JPH05132016A - Device for bending flap of packing case - Google Patents

Abstract

PURPOSE:To obtain an infallible bending of a flap by a method wherein in the course of transfer of a packing case, the flap connected to a mouth part of a cylindrical case body is bent from outside, and the flap and the case body are sandwiched pressingly on the both sides of a bending line of the flap. CONSTITUTION:When a packing case 1 is transferred to an outside flap bending device, an insertion part 10a of an outside flap 10 is inserted between upper and lower sandwiching rollers 239 and 252, whereby the insertion part 10a is bent. Next, when the outside flap 10 comes out of contact with the upper and lower sandwiching rollers 239 and 252 and into contact with guide bars 266 and 267, the outside flap 10 is bent downward, so that the insertion part 10a is guided by guide plates 264 and 265 to be inserted into a mouth part 3 of a case body 2 from outside of inside flaps 8a and 8b. After that, pressing plates 296 and 297 are pressed against an upper wall 2a of the case body 2 in the vicinity of a bending line 11 of the outside flap 10. At the same time, pressing rollers 281 are pressed against the outside flap 10, whereby the outside flap 10 is bent without fail.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for folding and closing both flaps with respect to the mouth of a packaging case which is provided with flaps with insertion portions at both mouths of a case body. Is.

[0002]

2. Description of the Related Art Conventionally, a packaging machine equipped with this type of device is
Various types are provided for packaging cases such as cartons.
In this packaging machine, the flap projecting from the mouth portion is pressed from the outside of the mouth portion by a bending member and folded along the folding line to the vicinity of the mouth portion.

[0003]

However, when the folding member is separated from the flap, there is a problem that the flap opens due to its elasticity.

Particularly, when the packaging case is made of plastic, the drawback is remarkable. Therefore, at present, when automatically packaging an article in a plastic packaging case with a flap, the conventional carton packaging machine is used only for the packaging case that has a special ruled line that is easy to fold, but for other things. Since it is usually done manually, the bending work was very troublesome.

Therefore, the present applicant has filed Japanese Patent Application No. 2-25598.
Although a flap folding device for a packaging case is provided as No. 9, the present invention is to further improve the flap folding means of the device to more surely perform the flap folding with respect to the mouth portion of the case body. Has a purpose. Another object of the present invention is to allow the flap folding means to be adjusted according to the size change of the packaging case.

[0006]

A flap folding device K ₂ for a packaging case according to the present invention is described below with reference to the drawings of an embodiment.
In particular, FIGS. 1, 14, 21 and 2-5, 6 and 15-20
As shown in FIG. 3, a packaging case transporting device B for transporting the packaging case 1 provided with the flaps 10 that can be folded along the folding lines 11 in the directions orthogonal to the transporting direction P at both mouths 3 of the cylindrical case body 2. And insertion portion bending means 235 and 248 for bending the insertion portion 10a at the tip of the flap 10 protruding from both the mouth portions 3 along the folding line 11a, and the flap 10 from the outside of the mouth portion 3 to the vicinity of the mouth portion 3. Flap folding means 262, 263 for folding the flap 10 and the case body 2 on both sides of the fold line 11 of the flap 10 folded up to the vicinity of both mouths 3.
8, 269 and.

In the flap correcting means 268, 269, the pressing members 281, 28 for pressing the flap 10 into pressure contact with each other.
2 and the pressing members 296 and 297 for pressing the case body 2 into pressure contact with each other.
Are provided to apply elastic force to the flap pressing members 281 and 282.

In the insertion portion bending means 235, 248, the holding member 23 having the recesses 239a, 252a is provided.
9, 252 and holding members 240, 253 having convex portions 240a, 253a are provided, and the concave portions 239a, 252 are provided.
The insertion portion 10a of the flap 10 can be inserted between a and the convex portions 240a and 253a.

In the flap folding means 262 and 263, the flap guide members 266 and 267 which are in contact with the flap 10 and are inclined with respect to the conveying direction P so as to bend the flap 10 toward the mouth 3 side, and the flap 10 are provided. Insert 10
Insertion portion guide members 264 and 265 for contacting a and guiding it to the mouth portion 3 side are provided.

In the support frame 207 which is supported on the machine frame 12 so as to be vertically movable, one of the two mouth portions 3 is one of the mouth portions 3.
The insertion portion bending means 248, the flap bending means 263, and the flap correcting means 269 corresponding to the support frame 207.
The insertion portion bending means 235, the flap bending means 262, and the flap correction means 268 corresponding to the other mouth portion 3 are fixed on the movable frame 233, and each of the movable frame 233 is installed. The means 235, 262 and 268 can be moved toward and away from the fixed means 248, 263 and 269 as the movable frame 233 moves.

In both of the insertion portion bending means 248, 235, the holding members 239, 252 having the concave portions 239a, 252a and the holding members 240, 253 having the convex portions 240a, 253a are movable bodies. 250,23
7 and attaches both movable bodies 250 and 237 to the support frame 20.
On the fixed side of the movable body 2
The interlocking rope 256 connected to 50 is connected to the machine frame 12 side via the support frame 207, the interlocking rope 243 connected to the movable body 237 on the movable frame 233 side is connected to the movable frame 233 side, and the movable frame 233 is further connected. It is connected to a movable base plate 34 supported on the machine frame 12 side so as to move following.

[0012]

First, the case body 2 of the packaging case 1 shown in FIG.
This flap folding device K ₂ according to the length L and height H of
Adjust.

That is, when the movable frame 233 is moved,
The insertion portion bending means 235, the flap bending means 262, and the flap correction means 268 on the above are moved toward and away from the insertion side bending means 248, the flap bending means 263, and the flap correction means 269 on the fixed side. They are set according to the length L of the case body 2.

When the support frame 207 is moved up and down, the means 235, 248, 262, 263, 268, 26 are moved.
9 is set according to the height H of the case body 2. At this time, as shown in FIG. 18, the vertical movement distance H1 of the support frame 207 is held by the interlocking ropes 243, 256 by the holding members 239, 240, 252 on the movable bodies 237, 250 of the both insertion portion bending means 235, 248. , 253 of the distance adjustment distance. Therefore, in the insertion portion bending means 235 that moves together with the movable frame 233 and the movable base plate 34, the support frame 20
7, vertical movement distance H1, movable frame 233, and movable base plate 34
Change by the sum of the moving distance L1 of the support frame 207 and the vertical moving distance H1 of the support frame 207 in the inserting portion bending means 248 on the fixed side.

Now, the packaging case 1 is conveyed to the flap folding device K ₂ in the state shown in FIG. Then, as shown in FIG. 18, when the insertion portion 10a of the flap 10 is inserted between the holding members 239, 252 and the holding members 240, 253, the insertion portion 10a is bent at the folding line 11a.

Thereafter, as shown in FIG. 19, the flap 1
When 0 is separated from the holding members 239, 240, 252, 253 and comes into contact with the guide members 266, 267, the flap 1
0 is bent at a fold line 11, and the insertion portion 10a of the flap 10 is guided by the guide members 264 and 265 and inserted into the mouth portion 3 of the case body 2 from the outside.

Next, as shown in FIG. 20, the flap 10
The pressing members 296 and 297 are pressed against the case main body 2 in the vicinity of the folding line 11 of FIG.
When 282 is pressed against the flap 10, the flap 10 and the case body 2 are sandwiched by the pressing members 296, 297 and the pressing members 281, 284, and the flap 10 is surely bent by the force acting on the folding line 11. Be done.

Then, the packaging case 1 is pressed by the pressing members 296.
Even if the flap 10 is separated from the pressing members 281 and 282, the flap 10 is bent by elasticity as shown in FIG. 21 without bulging outward, and closes the mouth portion 3 of the case body 2.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a packaging case 1 used in the packaging machine of the present embodiment is made of plastic, and a case body 2 having an opening 3 on both left and right sides in an opened state is a top wall 2a, a front wall 2b, and a bottom wall 2b. The wall 2c and the rear wall 2d form a rectangular parallelepiped shape, and fold lines 4, 5, are provided between the walls 2a, 2b, 2c, 2d.
6 and 7 are formed between the left and right mouth portions 3. Inner flaps 8 are formed on both front and rear walls 2b and 2d at both mouths 3.
a and 8b are integrally formed via a fold line 9, and the inner flaps 8a and 8b extend so as to be flush with the front and rear walls 2b and 2d. Further, the outer flaps 10 are integrally formed on the upper wall 2a of the both mouth portions 3 via folding lines 11, and the respective outer flaps 10 extend so as to be flush with the upper wall 2a. An insertion portion 10a is formed on each outer flap 10 along a fold line 11a.

