JP2893442B2 - Fastener welding device and method for welding in bag making machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastener welding apparatus and method for a bag making machine for continuously welding a fastener to an opening of a bag.

[0002]

2. Description of the Related Art In a conventional bag making machine, a bag material is continuously processed to form a bag, and finally, in a separate step, a fastener is manually attached to an opening portion by bonding or sewing.

[0003]

In the above-described bag making machine, the process of attaching the fastener is a manual operation, so that the production efficiency is low and the productivity cannot be improved.

[0004] The present invention has been made in view of the above circumstances, and an object thereof is to provide a process of attaching a fastener to a bag,
It is an object of the present invention to provide a fastener welding apparatus and a welding method for a bag making machine which can be mechanically and continuously performed and can significantly improve productivity.

[0005]

According to a first aspect of the present invention, there is provided a fastener welding apparatus for a bag making machine, wherein a plurality of fasteners for engaging and disengaging two adjacently arranged strips with engaging teeth are provided at predetermined intervals. A supply unit that supplies a group of connected fasteners,
A first chuck that is provided so as to be reciprocally movable and grips the tip of the fastener group and pulls out to a predetermined position; A second chuck, a feed roller for feeding the remaining portion of the fastener held by the second chuck forward, a cutting unit for detecting the end of the extracted fastener and separating the fastener, and a second chuck A feeding roller for sandwiching the fastener transferred by the above to make the band of the fastener follow the opening of the bag material, and a welding portion for welding the band of the fastener to the edge of the opening of the bag material. It has features in other places.

According to a second aspect of the present invention, the edges of the pair of bag materials are
In the welded bag, with respect to one of the pair of bag materials,
A step of forming an opening by cutting off an intermediate predetermined width dimension,
A step of pulling out the tip of a group of fasteners in which a number of fasteners are connected at predetermined intervals and separating one fastener from the group of fasteners;
Is supplied along the opening of the bag material.
Ultrasonic welding on the edge of the bag material with a fastener
And a connecting step .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A bag 1 manufactured by the present invention is formed by molding a bag material 2 as shown in FIGS. 2 and 3, a gusset portion 3 (returned portion) is formed at the bottom, and an upper end is formed. A handle 4 is formed in the portion. The side part 5 is welded to form a bag, and a fastener 11 is attached to an edge of the opening 6.

As shown in FIG. 4, the fastener 11 connects two belts 12 with engaging teeth 13, and slides a slider 14 to engage the engaging teeth 13.
Are engaged to close the opening 6 or to disengage and
The opening 6 is opened. In addition, stoppers 15 are fixed to both ends of the engaging teeth 13 to couple the belts 12 on both sides inseparably. The fastener group 16 uses a long strip 12 and connects a large number of fasteners 11 at a constant interval A dimension. Slits 11 a are formed between the front and rear fasteners 11, that is, between the stoppers 15, between the strips 12.

An embodiment of the present invention will now be described with reference to FIGS.
This will be described with reference to FIG. First, in FIGS. 1 and 5,
The supply unit 20 includes a stocker unit 21 that is disposed at a distal end and stores the fastener group 16, a plurality of rollers 22 that are arranged in a zigzag shape, and a guide unit 23 that holds the fastener 11 horizontally. . The guide portion 23 has a hollow recess 23a corresponding to the engagement teeth 13 and the slider 14, through which the fastener 11 passes.

As shown in FIG. 6, the first chuck 31 pivots the two arms 32, 32 up and down.
1 is gripped. The first chuck 31 is moved by the air cylinder 31a between the front portion of the guide portion 23 and the extraction position 3.
3 is provided so as to be able to reciprocate. Note that the first chuck 31 may be driven by an electric cylinder, a servomotor, or the like.

As shown in FIG. 7, the second chuck 34 pivots the two arms 35, 35 up and down, and the contact surfaces of the arms 35, 35 are V-shaped. ,
The intermediate part of the fastener 11 is gripped, and the fastener 11 is formed into a substantially U-shape, whereby the tip part is held horizontally. Like the first chuck 31, the second chuck 34 is provided so as to be able to reciprocate by an air cylinder 34a, and is always upstream from the extraction position 33 (FIG. 1).
, And reciprocates between the fastener supply position 36 on the downstream side. In addition, the second chuck 3
4 may be driven by an electric cylinder, a servomotor, or the like.

The first chuck 31 and the second chuck 34 are mounted on opposite sides with the fastener 11 interposed therebetween. When one moves, the other is in an open state, and the two move. Sometimes it does not interfere.

A pair of upper and lower feed rollers 37 and 38 are located upstream of the second chuck 34. The lower feed roller 37 is located below the fastener 11 and is driven by a servo motor or a stepping motor 37a. The upper feed roller 38 is moved up and down by an air cylinder 38a.
7 and the fastener 11 is clamped.

