JPH06126865A - Device for sewing container bag - Google Patents

Abstract

PURPOSE:To easily sew together a cylindrical bag body and a circular bottom material in the formation of a bottomed cylindrical container bag. CONSTITUTION:The device for sewing container bag is provided with a plurality of temporary clamps 40 radially movable toward the center of a rotatable disk-shaped plate 20 as required and a plurality of strut retainers 30 each of which consists of two interconnected rocking pieces reciprocally movable diametrically of the disk-shaped plate 20. The temporary clamps 40 are used to keep a circular bottom material horizontal at the lower part of the disk-shaped plate 20. A cylindrical bag body is fitted over the outer circumferential part of the disk-shaped plate 20 with its axis disposed vertically, the temporary clamps 40 are moved radially inwardly to provide a clearance for rotation of the disk-shaped plate 20 after the operation of the strut retainer 30 and the sewing operation is performed on the circumferential part of the rotating disk-shaped plate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine used for manufacturing a container bag having a bottomed cylindrical shape.

[0002]

2. Description of the Related Art In order to manufacture a container bag, a circular bottom member is sewn at one end of a bag body previously sewn in a cylindrical shape. However, the bag body and the bottom member are large and relatively thick. Since it was made of sheet material, the work of folding back the edges before sewing them together and the work of holding the bag body etc. around the sewing machine and changing the posture during sewing are heavy labor. Was becoming.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a container bag sewing apparatus which facilitates the sewing work of the bag body and the bottom member.

[0004]

In order to achieve the above object, the present invention employs the following means. That is, a base frame, a rotary substrate that is horizontally rotatably held by the base frame, has a diameter substantially equal to the inner diameter of the bag body, and has a plurality of notches formed at predetermined intervals on the outer peripheral portion, At least one is provided between each of the notches on the upper surface of the outer peripheral portion of the rotating substrate, and the circular bottom member and the provisional portion for holding the overlap of the edge portion of the bag body, which are retractable toward the center of the rotating substrate during sewing. A clamp body, a circular bottom member that is provided in each cutout portion of the rotating substrate and is capable of advancing and retracting to the outside of the cutout portion along the radial direction of the rotating substrate, and a projecting holder for the bag body, and rotating from the base frame. The sewing machine is provided so as to be capable of advancing and retracting up to a position facing the outer peripheral portion of the substrate.

[0005]

The present invention has the following functions. First, an arbitrary portion of the outer peripheral edge portion of the bottom member is clamped from the lower side of an arbitrary temporary clamp body on the rotating substrate. Next, using this clamp position as a starting point, an outer peripheral edge portion of the bottom member that corresponds in position to another temporary clamp body (for example, an adjacent temporary clamp body that is one above) is found,
This outer peripheral edge is clamped in the same manner as above. This procedure is performed for all the temporary clamp bodies in a predetermined order, and the bottom member is held substantially horizontally on the lower surface of the rotary substrate by bending the entire circumference of the bottom member upward.

Next, a bag body with its cylindrical axis oriented vertically is fitted from the lower side so as to surround the bent outer periphery of the bottom member, and the upper edge of the bag body is attached. While being overlapped with the outer peripheral edge of the bottom member, the outer peripheral edge is clamped by the temporary clamp body that is clamping. Next, by advancing all of the plurality of tension holders provided on the rotating substrate toward the outside of the rotating substrate, the bag body is passed through the outer peripheral portion of the bottom member, and the predetermined position on the inner peripheral surface is removed. Produces a holding force by spreading toward. In the state where the holding force is generated in this way, the bag body and the bottom member do not drop off from the rotating substrate even if the temporary clamping body does not clamp them, so the temporary clamping body is retracted toward the center of the rotating substrate. At this time, if necessary, a folding edge may be formed on the overlapping portion of the end portion of the bag body protruding upward from the outer peripheral portion of the rotating substrate and the outer peripheral edge portion of the bottom member. To form a part. Next, the sewing machine is advanced toward the rotary substrate, and the overlapping portion of the bag body and the bottom member is sewn together with the rotation of the rotary substrate.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings. In this specification, the front means the front side in FIG. 2, the rear means the back side, the left means the left side in FIG. 2, and the right means the right side in FIG. As shown in FIG. 1, the bag body 1 is preliminarily sewn into a cylindrical shape, and the bottom member 3 is cut into a circle having a diameter slightly larger than the diameter of the bag body 1. To sew both of them, the outer peripheral edge portion 4 of the bottom member 3 is bent upward on the entire circumference, and the outer peripheral surface of the bent outer peripheral portion and one end portion 2 of the bag body 1 are sewn.
The inner peripheral surface is overlapped and the overlapped portion (a folded edge portion is formed if necessary) is sewn.

