JPH0541001Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a folding device for a soft synthetic resin sheet product typified by a soft polyethylene bag.

[Conventional technology and its technical issues]

Unlike paper-like materials, soft, flexible, large-sized synthetic resin sheets (including films, the same applies hereinafter), such as flexible polyethylene bags, are often folded and packaged in outer bags to be made into products. . In this case, from the standpoint of ease of use, it is preferable to package the sheet products in a state in which they are folded one by one, rather than folding a plurality of sheet products all at once and placing them in an outer packaging bag. As a device for mechanically folding such large-sized soft synthetic resin sheet products one by one, there has been known a device proposed by the inventor of the present invention, such as Japanese Utility Model Publication No. 62-16443.

By the way, the folding method for soft synthetic resin sheet products varies depending on the sales format, such as display shelf dimensions and space, and the size of the soft synthetic resin sheet product. In some cases, it is said to be sufficient, and in other cases, it may be required to fold it in half to 3 layers (1/8 size).

However, in conventional folding devices of this type, the number of folding steps was fixed, so in order to meet the above-mentioned request, especially three-stage half-folding, the third folding process had to be carried out manually off-line, reducing productivity and work efficiency. It was bad.

The present invention was devised to solve the above-mentioned problems, and its purpose is to fold a soft synthetic resin sheet product in two or more stages with one machine, for example, up to two folds. and 3
To provide a compact device that can easily select and carry out folding.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a small-angle V-shape between the conveyor main belt, which is stretched so as to form inclined moving surfaces in at least three locations with a phase shift, and each of the inclined moving surfaces. It has the same number of folding mechanisms including a sub-belt stretched to form a V-shaped groove and flat folding blades that can move forward and backward into each V-shaped groove, and a final V-shaped groove entrance area. Further, a folding selection mechanism is disposed that closes the advance/retreat path of the folding blade and forms a transfer path between the folding blade and the main transport belt.

The fold selection mechanism includes a swingable hanging arm attached to a roller constituting one side entrance of the V-shaped groove, a selection roller supported by the hanging arm, and a folding mechanism wound between the selection roller and the roller. Been V
A belt that can come into contact with and separate from the roller that constitutes the other side entrance of the character-shaped groove, a belt-type belt that is equipped with an operating means for moving the hanging arm, a hanging arm that can swing about a support shaft, and the hanging arm. A roller-type device is commonly used which is equipped with a selection roller that is freely rotatable and supported so as to be able to move toward and away from the roller on the other side of the V-shaped groove, and an operating means for moving a hanging arm.

However, more simply, it may be made of a guide plate similar to an L-shape, and configured to form a guide surface similar to the reverse curvature of the main conveyor belt by being attached to a support means provided within the frame. .

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 shows the device of the present invention applied to a second and third fold selection type device, in which 1 is a box-shaped frame, and an upper frame 1' is connected to the left side.
At the upper right side, there is provided an introduction guide 103 for a soft synthetic resin sheet product, such as a polyethylene bag A, cut by a cutting mechanism 400 of a bag making machine.

A first folding mechanism 2 that operates in the vertical direction and a second folding mechanism 3 that operates in the horizontal direction are arranged near the right side of the frame 1, and a third folding mechanism 4 that operates in the vertical direction is arranged near the left side. A fold selection mechanism 7, which will be described later, is provided in the folding blade entry area of the third folding mechanism 4.
is located.

Further, the upper frame 1' is provided with a discharge mechanism 104 for feeding folded sheet products to the folded stacker S.
A final folding mechanism 6 for folding the entire plurality of sheet products is arranged vertically above.

Reference numeral 8 denotes a conveyor main belt, which is composed of a plurality of divided belts, each of which is endlessly wound around a plurality of rollers 80 to 86 (seven in the drawing) that are horizontally suspended at intervals across the frames 1 and 1'. has been done. To be more specific, the second roller 81 is arranged to be slightly diagonally to the right with respect to the first roller 80, and the belt is moved downward between these rollers and bent by the second roller 81. The third belt is horizontally spaced apart.
It is adapted to be horizontally moved between rollers 82. Further, the belt is moved upward by a fourth roller 83 spaced apart from the third roller 82 in the height direction, and a fifth roller 84 is disposed to the left of the fourth roller 83, and both of these rollers are moved upward. The belt is adapted to be moved horizontally between the rollers. Further, a sixth roller 85 is disposed to the right of the fifth roller 84, and a seventh roller 86 is disposed at a distance from these rollers in the height direction, and the belt is rotated by these fifth to seventh rollers. It has a loose side in the shape of a square, and tension control is performed by the seventh roller 86.