The detection unit 41 is attached below the guide unit 23, and receives a signal from a servo motor of the feed roller 37 or a control unit of the stepping motor 37a.
3 and a switch 45 having a normally closed contact and opening and closing according to the horizontal movement of the hook 44. The hook portion 44 is supported by a lever 44a so as to be movable in the horizontal direction.
The fastener 11 is normally urged by a spring 46 in a direction opposite to the direction in which the fastener 11 is pulled out.

The cutting portion 47 includes a pair of vertically movable blade portions 4.
8, 48, and cut the strip 12 from the top and bottom,
The pulled-out fastener 11 is separated from the fastener group 16. The cutting portion 47 is provided with a receiving roll 49 that rises in conjunction with the blade portion 48 and receives the lower surface of the fastener 11, and holds the fastener 11 horizontally during cutting.

In FIGS. 8 and 9, a pair of upper and lower feeding rollers 51, 51 are provided at a position downstream of the fastener supply position 36. The upper feeding roller 51 is configured to be vertically movable by a cylinder 51a, and the lower feeding roller 51 is driven by a servomotor 52. The delivery rollers 51, 51 sandwich the fastener 11 transferred by the second chuck 34 and send the fastener 11 onto the slide base 53. In addition, a space is formed on the joint surface between the feeding rollers 51 and 51 so that the engaging teeth 13 of the fastener 11 and the slider 14 can pass therethrough. The bag material 2 has an opening 6 formed therein, and is intermittently transferred onto a slide base 53 along a guide roller 54. Welding part 55
Is a well-known ultrasonic welding unit having a welding roller 56, which welds the band 12 of the fastener 11 along the opening 6 of the bag material 2.

Next, the steps of the above embodiment will be described. (1) In FIG. 10, the stocker section 21 of the supply section 20
Group 16 supplied from a plurality of rollers 2
2 and is inserted into the guide portion 23 and stopped at a position where the tip protrudes from the guide portion 23. Then, the first chuck 31 moves to the front end of the guide portion 23, the two arms 32, 32 close in the direction of the arrow, and grips the tip of the fastener group 16.

(2) The first chuck 31 moves to the extraction position 33 through the second chuck 34 (FIG. 1).
1). Here, the second chuck 34 closes the two arms 35, 35 and grips the intermediate portion of the fastener 11. At the same time, the first chuck 31 has two arms 32, 3
2 is opened to release the tip of the fastener 11. Since the second chuck 34 shapes the fastener 11 into a V-shape, the tip of the fastener 11 is held horizontally without hanging down.

(3) Next, the upper feed roller 38 descends and contacts the lower feed roller 37 while pushing down the fastener 11 to clamp the fastener 11 (see FIG. 12). Then, a pair of feed rollers 37 and 38 are driven in the direction of the arrow, and the fastener 11 is fed forward. Since the second chuck 34 is stopped, the fastener 11
Hangs in a U-shape between the feed rollers 37 and 38 and the second chuck 34. When the feed rollers 37 and 38 are driven, the fastener group 16 in the guide portion 23 is moved.
Is also sent forward. When a signal is sent from the servo motor or the control unit of the stepping motor 37a, the air cylinder 43 operates to raise the hook portion 44, and the tip is inserted into the slit 11a between the two stoppers 15. (See FIG. 12).

(4) Further, when the fastener 11 is pulled forward, the stopper 15 on the rear side of the slit 11a comes into contact with the hook portion 44, and the hook portion 44 is moved forward against the elastic force of the spring 46. Move. As a result, the switch 45 is turned off, and the feed rollers 37 and 38 are temporarily stopped (see FIG. 13). When the type of the bag is different and the length of the fastener 11 is different, the feed rollers 37, 3
8 may be changed to change the length of the fastener 11 hanging down in a U-shape. The position where the fastener 11 stops is determined by the rear stopper 15 in the slit 11a. Since the distance A between the two stoppers 15 is constant, the fastener 1
One end is precisely positioned.

(5) Next, the receiving roll 49 rises to receive the lower surface of the fastener 11, and holds the fastener 11 horizontally. Therefore, the pair of blades 48, 48
1, the cutting part 47 cuts the central part of the slit 11a and pulls out the extracted fastener 11 to the fastener group 16
(See FIG. 14). Here, the feed rollers 37 and 38 are driven again, and the receiving roll 49 is lowered. All of the separated fasteners 11 move to the front side of the feed rollers 37 and 38, and the fasteners 11 hang down behind the second chuck 34 as shown by a chain line.

(6) Next, the second chuck 34 is moved to the position shown in FIG.
As shown in FIG.
The tip of the fastener 11 is a pair of feeding rollers 51, 5
1 and the fastener 11 is
Moved to On the other hand, the bag material 2 is transferred from above to the slide base 53 along the guide roller 54, where the band 12 of the fastener 11 is overlaid on the edge of the opening 6 (see FIG. 9). Then, the bag material 2 and the fastener 11
Are integrally passed through the welding portion 55 and the welding roller 5
6, the belt 12 of the fastener 11 is welded along the opening 6 of the bag material 2. The opening 6 of the bag material 2 is connected by a fastener 11. (7) Thereafter, the bag material 2 is manufactured into the bag 1 shown in FIGS. 2 and 3 through a normal bag making process.