Before packaging, such a packaging case 1 is flatly folded along the folding lines 5 and 7 of a part of the case body 2 and stored in the packaging case opening device A shown by an imaginary line in FIG. Is becoming The packaging case 1 is opened in the state shown in FIG.
It is designed to be placed on top.

First, the packaging case conveying device B will be described in detail. As shown in FIG. 2, a pair of driven side sprockets 14 and 15 and driven side sprockets 16 and 17 are attached to both sides of the support shaft 13 attached to the rear end of the machine frame 12 along the axial direction thereof. There is. Both left side sprockets 14 and 15 are rotatably supported on the support shaft 13 and movable in the axial direction of the support shaft 13. The right sprockets 16 and 17 are rotatably supported by the support shaft 13 so as not to move in the axial direction of the support shaft 13. On the other hand, a pair of drive side sprockets 19 and 20 and drive side sprockets 21 and 22 are attached to the left and right sides of the rotary drive shaft 18 supported by the front end of the machine frame 12 along the axial direction thereof. Both left side sprockets 19 and 20 are supported so as to be rotatable integrally with the rotary drive shaft 18 and movable in the axial direction of the rotary drive shaft 18. Further, both the right sprockets 21 and 22 are supported so as to be integrally rotatable with respect to the rotary drive shaft 18, and are prevented from moving in the axial direction of the rotary drive shaft 18.
Then, the driven side sprockets 14, 15, 16, 1
7 and each sprocket 19, 20, 21, 22 between the drive side and each carrier chain 23, 2 as an endless rotary rope.
4, 25 and 26 are wound in parallel on each of the left and right sides.

As shown in FIGS. 2 and 7, a plurality of transfer sections 28, 30 are attached to the inner transfer chains 24, 26 of the transfer chains 23, 24, 25, 26 at equal intervals. Both outer transport chains 2
3 and 25 have the same number of gripping sections 2 as the transport sections 28 and 30.
7 and 29 are attached to the transport units 28 and 30 at positions apart from each other in the front direction at equal intervals, and the transport units 28 and 30 and the sandwiching units 27 and 29 form a set of packaging case positioning units 31. ing.

As shown by an imaginary line in FIG. 2, in the article supply area S at the rear of the packaging case carrier B, a first article carrier C1 is arranged in parallel along the right side thereof, and A second article carrying device C2 is provided adjacent to the right side of the first article carrying device C1. Moreover, FIG.
As indicated by the imaginary line, the first and second article conveying devices C1 and C1 corresponding to the article supply region S of the packaging case conveying device B1.
An article pushing device D is provided above C2. Further, as shown by the imaginary line in FIG.
Of the left and right sides of the article supply area S, the article receiving apparatuses E are arranged in parallel on the side opposite to the first article conveying apparatus C1.

On the other hand, as shown by an imaginary line in FIG.
A flap folding device K shown in FIG. 6 is provided at the front portion of 2. The device K will be described later. Next, FIGS.
The packaging case length adjusting mechanism F of the packaging case transporting device B shown in FIG.

As shown in FIGS. 2 and 7 and 8, in the flap folding device K, a pair of front and rear male screw rods 33 and 32 are used.
Is rotatably supported with respect to the machine frame 12, and on the left side between the male screw rods 32, 33, the movable base plate 34 has the male screw rods 32, 33.
It is screwed to 33. Adjacent to the support shaft 13 and the rotary drive shaft 18 of the packaging case carrier B, the male screw rods 35, 3 are provided.
6 is rotatably supported with respect to the machine frame 12, and both male screw rods 3
Brackets 37 and 38 are screwed onto the screws 5 and 36, respectively.

In the packaging case carrier B, the bracket 37 on the male screw rod 35 is connected to both sprockets 14 and 15 on the support shaft 13, and the bracket 38 on the male screw rod 36 is mounted on both sides of the rotary drive shaft 18. The brackets 37 and 38 are connected to the sprockets 19 and 20, and the brackets 37 and 38 are connected to each other by a carrier chain receiving rail (not shown).

A packaging case length adjusting motor 39 is installed in the machine frame 12. The rotation of one of the two sprockets 40 and 41 on the output shaft 39a is transmitted to the sprocket 45 through the sprocket 42, the sprocket 43 and the chain 44 inside the machine frame 12, and further, to the sprocket 45 of the machine frame 12. On the outside, the sprocket 46, the sprocket 47, the sprocket 48, the sprocket 54, the sprocket 50, the sprocket 51 and the chain 52, and the sprocket 53 on the male screw rod 35.
And to the sprocket 49 on the male screw rod 32. The rotation of the other sprocket 41 on the output shaft 39a is transmitted to the sprocket 56a via the chain 55 on the outside of the machine frame 12, and is further coaxial with the sprocket 56b to the sprocket 57, the sprocket 58, the sprocket 59, and the sprocket 60. Through the sprocket 61, sprocket 62, sprocket 63, sprocket 64 and chain 65
It is adapted to be transmitted to the upper sprocket 66.

A potentiometer 68 is attached to a bracket 67 on the machine frame 12 near the output shaft 39a of the packaging case length adjusting motor 39, and the rotation of the output shaft 39a is transmitted to the potentiometer 68 via gears 69 and 70. It is being transmitted. The potentiometer 68 is connected to a controller 71, and the controller 71 controls the motor 39 based on an input signal from the potentiometer 68.

Next, each of the devices B and C shown in FIGS.
The drive mechanism G of 1, C2, D and K will be described in detail together with a packaging case width adjusting mechanism which is a part thereof. A drive motor 72 is installed in the machine casing 12. The output shaft 72a is rotated by the sprocket 73, the chain 74 and the sprocket 7
The sprocket 77, 78, which is transmitted to the rotary shaft 76 via the rotary shaft 76 and is located on the rotary shaft 76 outside the machine frame 12.
The sprocket 78, the chain 79, and the sprocket 80 are transmitted to the rotary drive shaft 18 of the packaging case carrier B. Further, the rotation of the output shaft 72a is transmitted to the rotary drive shaft 331 of the article conveying devices C1 and C2 via the other sprocket 77, the chain 81 and the sprocket 82 on the rotary shaft 76 outside the machine frame 12. It has become.

Rotational drive shaft 1 of the packaging case carrier B
A control rotary shaft 83 is supported by the machine frame 12 adjacent to the control shaft 8. A gear 84 is coaxially connected to the sprocket 21 adjacent to the sprocket 21 rotatably supported on the rotary drive shaft 18 so as to rotate integrally with the sprocket 21, and a gear 85 is attached to the control rotary shaft 83. Is rotatably supported integrally, and both gears 84 and 85 are meshed with each other. Further, a gear 86 is connected to the sprocket 19 coaxially adjacent to the sprocket 19 rotatably supported by the rotary drive shaft 18, and a gear 87 integrally rotates with the control rotary shaft 83. The gears 86 and 87 are supported so as to be capable of meshing with each other. Both the sprockets 19 and 20 and the gear 86 on the rotary drive shaft 18 in the bracket 38 and the gear 87 on the control rotary shaft 83 are mounted together with the bracket 38 on both shafts 1.
It can move along 8,83.

Incidentally, the rotary shaft 332 for control is attached to the machine frame 12 adjacent to the rotary drive shaft 331 of the article transporting devices C1 and C2.
Is supported. Output shaft 88 supported in the machine frame 12
A first differential gear mechanism 89 is provided on the top. In this differential gear mechanism 89, bevel gears 91 are rotatably supported at both ends of a connecting shaft 90 inserted into the coaxial shaft 88 so as to be orthogonal to the axial direction of the output shaft 88. Bevel gears 92 and 93 are rotatably supported on the output shaft 88 on both sides of the shaft and are meshed with the bevel gear 91 on the connecting shaft 90.

