JPS5890010A - Device for turning in film for packing in packer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a folding device used, for example, in a packaging machine for fruits and vegetables, for wrapping a product by folding a packaging film stretched over the packaging section of the machine onto the product.

An object of the present invention is to reliably fold a packaging film from the front, back, left and right directions of an article, to simplify the synchronized operation structure of the folding members, and to make it easy to change the timing of the folding operation depending on the article.

The packaging machine equipped with the packaging film folding device according to the present invention will be explained below. Figs. 1 to 6 show the packaging film conveying device 1 installed on the top of the machine, and Figs. , fixed on the front and rear sides. Two roller shafts 3 and 4 are rotatably installed from the outside on the left side between the frames 2, and a shaft 5, a pair of upper and lower shafts 6.7, and a pair of upper and lower shafts 8.1 are fixed. On the other hand, a pair of upper and lower shafts IQ, 11 are fixed to the cloth side.

Reference numeral 12 denotes a pair of opening/closing frames that are rotatably supported in the vertical direction on both front and rear ends of the shaft 6, and extend from the same shaft 6 to an upper midpoint between the roller shafts 3 and 4, and extend from the ends of the opening/closing frames 12. A support frame 13 having a handle 14 is fixed between the parts, and a pair of roller shafts 15 and 17 are rotatably installed on the base end side of the support frame 13, and a shaft 16 is also fixed thereto.

In FIG. 3, reference numeral 18 denotes a pair of upper and lower rollers rotatably supported on the front ends of the pair of upper and lower shafts 16°5;
are a pair of upper and lower rollers rotatably supported on the front end portions of the pair of upper and lower shafts 6, 7, both rollers 1B, 1;
The rack is spanned by five endless round belts 20 facing each other vertically on the rear side of the frame. 21 is the pair of upper and lower shafts 10. i
A pair of upper and lower rollers rotatably supported on the front end of f, and eight endless rollers are connected between the upper row 221 and the front side of the upper roller 18 via the upper roller 19. The round belt 22 is passed over the frame, and the lower roller 2
1 and the front side of the lower roller 1B, four endless round belts 23 are passed through the lower roller 19, and as shown in FIG. The lower running part 22B of the upper round belt 22 is interposed between the upper running part 23a of the belt 23, and the running parts 22a and 23a are alternately arranged one by one to form seven belt rows M. .

24 is a pair of upper and lower rollers rotatably supported on the front ends of the pair of upper and lower shafts 8 and 9; 25Fi is the roller 21;
A pair of upper and lower rollers are rotatably supported on the inside of the fixed frame 2, and both rollers 24 and 25 tension the pre-fertilizing tip pels 22 and 23. Note that the roller shaft 17 also causes the upper round bell) 20.2
It makes 2 nervous.

Reference numeral 26 denotes a cylindrical front holding member supported vertically movably with respect to the front fixed frame 2, and as shown in FIG. 4, the inner eight round belts 23 of the lower round belts 23 The lower running part of the round belt 23 is inserted, and the pressing part 26a is interposed between the upper and lower running parts of the circular belt 23. Note that this suppressor 21
corresponds to the inner five belts of the belt row M. 2
A pressure receiving plate 7 extends from the fixed frame 2 in correspondence with the presser member 26, and is interposed between the upper and lower running portions of the upper round belt 22, as shown in FIG.

Reference numeral 28 denotes a movable frame that is inserted through the lower shafts 5, 7, 9, and 11 so as to be movable in the axial direction thereof, and an operation bar 29 that extends outward from both left and right sides of the lower shaft through the front fixed frame 2. said upper shaft 16.1
? , 6, 8, and 10 can be inserted into a notch 28a formed at the upper edge of the moving frame 28. 30 is a pair of shafts 16 so as to be positioned within the moving frame 28.
A pair of upper and lower rollers 31 are movably and rotatably supported in the axial direction with respect to the upper and lower shafts 6.
．． A pair of upper and lower rollers 32 are similarly supported on the pair of upper and lower shafts 10.11, and these rows 230, 31.32 are used to adjust the movement of the moving frame 28. Since it is pushed by the moving frame 28, it moves in the axial direction following the moving frame 28.

