JPH039701A - Method for fitting snap on bag, and snap fitting device - Google Patents

Abstract

PURPOSE:To automatize work for fitting snaps on the opening edge sections of bags by a method wherein the bags on a loading table are taken out piece by piece to be carried and the opening sections of the bags are released to deliver the bags to bag retaining devices, and wherein the one side flap sections of the bags are folded inside the bags to fit male or female snaps on, and wherein the other side flap sections are folded inside the bags to fit the female or male snaps on. CONSTITUTION:On the upper section of a movable table 26, heaped-up bags W are mounted, and the bags W are taken out piece by piece with a bag feeder 8, and the opening sections Wb of the bags are released to carry the bags, and the bags are delivered to bag retaining devices 9. The bag retaining devices 9 are rotationally moved in the state of retaining the bags W, by rotary tables 13. By a first snap arranging device 10, the one side flap sections F1 of the bags W are folded inside the bags W, and on the folded sections, male or female type snaps 2(3) are fitted. Besides, by a second snap arranging device 11, the other side flap sections F2 of the bags W are folded inside the bags W, and on the folded sections, the female or male type snaps 3(2) are fitted.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for attaching a snap to the opening edge of a plastic bag used for packaging clothing, etc., for closing the opening of the bag, and a method thereof. It is related to the device.

[Conventional technology]

2. Description of the Related Art A pair of male and female snaps are attached to the edge of an opening of a plastic bag or the like used for packaging clothing or the like in order to close the opening. Conventionally, to attach these snaps, a worker manually takes out ready-made bags one by one, opens the opening, and uses a device or the like to tighten the snaps.

(Problems to be Solved by the Invention) However, the above-described conventional method for attaching snaps has the disadvantage that the work is complicated and the efficiency is low because the work of taking out the bags one by one is done manually. Also,
There is a problem in attaching snaps that it is dangerous for workers, and it has been desired to automate and save labor in the work of removing bags and attaching snaps. Conventionally, it was not possible to automate this series of operations because the bags are made of film.

SUMMARY OF THE INVENTION Therefore, in order to solve the problem described in F, it is an object of the present invention to provide a method and apparatus for attaching a snap to the opening edge of a ready-made bag without requiring manual labor by an operator.

[Means to solve the problem]

Next, means for achieving the above object will be explained with reference to FIGS. 1 to 16, which correspond to embodiments.

The method of attaching snaps to bags according to this invention is as follows:
4, take out one by one the many bags W stacked on top of each other, and
At the same time, the opening wb of the bag W is opened, and the bag W is transferred to the bag holding device 9. In this state, the bag W is transferred, and one flap part Fl of the bag W is bent inward of the bag W. Then, attach the male snap 2 or the female snap 3 to the bent part, then bend the other flap part F2 of the bag W inward, and attach the female snap 3 or the male snap 2 to the bent part. It is characterized by easy installation.

In addition, the snap attachment device 1 of the present invention includes a bag feeding device 8 that takes out a large number of bags W stacked on the loading table 24 one by one, and opens the opening wb of the bag W to carry it out.
a bag holding device 9 disposed on the periphery of a rotary table 13 that stops rotating at predetermined angles with respect to the base 12, holding the bags W supplied from the bag supplying device 8 in an open state and transporting them; One flap part Fl provided on the base 12 and formed protruding from a part of the opening edge of the bag W is bent inward of the bag W, and a male mold is attached to the bent part. Alternatively, a first snap arranging device 10 for attaching female snaps 2 and 3 and a first snap arranging device 10 provided on the base 12 and the bag W
The other flap part F2 protruding from the opening edge Wa facing the one flap part F1 is bent inward of the bag W, and a female or male snap 3 is attached to the bent part. Second snap placement device 11 for attaching 2
It is characterized by having the following.

(Function) The bag supply device 8 takes out a large number of bags W stacked on the loading table 24 one by one, opens the opening wb of the bags, transports them, and transfers them to the bag holding device 9 to hold zero bags. The packaging W19 is rotated by the rotary table 13 while holding one bag W.

Then, one flap part F1 of the bag W is bent inward of the bag W by the first snap placement device 10, and a male or female type snap 2 (3) is attached to the bent part. Also, the second snap placement device 11 allows the bag W to be
The other flap portion F2 is bent inward of the bag W, and a female or male snap 3(2) is attached to the bent portion.

(Embodiment) FIG. 1 is a plan view showing an embodiment of a snap mounting device according to the present invention, and FIG. 2 is a cross-sectional side view of the snap mounting device according to the same embodiment.

First, in this snap attachment, the bag W as the workpiece handled by the device 1 is a ready-made bag having a substantially rectangular shape as shown in FIG.
A pair is formed.