An output shaft 94 is supported in the machine frame 12 adjacent to the first differential gear mechanism 89.
A second differential gear mechanism 95 is provided on the upper part 4. In this operating gear mechanism 95, bevel gears 97 are rotatably supported at both ends of a connecting shaft 96 inserted into the coaxial shaft 94 so as to be orthogonal to the axial direction of the output shaft 94. Bevel gears 9 on the output shaft 94 on both sides
8, 99 are rotatably supported and meshed with both bevel gears 97 on the connecting shaft 96.

The machine frame 1 is adjacent to the second differential gear mechanism 95.
A packaging case width adjusting motor 100 as a rotation adjusting means is installed in the unit 2. The output shaft 94 of the second differential gear mechanism 95 has a pair of sprockets 101, 1
02 is rotatably supported and is connected to the bevel gear 99 so as to be integrally rotatable. Output shaft 10 of this motor 100
The rotation of 0a is transmitted to the sprocket 101 via the sprocket 103 and the chain 104. In the first differential gear mechanism 89, its output shaft 8
A sprocket 105 is rotatably supported by 8 and is integrally rotatably connected to the bevel gear 93. The rotation of the output shaft 100a of the motor 100 is caused by the sprocket 103,
Chain 104, sprocket 101, sprocket 1
02 and the chain 106 to be transmitted to the sprocket 105.

In the first differential gear mechanism 89, a sprocket 107 is rotatably supported on an output shaft 88 thereof and is integrally rotatably connected to a bevel gear 92. Further, in the second differential gear mechanism 95, a sprocket 108 is rotatably supported by a rotary shaft 94 thereof and is integrally rotatably connected to a bevel gear 98. A pair of sprockets 1 is attached to a rotary shaft 76 to which the rotation of the drive motor 72 is transmitted.
09 and 110 are integrally rotatably supported, and the rotation of one sprocket 109 is transmitted to the sprocket 107 on the first differential gear mechanism 89 side via the chain 111, while the other sprocket 110 is also rotated. Rotation of the second differential gear mechanism 95 via the chain 112.
It is adapted to be transmitted to the side sprocket 108.

The rotary shaft 113 is supported by the machine frame 12 above the output shaft 88 of the first differential gear mechanism 89.
The rotation of 8 is transmitted to the rotating shaft 113 via a pair of gears 114a and 114b. Outside the machine frame 12, a pair of sprockets 115, 1 are attached to the rotary shaft 113.
16 is rotatably supported integrally. A sprocket 117 is integrally rotatably supported on the outside of the machine frame 12 by the control rotary shaft 83 at the rear end of the machine frame 12,
The rotation of one sprocket 115 out of both the sprockets 115 and 116 on the 13 is transmitted to the sprocket 117 via the chain 118. A sprocket 119 is integrally rotatably supported on the outside of the machine frame 12 by a control rotary shaft 332 of the article transporting devices C1 and C2, and the other sprocket 116 on the rotary shaft 113 rotates via a chain 120. It is adapted to be transmitted to this sprocket 119.

A sprocket 121 is integrally rotatably supported on the output shaft 94 of the second differential gear mechanism 95, and as shown in FIG. 5, the sprocket 121 is rotationally driven by the article inserting device D and the article receiving device E. A sprocket 122 is integrally rotatably supported on the shaft 333, and the rotation of the sprocket 121 is transmitted through the chain 123 to the sprocket 1.
22 is transmitted.

The encoder 12 is attached to each of the brackets 124 and 125 on the outside of the machine frame 12 near the rotary drive shaft 18 at the front end of the machine frame 12 and the control rotary shaft 83.
6, 127 are attached, the rotation of the rotary drive shaft 18 is transmitted to one encoder 126 via both gears 128 and 129, and the rotation of the control rotary shaft 83 is transmitted to both gears 130, 130. It is adapted to be transmitted to the other encoder 127 via 131. The encoders 126 and 127 are connected to the controller 71, and the controller 71 receives the input signals from the encoders 126 and 127 to adjust the packaging case width adjusting motor 100.
To control.

Next, the flap folding device K will be described in detail. The device K comprises an inner flap folding device K ₁ shown in FIGS. 6 to 13 and an outer flap folding device K ₂ shown in FIGS. 6 and 15 to 20.

First, the inner flap folding device K ₁ will be described in detail. The packaging case length adjusting mechanism F shown in FIG.
As described above, a pair of front and rear male screw rods 33, 32 are rotatably supported at the center of the machine frame 12 in the front-rear direction, and the movable base plate 34 is screwed to the male screw rods 32, 33. The machine frame 12 on the opposite side of the movable base plate 34
A fixed base plate 132 is attached to the inside of the movable base plate 34 so as to face the movable base plate 34 above the male screw rods 32 and 33. A pair of front and rear male screw rods 134, 133, 136 and 135 are rotatably erected on the two base plates 34 and 132, respectively. The male screw rods 133 and 134 on the fixed base plate 132 and the movable base plate 34 are mounted on the movable base plate 34. Plates 137 and 138 are respectively screwed into the male screw rods 135 and 136 of the
Both plates 137 and 138 are moved up and down by the rotation of 33, 134, 135 and 136. On both base plates 132 and 34, a pair of front and rear rotary shafts 140,
139, 142 and 141 are the male screw rods 133 and 13 respectively.
It is rotatably set up inside 4,135,136 and is rotatably inserted in both plates 137,138. Both rotary shafts 139 and 140 protruding above the plate 137 on the fixed base plate 132 side, and the plate 1 on the movable base plate 34 side.
The pressing rotary bodies 143, 144, 145, 146 are rotatably and integrally inserted into the rotary shafts 141, 142 protruding above the rotary shaft 38, respectively.
The plates 145, 146 are rotatably supported on the plates 137, 138 and can move vertically with the plates 137, 138 with respect to the rotary shafts 139, 140, 141, 142 in the axial direction.

Each pressing rotary member 143, 144, 14
5 and 146, as shown in FIGS. 10 and 11, the support hole 147a is formed in the center of the body 147, and the recess 148 is formed in the center M on the outer periphery of the body 147.
The rotary shafts 139, 140, 141, 142 are formed so as to extend along both ends of the rotary shaft 139, 140, 141, 142, and are inserted into the support holes 147a. A support shaft 149 is attached to one side of the recess 148 so as to extend along the center of the body 147, and a plurality of pressing plates 150 are attached to the center M of the body 147 with respect to the support shaft 149 in the recess 148. On the other hand, they are rotatably supported on a plane orthogonal to each other and are arranged side by side in the direction along the center M. Each pressing plate 150 is biased by the compression coil spring 151 in the recess 148, and the elastic force of each pressing plate 150 causes the pressing portion 150a of each pressing plate 150 to move.
It projects from the outer periphery of 47 and is stationary.

In particular, these pressing plates 150 are rotatable independently of each other. Then, each pressing rotating body 14
3, 144, 145, 146 rotate facing the respective positioning portions 31 of the packaging case transporting device B, and the pressing portions 150a of the respective pressing plates 150 pass over the left and right end portions of the respective positioning portions 31 with the rotation. It is like this. In that case, when the pressing plates 150 of the rear pressing rotary bodies 143 and 145 face the positioning portions 31, the positioning portions 31
Is rotated in the direction opposite to the moving direction P of the moving body P, and the moving direction P of both the pressing rotary members 144 and 146 on the front side is changed.
It is designed to rotate in the same direction as.

Rotating shafts 152 and 153 are provided upright on the base plates 132 and 34 behind the rear rotating bodies 143 and 145 and adjacent to the rear rotating bodies 143 and 145.
It is inserted in 38. Both plates 137 and 138
The pressing levers 154 and 15 are attached to the rotary shafts 152 and 153.
5 is rotatably supported integrally, and plates 137, 138
At the same time, it is vertically movable with respect to the rotary shafts 152 and 153. Both pressing levers 154 and 155 are both plates 13
7,138 and extends rearward, and the pressing plate 1 is attached to the tip of the pressing plate 1.
54a and 155a are attached.