33 is five endless round belts that are passed between the upper rollers 30 and 32 via the upper roller 31;
is the lower roller 3 between the lower rows 230 and 32.
The frame is six endless round belts passed through 1,
As shown in FIG. 4, between the upper running part 348 of the lower round belt 34, the lower running part 33a of the upper round belt 33
, and the running portions 33a and 34a are alternately arranged one by one to form eleven belt rows M. 35 is the pair of upper and lower shafts 8, so as to be positioned within the moving frame 28;
A pair of upper and lower rollers are movably and rotatably supported in the axial direction relative to the roller 9, and move in the axial direction following the adjustment of the movement of the moving frame 28, and inside the roller 32. A pair of upper and lower rollers 36 rotatably supported with respect to the movable frame 2B and a pre-fertilization tip bell) 33.3
It makes 4 nervous. Note that the upper round belt 33 is also kept under tension by the roller shaft 17.

Reference numeral 37 denotes a cylindrical rear presser member supported so as to be able to move up and down with respect to the movable frame 28-, and numeral 38 denotes a pressure receiving plate extending from the upper part of the movable frame 28 in correspondence with the rear presser member 37. Rear presser member 37, pressure receiving plate 3B and upper and lower image tip pels) 3
The positional relationship with 3.34 is the same as that of the front presser member 26.

A pair of pulleys 39 are supported at the rear ends of the roller shafts 3 and 4, and an endless round belt 40 is passed between the pulleys 39. In FIG. 3, 41 is a gear fixed to both the upper and lower rollers 21, and 42 is a gear fixed to the upper and lower rollers 32.
The drive rotation of the lower shaft 11 is transmitted to both gears 41, 42, and the gears 41, 32, . round belt 22
Rotation is transmitted to each part via ゜23, 33, 34, etc. Reference numeral 43 in FIG. 2 is a saw blade provided between both roller shafts 3 and 4 on the left side of the fixed frame 2, and is movable upward.

A case will be described in which the packaging film F is set from one of the pair of upper and lower take-up rolls 44 provided on the left side of the machine base in the transport device 1 configured as described above. In this case, the operation bar 29 is operated in advance to adjust the position of the moving frame 28 in accordance with the width dimension of the packaging film F. When the handle 14 on the left side of the machine shown in FIG.
8.30 is separated and the film supply port P is opened. From this state, the starting end of the packaging film F on the take-up roll 44 is guided to the supply port P via both roller shafts 3, 4, and placed on the lower round bells 20, 23, 34. Next, the opening/closing frame 12
When the rollers 1B, 30 on the upper side and the rollers 18, 30 on the lower side are brought closer together and the film supply port P is closed, both ends of the packaging film F are as shown in FIG.
Upper round bell) 22.33 lower running part 22a.

33& and lower round bell) 23.34 upper running part 23a
, 34a, above the running section 23&, 34B of the first row from the inside, the running section 22a of the second row; -33
The running section 23a of the 8th row under B.

They are alternately inserted above 34g, creating a meandering state.

Figures 1, 7, 8, and 9 show the article feeding device 45 installed at the front of the machine, and 46 is a cylindrical cover extending in the front-rear direction, the upper surface of which serves as a pedestal portion 46a for the article; As shown in FIG. 8, a running groove 47 is provided transparently from the center of the front edge to the center of the rear end of the pedestal portion 46a, and the rear end extends in the left-right direction to form an entry groove 47B. 48 is cover 46
A pair of left and right chains are supported between the front and rear sprockets 49, which are supported in opposite pairs at the front and rear ends of the interior, and 50 is a running member rotatably supported with respect to the chains 48 between the left and right chains 48. , consisting of a support part 51 and a transfer part 52 fixed to an upper end thereof,
It is normally erected by the bias of the spring 53, and a notch 52B is formed in the center of the transfer section 52, and the support section 5
A locking protrusion 54 is provided on one side of 1 to protrude. Reference numeral 55 denotes a retaining piece supported by a leaf spring 56 at the rear end and side edge of the running groove 47, and has inclined surfaces 55a and 55b on both upper and lower surfaces thereof.
is formed. 5T is a stopper supported above the front end of the chain 48, and is a stopper supported above the front end of the chain 48, and
It can come into contact with the transfer section 52 of. Reference numeral 58 denotes a switch operating rod exposed above the pedestal portion 41 at the front end-side edge of the traveling mechanism 47.