As shown in FIGS. 2 to 4, the cloth holding space 1 is provided inside.
1, a base frame 10 framed so as to form a frame 1, a rotary substrate 20 suspended and held above the cloth holding space 11 of the base frame 10, and a front side of the front side of the base frame 10 which is on standby at the time when necessary. The crease device 60 is provided so that its position can be changed toward the upper portion of the outer periphery of the rotary substrate 20, and the crease device 60 can stand by outside the material holding space 11 of the base frame 10 and can move forward and backward toward the outer periphery of the rotary substrate 20 when necessary. The sewing machine 100 is provided, and the plurality of projecting holders 30 provided for the rotating substrate 20, the plurality of temporary clamp bodies 40, and the plurality of edge holders 27 are provided. There is.

The rotating substrate 20 is in the form of a disk having a plurality of notches 21 (in the present embodiment, one at each 1/4 circle position, a total of 4) in the outer peripheral portion. Thus, the rotating device 25 provided on the upper portion of the base frame 10 enables horizontal rotation. The diameter of the rotating substrate 20 is formed to be substantially equal to or slightly smaller than the inner diameter of the bag body 1, and the bag body 1 can be fitted to the outer peripheral portion thereof. The notch 21 penetrates the rotary substrate 20 in the vertical direction (plate thickness) and has an opening facing the outer peripheral portion, and each of the notches 21 has the above-mentioned protruding holder 30. Is provided.

As shown in FIGS.
Has a pair of oblong oscillating plates 31 and 32 formed so as to be gently curved along the radius of curvature of the outer peripheral portion of the rotary substrate 20. One end of each of the swing plates 31 and 32 is swingable with respect to the rotary substrate 20 at a side portion of the cutout portion 21 (the arrow P in FIG. 5 is the swing center).
And the other ends of the pins 37 through the elongated holes 33 formed so as to penetrate each other in the plate thickness direction.
Are connected by. It should be noted that the rotating plate 20 is connected so that the front and back surfaces of the rocking plates 31 and 32 are flush with each other so as to form a sandwich structure with each other in the thickness direction (FIG. 6). The pin 37 provided so as to vertically pass through the long holes 33,
It is connected to a drive rod 36 of a forward / backward drive tool 35 such as a fluid pressure cylinder via a forward / backward block 34. The advance / retreat driving tool 35 is in a state in which the drive rod 36 is retracted when the bag body 1 and the like are not fitted to the rotary substrate 20. Therefore, the tension holding body 30 is provided with the swing plates 31, 32.
The outer side edge of the inward part of the rotary board 20 is inward of the contour of the rotary substrate 20 when the planar shape is assumed to be a perfect circle. However, when the advancing / retreating drive tool 35 extends the drive rod 36 at the stage when the bag body 1 or the like is fitted on the rotary substrate 20, the tension holding body 30 causes the oscillating plates 31,
The outward side portion of 32 draws an arc that matches the contour of the rotating substrate 20 assuming that the planar shape of the rotating substrate 20 is a perfect circle. Therefore, in the bag body 1 and the like, predetermined positions on the inner peripheral surface thereof are evenly pressed outward,
Even if no other holding force is applied, the rotating substrate 20 is suspended and held. The amount of forward / backward movement of the tension holding body 30 (the amount of swing of each swing plate 31, 32) is determined by the sleeve 3 fitted to the drive rod 36 (see FIG. 7) of the forward / backward drive tool 35.
It is adjustable by selecting the length of 8 and the degree of tightening of the nut 39.