On both base plates 132 and 34, the rotary shafts 152 and 1
53 is an interlocking lever 1 having long holes 156a and 157a
56 and 157 are integrally rotatably supported, and extend rearward under the both pressing levers 154 and 155. The drive links 160, 161 are integrally rotatably supported by the rotary shafts 158, 159 on the two base plates 132, 34, and the interlocking pins 160a, 161a attached to the tip ends of the drive links 160, 161a are long. The holes 156a and 157a are engaged. When the drive links 160 and 161 rotate, the interlocking pins 160a and 161a and the elongated holes 156a and 1
The interlocking levers 156 and 157 swing through a certain angle range via 57a, and the pressing levers 154 and 155 also swing via rotating shafts 152 and 153. In that case, by the quick return mechanism, the pressing plates 154a of the pressing levers 154, 155,
155a is each positioning portion 3 of the packaging case transport device B
The rotational speed of moving away from each positioning portion 31 is higher than the rotational speed of moving closer to 1.

Both male screw rods 3 below both base plates 132 and 34
A rotation drive shaft 162 for rotating the rear pressing rotary bodies 143, 145 on the machine frame 12 between the positions 2 and 33.
A control rotary shaft 163 for rotating the front pressing rotary members 144 and 146, and the pressing lever 15
A rotary drive shaft 164 for swinging the shafts 4, 155 is supported. The rotation of each of the shafts 162, 163, 164 is caused by the gears 165, 166, the gears 167, 168 and the gear 1.
It is adapted to be transmitted to the respective rotary shafts 139, 140, 158 on the fixed base plate 132 via 69, 170. Below the movable base plate 34, each shaft 162, 163,
Gears 171, 173, 175 are supported by 164 so as to be integrally rotatable and movable in the axial direction.
173 and 175 are attached to the movable base plate 34. The rotation of each shaft 162, 163, 164 is caused by rotation of the gears 171, 172,
It is adapted to be transmitted to the rotary shafts 141, 142, 159 on the movable base plate 34 via the gears 173, 174 and the gears 175, 176.

As shown in FIGS. 2 and 4, a sprocket 177 is attached outside the machine frame 12 to the rotary drive shaft 18 on the front end side of the machine frame 12 in the packaging case carrier B, and the rotation thereof is prevented. As shown in FIGS. 6 and 8, the chain 1
Sprocket 1 on the rotary drive shafts 162, 164 via 78, sprocket 179 and sprocket 180
81, 182.

As shown in FIG. 4, in the drive mechanism G, a rotary shaft 183 is supported by the machine frame 12 adjacent to the output shaft 88 of the first differential gear mechanism 89. The sprocket 184 is attached to the outside of the.
The output shaft 88 is rotated by the sprocket 185 and the chain 18
6 and the sprocket 187 are transmitted to the rotary shaft 183, and as shown in FIGS.
The rotation of the sprocket 184 on the No. 3 is transmitted to the sprocket 189 on the control rotary shaft 163 via the chain 188.

As shown in FIG. 7, both the base plates 132, 34
Adjusting motors 190, 191 for height of the packaging case are installed on the output shafts 190a, 191 of the output shafts 190a, 191 as shown in FIG.
The rotation of a is the sprocket 1 on the lower side of both base plates 132 and 34.
92, 193 and chains 194, 195 are transmitted to the sprockets 196, 197, 198, 199 on the male screw rods 133, 134, 135, 136. These potentiometers 200, 201 are mounted on the base plates 132, 34 near the motors 190, 191.
Are attached to the output shafts 190a of the motors 190, 191
The rotation of 191a is caused by the gears 202, 203, 204, 205.
It is adapted to be transmitted to the potentiometers 200 and 201 via. This potentiometer 200, 20
1 is connected to the controller 71, and the controller 71 controls the motors 190 and 191 based on the input signals from the potentiometers 200 and 201.

Next, the outer flap folding device K ₂ shown in FIGS. 6 and 15 to 20 will be described in detail. Male screw rods 206 are rotatably erected on the machine frame 12 on the left and right sides behind the inner flap folding device K _{1 and} on the left and right sides on the front side, and support frames 207 are provided on the upper ends of the male screw rods 206 at their four corners 207a. It is screwed in. Both male screw rods 20 on the rear side
Rotating shafts 208 and 209 are supported by the machine frame 12 near 6 and both male screw rods 206 on the front side, and the rotations thereof are transmitted to the male screw rods 206 via gears 210 and 211. A packaging case height adjusting motor 212 is attached to the outside of the machine frame 12, and its output shaft 212
The rotation of a is transmitted to the sprockets 216 and 217 on both rotary shafts 208 and 209 via the sprocket 213, the chain 214 and the sprocket 215. A potentiometer 219 is attached to a bracket 218 on the machine frame 12 near the motor 212, and the output shaft 2
The rotation of 12a is transmitted to the potentiometer 219 via the gears 220 and 221. The potentiometer 219 is connected to the controller 71, and the controller 71 controls the motor 212 based on an input signal from the potentiometer 219.

The support shaft 2 attached to the rear end of the support frame 207.
In FIG. 20, driven pulleys 221 and 222 are attached on both left and right sides along the axial direction. The left pulley 221 is rotatably supported on the support shaft 220 and is movable in the axial direction of the support shaft 220. The pulley 222 on the right side is rotatably supported by the support shaft 220 so as not to move in the axial direction of the support shaft 220. On the other hand, the rotary drive shaft 22 supported by the front end of the support frame 207.
3, drive side pulleys 224 and 225 are attached to both left and right sides along the axial direction. Left pulley 2
24 is supported so as to be rotatable integrally with the rotary drive shaft 223 and movable in the axial direction of the rotary drive shaft 223.
Further, the pulley 225 on the right side is supported so as to be integrally rotatable with the rotary drive shaft 223, and is prevented from moving in the axial direction of the rotary drive shaft 223. Rotating belts 226 and 227 are wound in parallel with each other between the driven pulleys 221 and 222 and the drive pulleys 224 and 225 via a pulley 228. The two rotary belts 226, 227 are located right above the respective transport chains 23, 24, 25, 26 in the packaging case transport device B, and as shown in FIG.
The rear portion of 27 is located above the inner flap folding device K1.

A male screw rod 229 is rotatably supported at the rear end of the support frame 207, a bracket 230 is screwed to the male screw rod 229, and the bracket 23
The driven pulley 221 is connected to 0. or,
The front portion of the support frame 207 has a pair of front and rear male screw rods 232, 2
31 is rotatably supported, and both male screw rods 231 and
Movable frame 233 is screwed to 32 so that both male screw rods 231 and
The pulley 224 on the drive side is connected to the front end of the movable frame 233 while being bridged between the two.

A bracket 234 is attached to the rear end of the movable frame 233, and the bracket 234 is provided with a bending means 235 for the insertion portion 10a of the outer flap 10. As shown in FIG. 18, a pair of guide bars 236 parallel to each other are attached to the bracket 234 so as to extend horizontally inward, and the movable body 2 is attached to the guide bars 236.
37 is inserted and supported so as to be movable in the axial direction. Below the both guide rods 236, the bracket 234 is
The rotary shaft 238 is supported by the support frame 207, and the rotary shaft 238 is rotatably inserted into the movable body 237 so that the movable body 237 can move along the axis of the rotary shaft 238. An upper holding roller 239 is supported inside the movable body 237 so as to be rotatable integrally with the rotation shaft 238 and movable in the axial direction thereof. Similarly, inside the movable body 237, the lower holding roller 24 is provided.
0 is rotatably supported on the support shaft 241. A groove 239a is formed on the outer circumference of the upper holding roller 239, and a projection 240a is formed on the outer circumference of the lower holding roller 240, which are fitted to each other.

On the outside of the bracket 234 of the movable frame 233, both ends of the tube 242 are attached to both upper and lower mounting portions 245, 2.
It is attached at 46, and the wire 243 as an interlocking rope is inserted into the tube 242. One end of the wire 243 is connected to the outside of the movable body 237 via a pulley 244 on the bracket 234. The other end of the wire 243 extending from the lower mounting portion 246 of the tube 242 is connected to the movable base plate 34 of the inner flap folding device K ₁ . A compression coil spring 247 is wound around the outer circumferences of the guide rods 236 between the outer side of the movable body 237 and the bracket 234, and the elastic force of the compression body causes the movable body 237 to move between the guide rods 2.
36 and the rotary shaft 238, the wire 243 is moved inward, and one end of the wire 243 is also pulled inward with the movement.