The snaps attached to this bag W are a pair of male and female clasps, and as shown in Figure 4, the male snap 2 is
Convex member 4 having spring properties and having a mounting hole 4a formed in the center
As shown in FIG. 5, the female snap 3 includes a concave member 6 with a mounting hole 6a formed in the center, and a mounting member 5 with a protrusion 5a formed in the center. 7a and a head member 7 formed therein. As shown in FIG. 6, this snap attachment device 1 attaches each snap 2.3 to each flap portion Fl, F2 of the bag W, and creates a closing flap that can close the opening wb of the bag W. F is manufactured into a molded bag.

Next, the configuration of the snap attachment device 1 of the present invention will be explained.

This snap attachment device 1 includes a bag feeding device 8, a bag holding device 9, and first and second snap placement devices 10.11.
It is roughly composed of.

First, the bag feeding device 8 is located on the left side in FIGS. 1 and 2, and is a device that feeds bags W stacked on a loading table one by one to a bag holding device 9, which will be described later.

As shown in FIG. 8, this bag supply device 8 is provided on the top of a substantially rectangular base frame. A pair of parallel side plates 21, 21 are vertically provided on the base frame 20.

A substantially rectangular window portion 22 is formed in the center of each of the side plates 21, 21. Support brackets 23 are provided at the lower edges of each of the window portions 22 and extend outward from each other. A loading platform 24 is provided passing through these window portions 22.

This loading table 24 includes a fixed table 25 and a movable table 2.
6, and stacked bags W are placed on the upper surface of the movable table 26.

The fixed table 25 has both ends connected to each window portion 2 of the both side plates 21.
2 and is fixed to each support bracket 23. As shown in FIG. 7, two mutually parallel guide shafts 27, 27 are horizontally fixed to the upper surface of the fixed table 25. As shown in FIG. In addition, a rodless cylinder 28 is provided between the guide shafts 27 and parallel to the guide shafts 27 on the upper surface of the fixed table 25 . A movable table 26 is provided on the guide shaft 27 via a bearing 29 so as to be movable on the fixed table 25, and a movable portion 28a of the rodless cylinder 28 is fixed to the back surface of the 6I movable table 26. ing. That is, by operating the rodless cylinder 28, it is possible to move on the movable table 26 or the fixed table 25 in the lateral direction with respect to the base frame 20 using the guide shaft 27 as a guide.

Next, as shown in FIG. 8, each inner surface 21a of the both side plates 21 is
, sprockets 30 facing each other are provided close to the four corners of each window 22. A pair of sprockets 30a at the lower rear of these sprockets 30 (bottom left in FIG. 8) are provided on a driven wheel 31 that is horizontally spanned between both side plates 21, and sprockets 30 other than this sprocket 30a are attached to each side plate. 21 via a shaft 32 so as to be rotatable. A driven sprocket 33 is provided in the middle of the driven shaft 31 . This driven sprocket 33 is interlocked and connected by a chain 36 to a drive sprocket 35 of a drive motor 34 which is fixed to the lower surface of the fixed table 25 of the loading platform 24 .

Sprockets 30 and 30 arranged on these side plates 21
A pair of chains 37 are stretched along the periphery of the window portion 22 of each side plate 21, respectively. A separation plate 38 is provided across the chain between these chains 37. In other words, the separation plate 38 can be moved around the loading table 24 by the operation of the drive motor 34 .

In addition, between the both side plates 21 located near the upper edge of each window 22 of the both side plates 21 and on the inner periphery of each chain 37, there is an a placement plate 39.
However, the rack is provided.

Next, first guide shafts 40 are provided horizontally on the inner surfaces 21a of the upper edges of the side plates 21 so as to be parallel to each other. Each of the pair of first guide shafts 40 is provided with a bearing 41 that allows the guide shaft 40 to slide. Between each bearing 41,
A vertical support plate 42 spans the rack, and both sides of the support plate 42 are fixed to bearings 41. In other words, the position of the support plate 42 can be moved according to the length of the bag W. Near both ends of this support plate 42,
A mounting plate 43 is provided to extend horizontally. The attachment positions of these attachment plates 43 relative to the support plate 42 can be changed according to the width of the bag W. These mounting plates 43
Lifting cylinders CYI are provided one on top of the other on the upper surface. This lifting cylinder CYI is attached such that a piston rod extends and contracts downward through the attachment plate 43. At the tip of the piston rod,
A rectangular suction portion 44 is provided. A plurality of vacuum pads 44a are provided on the lower surface of the blow-up portion 44, and are connected to a vacuum ejector (not shown).

Next, in front of the upper edge of both side plates 21 (upper part in FIG. 7),
A fixed plate 45 is provided across the frame between each side plate. This fixing plate 45 has a cross-sectional shape of a vertical portion 45a and a horizontal portion 45b, and both ends of the horizontal portion 45b are fixed to the upper edges of both sides h21. Also, the vertical part 4
A first feed cylinder CY2 and a second feed cylinder CY2 are located approximately in the center of 5a.
The feed cylinder CY3 is installed horizontally.

