is shortened, the operating top 128 is tilted downward so that the upper end of the rising piece 129 has the case guide rail. It is provided so as to be immersed below the upper surface of 116. In addition,
The working cylinders 130 provided on the left and right roller carriages 122, 123 are set to operate synchronously. The left and right roller carriages 122, 123 provided in this way are connected by a connecting shaft 132, and the connecting shaft 132 is connected to the roller carriages 122, 123.
The roller dolly 122 is provided so as to be movable integrally with the movable support member 104 and the case guide rail 116 by being inserted into the guide bearing 133 attached to the side plate 124 of the 123, and both ends of this connecting shaft 132 are shown in FIG. The upper end of an operating lever 49 attached to the left and right of the support shaft 46 of the drive unit 32 shown in FIG. Front attachment
Reference numeral 127 is provided so as to reciprocate between the pushing position of the case KA opened by the box opening portion 140 and the solid line position in the drawing.

Next, the box opening section 140 arranged at the front part of the carrying section 120 will be described with reference to FIGS. 9, 11 and 13. The box opening section 140 is mainly composed of an opening device 141. Then, the opening device 141 has a fixed position suction mechanism 142.
And the movable suction mechanism 150, and is arranged with the dropping guide member 81 of the supply section 51 as a reference.
The folding case K of the supply unit 51 is opened vertically to form the box 140.
The trailing edge 8 of the left and right guide members 81 that are dropped and guided to the side
4 is hung down in a predetermined manner in the front portion of the left and right case guide rails 116, and a fixed position suction mechanism 142 is provided on the front machine frame 31c side of the center portion of the left and right drop guide members 81. It is arranged. This fixed-position suction mechanism 142 includes a working cylinder 143, a support member 144 attached to and suspended from the piston rod, a bellows portion 147b horizontally attached to the support member 144 and connected to a vacuum source on the left and right sides, and a suction surface. A mounting bracket 145 for mounting a suction plate 146 formed in communication with 147a is provided, and the holding plate 14 is provided on the front side thereof in parallel with the trailing edge 84 of the drop guide member 81.
8 is provided, and a cup hole 149 is formed in the holding plate 148 so that the suction plate 146 can be retracted. It should be noted that this suction plate 146 may be provided in four vertically and horizontally, and the bellows part 147a of this suction plate 146 has a plurality of steps (in this example, the suction surface 147a and the bellows part 147b are in two steps). When the suction plate 146 is evacuated, the suction surface 147a and the bellows portion 147b are elastically contracted by a vacuum negative pressure to suck the folding case K. The fixed-position suction mechanism 142 provided in this way operates when the folding case K is dropped between the dropping guide members 81.
143 is extended so that the suction plate 146 is provided so as to suck a predetermined position of, for example, one width surface KW2 of the folding case K. In this suction state, the folding case K is attached to the holding plate 147. The bending line C3 of the width surface KW2 and the length surface KL1 is the center P of the opening.

Next, the movable suction mechanism 150 is mounted on the front side of the case guide rail 116 on the right side.
The cam rail 152, the movable member 153 moved along the cam rail 152, the swing arm 155 attached to the movable member 153, and the suction plate.
It consists of 157 and. This cam rail 152 is shown in FIG.
As shown in FIG. 1, a circle having a radius of the suction point Q1 by the suction plate 157 for sucking and opening the folding case K and the bending line C3 that is the opening center P, that is, a predetermined locus circle R of the suction plate 157. It is formed in an arcuate plate shape along the length of the range and is attached with the center P of the opening as a reference. The movable member 153 has a base portion 153a and a support portion 153b formed in a plate shape, and for example, four grooved rollers 154 rolling on the inner and outer edges of the cam rail 152 are pivotally mounted on the base portion 153a. Further, as shown in FIG. 10, a swing arm 155 having a substantially parallelogram shape in a plane is detachably attached horizontally to the support portion 153b and is provided in a projecting shape on the center side of the machine frame 31. The arm 155 is provided with a long groove hole 156 for attaching the suction plate 157 along the center of the opening case KA shown in FIG. 10, and the suction plate 157 connected to the vacuum source is attached to the long groove hole 156 in a positionally adjustable manner. At the same time, the suction plate 157 is attached at a position on the locus circle R as shown in FIG. At a predetermined position of the base portion 153a of the movable member 153 of the movable suction mechanism 150 thus provided, the long piece of the opening bell crank 43 connected to the opening of the driving portion 32 and the cam groove 160 of the conveying operation cam 38 is provided. An opening connecting rod 44, one end of which is connected to the arm 43b, is pivotally connected to the arm 43b, and the suction plate 157 is provided so as to reciprocally swing between a horizontal standby position a of the opening fulcrum P and a vertical suction position b. There is. Like the suction plate 146 of the fixed position suction mechanism 142, the suction plate 157 has a plurality of stages of bellows 158b and a suction face 158a (in this example, two stages are illustrated) that are connected to each other to form a vacuum. Then, the suction surface 158a and the bellows portion 158b are provided so as to elastically contract due to vacuum negative pressure and to suck the folding case K.