On the support frame 207 on the opposite side of the insertion portion bending means 235, the insertion portion bending means 248 having substantially the same structure as this is also provided. That is,
The insertion portion bending means 248 includes a guide rod 249, a movable body 250, a rotary shaft 251, an upper gripping roller 252, a concave ridge 252a thereof, a lower gripping roller 253 and a convex ridge 25 thereof.
3a, a support shaft 254, a tube 255, upper and lower mounting portions 257 and 258 thereof, a wire 256 as an interlocking rope, and a pulley 2.
44 and the compression coil spring 259, the compression coil spring 259 is fitted and inserted on the outer circumference of both guide rods 249 between the movable body 250 and the support frame 207, and the wire 256.
The other end is connected to the fixed base plate 132 on the machine frame 12 side.

As shown in FIG. 19, a mounting plate 260 is attached to the front portion of the movable base plate 34 in front of the insertion portion bending means 235, and the insertion portion bending means 248.
A mounting plate 261 is attached to the inner side of the machine frame 12 in front of, and outer flap folding means 262 and 263 are provided on both mounting plates 260 and 261. In the outer flap bending means 262 and 263, the mounting plates 260 and 2 are attached.
Guide plates 264 and 265 are attached to the carrier 61 adjacent to the carrier chains 23, 24, 25 and 26 of the packaging case carrier B, and guide bars 266 and 267 are mounted on the guide plates 264 and 265 at their front end portions. It is attached in and is extended to the rear. The guide rods 266 and 267 are inclined so that they approach each other as they extend from the rear end toward the front end and extend downward. As shown in FIG. 20, the movable frame 233 is provided in front of the outer flap bending means 262.
The outer flap correcting means 268 is provided on the support frame 207 and the outer flap bending means 263.
The outer flap correcting means 269 is provided on the mounting plate 270 and the support frame 207 in front of. Rotating shafts 271, 272 extending in the vertical direction are supported by the movable frame 233 and the mounting plate 270, and cylindrical rotating bodies 273, 274 integrally rotate with the rotating shafts 271, 272 below the movable frame 233 and the mounting plate 270. This rotating body 2 is attached as much as possible.
Pulleys 275 and 276 are integrally rotatably mounted on 73 and 274. On the movable frame 233 and the mounting plate 270, levers 277 and 278 are rotatably supported, and pressing rollers 281 and 280 are attached to the rotating belts 226 and 227 with respect to rotating shafts 279 and 280 supported on the lower side of the tip end thereof.
Is attached so as to be integrally rotatable adjacent to. Pulleys 283 and 284 are integrally rotatably attached to the rotating shafts 279 and 280 on the pressing rollers 281 and 280, respectively. Belts 285 and 286 are wound around. The pins 287 and 288 on the movable frame 233 and the mounting plate 270 and the pins 28 on the levers 277 and 278.
The tension coil springs 291 and 292 are connected between the levers 277 and 278 and the pins 289 and 290 on the levers 277 and 278 move on the movable frame 233 and the mounting plate 270. Stoppers 293,29
It stops when it comes into contact with No. 4. A rotating shaft 295 is supported by the machine frame 12 above the pressing rollers 281, 284, and circular pressing plates 29 are provided on both left and right sides of the rotating shaft 295.
6,297 are attached. This pressing plate 296, 29
The lower end of 7 and the inner ends of the pressure rollers 281 and 282 are close to each other with a slight gap.

A rotating shaft 298 is supported by the machine frame 12 above the rotating bodies 273 and 274, and the rotation of the rotating shaft 298 is caused by rotation of the rotating bodies 273 and 274 via gears 299, 300, 301 and 302. It is adapted to be transmitted to the shafts 271, 272. The rotation of the rotary drive shaft 18 in the packaging case carrier B is rotated outside the machine frame 12 via the sprocket 303, chain 304, sprocket 306 and sprocket 307 on the mounting plate 305, chain 308 and tension sprocket 309. The belts 226 and 227 are transmitted to the sprocket 310 on the rotary drive shaft 223. Further, the rotation of the rotary drive shaft 223 is caused by the sprocket 311.
And the rotary shafts 295, 29 via the chain 312.
8 is transmitted to the upper sprockets 313 and 314. Further, the rotation of the rotary drive shaft 298 is caused by the sprocket 315, 316 and the chain 317, on both the left and right sides thereof.
Sprockets 319, 320 on the rotary shafts 238, 251 of the insertion portion bending means 235, 248 via 318.
To be transmitted to. In addition, this rotary shaft 23
The rotation of 8,251 may be transmitted to the support shafts 241 and 254 of the lower holding rollers 240 and 253.

On the other hand, the rotation of the male screw rod 36 of the packaging case length adjusting mechanism F is performed by rotating the sprocket 321 and the chain 3.
It is adapted to be transmitted to the sprocket 323 on the male screw rod 232 on the outer side of the support frame 207 via 22a and the chain 322b. The interlocking between the chain 322a and the chain 322b is omitted. Further, the rotation of the male screw rod 232 on the outer side of the support frame 207 causes the sprocket 324, the chain 325, and the sprocket 3 to rotate.
26, the sprocket 327, the sprocket 328, and the sprocket 329, and is transmitted to the sprocket 330 on the male screw rod 231 and the sprocket 331 on the male screw rod 229.

Next, the operation of the packaging machine configured as described above will be described in detail. First, the devices B, K ₁ and K ₂ are adjusted according to the size of the packaging case 1 shown in FIG.

As shown in FIG. 2, when a signal relating to the length L of the case body 2 is input to the controller 71, the rotation of the packaging case length adjusting motor 39 is caused by the chain 44 and the chain 52 to move to the rear of the packaging case carrier B. Side male screw rod 35 and the inner flap folding device K ₁ are transmitted to the rear male screw rod 32, and the chain 55 and the chain 65 allow the male screw rod 36 on the front side of the packaging case transport device B to be transmitted.
And the rotation of the male screw rod 36 is transmitted to the male screw rod 33 on the front side of the inner flap folding device K ₁ , and the rotation of the male screw rod 36 is further transmitted.
2a, the chain 322b, and the chain 325 form the male screw rods 229, 231, ₂ of the outer flap folding device K _2.
32 is transmitted. Then, by the rotation thereof, both the front and rear brackets 3 of the packaging case transport device B
8, 37, the movable base plate 34 of the inner flap folding device K ₁ and the movable frame 233 of the outer flap folding device K ₂ move along the male screw rods 35, 36, 32, 33, 229, 231 and 232. To do.

With the movement, in the packaging case carrier B, both sprockets 14 and 15 in the bracket 37 on the male screw rod 35 on the rear side move along the spindle 13, and on the male screw rod 36 on the front side. Both sprockets 19 and 20 and both gears 86 and 87 in the bracket 38 move along the rotary drive shaft 18 and the control rotary shaft 83.
In the inner flap folding device K ₁ , the movable base plate 3
4, the plate 138, the front and rear pressing rotary members 146,
Components such as 155, the pressing lever 155, the interlocking lever 157, the drive link 161, the packaging case height adjusting motor 191 and the potentiometer 201 move integrally with the movable base plate 34. In the outer flap folding device K ₂ , the upper and lower holding rollers 239 and 240 of the insertion portion folding means 235 on the movable frame 233, the guide rod 266 of the outer flap folding means 262, and the outer flap straightening means. The pressing roller 281 and the pressing plate 296 of the means 268 move integrally with the movable frame 233, and at the same time, the driving pulley 224 on the movable frame 233, the driven pulley 221 on the bracket 230, the rotary belt 226 and the like move. The support shaft 220 and the rotation drive shaft 223 are integrally formed with the frame 233 and the bracket 230.
And move along both rotation axes 295 and 298.