The article transfer operation of the supply device 450 configured as described above will be explained. With the traveling member 50 waiting at the front end of the chain 48, when the article W is placed on the pedestal part 46a and the switch operating rod 5B is pushed downward, the chain 48 is rotated in the direction of arrow A. The support portion 51 of the traveling member 50 passes through the traveling groove 47 of the pedestal portion 46B, the transfer portion 52 of the traveling member 50 moves on the pedestal portion 46a in the direction of the arrow, and the article W is pushed by this transfer portion S2. is transferred.

During this transfer, when the engagement protrusion 54 of the running member 50 hits the slanted surface 55b on the upper surface of the engagement piece 55, the engagement piece 55 is pushed downward against the force of the plate spring 56, and the running member 50
further moves and reaches the entry groove 47a of the pedestal portion 41 as shown in FIG.

At this position, the item W is placed on a pedestal device 59, which will be described later.

Then, when the chain 48 is reversed, the traveling member 50 moves in the opposite direction of the arrow A, and the engagement protrusion 54 moves into the engagement piece 55.
Upon hitting the lower slanted surface 55a, the running member 50 is tilted against the bias of the spring 53, as shown in FIG. Due to this tilting movement, the transfer portion 52 of the traveling member 50 enters the cover 46 through the entry groove 47a and moves along the inner surface of the pedestal portion 46B. The running member 50 is erected again by the urging force of the spring 53 at the front end of the chain 4B,
When the transfer section 52 is stopped by the stopper 57, it is stopped. The traveling member 50 waits at this stop position.

Figures 1, 2, 10, 11, and 12 show a pedestal device 59 on which the article W transferred from the supply device 45 is placed, and the upper ends of supports Q and 60 are moved up and down by a drive mechanism 116, which will be described later. A base 61 of the device 59 is fixed to. Reference numeral 62 denotes a mounting table rotatably mounted on a shaft 63 on the base 61, which is normally erected by the bias of a spring 64 and can be tilted in the direction of arrow B. Reference numeral 65 denotes a box-shaped fixed frame fixed to the base 61, and 66, 67, and 68 denote a plurality of support rods screwed to the rear frame and both left and right frames of the fixed frame 65, A pair of plywood boards 69 are inserted into each of the rod 66, the left support rod 67, and the right support rod 68 so as to be movable in the axial direction, and the rear base plate 69 is prevented from being removed by a holding plate 66a.

7G, 71.72 is the culm board 69 on the rear side, both plywood boards 6 on the left side
A plurality of mounting stands each having a shaft 73 rotatably mounted on the plywood 9 and the right side plywood 6g, each having a spring cooler 4
Due to the zero bias, the stopper shaft 7sK4 is always stopped and erected, and can be tilted in the direction of arrow B. Note that the number of mounting tables 70 on the rear side can be changed by removing the holding plate 66B.

The pedestal device 59 configured as described above corresponds to the feeding device 45 in the lowering position of the support column 60, and
The items W transferred from
．． 72, and is pushed up into the packaging section 8 of the conveying device 1 by the upward movement of the support column 60.

Figures 1, 18, 14, 15, 16, and 17 show the packaging film folding device 76 installed above the transport device 1, and 77 is placed on both left and right sides of the upper part of the machine as shown in Figure 15. A rear folding member 82 is a rear folding member 82 in which both sliders 79 supported so as to be movable in the front and back directions relative to the rail 78 are connected by a guide plate 8a and rollers 81 on both front and rear sides thereof. A pair of left and right folding members are attached to a shaft 84 so as to be rotatable in the left and right directions on the installed support plate 83, and extend forward from the coaxial attachment portion, and have a guide groove 85 transparent along the longitudinal direction thereof. ,
An auxiliary folding plate 86 is screwed onto the tip portion so that its position can be adjusted. Reference numeral 87 denotes a guide piece rotatably attached to a shaft 88 on both left and right sides of the lower surface of the guide plate 80 of the rear folding member 77, and is fitted into the guide groove 85 of the left and right folding member 82, as shown in FIG. In addition, both side edges of the guide groove 85 are engaged with a fitting groove 87a formed on the entire outer periphery.