According to the above embodiment, the following effects can be obtained. (1) The fastener group 16 in which a plurality of fasteners 11 are connected is supplied to a bag making machine and cut into a required length, so that the fasteners 11 can be continuously supplied to a mass production line, and welding is automated. be able to. (2) Since the opening 6 of the bag material 2 is connected by the fastener 11 in the first step of the bag making machine, the bag material 2 can be placed in the same bag making process as before. (3) Since the welding step of the fastener 11 can be incorporated into the automatic assembling step, the conventional manual welding step can be omitted, and the productivity can be significantly improved.

[0024]

According to the first aspect of the present invention, there is provided a fastener welding apparatus for a bag making machine, wherein a plurality of fasteners for engaging and disengaging two adjacently arranged strips by engaging teeth are connected at predetermined intervals. A supply unit that supplies a group, a first chuck that is provided so as to be reciprocally movable and grips a tip of the fastener group and pulls out to a predetermined position, and a middle part of the extracted fastener that is provided so as to be reciprocally movable and holds A second chuck for holding the tip horizontally, a feed roller for feeding the remaining portion of the fastener held by the second chuck forward, and detecting the end of the pulled-out fastener to separate the fastener. A cutting portion, a feeding roller for sandwiching the fastener transferred by the second chuck to make the band of the fastener follow the opening of the bag material, and And a welding portion to be welded to the edge of the opening of the material, so that the fastener can be continuously supplied to the mass production line, and the fastener mounting process can be performed mechanically and continuously. Thus, an excellent effect that productivity can be remarkably improved can be obtained.

According to a second aspect of the present invention, the edges of the pair of bag materials are
In the welded bag, with respect to one of the pair of bag materials,
A step of forming an opening by cutting off an intermediate predetermined width dimension,
A step of pulling out the tip of a group of fasteners in which a number of fasteners are connected at predetermined intervals and separating one fastener from the group of fasteners;
Is supplied along the opening of the bag material.
Ultrasonic welding on the edge of the bag material with a fastener
Since the fastener is welded to the opening of the bag material in the first step, there is an excellent effect that the bag making step can be remarkably easily performed.

[Brief description of the drawings]

FIG. 1 is a front view showing a schematic process.

FIG. 2 is a front view of a bag.

FIG. 3 is a longitudinal sectional view of a bag.

FIG. 4 is a perspective view of a fastener group.

FIG. 5 is a perspective view of a supply unit.

FIG. 6 is a front view of a first chuck.

FIG. 7 is a front view of a second chuck.

FIG. 8 is a front view showing a welding portion.

FIG. 9 is a perspective view showing a state in which a fastener is welded to the bag material.

FIG. 10 is an explanatory diagram showing a first step.

FIG. 11 is an explanatory view showing a step of pulling out a fastener.

FIG. 12 is an explanatory view showing a step of sending out a fastener.

FIG. 13 is an explanatory diagram showing a step of detecting the end portion of the fastener.

FIG. 14 is an explanatory view showing a step of cutting the fastener.

[Explanation of symbols]

 Reference Signs List 1 bag 2 bag material 6 opening 11 fastener 12 band 13 engaging tooth 15 stopper 16 fastener group 20 supply unit 23 guide unit 31 first chuck 33 pull-out position 34 second chuck 36 fastener supply position 37 feed roller 38 feed Roller 41 Detection part 47 Cutting part 51 Feeding roller 55 Welding part

Claims (2)

(57) [Claims] 1. A supply unit for supplying a group of fasteners in which a plurality of fasteners for engaging and disengaging two adjacently arranged strips by engaging teeth are provided at a predetermined interval, and a reciprocally movable supply unit is provided. A first chuck that grips the tip of the fastener group and pulls out the fastener to a predetermined position; and a second chuck that is provided so as to be reciprocally movable and grips an intermediate portion of the pulled-out fastener and holds the tip horizontally. A feed roller for feeding the remaining portion of the fastener held by the second chuck forward; a cutting unit for detecting the end of the extracted fastener and separating the fastener; and a fastener transferred by the second chuck. A feeding roller for sandwiching the zipper band along the opening of the bag material, and a welding portion for welding the zipper band to the edge of the opening of the bag material. A fastener welding device in a bag making machine. 2. A bag in which the edges of a pair of bag materials are welded.
Te, switching the predetermined width of the intermediate with respect to one of the pair of bag material
Forming an opening dividing it draws the leading end of a large number of fasteners and fastener group linked at a predetermined interval, and separating the one fastener from the fastener group, the one Place the fastener along the opening of the bag material
Ultrasonic welding to the edge of the opening while supplying
Connecting the materials with a fastener by using a fastener .