Then, the packaging case length adjusting motor 39
The detection signal is input to the controller 71 from the potentiometer 68 that detects the rotation of the. When this input signal matches the stored data based on the length L of the case body 2, the controller 71 causes the packaging case length adjusting motor 3 to move.
Stop 9. Therefore, as shown in FIG. 2 and FIG.
Holding part 27 and transfer part 2 on both transfer chains 23, 24
8 approaches and separates from the holding part 29 and the carrying part 30 on both carrying chains 25 and 26, and each packaging case positioning part 31
In, the both holding parts 27, 29 and the both carrying parts 28, 30 are set according to the length L of the case body 2. Further, in the inner flap folding device K ₁ , the two pressing rotors 145, 146, the pressing lever 155, etc. on the movable base plate 34 approach and separate from the two pressing rotors 143, 144 and the pressing lever 154 on the fixed base plate 132. At the same time, in the outside flap bending device K ₂ , the insertion portion bending means 235, the outside flap bending means 262, the outside flap straightening means 268, etc. on the movable frame 233 and the rotation belt 226 are fixed side insertion portion bending means. Means 248, outer flap folding means 263,
The outer flap correcting means 269 and the like and the rotating belt 227 are moved closer to and away from each other, and they are set according to the length L of the case body 2.

On the other hand, the drive motor 72 is rotated by the chain 7
4 and the chain 79, which is transmitted to the rotary drive shaft 18 of the packaging case carrier B, and the inner carrier chains 24, 2
6 rotates. The rotation of the drive motor 72 is caused by the rotation of the chain
4, the chain 111, the bevel gears 92 and 93 of the first differential gear mechanism 89, and the transmission to the output shaft 88, and the chain 118 to the control rotary shaft 83. The rotation of the rotary shaft 83 is transmitted to the sprockets 21 and 19 via the gears 85, 87, 84 and 86, and the outer transfer chains 23 and 25 rotate.

As shown in FIG. 4, when a signal (width change dimension) related to the width W of the case body 2 is input to the controller 71, the rotation of the packaging case width adjusting motor 100 causes the rotation of the chain 104, the chain 106, and the first case. Differential gear mechanism 89
It is transmitted to the output shaft 88 via the bevel gears 93, 91.
In this case, due to the action of the first differential gear mechanism 89, the rotation speed of the output shaft 88 that rotates in conjunction with the drive motor 72 changes according to the rotation speed of the packaging case width adjustment motor 100. In contrast to the inner carrier chains 24 and 26 that rotate only by 72, the outer carrier chains 2
3, 25 rotate relative to each other.

The rotations of the rotary drive shaft 18 and the control rotary shaft 83 are transmitted to both encoders 126 and 127, respectively.
Those detection signals are input to the controller 71. When the difference between the detection data of both encoders 126 and 127 and the stored data based on the width W of the case body 2 match, the controller 71 stops the packaging case width adjustment motor 100. Therefore, as shown in FIG. 2 and FIG. 7, the holding portions 27, 29 on both outer transport chains 23, 25 approach and separate from both transport portions 28, 30 on both inner transport chains 24, 26. In each packaging case positioning portion 31, both gripping portions 27, 29 and both transporting portions 28, 30 are set according to the width W of the case body 2.

Further, the rotation of the rotary drive shaft 18 which is interlocked with the drive motor 72 is transmitted to both rotary drive shafts 162 and 164 in the inner flap folding device K ₁ via a chain 178, and the rotation thereof causes the rear drive shafts 162 and 164 to rotate. Pressing rotating body 143,1
45 rotates and both drive links 160, 161
Both pressing levers 154 and 155 rotate via. The rotation of the output shaft 88 of the first differential gear mechanism 89 is controlled by the chain 186, the rotary shaft 183, and the chain 188 to control the rotary shaft 163 of the inner flap folding device K ₁ .
Is transmitted to the front pressing roller 14 by this rotation.
4,146 rotates. Both rear pressing rotary bodies 143, 1
In 45, since it is rotated only by the drive motor 72, each of the transport chains 23 of the packaging case transport device B,
The rotation timings for 24, 25, and 26 are not changed, but in both front pressing rotary bodies 144 and 146,
The rotation timing is set according to the width W of the case body 2 by the action of the first differential gear mechanism 89.

Further, as shown in FIGS. 6 and 7, when a signal relating to the height H of the case body 2 is input to the controller 71, in the inner flap folding device K ₁ , the packaging case height adjusting motors 190, 191. Rotation of the male screw rods 133, 134, 1 via the chains 194, 195.
35, 136, the pressing rotors 143, 144, 145, 146 on the plates 137, 138 and the pressing levers 154, 155 move up and down. Further, in the outer side flap folding device K ₂ , the rotation of the packaging case height adjusting motor 212 is caused by the rotation of the chain 214 and the both rotating shafts 20.
It is transmitted to each male screw rod 206 via 8, 209, and the whole support frame 207 moves up and down.

Then, the potentiometers 200, 201, 219 for detecting the rotations of the respective packaging case height adjusting motors 190, 191, 212 are connected to the controller 7.
The detection signal is input to 1. When this input signal matches the stored data based on the height H of the case body 2, the controller 71 causes the packaging case height adjusting motor 190,
191 and 212 are stopped. Therefore, each pressing rotary member 143, 144, 14 in the inner flap folding device K ₁ is
5, 146, the pressing levers 154, 155, and the means 235, 248, ₂ in the outer flap folding device K ₂ .
62, 263, 268, 269 and the rotating belt 226.
227 is set according to the height H of the case body 2.

By the way, in the insertion portion folding means 235 and 248 of the outer flap folding device K ₂ , as shown in FIG. 18, when the height H of the case main body 2 changes, the outer flap 10 also changes, Since the outer flap 10 is in the horizontal state, the distance between the left and right holding rollers 239 and 252 must be changed. Therefore, the wires 243, 2
56 is used to adjust the interval.

That is, when the movable base plate 34 of the inner flap folding device K ₁ is moved horizontally inward by L1, the entire insertion portion bending means 235 together with the bracket 234 on the movable frame 233 is movable by L1. Move in the same direction as 34. Conversely, the same applies when the movable base plate 34 horizontally moves outward. Further, the entire support frame 207 is moved by the moving distance H1.
Only downward, the left and right insertion portion bending means 235, 24
The whole 8 moves down. At this time, the wires 243 and 256 are loosened by the vertical movement distance H1.
7,250 and holding rollers 239,240,252,2
53 moves horizontally inward by H1 by the elastic force of the compression coil springs 247 and 259, and the looseness of the wires 243 and 256 is absorbed by the moving distance H1. vice versa,
The entire support frame 207 includes left and right insertion portion bending means 235.
When moving up together with the whole 248, the movable bodies 237, 25
0 and the holding rollers 239, 240, 252, 253 horizontally move outward against the elastic force of the compression coil springs 247, 259. Therefore, in the insertion portion bending means 235 that moves together with the movable base plate 34, the sum of the vertical movement distance H1 of the support frame 207 and the movement distance L1 of the movable base plate 34 changes, and the other insertion portion bending means 248. Then, the vertical movement distance H1 of the support frame 207 changes.

The packaging case 1 supplied from the packaging case opening device A to the packaging case conveying device B is opened as shown in FIG. 1, and the lower wall 2c of the case body 2 is placed on each packaging case positioning portion 31. Both mouth portions 3 of the lever face the first article conveying device C1 and the article receiving device E on both sides of the positioning portion 31. Then, the packaging case 1 is transported to the rear in a state of being sandwiched between the two transport units 28 and 30 and the two sandwiching units 27 and 29 at the four corners.

When an article (not shown) is placed on the second article transport device C2, the article is transferred to the article pushing device D. Then, the article is pushed into the case main body 2 on the packaging case positioning portion 31 of the packaging case transporting device B from one mouth 3. At this time, the article receiving device E prevents the articles in the packaging case 1 from dropping at the other mouth 3 of the case body 2. The packaging case 1 thus supplied with the articles is transferred to the flap folding device K.

Next, the operation of the flap folding device K will be described in detail. First, the packaging case 1 is conveyed from above to the inside flap folding device K _{1 while} being held by the rotating belts 226 and 227.