89 is a plurality of rollers 90 between the front ends of both rails 78.
A front folding member constructed by constructing the supply device 4
A belt 91 is passed between the roller 90 and a belt pulley 92 provided coaxially with one of the sprockets 49 of 5,
The roller 90 is moved in conjunction with the chain 48 of the supply device 45.
It is configured to rotate only in the direction of the arrow.

Reference numeral 93 denotes a bracket erected on the rear end of the front snore rail 78; 94 denotes a lever fixed to a support shaft 95 rotatably installed between the upper parts of the bracket 93; A shaft 96a is rotatably attached to an interlocking rod 96 that moves up and down. 97 is a pair of levers fixed to both ends of the support shaft 95 on the outside of the bracket 93; 98 is a link rotatably attached to the shaft 99 at the tip of the lever 97; A shaft 100 is rotatably attached to the section.

When the interlocking rod 96 is in the upward movement position,
As shown in FIG. 15, the post-cocoon fertilization folding member 77 is in the retracted position, and the left and right folding members 82 are in an open state. When the interlocking rod 96 moves downward from this state, the rear folding member 77 moves to the lever 97 as shown in FIG.
As the link 98 moves forward, the guide groove 85 of the left and right folding members 82 is regulated in position by the guide piece 87 of the rear folding member 77, and the left and right folding members 82 close each other. The folded part R is between 82° and 82°.

Figures 1, 13, and 14 show a device 101 for discharging goods W,
A pair of support plates 102 are rotatably supported on a support shaft 103 installed between the lower portions of both brackets 93, and extend forward from the support shaft 103. Conveyor 1 on which the belt 104B is passed
04, the conveyor 104 corresponds to the packaging section S of the conveyance device 1. Reference numeral 106 denotes a support shaft 107 installed between the brackets 93 behind the support shaft 103.
The stopper is supported so as to be able to take eight positions, and the inclination of the conveyor 104 can be adjusted by engaging a stopper shaft 105 installed between the support plates 102 below the stopper.

108 is a belt pulley fixed to the drive shaft 104b of the conveyor 104, 109 is a belt pulley rotatably supported on the support shaft 103, and a belt 110 is passed between the belt pulleys 108 and 109. . 111 is belt wheel 10
The sprocket 11 is a sprocket rotatably supported on the support shaft 103 so as to be interlocked with the sprocket 9, and is provided coaxially with one sprocket 49 of the supply device 45.
The chain 112 is passed through a pair of idler sprockets 113 between the chain 4 and the chain 4 of the supply device 45.
8 and rotates the sprocket 109. Reference numeral 115 denotes a swinging rod that is swung back and forth by a drive mechanism 116 to be described later, and its upper end is connected to the chain 112.

When the swinging rod 115 is rotated in the direction of arrow D, the chain 112, sprocket 111, belt pulley 10
9. Conveyor 1 via belt 11o and belt wheel 10B
04 belt 104& rotates in the feeding direction E. However, the sprocket 111 is the one-way clutch 111
Since it is supported by the support shaft 1°3 at point a, the swinging rod 112
Even if it warps and rotates in the direction of the arrow, the rotation of the chain 112 is not transmitted to the sprocket 111, and the pel If14a of the conveyor 114 does not rotate in the opposite direction.

17, and a cam plate 119 is fixed to its output shaft 118a. A lever with a shaft 122 rotatably attached to a 120Vi bracket 121 (the tip of which is rotatably attached to the shaft 123 with respect to the middle of the support column 6o, and attached to the middle part of the lever 120). The row 2120a is engaged with a cam groove (not shown) of the cam plate 119. Reference numeral 124 is a lever rotatably supported on the fixed shaft 125, and its tip is connected to the lower end of the support column 6a. When the cam plate 119 rotates due to the rotation of the output shaft 114a, the lever 120 swings up and down about the shaft 122, and the support column 60 is moved up and down. 59 is also moved up and down.

127 is a two-pronged lever rotatably attached to the fixed shaft 128, one lever 129 is rotatably attached to the lower end of the interlocking rod 96, and the other lever 129 is rotatably attached to the lower end of the interlocking rod 96. A roller 131a attached to the lever 131 is engaged with the cam plate 119. When the output shaft 1188 rotates and the cam plate 119 rotates, the lever 127 is rotated around the fixed shaft 128, the interlocking rod 96 is moved up and down, and the rear folding member 77 of the folding device 76 is also moved forward and backward. Ru.