In the first feed cylinder CY2, the cylinder head is fixed to the 01 vertical part 45a, and the piston rod is fixed to the vertical part 45a.
It is designed to expand and contract in the rearward direction (to the left in FIG. 8) from point a. Further, the second feed cylinder CY3 is fixed to the vertical portion 45a of the fixed plate 45 adjacent to the first feed cylinder CY2, and the piston rod is attached to the vertical portion 45a of the fixed plate 45.
It is designed to expand and contract more toward the bait (to the right in Figure 8) than a.

In addition, on each opposing inner surface 21a of the upper edge of each side plate 21,
Similar to the first guide shaft 4° described above, a pair of second guide shafts 46 are provided horizontally. These second guide shafts 46 are fixed to both side plates 21 by fixing brackets 47 at both ends and a middle part, and the guide shafts 46 are fixed to Mt with the fixing bracket 47a in the middle part as a boundary.
It is designed to be divided into j&. Slidable bearings 48 are respectively provided in the rear half portions 46a of the second guide shafts 46 on the first guide shaft 40 side from the intermediate portion fixing bracket 47a. These, bearing 4
A movable plate 49 is installed between 8 and 48. Mounting plates 50 are attached to extend horizontally near both ends of the movable plate 49. These mounting plates 50 can be mounted and moved relative to the movable plate 49 according to the width of the bag W. An intermediate lifting cylinder CY4 is vertically provided on the upper surface of each mounting plate 50. The intermediate lifting cylinder CY4 has a piston rod that extends and contracts downward through the mounting plate 50, similar to the aforementioned lifting cylinder CYI. A substantially rectangular suction portion 51 is provided at the tip of the piston rod, and a plurality of vacuum pads 51a connected to a vacuum ejector (not shown) are provided on the lower surface of the suction portion 51. Further, the intermediate portion of the moving plate 49 is connected to the tip of the piston rod of the first feed cylinder CY2 described above.

That is, by the operation of the first feed cylinder CY2, the movable plate 4 to which the intermediate portion lifting cylinder CY4 is attached is moved.
9 is adapted to move horizontally using the second guide shaft 46 as a guide.

On the other hand, the rear half portion 46a of the second guide shaft 46 is attached to the rear half portion 46b on the front side (right side in FIG. 8) of the intermediate portion fixing bracket 47a of the second guide shaft 46.
Similarly, bearings 52 are provided so as to be slidable. A moving frame 53 is installed over these bearings 52 .

The moving frame 53 is formed into a substantially square shape, and both ends of its upper edge are fixed to the bearings 52. Mounting plates 54 are attached to the upper edge of the moving frame 53, extending horizontally near both ends, similar to the moving plate 49 described above. A first bag opening cylinder C is provided on the upper surface of these mounting plates 54.
Y5 are each provided vertically. These first bag opening cylinders CY5 have a piston rod that expands and contracts downward, and a substantially rectangular suction portion is provided at the tip of the piston rod. A vacuum pad 55a connected to a vacuum ejector (not shown) is provided on the lower surface of the suction portion 55.
There are multiple locations. Moreover, at the lower edge of the moving frame 53,
Similar to the first bag opening cylinder CY5 described above, a second bag opening cylinder CY6 is provided vertically via a mounting plate 54. These 1g2 bag opening cylinders CY6 are attached so that their piston rods expand and contract upward, and the vacuum pad 55a disposed on the suction part 55 at the tip of the piston loft is the vacuum pad 55a of the first bag opening cylinder CY5. They are now facing each other.

Further, a substantially middle portion of the upper edge of the moving frame 53 is connected to the tip of the piston rod of the second feed cylinder CY3 described above. That is, by the operation of the second feed cylinder CY3, the moving frame 53 moves horizontally using the second guide shaft 46 as a guide, and the first and second bag opening cylinders CY5. CY6 is designed to expand and contract at the same time.

Therefore, according to the bag supply device 8 as described above, the loading platform 2
The bags W placed on the bag W can be taken out one by one and transported to the next process device while opening the opening wb of the bag W.

Next, 5, a bag holding device 9 and first and second snap placement devices 10 and 11 are respectively provided adjacent to the front side (right side in FIGS. 1 and 2) of the bag supply device 8. The base 12 will be explained.

The base 12 is formed into a substantially cylindrical shape with an open top, and as shown in FIG. 2, has a drive section 60, a power transmission section 62, and a lift cylinder CY7. CY8 is provided.

The drive unit 60 has a built-in drive motor and the like, and is configured to output a predetermined number of rotations. A driving pulley 61 provided on the output wheel of the drive unit 60 is interlocked and connected to a driven pulley 63 of the power transmission unit 62 by a belt 64.
power is transmitted to this power transmission section 62.