Then, as shown in FIG. 12, the inner flap 8a on the front side comes into contact with the body 147 (folding member) of the pressing rotary bodies 143, 145 on the rear side, and the mouth portion 3 of the case body 2 is closed.
Begins to be bent to the side, and the pressing levers 154, 1
With the reciprocating rotation of 55, the pressing plates 154a and 155a come into contact with the inner flap 8b on the rear side and the inner flap 8b.
Also begins to be bent toward the mouth 3. As the packaging case 1 is conveyed, the inner flaps 8a, 8b are bent along the fold line 9 from the outside of the mouth 3 to the vicinity of the mouth 3, and the bending position is the rear of the pressing rotators 143, 145. Body 147
Will be held by.

Next, as shown in FIG. 7, each pressing rotary member 1
The pressing portions 150a of the pressing plates 150 of 43, 144, 145, and 146 contact the inner flaps 8a and 8b, and the inner flaps 8a and 8b are largely bent toward the inside of the mouth portion 3. At this time, each pressing plate 150 rotates against the elastic force of the compression coil spring 151 due to the resistance force against the packaging case 1. Then, as shown in FIG. 13, each pressing plate 150 presses the inner flaps 8a and 8b while pressing the inner flaps 8a and 8b.
As shown in FIG. 14, the inner flaps 8a and 8b return to the vicinity of the mouth portion 3 due to their elasticity when they are separated from the a and 8b.
It is maintained even if it separates from the trunk 147 of 146.

In particular, in the inner flap folding device K _{1 according} to the present embodiment, the mouth portion 3 is provided while the packaging case 1 in which the inner flaps 8a and 8b are provided in the mouth portion 3 of the cylindrical case body 2 is being conveyed. The inner flaps 8a, 8b protruding from the first portion are first bent from the outside of the mouth portion 3 to the vicinity of the mouth portion 3 by the body portion 147 of the rear pressing rotary members 143, 145 and the pressing levers 154, 155, and further, the inner flaps 8a. , 8b are largely bent to the inside of the mouth portion 3 by the pressing plates 150 of the pressing rotary bodies 143, 144, 145, 146, so that the bent inner flaps 8a, 8b have elasticity to project to the outside of the mouth portion 3. The inner flaps 8a and 8b can be surely bent in the vicinity of the mouth 3 by correcting the inner flaps to be small.

In this case, the pressing rotary members 143, 144,
The pressing plates 150 of 145 and 146 are arranged side by side along the center of rotation M and can rotate independently of each other.
Insertion amount of the pressing portion 150a of 0 is the inner flap 8a, 8b
Of the pressure plate 150 and the elastic force of the pressure plate 150 due to the compression coil spring 151.
The straightening effect on the inner flaps 8a and 8b can be averaged to surely bend. The compression coil spring 1
As for 51, it is also possible to change to an optimum one having different elastic forces depending on the type of the packaging case 1.

In this way, the inner flap folding device K
_The packaging case 1 in which the inner flap 8 is folded by 1 is conveyed to the outer flap folding device K ₂ in the state shown in FIG. Then, as shown in FIG. 18, the outer flap 10
When the insertion portion 10a is inserted between the upper holding rollers 239 and 252 and the lower holding rollers 240 and 253, the insertion portion 10a is bent at the folding line 11a.

Thereafter, as shown in FIG. 19, the outer flap 10 moves the upper and lower holding rollers 239, 240, 252, 2
When it separates from 53 and comes into contact with the guide rods 266 and 267,
The outer flap 10 is bent downward along the folding line 11, and the insertion portion 10a of the outer flap 10 is guided by the guide plates 264, 2
It is guided by 65 and is inserted into the mouth portion 3 of the case body 2 from the outside of the inner flaps 8a and 8b.

Next, as shown in FIG. 20, with the outer flap 10 supported by the outer circumferences of the rotating bodies 273 and 274, the pressing plates 296 and 297 are attached to the case body near the folding line 11 of the outer flap 10. 2 is pressed against the upper wall 2a and the pressure rollers 281 and 283 are pressed against the outer flap 10, the outer flap 10 and the upper wall 2a are pressed against each other by the pressing plates 296 and 297 and the pressing rollers 281 and 28.
The outer flap 10 is sandwiched by the two and is reliably bent by the force acting on the folding line 11.

Then, the packaging case 1 is pressed by the pressing plates 296, 2
Even if the outer flap 10 is separated from the pressing rollers 281, 284 and 97, the outer flap 10 is bent by the inner flaps 8a, 8b along the inner flaps 8a, 8b as shown in FIG. The flaps 8a and 8b are closed together.

In particular, in the outside flap folding device K _{2 according} to this embodiment, during the transportation of the packaging case 1 in which the outside flap 10 is provided in the mouth portion 3 of the tubular case body 2, the protrusion is projected from the mouth portion 3. First, from the outside of the mouth portion 3, the outer flap 10 is attached to the guide rods 266 and 267 and the guide plates 264 and 26.
5, the outer flap 10 and the case main body 2 are bent to the vicinity of the mouth portion 3 by both sides of the folding line 11 of the outer flap 10 and the pressing plates 296, 297 and the pressing roller 2 are provided.
Since it is sandwiched by 81 and 282, the bent outer flap 10 can be corrected so as to reduce the elasticity of protruding to the outside of the mouth portion 3, and the outer flap 10 can be reliably bent near the mouth portion 3.

In this case, the levers 277 and 278 supporting the pressing rollers 281 and 282 are the tension coil springs 291 and
Since it is urged by 292, the levers 277 and 278 rotate due to the balance between the resistance force of the outer flap 10 and the elastic force of the tension coil springs 291 and 292, and the pressure rollers 281 and 280 are pressed against the outer flap 10. The outer flap 10 can be surely corrected with the optimum force. The tension coil springs 291 and 292 can be changed to optimal ones having different elastic forces according to the type of the packaging case 1.

Further, in the present embodiment, when the width W of the case body 2 changes, the first differential gear mechanism 89 is utilized in the drive mechanism G to position the packaging case of the packaging case carrier B. The rotation timing of the pressing rotators 144 and 146 on the front side of the portion 31 and the inner flap folding device K ₁ can be adjusted according to the width W of the case body 2. further,
When the height H of the case main body 2 changes, the pressing rotors 143, 144, 145 of the inner flap folding device K ₁ are changed.
146, the pressing levers 154, 155, the insertion portion bending means 235, 248, the flap bending means 262, 263, and the flap correcting means 268, 269 of the outer flap bending device K ₂ are set to the height H of the case body 2. Can be adjusted to suit.

On the other hand, when the length L of the case body 2 changes, in the inner flap folding device K ₁ , the front and rear pressing rotary members 144 and 143 and the pressing lever 154 on the fixed base plate 132, and the movable base. Both front and rear pressing rotary members 14 on the plate 34
It is possible to adjust the interval between the 6, 145 and the pressing lever 155 according to the length L of the case body 2. or,
In the outer flap folding device K ₂ , the space between the respective means 248, 263, 269 corresponding to the one mouth part 3 and the respective 235, 262, 268 corresponding to the other mouth part 3 is set to the case main body 2 Can be adjusted according to the length L of the.

In the outer flap folding device K ₂ , the left and right insertion portion folding means 235 and 248 are as described above.
The change in the height H of the case body 2 is caused by the bending means 23.
The wire 24
By utilizing 3,256, both of the folding means 235, 24
8 the vertical movement distance H1
It has been replaced with an interval adjustment distance of 8. Therefore, it is not necessary to provide a space adjusting mechanism between the folding means 235 and 248, which is necessary when the height H of the case main body 2 changes, to the support frame 207, and the structure becomes very simple.

[0085]

According to the flap folding device K ₂ of the present invention, the tubular casing body 2 is projected from the mouth portion 3 while the packaging case 1 provided with the flap 10 on the mouth portion 3 is being conveyed. First, from the outside of the mouth portion 3 of the flap 10, the guide member 26
6, 267, 264, 265 to the vicinity of the mouth portion 3, and further, the flap 10 and the case body 2 are pressed by the pressing members 296, 297 on both sides of the folding line 11 of the flap 10.
Also, since the flap 10 is sandwiched between the pressing members 281, 282, the elasticity of the folded flap 10 protruding toward the outside of the mouth 3 is corrected to be small, and the flap 10 can be surely bent near the mouth 3.