As shown in FIG. 4, at least one temporary clamp body 40 is disposed between the cutouts 21 on the upper surface of the rotary substrate 20 (in this embodiment, both sides of the cutouts 21 are sandwiched between the cutouts 21). There are two of them (see FIG. 5), and a total of eight are arranged in a radial pattern). As shown in FIG. 8 and FIG. 9, these temporary clamp bodies 40 are centered on a base 41 fixed on the rotary substrate 20 and an axis parallel to the tangential direction of the rotary substrate 20 from the tip of the base 41. The rotatable substrate 20 is swingably held and is in a prone posture.
An L-shaped raising / lowering base 42 having a toothed outer surface 43 positioned on the outer peripheral part of the upper and lower sides, and a rotatably held by the raising / lowering base 42 via a hinge lever 46.
The rod end 47 is rotatably connected to the pressing piece 44 having a toothed inner surface 45 facing 3 and the projecting end of the hinge lever 46 (end near the center of the rotary substrate 20) in the pressing piece 44. And a drive tool 48 such as a fluid pressure cylinder. The drive tool 48 is attached to the rotary substrate 20 by a bracket 51 that holds the base end of the drive tool 48 so as to be swingable. A push ball 50 is attached to the pressing piece 44 on the upper surface opposite to the toothed inner surface 45. Figure 10
As shown in FIG.
The toothed inner surface 45 has a sawtooth-shaped cross section whose upper side is horizontal, and the bottom member 3 and the bag body 1 (FIG.
(See) Clamping force can be increased. Further, as shown in FIG. 20, the toothed outer surface 43 of the tilting base 42 is
Setting line 5 that horizontally crosses a position slightly higher than the center
2 is displayed, and as shown in FIG. 21, when the bottom member 3 is clamped, as a guide for the amount of insertion of the outer peripheral edge portion 4, the reliability of the clamp and the uniformity of the sewing position can be achieved. There is. The edge 2 of the bag body 1
Is clamped by inserting the toothed inner surface 45 and the toothed outer surface 43 so as to reach the respective upper end positions beyond the setting line 52.

At the stage of holding the bottom member 3 and the bag body 1 on the rotating substrate 20, as shown in FIG.
The drive tool 48 is in a state where the rod 49 is extended,
Therefore, the raising / lowering table 42 is in a posture of being laid down on the tip side of the base 41, and the pressing piece 44 is closed with respect to the raising / lowering table 42. At this time, if the push ball 50 is pushed toward the center of the rotary substrate 20, the pressing piece 44 can be swung so as to slightly open from the tilting base 42. By doing so, A gap for inserting the outer peripheral edge portion 4 of the bottom member 3 and the end edge portion 2 of the bag body 1 can be formed between the toothed outer surface 43 of the upright table 42 and the toothed inner surface 45 of the pressing piece 44. . When the push balls 50 are released after each of these insertions, the pressing piece 4
4 is returned to the closed state by the actuation of the drive tool 48 each time, and the clamping of the bottom member 3 and the bag body 1 (see FIG. 21) is completed.

On the other hand, when the driving tool 48 is caused to perform the retracting operation of the rod 49 in the clamped state as described above, first, the bracket 51 and the driving tool 48, and the driving tool 48 and the pressing piece 44 are moved. Until the hinge lever 46, and the three fulcrums for swingably holding the hinge lever 46 and the tilting base 42 are positioned in alignment with each other, the opening operation (clamping operation) of the pressing piece 44 with respect to the tilting base 42 (clamping) is performed. The release operation) is performed with priority. And
After that, when the rod 49 is further moved in and out by the driving tool 48, the tilting table 42 is moved relative to the base table 41.
It will be inverted toward the center of 0. Such a reversing operation corresponds to a so-called retracting movement as the so-called temporary clamp body 40 with respect to the sewing work described below performed along the outer peripheral portion of the rotary substrate 20.