This power transmission section 62 is composed of a speed reducer, a clutch, a brake, etc., and transmits the rotation from the drive section 60 to a horizontally rotating drive pool 65 provided at the upper end.
The rotation of this drive pulley 65 is stopped every degree.

Also, lift cylinder CY7. CY8 is located near the bottom periphery of the base 12, and is connected to 1g2 and the fourth station S, which will be described later.
2. They are each provided vertically at a position corresponding to S4.

Further, a support column 66 is provided vertically at the center of the bottom of the base 12. The support column 66 has a cylindrical shape with a large diameter in the middle, and is fixed with a key so as not to rotate relative to the base 12.

A rotary table 13 is rotatably attached to a midway portion of the support column 66. This rotary table 13 is composed of a table portion 13a formed in a substantially donut shape and a rotary support portion 13b. The rotation support portion 13b is formed in a cylindrical shape and is attached to the midway portion of the support column 66 via a bearing. A plurality of rib plates 13c are provided radially on the outer peripheral surface of the rotation support portion 13b. Each tip of the plurality of rib plates 13c extends near the opening periphery of the base 12, and a table portion 13a is fixed to the tip. The table portion 13a has an outer diameter substantially concave than the outer diameter of the base 12, and is configured to cover the peripheral edge of the opening of the base 12. Further, a pulley 68 formed in the shape of a flange is provided at the lower end of the rotation support portion 13b.

The drive pulley 65 of the power transmission section 62 described above is interlocked with the endless belt 67.

Therefore, this rotary table 13 is rotated by the drive section 60 described above, and also rotated by the power transmission section 62.
“It rotates in stages each time.

Further, the upper end of the support column 66 projects upward from the opening of the base 12, and a substantially disc-shaped fixed table 14 is provided at this upper end. This fixed table 14 is
The outer diameter is set to be slightly larger than the inner diameter of the table portion 13a of the rotary table 13. This fixed table 1
As shown in FIG.
The fixed table 14, which is divided into six equal parts, is divided clockwise into equal divisions of 60" based on the peripheral edge adjacent to the bag feeding device 8. The section is divided into a first station S1, a second station S2, a third station S3, and so on clockwise.
Fourth station S4. i5 station S5. The sixth station is set as S6.

Next, the configuration of the bag holding device 9 disposed on the rotary table 13 of the base 12 will be explained.

As shown in the schematic plan view of FIG. 9, this bag holding device 9 is mounted on the table portion 13a of the five-turn table 13 at regular intervals of 60° to correspond to the stations S1 to S6 set on the fixed table 14. Six units are arranged at intervals, and the bag W is supplied from the bag supply device 8 described above at the first station S1.
Bags W are then delivered to each station S2 to S6 in sequence.
This is a device that transports objects while holding them.

This bag holding device M9 is composed of a generally U-shaped lifting rail 70 with an open top and a hand portion 74 attached to this lifting rail 70. As shown in FIG. 12, a pair of vertically extending vertically extending guide shafts 71 are provided on the back surface of the vertically moving rail 70 and are parallel to each other. These elevating guide shafts 71 are connected to the table portion 13a of the rotary table 13.
It is slidably attached through a pair of bearings 72 provided in the. Further, a bracket 73 having a cross-sectional shape is provided at the lower end of each of the lift guide shafts 71, and the second and fourth stations S2. Lift cylinder CY7 in the base 12 mentioned above in S4. It comes into contact with the tip of the rod of CY8.

Next, the hand portions 74 are configured in left and right pairs, and are provided near both ends of the elevating rail 70. Here, since each hand section 74 has a bilaterally symmetrical shape, one hand section 74 will be explained.

First, the hand part 74 has a movable base part 75 slidably attached to the lifting rail 70, so that it can be fixed at a position corresponding to the opening width of the bag.

The movable base 75 is formed into a substantially prismatic shape, and has a flange-like sliding contact portion 76 formed at the bottom thereof, and this sliding contact portion 76 is adapted to fit into the lifting rail 70. The movable base 75 is provided with a rising support plate 77 extending horizontally from its upper end surface. Moreover, on the side of this movable base 75, there are two
Book guide shafts 78 are fixed at one end of each in parallel to each other. A vertically long regulating plate 79 is fixed to the other end portions of both guide shafts 78,78. Both guide shafts 78.
A linear solenoid 80 is provided in the movable base 75 in parallel with the guide shaft 78 via a support bracket 81 in the middle of the guide shaft 78 . A coil spring 82 is wound around the guide shaft 78, and an arm 84 is slidably provided via a bearing 83. Fixed. Therefore, when the direct-acting solenoid 80 is energized, the movable core 80a retracts, and the arm 84 moves toward both guide shafts 78.
When the direct-acting solenoid 80 is not energized, the arm 84 comes into contact with the regulating plate 79 due to the bias of the coil spring 82.

