JPH0310031Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention relates to a bag making device in a packaging machine, and in detail, as shown in Fig. 12 A and B, a stick-shaped product group W ₁ or a flat product group that has been primary wrapped.
This relates to a flat bag making machine for packaging _W2 .

Conventionally, in this type of bag making machine, as shown in Fig. 14, the socket 102 of the bag making machine 101 is formed in an oblique shape, and the bag making machine 101 is fixed, so that the bag making machine has limited specifications. There was nothing I could do.

Therefore, the present invention provides a movable bag-making machine to form the film into a ⊃-shaped, 〓-shaped or 〓-shaped cross section in order to deal with films having different width dimensions, thereby packaging the film as shown in Fig. 13 A to F. It is an object of the present invention to provide a flat bag making device that can adapt to body shapes and increase versatility.

Next, one embodiment of the present invention will be described with reference to the drawings. First, the main parts related to the flat bag making machine (hereinafter simply referred to as bag making machine) 45 will be explained in order. In the figure, 1 is a supply conveyor that supplies the product W, and an endless bag hung on the conveyor 1. Attachments 3 are removably attached to the chain 2 at predetermined intervals so as to push the product group W ₂ . Note that the product W to be packaged is exemplified by the above-mentioned first packaged flat product group _W2 .

4 is a product group supplied by supply conveyor 1
This is a delivery conveyor that delivers W ₂ to the bag making machine 45. First, the drive device 5 of this delivery conveyor 4
I will explain about it. This drive device 5 is disposed on the machine frame _F1 , and 6 is a drive shaft rotatably supported between bearings 7, 7 disposed on the machine frame _F1 . A chain wheel 8 is attached to a key, and a drive chain 9, which is attached to a drive shaft (not shown) of the machine, is hooked to the chain wheel 8. Further, a bevel gear 10 is keyed to the drive shaft 6.

11 and 12 are transmission shafts rotatably vertically supported through a bearing 13 in the machine frame _F1 , and a bevel gear 14 that meshes with the bevel gear 10 is attached to the upper end of one of the transmission shafts 11. A bevel gear 15 is keyed to the upper end of the other speed change shaft 12 and meshes with a bevel gear 37 keyed to the shaft 36 of the drive roller 34 of the delivery conveyor 4. In addition, both transmission shafts 1
Cone pulleys 16 having the same truncated cone shape are attached to the lower ends of the pulleys 1 and 12 in opposite directions as shown in the figure, and an endless belt 17 is hung between the pulleys 16.

18 is a belt shifting mechanism that moves the belt 17 hung on the cone pulley 16 in the vertical direction; 19 is a guide member of the mechanism 18 fixed to the lower surface of the machine frame F ₁ ; A guide rod 20 is provided vertically to guide the guide rod 26 up and down. Also,
This guide member 19 is provided with an insertion hole 21 through which a speed change lever 22 is inserted, and the speed change rod 22 is inserted therethrough. A threaded portion 23 is threaded over a predetermined length at the lower end of the speed change lever 22, a stopper ring 24 is attached, and a handle 25 is attached to the upper end. A movable member 26 is screwed into this speed change lever 22, and the movable member 26
A guide rod 20 is inserted through. Further, a pulley 27 having a collar portion that engages with the belt 17 is rotatably attached to the movable member 26.
In the belt shifting mechanism 18 configured as described above, by rotating the handle 25, the movable member 26 is moved up and down, and the engaging position of the belt 17 is changed up and down, thereby controlling the speed of the belt 28 of the delivery conveyor 4. configured to change.

28 is an endless delivery belt of the delivery conveyor 4, and the carrier side 29 and return side 30 of the delivery conveyor 4 are conveyed via upper and lower folding rollers 31 and 32 provided along the oblique receiving opening 46 of the bag making device 45.
is folded back and is hung around the driving roller 34 and the driven roller 38. Reference numerals 31 and 32 are the above-mentioned folding rollers, which are rotatably supported between the supports 33 erected on the machine frame F ₁ and are provided along the angle α of the socket 46 of the bag making machine 45. The center line C ₂ of the folded belt 28a on the carrier side 29 and the return side 30, which is hung around the upper and lower folding rollers 31 and 32, is folded at an angle of 2α with respect to the center line C ₁ of the conveyance line.
In addition, the product group W ₂ on the carrier side 29 is transferred to the bag making machine 45.
The upper surface of the belt 28b on the feeding side is connected to the bag making machine 45.
It is arranged so as to be substantially aligned with the upper surface of the lower plate 48. Reference numeral 34 is a driving roller, and the support 35 is aligned with the center line C ₂ of the folded belt 28a.
A bevel gear 37 that meshes with the bevel gear 15 is keyed to the shaft 36 of the drive roller 34 . Reference numeral 38 denotes a driven roller, which is rotatably supported by a support 39 and is disposed opposite to the supply conveyor 1, and this support 39 has a shaft 4.
0 and 41 are horizontally mounted and each squeeze roller 4
2 and 43 are rotatably attached, and screws 44 are screwed into both ends of the shaft 40 so that it can be taken up.

45 is the above-mentioned bag making machine;
are arranged along the conveyance line via a movement adjustment table 52. This bag making device 45 is made by bending a plate material such as stainless steel into a U-shape (not shown), and its width is
H ₁ is formed to have a width H ₁ that is relatively larger than the width L of the bag-making bi-fold film F′, and is connected to the receptacle 46 of the product group W _{2 .}
As shown in the figure, is formed obliquely at an extremely acute angle α, and the length H ₂ of the edge of the socket 46 of the upper plate 47 and lower plate 48 of the socket 46 is formed to be extremely long. Further, the height H ₃ between the upper and lower plates 47 and 48 is set to a height H ₃ through which the product group W ₂ can pass.
Furthermore, a mounting plate 5 is provided on the lower surface of the lower plate 48 on the arcuate portion 49 side.
0 is fixed by spot welding or the like, and an elongated mounting hole 51 is provided through the mounting plate 50. Note that the edges of the upper and lower plates 47, 48 on the side of the socket 46 are formed in an oblique or arcuate shape.

52 is a movable adjustment table of the bag making device 45, which is approximately L.
shaped mounting frame 53, movement adjustment section 54 and movable body 59
A movement adjustment portion 54 is formed at the upper end of the mounting frame 53 and extends horizontally. This movement adjustment section 54 has support frames 55 extending horizontally from the left and right upper ends of the mounting frame 53, and both support frames 55
There is an adjusting screw rod 5 with a screw screwed into it approximately in the center between the two.
6 is rotatably suspended horizontally, and guide rods 57 are horizontally suspended in parallel on both sides of the threaded rod 56 to form a movement adjustment section 54. Note that 58 is a handle attached to the adjustment screw rod. Reference numeral 59 denotes a movable body, which is formed into a flat plate shape in the shape shown in the figure to which the bag making device 45 can be attached.The lower surface of this movable body 59 has a female threaded portion that is screwed into the adjustment screw rod 56 of the movement adjustment section 54. 61 and a guide hole 62 through which the guide rod 57 is inserted.
The movable body 5 has a guide member 60 attached thereto.
9 is movably connected to the movement adjustment section 54 via a guide member 60. The movable adjustment table 52 formed in this manner aligns the axis of the adjustment screw rod 56 with the center line _C1 of the conveyance line at a predetermined position on the machine frame _F1 .
The bag making device 45 is attached to the movable body 59 at an attachment angle α to the attachment plate 50 of the movable body 59.
The oblique receptacle 46 is placed at an angle α with respect to the center line C ₁ of the conveyor line, and the transfer belt 2
It is attached at a predetermined distance from the folded portion of the carrier side 29 of 8. The bag making device 45 arranged in this manner is movable in the direction of the solid arrow by turning the handle 58. Further, the movement adjustment section 54 is provided with a scale 63, and the bag making device 45 is provided with a scale 63.
The amount of movement is displayed.

Reference numeral 64 denotes a feed-out roller for the film strip F, and this roller 64 is hooked onto a plurality of vertically held rollers (not shown) and fed out from the original film holder (not shown) of the film strip F. This roller 6 is the roller at the end of the strip-shaped film F.
4 is rotatably attached between movable members 66 of feeding angle adjustment parts 65 provided above and below. The upper and lower adjustment parts 65 are formed in a symmetrical shape, and support frames 68 are attached to both ends of the sliding rails 67, and adjustment screw rods 6 are installed between the support frames 68.
9 is rotatably supported, and the rotating member 66 is screwed into an adjusting screw rod 69 and moved along a sliding rail 67. Also, a bevel gear 70 is attached to the left end of the upper and lower adjustment screw rods in the illustration, and both bevel gears 70
are meshed and connected with bevel gears 72 attached above and below the operating shaft 71, and by rotating the operating shaft 71, the upper and lower movable members 66 synchronize, hold the feed roller 64 vertically, and move in the left-right direction as one unit. Band-shaped film F
The feeding angle β of the bag making device 45 with respect to the receptacle 46 can be changed.

In addition, 73 in the figure is a guide member for the product W ₂ , which is arranged on both sides of the conveyance line, and its end is connected to the bag making machine 4.
It has been extended to within 5. Further, 74 is a side seal portion, and 75 is a cooling portion.

Next, the operation and effects of this embodiment configured as described above will be explained.

Now, the bag making device 45 of this example is for folding the strip film F in half and forming it into _a ⊃-shaped cross section. In addition, the receiving port 46 side is provided at an acute angle α with respect to the center line C ₁ of the conveyance line, and the edge length H ₂ of the receiving port 46 is made longer. 52 so as to be movable along the angle α so that the center line C ₄ of the two-fold film F′ is aligned with the center line C ₁ of the conveying line.
It is constructed so that it can be displaced relative to.
Therefore, the strip-shaped film F is fed out by the feeding roller 64 toward the tip of the socket 46 of the bag making machine 45 at an angle β to the edge of the socket 46, and both edges of the film are bent as shown in the figure. Bag making machine 4
The strip film F is hung on the upper and lower plates 47, 48 of 5 at a length _H'2 , and is bent into a substantially W shape on the side of the receptacle 46, and has a substantially U shape in cross section on the exit side of the bag making device 45. The products W ₂ that are formed and sequentially supplied at a predetermined pitch by the delivery conveyor 4 are sent out in a packaged form.

Now, the bifold film F' formed and sent out by the bag making machine 45 is formed to have a width L, and is formed into a four-sided sealed bag (Fig. 13) by the rear side seal part 74 and end seal part (not shown) B, 8th
It is formed as shown in Figure a), and the product W ₂ of width l is sealed around the four circumferences with sealing margins s ₁ , s ₂ , s ₃ , s ₄ . In this case, the center _C4 of the two-fold film F' is aligned with the center _C1 of the line. When forming the three-side seal bag shown in FIG. 13A using the strip film F having the same width as the four-side seal bag, rotate the handle 58 of the movement adjustment section 54 to move the bag making device 45 in the _Y1 direction. , and move the arc portion 49 side in the Y direction by the sealing distance x dimension, that is, displace the center C ₄ of the film F' upwards in the drawing by e (=X) with respect to the center C ₁ of the line ( (See Figure 8b). As a result, the seal _s2 in FIG.
A three-sided sealed bag can be formed by removing the bag (see FIG. 8b). In this case, the sealing allowance for the seal s ₁ is 2X, so the width of the folded film F', that is, the width of the strip film F, is 2L - 2X.
Furthermore, by setting the sealing cost of the seal _s1 to X, the packaging area (volume) can be increased, and it is economical to be able to package a large number of packaged products. Also, Fig. 13 C,
When forming a wide seal s′ ₁ or two seals s ₁ ″ on the top and bottom with a three-sided sealed bag shown in D and cutting out a hole for hanging, the center of the bifold film F′ is used.
By displacing _C4 by 2e (=2X) from the center of the line, the three-sided sealed bag shown in FIG. 8c and d can be obtained. In this way, by moving the bag making machine 45 using the strip film F having the same width dimension 2L, the packaging bags of the embodiments shown in FIGS. 8a to 8d can be obtained.
On the other hand, the 9th bag-making machine with a fixed conventional bag-making machine
As shown in Figures a' to d', the same four-sided sealed bag (Figure 9
a'), when making a three-sided sealed bag (Fig. 9 b'), the seal _s2 side of the side seal part must be stopped, and the wide seal _s1 ' or s ₁ '', it is impossible to displace the center _C4 of the 'bi-folded film F', so it is uneconomical that a wide 2L+4X strip-shaped film F has to be used. , if wide seals s ₁ ′, s ₂ ″ are to be applied to a double-folded film F′ with a width L, the center C ₁ of the conveyance line for the product W ₂ must be changed to the position C ₁ ′. Therefore, it is necessary to change the center position of the product supply conveyor, which has the disadvantage of complicating the structure of the device, but according to this example, there is no need for this, and only the bag making device 45 is moved and adjusted. Thus, the packaging bags of the embodiments shown in FIGS. 8a to 8d can be obtained using the same two-fold film F'. In addition, the angle of the oblique edge of the receptacle 46 of the bag making device 45 is formed into an acute angle α to increase the edge length H ₂ , so that the hanging length of the strip film can be increased.
Since H ₂ ' can be made long, the internal force applied to the same edge is distributed widely and evenly, making it possible to prevent wrinkles from forming on the films F and F'.

In addition, in this embodiment, the bag making device 45 is Y ₁ −
Although the example is shown in which the amount of movement in the Y-Y' direction is adjusted by moving in the _Y1 ' direction, the adjustment screw rod 5 of the movement adjustment section 54 is not limited to this.
6 perpendicular to the center line _C1 of the line and Y-
It may be moved only in the Y′ direction. In this case, the long attachment hole 51 can be provided to adjust the distance between the delivery conveyor 4 and the bag making device 45. In addition, the bag making device 45
Although the guide member 60 is illustrated as being movably attached via the movable body 56, the guide member 60 may be attached directly to the bag making device 45. Further, in the above embodiment, the center of the substantially U-shaped cross section of the bag making machine 45 and the center of the strip film F are aligned and folded. If it is provided so that it can be moved vertically with respect to the center of the folded film F', the length of one folded piece of the two-folded film F' can be made long, and the ears and lid parts shown in FIG. It becomes possible to form a packaging bag with the following features. In addition, although the adjustment screw rod 56 is provided in the movement adjustment section 45 for illustration, the invention is not limited to this. For example, it may be a pinion and a rack, a stepless wire, a rope, a chain, a link mechanism, a fluid cylinder, etc. good. Furthermore, although the movement adjustment section 54 is operated manually in the above example, it may be operated by a motor or the like. Further, in this embodiment, the bag making device 45 is illustrated as having a substantially triangular shape in plan and a substantially U-shaped side surface, but as shown in FIG. The lower plate 48 is attached to the movable body 59 by forming the plate 48 separately, and
A vertical movement adjusting member 76 moves the lower plate 48 and the upper plate 47.
The upper plate 47 may be provided so as to be movable in the vertical direction so as to be able to cope with changes in the height of the packaged product. Further, in the above embodiment, the upper and lower plates 47, 48 of the bag making device 45 are arranged at an angle α
For example, the bag making device 77 shown in FIG. 11 is formed with a substantially U-shaped cross section, and the lower plate 79 side on the receiving port 78 side is located at the center C ₁ of the conveyance line. formed into a perpendicular edge 79a,
An edge 80a of the upper plate 80 on the side of the receptacle 78 is provided obliquely at a predetermined angle α with respect to the center _C1 of the line, and a substantially triangular blade 82 is provided on the arcuate portion 81 side of the lower plate 79. There is. The bag making machine 77 formed in this way is provided so as to be movable and adjustable in a direction perpendicular to the center line _C1 of the line, and the strip-shaped film F is supplied from below via the feeding roller 83, and the film F is fed from below through the feeding roller 83. The center line _G1 is the bag making machine 77
It is supplied along the ridgeline of the circular arc portion 83 . Further, the feed roller 83 is configured to be movable in the same direction as the movement adjustment direction of the bag making device 77, so that the center _G1 of the strip film F can be easily aligned with respect to the movement of the bag making device 77. There is. Therefore, even in this case, the same effects as in the above embodiment can be obtained.

Now, the present invention is an abbreviation for folding a strip film into two.
The bag making machine is a bag making machine that folds and forms into a letter shape, and the bag making machine has a substantially U-shaped cross section and a substantially rectangular planar shape, and has a width H1 perpendicular to the conveyance line of the substantially U-shaped opposing plate. is provided to be wider than the width of the bi-folded film, and at least one of the opposing plates having a generally rectangular planar shape has a substantially U-shaped curved end side toward its diagonal side. A receiving edge having a length H2 longer than the folded length H'2 of the strip film is formed at an acute angle α with respect to the center line C1 of the conveyance line, and the bag making device is moved via a movement adjustment mechanism. Since the center line C4 of the bifold film can be displaced with respect to the center line C1 of the transport line, different packaging bags can be formed from a single-width strip film. In addition, by forming the slanted edge on the receiving side of the bag-making device at an acute angle, the hooking length of the film strip can be increased, thereby preventing wrinkles from forming on the film. This is an extremely practical device for making flat bags.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a schematic perspective view, Fig. 2 is a plan view, Fig. 3 is a side view,
Figure 4 is a plan view of the bag making machine, Figure 5 is a side view, Figure 6 is a perspective view of the bag making machine installed, and Figures 7 and 8 are bag making by moving the bag making machine. FIG. 9 is an explanatory diagram of a bag making mode using a conventional bag making machine, FIG. 10 is a perspective view showing another mode of the bag making machine, and FIG. 11A is a plan view of another mode of the bag making machine. Figure, 1st
FIG. 1B is a side view, FIGS. 12A and 12B are perspective views of the packaged product, FIGS. It is. 45...Bag making machine, 46...Socket, 52...Movement adjustment table, 54...Movement adjustment section, _H1 ...Width on the exit side of the bag making machine, _H2 ...Slanted length on the socket side , C ₁
... Center line of the conveyance line, C ₄ ... Center line of the bi-folded film, F... Strip-shaped film, F'... Bi-folded film.

Claims (1)

[Scope of utility model registration request] A bag-making machine that folds and forms a strip film into a roughly U-shaped double-fold.
The width H1 of the opposite plates perpendicular to the conveyance line is wider than the width of the bi-folded film, and at least one of the opposing plates each having a substantially rectangular planar shape has a substantially U-shaped curvature. Forming a receiving edge having a length H2 longer than the folded length H'2 of the strip film at an angle α that is an acute angle with respect to the center line C1 of the conveying line from the end side toward the diagonal side; Moreover, the flat bag making device is configured such that the bag making device is movable via a movement adjustment mechanism so that the center line C4 of the bifold film can be displaced with respect to the center line C1 of the transport line.