Next, the creasing device 60 will be described. As shown in FIGS. 2 to 4, this creasing device 6
No. 0 is suspended and held via a movable frame 90 with respect to a horizontal projecting rod 13 (see FIG. 3) projecting from the upper horizontal rail 12 of the base frame 10 toward the front of the central portion of the cloth holding space 11. There is. As shown in FIGS. 11 to 13, the movable frame body 90 has a neck so that the holder portion 14 provided at the projecting end of the horizontal projecting rod 13 can be positioned in two positions, a side position and a front position. A swinging frame 91 that is freely swingable, and a lifting / lowering drive tool 9 such as a fluid pressure cylinder provided on the swinging frame 91.
Lifting bracket 92 suspended and held by 3
And have. The crease forming device 60 described above is provided on the elevating bracket 92. Reference numeral 94 is a guide bar for lifting guides, and 95 is a holder tool for holding these guide bars 94. Further, in FIG. 11, 96 is an operating rod with a grip ball used for swinging the swivel frame 91, and 97 is a wiring cord or the like passed between the swivel frame 91 side and the elevating bracket 92 side from a disconnection or the like. It is a wiring guide having a multi-joint structure for protection. The swivel frame 9
1 is swung to the front position of the horizontally projecting rod 13, and then the raising / lowering bracket 92 is lowered from the swivel frame 91.
However, as shown in FIG. 22, it is positioned exactly above the outer peripheral portion of the rotary substrate 20. At this time, the rotating substrate 2
0 is in a state in which the bottom member 3 and the bag body 1 are suspended and held, and the outer peripheral portion 4 of the bottom member 3 and the edge portion of the bag body 1 are upwardly directed to the outer peripheral portion of the rotary substrate 20. The overlapping portion formed by 2 and 3 is projected. The edge portion 2 of the bag body 1 projects further upward than the outer peripheral edge portion 4 of the bottom member 3 as shown in FIGS. 20 and 21, but in the following, only the bag body 1 projects. The entire overlapping portion including the portion will be referred to as a "fabric overlapping portion".

As shown in FIG. 14, the creasing device 60 is provided.
Is an upper swing lever 61 and a lower swing lever 62, which are assembled to form a link mechanism with connecting links 63 and 64 using the lifting bracket 92 of the movable frame 90 as a substrate. A first crease portion 70 that operates using the movement of the upper swing lever 61 as a drive source;
It has a second crease portion 80 that operates using the movement of the lower swing lever 62 as a drive source. The upper swing lever 61 is L-shaped, and is swingably held by the lifting bracket 92 with the bent corner portion as a fulcrum. The lower swing lever 62 has its base as a fulcrum. Drive motor 65 (see FIGS. 11 and 17) that is swingably held by the lifting bracket 92 and one end of the connecting link 63 is attached to the opposite side of the lifting bracket 92.
It is eccentrically attached to the rotating shaft 66 (see FIG. 3).
Therefore, when the drive motor 65 is operated, the lower swinging lever 61 is repeatedly swung along the horizontal direction at the lower end of the downward bending piece, and the lower swinging lever 62 is vertically moved at the tip thereof. And repeatedly rocks. It is to be noted that, when the drive motor 65 is not operating, the connecting link 63 can always be kept in the most lowered state. In this state, the downward bending piece of the upper swing lever 61 is The lower end is positioned farthest from the side edge of the lifting bracket 92. Therefore,
As described above (see FIG. 22), when the swing frame 91 is swung and the elevating bracket 92 is lowered in the movable frame body 90, the crease device 60 includes the downward bending piece of the upper swing lever 61. Section and side edge 9 of the lifting bracket 92
It is positioned so as to sandwich the material overlapping portion projecting upward on the outer peripheral portion of the rotary substrate 20 in the gap formed between the two and 2b.

As shown in FIG. 15, the first crease portion 70 is formed.
Is directed toward the elevating bracket 92 side (that is, the fixing piece 73 side) with respect to the fixed piece 73 attached to the side edge 92b of the elevating bracket 92 and the downward bending piece portion of the upper swing lever 61. And a motion piece 71 attached to the surface. The operating piece 71 has a width dimension capable of facing the fixed piece 73, and a portion facing the fixed piece 73 has two upper and lower claw portions 7 projecting toward the fixed piece 73.
Two are provided. Further, the fixed piece 73 is formed with two recesses 74 capable of receiving the respective claw portions 72 of the operation piece 71 when the upper swing lever 61 swings. Therefore, when the fabric overlapping portion is sandwiched between the fixed piece 73 and the operating piece 71 and then the upper swing lever 61 is swung once, the fabric overlapping portion moves from the inner peripheral surface side to the outer peripheral surface side. Two upper and lower claw marks protruding toward the side (see arrow marks a and b in FIGS. 23 and 24) are press-molded. Therefore, when the rotary substrate 20 is rotated while repeating the swing of the upper swing lever 61, the above-mentioned claw mark is formed into two fold lines a and b (see FIG. 22) connected over the entire circumference of the material overlapping portion. Will be formed.