132 is a mounting rod fixed to the output shaft 118a, 133
is a link rotatably attached to the mounting rod 132 with a shaft 134, and the tip of the link 133 is rotatable in the middle of the swinging rod 115 rotatably attached to the fixed shaft 136. Axis 135 is attached to. When the cam plate 119 rotates due to the rotation of the output shaft 118a, the link 133 is reciprocated as the mounting rod 132 rotates, and the swing rod 115 is swung about the fixed shaft 136, causing the chain 112 to rotate.
is rotated back and forth. Due to this reciprocating rotation of the chain 112, the chain 4B of the feeding device 45 is also reciprocated.

137 in Fig. 1 is a heater device installed at the front of the machine in correspondence with the front folding member 89; 137 in Figs. 19 and 20;
A pair of plywood boards 8 are rotatably supported on both the left and right sides of the feeding device 45, and are supported on a pair of support arms 139 that are rotatably supported on both the left and right sides of the machine base. .

Next, an outline of the actual packaging operation will be explained.

When the switch operating rod 58 is pushed by the article W placed on the pedestal portion 46B of the feeding device 45, the swinging rod 115 is tilted in the direction of arrow D by the drive motor 117, and the feeding device 4
The chain 48 of No. 5 rotates in the direction of arrow A. Along with this, the traveling member 50 waiting at the front end of the supply device 45
moves in the direction of arrow A, and the article W is transferred in the same direction, moved down, and placed on the pick-up pedestal device 59. At this time, the rear folding member 77 is moved backward by the upward movement of the interlocking rod 96.

When the conveying device 1 is driven in synchronization with the feeding, the starting end of the packaging film F located at the supply port P is conveyed toward the packaging section S at the center of the conveying device 1. On the way, the saw blade 43 instantaneously moves upward to form perforations in the width direction at every fixed length of the packaging film F, and furthermore, an instantaneous brake is applied to the roller shaft 4, causing both the upper and lower shafts 15.
The packaging film F held between the packaging film F is pulled, and the tension causes the film to be cut at the perforations and conveyed to the packaging section S as shown by the imaginary line in FIG.

As shown in FIGS. 5 and 6, the packaging film r on the packaging section S is moved between the suppressing sections 26a and 37B and the pressure receiving plate 27. be held in place.

From this packaging film set state, as the support column 60 moves upward, the cradle device 5g is moved upward, and when the article W is pushed up to the packaging position as shown by the imaginary line in FIG. 2, the interlocking rod 96
is moved downward (r), and the rear folding member 77 in the retreated position moves forward, and along with the forward movement, both the left and right folding members 82
are closed to each other. Then, the rear folding member 77 tilts the rear mounting base 70 and the center mounting base 62 of the cradle device 59 in the direction of arrow B, and the left and right folding members 82 tilt the left and right mounting bases 71 and 72 of the cradle device 59. When the pedestal device 59 is tilted in the direction of the arrow B and moved downward again at the same time as this tilting, while the item W is placed on the rear folding member 77, the packaging film is removed from the rear and left and right directions below the item W. A folding operation F is performed.

After that, the interlocking rod 96 is moved upward again, and the rear folding member 77
With the retraction, both the left and right folding members 8'2 are opened to each other, and both presser members 26' and 37 are moved down to release the clamped state. Therefore, the article W is conveyed forward due to the rotation of the PEL) 1G4B, and at this time, the packaging film F hits the front folding member 89 on the underside of the article W and is folded from the front as well, and the article W passes on the front folding member 89. When the item W passes through, the folding from the front overlaps with the folding from both the rear and left and right directions, resulting in a folded portion PJ on the lower side of the item W, as shown in FIG.

After packaging, the same item W is conveyed onto the heater device 137,
Here, the packaging film folded portion Fl is brought into close contact with the packaging film by heat. Then, when the swinging rod 115 is bent and tilted in the direction of the arrow, the traveling member 50 of the supply device 45 is moved in the direction opposite to the arrow A, and the process is completed without leaving the standby state. The item W on the device 137 is removed by the worker, and
When the article W is again placed on the container 5, the next step of packaging is carried out in the same manner.