Next, as shown in FIG. 11, the arm 84 is formed in an abbreviated shape with an upper portion extending forward. A rotary solenoid 86 is provided on one side of the extended tip 84a via a bracket 85. The rotation shaft 86a of this rotary solenoid 86 is connected to the arm tip 84a.
It penetrates horizontally and protrudes from the other side. A bag holding piece 87 is attached to the tip of the protruding rotating shaft 86a. The bag holding piece 87 has an L-shaped bent end. The tip portion 87a is formed in the shape of a semicircular claw, and is adapted to hold the opening edge Wa of the bag W from inside.

Further, a protrusion 87b is formed at the base end of the bag holding piece 87 in a direction opposite to the bending direction of the tip end 87a, and a stopper 84b is provided to protrude from the other side of the arm tip 84a.
It is designed to come into contact with the In other words, the bag holding piece 8
7, the protrusion 8 is activated by energizing the rotary solenoid 86.
7b and the stop bar 84a rotate until they come into contact with each other.

According to the bag holding device 9 as described above, the pair of hand portions 7
4. Reduce the distance between each arm 84 of 74, and each bag holding piece 8
7.87 facing the ml direction, the bag W can be received from the bag holding device 8, and the distance between the arms 84 and 84 can be widened to hold the bag W.

Next, the configuration of the if snap placement device 1o that is placed on the fixed table 14 of the base 12 will be explained.

As shown in FIG. 1, FIG. 2, and FIG. One flap part F1 of the bag W held in the bag W
This is a device that bends the entire body inward and attaches the male snap 2 to the bent portion.

As shown in FIGS. 13 and 14, a span adjustment section 90 constituting the base of the first snap placement device 10 is fixed on the fixed table 14 of the base 12. As shown in FIGS. In the span adjustment section 90, a pair of fixed plates 91 that are parallel to each other are vertically provided on the fixed table 14. These fixed plates 91
are formed into a rectangular shape, and mounting holes are provided at each of the four corners facing each other. Four guide shafts 92 are fixed at both ends of each of the fixing plates 91 in parallel to each other in each mounting hole. A drive shaft 93 is provided at the center of these guide shafts 92 and parallel to the guide shafts 92 . The drive shaft 93 has a right-handed screw thread on one end of the intermediate portion, and a left-handed screw thread on the other end. Both ends of this drive shaft 93 are supported by bearings 94 provided on both rotation plates 91, and furthermore, one of the fixed plates 91
One end portion of all protrudes outward from the fixed plate 91a. One end of this protruding drive shaft 93 is attached to the other fixed plate 91.
It is connected to a drive motor 96 provided via a bracket 95 on the outside of a. Then, the guide shaft 92
A pair of movable plates 97 are slidably provided via bearings 98, and the drive shaft 93 is engaged with a nut portion 99 fixed at the center of each movable plate 97. Therefore, by driving the drive motor 96 and rotating the drive shaft 93, each movable plate 97 moves along each guide shaft 92, and
Since the threading direction of the drive shaft 93 is reversed from the middle of the drive shaft 93, each movable plate 97 can be moved simultaneously so as to always maintain the same distance from the center. The distance between both rotating plates 97 and 97 can be set arbitrarily.

Next, as shown in FIG. 14, each movable navigation plate 97 has
A vertically long connecting plate 100 is fixed to each front end surface. Each of these connecting plates 100 has a snap mounting portion 10.
1 is permanently installed. Here, these snap attachments will be described in detail in section 101;
As shown in FIG. 13, these are formed symmetrically, so only one snap attachment section will be explained.

As shown in FIG. 14, this snap attachment part 101 has a vertically long base plate 102 that forms the base of the connecting plate 1.
00, and is provided so as to extend so as to face the top of the rotary table 13 of the base 12. As shown in FIG. 13, a substantially rectangular plate-shaped block 103 is vertically provided approximately at the center of the substrate 102. As shown in FIG. This block 103
A die portion 104 extending vertically is formed integrally with this block 103 at the front of the lower edge thereof.

This die portion 104 is located above the bag holding device 9 described above.

A groove-shaped guide rail portion 105 is formed in the blood storage portion of the die portion 104 so as to be continuous with the end surface of the block 10 . This guide rail part 105 is used for snap mounting the mounting member 5 of the male snap 2 from above the die part!
It is designed to lead to the tip of 04. A verification mechanism (not shown) is provided at the tip of the die portion 104, and is configured to temporarily hold the mounting member 5 guided by the guide rail portion 105.

A pair of horizontally elongated frame plates 106 extending forward are provided on both sides of the block 103 in parallel with each other. At the lower edges of these frame plates 106, notches 106a are formed at midpoints on the base end side, so that the die portions 104 protrude below the frame plates 106. Further, continuous to this notch 106a,
A rectangular protrusion 106b is formed in the middle of each lower edge of the frame plate 106, and a mounting block 107 having an insertion hole is interposed between each protrusion 106b.