As shown in FIG. 16, the second crease portion 80 is formed.
Is a fixed piece 85 attached to the front surface 92a of the lift bracket 92 (the surface on which the lower swing lever 62 and the like are provided), and an operating piece 81 attached to the tip of the lower swing lever 62. And have. The fixing piece 85 has a shape in which a hook-shaped portion protrudes downward from one side of the flat-plate portion, and an upper pressing lower surface 87 is formed on the lower surface of the flat-plate portion and a lower surface of the hook-shaped portion is formed on the lower surface. The lower side pressing lower surfaces 86 are formed respectively. Further, the operating piece 81 also has a shape as if the fixing piece 85 is turned upside down, and the upper pressing upper surface 83 facing the upper pressing lower surface 87 of the fixing piece 85 and the lower pressing lower surface 86. And a lower-side pressing upper surface 82 facing to.

By the way, as described above, the first creasing portion 7
No. 0 fixing piece 73 (see FIG. 15) is arranged on the side edge 92b of the elevating bracket 92, and the fixing piece 85 (see FIG. 16) of the second crease portion 80 is the front surface 92 of the elevating bracket 92.
It is located at a. That is, as shown in FIG. 17, these fixing pieces 73 and 85 are adjacent to each other along the plate thickness direction of the elevating bracket 92, but the first and second fixing pieces 73 and 85 are not adjacent to each other with respect to the rotating direction of the rotating substrate 20 (see arrow X). The fixed piece 73 of the first crease portion 70 always precedes, and the fixed piece 85 of the second crease portion 80 is positioned on the downstream side thereof.
On the other hand, the height difference between the upper and lower pressing lower surfaces 87 and 86 of the fixed piece 85 in the second fold crease 80 (the same as the height difference between the upper and lower pressing upper surfaces 83 and 82 of the operating piece 81) is the first crease crease. Vertical pitch between the concave portions 74 of the fixed piece 73 in 70 (same as the vertical pitch between the claw portions 72 of the operating piece 71)
Of course, in the fixing piece 85 of the second crease portion 80, the pressing lower surfaces 87 and 86 are flush with or substantially flush with the respective virtual horizontal planes including the tip deep portions of the upper and lower recesses 74. It is positioned so as to be flush. Therefore, when the operating piece 81 is raised (see FIG. 14), the pressing upper surface 8 thereof is
3, 82 and the pressing lower surfaces 87, 86, the claw portion 7
It is possible to pinch the dough overlapping portion in the vertical direction at or near the matching height position between the tip of 2 and the depth of the tip of the recess 74.

The second crease portion 80 has various positional relationships with the first crease portion 70 as described above, and therefore, by repeatedly swinging the lower swing lever 62, as shown in FIG. , The linear creases B and B which are press-molded by the first crease forming unit 70 on the material overlapping portion (FIG.
(See (1)), a knob in the vertical direction is further added (see (b) in the same figure) to form the folds (a) and (b) clearly.

As shown in FIGS. 4 and 18, the edge holder 27 provided on the upper surface of the outer peripheral portion of the rotary substrate 20 forms a lateral V-cut groove along the outer peripheral portion of the rotary substrate 20. It is an arc-shaped thin plate and is provided so as to be as many (wide range) as possible. This edge holder 27
After the upper and lower fold lines a and b are formed by the first and second crease forming portions 70 and 80 in the material overlapping portion protruding above the outer peripheral portion of the rotating substrate 20, the material is manually formed. At the same time when the overlapping portion is double-folded, the folded and folded edge portion 5 is fitted. As shown in FIG. 24 (a), this double-folding is performed at the edge portion 2 of the bag body 1.
First, the portion of the bottom member 3 projecting further upward than the outer peripheral edge portion 4 is folded back inward along the fold line a on the upper side, and then the fold line on the lower side is formed as shown in FIG. Fold back the entire fabric overlapping section once again,
The state shown in FIG. The edge holder 27
Are the rocking plates 31 and 32 of the above-mentioned tension holding body 30.
It is advisable to also provide the upper part (see FIG. 5) in a range that does not adversely affect its operation.

As shown in FIGS. 2 and 3, the sewing machine 10 described above is used.
0 is installed on a left-right moving frame 106 that can slide along two front and rear guide rails 105. As shown in FIG. 18, the sewing table 101 included in the sewing machine 100 has a cloth receiving plate 102 attached to its projecting end portion, and the cloth pressing plate 103 holds the cloth pressing member 103 swingably. . The cloth pressing tool 103 is for laying the folded edge 5 in a state of being fitted into the edge holding tool 27 flat for convenient sewing.