The present invention described in detail above has a force relief folding member 77 installed between a pair of rails 78 that is movable back and forth in the front-rear direction along the rails 78, and is movable in the left-right direction on the rear side of the rails 78. A pair of left and right folding members 82 supported by the left and right folding members 82 is provided, and a guide groove 85 is formed in the left and right folding members 82 into which the nine-id piece 87 attached to the rear folding member 77 is inserted, so that the rear folding member 770 can be moved back and forth. Accordingly, left and right folding members 82
A front folding member 89 is installed between the front parts of the rails 78, and as the rear folding member 77 moves forward, each folding member 89, 77. 77°82 is a folded part R approaching each other, and above the folded part R is an endless bell) 1
04a is installed on a conveyor 104 for carrying out. Therefore, when folding the packaging film r stretched over the packaging section S of the conveyance device 1 onto the item W,
The rear folding member 77 and both left and right folding members 82 synchronize to fold the article W from the rear and left and right directions, and then the front folding member 89 folds the article W from the front while being conveyed by the conveyor 104. The packaging film F can be reliably folded into W. In particular, the engagement between the guide piece 87 of the rear folding member 77 and the guide groove 85 of both the left and right folding members 82 simplifies the synchronized operation structure of both members 77 and 82, and the left and right folding members having different guide grooves 85 Simply using 82 has the effect of making it easy to change the folding operation timing according to the item W.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of a fruit and vegetable packaging machine using a folding device according to the present invention, FIG. 2 is a schematic front view, and FIG.
4 is a schematic enlarged sectional view taken along the line X-X of FIG. 8, FIGS. 5 and 6 are partial sectional views showing the clamped state by both the front and rear presser members, and FIG. 8 is a schematic plan view of the supply device, FIG. 9 is a partially enlarged sectional view showing the intrusion of the traveling member in the supply device, and FIG. 10 is a schematic side sectional view of the pedestal device. 11th
12 is a schematic front view, FIG. 18 is a schematic side sectional view of the folding device and the unloading device, FIG. 14 is a schematic front sectional view, and FIG. 15 is a schematic front sectional view of the present invention. FIG. 16 is a schematic plan view of the folding device; FIG. 16 is a schematic side sectional view; FIG. 17 is a partial sectional view showing how the guide piece of the rear folding member and the guide groove of both left and right folding members are engaged with each other in the folding device; Fig. 18 is a schematic side view of the drive mechanism, Fig. 19 is a schematic overall perspective view of the packaging machine showing the state in which the plywood at the front of the machine is not in use, and Fig. 20 is a schematic overall perspective view of the packaging machine showing the same state in use. , FIG. 21 is a sectional view showing an article packaged with a packaging film. Conveyance device 1, supply device 45, pedestal device 59, folding device r-6, rear folding member 77, rail 78, roller 81,
Left and right folding member 82, guide groove 85, guide piece 87, front folding member 89, roller 90, carrying out device 101, conveyor 104, belt 104a1 drive mechanism 11B, folding part R1 packaging film F, folding part PL, article W0 Patent application Person Fujipunk System Co., Ltd. Agent Patent Attorney Hironobu Onda Diagram 6

Claims (1)

[Claims] l A rear folding member (77) is installed between a pair of rails (78) and is movable back and forth in the front and back direction along the rails (78), and on the rear side of the rails (78). A pair of left and right folding members (82) supported so as to be rotatable in the left and right direction is provided, and the left and right folding members (82) are provided with the rear folding member (82).
A guide groove (85) is formed into which the guide piece (87) attached to the rear folding member (77) is inserted, and the left and right folding members (82) can be opened and closed with respect to each other as the rear folding member (77) moves back and forth. A front folding member (89) is installed between the front parts of the rail (78), and these front, rear, left and right folding members (89) (
The space between 77) and (82) is a folding part (R) in which each folding member (89), (77), and (82) approaches each other as the rear folding member (77) moves forward, and the space above the folding part (R) is 1 is a packaging film folding device for a packaging machine, characterized in that a conveyor (104) for carrying out carrying an endless belt (104B) is installed. 2. Packaging in the packaging machine according to claim 1, wherein the rear folding member (77) and the front folding member (89) are constructed by installing a plurality of rollers (81) and (90) between rails (78). film folding device.