Between each frame plate 106, a guide rail 108 is provided vertically adjacent to the guide rail portion 105 of the block 103.
is provided. This guide rail 108 has a groove-shaped guide portion 108a formed on its vertical surface to guide the convex member 4 of the male snap 2 downward. Further, the lower end of this guide rail 108 protrudes below the frame plate 106 similarly to the die portion 104.

Furthermore, a vertically long mounting bracket 109 is provided on each end surface of each frame plate 106 to connect and fix each frame plate. A cylinder CY9 is attached to the lower part of the mounting bracket 109. In this driving, the piston rod of the cylinder CY9 passes through the mounting bracket 109 and expands and contracts horizontally. A proximal end of a hammer rod 110 is connected to the distal end of the piston rod,
The hammer rod 110 is slidably inserted into the insertion hole of the mounting block 107 that has been moved. hammer rod 1
The tip of 10 passes through the continuous mounting block 107, and a ramming part 111 is provided at the end thereof. This hammering is part 11
1 is located at the lower end of the guide rail 108 and is adapted to temporarily hold the convex member 4 guided by the guide rail 108. And this hit is part! 11
In this case, while holding the convex member 4, the striking is performed on the cylinder C.
Y9 impacts the mounting member 5 held by the aforementioned die portion 104, fitting each member 4.5, and crimping and fixing the protrusion 5a of the mounting member 5.

Further, below the guide rail 108 and the die section 104, an air blowing section 112 is provided as shown in FIG. This air blowout section 112 has a horizontal blowout port 112a.
and a vertical blow-off port 112b, and one flap part Fl of the bag W is formed to be bent by air pressure.

Furthermore, one outer surface 106c of the frame plate 106
A guide claw 113 is provided vertically. The guide claw 113 has a wedge-shaped tip and is adapted to bend the flap portion F1 of the bag W.

Next, a support bracket 114 is provided on the outer surface of the other frame plate 106d. This support bracket 114 supports the hopper device 15. As shown in FIG. 1 and FIG. 2, two hopper devices 15 are installed in parallel on the upper part of the frame board 106, and each member 4.5 of the male snap 2 is aligned in the same direction, and the guide rail 108 and the guide rail section 105. In addition, these hopper devices 15 are provided with each member 4.5 at the same time, one each on each rail 105, 10.
8.

Therefore, this first snap placement device 10 is...

One flap part F1 of the bag W held by the bag holding device 9 is bent inward of the bag W using air pressure and the guide claw 113, and the male snap 2 is attached to the bent part using the cylinder CY9. It is designed to be installed by impact.

Next, the configuration of the second snap placement device 11 will be explained.

This second snap placement device 11 is shown in FIG.

As shown in FIGS. 2 and 9, the other flap part F2 of the five bags W is folded inward in the middle of the bag W, which is located at the fourth station S4 on the fixed table 14 mentioned above,
This is a device for attaching a female snap 3 to the bent portion.

This second snap placement device 11 is shown in FIG.
As shown in Figure 6, it is composed of a span j1 adjustment section, a snap attachment section, a hopper device, and a flap bending section. The components of this second snap placement device jllll are almost the same as those of the first snap placement device 10 described above, and only the flap bending portion 120 is different, so the same parts are given the same numbers and explanations will be omitted. do.

As shown in FIG. 15 and the first diagram, the flap bending portion 120 is formed by attaching the support frame 12 to the outer surface of the other frame plate 106d.
1 is provided protrudingly. The support frame 121 is formed into a substantially U-shape with a pair of horizontal mounting plates 121a at the top and bottom, and a vertical side wall plate 121b spanning these mounting plates 121a. A pair of mutually parallel guide rods 122 are vertically provided between each mounting plate 121a of this support frame 121. Furthermore, a through hole is formed approximately at the center of the lower mounting plate 121a. A slider 123 is slidably provided on each guide rod 122 via a bearing. The slider 123 has a substantially rectangular shape and has a guide pin 124 extending vertically installed in a substantially central portion of the bottom surface. The guide bin 124 passes through a through hole in the lower mounting plate 121a and projects downward from the lower mounting plate 121a. The tip of the guide bin 124 comes into contact with the rising support plate 77 of the bag holding device 9 described above.

A bracket 125 having a tip extending forward is fixed to the side surface of the slider 123. This bracket! At the tip of 25, a tension cylinder CYIO that expands and contracts in the horizontal direction is provided.

Further, a pair of extending pieces are formed at the tip of the slider 123, and are formed in a substantially U-shape.

Between these extending pieces, an arm 126 whose tip is bent downward into an L-shape is rotatably connected by a pin 127. A connecting piece 128 is provided in a protruding manner in the middle of one side of the arm 126 . And, it is connected to the piston rod of the above-mentioned tension cylinder cyto. Further, a hand portion 129 is provided at the tip of the arm 126 so as to face downward.