In this case, since the elastic force is applied to the pressing members 281, 282, the pressure contact force of the pressing members 281, 282 with respect to the flap 10 is optimal due to the balance between the resistance force of the flap 10 and this elastic force. In such a state, the flap 10 can be surely corrected.

Further, when the height H of the case body 2 changes, the insertion portion bending means 235 of the flap folding device K ₂ is changed.
It is possible to adjust 248, the flap bending means 262, 263 and the flap correcting means 268, 269 according to the height H of the case body 2.

On the other hand, when the length L of the case body 2 changes, in the flap folding device K ₂ , the one mouth 3
The intervals between the respective means 248, 263, 269 corresponding to and the respective 235, 262, 268 corresponding to the other mouth portion 3 can be adjusted according to the length L of the case body 2.

When the height H of the case main body 2 is changed by the both insertion portion bending means 235 and 248 in the flap bending device K ₂ , the interlocking ropes 243 and 256 are used to
Since the vertical movement distance H1 of the both folding means 235, 248 is replaced with the distance adjustment distance of the both folding means 235, 248, the both folding means necessary when the height H of the case body 2 changes. The space adjusting mechanism between the means 235 and 248 does not need to be specially provided on the support frame 207, and the structure becomes very simple.

[Brief description of drawings]

FIG. 1 is a perspective view of a packaging case showing a state in which a case body is opened.

FIG. 2 is a schematic plan view showing a packaging case length adjusting mechanism in the packaging case transport device.

FIG. 3 is a schematic rear view of the same.

FIG. 4 is a schematic plan view showing a packaging case width adjusting mechanism in the drive mechanism of each device.

FIG. 5 is a schematic rear view of the same.

FIG. 6 is a schematic front view showing a flap folding device.

FIG. 7 is a schematic plan view showing an inner flap folding device.

FIG. 8 is a schematic plan sectional view of the same.

FIG. 9 is a schematic front view of the same.

FIG. 10 is a plan view showing only a pressing rotating body.

FIG. 11 is a front view of the same.

FIG. 12 is a schematic plan view showing the bending action of the inner flap by the body portion of the pressing lever and the pressing rotating body.

FIG. 13 is a schematic plan view showing the bending action of the inner flap by the pressing plate of the pressing rotating body.

FIG. 14 is a perspective view of the packaging case showing a state in which the inner flap is bent at the mouth of the case body.

FIG. 15 is a schematic plan view showing an outer flap folding device.

16 is a schematic partial enlarged plan view of FIG.

FIG. 17 is a schematic front sectional view of the same.

18 is a schematic cross-sectional view taken along line XX of FIG.

19 is a schematic cross-sectional view taken along the line YY of FIG.

20 is a schematic sectional view taken along line ZZ of FIG.

FIG. 21 is a perspective view of the packaging case showing a state in which the outer flap is bent at the mouth of the case body.

[Explanation of symbols]

1 packaging case, 2 case body, 3 mouth parts, 8a, 8
b inner flap, 10 outer flap, 10a insertion part, 23 carrier chain, 24 carrier chain, 25
Transport chain, 26 Transport chain, 27 Holding part, 2
8 transport unit, 29 holding unit, 30 transport unit, 31 packaging case positioning unit, 34 movable base plate, 39 packaging case length adjusting motor, 72 drive motor, 89 differential gear mechanism, 100 packaging case width adjusting motor ( Rotation adjusting means), 132 fixed base plate, 143 pressing rotating body, 144
Pressing rotator, 145 pressing rotator, 146 pressing rotator, 147 body, 150 pressing plate, 151 compression coil spring, 154 pressing lever, 155 pressing lever, 1
90 Packaging Case Height Adjusting Motor, 212 Packaging Case Height Adjusting Motor, 233 Movable Frame, 235 Inserting Part Bending Means, 239 Holding Roller, 240 Holding Roller, 243 Wire (Interlocking Line), 248 Inserting Part Folding Bending means, 252 Holding roller, 253 Holding roller, 256
Wire (interlocking rope), 262 outer flap bending means, 263 outer flap bending means, 266 guide rod, 267 guide rod, 268 outer flap correcting means, 269 outer flap correcting means, 273 rotating body,
274 rotating body, 281 pressure roller, 282 pressure roller, 291 tension coil spring, 292 tension coil spring, 296 pressure plate, 297 pressure plate, B packaging case transfer device, F packaging case length adjusting mechanism, G packaging case width Drive mechanism including adjustment mechanism, K flap folding device, K ₁ inner flap folding device, K ₂ outer flap folding device, L case body length, W case body width, H case body height.

Claims (4)

[Claims] 1. A mouth (3) of a tubular case body (2).
A packaging case transport device (B) for transporting a packaging case (1) provided with a flap (10) that can be folded along a folding line (11) in a direction orthogonal to the transport direction (P).
And an insertion portion bending means (235, 248) for bending the insertion portion (10a) at the tip of the flap (10) protruding from both the mouth portions (3) along the folding line (11a), and this flap (10). Flap folding means (26) for bending the () from the outside of the mouth (3) to the vicinity of the mouth (3).
2, 263) and a flap straightening means (268, 269) for sandwiching the flap (10) and the case body (2) on both sides of the fold line (11) of the flap (10) bent to the vicinity of both mouths (3). The flap correction means (268, 269) is provided with
Pressing members (281, 28) for press-contacting the flap (10)
2) and the case body (2) are in pressure contact with each other by a pressing member (29).
6 and 297) and the flap pressing member (28
1, 282) is provided with an elastic force, and a flap folding device for a packaging case. 2. The insertion portion bending means (235, 248) according to claim 1, wherein the recesses (239a, 25) are provided.
2a) having a holding member (239, 252), and a holding member (240, 2) having a convex portion (240a, 253a).
53) is provided, and the insertion portion (10a) of the flap (10) can be inserted between the concave portions (239a, 252a) and the convex portions (240a, 253a). Folding device. 3. The flap bending means (262, 263) according to claim 1, wherein the flap bending means (262, 263) is in contact with the flap (10) and bent toward the mouth (3) side in the conveying direction (P). A flap guide member (266, 2 that is inclined with respect to
67) and insertion part guide members (264, 265) that abut the insertion part (10a) of the flap (10) and guide it toward the mouth part (3) side. Flap folding device. 4. Both mouths (3) of a cylindrical case body (2)
A packaging case transport device (B) for transporting a packaging case (1) provided with a flap (10) that can be folded along a folding line (11) in a direction orthogonal to the transport direction (P).
And an insertion portion bending means (235, 248) for bending the insertion portion (10a) at the tip of the flap (10) protruding from both the mouth portions (3) along the folding line (11a), and this flap (10). Flap folding means (26) for bending the () from the outside of the mouth (3) to the vicinity of the mouth (3).
2, 263) and a flap straightening means (268, 269) for sandwiching the flap (10) and the case body (2) on both sides of the fold line (11) of the flap (10) bent to the vicinity of both mouths (3). And a support frame (20) that is supported on the machine frame (12) so as to be vertically movable.
In 7), the insertion portion bending means (248), the flap bending means (263), and the flap correction means (269) corresponding to one of the mouth portions (3) of the both mouth portions (3).
Are fixed on the support frame (207), and the insertion portion bending means (235), the flap bending means (262), and the flap correcting means (26) corresponding to the other mouth portion (3).
And 8) are installed on the movable frame (233), and the movable frame (2
33) the respective means (235, 262, 268) on the movable side (2) to the respective means (248, 263, 269) on the fixed side.
33) so that they can be moved toward and away from each other as they move, and in both of the insertion portion bending means (248, 235), a holding member (239, 252) having a concave portion (239a, 252a) and a convex portion, respectively. (240a, 253
The holding member (240, 253) having a) is attached to the movable body (250, 237), and both movable bodies (250,
237) are supported on the support frame (207) so that they can approach and separate from each other, and the interlocking rope (256) connected to the fixed-side movable body (250) is connected to the machine frame (12) side via the support frame (207). The movable body (2) connected to the movable frame (233) side
37) The interlocking rope (243) connected to the movable frame (233)
And a movable base plate (34) supported on the machine frame (12) side so as to move following the movable frame (233).