[0022]

Next, the operation of the embodiment apparatus will be described. As shown in FIG. 19, first, in any temporary clamp body 40 on the rotating substrate 20, the push ball 50 is pushed to push the pushing piece 44.
Is opened, and an arbitrary portion of the outer peripheral edge portion 4 of the bottom member 3 is inserted from the lower side thereof until it coincides with the setting line 52 (see FIG. 20) of the tilting table 42 and clamped. At this time, the surface of the bottom member 3 (the surface that faces outward when used as a container bag) is set to face the upright base 42 side of the temporary clamp body 40. Next, with this clamp position as the starting point, the outer peripheral edge portion 4 of the bottom member 3 that corresponds in position to the adjacent temporary clamp body 40 placed one by one from the above is found, and this outer peripheral edge portion 4 is formed in the same manner as above. Make it clamp. After the rotating substrate 20 is rotated once by repeating this procedure, the rotating substrate 20 is rotated.
The outer peripheral edge portion 4 of the bottom member 3 with respect to every other temporary clamp body 40 that is still in a non-clamped state while making one more turn.
I will let you clamp. As a result, the bottom member 3 is held on the lower surface of the rotating substrate 20 in a state where the entire outer peripheral portion thereof is bent upward and is substantially horizontal as a whole.

Next, the bag body 1 whose cylindrical axis is oriented in the vertical direction is held by the bottom member 3 as described above.
From the lower side, it is fitted so as to surround the bent outer peripheral portion. At this time, at the same time, the pressing piece 44 is opened in any temporary clamp body 40, and as shown in FIG. (Toothed inner surface 45 and toothed outer surface 43
Of the bag body 1 so that the end edge portion 2 of the bag body 1 reaches the upper edge position of the bag body 1, and in this state, the bag body 1 is clamped together with the outer peripheral edge portion 4 of the bottom member 3. Of course, the surface of the bag body 1 (the surface that faces outward when used as a container bag) is the outer peripheral surface. After sequentially performing such clamping on all the temporary clamp bodies 40, all the tension holding bodies 30 (see FIGS. 4, 5, and 7) provided on the rotary substrate 20 are moved to the outside of the rotary substrate 20. Operate to advance. As a result, in the bag body 1, the predetermined portions of the inner peripheral surface of the bag body 3 are evenly pressed outward through the outer peripheral portion of the bottom member 3, so that the rotating substrate 20 does not need to receive any other holding force. It will be suspended and held against.

Next, as shown in FIG. 22, the swivel frame 91 is swung in the movable frame 90 and the lifting bracket 92 is lowered (see FIG. 11), and the crease device 60 provided on the lifting bracket 92. Is positioned on the upper portion of the outer peripheral portion of the rotating substrate 20. At this time, in the creasing device 60, the first creasing portion 70 (see FIG. 15) sandwiches the fabric overlapping portion projecting above the outer peripheral portion of the rotary substrate 20, and the second creasing portion 80 ( 16 (see FIG. 16) is set so as to be placed side by side on the rotary substrate 20.
22 is rotated in the direction of the arrow X in FIG. 22 to operate the crease forming device 60, two distinct upper and lower creases a and b are formed over the entire circumference of the fabric overlapping portion (FIG. 23). In addition, with the rotation of the rotating substrate 20,
Since each temporary clamp body 40 interferes with the creasing device 60, the temporary clamp bodies 40 are sequentially and automatically driven by the driving tool 48 (see FIG. 8) at the position immediately before the creasing device 60. Move towards the center of. After this crease is completed, the raising / lowering bracket 92 is raised and the revolving frame 91 is swung in the opposite direction (see FIG. 11), and the crease device 60 is returned to the standby position.

Next, as shown in FIGS. 24 (a) to 24 (c), the fabric overlapping portion is manually double-folded along the upper and lower creases a and b, and the folded edge portion is folded. As shown in FIG. 18, 5 is fitted into each edge holder 27 on the rotary substrate 20. Then, the sewing machine 100 is advanced toward the rotating substrate 20, the part of the folding edge portion 5 is sandwiched between the material receiving plate 102 and the material pressing tool 103, and the rotating substrate 20 is rotated. Sewing with the sewing machine 100 is performed. After that, the sewing machine 100 is returned to the standby position, the protrusion holding body 30 (see FIGS. 4 and 5 and 7) of the rotary substrate 20 is retracted, and the container bag after the completion of sewing is taken out. In addition, in each temporary clamp body 40 (see FIG. 8), the raising / lowering table 42 is returned to the state in which it is laid down on the outer peripheral portion of the rotary substrate 20, and is made to stand by for the next sewing operation.

[0026]

The present invention has the following effects due to the above-described structure. In manufacturing a container bag, the sewing work of the bag body and the bottom member has become easy.

[Brief description of drawings]

FIG. 1 is a perspective view showing a bag body and a bottom member.

FIG. 2 is a front view showing an embodiment of the present invention.

FIG. 3 is an enlarged right side view of FIG.

FIG. 4 is an enlarged plan view of FIG.

5 is an enlarged view of part B in FIG.

6 is an enlarged cross-sectional view taken along the line CC of FIG.

FIG. 7 is an enlarged cross-sectional view taken along line DD of FIG.

FIG. 8 is an enlarged arrow view taken along line EE of FIG.

9 is an enlarged cross-sectional view taken along line GG of FIG.

10 is an enlarged view of part H in FIG.

FIG. 11 is an enlarged view of part A in FIG.

12 is a sectional view taken along line JJ of FIG.

13 is a sectional view taken along line LL in FIG.

FIG. 14 is an enlarged view of a portion K in FIG.

FIG. 15 is a perspective view showing a main portion of a first crease portion.

FIG. 16 is a perspective view showing a main part of a second fold score part.

FIG. 17 is a sectional view taken along line MM in FIG.

FIG. 18 is a perspective view showing a sewing situation with a sewing machine.

FIG. 19 is an enlarged view of the essential parts showing the procedure for holding the bottom member and the bag body on the rotating substrate.

20 is an enlarged arrow view taken along the line FF of FIG.

21 is a cross-sectional view taken along the line NN of FIG.

FIG. 22 is an enlarged view of a main part showing an operating state of the creasing device.

23A and 23B are views for explaining the operating condition of the second crease portion, in which FIG. 23A shows a state before performing the knob, and FIG. 23B shows a state in which the knob is added.

FIG. 24 is a schematic diagram illustrating double folding, (a)
It is shown that folding is performed in the order of (c).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bag body 2 End edge part 3 Bottom member 4 Outer peripheral edge part 10 Base frame 20 Rotating substrate 21 Notch part 27 Edge part holder 30 Stretch holder 40 Temporary clamp body 60 Folding device 70 First fold part 72 Claw part 74 Recessed portion 80 Second crease portion 82/83 Pressing upper surface 86/87 Pressing lower surface 100 Sewing machine

Claims (2)

[Claims] 1. A sewing machine for a container bag, wherein a circular bottom member is sewn to one end of a cylindrical bag body, the base frame and an inner diameter of the bag body rotatably held by the base frame. A rotary substrate having substantially equal diameters and a plurality of notches formed on the outer peripheral portion at predetermined intervals, and at least one rotary substrate provided between the notches on the upper surface of the outer peripheral portion of the rotary substrate at the time of sewing. Of the circular bottom member and the temporary clamp body for holding the overlap of the edge portion of the bag body, which are retractable toward the center of the rotary base plate, and the temporary clamp body provided in each notch of the rotary base plate along the radial direction of the rotary base plate. It has a circular bottom member that can be moved forward and backward to the outside of the cutout portion, a projecting holder for the bag body, and a sewing machine that can be moved forward and backward from the base frame to a position facing the outer peripheral portion of the rotating substrate. Sewing equipment for container bags Place 2. A creasing device which is capable of advancing and retreating to a position facing the upper portion of the outer peripheral portion of the rotating substrate, in the base frame,
An edge holder for fitting a circular bottom member and a folded edge formed at the edge of the bag body, which is provided in a portion of the upper surface of the outer peripheral portion of the rotating substrate excluding the cutout portion and the provisional clamp body arrangement portion. And a first crease part in which the claw part and a concave part for receiving the claw part are provided so that the claw part and the concave part for receiving the claw part repeatedly approach and depart in the horizontal direction, and the first crease part. On the other hand, the pressing upper surface and the pressing lower surface facing the pressing upper surface are vertically close to each other with the matching height position of the claw portion and the recessed portion as the sandwiching position, which is adjacently arranged on the downstream side in the rotation direction of the rotating substrate. 2. The container bag sewing device according to claim 1, further comprising a second crease portion provided so as to repeat the separation.