This hand portion 129 has a pair of clamping claws 130 and 131, as shown in FIG. One of the clamping claws 130 has a semicircular curved part 130a formed on the inner surface of the tip,
A flat portion 130b is formed at the tip. Further, the other clamping claw 131 has a clamping surface 131a that comes into contact with the flat part 130b at the tip of the one clamping claw 130, and a bent part 131b facing one end of the curved part 131a is formed.

Therefore, this flap bending part 120 bends the other flap part F2 of the bag W in the middle by the pair of clamping claws 130 and 131, as shown in FIG. Pull the bag W,
The fold of the flap part F2 is strengthened, and the bag holding device a1 is
9 is raised, the flap part F2 of the bag W is simultaneously raised in a bent state.

Next, the operation of the snap attachment W1 consisting of each device configured as described above will be explained.

First, the bags W placed a on the loading table 24 of the bag supply device 8
As shown in FIG. 17, the rod of the lifting cylinder CY1 extends, and the closed end side of the bag W is held by the suction of the vacuum pad 44a.

Next, the rod of the lifting cylinder CYI retracts and lifts the bag W. After the lift stops, the drive motor 34 rotates and the chain 37 rotates to release the separation plate 3.
8 moves as shown in FIG.
It is separated and placed on the mounting plate 39.

When the separation plate 38 passes the mounting plate 39, the 19th
As shown in the figure, the rod of the intermediate lifting cylinder CY4 extends and presses the bag W. At this time, the lifting cylinder C
YI releases the suction holding of the bag W, and the closed end of the bag W separates.

The intermediate lifting cylinder CY4 holds one bag W by suction, lifts the bag W as shown in FIG. 20, and moves the bag W to the bag opening cylinder CY5 by retracting the rod of the first feed cylinder CY2. Have it transported.

and the first and second bag opening cylinders CY5. CY6
At the same time, the rod is extended and both sides of the opening wb of the bag W are held under suction as shown in FIG. At this time,
The intermediate lifting cylinder CY4 stops sucking and holding the bag W and returns to the initial setting position.

Next, the rod of the second feed cylinder CY3 is extended, and the rods of each bag opening cylinder CY5 and CY6 are simultaneously retracted to open the opening wb of one bag W in the vertical direction, as shown in FIG. Then, the bag is transferred to the bag holding device 9.

At this time, the bag holding device 9 operates the linear solenoid 80 and the rotary solenoid 86 to shorten the distance between both arms 84 as shown by the two-dot chain line in FIG. The side facing the supply device 8 is waiting for the bag W to be delivered.

Bag release cylinder CY5. When the opening wb of the bag W is conveyed around the bag holding piece 87 by CY6, the direct-acting solenoid 80 is actuated, and the space between the two arms 84 is widened, and both ends of the bag W are held in an open state. At the same time, the bag opening cylinder C
Y5. CY6 releases the suction holding of the bag W. Then, the rotary solenoid 86 is activated to direct the opening wb of the bag W upward. At this time, although not shown, air is blown from above the bag holding device 8, so that if the bag W cannot be delivered accurately, the bag W is dropped downward.

Next, the rotary table 13 rotates 60 degrees, stops at the second station S2, and the bag holding device 9 moves below the first snap placement device 10.

In the first snap placement device 10, first, as shown in FIG.
is blown out from each outlet 112a, 112b, and the pressure of the air bends one flap part F1 of the bag W inward.

Next, the bag holding device 9 is lifted from the rotary table 13 by the lift cylinder CY7. At this time, the presence or absence of the bag is detected by an optical sensor (not shown). If there is no bag, the operation of attaching the male snap 2, which will be described later, will not be performed.

Then, at the same time as it rises, one flap part F1 is bent inward of the bag W by the guide claw 113, as shown in Figure 1g24.

When the lift cylinder CY7 stops rising, the cylinder CY9 is actuated to attach the male snap 2 to the bent portion of the bag W.

After the male snap 2 is attached, the lift cylinder CY7 retracts the rod and lowers the bag holding device 9. At this time, a sensor 5 (not shown) detects whether the snap 2 is attached to the bag W.

When the bag holding device 9 returns to the rotary table I3, the rotary table 13 rotates 601 times and stops at the third station S3.

The rotary table 13 further rotates by 60 degrees and stops at the fourth station S4, that is, the bag holding device 9 is moved below the second snap placement device 11.

Here, if the first snap placement device 10 detects that the bag W is not held, the second snap placement device 11 does not operate and waits until the next step.

In the second snap placement device 11, air (arrow B in the figure) is blown out from the lower side of the base 12 from an outlet (not shown), and the other flap part F2 of the bag W is roughly shaped as shown in FIG. stand vertically.

Next, the clamping claws 130° and 131 of the flap bending part 120 clamp the other flap part F2 and simultaneously bend it halfway, as shown in FIG.