A guide roller 87 is disposed horizontally between the first roller 80 and the second roller 82 so as to protrude laterally beyond the outer diameter of the first roller 80, and a belt between the first roller 80 and the guide roller 87 A one-side inclined moving surface 8a is configured. Three rollers 90, 97, 91 are disposed horizontally in a position facing the one-side inclined moving surface 8a, symmetrically with the rollers 80, 87, 81 constituting this, and between these rollers 90, 97, 91 By winding the first sub-belt 9, the other side inclined moving surface 9a is formed, and the one side inclined moving surface 8a of the conveyor main belt 8 is formed.
A first V-shaped groove B having a small angle is formed by the first V-shaped groove B.

On the other hand, in the vicinity of the second roller 81, the second
Guide roller 8 that protrudes beyond the diameter of roller 81
8 is horizontally suspended, thereby creating a second one-side inclined moving surface 8.
b is formed, and a guide roller 89 that protrudes from the diameter of the third roller 82 is also arranged near the third roller 82 in the vertical direction, thereby forming a third one-side inclined moving surface 8c that is inclined with respect to the vertical line. ing. Then, the second roller 81 and the third roller 8
On the side facing 2, there are rollers 101,1 with a guide roller 108 in contact with the guide roller 88 in the middle.
02 are arranged, and the second sub-belt 10 is wound around them to form a horizontal conveyance section 12 together with the main conveyance belt 8, and the guide roller 10
A second other side inclined movement surface 10b is formed in a region extending between the roller 101 and the roller 101, and a second V-shaped groove C is formed by the second one side inclined movement surface 8b. Note that the end roller 102 is the third roller 82.
The phase is shifted moderately in the horizontal direction.

In the area from the third roller 82 to the fifth roller 84, three rollers 112, 113, 114 are horizontally disposed in a similar shape to the third roller 82, and the third sub-belt 11 is connected to these rollers and the fourth roller 83. is wound, so that a vertical conveyance section 13 and a horizontal conveyance section 14 are continuously constituted by the main conveyance belt 8. A roller 119 paired with a guide roller 89 is disposed between the roller 112 and the fourth roller 83, and thereby forms a third V-shaped groove D with the third one-side inclined moving surface 8c. 3, the other inclined moving surface 11c is stretched.

FIG. 2 shows the main conveyor belt 8 and the first to third belts.
A drive system for sub-belts 9, 10, and 11 is shown.
That is, a main motor 15 such as an inverter-controlled type is installed at the bottom of the frame 1, and a first reduction shaft 16 and a chain drive shaft 17 are horizontally mounted on the left side of the main motor 15. The output pulley 150 is connected to a driven pulley 160 of the first reduction shaft 16 by a V-belt 156. Also,
A driven pulley 161 is coaxially fixed to the first deceleration shaft 16, while a roller 91 of the first sub-belt 9,
The roller 112 of the second sub-belt 10 and the roller 114 of the third sub-belt 11 each have a pulley 9
5, 105, 115 are fixed, and the roller 9
5 between roller 115, roller 115 and roller 1
05, and between the roller 105 and the driven pulley 16
Intermediate pulleys 18a and 18 are provided at the intersections of 1 and 1, respectively.
b, 18c are interposed, and a transmission belt 19 such as a hexagonal belt is wound between these seven pulleys, whereby the first sub-belt 9 to third sub-belt 1
1 is moved in the direction of the arrow in FIG. 1, and the main conveyor belt 8 rotates with it.

The first folding mechanism 2 and the second folding mechanism 3 each have a V
It is equipped with flat folding blades 20 and 30 that can enter toward the bottom of the character-shaped grooves B and C, and is adapted to the sheet material, thickness, etc. by a synchronizing mechanism 5 as shown in Figs. 2 and 2a. It is designed to be driven synchronously.

First, the first folding blade 20 is supported at both ends by two rising arms 22, 22, and these rising arms 22, 22 are a set of two parallel links 21a, one end of which is pivotally connected to both side walls of the frame 1. It is pivotally attached to the free end side of 21b. Further, the second folding blade 30 is attached to the upper ends of a pair of parallel links 31a and 31b whose lower ends are pivotally connected to the frame 1.

Two shafts 50 are provided at intervals near the first deceleration shaft 16 and the chain drive shaft 17.
51 is rotatably mounted horizontally, and these shafts 50, 51
have first and second sprockets 52 with the same number of teeth,
53 is fixed, and an endless chain 54 is wound loosely between these sprockets, and on the loose side of the endless chain 54 is a drive sprocket 170 fixed to the chain drive shaft 17.
The endless chain 54 is sequentially engaged with the idle sprocket 55 arranged in the vicinity thereof.
The belt 16 is attached to pulleys 162 and 172 fixed to the chain drive shaft 17 and the first reduction shaft 16, respectively.
It is designed to be rotated by winding 7.

Furthermore, cams 56 and 57 which are out of phase with each other are fixed to both ends of the shafts 50 and 51, and these cams 56 and 57 are connected to parallel links 21a and 31a, respectively.
The cam follower 210, 310 attached to the cam follower 210, 310 comes into elastic contact via a spring.

Furthermore, an adjustment rod 58 is provided on the side wall of the frame 1 and is supported by guide blocks 1a and 1b so as to be able to move up and down. A pair of adjustment sprockets 59a and 59b are provided on the tension side and slack side of the shaft, respectively. A female thread is provided at the upper end of the adjustment rod 58, and an adjustment bolt 60 passing through the upper part of the frame is screwed into this, and the rotation of the adjustment bolt 60 raises and lowers the adjustment rod 58, thereby adjusting the positions of the sprockets 59a and 59b. by changing the first and second
The relative rotational position of the sprockets 52 and 53 can be changed, and the timing of the cams 56 and 57 can be freely advanced or delayed during operation of the device.

As shown in FIG. 1, the third folding mechanism 4 has a flat folding blade 40 disposed on the center line of the third V-shaped groove D, and the folding blade 40 is equipped with a clutch brake. A crank arm 410 is fixed to the output shaft of a motor 41 such as a geared motor, and is fixed to the tip of a bell crank arm 420 connected to this via a slide bearing 43, and the slide bearing 43 is attached to a guide rail 42 fixed within the frame. The folding blade 40 is slidably fitted so that the folding blade 40 can be moved in and out of the third V-shaped groove D.

The motor 41 is connected to a position detection sensor 43 such as a phototube placed on the horizontal conveyance section 12 or its extension.
The timing of operation is controlled by signals from the

The fold selection mechanism 7, which is a feature of the present invention, performs folding by the third descending mechanism 4, or closes the third V-shaped groove D to transport sheet products from the horizontal conveyance section 12 without performing the third fold. Vertical conveyance section 1
3 and 4.
The first example is shown in the figure, the second example is shown in FIGS. 5 and 6, and the third example is shown in FIGS. 7 and 8.

The first embodiment shown in FIGS. 3 and 4 is of a sliding belt type.
Hanging arm 70 via bearings 700 at both ends
, and both ends of the axis of a small-diameter selection roller 71 are horizontally suspended on the free end sides of the hanging arms 70 via bearings 701, and at least one side of the hanging arms 70 is set at a predetermined angle with this. The tip of the operating lever 73 is fixed to. Ring grooves are formed on both sides of the contact surface of the third sub-belt 11 of the roller 112, and correspondingly ring grooves are formed on the selection roller 71, and a spring belt or rubber band is formed between the ring grooves. A round belt 72 (hereinafter referred to as the round belt) made by the manufacturer is wound around the belt.

The selection roller 71 is normally located on the left side as shown by the imaginary line in FIG.
12, the round belt 72 is rotated by the selection roller 71.
It rotates counterclockwise between the two. Then, by tilting the operating lever 73 at the required time, the hanging arm 70 swings about the roller shaft 112a, and the selection roller 71 is moved between the end roller 102 of the second sub-belt 10 and the V-shaped groove entrance on the conveyor main belt 8 side. A position close to roller 82 is reached. As a result, the round belt 72 is moved from the end of the horizontal conveyance section 12 to the
The sheet product, which is in contact with the circumferential surface of the V-shaped groove of the roller 82 that forms the 3-V-shaped groove D, is thereby folded for the second time and conveyed horizontally, and is sandwiched between the round belt 72 and the main conveyance belt 8, and is smoothly conveyed. It changes direction and is delivered to the third V-shaped groove D.

In order to maintain the operating position of the selection roller 71, it is preferable that a holding mechanism act on the hanging arm 70 or the operating lever 73. Its mechanisms include hook type, clamper type,
Although it may be of any type, such as a spring type, in this embodiment a screw type is used to stop the operation lever 73 in the downward position. In other words, the operating lever 7
A female threaded hole 730 is provided at the required position of No. 3, and a through hole 731 is provided at the frame portion at the lever angle position corresponding to the operating position of the selection roller 71.
The bolt 732 is inserted through the hole 730 and screwed into the female threaded hole 730.

The second embodiment shown in FIGS. 5 and 6 uses an oscillating roller system, in which a support shaft 74 is located relatively close to the V-shaped groove entrance roller 112 of the third sub-belt 11.
is horizontally hung rotatably, one end of a hanging arm 70 is attached to this support shaft 74, a selection roller 71 having a large friction coefficient such as rubber is rotatably supported at the other end of the hanging arm 70, and the frame of the support shaft 74 is An operating lever 73 is fixed at a predetermined angle to the end protruding from 1,
The operating lever 73 and the frame 1 are connected by a spring 735 serving as a holding mechanism.

Under normal conditions, the selection roller 71 is located at an advantageous position away from the sheet transport line as shown by the solid line in FIG. Accordingly, the hanging arm 70 swings and selects the selection roller 71.
contacts the third V-shaped groove entrance roller 82 and rotates with it. As a result, the second folded sheet product horizontally transported by the horizontal transport section 12 is pulled into the third V-shaped groove D by being sandwiched between the main transport belt 8 moving the V-shaped groove entrance roller 82 and the selection roller 71. will be included.

The third embodiment shown in FIGS. 7 and 8 uses a guide plate type, and a base 75 having a length equal to or longer than the transfer width has a side surface made of a smooth material such as aluminum or stainless steel approximately L. shaped guide plate 7
6 is fixed, and a curved portion 760 is attached to the corner of the guide plate 76.
is formed. The guide plate 76 is arranged between the roller shafts 112a, 112a between the divided rollers so as not to hinder the rotation of the V-shaped groove entrance roller 112.
It is made into a comb-like shape with the spacing corresponding to the .

A bracket 77 that supports at least both ends of the base 75 is fixed in the frame 1, and the guide plate 76 is supported by this bracket 77.
As shown by the imaginary lines in FIGS. 7 and 8, the horizontal portion 7
61 extends substantially parallel to the horizontal moving portion 12, and the vertical portion 762 is supported so as to extend to the back of the third sub-belt 11 forming the third V-shaped groove D. As a result, the second folded sheet product advanced from the horizontal conveyance section 12 is transferred to the horizontal section 761 and the curved section 760.
3 It is guided to the V-shaped groove D.

The guide plate 76 may be removed from the frame 1 when not needed and stored in a suitable place, or it may be supported by providing a second bracket 77' on the frame 1 near the third V-shaped groove D as shown in the figure. You can leave it there. Further, if necessary, guide grooves may be provided on both side walls of the frame, and guide pins may be provided protruding from both ends of the base 75 so as to fit into the guide grooves to move the base 75 from the standby position to the operating position. .

Note that when the fold selection mechanism 7 is in the operating position, it is necessary to stop the operation of the third folding mechanism 4. This can be done by simply displaying a warning light or a buzzer, but in order to do this more reliably, it is preferable to use a detection switch 78 such as a limit switch, which is electrically connected to the starting switch section of the motor 41, and automatically The operation of the motor 41 is maintained in a stopped state. The detection switch 78 may be provided in the tilting stroke range of the operating lever 73,
It may also be provided in the swing stroke region of the hanging arm 70. In the third embodiment, the detection switch 78 may be embedded in the bracket 77 so that when the base 75 is placed, the weight of the base 75 opens the motor circuit.

[Effect of the embodiment]

When the main motor 15 is operated, the driven pulley 160 of the first reduction shaft 16 is rotated by the belt 156.
Sprocket 161 installed coaxially with this
As the conduction chain 19 rotates, the conduction chain 19
Move and rotate counterclockwise between. As a result, the tension side of the first sub-belt 9 is directed downward, and the second sub-belt 1
0, the tension side moves to the left, and the tension side of the third sub-belt 11 moves upward, and the main conveyor belt 8
also moves and rotates in the same way.

In addition, the chain drive shaft 17 is driven by the sprocket 162 provided on the first reduction shaft 16, which causes the drive sprocket 170 to rotate, and the first sprocket 52 and the second sprocket 5 to rotate.
3 rotates synchronously. As a result, the cams 56, 57 attached to the sprockets 52, 53 out of phase rotate, and the cams 56, 57
Each parallel link 21a, 21b, 31a, 31b swings by the gum follower 210, 310 in contact with the first folding blade 20 and the second folding blade 30 in a predetermined cycle. It advances and retreats from the character-shaped groove C.

On the other hand, if the motor 41 is driven with the fold selection mechanism 7 in the standby position, the crank arm 40,
Third folding blade 40 by bell crank arm 420
moves back and forth in the third V-shaped groove D intermittently. The timing of this operation is synchronized by a position detection sensor such as a phototube arranged on an extension of the horizontal conveyance section 12.

When the bag-making process is completed and the soft sheet product A cut into the required size by the seal cut mechanism 400 is placed on the guide plates 103, 103, the first folding blade 20 descends toward the bottom of the first V-shaped groove B. do.
As a result, the soft sheet product A is folded in half from the center as shown in FIG. 9a, and is drawn in while being held between the rollers 87 and 97 of the first V-shaped groove B, and transported downward.

Then, the moment the center part of the first folded soft sheet product A reaches the center line of the second V-shaped groove C,
As the second folding blade 30 approaches the bottom of the groove, it is further folded in half (second fold) as shown in FIG. Then, the second folded soft sheet product A is horizontally transported by the main transport belt 8 and the second sub-belt 10 that constitute the horizontal transport section 12, and when half of it protrudes leftward from the end of the horizontal transport section 12, a third The folding blade 40 enters toward the bottom of the third V-shaped groove D from below. As a result, the soft sheet product A is further folded in half (third fold) as shown in FIG. It will be accommodated in the upbound stack car S.

Since the two cams 56, 57 are driven by the first and second sprockets 52, 53 and the endless chain 54, simply adjusting the pushing timing of the folding blade 20 for the first folding to the appropriate timing by sheet position detection, The phase of the cams 56 and 57 makes it possible to always maintain the second fold at the correct timing without using any detection device. In addition, adjustment sprockets 59a and 59b are engaged with the tension side and slack side of the intermediate portion of the endless chain 54, and since they can be raised and lowered by the adjustment rod 58 while keeping the distance between both axes fixed, it can be adjusted depending on the material, thickness, etc. of the seat. Cam 56,5 freely to fit
7, that is, the sheet transport timing can be changed.

The above is a case where the first fold, second fold, and third fold are performed, and as a result, the soft sheet product A is 1/
Since it can be folded to a size of 8, the package size can be reduced. However, if the package size does not need to be reduced so much due to display space or display shelves, the fold selection mechanism 7 is moved to the operating position. That is, in the first embodiment and the second embodiment, the operating lever 73 is moved downward, and in this way, in the first embodiment, the hanging arm 70 moves the roller shaft 112a as shown by the solid line in FIG. The selection roller 71 swings counterclockwise as a fulcrum.
3V-shaped groove entrance roller 82 and end roller 10
2, and the tension side of the round belt 72 rotates synchronously with the roller 112 while contacting both circumferential surfaces of the roller 82.

In addition, in the second embodiment, the hanging arm 70 swings about the support shaft 74 as shown in the imaginary line in FIG.
The selection roller 71 contacts the roller 82 at the entrance of the V-shaped groove and is rotated counterclockwise. In addition, in the third embodiment, if the guide plate 76 is inserted into the frame and the base 75 is placed on the bracket 77, the guide plate 76 will move away from the horizontal part of the main conveyor belt 8, as shown by the imaginary line in FIG. It faces with a curvature similar to the curvature towards the rising part. These allow movable movement between the horizontal conveyance section 12 and the third V-shaped groove D (first embodiment, second embodiment).
Embodiment) or a fixed (embodiment in FIG. 3) delivery path E is created.

Then, the operation of the folding selection mechanism 7 is detected by the detection sensor 78, and the starting switch of the motor 41 is turned off in response to a signal from this point on, and the third folding mechanism 4 is erroneously activated, causing the folding blade 40 and the folding There is no fear that the selection mechanism 7 will be damaged.

Therefore, the soft sheet product that has been folded into the second fold as described above smoothly transfers from the horizontal conveyance section 12 to the third V-shaped groove D via the delivery path E without being folded into the third fold. D roller 89,
119, lifted up by the vertical conveyance section 13, and delivered from the horizontal conveyance section 14 to the discharge mechanism 104, that is, in the state shown in FIG. 9d, the stacker S
be accommodated in.

It should be noted that the above is an embodiment of the present invention, and the present invention is also applicable to the case where the third fold or more is performed.

[Effect of idea]

According to the present invention as described above, the number of folding steps after at least the second folding of the soft plastic sheet product can be freely selected and the package size can be adjusted to suit the sales method and the circumstances of the store. In addition, the structure is relatively simple, and since it is installed using the boundary area between the horizontal conveyance section and the vertical conveyance section after the second fold, the height of the device does not increase and the device can be made compact. Excellent effects can be obtained.

[Brief explanation of the drawing]

Figure 1 is a side view showing one embodiment of the present invention;
The figure is a side view showing the drive system, FIG. 2a is a perspective view of the folding synchronization mechanism according to the present invention, FIG. 3 is a side view showing the first embodiment of the folding selection mechanism, and FIG. 4 is a side view thereof. FIG. 5 is a side view showing a second embodiment of the fold selection mechanism, FIG. 6 is a side view thereof, and FIG. 7 is a side view showing a third embodiment of the fold selection mechanism.
FIG. 8 is a side view thereof, and FIG. 9 is a perspective view showing the folded state of the soft sheet in stages. 1... Frame, 2... First folding mechanism, 3...
Second folding mechanism, 4...Third folding mechanism, 7...Fold selection mechanism, B, C, D...V-shaped groove, 8...Main transport belt, 9...First sub-belt, 10... 2nd secondary belt, 11... 3rd secondary belt.

Claims (1)

[Claims for Utility Model Registration] (1) A small angle V between the conveyor main belt stretched so as to form inclined moving surfaces in at least three locations with a phase shift, and each of the inclined moving surfaces. It has the same number of folding mechanisms including a sub-belt stretched to form a V-shaped groove and flat folding blades that can move forward and backward into each V-shaped groove, and a final V-shaped groove. A folding device for soft synthetic resin sheet products, characterized in that a folding selection mechanism is disposed in an entrance area, which closes the advancing and retreating path of the folding blade and forms a delivery path between the folding blade and the main conveyance belt. (2) The fold selection mechanism includes a swingable hanging arm attached to a roller forming one side entrance of the V-shaped groove, a selection roller supported by the hanging arm, and a winding between the selection roller and the roller. Folding of the soft synthetic resin sheet product according to claim 1, which is equipped with a belt that can be rotated and moved toward and away from the roller constituting the other side entrance of the V-shaped groove, and an operating means for moving the hanging arm. Device. (3) The fold selection mechanism includes a hanging arm that can swing around a support shaft, a selection roller rotatably supported by the hanging arm and movable toward and away from the roller on the other side of the V-shaped groove, and the hanging arm. A folding device for a soft synthetic resin sheet product according to claim 1, which is provided with a moving operation means. (4) Practical use in which the fold selection mechanism consists of a guide plate similar to an L-shape, and is attached to a support means provided within the frame to form a guide surface similar to the reverse curvature of the main conveyor belt. A folding device for a soft synthetic resin sheet product according to claim 1.