A cam groove 160 formed on one surface 38a of the opening / transporting operation cam 38 is formed in a substantially heart shape as shown in FIG.
The concave groove 161 is formed in the angle range of 0 degrees and 210 degrees, and the concave bottom portion 162 of the concave groove 161 in the angle range of 140 degrees and 150 degrees is formed linearly to form the suction temporary stop position. There is. Further, the angle range of 210 degrees and 90 degrees indicates the standby position a. In addition, the speed reducer 3 of the drive unit 32
The rotation of the output shaft 37 is taken out at the upper part of 4, and the supply bell crank 40, the opening bell crank 43 and the shaft pin 38
A position sensor 165 for detecting the operating position of c is provided.

Next, a series of operations for packing articles in the folding case K by the case boxing machine 30 configured as described above will be described. First, the guide plate 54 of the supply unit 51
The flaps Kf1 and Kf2 of the folding case K are set to the left and right on the roller shaft 65 between the inclined guide holding portions 56 of the length surface KL.
1. Place a large number of sheets with the width surface KW1 on the front side. In this case, since the left and right roller shafts 65 are rotated inward, the mounting posture of the folding case K is corrected so that the folding case K can be neatly erected and aligned from the front portion.
Are blocked by the roller members 64 on the left and right sides and on the upper side.

In this state, the supply connection rod 41 connected to the cam groove of the supply operation cam 36 is pulled down, and the suction frame 96 connected to this is fixed to the folding case K side around the support shaft 95. By rotating the angle of
The suction board 99 attached to the suction frame 96 is brought into contact with the folding case K to suck the case K by vacuum. Then, when the supply connecting rod 41 is moved upward, the suction frame 96 is rotated in the original direction, and at this time, the sucked folding case K is easily separated from the blocked roller member 64 and the same folding is performed. The left and right flaps Kf1 and Kf2 of the case K are positioned along the front edge 83 of the left and right drop guide members 81, and face the drop groove 85. In this state, the vacuum suction of the suction plate 99 is released, and the folding case K is guided by the left and right guide grooves 86 and dropped on the case guide rail 116 of the opening section 140 to be supplied. In this state, the end portions of the left and right flaps Kf1 and Kf2 of the folding case K are vertically held in the guide grooves 86 of the left and right drop guide members 81.

The folding case K vertically held in the box-opening section 140 is movable by being arranged on the side of the case guide rail 116 and the fixed-position suction mechanism 142 provided in the machine frame 31c of the box-opening section 140. It is opened by an opening device 141 including a suction mechanism 150. That is, the movable member 153 of the movable suction mechanism 142.
The suction plate 157 attached to the swing arm 155 of the opening / transporting operation cam 38 is rotated in the direction of the arrow shown in FIG.
Roller rolls in the groove portion 161a of the concave groove 161 in the angle range of 140 degrees from the 90 degree position of the cam groove 160, thereby making it possible to move the movable member.
153 is guided along the cam rail 152 arranged along the locus circle R via the opening connecting rod 44, and the suction plate 157 held at the standby position a by the movable member 153 via the swing arm 155 is It is rotated along the locus circle R. And
At the 140 degree position, the suction surface 158a of the suction plate 157 is brought into contact with the suction point Q1 of the length surface KL1 on the locus circle R of the folding case K. The working cylinder 143 of the fixed-position suction mechanism 142 extends to match the timing of the contact of the suction board 157 with the case K and the suction board 14 attached to the mounting bracket 145.
The suction surface 147a of 6 is brought into contact with a predetermined suction point Q2 of the width surface KW2 of the folding case K through the cup hole 149 of the holding plate 148, and the folding case K is attached by both suction discs 146 and 157 and is movable. On the mechanism 150 side, the swinging arm 155 is in a suspended state while the roller rolls on the concave bottom portion 162 formed in the 140 ° and 150 ° angle range of the concave groove 161 of the cam groove 160.

When the movable suction mechanism 150 holding the folding case K by the suction cups 146, 157 is temporarily stopped and the suction cups 146, 157 are evacuated, the suction surfaces 147a of the suction cups 146, 157 are held as shown in FIG. , 158a and bellows 14
7b and 158b are elastically contracted by vacuum negative pressure, and from the state of FIG. 13 (a), as shown in FIG. 13 (b), the length surface KL1, width surface KW1 side, width surface KW2, and length surface KL2 side of the folding case K are shown. And are respectively bent from the bending lines C1 and C4 to open in a small space s, and air is introduced into the space s. Then, the fixed position suction mechanism 142 maintains the state where the suction point Q2 of the width surface KW2 of the case K is suctioned, and the roller of the opening bell crank 43 on the side of the movable suction mechanism 150 has an angle of 150 degrees and 210 degrees of the concave groove 161. When the rolling of the groove portion 161b in the range is started, the movable member 153 is retracted toward the original standby position along the cam rail 152 via the opening connecting rod 44, and the swing arm 15 is moved.
5 is also rotated toward the standby position a, and the suction plate 157 is rotated along the locus circle R to the standby position a while maintaining the suction state. As a result, the length surface KL1 and the width surface KW1 sides of the folding case K are rotated about the opening center P (the bending line C3), and are bent along the bending line C1 during this rotation process, The fold line C2 side is pulled so that the length surface KL2 is bent from the fold line C4, and the roller moves in the cam groove 1602.
When reaching the 10 degree position, the suction cup 157 is held at the standby position a, and the folding case K is opened to the box-shaped case KA.

As shown in FIG. 14, in the case KA thus opened at the opening 140, for example, a stopper is inserted on the left opening side by a cylinder or other actuating means so as to close the left opening side, although not shown. At the same time, a supply portion for the article W is provided on the right opening side, and the article W is inserted into the case KA by a pusher means or the like. When the packing of the articles W is completed, the vacuum suction of the suction plates 146, 157 is released, and the working cylinder 143 of the fixed position suction mechanism 142 is shortened. The moving base 121 of the transport unit 120 is moved in synchronization with the insertion of the article W.

The movable mount 121 is moved forward and backward by swinging the operating lever 49 of the drive unit 32.
When moving to the 0 side, the left and right operating cylinders 130 are shortened and each attachment 127 is rotated downward, and the upper end of the rising piece 129 is moved and opened while being positioned below the upper surface of the case guide rail 116. When the actuation cylinder 130 is extended at the forward end toward the box part 140, the front attachment 127 scoops the case KA packed with the articles W in the opening part 140 to engage the rising piece 129. Then, the case KA is pushed backward by the rising piece 129 by the swing of the operating lever 49 and moved to the downstream side along the case guide rail 116. Although not shown in the drawing, the flaps Kf are provided on both sides of the case guide rail 116.
Folding means for 1, Kf2 are provided, and as shown in FIG. 14, the flaps Kf2 on the front and rear width surfaces KW1, KW2 are first folded, and then the flaps Kf1 on the upper and lower length surfaces KL1, KL2 are folded. Then, the flaps Kf1 and Kf2 folded by a sticking means such as hot melt or tape sticking are stuck to complete the box packaging. Note that the attachment 127 located on the rear side pushes the case KA that has been advanced in advance. Hereinafter, by supplying the folding case K, opening the folding case K, packing the article W into the opening case KA, transporting the case KA, folding the flaps Kf1 and Kf2 in the transporting process, and adhering them by the connecting operation of the above respective parts. After that, the products are sequentially packed in a box.

The case packing machine 30 of the present embodiment is constructed as described above, and in particular, in the box-opening section 140, the folding case K held vertically is opened in a box shape so that the folding case K and the movable suction mechanism 142 are movable. An opening device 141 composed of a mechanism 150 is provided, and suction plates 146 and 157 each having a plurality of stages of bellows parts 147b and 158b are provided in the suction mechanisms 142 and 150, respectively, and a suction surface 158a of the suction plate 157 is provided in the folding case K. The suction case Q1 of the length surface KL1 on the locus circle R is brought into contact with the suction disk 146, and the suction board 146 is brought into contact with a predetermined suction point Q2 of the width surface KW2 of the folding case K so that the folding case K is held by both suction disks 146 and 157. In addition, the concave groove 161 for operating the suction cup 157 is provided with the concave bottom portion 162 that is temporarily stopped during the sandwiching, and when the folding case K is held by the suction cups 146 and 157, the vacuum is drawn. Adsorption surface 147a, 1 of both suction cups 146,157
58a and the bellows parts 147b and 158b are elastically contracted by vacuum negative pressure, and the length surface KL1 and the width surface KW1 side, the width surface KW2 and the length surface KK2 side of the folding case K are bent from the folding lines C1 and C4, respectively. Since a slight space s is opened and air is flown into the space s, even if the suction plate 157 is subsequently rotated, a vacuum state is prevented due to the flow of air into the space s. Therefore, it is not necessary to provide a special actuating means for suppressing the occurrence of the conventional vacuum state, and as described above, the suction plates 146, 157 having the bellows portions 147b, 158b of a plurality of stages are adopted, and the movable suction mechanism 150 is provided. The suction plate in the operation cam groove 160
The simple state in which the case K of 157 is brought into contact with the case K to provide a temporary stop state to form the concave bottom portion 162 for vacuum suction can suppress the vacuum state and ensure the opening. Although the movable suction mechanism 150 is driven by the cam groove 160 in the above embodiment, the invention is not limited to this, and the movable suction mechanism 150 can be folded by the fixed position suction mechanism 142. An actuating means for moving the suction board 157 forward to a predetermined suction point Q1 on the side surface of the case K, a temporary stopping means for applying a vacuum negative pressure to the suction disks 146, 157 at the suction point Q1, and a folding mechanism. Any driving means including a returning means for returning the suction plate 157 to the position where the case K is completely opened may be used. In addition, both suction cups 146,
Although 157 is provided with bellows parts 147b and 158b respectively,
The configuration is not limited to this, and the configuration may be provided in either one. Further, although the suction plates 146, 157 are illustrated as circular shapes, they may be, for example, elliptical shapes, quadrangular shapes, etc., and the suction surfaces 147a, 158a are exemplified as frustum shapes, but are cylindrical shapes. Good.

[0029]

The present invention has the above-mentioned structure,
When vacuuming is performed with the folding case held by the left and right suction cups, the bellows of both suction cups are elastically contracted by vacuum negative pressure, and the folding carton material of the folding cases is opened in a small space. Since air flows into the same space, even if the suction plate is subsequently rotated, it is possible to prevent a vacuum state due to the air flowing into the space. . Therefore, there is no need to provide a special actuating means for suppressing the conventional vacuum state, and the adoption of a suction plate having a plurality of stages of bellows and the case of the suction plate at the forward end of the reciprocating means of the movable suction mechanism. With a simple configuration in which a temporary stop state is provided in the contact state with respect to and a temporary stop means for vacuum suction is provided, the vacuum state can be suppressed and the opening can be performed reliably.

[Brief description of drawings]

FIG. 1 is a side view of a drive unit of a case packing machine, an opening provided in an upper portion, and a transport unit.

FIG. 2 is a side view of a drive unit.

FIG. 3 is a plan view of a drive unit.

FIG. 4 is a right side view of FIG.

FIG. 5 is a cross-sectional view of a supply unit.

FIG. 6 is a diagram showing a drive unit of a roller shaft.

FIG. 7 is a view showing a support shaft of a suction frame and a supply connecting rod.

FIG. 8 is a plan view of an adjustment unit of a guide plate of the supply unit.

FIG. 9 is a side view of an opening unit and a transfer unit.

FIG. 10 is a plan view of a box opening section and a transfer section.

FIG. 11 is an operation explanatory view of the opening device.

FIG. 12 is a front view of an opening cam groove.

13 (a), (b), and (c) are explanatory views of the action of the suction plate.

FIG. 14 is an explanatory diagram from supply of a folding case to packaging.

FIG. 15 is a perspective view of a folding case.

FIG. 16 is an explanatory diagram of an opening of a conventional folding case.

[Explanation of symbols]

141 Opening device 142 Fixed position suction mechanism 146 Suction plate 147b Bellows part 150 Movable suction mechanism 152 Cam rail 155 Swing arm 157 Suction plate 158b Bellows part 38 Opening / transporting operation cam 38a Cam surface 160 Cam groove 161 Recessed groove 162 Recessed bottom part K Folding case P Opening center of folding case Q2 Adsorption point of suction cup R Locus circle whose radius is the size of opening center of folding case and adsorption point of suction cup

Claims (2)

[Claims] 1. A method of opening a foldable case in a box shape by moving a suction plate by holding a suction plate for holding both side surfaces of the fold case, wherein at least one of the suction plates has two or more bellows parts. In addition, at least one of the suction cups is movably arranged so that it can be brought into contact with and separated from the folding case, and the movement of the suction cups is temporarily stopped when the suction surface of the bellows part of both suction cups contacts the folding case. Then, vacuum negative pressure is applied to the suction plate. By applying this vacuum negative pressure, the bellows portions of both suction cups are elastically contracted to slightly open the folding case. After that, the method for opening the folding case is configured such that the suction cup is moved until the folding case is completely opened in a box shape. 2. An opening device for opening the folding case in a box shape by a pair of suction means provided with suction plates for sucking and holding both side surfaces of the folding case, wherein at least one of the suction plates has two or more bellows. And a means for moving at least one of the suction means forward to a position where the suction disk is in moving contact with the side surface of the folding case, and a temporary stop for applying a vacuum negative pressure to the suction disk at the suction point. An opening device for a folding case configured to be connected to a driving means including a moving means and a returning means for returning the suction disk to a position where the folding case is completely opened.