The tension cylinder cy of this flap bent portion 120
As shown in FIG. 28, the other flap portion F2 is pulled toward both ends, thereby strengthening the folding of the cut portion.

Next, as shown in FIG. 27, the bag holding device 9 is raised by the lift cylinder CY8 in the above-described state. At this time, the flap bending part 120 is raised by the guide pin 124 at the same time as the bag holding device 9, and the other flap part F2 is bent by the guide claw 113. Also, when rising, 1
The presence or absence of the bag W is detected by an optical sensor (not shown).

If there is no bag W, the operation of attaching the female snap 3, which will be described later, is omitted.

When the lift cylinder CY8 stops rising, the striking cylinder CY9 operates, and the female snap 3 is attached to the bent portion of the bag W in the same manner as the male snap 2 described above.

After the female snap 3 is attached, the snap bending portion 120 releases the bag W and is lowered together with the bag holding device 9 by the retraction of the rod of the lift cylinder CY8. At this time,
A sensor (not shown) detects whether the female snap 3 is attached to the bag W.

When the bag holding device 9 returns onto the rotary table 13, the rotary table 13 rotates by 60 degrees and stops at the fifth station S5.

In this fifth station S5, each snap 2 described above
．． A direct-acting solenoid 80 of the bag holding device 9 is activated by a sensor that detects whether or not the bag holding device 3 is attached. That is, the second and fourth stations S2. S4
When the sensor detects a location where the snap 2.3 is not attached to the bag W, the fifth station S5 determines that the bag W is a defective product and activates the direct-acting solenoid 80.
The bag holding device 9 releases the holding of the bag W and allows the bag W to fall.

Next, the rotary table 13 rotates 60 degrees and stops at the sixth station S6.

At this sixth station S6, the bag that has passed through the fifth station S5, that is, the finished bag W as shown in FIG. 6, is dropped by releasing the bag holding device 9.

Further, the rotary table 13 rotates by 60 degrees and stops at the first station S1 where bags are delivered from the bag supply device 8 mentioned above.

Note that the other bag holding devices 9 on the rotary table 13 perform each operation in sequence in the same manner.

〔Effect of the invention〕

As explained above, according to the method and apparatus for attaching snaps to bags according to the present invention, the conventional manual attachment of snaps to bags by workers can be automated, so the same This has the effect of improving work efficiency in work, as well as saving labor and reducing work costs.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of the snap mounting device according to the present invention, Fig. 2 is a partially cutaway side view of the snap mounting device according to the same embodiment, and Fig. 3 is a plan view showing an embodiment of the snap mounting device according to the present invention. Fig. 4 is a perspective view of a male snap, Fig. 5 is a perspective view of a female snap, Fig. 6 is a schematic side view showing each snap attached to the bag, Fig. 7 The figures are a plan view of the bag feeding device, FIG. 8 is a sectional view taken along the line ■-■ in FIG. 7, FIG. The figure is a side view of the same bag holding device, FIG.
Figure 3 is a partially omitted plan view of the first snap placement device;
Fig. 4 is a partially omitted side view of the first snap placing device, Fig. 15 is a partially omitted plan view of the second snap placing device, and Fig. 16 is a partially omitted side view of the second snap placing device. Side view with parts omitted,
Figures 17 to 22 are explanatory diagrams of the operation of the bag feeding device;
3 and 24 are explanatory diagrams of the operation of folding one flap portion of the bag, and FIGS. 25 to 28 are explanatory diagrams of the operation of folding of the other flap portion. 1...Snap installation is a device. 2...male snap, 3°・°female snap 8
...Bag feeding device, 9...Bag holding device. 10.-First snap placement device. 11--Second snap placement device. 12.-base, 13-rotary table. 24-81 company stand. F 1--One flap part. F2---Other flap part. W...bag, Wa-opening edge. w b-...opening.

Claims (1)

[Claims] 1) Take out a large number of bags stacked on a loading table one by one,
While transporting the bag, opening the opening of the bag,
Transfer the bag to the bag holding device, transfer the bag in that state, bend one flap part of the bag inward, attach a male snap or female snap to the bent part, and then attach the other flap part of the bag to the inside of the bag. A method for attaching snaps to bags, comprising: bending the flap part of the bag inward, and attaching a female snap or male snap to the folded part. 2) A bag supply device that takes out a large number of bags stacked on a loading table one by one, opens the opening of the bag, and carries it out; and a rotary table that stops rotating at predetermined angles with respect to the base. a bag holding device disposed on the periphery to hold and transfer the bags supplied from the bag supply device in an open state; and a bag holding device disposed on the base and formed to protrude from a part of the opening edge of the bag. a first snap placement device that bends one flap portion inward of the bag and attaches a male or female snap to the bent portion; A second snap arrangement in which the other flap part protrudingly formed on the opening edge opposite to the flap part is bent inward of the bag, and a female or male snap is attached to the bent part. A snap attachment device comprising: